/**************************************************************************** ** ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). ** All rights reserved. ** Contact: Nokia Corporation (qt-info@nokia.com) ** ** This file is part of the QtGui module of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:LGPL$ ** GNU Lesser General Public License Usage ** This file may be used under the terms of the GNU Lesser General Public ** License version 2.1 as published by the Free Software Foundation and ** appearing in the file LICENSE.LGPL included in the packaging of this ** file. Please review the following information to ensure the GNU Lesser ** General Public License version 2.1 requirements will be met: ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. ** ** In addition, as a special exception, Nokia gives you certain additional ** rights. These rights are described in the Nokia Qt LGPL Exception ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. ** ** GNU General Public License Usage ** Alternatively, this file may be used under the terms of the GNU General ** Public License version 3.0 as published by the Free Software Foundation ** and appearing in the file LICENSE.GPL included in the packaging of this ** file. Please review the following information to ensure the GNU General ** Public License version 3.0 requirements will be met: ** http://www.gnu.org/copyleft/gpl.html. ** ** Other Usage ** Alternatively, this file may be used in accordance with the terms and ** conditions contained in a signed written agreement between you and Nokia. ** ** ** ** ** ** $QT_END_LICENSE$ ** ****************************************************************************/ #include "qplatformdefs.h" #include "qabstracteventdispatcher.h" #include "qaccessible.h" #include "qapplication.h" #include "qclipboard.h" #include "qcursor.h" #include "qdesktopwidget.h" #include "qdir.h" #include "qevent.h" #include "qfile.h" #include "qfileinfo.h" #include "qgraphicsscene.h" #include "qhash.h" #include "qset.h" #include "qlayout.h" #include "qsessionmanager.h" #include "qstyle.h" #include "qstylefactory.h" #include "qtextcodec.h" #include "qtranslator.h" #include "qvariant.h" #include "qwidget.h" #include "private/qdnd_p.h" #include "qcolormap.h" #include "qdebug.h" #include "private/qstylesheetstyle_p.h" #include "private/qstyle_p.h" #include "qmessagebox.h" #include #include #include #include "qinputcontext.h" #include "private/qkeymapper_p.h" #ifdef Q_WS_X11 #include #endif #if defined(Q_WS_X11) || defined(Q_OS_SYMBIAN) #include "qinputcontextfactory.h" #endif #include "qguiplatformplugin_p.h" #include #include #include #include #if defined(Q_WS_X11) && !defined(QT_NO_EGL) #include #endif #include "qapplication_p.h" #include "private/qevent_p.h" #include "qwidget_p.h" #include "qapplication.h" #include "qgesture.h" #include "private/qgesturemanager_p.h" #include "private/qguiapplication_p.h" #include "qplatformfontdatabase_qpa.h" #ifndef QT_NO_LIBRARY #include "qlibrary.h" #endif #ifdef Q_WS_WINCE #include "qdatetime.h" #include "qguifunctions_wince.h" extern bool qt_wince_is_smartphone(); //qguifunctions_wince.cpp extern bool qt_wince_is_mobile(); //qguifunctions_wince.cpp extern bool qt_wince_is_pocket_pc(); //qguifunctions_wince.cpp #endif #include "qdatetime.h" #ifdef QT_MAC_USE_COCOA #include #endif //#define ALIEN_DEBUG #if defined(Q_OS_SYMBIAN) #include "qt_s60_p.h" #endif static void initResources() { #if defined(Q_WS_WINCE) Q_INIT_RESOURCE_EXTERN(qstyle_wince) Q_INIT_RESOURCE(qstyle_wince); #elif defined(Q_OS_SYMBIAN) Q_INIT_RESOURCE_EXTERN(qstyle_s60) Q_INIT_RESOURCE(qstyle_s60); #else Q_INIT_RESOURCE_EXTERN(qstyle) Q_INIT_RESOURCE(qstyle); #endif Q_INIT_RESOURCE_EXTERN(qmessagebox) Q_INIT_RESOURCE(qmessagebox); } QT_BEGIN_NAMESPACE Q_CORE_EXPORT void qt_call_post_routines(); QApplication::Type qt_appType=QApplication::Tty; QApplicationPrivate *QApplicationPrivate::self = 0; QInputContext *QApplicationPrivate::inputContext = 0; bool QApplicationPrivate::quitOnLastWindowClosed = true; #ifdef Q_WS_WINCE int QApplicationPrivate::autoMaximizeThreshold = -1; bool QApplicationPrivate::autoSipEnabled = false; #else bool QApplicationPrivate::autoSipEnabled = true; #endif QApplicationPrivate::QApplicationPrivate(int &argc, char **argv, QApplication::Type type, int flags) : QApplicationPrivateBase(argc, argv, flags) { application_type = type; qt_appType = type; #ifndef QT_NO_SESSIONMANAGER is_session_restored = false; #endif quitOnLastWindowClosed = true; #if defined(Q_WS_QWS) && !defined(QT_NO_DIRECTPAINTER) directPainters = 0; #endif #ifndef QT_NO_GESTURES gestureManager = 0; gestureWidget = 0; #endif // QT_NO_GESTURES #if defined(Q_WS_X11) || defined(Q_WS_WIN) move_cursor = 0; copy_cursor = 0; link_cursor = 0; #endif #if defined(Q_WS_WIN) ignore_cursor = 0; #endif if (!self) self = this; } QApplicationPrivate::~QApplicationPrivate() { if (self == this) self = 0; } /*! \class QApplication \brief The QApplication class manages the GUI application's control flow and main settings. QApplication contains the main event loop, where all events from the window system and other sources are processed and dispatched. It also handles the application's initialization, finalization, and provides session management. In addition, QApplication handles most of the system-wide and application-wide settings. For any GUI application using Qt, there is precisely \bold one QApplication object, no matter whether the application has 0, 1, 2 or more windows at any given time. For non-GUI Qt applications, use QCoreApplication instead, as it does not depend on the \l QtGui library. The QApplication object is accessible through the instance() function that returns a pointer equivalent to the global qApp pointer. QApplication's main areas of responsibility are: \list \o It initializes the application with the user's desktop settings such as palette(), font() and doubleClickInterval(). It keeps track of these properties in case the user changes the desktop globally, for example through some kind of control panel. \o It performs event handling, meaning that it receives events from the underlying window system and dispatches them to the relevant widgets. By using sendEvent() and postEvent() you can send your own events to widgets. \o It parses common command line arguments and sets its internal state accordingly. See the \l{QApplication::QApplication()} {constructor documentation} below for more details. \o It defines the application's look and feel, which is encapsulated in a QStyle object. This can be changed at runtime with setStyle(). \o It specifies how the application is to allocate colors. See setColorSpec() for details. \o It provides localization of strings that are visible to the user via translate(). \o It provides some magical objects like the desktop() and the clipboard(). \o It knows about the application's windows. You can ask which widget is at a certain position using widgetAt(), get a list of topLevelWidgets() and closeAllWindows(), etc. \o It manages the application's mouse cursor handling, see setOverrideCursor() \o On the X window system, it provides functions to flush and sync the communication stream, see flushX() and syncX(). \o It provides support for sophisticated \l{Session Management} {session management}. This makes it possible for applications to terminate gracefully when the user logs out, to cancel a shutdown process if termination isn't possible and even to preserve the entire application's state for a future session. See isSessionRestored(), sessionId() and commitData() and saveState() for details. \endlist Since the QApplication object does so much initialization, it \e{must} be created before any other objects related to the user interface are created. QApplication also deals with common command line arguments. Hence, it is usually a good idea to create it \e before any interpretation or modification of \c argv is done in the application itself. \table \header \o{2,1} Groups of functions \row \o System settings \o desktopSettingsAware(), setDesktopSettingsAware(), cursorFlashTime(), setCursorFlashTime(), doubleClickInterval(), setDoubleClickInterval(), setKeyboardInputInterval(), wheelScrollLines(), setWheelScrollLines(), palette(), setPalette(), font(), setFont(), fontMetrics(). \row \o Event handling \o exec(), processEvents(), exit(), quit(). sendEvent(), postEvent(), sendPostedEvents(), removePostedEvents(), hasPendingEvents(), notify(), macEventFilter(), qwsEventFilter(), x11EventFilter(), x11ProcessEvent(), winEventFilter(). \row \o GUI Styles \o style(), setStyle(). \row \o Color usage \o colorSpec(), setColorSpec(), qwsSetCustomColors(). \row \o Text handling \o installTranslator(), removeTranslator() translate(). \row \o Widgets \o allWidgets(), topLevelWidgets(), desktop(), activePopupWidget(), activeModalWidget(), clipboard(), focusWidget(), activeWindow(), widgetAt(). \row \o Advanced cursor handling \o overrideCursor(), setOverrideCursor(), restoreOverrideCursor(). \row \o X Window System synchronization \o flushX(), syncX(). \row \o Session management \o isSessionRestored(), sessionId(), commitData(), saveState(). \row \o Miscellaneous \o closeAllWindows(), startingUp(), closingDown(), type(). \endtable \sa QCoreApplication, QAbstractEventDispatcher, QEventLoop, QSettings */ /*! \enum QApplication::Type \value Tty a console application \value GuiClient a GUI client application \value GuiServer a GUI server application (for Qt for Embedded Linux) */ /*! \enum QApplication::ColorSpec \value NormalColor the default color allocation policy \value CustomColor the same as NormalColor for X11; allocates colors to a palette on demand under Windows \value ManyColor the right choice for applications that use thousands of colors See setColorSpec() for full details. */ /*! \fn QWidget *QApplication::topLevelAt(const QPoint &point) Returns the top-level widget at the given \a point; returns 0 if there is no such widget. */ /*! \fn QWidget *QApplication::topLevelAt(int x, int y) \overload Returns the top-level widget at the point (\a{x}, \a{y}); returns 0 if there is no such widget. */ /* The qt_init() and qt_cleanup() functions are implemented in the qapplication_xyz.cpp file. */ void qt_init(QApplicationPrivate *priv, int type #ifdef Q_WS_X11 , Display *display = 0, Qt::HANDLE visual = 0, Qt::HANDLE colormap = 0 #endif ); void qt_cleanup(); Qt::MouseButtons QApplicationPrivate::mouse_buttons = Qt::NoButton; Qt::KeyboardModifiers QApplicationPrivate::modifier_buttons = Qt::NoModifier; QStyle *QApplicationPrivate::app_style = 0; // default application style QString QApplicationPrivate::styleOverride; // style override #ifndef QT_NO_STYLE_STYLESHEET QString QApplicationPrivate::styleSheet; // default application stylesheet #endif QPointer QApplicationPrivate::leaveAfterRelease = 0; int QApplicationPrivate::app_cspec = QApplication::NormalColor; QPalette *QApplicationPrivate::sys_pal = 0; // default system palette QPalette *QApplicationPrivate::set_pal = 0; // default palette set by programmer #ifndef Q_WS_QPA Q_GLOBAL_STATIC(QMutex, applicationFontMutex) QFont *QApplicationPrivate::app_font = 0; // default application font #endif QFont *QApplicationPrivate::sys_font = 0; // default system font QFont *QApplicationPrivate::set_font = 0; // default font set by programmer QIcon *QApplicationPrivate::app_icon = 0; QWidget *QApplicationPrivate::main_widget = 0; // main application widget QWidget *QApplicationPrivate::focus_widget = 0; // has keyboard input focus QWidget *QApplicationPrivate::hidden_focus_widget = 0; // will get keyboard input focus after show() QWidget *QApplicationPrivate::active_window = 0; // toplevel with keyboard focus bool QApplicationPrivate::obey_desktop_settings = true; // use winsys resources #ifndef QT_NO_WHEELEVENT int QApplicationPrivate::wheel_scroll_lines; // number of lines to scroll #endif bool qt_is_gui_used; bool Q_WIDGETS_EXPORT qt_tab_all_widgets = true; bool qt_in_tab_key_event = false; int qt_antialiasing_threshold = -1; QSize QApplicationPrivate::app_strut = QSize(0,0); // no default application strut bool QApplicationPrivate::animate_ui = true; bool QApplicationPrivate::animate_menu = false; bool QApplicationPrivate::fade_menu = false; bool QApplicationPrivate::animate_combo = false; bool QApplicationPrivate::animate_tooltip = false; bool QApplicationPrivate::fade_tooltip = false; bool QApplicationPrivate::animate_toolbox = false; bool QApplicationPrivate::widgetCount = false; bool QApplicationPrivate::load_testability = false; #ifdef QT_KEYPAD_NAVIGATION # ifdef Q_OS_SYMBIAN Qt::NavigationMode QApplicationPrivate::navigationMode = Qt::NavigationModeKeypadDirectional; # else Qt::NavigationMode QApplicationPrivate::navigationMode = Qt::NavigationModeKeypadTabOrder; # endif QWidget *QApplicationPrivate::oldEditFocus = 0; #endif bool qt_tabletChokeMouse = false; inline bool QApplicationPrivate::isAlien(QWidget *widget) { return widget && !widget->isWindow(); } // ######## move to QApplicationPrivate // Default application palettes and fonts (per widget type) Q_GLOBAL_STATIC(PaletteHash, app_palettes) PaletteHash *qt_app_palettes_hash() { return app_palettes(); } FontHash::FontHash() { QHash::operator=(QGuiApplicationPrivate::platformIntegration()->fontDatabase()->defaultFonts()); } Q_GLOBAL_STATIC(FontHash, app_fonts) FontHash *qt_app_fonts_hash() { return app_fonts(); } QWidgetList *QApplicationPrivate::popupWidgets = 0; // has keyboard input focus QDesktopWidget *qt_desktopWidget = 0; // root window widgets #if !defined(Q_WS_QPA) && !defined(QT_NO_CLIPBOARD) QClipboard *qt_clipboard = 0; // global clipboard object #endif QWidgetList * qt_modal_stack = 0; // stack of modal widgets bool app_do_modal = false; /*! \internal */ void QApplicationPrivate::process_cmdline() { // process platform-indep command line if (!qt_is_gui_used || !argc) return; int i, j; j = 1; for (i=1; i= 0) { session_key = session_id.mid(p +1); session_id = session_id.left(p); } is_session_restored = true; } #endif #ifndef QT_NO_STYLE_STYLESHEET } else if (arg == "-stylesheet" && i < argc -1) { styleSheet = QLatin1String("file:///"); styleSheet.append(QString::fromLocal8Bit(argv[++i])); } else if (arg.indexOf("-stylesheet=") != -1) { styleSheet = QLatin1String("file:///"); styleSheet.append(QString::fromLocal8Bit(arg.right(arg.length() - 12))); #endif } else if (qstrcmp(arg, "-widgetcount") == 0) { widgetCount = true; } else if (qstrcmp(arg, "-testability") == 0) { load_testability = true; } else { argv[j++] = argv[i]; } if (!s.isEmpty()) { if (app_style) { delete app_style; app_style = 0; } styleOverride = s; } } if(j < argc) { argv[j] = 0; argc = j; } } /*! Initializes the window system and constructs an application object with \a argc command line arguments in \a argv. \warning The data referred to by \a argc and \a argv must stay valid for the entire lifetime of the QApplication object. In addition, \a argc must be greater than zero and \a argv must contain at least one valid character string. The global \c qApp pointer refers to this application object. Only one application object should be created. This application object must be constructed before any \l{QPaintDevice} {paint devices} (including widgets, pixmaps, bitmaps etc.). \note \a argc and \a argv might be changed as Qt removes command line arguments that it recognizes. Qt debugging options (not available if Qt was compiled without the QT_DEBUG flag defined): \list \o -nograb, tells Qt that it must never grab the mouse or the keyboard. \o -dograb (only under X11), running under a debugger can cause an implicit -nograb, use -dograb to override. \o -sync (only under X11), switches to synchronous mode for debugging. \endlist See \l{Debugging Techniques} for a more detailed explanation. All Qt programs automatically support the following command line options: \list \o -style= \e style, sets the application GUI style. Possible values are \c motif, \c windows, and \c platinum. If you compiled Qt with additional styles or have additional styles as plugins these will be available to the \c -style command line option. \o -style \e style, is the same as listed above. \o -stylesheet= \e stylesheet, sets the application \l styleSheet. The value must be a path to a file that contains the Style Sheet. \note Relative URLs in the Style Sheet file are relative to the Style Sheet file's path. \o -stylesheet \e stylesheet, is the same as listed above. \o -session= \e session, restores the application from an earlier \l{Session Management}{session}. \o -session \e session, is the same as listed above. \o -widgetcount, prints debug message at the end about number of widgets left undestroyed and maximum number of widgets existed at the same time \o -reverse, sets the application's layout direction to Qt::RightToLeft \o -qmljsdebugger=, activates the QML/JS debugger with a specified port. The value must be of format port:1234[,block], where block is optional and will make the application wait until a debugger connects to it. \endlist The X11 version of Qt supports some traditional X11 command line options: \list \o -display \e display, sets the X display (default is $DISPLAY). \o -geometry \e geometry, sets the client geometry of the first window that is shown. \o -fn or \c -font \e font, defines the application font. The font should be specified using an X logical font description. Note that this option is ignored when Qt is built with fontconfig support enabled. \o -bg or \c -background \e color, sets the default background color and an application palette (light and dark shades are calculated). \o -fg or \c -foreground \e color, sets the default foreground color. \o -btn or \c -button \e color, sets the default button color. \o -name \e name, sets the application name. \o -title \e title, sets the application title. \o -visual \c TrueColor, forces the application to use a TrueColor visual on an 8-bit display. \o -ncols \e count, limits the number of colors allocated in the color cube on an 8-bit display, if the application is using the QApplication::ManyColor color specification. If \e count is 216 then a 6x6x6 color cube is used (i.e. 6 levels of red, 6 of green, and 6 of blue); for other values, a cube approximately proportional to a 2x3x1 cube is used. \o -cmap, causes the application to install a private color map on an 8-bit display. \o -im, sets the input method server (equivalent to setting the XMODIFIERS environment variable) \o -inputstyle, defines how the input is inserted into the given widget, e.g., \c onTheSpot makes the input appear directly in the widget, while \c overTheSpot makes the input appear in a box floating over the widget and is not inserted until the editing is done. \endlist \section1 X11 Notes If QApplication fails to open the X11 display, it will terminate the process. This behavior is consistent with most X11 applications. \sa arguments() */ QApplication::QApplication(int &argc, char **argv) : QApplicationBase(*new QApplicationPrivate(argc, argv, GuiClient, 0x040000)) { Q_D(QApplication); d->construct(); } QApplication::QApplication(int &argc, char **argv, int _internal) : QApplicationBase(*new QApplicationPrivate(argc, argv, GuiClient, _internal)) { Q_D(QApplication); d->construct(); } /*! Constructs an application object with \a argc command line arguments in \a argv. If \a GUIenabled is true, a GUI application is constructed, otherwise a non-GUI (console) application is created. \warning The data referred to by \a argc and \a argv must stay valid for the entire lifetime of the QApplication object. In addition, \a argc must be greater than zero and \a argv must contain at least one valid character string. Set \a GUIenabled to false for programs without a graphical user interface that should be able to run without a window system. On X11, the window system is initialized if \a GUIenabled is true. If \a GUIenabled is false, the application does not connect to the X server. On Windows and Mac OS, currently the window system is always initialized, regardless of the value of GUIenabled. This may change in future versions of Qt. The following example shows how to create an application that uses a graphical interface when available. \snippet doc/src/snippets/code/src_gui_kernel_qapplication.cpp 0 */ QApplication::QApplication(int &argc, char **argv, bool GUIenabled ) : QApplicationBase(*new QApplicationPrivate(argc, argv, GUIenabled ? GuiClient : Tty, 0x040000)) { Q_D(QApplication); d->construct(); } QApplication::QApplication(int &argc, char **argv, bool GUIenabled , int _internal) : QApplicationBase(*new QApplicationPrivate(argc, argv, GUIenabled ? GuiClient : Tty, _internal)) { Q_D(QApplication); d->construct();} /*! Constructs an application object with \a argc command line arguments in \a argv. \warning The data referred to by \a argc and \a argv must stay valid for the entire lifetime of the QApplication object. In addition, \a argc must be greater than zero and \a argv must contain at least one valid character string. With Qt for Embedded Linux, passing QApplication::GuiServer for \a type makes this application the server (equivalent to running with the \c -qws option). */ QApplication::QApplication(int &argc, char **argv, Type type) : QApplicationBase(*new QApplicationPrivate(argc, argv, type, 0x040000)) { Q_D(QApplication); d->construct(); } QApplication::QApplication(int &argc, char **argv, Type type , int _internal) : QApplicationBase(*new QApplicationPrivate(argc, argv, type, _internal)) { Q_D(QApplication); d->construct(); } #if defined(Q_WS_X11) && !defined(QT_NO_EGL) static int qt_matchLibraryName(dl_phdr_info *info, size_t, void *data) { const char *name = static_cast(data); return strstr(info->dlpi_name, name) != 0; } #endif /*! \internal */ void QApplicationPrivate::construct( #ifdef Q_WS_X11 Display *dpy, Qt::HANDLE visual, Qt::HANDLE cmap #endif ) { initResources(); qt_is_gui_used = (qt_appType != QApplication::Tty); process_cmdline(); // Must be called before initialize() qt_init(this, qt_appType #ifdef Q_WS_X11 , dpy, visual, cmap #endif ); initialize(); eventDispatcher->startingUp(); #ifdef QT_EVAL extern void qt_gui_eval_init(uint); qt_gui_eval_init(application_type); #endif #if defined(Q_OS_SYMBIAN) && !defined(QT_NO_SYSTEMLOCALE) symbianInit(); #endif #ifndef QT_NO_LIBRARY if(load_testability) { QLibrary testLib(QLatin1String("qttestability")); if (testLib.load()) { typedef void (*TasInitialize)(void); TasInitialize initFunction = (TasInitialize)testLib.resolve("qt_testability_init"); #ifdef Q_OS_SYMBIAN // resolving method by name does not work on Symbian OS so need to use ordinal if(!initFunction) { initFunction = (TasInitialize)testLib.resolve("1"); } #endif if (initFunction) { initFunction(); } else { qCritical("Library qttestability resolve failed!"); } } else { qCritical("Library qttestability load failed!"); } } //make sure the plugin is loaded if (qt_is_gui_used) qt_guiPlatformPlugin(); #endif } #if defined(Q_WS_X11) // ### a string literal is a cont char* // ### using it as a char* is wrong and could lead to segfaults // ### if aargv is modified someday // ########## make it work with argc == argv == 0 static int aargc = 1; static char *aargv[] = { (char*)"unknown", 0 }; /*! \fn QApplication::QApplication(Display* display, Qt::HANDLE visual, Qt::HANDLE colormap) Creates an application, given an already open display \a display. If \a visual and \a colormap are non-zero, the application will use those values as the default Visual and Colormap contexts. \warning Qt only supports TrueColor visuals at depths higher than 8 bits-per-pixel. This function is only available on X11. */ QApplication::QApplication(Display* dpy, Qt::HANDLE visual, Qt::HANDLE colormap) : QApplicationBase(*new QApplicationPrivate(aargc, aargv, GuiClient, 0x040000)) { if (! dpy) qWarning("QApplication: Invalid Display* argument"); Q_D(QApplication); d->construct(dpy, visual, colormap); } QApplication::QApplication(Display* dpy, Qt::HANDLE visual, Qt::HANDLE colormap, int _internal) : QApplicationBase(*new QApplicationPrivate(aargc, aargv, GuiClient, _internal)) { if (! dpy) qWarning("QApplication: Invalid Display* argument"); Q_D(QApplication); d->construct(dpy, visual, colormap); QApplicationPrivate::app_compile_version = _internal; } /*! \fn QApplication::QApplication(Display *display, int &argc, char **argv, Qt::HANDLE visual, Qt::HANDLE colormap) Creates an application, given an already open \a display and using \a argc command line arguments in \a argv. If \a visual and \a colormap are non-zero, the application will use those values as the default Visual and Colormap contexts. \warning Qt only supports TrueColor visuals at depths higher than 8 bits-per-pixel. This function is only available on X11. */ QApplication::QApplication(Display *dpy, int &argc, char **argv, Qt::HANDLE visual, Qt::HANDLE colormap) : QApplicationBase(*new QApplicationPrivate(argc, argv, GuiClient, 0x040000)) { if (! dpy) qWarning("QApplication: Invalid Display* argument"); Q_D(QApplication); d->construct(dpy, visual, colormap); } QApplication::QApplication(Display *dpy, int &argc, char **argv, Qt::HANDLE visual, Qt::HANDLE colormap, int _internal) : QApplicationBase(*new QApplicationPrivate(argc, argv, GuiClient, _internal)) { if (! dpy) qWarning("QApplication: Invalid Display* argument"); Q_D(QApplication); d->construct(dpy, visual, colormap); QApplicationPrivate::app_compile_version = _internal; } #endif // Q_WS_X11 #ifndef QT_NO_STATEMACHINE extern int qRegisterGuiStateMachine(); extern int qUnregisterGuiStateMachine(); #endif /*! \fn void QApplicationPrivate::initialize() Initializes the QApplication object, called from the constructors. */ void QApplicationPrivate::initialize() { QWidgetPrivate::mapper = new QWidgetMapper; QWidgetPrivate::allWidgets = new QWidgetSet; if (qt_appType != QApplication::Tty) (void) QApplication::style(); // trigger creation of application style #ifndef QT_NO_STATEMACHINE // trigger registering of QStateMachine's GUI types qRegisterGuiStateMachine(); #endif is_app_running = true; // no longer starting up Q_Q(QApplication); #ifndef QT_NO_SESSIONMANAGER // connect to the session manager session_manager = new QSessionManager(q, session_id, session_key); #endif if (qgetenv("QT_USE_NATIVE_WINDOWS").toInt() > 0) q->setAttribute(Qt::AA_NativeWindows); #ifdef Q_WS_WINCE #ifdef QT_AUTO_MAXIMIZE_THRESHOLD autoMaximizeThreshold = QT_AUTO_MAXIMIZE_THRESHOLD; #else if (qt_wince_is_mobile()) autoMaximizeThreshold = 50; else autoMaximizeThreshold = -1; #endif //QT_AUTO_MAXIMIZE_THRESHOLD #endif //Q_WS_WINCE #ifndef QT_NO_WHEELEVENT QApplicationPrivate::wheel_scroll_lines = 3; #endif if (qt_is_gui_used) initializeMultitouch(); } /*! Returns the type of application (\l Tty, GuiClient, or GuiServer). The type is set when constructing the QApplication object. */ QApplication::Type QApplication::type() { return qt_appType; } /***************************************************************************** Functions returning the active popup and modal widgets. *****************************************************************************/ /*! Returns the active popup widget. A popup widget is a special top-level widget that sets the \c Qt::WType_Popup widget flag, e.g. the QMenu widget. When the application opens a popup widget, all events are sent to the popup. Normal widgets and modal widgets cannot be accessed before the popup widget is closed. Only other popup widgets may be opened when a popup widget is shown. The popup widgets are organized in a stack. This function returns the active popup widget at the top of the stack. \sa activeModalWidget(), topLevelWidgets() */ QWidget *QApplication::activePopupWidget() { return QApplicationPrivate::popupWidgets && !QApplicationPrivate::popupWidgets->isEmpty() ? QApplicationPrivate::popupWidgets->last() : 0; } /*! Returns the active modal widget. A modal widget is a special top-level widget which is a subclass of QDialog that specifies the modal parameter of the constructor as true. A modal widget must be closed before the user can continue with other parts of the program. Modal widgets are organized in a stack. This function returns the active modal widget at the top of the stack. \sa activePopupWidget(), topLevelWidgets() */ QWidget *QApplication::activeModalWidget() { return qt_modal_stack && !qt_modal_stack->isEmpty() ? qt_modal_stack->first() : 0; } /*! Cleans up any window system resources that were allocated by this application. Sets the global variable \c qApp to 0. */ QApplication::~QApplication() { Q_D(QApplication); #if !defined(Q_WS_QPA) && !defined(QT_NO_CLIPBOARD) // flush clipboard contents if (qt_clipboard) { QEvent event(QEvent::Clipboard); QApplication::sendEvent(qt_clipboard, &event); } #endif //### this should probable be done even later qt_call_post_routines(); // kill timers before closing down the dispatcher d->toolTipWakeUp.stop(); d->toolTipFallAsleep.stop(); #if !defined(Q_WS_QPA) d->eventDispatcher->closingDown(); d->eventDispatcher = 0; #endif QApplicationPrivate::is_app_closing = true; QApplicationPrivate::is_app_running = false; delete QWidgetPrivate::mapper; QWidgetPrivate::mapper = 0; // delete all widgets if (QWidgetPrivate::allWidgets) { QWidgetSet *mySet = QWidgetPrivate::allWidgets; QWidgetPrivate::allWidgets = 0; for (QWidgetSet::ConstIterator it = mySet->constBegin(); it != mySet->constEnd(); ++it) { register QWidget *w = *it; if (!w->parent()) // window w->destroy(true, true); } delete mySet; } delete qt_desktopWidget; qt_desktopWidget = 0; #if !defined(Q_WS_QPA) && !defined(QT_NO_CLIPBOARD) delete qt_clipboard; qt_clipboard = 0; #endif #if defined(Q_WS_X11) || defined(Q_WS_WIN) delete d->move_cursor; d->move_cursor = 0; delete d->copy_cursor; d->copy_cursor = 0; delete d->link_cursor; d->link_cursor = 0; #endif #if defined(Q_WS_WIN) delete d->ignore_cursor; d->ignore_cursor = 0; #endif delete QApplicationPrivate::app_pal; QApplicationPrivate::app_pal = 0; delete QApplicationPrivate::sys_pal; QApplicationPrivate::sys_pal = 0; delete QApplicationPrivate::set_pal; QApplicationPrivate::set_pal = 0; app_palettes()->clear(); #ifndef Q_WS_QPA { QMutexLocker locker(applicationFontMutex()); delete QApplicationPrivate::app_font; QApplicationPrivate::app_font = 0; } #endif delete QApplicationPrivate::sys_font; QApplicationPrivate::sys_font = 0; delete QApplicationPrivate::set_font; QApplicationPrivate::set_font = 0; app_fonts()->clear(); delete QApplicationPrivate::app_style; QApplicationPrivate::app_style = 0; delete QApplicationPrivate::app_icon; QApplicationPrivate::app_icon = 0; #ifndef QT_NO_DRAGANDDROP if (qt_is_gui_used) delete QDragManager::self(); #endif d->cleanupMultitouch(); qt_cleanup(); if (QApplicationPrivate::widgetCount) qDebug("Widgets left: %i Max widgets: %i \n", QWidgetPrivate::instanceCounter, QWidgetPrivate::maxInstances); #ifndef QT_NO_SESSIONMANAGER delete d->session_manager; d->session_manager = 0; #endif //QT_NO_SESSIONMANAGER QApplicationPrivate::obey_desktop_settings = true; QApplicationPrivate::app_strut = QSize(0, 0); QApplicationPrivate::animate_ui = true; QApplicationPrivate::animate_menu = false; QApplicationPrivate::fade_menu = false; QApplicationPrivate::animate_combo = false; QApplicationPrivate::animate_tooltip = false; QApplicationPrivate::fade_tooltip = false; QApplicationPrivate::widgetCount = false; #ifndef QT_NO_STATEMACHINE // trigger unregistering of QStateMachine's GUI types qUnregisterGuiStateMachine(); #endif } /*! \fn QWidget *QApplication::widgetAt(const QPoint &point) Returns the widget at global screen position \a point, or 0 if there is no Qt widget there. This function can be slow. \sa QCursor::pos(), QWidget::grabMouse(), QWidget::grabKeyboard() */ QWidget *QApplication::widgetAt(const QPoint &p) { QWidget *window = QApplication::topLevelAt(p); if (!window) return 0; QWidget *child = 0; if (!window->testAttribute(Qt::WA_TransparentForMouseEvents)) child = window->childAt(window->mapFromGlobal(p)); if (child) return child; if (window->testAttribute(Qt::WA_TransparentForMouseEvents)) { //shoot a hole in the widget and try once again, //suboptimal on Qt for Embedded Linux where we do //know the stacking order of the toplevels. int x = p.x(); int y = p.y(); QRegion oldmask = window->mask(); QPoint wpoint = window->mapFromGlobal(QPoint(x, y)); QRegion newmask = (oldmask.isEmpty() ? QRegion(window->rect()) : oldmask) - QRegion(wpoint.x(), wpoint.y(), 1, 1); window->setMask(newmask); QWidget *recurse = 0; if (QApplication::topLevelAt(p) != window) // verify recursion will terminate recurse = widgetAt(x, y); if (oldmask.isEmpty()) window->clearMask(); else window->setMask(oldmask); return recurse; } return window; } /*! \fn QWidget *QApplication::widgetAt(int x, int y) \overload Returns the widget at global screen position (\a x, \a y), or 0 if there is no Qt widget there. */ /*! \fn void QApplication::setArgs(int argc, char **argv) \internal */ /*! \internal */ bool QApplication::compressEvent(QEvent *event, QObject *receiver, QPostEventList *postedEvents) { if ((event->type() == QEvent::UpdateRequest || event->type() == QEvent::LayoutRequest || event->type() == QEvent::Resize || event->type() == QEvent::Move || event->type() == QEvent::LanguageChange || event->type() == QEvent::UpdateSoftKeys || event->type() == QEvent::InputMethod)) { for (QPostEventList::const_iterator it = postedEvents->constBegin(); it != postedEvents->constEnd(); ++it) { const QPostEvent &cur = *it; if (cur.receiver != receiver || cur.event == 0 || cur.event->type() != event->type()) continue; if (cur.event->type() == QEvent::LayoutRequest || cur.event->type() == QEvent::UpdateRequest) { ; } else if (cur.event->type() == QEvent::Resize) { ((QResizeEvent *)(cur.event))->s = ((QResizeEvent *)event)->s; } else if (cur.event->type() == QEvent::Move) { ((QMoveEvent *)(cur.event))->p = ((QMoveEvent *)event)->p; } else if (cur.event->type() == QEvent::LanguageChange) { ; } else if (cur.event->type() == QEvent::UpdateSoftKeys) { ; } else if ( cur.event->type() == QEvent::InputMethod ) { *(QInputMethodEvent *)(cur.event) = *(QInputMethodEvent *)event; } else { continue; } delete event; return true; } return false; } return QApplicationBase::compressEvent(event, receiver, postedEvents); } /*! \property QApplication::styleSheet \brief the application style sheet \since 4.2 By default, this property returns an empty string unless the user specifies the \c{-stylesheet} option on the command line when running the application. \sa QWidget::setStyle(), {Qt Style Sheets} */ /*! \property QApplication::autoMaximizeThreshold \since 4.4 \brief defines a threshold for auto maximizing widgets \bold{The auto maximize threshold is only available as part of Qt for Windows CE.} This property defines a threshold for the size of a window as a percentage of the screen size. If the minimum size hint of a window exceeds the threshold, calling show() will cause the window to be maximized automatically. Setting the threshold to 100 or greater means that the widget will always be maximized. Alternatively, setting the threshold to 50 means that the widget will be maximized only if the vertical minimum size hint is at least 50% of the vertical screen size. Setting the threshold to -1 disables the feature. On Windows CE the default is -1 (i.e., it is disabled). On Windows Mobile the default is 40. */ /*! \property QApplication::autoSipEnabled \since 4.5 \brief toggles automatic SIP (software input panel) visibility Set this property to \c true to automatically display the SIP when entering widgets that accept keyboard input. This property only affects widgets with the WA_InputMethodEnabled attribute set, and is typically used to launch a virtual keyboard on devices which have very few or no keys. \bold{ The property only has an effect on platforms which use software input panels, such as Windows CE and Symbian.} The default is platform dependent. */ #ifdef Q_WS_WINCE void QApplication::setAutoMaximizeThreshold(const int threshold) { QApplicationPrivate::autoMaximizeThreshold = threshold; } int QApplication::autoMaximizeThreshold() const { return QApplicationPrivate::autoMaximizeThreshold; } #endif void QApplication::setAutoSipEnabled(const bool enabled) { QApplicationPrivate::autoSipEnabled = enabled; } bool QApplication::autoSipEnabled() const { return QApplicationPrivate::autoSipEnabled; } #ifndef QT_NO_STYLE_STYLESHEET QString QApplication::styleSheet() const { return QApplicationPrivate::styleSheet; } void QApplication::setStyleSheet(const QString& styleSheet) { QApplicationPrivate::styleSheet = styleSheet; QStyleSheetStyle *proxy = qobject_cast(QApplicationPrivate::app_style); if (styleSheet.isEmpty()) { // application style sheet removed if (!proxy) return; // there was no stylesheet before setStyle(proxy->base); } else if (proxy) { // style sheet update, just repolish proxy->repolish(qApp); } else { // stylesheet set the first time QStyleSheetStyle *newProxy = new QStyleSheetStyle(QApplicationPrivate::app_style); QApplicationPrivate::app_style->setParent(newProxy); setStyle(newProxy); } } #endif // QT_NO_STYLE_STYLESHEET /*! Returns the application's style object. \sa setStyle(), QStyle */ QStyle *QApplication::style() { if (QApplicationPrivate::app_style) return QApplicationPrivate::app_style; if (!qt_is_gui_used) { Q_ASSERT(!"No style available in non-gui applications!"); return 0; } if (!QApplicationPrivate::app_style) { // Compile-time search for default style // QString style; #ifdef QT_BUILD_INTERNAL QString envStyle = QString::fromLocal8Bit(qgetenv("QT_STYLE_OVERRIDE")); #else QString envStyle; #endif if (!QApplicationPrivate::styleOverride.isEmpty()) { style = QApplicationPrivate::styleOverride; } else if (!envStyle.isEmpty()) { style = envStyle; } else { style = QApplicationPrivate::desktopStyleKey(); } QStyle *&app_style = QApplicationPrivate::app_style; app_style = QStyleFactory::create(style); if (!app_style) { QStringList styles = QStyleFactory::keys(); for (int i = 0; i < styles.size(); ++i) { if ((app_style = QStyleFactory::create(styles.at(i)))) break; } } if (!app_style) { Q_ASSERT(!"No styles available!"); return 0; } } // take ownership of the style QApplicationPrivate::app_style->setParent(qApp); if (!QApplicationPrivate::sys_pal) QApplicationPrivate::setSystemPalette(QApplicationPrivate::app_style->standardPalette()); if (QApplicationPrivate::set_pal) // repolish set palette with the new style QApplication::setPalette(*QApplicationPrivate::set_pal); #ifndef QT_NO_STYLE_STYLESHEET if (!QApplicationPrivate::styleSheet.isEmpty()) { qApp->setStyleSheet(QApplicationPrivate::styleSheet); } else #endif QApplicationPrivate::app_style->polish(qApp); return QApplicationPrivate::app_style; } /*! Sets the application's GUI style to \a style. Ownership of the style object is transferred to QApplication, so QApplication will delete the style object on application exit or when a new style is set and the old style is still the parent of the application object. Example usage: \snippet doc/src/snippets/code/src_gui_kernel_qapplication.cpp 1 When switching application styles, the color palette is set back to the initial colors or the system defaults. This is necessary since certain styles have to adapt the color palette to be fully style-guide compliant. Setting the style before a palette has been se, i.e., before creating QApplication, will cause the application to use QStyle::standardPalette() for the palette. \warning Qt style sheets are currently not supported for custom QStyle subclasses. We plan to address this in some future release. \sa style(), QStyle, setPalette(), desktopSettingsAware() */ void QApplication::setStyle(QStyle *style) { if (!style || style == QApplicationPrivate::app_style) return; QWidgetList all = allWidgets(); // clean up the old style if (QApplicationPrivate::app_style) { if (QApplicationPrivate::is_app_running && !QApplicationPrivate::is_app_closing) { for (QWidgetList::ConstIterator it = all.constBegin(); it != all.constEnd(); ++it) { register QWidget *w = *it; if (!(w->windowType() == Qt::Desktop) && // except desktop w->testAttribute(Qt::WA_WState_Polished)) { // has been polished QApplicationPrivate::app_style->unpolish(w); } } } QApplicationPrivate::app_style->unpolish(qApp); } QStyle *old = QApplicationPrivate::app_style; // save #ifndef QT_NO_STYLE_STYLESHEET if (!QApplicationPrivate::styleSheet.isEmpty() && !qobject_cast(style)) { // we have a stylesheet already and a new style is being set QStyleSheetStyle *newProxy = new QStyleSheetStyle(style); style->setParent(newProxy); QApplicationPrivate::app_style = newProxy; } else #endif // QT_NO_STYLE_STYLESHEET QApplicationPrivate::app_style = style; QApplicationPrivate::app_style->setParent(qApp); // take ownership // take care of possible palette requirements of certain gui // styles. Do it before polishing the application since the style // might call QApplication::setPalette() itself if (QApplicationPrivate::set_pal) { QApplication::setPalette(*QApplicationPrivate::set_pal); } else if (QApplicationPrivate::sys_pal) { QApplicationPrivate::initializeWidgetPaletteHash(); QApplicationPrivate::setPalette_helper(*QApplicationPrivate::sys_pal, /*className=*/0, /*clearWidgetPaletteHash=*/false); } else if (!QApplicationPrivate::sys_pal) { // Initialize the sys_pal if it hasn't happened yet... QApplicationPrivate::setSystemPalette(QApplicationPrivate::app_style->standardPalette()); } // initialize the application with the new style QApplicationPrivate::app_style->polish(qApp); // re-polish existing widgets if necessary if (QApplicationPrivate::is_app_running && !QApplicationPrivate::is_app_closing) { for (QWidgetList::ConstIterator it1 = all.constBegin(); it1 != all.constEnd(); ++it1) { register QWidget *w = *it1; if (w->windowType() != Qt::Desktop && w->testAttribute(Qt::WA_WState_Polished)) { if (w->style() == QApplicationPrivate::app_style) QApplicationPrivate::app_style->polish(w); // repolish #ifndef QT_NO_STYLE_STYLESHEET else w->setStyleSheet(w->styleSheet()); // touch #endif } } for (QWidgetList::ConstIterator it2 = all.constBegin(); it2 != all.constEnd(); ++it2) { register QWidget *w = *it2; if (w->windowType() != Qt::Desktop && !w->testAttribute(Qt::WA_SetStyle)) { QEvent e(QEvent::StyleChange); QApplication::sendEvent(w, &e); w->update(); } } } #ifndef QT_NO_STYLE_STYLESHEET if (QStyleSheetStyle *oldProxy = qobject_cast(old)) { oldProxy->deref(); } else #endif if (old && old->parent() == qApp) { delete old; } if (QApplicationPrivate::focus_widget) { QFocusEvent in(QEvent::FocusIn, Qt::OtherFocusReason); QApplication::sendEvent(QApplicationPrivate::focus_widget->style(), &in); QApplicationPrivate::focus_widget->update(); } } /*! \overload Requests a QStyle object for \a style from the QStyleFactory. The string must be one of the QStyleFactory::keys(), typically one of "windows", "motif", "cde", "plastique", "windowsxp", or "macintosh". Style names are case insensitive. Returns 0 if an unknown \a style is passed, otherwise the QStyle object returned is set as the application's GUI style. \warning To ensure that the application's style is set correctly, it is best to call this function before the QApplication constructor, if possible. */ QStyle* QApplication::setStyle(const QString& style) { QStyle *s = QStyleFactory::create(style); if (!s) return 0; setStyle(s); return s; } /*! Returns the color specification. \sa QApplication::setColorSpec() */ int QApplication::colorSpec() { return QApplicationPrivate::app_cspec; } /*! Sets the color specification for the application to \a spec. The color specification controls how the application allocates colors when run on a display with a limited amount of colors, e.g. 8 bit / 256 color displays. The color specification must be set before you create the QApplication object. The options are: \list \o QApplication::NormalColor. This is the default color allocation strategy. Use this option if your application uses buttons, menus, texts and pixmaps with few colors. With this option, the application uses system global colors. This works fine for most applications under X11, but on the Windows platform, it may cause dithering of non-standard colors. \o QApplication::CustomColor. Use this option if your application needs a small number of custom colors. On X11, this option is the same as NormalColor. On Windows, Qt creates a Windows palette, and allocates colors to it on demand. \o QApplication::ManyColor. Use this option if your application is very color hungry, e.g., it requires thousands of colors. \br Under X11 the effect is: \list \o For 256-color displays which have at best a 256 color true color visual, the default visual is used, and colors are allocated from a color cube. The color cube is the 6x6x6 (216 color) "Web palette" (the red, green, and blue components always have one of the following values: 0x00, 0x33, 0x66, 0x99, 0xCC, or 0xFF), but the number of colors can be changed by the \e -ncols option. The user can force the application to use the true color visual with the \l{QApplication::QApplication()}{-visual} option. \o For 256-color displays which have a true color visual with more than 256 colors, use that visual. Silicon Graphics X servers this feature, for example. They provide an 8 bit visual by default but can deliver true color when asked. \endlist On Windows, Qt creates a Windows palette, and fills it with a color cube. \endlist Be aware that the CustomColor and ManyColor choices may lead to colormap flashing: The foreground application gets (most) of the available colors, while the background windows will look less attractive. Example: \snippet doc/src/snippets/code/src_gui_kernel_qapplication.cpp 2 \sa colorSpec() */ void QApplication::setColorSpec(int spec) { if (qApp) qWarning("QApplication::setColorSpec: This function must be " "called before the QApplication object is created"); QApplicationPrivate::app_cspec = spec; } /*! \property QApplication::globalStrut \brief the minimum size that any GUI element that the user can interact with should have For example, no button should be resized to be smaller than the global strut size. The strut size should be considered when reimplementing GUI controls that may be used on touch-screens or similar I/O devices. Example: \snippet doc/src/snippets/code/src_gui_kernel_qapplication.cpp 3 By default, this property contains a QSize object with zero width and height. */ QSize QApplication::globalStrut() { return QApplicationPrivate::app_strut; } void QApplication::setGlobalStrut(const QSize& strut) { QApplicationPrivate::app_strut = strut; } /*! \fn QPalette QApplication::palette(const QWidget* widget) \overload If a \a widget is passed, the default palette for the widget's class is returned. This may or may not be the application palette. In most cases there is no special palette for certain types of widgets, but one notable exception is the popup menu under Windows, if the user has defined a special background color for menus in the display settings. \sa setPalette(), QWidget::palette() */ QPalette QApplication::palette(const QWidget* w) { PaletteHash *hash = app_palettes(); if (w && hash && hash->size()) { QHash::ConstIterator it = hash->constFind(w->metaObject()->className()); if (it != hash->constEnd()) return *it; for (it = hash->constBegin(); it != hash->constEnd(); ++it) { if (w->inherits(it.key())) return it.value(); } } return palette(); } /*! \overload Returns the palette for widgets of the given \a className. \sa setPalette(), QWidget::palette() */ QPalette QApplication::palette(const char *className) { if (!QApplicationPrivate::app_pal) palette(); PaletteHash *hash = app_palettes(); if (className && hash && hash->size()) { QHash::ConstIterator it = hash->constFind(className); if (it != hash->constEnd()) return *it; } return *QApplicationPrivate::app_pal; } void QApplicationPrivate::setPalette_helper(const QPalette &palette, const char* className, bool clearWidgetPaletteHash) { QPalette pal = palette; if (QApplicationPrivate::app_style) QApplicationPrivate::app_style->polish(pal); // NB: non-const reference bool all = false; PaletteHash *hash = app_palettes(); if (!className) { if (QApplicationPrivate::app_pal && pal.isCopyOf(*QApplicationPrivate::app_pal)) return; if (!QApplicationPrivate::app_pal) QApplicationPrivate::app_pal = new QPalette(pal); else *QApplicationPrivate::app_pal = pal; if (hash && hash->size()) { all = true; if (clearWidgetPaletteHash) hash->clear(); } } else if (hash) { hash->insert(className, pal); } if (QApplicationPrivate::is_app_running && !QApplicationPrivate::is_app_closing) { // Send ApplicationPaletteChange to qApp itself, and to the widgets. QEvent e(QEvent::ApplicationPaletteChange); QApplication::sendEvent(QApplication::instance(), &e); QWidgetList wids = QApplication::allWidgets(); for (QWidgetList::ConstIterator it = wids.constBegin(); it != wids.constEnd(); ++it) { register QWidget *w = *it; if (all || (!className && w->isWindow()) || w->inherits(className)) // matching class QApplication::sendEvent(w, &e); } // Send to all scenes as well. #ifndef QT_NO_GRAPHICSVIEW QList &scenes = qApp->d_func()->scene_list; for (QList::ConstIterator it = scenes.constBegin(); it != scenes.constEnd(); ++it) { QApplication::sendEvent(*it, &e); } #endif //QT_NO_GRAPHICSVIEW } if (!className && (!QApplicationPrivate::sys_pal || !palette.isCopyOf(*QApplicationPrivate::sys_pal))) { if (!QApplicationPrivate::set_pal) QApplicationPrivate::set_pal = new QPalette(palette); else *QApplicationPrivate::set_pal = palette; } } /*! Changes the default application palette to \a palette. If \a className is passed, the change applies only to widgets that inherit \a className (as reported by QObject::inherits()). If \a className is left 0, the change affects all widgets, thus overriding any previously set class specific palettes. The palette may be changed according to the current GUI style in QStyle::polish(). \warning Do not use this function in conjunction with \l{Qt Style Sheets}. When using style sheets, the palette of a widget can be customized using the "color", "background-color", "selection-color", "selection-background-color" and "alternate-background-color". \note Some styles do not use the palette for all drawing, for instance, if they make use of native theme engines. This is the case for the Windows XP, Windows Vista, and Mac OS X styles. \sa QWidget::setPalette(), palette(), QStyle::polish() */ void QApplication::setPalette(const QPalette &palette, const char* className) { QApplicationPrivate::setPalette_helper(palette, className, /*clearWidgetPaletteHash=*/ true); } void QApplicationPrivate::setSystemPalette(const QPalette &pal) { QPalette adjusted; #if 0 // adjust the system palette to avoid dithering QColormap cmap = QColormap::instance(); if (cmap.depths() > 4 && cmap.depths() < 24) { for (int g = 0; g < QPalette::NColorGroups; g++) for (int i = 0; i < QPalette::NColorRoles; i++) { QColor color = pal.color((QPalette::ColorGroup)g, (QPalette::ColorRole)i); color = cmap.colorAt(cmap.pixel(color)); adjusted.setColor((QPalette::ColorGroup)g, (QPalette::ColorRole) i, color); } } #else adjusted = pal; #endif if (!sys_pal) sys_pal = new QPalette(adjusted); else *sys_pal = adjusted; if (!QApplicationPrivate::set_pal) QApplication::setPalette(*sys_pal); } /*! Returns the default application font. \sa fontMetrics(), QWidget::font() */ QFont QApplication::font() { #ifndef Q_WS_QPA QMutexLocker locker(applicationFontMutex()); if (!QApplicationPrivate::app_font) QApplicationPrivate::app_font = new QFont(QLatin1String("Helvetica")); return *QApplicationPrivate::app_font; #else return QGuiApplication::font(); #endif } /*! \overload Returns the default font for the \a widget. \sa fontMetrics(), QWidget::setFont() */ QFont QApplication::font(const QWidget *widget) { FontHash *hash = app_fonts(); #ifdef Q_WS_MAC // short circuit for small and mini controls if (widget->testAttribute(Qt::WA_MacSmallSize)) { return hash->value("QSmallFont"); } else if (widget->testAttribute(Qt::WA_MacMiniSize)) { return hash->value("QMiniFont"); } #endif if (widget && hash && hash->size()) { QHash::ConstIterator it = hash->constFind(widget->metaObject()->className()); if (it != hash->constEnd()) return it.value(); for (it = hash->constBegin(); it != hash->constEnd(); ++it) { if (widget->inherits(it.key())) return it.value(); } } return font(); } /*! \overload Returns the font for widgets of the given \a className. \sa setFont(), QWidget::font() */ QFont QApplication::font(const char *className) { FontHash *hash = app_fonts(); if (className && hash && hash->size()) { QHash::ConstIterator it = hash->constFind(className); if (it != hash->constEnd()) return *it; } return font(); } /*! Changes the default application font to \a font. If \a className is passed, the change applies only to classes that inherit \a className (as reported by QObject::inherits()). On application start-up, the default font depends on the window system. It can vary depending on both the window system version and the locale. This function lets you override the default font; but overriding may be a bad idea because, for example, some locales need extra large fonts to support their special characters. \warning Do not use this function in conjunction with \l{Qt Style Sheets}. The font of an application can be customized using the "font" style sheet property. To set a bold font for all QPushButtons, set the application styleSheet() as "QPushButton { font: bold }" \sa font(), fontMetrics(), QWidget::setFont() */ void QApplication::setFont(const QFont &font, const char *className) { bool all = false; FontHash *hash = app_fonts(); if (!className) { #ifndef Q_WS_QPA QMutexLocker locker(applicationFontMutex()); if (!QApplicationPrivate::app_font) QApplicationPrivate::app_font = new QFont(font); else *QApplicationPrivate::app_font = font; #else QGuiApplication::setFont(font); #endif if (hash && hash->size()) { all = true; hash->clear(); } } else if (hash) { hash->insert(className, font); } if (QApplicationPrivate::is_app_running && !QApplicationPrivate::is_app_closing) { // Send ApplicationFontChange to qApp itself, and to the widgets. QEvent e(QEvent::ApplicationFontChange); QApplication::sendEvent(QApplication::instance(), &e); QWidgetList wids = QApplication::allWidgets(); for (QWidgetList::ConstIterator it = wids.constBegin(); it != wids.constEnd(); ++it) { register QWidget *w = *it; if (all || (!className && w->isWindow()) || w->inherits(className)) // matching class sendEvent(w, &e); } #ifndef QT_NO_GRAPHICSVIEW // Send to all scenes as well. QList &scenes = qApp->d_func()->scene_list; for (QList::ConstIterator it = scenes.constBegin(); it != scenes.constEnd(); ++it) { QApplication::sendEvent(*it, &e); } #endif //QT_NO_GRAPHICSVIEW } if (!className && (!QApplicationPrivate::sys_font || !font.isCopyOf(*QApplicationPrivate::sys_font))) { if (!QApplicationPrivate::set_font) QApplicationPrivate::set_font = new QFont(font); else *QApplicationPrivate::set_font = font; } } /*! \internal */ void QApplicationPrivate::setSystemFont(const QFont &font) { if (!sys_font) sys_font = new QFont(font); else *sys_font = font; if (!QApplicationPrivate::set_font) QApplication::setFont(*sys_font); } /*! \internal */ QString QApplicationPrivate::desktopStyleKey() { return qt_guiPlatformPlugin()->styleName(); } /*! \property QApplication::windowIcon \brief the default window icon \sa QWidget::setWindowIcon(), {Setting the Application Icon} */ QIcon QApplication::windowIcon() { return QApplicationPrivate::app_icon ? *QApplicationPrivate::app_icon : QIcon(); } void QApplication::setWindowIcon(const QIcon &icon) { if (!QApplicationPrivate::app_icon) QApplicationPrivate::app_icon = new QIcon(); *QApplicationPrivate::app_icon = icon; if (QApplicationPrivate::is_app_running && !QApplicationPrivate::is_app_closing) { #ifdef Q_WS_MAC void qt_mac_set_app_icon(const QPixmap &); //qapplication_mac.cpp QSize size = QApplicationPrivate::app_icon->actualSize(QSize(128, 128)); qt_mac_set_app_icon(QApplicationPrivate::app_icon->pixmap(size)); #endif QEvent e(QEvent::ApplicationWindowIconChange); QWidgetList all = QApplication::allWidgets(); for (QWidgetList::ConstIterator it = all.constBegin(); it != all.constEnd(); ++it) { register QWidget *w = *it; if (w->isWindow()) sendEvent(w, &e); } } } /*! Returns a list of the top-level widgets (windows) in the application. \note Some of the top-level widgets may be hidden, for example a tooltip if no tooltip is currently shown. Example: \snippet doc/src/snippets/code/src_gui_kernel_qapplication.cpp 4 \sa allWidgets(), QWidget::isWindow(), QWidget::isHidden() */ QWidgetList QApplication::topLevelWidgets() { QWidgetList list; QWidgetList all = allWidgets(); for (QWidgetList::ConstIterator it = all.constBegin(); it != all.constEnd(); ++it) { QWidget *w = *it; if (w->isWindow() && w->windowType() != Qt::Desktop) list.append(w); } return list; } /*! Returns a list of all the widgets in the application. The list is empty (QList::isEmpty()) if there are no widgets. \note Some of the widgets may be hidden. Example: \snippet doc/src/snippets/code/src_gui_kernel_qapplication.cpp 5 \sa topLevelWidgets(), QWidget::isVisible() */ QWidgetList QApplication::allWidgets() { if (QWidgetPrivate::allWidgets) return QWidgetPrivate::allWidgets->toList(); return QWidgetList(); } /*! Returns the application widget that has the keyboard input focus, or 0 if no widget in this application has the focus. \sa QWidget::setFocus(), QWidget::hasFocus(), activeWindow(), focusChanged() */ QWidget *QApplication::focusWidget() { return QApplicationPrivate::focus_widget; } void QApplicationPrivate::setFocusWidget(QWidget *focus, Qt::FocusReason reason) { #ifndef QT_NO_GRAPHICSVIEW if (focus && focus->window()->graphicsProxyWidget()) return; #endif hidden_focus_widget = 0; if (focus != focus_widget) { if (focus && focus->isHidden()) { hidden_focus_widget = focus; return; } if (focus && (reason == Qt::BacktabFocusReason || reason == Qt::TabFocusReason) && qt_in_tab_key_event) focus->window()->setAttribute(Qt::WA_KeyboardFocusChange); else if (focus && reason == Qt::ShortcutFocusReason) { focus->window()->setAttribute(Qt::WA_KeyboardFocusChange); } QWidget *prev = focus_widget; focus_widget = focus; #ifndef QT_NO_IM if (prev && ((reason != Qt::PopupFocusReason && reason != Qt::MenuBarFocusReason && prev->testAttribute(Qt::WA_InputMethodEnabled)) // Do reset the input context, in case the new focus widget won't accept keyboard input // or it is not created fully yet. || (focus_widget && (!focus_widget->testAttribute(Qt::WA_InputMethodEnabled) || !focus_widget->testAttribute(Qt::WA_WState_Created))))) { QInputContext *qic = prev->inputContext(); if(qic) { qic->reset(); qic->setFocusWidget(0); } } #endif //QT_NO_IM if(focus_widget) focus_widget->d_func()->setFocus_sys(); if (reason != Qt::NoFocusReason) { //send events if (prev) { #ifdef QT_KEYPAD_NAVIGATION if (QApplication::keypadNavigationEnabled()) { if (prev->hasEditFocus() && reason != Qt::PopupFocusReason #ifdef Q_OS_SYMBIAN && reason != Qt::ActiveWindowFocusReason #endif ) prev->setEditFocus(false); } #endif QFocusEvent out(QEvent::FocusOut, reason); QPointer that = prev; QApplication::sendEvent(prev, &out); if (that) QApplication::sendEvent(that->style(), &out); } if(focus && QApplicationPrivate::focus_widget == focus) { #ifndef QT_NO_IM if (focus->testAttribute(Qt::WA_InputMethodEnabled)) { QInputContext *qic = focus->inputContext(); if (qic && focus->testAttribute(Qt::WA_WState_Created) && focus->isEnabled()) qic->setFocusWidget(focus); } #endif //QT_NO_IM QFocusEvent in(QEvent::FocusIn, reason); QPointer that = focus; QApplication::sendEvent(focus, &in); if (that) QApplication::sendEvent(that->style(), &in); } emit qApp->focusChanged(prev, focus_widget); } } } /*! Returns the application top-level window that has the keyboard input focus, or 0 if no application window has the focus. There might be an activeWindow() even if there is no focusWidget(), for example if no widget in that window accepts key events. \sa QWidget::setFocus(), QWidget::hasFocus(), focusWidget() */ QWidget *QApplication::activeWindow() { return QApplicationPrivate::active_window; } /*! Returns display (screen) font metrics for the application font. \sa font(), setFont(), QWidget::fontMetrics(), QPainter::fontMetrics() */ QFontMetrics QApplication::fontMetrics() { return desktop()->fontMetrics(); } /*! Closes all top-level windows. This function is particularly useful for applications with many top-level windows. It could, for example, be connected to a \gui{Exit} entry in the \gui{File} menu: \snippet examples/mainwindows/mdi/mainwindow.cpp 0 The windows are closed in random order, until one window does not accept the close event. The application quits when the last window was successfully closed; this can be turned off by setting \l quitOnLastWindowClosed to false. \sa quitOnLastWindowClosed, lastWindowClosed(), QWidget::close(), QWidget::closeEvent(), lastWindowClosed(), quit(), topLevelWidgets(), QWidget::isWindow() */ void QApplication::closeAllWindows() { bool did_close = true; QWidget *w; while ((w = activeModalWidget()) && did_close) { if (!w->isVisible() || w->data->is_closing) break; did_close = w->close(); } QWidgetList list = QApplication::topLevelWidgets(); for (int i = 0; did_close && i < list.size(); ++i) { w = list.at(i); if (w->isVisible() && w->windowType() != Qt::Desktop && !w->data->is_closing) { did_close = w->close(); list = QApplication::topLevelWidgets(); i = -1; } } } /*! Displays a simple message box about Qt. The message includes the version number of Qt being used by the application. This is useful for inclusion in the \gui Help menu of an application, as shown in the \l{mainwindows/menus}{Menus} example. This function is a convenience slot for QMessageBox::aboutQt(). */ void QApplication::aboutQt() { #ifndef QT_NO_MESSAGEBOX QMessageBox::aboutQt( #ifdef Q_WS_MAC 0 #else activeWindow() #endif // Q_WS_MAC ); #endif // QT_NO_MESSAGEBOX } /*! \fn void QApplication::lastWindowClosed() This signal is emitted from QApplication::exec() when the last visible primary window (i.e. window with no parent) with the Qt::WA_QuitOnClose attribute set is closed. By default, \list \o this attribute is set for all widgets except transient windows such as splash screens, tool windows, and popup menus \o QApplication implicitly quits when this signal is emitted. \endlist This feature can be turned off by setting \l quitOnLastWindowClosed to false. \sa QWidget::close() */ /*! \since 4.1 \fn void QApplication::focusChanged(QWidget *old, QWidget *now) This signal is emitted when the widget that has keyboard focus changed from \a old to \a now, i.e., because the user pressed the tab-key, clicked into a widget or changed the active window. Both \a old and \a now can be the null-pointer. The signal is emitted after both widget have been notified about the change through QFocusEvent. \sa QWidget::setFocus(), QWidget::clearFocus(), Qt::FocusReason */ /*!\reimp */ bool QApplication::event(QEvent *e) { Q_D(QApplication); if(e->type() == QEvent::Close) { #if defined(Q_OS_SYMBIAN) // In order to have proper application-exit effects on Symbian, certain // native APIs have to be called _before_ closing/destroying the widgets. bool effectStarted = qt_beginFullScreenEffect(); #endif QCloseEvent *ce = static_cast(e); ce->accept(); closeAllWindows(); QWidgetList list = topLevelWidgets(); for (int i = 0; i < list.size(); ++i) { QWidget *w = list.at(i); if (w->isVisible() && !(w->windowType() == Qt::Desktop) && !(w->windowType() == Qt::Popup) && (!(w->windowType() == Qt::Dialog) || !w->parentWidget())) { ce->ignore(); break; } } if (ce->isAccepted()) { return true; } else { #if defined(Q_OS_SYMBIAN) if (effectStarted) qt_abortFullScreenEffect(); #endif } #ifndef Q_OS_WIN } else if (e->type() == QEvent::LocaleChange) { // on Windows the event propagation is taken care by the // WM_SETTINGCHANGE event handler. QWidgetList list = topLevelWidgets(); for (int i = 0; i < list.size(); ++i) { QWidget *w = list.at(i); if (!(w->windowType() == Qt::Desktop)) { if (!w->testAttribute(Qt::WA_SetLocale)) w->d_func()->setLocale_helper(QLocale(), true); } } #endif } else if (e->type() == QEvent::Timer) { QTimerEvent *te = static_cast(e); Q_ASSERT(te != 0); if (te->timerId() == d->toolTipWakeUp.timerId()) { d->toolTipWakeUp.stop(); if (d->toolTipWidget) { QWidget *w = d->toolTipWidget->window(); // show tooltip if WA_AlwaysShowToolTips is set, or if // any ancestor of d->toolTipWidget is the active // window bool showToolTip = w->testAttribute(Qt::WA_AlwaysShowToolTips); while (w && !showToolTip) { showToolTip = w->isActiveWindow(); w = w->parentWidget(); w = w ? w->window() : 0; } if (showToolTip) { QHelpEvent e(QEvent::ToolTip, d->toolTipPos, d->toolTipGlobalPos); QApplication::sendEvent(d->toolTipWidget, &e); if (e.isAccepted()) d->toolTipFallAsleep.start(2000, this); } } } else if (te->timerId() == d->toolTipFallAsleep.timerId()) { d->toolTipFallAsleep.stop(); } } return QApplicationBase::event(e); if(e->type() == QEvent::LanguageChange) { #if defined(QT_MAC_USE_COCOA) qt_mac_post_retranslateAppMenu(); #endif QWidgetList list = topLevelWidgets(); for (int i = 0; i < list.size(); ++i) { QWidget *w = list.at(i); if (!(w->windowType() == Qt::Desktop)) postEvent(w, new QEvent(QEvent::LanguageChange)); } } } #if !defined(Q_WS_X11) // The doc and X implementation of this function is in qapplication_x11.cpp void QApplication::syncX() {} // do nothing #endif void QApplicationPrivate::notifyLayoutDirectionChange() { Q_Q(QApplication); QWidgetList list = q->topLevelWidgets(); for (int i = 0; i < list.size(); ++i) { QWidget *w = list.at(i); QEvent ev(QEvent::ApplicationLayoutDirectionChange); q->sendEvent(w, &ev); } } /*! \fn Qt::WindowsVersion QApplication::winVersion() Use \l QSysInfo::WindowsVersion instead. */ /*! \fn void QApplication::setActiveWindow(QWidget* active) Sets the active window to the \a active widget in response to a system event. The function is called from the platform specific event handlers. \warning This function does \e not set the keyboard focus to the active widget. Call QWidget::activateWindow() instead. It sets the activeWindow() and focusWidget() attributes and sends proper \l{QEvent::WindowActivate}{WindowActivate}/\l{QEvent::WindowDeactivate} {WindowDeactivate} and \l{QEvent::FocusIn}{FocusIn}/\l{QEvent::FocusOut} {FocusOut} events to all appropriate widgets. The window will then be painted in active state (e.g. cursors in line edits will blink), and it will have tool tips enabled. \sa activeWindow(), QWidget::activateWindow() */ void QApplication::setActiveWindow(QWidget* act) { QWidget* window = act?act->window():0; if (QApplicationPrivate::active_window == window) return; #ifndef QT_NO_GRAPHICSVIEW if (window && window->graphicsProxyWidget()) { // Activate the proxy's view->viewport() ? return; } #endif QWidgetList toBeActivated; QWidgetList toBeDeactivated; if (QApplicationPrivate::active_window) { if (style()->styleHint(QStyle::SH_Widget_ShareActivation, 0, QApplicationPrivate::active_window)) { QWidgetList list = topLevelWidgets(); for (int i = 0; i < list.size(); ++i) { QWidget *w = list.at(i); if (w->isVisible() && w->isActiveWindow()) toBeDeactivated.append(w); } } else { toBeDeactivated.append(QApplicationPrivate::active_window); } } #if !defined(Q_WS_MAC) QWidget *previousActiveWindow = QApplicationPrivate::active_window; #endif QApplicationPrivate::active_window = window; if (QApplicationPrivate::active_window) { if (style()->styleHint(QStyle::SH_Widget_ShareActivation, 0, QApplicationPrivate::active_window)) { QWidgetList list = topLevelWidgets(); for (int i = 0; i < list.size(); ++i) { QWidget *w = list.at(i); if (w->isVisible() && w->isActiveWindow()) toBeActivated.append(w); } } else { toBeActivated.append(QApplicationPrivate::active_window); } } // first the activation/deactivation events QEvent activationChange(QEvent::ActivationChange); QEvent windowActivate(QEvent::WindowActivate); QEvent windowDeactivate(QEvent::WindowDeactivate); #if !defined(Q_WS_MAC) if (!previousActiveWindow) { QEvent appActivate(QEvent::ApplicationActivate); sendSpontaneousEvent(qApp, &appActivate); } #endif for (int i = 0; i < toBeActivated.size(); ++i) { QWidget *w = toBeActivated.at(i); sendSpontaneousEvent(w, &windowActivate); sendSpontaneousEvent(w, &activationChange); } #ifdef QT_MAC_USE_COCOA // In case the user clicked on a child window, we need to // reestablish the stacking order of the window so // it pops in front of other child windows in cocoa: qt_cocoaStackChildWindowOnTopOfOtherChildren(window); #endif for(int i = 0; i < toBeDeactivated.size(); ++i) { QWidget *w = toBeDeactivated.at(i); sendSpontaneousEvent(w, &windowDeactivate); sendSpontaneousEvent(w, &activationChange); } #if !defined(Q_WS_MAC) if (!QApplicationPrivate::active_window) { QEvent appDeactivate(QEvent::ApplicationDeactivate); sendSpontaneousEvent(qApp, &appDeactivate); } #endif if (QApplicationPrivate::popupWidgets == 0) { // !inPopupMode() // then focus events if (!QApplicationPrivate::active_window && QApplicationPrivate::focus_widget) { QApplicationPrivate::setFocusWidget(0, Qt::ActiveWindowFocusReason); } else if (QApplicationPrivate::active_window) { QWidget *w = QApplicationPrivate::active_window->focusWidget(); if (w && w->isVisible() /*&& w->focusPolicy() != QWidget::NoFocus*/) w->setFocus(Qt::ActiveWindowFocusReason); else { w = QApplicationPrivate::focusNextPrevChild_helper(QApplicationPrivate::active_window, true); if (w) { w->setFocus(Qt::ActiveWindowFocusReason); } else { // If the focus widget is not in the activate_window, clear the focus w = QApplicationPrivate::focus_widget; if (!w && QApplicationPrivate::active_window->focusPolicy() != Qt::NoFocus) QApplicationPrivate::setFocusWidget(QApplicationPrivate::active_window, Qt::ActiveWindowFocusReason); else if (!QApplicationPrivate::active_window->isAncestorOf(w)) QApplicationPrivate::setFocusWidget(0, Qt::ActiveWindowFocusReason); } } } } } /*!internal * Helper function that returns the new focus widget, but does not set the focus reason. * Returns 0 if a new focus widget could not be found. * Shared with QGraphicsProxyWidgetPrivate::findFocusChild() */ QWidget *QApplicationPrivate::focusNextPrevChild_helper(QWidget *toplevel, bool next) { uint focus_flag = qt_tab_all_widgets ? Qt::TabFocus : Qt::StrongFocus; QWidget *f = toplevel->focusWidget(); if (!f) f = toplevel; QWidget *w = f; QWidget *test = f->d_func()->focus_next; while (test && test != f) { if ((test->focusPolicy() & focus_flag) == focus_flag && !(test->d_func()->extra && test->d_func()->extra->focus_proxy) && test->isVisibleTo(toplevel) && test->isEnabled() && !(w->windowType() == Qt::SubWindow && !w->isAncestorOf(test)) && (toplevel->windowType() != Qt::SubWindow || toplevel->isAncestorOf(test))) { w = test; if (next) break; } test = test->d_func()->focus_next; } if (w == f) { if (qt_in_tab_key_event) { w->window()->setAttribute(Qt::WA_KeyboardFocusChange); w->update(); } return 0; } return w; } /*! \fn void QApplicationPrivate::dispatchEnterLeave(QWidget* enter, QWidget* leave) \internal Creates the proper Enter/Leave event when widget \a enter is entered and widget \a leave is left. */ void QApplicationPrivate::dispatchEnterLeave(QWidget* enter, QWidget* leave) { #if 0 if (leave) { QEvent e(QEvent::Leave); QApplication::sendEvent(leave, & e); } if (enter) { QEvent e(QEvent::Enter); QApplication::sendEvent(enter, & e); } return; #endif QWidget* w ; if ((!enter && !leave) || (enter == leave)) return; #ifdef ALIEN_DEBUG qDebug() << "QApplicationPrivate::dispatchEnterLeave, ENTER:" << enter << "LEAVE:" << leave; #endif QWidgetList leaveList; QWidgetList enterList; bool sameWindow = leave && enter && leave->window() == enter->window(); if (leave && !sameWindow) { w = leave; do { leaveList.append(w); } while (!w->isWindow() && (w = w->parentWidget())); } if (enter && !sameWindow) { w = enter; do { enterList.prepend(w); } while (!w->isWindow() && (w = w->parentWidget())); } if (sameWindow) { int enterDepth = 0; int leaveDepth = 0; w = enter; while (!w->isWindow() && (w = w->parentWidget())) enterDepth++; w = leave; while (!w->isWindow() && (w = w->parentWidget())) leaveDepth++; QWidget* wenter = enter; QWidget* wleave = leave; while (enterDepth > leaveDepth) { wenter = wenter->parentWidget(); enterDepth--; } while (leaveDepth > enterDepth) { wleave = wleave->parentWidget(); leaveDepth--; } while (!wenter->isWindow() && wenter != wleave) { wenter = wenter->parentWidget(); wleave = wleave->parentWidget(); } w = leave; while (w != wleave) { leaveList.append(w); w = w->parentWidget(); } w = enter; while (w != wenter) { enterList.prepend(w); w = w->parentWidget(); } } QEvent leaveEvent(QEvent::Leave); for (int i = 0; i < leaveList.size(); ++i) { w = leaveList.at(i); if (!QApplication::activeModalWidget() || QApplicationPrivate::tryModalHelper(w, 0)) { #if defined(Q_WS_WIN) || defined(Q_WS_X11) || defined(Q_WS_MAC) if (leaveAfterRelease == w) leaveAfterRelease = 0; #endif QApplication::sendEvent(w, &leaveEvent); if (w->testAttribute(Qt::WA_Hover) && (!QApplication::activePopupWidget() || QApplication::activePopupWidget() == w->window())) { Q_ASSERT(instance()); QHoverEvent he(QEvent::HoverLeave, QPoint(-1, -1), w->mapFromGlobal(QApplicationPrivate::instance()->hoverGlobalPos), QApplication::keyboardModifiers()); qApp->d_func()->notify_helper(w, &he); } } } QPoint posEnter = QCursor::pos(); QEvent enterEvent(QEvent::Enter); for (int i = 0; i < enterList.size(); ++i) { w = enterList.at(i); if (!QApplication::activeModalWidget() || QApplicationPrivate::tryModalHelper(w, 0)) { QApplication::sendEvent(w, &enterEvent); if (w->testAttribute(Qt::WA_Hover) && (!QApplication::activePopupWidget() || QApplication::activePopupWidget() == w->window())) { QHoverEvent he(QEvent::HoverEnter, w->mapFromGlobal(posEnter), QPoint(-1, -1), QApplication::keyboardModifiers()); qApp->d_func()->notify_helper(w, &he); } } } #ifndef QT_NO_CURSOR // Update cursor for alien/graphics widgets. const bool enterOnAlien = (enter && (isAlien(enter) || enter->testAttribute(Qt::WA_DontShowOnScreen))); #if defined(Q_WS_X11) || defined(Q_WS_QPA) //Whenever we leave an alien widget on X11, we need to reset its nativeParentWidget()'s cursor. // This is not required on Windows as the cursor is reset on every single mouse move. QWidget *parentOfLeavingCursor = 0; for (int i = 0; i < leaveList.size(); ++i) { w = leaveList.at(i); if (!isAlien(w)) break; if (w->testAttribute(Qt::WA_SetCursor)) { QWidget *parent = w->parentWidget(); while (parent && parent->d_func()->data.in_destructor) parent = parent->parentWidget(); parentOfLeavingCursor = parent; //continue looping, we need to find the downest alien widget with a cursor. // (downest on the screen) } } //check that we will not call qt_x11_enforce_cursor twice with the same native widget if (parentOfLeavingCursor && (!enterOnAlien || parentOfLeavingCursor->effectiveWinId() != enter->effectiveWinId())) { #ifndef QT_NO_GRAPHICSVIEW if (!parentOfLeavingCursor->window()->graphicsProxyWidget()) #endif { #if defined(Q_WS_X11) qt_x11_enforce_cursor(parentOfLeavingCursor,true); #elif defined(Q_WS_QPA) if (enter == QApplication::desktop()) { qt_qpa_set_cursor(enter, true); } else { qt_qpa_set_cursor(parentOfLeavingCursor, true); } #endif } } #endif if (enterOnAlien) { QWidget *cursorWidget = enter; while (!cursorWidget->isWindow() && !cursorWidget->isEnabled()) cursorWidget = cursorWidget->parentWidget(); if (!cursorWidget) return; #ifndef QT_NO_GRAPHICSVIEW if (cursorWidget->window()->graphicsProxyWidget()) { QWidgetPrivate::nearestGraphicsProxyWidget(cursorWidget)->setCursor(cursorWidget->cursor()); } else #endif { #if defined(Q_WS_WIN) qt_win_set_cursor(cursorWidget, true); #elif defined(Q_WS_X11) qt_x11_enforce_cursor(cursorWidget, true); #elif defined(Q_OS_SYMBIAN) qt_symbian_set_cursor(cursorWidget, true); #elif defined(Q_WS_QPA) qt_qpa_set_cursor(cursorWidget, true); #endif } } #endif } /* exported for the benefit of testing tools */ Q_WIDGETS_EXPORT bool qt_tryModalHelper(QWidget *widget, QWidget **rettop) { return QApplicationPrivate::tryModalHelper(widget, rettop); } /*! \internal Returns true if \a widget is blocked by a modal window. */ bool QApplicationPrivate::isBlockedByModal(QWidget *widget) { widget = widget->window(); if (!modalState()) return false; if (QApplication::activePopupWidget() == widget) return false; for (int i = 0; i < qt_modal_stack->size(); ++i) { QWidget *modalWidget = qt_modal_stack->at(i); { // check if the active modal widget is our widget or a parent of our widget QWidget *w = widget; while (w) { if (w == modalWidget) return false; w = w->parentWidget(); } #ifdef Q_WS_WIN if ((widget->testAttribute(Qt::WA_WState_Created) || widget->data->winid) && (modalWidget->testAttribute(Qt::WA_WState_Created) || modalWidget->data->winid) && IsChild(modalWidget->data->winid, widget->data->winid)) return false; #endif } Qt::WindowModality windowModality = modalWidget->windowModality(); if (windowModality == Qt::NonModal) { // determine the modality type if it hasn't been set on the // modalWidget, this normally happens when waiting for a // native dialog. use WindowModal if we are the child of a // group leader; otherwise use ApplicationModal. QWidget *m = modalWidget; while (m && !m->testAttribute(Qt::WA_GroupLeader)) { m = m->parentWidget(); if (m) m = m->window(); } windowModality = (m && m->testAttribute(Qt::WA_GroupLeader)) ? Qt::WindowModal : Qt::ApplicationModal; } switch (windowModality) { case Qt::ApplicationModal: { QWidget *groupLeaderForWidget = widget; while (groupLeaderForWidget && !groupLeaderForWidget->testAttribute(Qt::WA_GroupLeader)) groupLeaderForWidget = groupLeaderForWidget->parentWidget(); if (groupLeaderForWidget) { // if \a widget has WA_GroupLeader, it can only be blocked by ApplicationModal children QWidget *m = modalWidget; while (m && m != groupLeaderForWidget && !m->testAttribute(Qt::WA_GroupLeader)) m = m->parentWidget(); if (m == groupLeaderForWidget) return true; } else if (modalWidget != widget) { return true; } break; } case Qt::WindowModal: { QWidget *w = widget; do { QWidget *m = modalWidget; do { if (m == w) return true; m = m->parentWidget(); if (m) m = m->window(); } while (m); w = w->parentWidget(); if (w) w = w->window(); } while (w); break; } default: Q_ASSERT_X(false, "QApplication", "internal error, a modal widget cannot be modeless"); break; } } return false; } /*!\internal */ void QApplicationPrivate::enterModal(QWidget *widget) { QSet blocked; QList windows = QApplication::topLevelWidgets(); for (int i = 0; i < windows.count(); ++i) { QWidget *window = windows.at(i); if (window->windowType() != Qt::Tool && isBlockedByModal(window)) blocked.insert(window); } enterModal_sys(widget); windows = QApplication::topLevelWidgets(); QEvent e(QEvent::WindowBlocked); for (int i = 0; i < windows.count(); ++i) { QWidget *window = windows.at(i); if (!blocked.contains(window) && window->windowType() != Qt::Tool && isBlockedByModal(window)) QApplication::sendEvent(window, &e); } } /*!\internal */ void QApplicationPrivate::leaveModal(QWidget *widget) { QSet blocked; QList windows = QApplication::topLevelWidgets(); for (int i = 0; i < windows.count(); ++i) { QWidget *window = windows.at(i); if (window->windowType() != Qt::Tool && isBlockedByModal(window)) blocked.insert(window); } leaveModal_sys(widget); windows = QApplication::topLevelWidgets(); QEvent e(QEvent::WindowUnblocked); for (int i = 0; i < windows.count(); ++i) { QWidget *window = windows.at(i); if(blocked.contains(window) && window->windowType() != Qt::Tool && !isBlockedByModal(window)) QApplication::sendEvent(window, &e); } } /*!\internal Called from qapplication_\e{platform}.cpp, returns true if the widget should accept the event. */ bool QApplicationPrivate::tryModalHelper(QWidget *widget, QWidget **rettop) { QWidget *top = QApplication::activeModalWidget(); if (rettop) *rettop = top; // the active popup widget always gets the input event if (QApplication::activePopupWidget()) return true; #if defined(Q_WS_MAC) && defined(QT_MAC_USE_COCOA) top = QApplicationPrivate::tryModalHelper_sys(top); if (rettop) *rettop = top; #endif return !isBlockedByModal(widget->window()); } /* \internal */ QWidget *QApplicationPrivate::pickMouseReceiver(QWidget *candidate, const QPoint &globalPos, QPoint &pos, QEvent::Type type, Qt::MouseButtons buttons, QWidget *buttonDown, QWidget *alienWidget) { Q_ASSERT(candidate); QWidget *mouseGrabber = QWidget::mouseGrabber(); if (((type == QEvent::MouseMove && buttons) || (type == QEvent::MouseButtonRelease)) && !buttonDown && !mouseGrabber) { return 0; } if (alienWidget && alienWidget->internalWinId()) alienWidget = 0; QWidget *receiver = candidate; if (!mouseGrabber) mouseGrabber = (buttonDown && !isBlockedByModal(buttonDown)) ? buttonDown : alienWidget; if (mouseGrabber && mouseGrabber != candidate) { receiver = mouseGrabber; pos = receiver->mapFromGlobal(globalPos); #ifdef ALIEN_DEBUG qDebug() << " ** receiver adjusted to:" << receiver << "pos:" << pos; #endif } return receiver; } /* \internal */ bool QApplicationPrivate::sendMouseEvent(QWidget *receiver, QMouseEvent *event, QWidget *alienWidget, QWidget *nativeWidget, QWidget **buttonDown, QPointer &lastMouseReceiver, bool spontaneous) { Q_ASSERT(receiver); Q_ASSERT(event); Q_ASSERT(nativeWidget); Q_ASSERT(buttonDown); if (alienWidget && !isAlien(alienWidget)) alienWidget = 0; QPointer receiverGuard = receiver; QPointer nativeGuard = nativeWidget; QPointer alienGuard = alienWidget; QPointer activePopupWidget = QApplication::activePopupWidget(); const bool graphicsWidget = nativeWidget->testAttribute(Qt::WA_DontShowOnScreen); if (*buttonDown) { if (!graphicsWidget) { // Register the widget that shall receive a leave event // after the last button is released. if ((alienWidget || !receiver->internalWinId()) && !leaveAfterRelease && !QWidget::mouseGrabber()) leaveAfterRelease = *buttonDown; if (event->type() == QEvent::MouseButtonRelease && !event->buttons()) *buttonDown = 0; } } else if (lastMouseReceiver) { // Dispatch enter/leave if we move: // 1) from an alien widget to another alien widget or // from a native widget to an alien widget (first OR case) // 2) from an alien widget to a native widget (second OR case) if ((alienWidget && alienWidget != lastMouseReceiver) || (isAlien(lastMouseReceiver) && !alienWidget)) { if (activePopupWidget) { if (!QWidget::mouseGrabber()) dispatchEnterLeave(alienWidget ? alienWidget : nativeWidget, lastMouseReceiver); } else { dispatchEnterLeave(receiver, lastMouseReceiver); } } } #ifdef ALIEN_DEBUG qDebug() << "QApplicationPrivate::sendMouseEvent: receiver:" << receiver << "pos:" << event->pos() << "alien" << alienWidget << "button down" << *buttonDown << "last" << lastMouseReceiver << "leave after release" << leaveAfterRelease; #endif // We need this quard in case someone opens a modal dialog / popup. If that's the case // leaveAfterRelease is set to null, but we shall not update lastMouseReceiver. const bool wasLeaveAfterRelease = leaveAfterRelease != 0; bool result; if (spontaneous) result = QApplication::sendSpontaneousEvent(receiver, event); else result = QApplication::sendEvent(receiver, event); if (!graphicsWidget && leaveAfterRelease && event->type() == QEvent::MouseButtonRelease && !event->buttons() && QWidget::mouseGrabber() != leaveAfterRelease) { // Dispatch enter/leave if: // 1) the mouse grabber is an alien widget // 2) the button is released on an alien widget QWidget *enter = 0; if (nativeGuard) enter = alienGuard ? alienWidget : nativeWidget; else // The receiver is typically deleted on mouse release with drag'n'drop. enter = QApplication::widgetAt(event->globalPos()); dispatchEnterLeave(enter, leaveAfterRelease); leaveAfterRelease = 0; lastMouseReceiver = enter; } else if (!wasLeaveAfterRelease) { if (activePopupWidget) { if (!QWidget::mouseGrabber()) lastMouseReceiver = alienGuard ? alienWidget : (nativeGuard ? nativeWidget : 0); } else { lastMouseReceiver = receiverGuard ? receiver : QApplication::widgetAt(event->globalPos()); } } return result; } #if defined(Q_WS_WIN) || defined(Q_WS_X11) || defined(Q_WS_QWS) || defined(Q_WS_MAC) || defined(Q_WS_QPA) /* This function should only be called when the widget changes visibility, i.e. when the \a widget is shown, hidden or deleted. This function does nothing if the widget is a top-level or native, i.e. not an alien widget. In that case enter/leave events are genereated by the underlying windowing system. */ extern QPointer qt_last_mouse_receiver; extern QWidget *qt_button_down; void QApplicationPrivate::sendSyntheticEnterLeave(QWidget *widget) { #ifndef QT_NO_CURSOR #if defined(Q_WS_QWS) || defined(Q_WS_QPA) if (!widget || widget->isWindow()) return; #else if (!widget || widget->internalWinId() || widget->isWindow()) return; #endif const bool widgetInShow = widget->isVisible() && !widget->data->in_destructor; if (!widgetInShow && widget != qt_last_mouse_receiver) return; // Widget was not under the cursor when it was hidden/deleted. if (widgetInShow && widget->parentWidget()->data->in_show) return; // Ingore recursive show. QWidget *mouseGrabber = QWidget::mouseGrabber(); if (mouseGrabber && mouseGrabber != widget) return; // Someone else has the grab; enter/leave should not occur. QWidget *tlw = widget->window(); if (tlw->data->in_destructor || tlw->data->is_closing) return; // Closing down the business. if (widgetInShow && (!qt_last_mouse_receiver || qt_last_mouse_receiver->window() != tlw)) return; // Mouse cursor not inside the widget's top-level. const QPoint globalPos(QCursor::pos()); QPoint windowPos = tlw->mapFromGlobal(globalPos); // Find the current widget under the mouse. If this function was called from // the widget's destructor, we have to make sure childAt() doesn't take into // account widgets that are about to be destructed. QWidget *widgetUnderCursor = tlw->d_func()->childAt_helper(windowPos, widget->data->in_destructor); if (!widgetUnderCursor) widgetUnderCursor = tlw; QPoint pos = widgetUnderCursor->mapFrom(tlw, windowPos); if (widgetInShow && widgetUnderCursor != widget && !widget->isAncestorOf(widgetUnderCursor)) return; // Mouse cursor not inside the widget or any of its children. if (widget->data->in_destructor && qt_button_down == widget) qt_button_down = 0; // Send enter/leave events followed by a mouse move on the entered widget. QMouseEvent e(QEvent::MouseMove, pos, windowPos, globalPos, Qt::NoButton, Qt::NoButton, Qt::NoModifier); sendMouseEvent(widgetUnderCursor, &e, widgetUnderCursor, tlw, &qt_button_down, qt_last_mouse_receiver); #endif // QT_NO_CURSOR } #endif // Q_WS_WIN || Q_WS_X11 || Q_WS_MAC /*! Returns the desktop widget (also called the root window). The desktop may be composed of multiple screens, so it would be incorrect, for example, to attempt to \e center some widget in the desktop's geometry. QDesktopWidget has various functions for obtaining useful geometries upon the desktop, such as QDesktopWidget::screenGeometry() and QDesktopWidget::availableGeometry(). On X11, it is also possible to draw on the desktop. */ QDesktopWidget *QApplication::desktop() { if (!qt_desktopWidget || // not created yet !(qt_desktopWidget->windowType() == Qt::Desktop)) { // reparented away qt_desktopWidget = new QDesktopWidget(); } return qt_desktopWidget; } #if !defined(Q_WS_QPA) && !defined(QT_NO_CLIPBOARD) /*! Returns a pointer to the application global clipboard. \note The QApplication object should already be constructed before accessing the clipboard. */ QClipboard *QApplication::clipboard() { if (qt_clipboard == 0) { if (!qApp) { qWarning("QApplication: Must construct a QApplication before accessing a QClipboard"); return 0; } qt_clipboard = new QClipboard(0); } return qt_clipboard; } #endif // Q_WS_QPA && QT_NO_CLIPBOARD /*! Sets whether Qt should use the system's standard colors, fonts, etc., to \a on. By default, this is true. This function must be called before creating the QApplication object, like this: \snippet doc/src/snippets/code/src_gui_kernel_qapplication.cpp 6 \sa desktopSettingsAware() */ void QApplication::setDesktopSettingsAware(bool on) { QApplicationPrivate::obey_desktop_settings = on; } /*! Returns true if Qt is set to use the system's standard colors, fonts, etc.; otherwise returns false. The default is true. \sa setDesktopSettingsAware() */ bool QApplication::desktopSettingsAware() { return QApplicationPrivate::obey_desktop_settings; } /*! Returns the current state of the modifier keys on the keyboard. The current state is updated sychronously as the event queue is emptied of events that will spontaneously change the keyboard state (QEvent::KeyPress and QEvent::KeyRelease events). It should be noted this may not reflect the actual keys held on the input device at the time of calling but rather the modifiers as last reported in one of the above events. If no keys are being held Qt::NoModifier is returned. \sa mouseButtons(), queryKeyboardModifiers() */ Qt::KeyboardModifiers QApplication::keyboardModifiers() { return QApplicationPrivate::modifier_buttons; } /*! \fn Qt::KeyboardModifiers QApplication::queryKeyboardModifiers() Queries and returns the state of the modifier keys on the keyboard. Unlike keyboardModifiers, this method returns the actual keys held on the input device at the time of calling the method. It does not rely on the keypress events having been received by this process, which makes it possible to check the modifiers while moving a window, for instance. Note that in most cases, you should use keyboardModifiers(), which is faster and more accurate since it contains the state of the modifiers as they were when the currently processed event was received. \sa keyboardModifiers() \since 4.8 */ Qt::KeyboardModifiers QApplication::queryKeyboardModifiers() { qWarning("queryKeyboardModifiers() doesn't have a QPA implementation"); return QApplicationPrivate::modifier_buttons; } /*! Returns the current state of the buttons on the mouse. The current state is updated syncronously as the event queue is emptied of events that will spontaneously change the mouse state (QEvent::MouseButtonPress and QEvent::MouseButtonRelease events). It should be noted this may not reflect the actual buttons held on the input device at the time of calling but rather the mouse buttons as last reported in one of the above events. If no mouse buttons are being held Qt::NoButton is returned. \sa keyboardModifiers() */ Qt::MouseButtons QApplication::mouseButtons() { return QApplicationPrivate::mouse_buttons; } /*! \fn bool QApplication::isSessionRestored() const Returns true if the application has been restored from an earlier \l{Session Management}{session}; otherwise returns false. \sa sessionId(), commitData(), saveState() */ /*! \fn QString QApplication::sessionId() const Returns the current \l{Session Management}{session's} identifier. If the application has been restored from an earlier session, this identifier is the same as it was in that previous session. The session identifier is guaranteed to be unique both for different applications and for different instances of the same application. \sa isSessionRestored(), sessionKey(), commitData(), saveState() */ /*! \fn QString QApplication::sessionKey() const Returns the session key in the current \l{Session Management}{session}. If the application has been restored from an earlier session, this key is the same as it was when the previous session ended. The session key changes with every call of commitData() or saveState(). \sa isSessionRestored(), sessionId(), commitData(), saveState() */ #ifndef QT_NO_SESSIONMANAGER bool QApplication::isSessionRestored() const { Q_D(const QApplication); return d->is_session_restored; } QString QApplication::sessionId() const { Q_D(const QApplication); return d->session_id; } QString QApplication::sessionKey() const { Q_D(const QApplication); return d->session_key; } #endif /*! \since 4.2 \fn void QApplication::commitDataRequest(QSessionManager &manager) This signal deals with \l{Session Management}{session management}. It is emitted when the QSessionManager wants the application to commit all its data. Usually this means saving all open files, after getting permission from the user. Furthermore you may want to provide a means by which the user can cancel the shutdown. You should not exit the application within this signal. Instead, the session manager may or may not do this afterwards, depending on the context. \warning Within this signal, no user interaction is possible, \e unless you ask the \a manager for explicit permission. See QSessionManager::allowsInteraction() and QSessionManager::allowsErrorInteraction() for details and example usage. \note You should use Qt::DirectConnection when connecting to this signal. \sa isSessionRestored(), sessionId(), saveState(), {Session Management} */ /*! This function deals with \l{Session Management}{session management}. It is invoked when the QSessionManager wants the application to commit all its data. Usually this means saving all open files, after getting permission from the user. Furthermore you may want to provide a means by which the user can cancel the shutdown. You should not exit the application within this function. Instead, the session manager may or may not do this afterwards, depending on the context. \warning Within this function, no user interaction is possible, \e unless you ask the \a manager for explicit permission. See QSessionManager::allowsInteraction() and QSessionManager::allowsErrorInteraction() for details and example usage. The default implementation requests interaction and sends a close event to all visible top-level widgets. If any event was rejected, the shutdown is canceled. \sa isSessionRestored(), sessionId(), saveState(), {Session Management} */ #ifndef QT_NO_SESSIONMANAGER void QApplication::commitData(QSessionManager& manager ) { emit commitDataRequest(manager); if (manager.allowsInteraction()) { QWidgetList done; QWidgetList list = QApplication::topLevelWidgets(); bool cancelled = false; for (int i = 0; !cancelled && i < list.size(); ++i) { QWidget* w = list.at(i); if (w->isVisible() && !done.contains(w)) { cancelled = !w->close(); if (!cancelled) done.append(w); list = QApplication::topLevelWidgets(); i = -1; } } if (cancelled) manager.cancel(); } } /*! \since 4.2 \fn void QApplication::saveStateRequest(QSessionManager &manager) This signal deals with \l{Session Management}{session management}. It is invoked when the \l{QSessionManager}{session manager} wants the application to preserve its state for a future session. For example, a text editor would create a temporary file that includes the current contents of its edit buffers, the location of the cursor and other aspects of the current editing session. You should never exit the application within this signal. Instead, the session manager may or may not do this afterwards, depending on the context. Futhermore, most session managers will very likely request a saved state immediately after the application has been started. This permits the session manager to learn about the application's restart policy. \warning Within this function, no user interaction is possible, \e unless you ask the \a manager for explicit permission. See QSessionManager::allowsInteraction() and QSessionManager::allowsErrorInteraction() for details. \note You should use Qt::DirectConnection when connecting to this signal. \sa isSessionRestored(), sessionId(), commitData(), {Session Management} */ /*! This function deals with \l{Session Management}{session management}. It is invoked when the \l{QSessionManager}{session manager} wants the application to preserve its state for a future session. For example, a text editor would create a temporary file that includes the current contents of its edit buffers, the location of the cursor and other aspects of the current editing session. You should never exit the application within this function. Instead, the session manager may or may not do this afterwards, depending on the context. Futhermore, most session managers will very likely request a saved state immediately after the application has been started. This permits the session manager to learn about the application's restart policy. \warning Within this function, no user interaction is possible, \e unless you ask the \a manager for explicit permission. See QSessionManager::allowsInteraction() and QSessionManager::allowsErrorInteraction() for details. \sa isSessionRestored(), sessionId(), commitData(), {Session Management} */ void QApplication::saveState(QSessionManager &manager) { emit saveStateRequest(manager); } #endif //QT_NO_SESSIONMANAGER /* Sets the time after which a drag should start to \a ms ms. \sa startDragTime() */ void QApplication::setStartDragTime(int ms) { Q_UNUSED(ms) } /*! \property QApplication::startDragTime \brief the time in milliseconds that a mouse button must be held down before a drag and drop operation will begin If you support drag and drop in your application, and want to start a drag and drop operation after the user has held down a mouse button for a certain amount of time, you should use this property's value as the delay. Qt also uses this delay internally, e.g. in QTextEdit and QLineEdit, for starting a drag. The default value is 500 ms. \sa startDragDistance(), {Drag and Drop} */ int QApplication::startDragTime() { return qApp->styleHints()->startDragTime(); } /* Sets the distance after which a drag should start to \a l pixels. \sa startDragDistance() */ void QApplication::setStartDragDistance(int l) { Q_UNUSED(l); } /*! \property QApplication::startDragDistance If you support drag and drop in your application, and want to start a drag and drop operation after the user has moved the cursor a certain distance with a button held down, you should use this property's value as the minimum distance required. For example, if the mouse position of the click is stored in \c startPos and the current position (e.g. in the mouse move event) is \c currentPos, you can find out if a drag should be started with code like this: \snippet doc/src/snippets/code/src_gui_kernel_qapplication.cpp 7 Qt uses this value internally, e.g. in QFileDialog. The default value is 4 pixels. \sa startDragTime() QPoint::manhattanLength() {Drag and Drop} */ int QApplication::startDragDistance() { return qApp->styleHints()->startDragDistance(); } /*! \fn void QApplication::setReverseLayout(bool reverse) Use setLayoutDirection() instead. */ /*! \fn void QApplication::reverseLayout() Use layoutDirection() instead. */ /*! \obsolete Strips out vertical alignment flags and transforms an alignment \a align of Qt::AlignLeft into Qt::AlignLeft or Qt::AlignRight according to the language used. */ /*! Enters the main event loop and waits until exit() is called, then returns the value that was set to exit() (which is 0 if exit() is called via quit()). It is necessary to call this function to start event handling. The main event loop receives events from the window system and dispatches these to the application widgets. Generally, no user interaction can take place before calling exec(). As a special case, modal widgets like QMessageBox can be used before calling exec(), because modal widgets call exec() to start a local event loop. To make your application perform idle processing, i.e., executing a special function whenever there are no pending events, use a QTimer with 0 timeout. More advanced idle processing schemes can be achieved using processEvents(). We recommend that you connect clean-up code to the \l{QCoreApplication::}{aboutToQuit()} signal, instead of putting it in your application's \c{main()} function. This is because, on some platforms the QApplication::exec() call may not return. For example, on the Windows platform, when the user logs off, the system terminates the process after Qt closes all top-level windows. Hence, there is \e{no guarantee} that the application will have time to exit its event loop and execute code at the end of the \c{main()} function, after the QApplication::exec() call. \sa quitOnLastWindowClosed, quit(), exit(), processEvents(), QCoreApplication::exec() */ int QApplication::exec() { #ifndef QT_NO_ACCESSIBILITY QAccessible::setRootObject(qApp); #endif return QApplicationBase::exec(); } /*! \reimp */ bool QApplication::notify(QObject *receiver, QEvent *e) { Q_D(QApplication); // no events are delivered after ~QCoreApplication() has started if (QApplicationPrivate::is_app_closing) return true; if (receiver == 0) { // serious error qWarning("QApplication::notify: Unexpected null receiver"); return true; } #ifndef QT_NO_DEBUG d->checkReceiverThread(receiver); #endif // capture the current mouse/keyboard state if(e->spontaneous()) { if (e->type() == QEvent::KeyPress || e->type() == QEvent::KeyRelease) { QKeyEvent *ke = static_cast(e); QApplicationPrivate::modifier_buttons = ke->modifiers(); } else if(e->type() == QEvent::MouseButtonPress || e->type() == QEvent::MouseButtonRelease) { QMouseEvent *me = static_cast(e); QApplicationPrivate::modifier_buttons = me->modifiers(); if(me->type() == QEvent::MouseButtonPress) QApplicationPrivate::mouse_buttons |= me->button(); else QApplicationPrivate::mouse_buttons &= ~me->button(); } #if !defined(QT_NO_WHEELEVENT) || !defined(QT_NO_TABLETEVENT) else if (false # ifndef QT_NO_WHEELEVENT || e->type() == QEvent::Wheel # endif # ifndef QT_NO_TABLETEVENT || e->type() == QEvent::TabletMove || e->type() == QEvent::TabletPress || e->type() == QEvent::TabletRelease # endif ) { QInputEvent *ie = static_cast(e); QApplicationPrivate::modifier_buttons = ie->modifiers(); } #endif // !QT_NO_WHEELEVENT || !QT_NO_TABLETEVENT } #ifndef QT_NO_GESTURES // walk through parents and check for gestures if (d->gestureManager) { switch (e->type()) { case QEvent::Paint: case QEvent::MetaCall: case QEvent::DeferredDelete: case QEvent::DragEnter: case QEvent::DragMove: case QEvent::DragLeave: case QEvent::Drop: case QEvent::DragResponse: case QEvent::ChildAdded: case QEvent::ChildPolished: case QEvent::ChildRemoved: case QEvent::UpdateRequest: case QEvent::UpdateLater: case QEvent::AccessibilityPrepare: case QEvent::LocaleChange: case QEvent::Style: case QEvent::IconDrag: case QEvent::StyleChange: case QEvent::AccessibilityHelp: case QEvent::AccessibilityDescription: case QEvent::GraphicsSceneDragEnter: case QEvent::GraphicsSceneDragMove: case QEvent::GraphicsSceneDragLeave: case QEvent::GraphicsSceneDrop: case QEvent::DynamicPropertyChange: case QEvent::NetworkReplyUpdated: break; default: if (receiver->isWidgetType()) { if (d->gestureManager->filterEvent(static_cast(receiver), e)) return true; } else { // a special case for events that go to QGesture objects. // We pass the object to the gesture manager and it'll figure // out if it's QGesture or not. if (d->gestureManager->filterEvent(receiver, e)) return true; } } } #endif // QT_NO_GESTURES // User input and window activation makes tooltips sleep switch (e->type()) { case QEvent::Wheel: case QEvent::ActivationChange: case QEvent::KeyPress: case QEvent::KeyRelease: case QEvent::FocusOut: case QEvent::FocusIn: case QEvent::MouseButtonPress: case QEvent::MouseButtonRelease: case QEvent::MouseButtonDblClick: d->toolTipFallAsleep.stop(); // fall-through case QEvent::Leave: d->toolTipWakeUp.stop(); default: break; } bool res = false; if (!receiver->isWidgetType()) { res = d->notify_helper(receiver, e); } else switch (e->type()) { #if defined QT3_SUPPORT && !defined(QT_NO_SHORTCUT) case QEvent::Accel: { if (d->use_compat()) { QKeyEvent* key = static_cast(e); res = d->notify_helper(receiver, e); if (!res && !key->isAccepted()) res = d->qt_dispatchAccelEvent(static_cast(receiver), key); // next lines are for compatibility with Qt <= 3.0.x: old // QAccel was listening on toplevel widgets if (!res && !key->isAccepted() && !static_cast(receiver)->isWindow()) res = d->notify_helper(static_cast(receiver)->window(), e); } break; } #endif //QT3_SUPPORT && !QT_NO_SHORTCUT case QEvent::ShortcutOverride: case QEvent::KeyPress: case QEvent::KeyRelease: { bool isWidget = receiver->isWidgetType(); bool isGraphicsWidget = false; #ifndef QT_NO_GRAPHICSVIEW isGraphicsWidget = !isWidget && qobject_cast(receiver); #endif if (!isWidget && !isGraphicsWidget) { res = d->notify_helper(receiver, e); break; } QKeyEvent* key = static_cast(e); #if defined QT3_SUPPORT && !defined(QT_NO_SHORTCUT) if (d->use_compat() && d->qt_tryComposeUnicode(static_cast(receiver), key)) break; #endif if (key->type()==QEvent::KeyPress) { #ifndef QT_NO_SHORTCUT // Try looking for a Shortcut before sending key events if ((res = qApp->d_func()->shortcutMap.tryShortcutEvent(receiver, key))) return res; #endif qt_in_tab_key_event = (key->key() == Qt::Key_Backtab || key->key() == Qt::Key_Tab || key->key() == Qt::Key_Left || key->key() == Qt::Key_Up || key->key() == Qt::Key_Right || key->key() == Qt::Key_Down); } bool def = key->isAccepted(); QPointer pr = receiver; while (receiver) { if (def) key->accept(); else key->ignore(); res = d->notify_helper(receiver, e); QWidget *w = isWidget ? static_cast(receiver) : 0; #ifndef QT_NO_GRAPHICSVIEW QGraphicsWidget *gw = isGraphicsWidget ? static_cast(receiver) : 0; #endif if ((res && key->isAccepted()) /* QLineEdit will emit a signal on Key_Return, but ignore the event, and sometimes the connected slot deletes the QLineEdit (common in itemview delegates), so we have to check if the widget was destroyed even if the event was ignored (to prevent a crash) note that we don't have to reset pw while propagating (because the original receiver will be destroyed if one of its ancestors is) */ || !pr || (isWidget && (w->isWindow() || !w->parentWidget())) #ifndef QT_NO_GRAPHICSVIEW || (isGraphicsWidget && (gw->isWindow() || !gw->parentWidget())) #endif ) { break; } #ifndef QT_NO_GRAPHICSVIEW receiver = w ? (QObject *)w->parentWidget() : (QObject *)gw->parentWidget(); #else receiver = w->parentWidget(); #endif } qt_in_tab_key_event = false; } break; case QEvent::MouseButtonPress: case QEvent::MouseButtonRelease: case QEvent::MouseButtonDblClick: case QEvent::MouseMove: { QWidget* w = static_cast(receiver); QMouseEvent* mouse = static_cast(e); QPoint relpos = mouse->pos(); if (e->spontaneous()) { if (e->type() == QEvent::MouseButtonPress) { QApplicationPrivate::giveFocusAccordingToFocusPolicy(w, Qt::ClickFocus, Qt::MouseFocusReason); } // ### Qt 5 These dynamic tool tips should be an OPT-IN feature. Some platforms // like Mac OS X (probably others too), can optimize their views by not // dispatching mouse move events. We have attributes to control hover, // and mouse tracking, but as long as we are deciding to implement this // feature without choice of opting-in or out, you ALWAYS have to have // tracking enabled. Therefore, the other properties give a false sense of // performance enhancement. if (e->type() == QEvent::MouseMove && mouse->buttons() == 0) { d->toolTipWidget = w; d->toolTipPos = relpos; d->toolTipGlobalPos = mouse->globalPos(); d->toolTipWakeUp.start(d->toolTipFallAsleep.isActive()?20:700, this); } } bool eventAccepted = mouse->isAccepted(); QPointer pw = w; while (w) { QMouseEvent me(mouse->type(), relpos, mouse->windowPos(), mouse->globalPos(), mouse->button(), mouse->buttons(), mouse->modifiers()); me.spont = mouse->spontaneous(); me.setTimestamp(mouse->timestamp()); // throw away any mouse-tracking-only mouse events if (!w->hasMouseTracking() && mouse->type() == QEvent::MouseMove && mouse->buttons() == 0) { // but still send them through all application event filters (normally done by notify_helper) for (int i = 0; i < d->eventFilters.size(); ++i) { register QObject *obj = d->eventFilters.at(i); if (!obj) continue; if (obj->d_func()->threadData != w->d_func()->threadData) { qWarning("QApplication: Object event filter cannot be in a different thread."); continue; } if (obj->eventFilter(w, w == receiver ? mouse : &me)) break; } res = true; } else { w->setAttribute(Qt::WA_NoMouseReplay, false); res = d->notify_helper(w, w == receiver ? mouse : &me); e->spont = false; } eventAccepted = (w == receiver ? mouse : &me)->isAccepted(); if (res && eventAccepted) break; if (w->isWindow() || w->testAttribute(Qt::WA_NoMousePropagation)) break; relpos += w->pos(); w = w->parentWidget(); } mouse->setAccepted(eventAccepted); if (e->type() == QEvent::MouseMove) { if (!pw) break; w = static_cast(receiver); relpos = mouse->pos(); QPoint diff = relpos - w->mapFromGlobal(d->hoverGlobalPos); while (w) { if (w->testAttribute(Qt::WA_Hover) && (!QApplication::activePopupWidget() || QApplication::activePopupWidget() == w->window())) { QHoverEvent he(QEvent::HoverMove, relpos, relpos - diff, mouse->modifiers()); d->notify_helper(w, &he); } if (w->isWindow() || w->testAttribute(Qt::WA_NoMousePropagation)) break; relpos += w->pos(); w = w->parentWidget(); } } d->hoverGlobalPos = mouse->globalPos(); } break; #ifndef QT_NO_WHEELEVENT case QEvent::Wheel: { QWidget* w = static_cast(receiver); QWheelEvent* wheel = static_cast(e); QPoint relpos = wheel->pos(); bool eventAccepted = wheel->isAccepted(); if (e->spontaneous()) { QApplicationPrivate::giveFocusAccordingToFocusPolicy(w, Qt::WheelFocus, Qt::MouseFocusReason); } while (w) { QWheelEvent we(relpos, wheel->globalPos(), wheel->delta(), wheel->buttons(), wheel->modifiers(), wheel->orientation()); we.spont = wheel->spontaneous(); res = d->notify_helper(w, w == receiver ? wheel : &we); eventAccepted = ((w == receiver) ? wheel : &we)->isAccepted(); e->spont = false; if ((res && eventAccepted) || w->isWindow() || w->testAttribute(Qt::WA_NoMousePropagation)) break; relpos += w->pos(); w = w->parentWidget(); } wheel->setAccepted(eventAccepted); } break; #endif #ifndef QT_NO_CONTEXTMENU case QEvent::ContextMenu: { QWidget* w = static_cast(receiver); QContextMenuEvent *context = static_cast(e); QPoint relpos = context->pos(); bool eventAccepted = context->isAccepted(); while (w) { QContextMenuEvent ce(context->reason(), relpos, context->globalPos(), context->modifiers()); ce.spont = e->spontaneous(); res = d->notify_helper(w, w == receiver ? context : &ce); eventAccepted = ((w == receiver) ? context : &ce)->isAccepted(); e->spont = false; if ((res && eventAccepted) || w->isWindow() || w->testAttribute(Qt::WA_NoMousePropagation)) break; relpos += w->pos(); w = w->parentWidget(); } context->setAccepted(eventAccepted); } break; #endif // QT_NO_CONTEXTMENU #ifndef QT_NO_TABLETEVENT case QEvent::TabletMove: case QEvent::TabletPress: case QEvent::TabletRelease: { QWidget *w = static_cast(receiver); QTabletEvent *tablet = static_cast(e); QPoint relpos = tablet->pos(); bool eventAccepted = tablet->isAccepted(); while (w) { QTabletEvent te(tablet->type(), relpos, tablet->globalPos(), tablet->hiResGlobalPos(), tablet->device(), tablet->pointerType(), tablet->pressure(), tablet->xTilt(), tablet->yTilt(), tablet->tangentialPressure(), tablet->rotation(), tablet->z(), tablet->modifiers(), tablet->uniqueId()); te.spont = e->spontaneous(); res = d->notify_helper(w, w == receiver ? tablet : &te); eventAccepted = ((w == receiver) ? tablet : &te)->isAccepted(); e->spont = false; if ((res && eventAccepted) || w->isWindow() || w->testAttribute(Qt::WA_NoMousePropagation)) break; relpos += w->pos(); w = w->parentWidget(); } tablet->setAccepted(eventAccepted); qt_tabletChokeMouse = tablet->isAccepted(); } break; #endif // QT_NO_TABLETEVENT #if !defined(QT_NO_TOOLTIP) || !defined(QT_NO_WHATSTHIS) case QEvent::ToolTip: case QEvent::WhatsThis: case QEvent::QueryWhatsThis: { QWidget* w = static_cast(receiver); QHelpEvent *help = static_cast(e); QPoint relpos = help->pos(); bool eventAccepted = help->isAccepted(); while (w) { QHelpEvent he(help->type(), relpos, help->globalPos()); he.spont = e->spontaneous(); res = d->notify_helper(w, w == receiver ? help : &he); e->spont = false; eventAccepted = (w == receiver ? help : &he)->isAccepted(); if ((res && eventAccepted) || w->isWindow()) break; relpos += w->pos(); w = w->parentWidget(); } help->setAccepted(eventAccepted); } break; #endif #if !defined(QT_NO_STATUSTIP) || !defined(QT_NO_WHATSTHIS) case QEvent::StatusTip: case QEvent::WhatsThisClicked: { QWidget *w = static_cast(receiver); while (w) { res = d->notify_helper(w, e); if ((res && e->isAccepted()) || w->isWindow()) break; w = w->parentWidget(); } } break; #endif #ifndef QT_NO_DRAGANDDROP case QEvent::DragEnter: { QWidget* w = static_cast(receiver); QDragEnterEvent *dragEvent = static_cast(e); #ifdef Q_WS_MAC // HIView has a slight difference in how it delivers events to children and parents // It will not give a leave to a child's parent when it enters a child. QWidget *currentTarget = QDragManager::self()->currentTarget(); if (currentTarget) { // Assume currentTarget did not get a leave QDragLeaveEvent event; QApplication::sendEvent(currentTarget, &event); } #endif #ifndef QT_NO_GRAPHICSVIEW // QGraphicsProxyWidget handles its own propagation, // and we must not change QDragManagers currentTarget. QWExtra *extra = w->window()->d_func()->extra; if (extra && extra->proxyWidget) { res = d->notify_helper(w, dragEvent); break; } #endif while (w) { if (w->isEnabled() && w->acceptDrops()) { res = d->notify_helper(w, dragEvent); if (res && dragEvent->isAccepted()) { QDragManager::self()->setCurrentTarget(w); break; } } if (w->isWindow()) break; dragEvent->p = w->mapToParent(dragEvent->p); w = w->parentWidget(); } } break; case QEvent::DragMove: case QEvent::Drop: case QEvent::DragLeave: { QWidget* w = static_cast(receiver); #ifndef QT_NO_GRAPHICSVIEW // QGraphicsProxyWidget handles its own propagation, // and we must not change QDragManagers currentTarget. QWExtra *extra = w->window()->d_func()->extra; bool isProxyWidget = extra && extra->proxyWidget; if (!isProxyWidget) #endif w = qobject_cast(QDragManager::self()->currentTarget()); if (!w) { #ifdef Q_WS_MAC // HIView has a slight difference in how it delivers events to children and parents // It will not give an enter to a child's parent when it leaves the child. if (e->type() == QEvent::DragLeave) break; // Assume that w did not get an enter. QDropEvent *dropEvent = static_cast(e); QDragEnterEvent dragEnterEvent(dropEvent->pos(), dropEvent->possibleActions(), dropEvent->mimeData(), dropEvent->mouseButtons(), dropEvent->keyboardModifiers()); QApplication::sendEvent(receiver, &dragEnterEvent); w = QDragManager::self()->currentTarget(); if (!w) #endif break; } if (e->type() == QEvent::DragMove || e->type() == QEvent::Drop) { QDropEvent *dragEvent = static_cast(e); QWidget *origReciver = static_cast(receiver); while (origReciver && w != origReciver) { dragEvent->p = origReciver->mapToParent(dragEvent->p); origReciver = origReciver->parentWidget(); } } res = d->notify_helper(w, e); if (e->type() != QEvent::DragMove #ifndef QT_NO_GRAPHICSVIEW && !isProxyWidget #endif ) QDragManager::self()->setCurrentTarget(0, e->type() == QEvent::Drop); } break; #endif case QEvent::TouchBegin: // Note: TouchUpdate and TouchEnd events are never propagated { QWidget *widget = static_cast(receiver); QTouchEvent *touchEvent = static_cast(e); bool eventAccepted = touchEvent->isAccepted(); if (widget->testAttribute(Qt::WA_AcceptTouchEvents) && e->spontaneous()) { // give the widget focus if the focus policy allows it QApplicationPrivate::giveFocusAccordingToFocusPolicy(widget, Qt::ClickFocus, Qt::MouseFocusReason); } while (widget) { // first, try to deliver the touch event bool acceptTouchEvents = widget->testAttribute(Qt::WA_AcceptTouchEvents); touchEvent->setWidget(widget); touchEvent->setAccepted(acceptTouchEvents); QWeakPointer p = widget; res = acceptTouchEvents && d->notify_helper(widget, touchEvent); eventAccepted = touchEvent->isAccepted(); if (p.isNull()) { // widget was deleted widget = 0; } else { widget->setAttribute(Qt::WA_WState_AcceptedTouchBeginEvent, res && eventAccepted); } touchEvent->spont = false; if (res && eventAccepted) { // the first widget to accept the TouchBegin gets an implicit grab. for (int i = 0; i < touchEvent->touchPoints().count(); ++i) { const QTouchEvent::TouchPoint &touchPoint = touchEvent->touchPoints().at(i); d->widgetForTouchPointId[touchPoint.id()] = widget; } break; } else if (p.isNull() || widget->isWindow() || widget->testAttribute(Qt::WA_NoMousePropagation)) { break; } QPoint offset = widget->pos(); widget = widget->parentWidget(); touchEvent->setWidget(widget); for (int i = 0; i < touchEvent->_touchPoints.size(); ++i) { QTouchEvent::TouchPoint &pt = touchEvent->_touchPoints[i]; QRectF rect = pt.rect(); rect.moveCenter(offset); pt.d->rect = rect; pt.d->startPos = pt.startPos() + offset; pt.d->lastPos = pt.lastPos() + offset; } } touchEvent->setAccepted(eventAccepted); break; } case QEvent::RequestSoftwareInputPanel: inputPanel()->show(); break; case QEvent::CloseSoftwareInputPanel: inputPanel()->hide(); break; #ifndef QT_NO_GESTURES case QEvent::NativeGesture: { // only propagate the first gesture event (after the GID_BEGIN) QWidget *w = static_cast(receiver); while (w) { e->ignore(); res = d->notify_helper(w, e); if ((res && e->isAccepted()) || w->isWindow()) break; w = w->parentWidget(); } break; } case QEvent::Gesture: case QEvent::GestureOverride: { if (receiver->isWidgetType()) { QWidget *w = static_cast(receiver); QGestureEvent *gestureEvent = static_cast(e); QList allGestures = gestureEvent->gestures(); bool eventAccepted = gestureEvent->isAccepted(); bool wasAccepted = eventAccepted; while (w) { // send only gestures the widget expects QList gestures; QWidgetPrivate *wd = w->d_func(); for (int i = 0; i < allGestures.size();) { QGesture *g = allGestures.at(i); Qt::GestureType type = g->gestureType(); QMap::iterator contextit = wd->gestureContext.find(type); bool deliver = contextit != wd->gestureContext.end() && (g->state() == Qt::GestureStarted || w == receiver || (contextit.value() & Qt::ReceivePartialGestures)); if (deliver) { allGestures.removeAt(i); gestures.append(g); } else { ++i; } } if (!gestures.isEmpty()) { // we have gestures for this w QGestureEvent ge(gestures); ge.t = gestureEvent->t; ge.spont = gestureEvent->spont; ge.m_accept = wasAccepted; ge.d_func()->accepted = gestureEvent->d_func()->accepted; res = d->notify_helper(w, &ge); gestureEvent->spont = false; eventAccepted = ge.isAccepted(); for (int i = 0; i < gestures.size(); ++i) { QGesture *g = gestures.at(i); // Ignore res [event return value] because handling of multiple gestures // packed into a single QEvent depends on not consuming the event if (eventAccepted || ge.isAccepted(g)) { // if the gesture was accepted, mark the target widget for it gestureEvent->d_func()->targetWidgets[g->gestureType()] = w; gestureEvent->setAccepted(g, true); } else { // if the gesture was explicitly ignored by the application, // put it back so a parent can get it allGestures.append(g); } } } if (allGestures.isEmpty()) // everything delivered break; if (w->isWindow()) break; w = w->parentWidget(); } foreach (QGesture *g, allGestures) gestureEvent->setAccepted(g, false); gestureEvent->m_accept = false; // to make sure we check individual gestures } else { res = d->notify_helper(receiver, e); } break; } #endif // QT_NO_GESTURES #ifdef QT_MAC_USE_COCOA case QEvent::Enter: if (receiver->isWidgetType()) { QWidget *w = static_cast(receiver); if (w->testAttribute(Qt::WA_AcceptTouchEvents)) qt_widget_private(w)->registerTouchWindow(true); } res = d->notify_helper(receiver, e); break; case QEvent::Leave: if (receiver->isWidgetType()) { QWidget *w = static_cast(receiver); if (w->testAttribute(Qt::WA_AcceptTouchEvents)) qt_widget_private(w)->registerTouchWindow(false); } res = d->notify_helper(receiver, e); break; #endif default: res = d->notify_helper(receiver, e); break; } return res; } bool QApplicationPrivate::notify_helper(QObject *receiver, QEvent * e) { // send to all application event filters if (sendThroughApplicationEventFilters(receiver, e)) return true; if (receiver->isWidgetType()) { QWidget *widget = static_cast(receiver); #if !defined(Q_WS_WINCE) || (defined(GWES_ICONCURS) && !defined(QT_NO_CURSOR)) // toggle HasMouse widget state on enter and leave if ((e->type() == QEvent::Enter || e->type() == QEvent::DragEnter) && (!QApplication::activePopupWidget() || QApplication::activePopupWidget() == widget->window())) widget->setAttribute(Qt::WA_UnderMouse, true); else if (e->type() == QEvent::Leave || e->type() == QEvent::DragLeave) widget->setAttribute(Qt::WA_UnderMouse, false); #endif if (QLayout *layout=widget->d_func()->layout) { layout->widgetEvent(e); } } // send to all receiver event filters if (sendThroughObjectEventFilters(receiver, e)) return true; // deliver the event bool consumed = receiver->event(e); e->spont = false; return consumed; } /*! \class QSessionManager \brief The QSessionManager class provides access to the session manager. A session manager in a desktop environment (in which Qt GUI applications live) keeps track of a session, which is a group of running applications, each of which has a particular state. The state of an application contains (most notably) the documents the application has open and the position and size of its windows. The session manager is used to save the session, e.g., when the machine is shut down, and to restore a session, e.g., when the machine is started up. We recommend that you use QSettings to save an application's settings, for example, window positions, recently used files, etc. When the application is restarted by the session manager, you can restore the settings. QSessionManager provides an interface between the application and the session manager so that the program can work well with the session manager. In Qt, session management requests for action are handled by the two virtual functions QApplication::commitData() and QApplication::saveState(). Both provide a reference to a session manager object as argument, to allow the application to communicate with the session manager. The session manager can only be accessed through these functions. No user interaction is possible \e unless the application gets explicit permission from the session manager. You ask for permission by calling allowsInteraction() or, if it is really urgent, allowsErrorInteraction(). Qt does not enforce this, but the session manager may. You can try to abort the shutdown process by calling cancel(). The default commitData() function does this if some top-level window rejected its closeEvent(). For sophisticated session managers provided on Unix/X11, QSessionManager offers further possibilities to fine-tune an application's session management behavior: setRestartCommand(), setDiscardCommand(), setRestartHint(), setProperty(), requestPhase2(). See the respective function descriptions for further details. \sa QApplication, {Session Management} */ /*! \enum QSessionManager::RestartHint This enum type defines the circumstances under which this application wants to be restarted by the session manager. The current values are: \value RestartIfRunning If the application is still running when the session is shut down, it wants to be restarted at the start of the next session. \value RestartAnyway The application wants to be started at the start of the next session, no matter what. (This is useful for utilities that run just after startup and then quit.) \value RestartImmediately The application wants to be started immediately whenever it is not running. \value RestartNever The application does not want to be restarted automatically. The default hint is \c RestartIfRunning. */ /*! \fn QString QSessionManager::sessionId() const Returns the identifier of the current session. If the application has been restored from an earlier session, this identifier is the same as it was in the earlier session. \sa sessionKey(), QApplication::sessionId() */ /*! \fn QString QSessionManager::sessionKey() const Returns the session key in the current session. If the application has been restored from an earlier session, this key is the same as it was when the previous session ended. The session key changes with every call of commitData() or saveState(). \sa sessionId(), QApplication::sessionKey() */ /*! \fn void* QSessionManager::handle() const \internal */ /*! \fn bool QSessionManager::allowsInteraction() Asks the session manager for permission to interact with the user. Returns true if interaction is permitted; otherwise returns false. The rationale behind this mechanism is to make it possible to synchronize user interaction during a shutdown. Advanced session managers may ask all applications simultaneously to commit their data, resulting in a much faster shutdown. When the interaction is completed we strongly recommend releasing the user interaction semaphore with a call to release(). This way, other applications may get the chance to interact with the user while your application is still busy saving data. (The semaphore is implicitly released when the application exits.) If the user decides to cancel the shutdown process during the interaction phase, you must tell the session manager that this has happened by calling cancel(). Here's an example of how an application's QApplication::commitData() might be implemented: \snippet doc/src/snippets/code/src_gui_kernel_qapplication.cpp 8 If an error occurred within the application while saving its data, you may want to try allowsErrorInteraction() instead. \sa QApplication::commitData(), release(), cancel() */ /*! \fn bool QSessionManager::allowsErrorInteraction() Returns true if error interaction is permitted; otherwise returns false. This is similar to allowsInteraction(), but also enables the application to tell the user about any errors that occur. Session managers may give error interaction requests higher priority, which means that it is more likely that an error interaction is permitted. However, you are still not guaranteed that the session manager will allow interaction. \sa allowsInteraction(), release(), cancel() */ /*! \fn void QSessionManager::release() Releases the session manager's interaction semaphore after an interaction phase. \sa allowsInteraction(), allowsErrorInteraction() */ /*! \fn void QSessionManager::cancel() Tells the session manager to cancel the shutdown process. Applications should not call this function without asking the user first. \sa allowsInteraction(), allowsErrorInteraction() */ /*! \fn void QSessionManager::setRestartHint(RestartHint hint) Sets the application's restart hint to \a hint. On application startup, the hint is set to \c RestartIfRunning. \note These flags are only hints, a session manager may or may not respect them. We recommend setting the restart hint in QApplication::saveState() because most session managers perform a checkpoint shortly after an application's startup. \sa restartHint() */ /*! \fn QSessionManager::RestartHint QSessionManager::restartHint() const Returns the application's current restart hint. The default is \c RestartIfRunning. \sa setRestartHint() */ /*! \fn void QSessionManager::setRestartCommand(const QStringList& command) If the session manager is capable of restoring sessions it will execute \a command in order to restore the application. The command defaults to \snippet doc/src/snippets/code/src_gui_kernel_qapplication.cpp 9 The \c -session option is mandatory; otherwise QApplication cannot tell whether it has been restored or what the current session identifier is. See QApplication::isSessionRestored() and QApplication::sessionId() for details. If your application is very simple, it may be possible to store the entire application state in additional command line options. This is usually a very bad idea because command lines are often limited to a few hundred bytes. Instead, use QSettings, temporary files, or a database for this purpose. By marking the data with the unique sessionId(), you will be able to restore the application in a future session. \sa restartCommand(), setDiscardCommand(), setRestartHint() */ /*! \fn QStringList QSessionManager::restartCommand() const Returns the currently set restart command. To iterate over the list, you can use the \l foreach pseudo-keyword: \snippet doc/src/snippets/code/src_gui_kernel_qapplication.cpp 10 \sa setRestartCommand(), restartHint() */ /*! \fn void QSessionManager::setDiscardCommand(const QStringList& list) Sets the discard command to the given \a list. \sa discardCommand(), setRestartCommand() */ /*! \fn QStringList QSessionManager::discardCommand() const Returns the currently set discard command. To iterate over the list, you can use the \l foreach pseudo-keyword: \snippet doc/src/snippets/code/src_gui_kernel_qapplication.cpp 11 \sa setDiscardCommand(), restartCommand(), setRestartCommand() */ /*! \fn void QSessionManager::setManagerProperty(const QString &name, const QString &value) \overload Low-level write access to the application's identification and state records are kept in the session manager. The property called \a name has its value set to the string \a value. */ /*! \fn void QSessionManager::setManagerProperty(const QString& name, const QStringList& value) Low-level write access to the application's identification and state record are kept in the session manager. The property called \a name has its value set to the string list \a value. */ /*! \fn bool QSessionManager::isPhase2() const Returns true if the session manager is currently performing a second session management phase; otherwise returns false. \sa requestPhase2() */ /*! \fn void QSessionManager::requestPhase2() Requests a second session management phase for the application. The application may then return immediately from the QApplication::commitData() or QApplication::saveState() function, and they will be called again once most or all other applications have finished their session management. The two phases are useful for applications such as the X11 window manager that need to store information about another application's windows and therefore have to wait until these applications have completed their respective session management tasks. \note If another application has requested a second phase it may get called before, simultaneously with, or after your application's second phase. \sa isPhase2() */ /***************************************************************************** Stubbed session management support *****************************************************************************/ #ifndef QT_NO_SESSIONMANAGER #if defined(Q_WS_WIN) || defined(Q_WS_MAC) || defined(Q_WS_QWS) #if defined(Q_OS_WINCE) HRESULT qt_CoCreateGuid(GUID* guid) { // We will use the following information to create the GUID // 1. absolute path to application wchar_t tempFilename[MAX_PATH]; if (!GetModuleFileName(0, tempFilename, MAX_PATH)) return S_FALSE; unsigned int hash = qHash(QString::fromWCharArray(tempFilename)); guid->Data1 = hash; // 2. creation time of file QFileInfo info(QString::fromWCharArray(tempFilename)); guid->Data2 = qHash(info.created().toTime_t()); // 3. current system time guid->Data3 = qHash(QDateTime::currentDateTime().toTime_t()); return S_OK; } #if !defined(OLE32_MCOMGUID) || defined(QT_WINCE_FORCE_CREATE_GUID) #define CoCreateGuid qt_CoCreateGuid #endif #endif class QSessionManagerPrivate : public QObjectPrivate { public: QStringList restartCommand; QStringList discardCommand; QString sessionId; QString sessionKey; QSessionManager::RestartHint restartHint; }; QSessionManager* qt_session_manager_self = 0; QSessionManager::QSessionManager(QApplication * app, QString &id, QString &key) : QObject(*new QSessionManagerPrivate, app) { Q_D(QSessionManager); setObjectName(QLatin1String("qt_sessionmanager")); qt_session_manager_self = this; #if defined(Q_WS_WIN) wchar_t guidstr[40]; GUID guid; CoCreateGuid(&guid); StringFromGUID2(guid, guidstr, 40); id = QString::fromWCharArray(guidstr); CoCreateGuid(&guid); StringFromGUID2(guid, guidstr, 40); key = QString::fromWCharArray(guidstr); #endif d->sessionId = id; d->sessionKey = key; d->restartHint = RestartIfRunning; } QSessionManager::~QSessionManager() { qt_session_manager_self = 0; } QString QSessionManager::sessionId() const { Q_D(const QSessionManager); return d->sessionId; } QString QSessionManager::sessionKey() const { Q_D(const QSessionManager); return d->sessionKey; } #if defined(Q_WS_X11) || defined(Q_WS_MAC) void* QSessionManager::handle() const { return 0; } #endif #if !defined(Q_WS_WIN) bool QSessionManager::allowsInteraction() { return true; } bool QSessionManager::allowsErrorInteraction() { return true; } void QSessionManager::release() { } void QSessionManager::cancel() { } #endif void QSessionManager::setRestartHint(QSessionManager::RestartHint hint) { Q_D(QSessionManager); d->restartHint = hint; } QSessionManager::RestartHint QSessionManager::restartHint() const { Q_D(const QSessionManager); return d->restartHint; } void QSessionManager::setRestartCommand(const QStringList& command) { Q_D(QSessionManager); d->restartCommand = command; } QStringList QSessionManager::restartCommand() const { Q_D(const QSessionManager); return d->restartCommand; } void QSessionManager::setDiscardCommand(const QStringList& command) { Q_D(QSessionManager); d->discardCommand = command; } QStringList QSessionManager::discardCommand() const { Q_D(const QSessionManager); return d->discardCommand; } void QSessionManager::setManagerProperty(const QString&, const QString&) { } void QSessionManager::setManagerProperty(const QString&, const QStringList&) { } bool QSessionManager::isPhase2() const { return false; } void QSessionManager::requestPhase2() { } #endif #endif // QT_NO_SESSIONMANAGER /*! \typedef QApplication::ColorMode \compat Use ColorSpec instead. */ /*! \fn Qt::MacintoshVersion QApplication::macVersion() Use QSysInfo::MacintoshVersion instead. */ /*! \fn QApplication::ColorMode QApplication::colorMode() Use colorSpec() instead, and use ColorSpec as the enum type. */ /*! \fn void QApplication::setColorMode(ColorMode mode) Use setColorSpec() instead, and pass a ColorSpec value instead. */ /*! \fn bool QApplication::hasGlobalMouseTracking() This feature does not exist anymore. This function always returns true in Qt 4. */ /*! \fn void QApplication::setGlobalMouseTracking(bool dummy) This function does nothing in Qt 4. The \a dummy parameter is ignored. */ /*! \fn void QApplication::flushX() Use flush() instead. */ /*! \fn void QApplication::setWinStyleHighlightColor(const QColor &c) Use the palette instead. \oldcode app.setWinStyleHighlightColor(color); \newcode QPalette palette(QApplication::palette()); palette.setColor(QPalette::Highlight, color); QApplication::setPalette(palette); \endcode */ /*! \fn void QApplication::setPalette(const QPalette &pal, bool b, const char* className = 0) Use the two-argument overload instead. */ /*! \fn void QApplication::setFont(const QFont &font, bool b, const char* className = 0) Use the two-argument overload instead. */ /*! \fn const QColor &QApplication::winStyleHighlightColor() Use QApplication::palette().color(QPalette::Active, QPalette::Highlight) instead. */ /*! \fn QWidget *QApplication::widgetAt(int x, int y, bool child) Use the two-argument widgetAt() overload to get the child widget. To get the top-level widget do this: \snippet doc/src/snippets/code/src_gui_kernel_qapplication.cpp 12 */ /*! \fn QWidget *QApplication::widgetAt(const QPoint &point, bool child) Use the single-argument widgetAt() overload to get the child widget. To get the top-level widget do this: \snippet doc/src/snippets/code/src_gui_kernel_qapplication.cpp 13 */ bool QApplicationPrivate::inPopupMode() const { return QApplicationPrivate::popupWidgets != 0; } /*! \property QApplication::quitOnLastWindowClosed \brief whether the application implicitly quits when the last window is closed. The default is true. If this property is true, the applications quits when the last visible primary window (i.e. window with no parent) with the Qt::WA_QuitOnClose attribute set is closed. By default this attribute is set for all widgets except for sub-windows. Refer to \l{Qt::WindowType} for a detailed list of Qt::Window objects. \sa quit(), QWidget::close() */ void QApplication::setQuitOnLastWindowClosed(bool quit) { QApplicationPrivate::quitOnLastWindowClosed = quit; } bool QApplication::quitOnLastWindowClosed() { return QApplicationPrivate::quitOnLastWindowClosed; } void QApplicationPrivate::emitLastWindowClosed() { if (qApp && qApp->d_func()->in_exec) { if (QApplicationPrivate::quitOnLastWindowClosed) { // get ready to quit, this event might be removed if the // event loop is re-entered, however QApplication::postEvent(qApp, new QEvent(QEvent::Quit)); } emit qApp->lastWindowClosed(); } } /*! \variable QApplication::NormalColors \compat Use \l NormalColor instead. */ /*! \variable QApplication::CustomColors \compat Use \l CustomColor instead. */ #ifdef QT_KEYPAD_NAVIGATION /*! Sets the kind of focus navigation Qt should use to \a mode. This feature is available in Qt for Embedded Linux, Symbian and Windows CE only. \note On Windows CE this feature is disabled by default for touch device mkspecs. To enable keypad navigation, build Qt with QT_KEYPAD_NAVIGATION defined. \note On Symbian, setting the mode to Qt::NavigationModeCursorAuto will enable a virtual mouse cursor on non touchscreen devices, which is controlled by the cursor keys if there is no analog pointer device. On other platforms and on touchscreen devices, it has the same meaning as Qt::NavigationModeNone. \since 4.6 \sa keypadNavigationEnabled() */ void QApplication::setNavigationMode(Qt::NavigationMode mode) { #ifdef Q_OS_SYMBIAN QApplicationPrivate::setNavigationMode(mode); #else QApplicationPrivate::navigationMode = mode; #endif } /*! Returns what kind of focus navigation Qt is using. This feature is available in Qt for Embedded Linux, Symbian and Windows CE only. \note On Windows CE this feature is disabled by default for touch device mkspecs. To enable keypad navigation, build Qt with QT_KEYPAD_NAVIGATION defined. \note On Symbian, the default mode is Qt::NavigationModeNone for touch devices, and Qt::NavigationModeKeypadDirectional. \since 4.6 \sa keypadNavigationEnabled() */ Qt::NavigationMode QApplication::navigationMode() { return QApplicationPrivate::navigationMode; } /*! Sets whether Qt should use focus navigation suitable for use with a minimal keypad. This feature is available in Qt for Embedded Linux, Symbian and Windows CE only. \note On Windows CE this feature is disabled by default for touch device mkspecs. To enable keypad navigation, build Qt with QT_KEYPAD_NAVIGATION defined. \deprecated \sa setNavigationMode() */ void QApplication::setKeypadNavigationEnabled(bool enable) { if (enable) { #ifdef Q_OS_SYMBIAN QApplication::setNavigationMode(Qt::NavigationModeKeypadDirectional); #else QApplication::setNavigationMode(Qt::NavigationModeKeypadTabOrder); #endif } else { QApplication::setNavigationMode(Qt::NavigationModeNone); } } /*! Returns true if Qt is set to use keypad navigation; otherwise returns false. The default value is true on Symbian, but false on other platforms. This feature is available in Qt for Embedded Linux, Symbian and Windows CE only. \note On Windows CE this feature is disabled by default for touch device mkspecs. To enable keypad navigation, build Qt with QT_KEYPAD_NAVIGATION defined. \deprecated \sa navigationMode() */ bool QApplication::keypadNavigationEnabled() { return QApplicationPrivate::navigationMode == Qt::NavigationModeKeypadTabOrder || QApplicationPrivate::navigationMode == Qt::NavigationModeKeypadDirectional; } #endif /*! \fn void QApplication::alert(QWidget *widget, int msec) \since 4.3 Causes an alert to be shown for \a widget if the window is not the active window. The alert is shown for \a msec miliseconds. If \a msec is zero (the default), then the alert is shown indefinitely until the window becomes active again. Currently this function does nothing on Qt for Embedded Linux. On Mac OS X, this works more at the application level and will cause the application icon to bounce in the dock. On Windows, this causes the window's taskbar entry to flash for a time. If \a msec is zero, the flashing will stop and the taskbar entry will turn a different color (currently orange). On X11, this will cause the window to be marked as "demands attention", the window must not be hidden (i.e. not have hide() called on it, but be visible in some sort of way) in order for this to work. */ /*! \property QApplication::cursorFlashTime \brief the text cursor's flash (blink) time in milliseconds The flash time is the time required to display, invert and restore the caret display. Usually the text cursor is displayed for half the cursor flash time, then hidden for the same amount of time, but this may vary. The default value on X11 is 1000 milliseconds. On Windows, the \gui{Control Panel} value is used and setting this property sets the cursor flash time for all applications. We recommend that widgets do not cache this value as it may change at any time if the user changes the global desktop settings. */ void QApplication::setCursorFlashTime(int msecs) { Q_UNUSED(msecs); } int QApplication::cursorFlashTime() { return qApp->styleHints()->cursorFlashTime(); } /*! \property QApplication::doubleClickInterval \brief the time limit in milliseconds that distinguishes a double click from two consecutive mouse clicks The default value on X11 is 400 milliseconds. On Windows and Mac OS, the operating system's value is used. Setting the interval is not supported anymore in Qt 5. */ void QApplication::setDoubleClickInterval(int ms) { Q_UNUSED(ms); } int QApplication::doubleClickInterval() { return qApp->styleHints()->mouseDoubleClickInterval(); } /*! \property QApplication::keyboardInputInterval \brief the time limit in milliseconds that distinguishes a key press from two consecutive key presses \since 4.2 The default value on X11 is 400 milliseconds. On Windows and Mac OS, the operating system's value is used. */ void QApplication::setKeyboardInputInterval(int ms) { Q_UNUSED(ms); } int QApplication::keyboardInputInterval() { return qApp->styleHints()->keyboardInputInterval(); } /*! \property QApplication::wheelScrollLines \brief the number of lines to scroll a widget, when the mouse wheel is rotated. If the value exceeds the widget's number of visible lines, the widget should interpret the scroll operation as a single \e{page up} or \e{page down}. If the widget is an \l{QAbstractItemView}{item view class}, then the result of scrolling one \e line depends on the setting of the widget's \l{QAbstractItemView::verticalScrollMode()}{scroll mode}. Scroll one \e line can mean \l{QAbstractItemView::ScrollPerItem}{scroll one item} or \l{QAbstractItemView::ScrollPerPixel}{scroll one pixel}. By default, this property has a value of 3. */ /*! \fn void QApplication::setEffectEnabled(Qt::UIEffect effect, bool enable) Enables the UI effect \a effect if \a enable is true, otherwise the effect will not be used. \note All effects are disabled on screens running at less than 16-bit color depth. \sa isEffectEnabled(), Qt::UIEffect, setDesktopSettingsAware() */ /*! \fn bool QApplication::isEffectEnabled(Qt::UIEffect effect) Returns true if \a effect is enabled; otherwise returns false. By default, Qt will try to use the desktop settings. To prevent this, call setDesktopSettingsAware(false). \note All effects are disabled on screens running at less than 16-bit color depth. \sa setEffectEnabled(), Qt::UIEffect */ /*! \fn QWidget *QApplication::mainWidget() Returns the main application widget, or 0 if there is no main widget. */ /*! \fn void QApplication::setMainWidget(QWidget *mainWidget) Sets the application's main widget to \a mainWidget. In most respects the main widget is like any other widget, except that if it is closed, the application exits. QApplication does \e not take ownership of the \a mainWidget, so if you create your main widget on the heap you must delete it yourself. You need not have a main widget; connecting lastWindowClosed() to quit() is an alternative. On X11, this function also resizes and moves the main widget according to the \e -geometry command-line option, so you should set the default geometry (using \l QWidget::setGeometry()) before calling setMainWidget(). \sa mainWidget(), exec(), quit() */ /*! \fn void QApplication::beep() Sounds the bell, using the default volume and sound. The function is \e not available in Qt for Embedded Linux. */ /*! \fn void QApplication::setOverrideCursor(const QCursor &cursor) Sets the application override cursor to \a cursor. Application override cursors are intended for showing the user that the application is in a special state, for example during an operation that might take some time. This cursor will be displayed in all the application's widgets until restoreOverrideCursor() or another setOverrideCursor() is called. Application cursors are stored on an internal stack. setOverrideCursor() pushes the cursor onto the stack, and restoreOverrideCursor() pops the active cursor off the stack. changeOverrideCursor() changes the curently active application override cursor. Every setOverrideCursor() must eventually be followed by a corresponding restoreOverrideCursor(), otherwise the stack will never be emptied. Example: \snippet doc/src/snippets/code/src_gui_kernel_qapplication_x11.cpp 0 \sa overrideCursor(), restoreOverrideCursor(), changeOverrideCursor(), QWidget::setCursor() */ /*! \fn void QApplication::restoreOverrideCursor() Undoes the last setOverrideCursor(). If setOverrideCursor() has been called twice, calling restoreOverrideCursor() will activate the first cursor set. Calling this function a second time restores the original widgets' cursors. \sa setOverrideCursor(), overrideCursor() */ /*! \macro qApp \relates QApplication A global pointer referring to the unique application object. It is equivalent to the pointer returned by the QCoreApplication::instance() function except that, in GUI applications, it is a pointer to a QApplication instance. Only one application object can be created. \sa QCoreApplication::instance() */ #ifndef QT_NO_IM // ************************************************************************ // Input Method support // ************************************************************************ /*! This function replaces the QInputContext instance used by the application with \a inputContext. Qt takes ownership of the given \a inputContext. \sa inputContext() */ void QApplication::setInputContext(QInputContext *inputContext) { if (inputContext == QApplicationPrivate::inputContext) return; if (!inputContext) { qWarning("QApplication::setInputContext: called with 0 input context"); return; } delete QApplicationPrivate::inputContext; QApplicationPrivate::inputContext = inputContext; QApplicationPrivate::inputContext->setParent(this); } /*! Returns the QInputContext instance used by the application. \sa setInputContext() */ QInputContext *QApplication::inputContext() const { return QApplicationPrivate::inputContext; } #endif // QT_NO_IM bool qt_sendSpontaneousEvent(QObject *receiver, QEvent *event) { return QApplicationBase::sendSpontaneousEvent(receiver, event); } void QApplicationPrivate::giveFocusAccordingToFocusPolicy(QWidget *widget, Qt::FocusPolicy focusPolicy, Qt::FocusReason focusReason) { QWidget *focusWidget = widget; while (focusWidget) { if (focusWidget->isEnabled() && QApplicationPrivate::shouldSetFocus(focusWidget, focusPolicy)) { focusWidget->setFocus(focusReason); break; } if (focusWidget->isWindow()) break; focusWidget = focusWidget->parentWidget(); } } bool QApplicationPrivate::shouldSetFocus(QWidget *w, Qt::FocusPolicy policy) { QWidget *f = w; while (f->d_func()->extra && f->d_func()->extra->focus_proxy) f = f->d_func()->extra->focus_proxy; if ((w->focusPolicy() & policy) != policy) return false; if (w != f && (f->focusPolicy() & policy) != policy) return false; return true; } /*! \fn QDecoration &QApplication::qwsDecoration() Return the QWSDecoration used for decorating windows. \warning This method is non-portable. It is only available in Qt for Embedded Linux. \sa QDecoration */ /*! \fn void QApplication::qwsSetDecoration(QDecoration *decoration) Sets the QDecoration derived class to use for decorating the windows used by Qt for Embedded Linux to the \a decoration specified. This method is non-portable. It is only available in Qt for Embedded Linux. \sa QDecoration */ /*! \fn QDecoration* QApplication::qwsSetDecoration(const QString &decoration) \overload Requests a QDecoration object for \a decoration from the QDecorationFactory. The string must be one of the QDecorationFactory::keys(). Keys are case insensitive. A later call to the QApplication constructor will override the requested style when a "-style" option is passed in as a commandline parameter. Returns 0 if an unknown \a decoration is passed, otherwise the QStyle object returned is set as the application's GUI style. */ /*! \fn bool QApplication::qwsEventFilter(QWSEvent *event) This virtual function is only implemented under Qt for Embedded Linux. If you create an application that inherits QApplication and reimplement this function, you get direct access to all QWS (Q Window System) events that the are received from the QWS master process. The events are passed in the \a event parameter. Return true if you want to stop the event from being processed. Return false for normal event dispatching. The default implementation returns false. */ /*! \fn void QApplication::qwsSetCustomColors(QRgb *colorTable, int start, int numColors) Set Qt for Embedded Linux custom color table. Qt for Embedded Linux on 8-bpp displays allocates a standard 216 color cube. The remaining 40 colors may be used by setting a custom color table in the QWS master process before any clients connect. \a colorTable is an array of up to 40 custom colors. \a start is the starting index (0-39) and \a numColors is the number of colors to be set (1-40). This method is non-portable. It is available \e only in Qt for Embedded Linux. \note The custom colors will not be used by the default screen driver. To make use of the new colors, implement a custom screen driver, or use QDirectPainter. */ /*! \fn int QApplication::qwsProcessEvent(QWSEvent* event) \internal */ /*! \fn int QApplication::x11ClientMessage(QWidget* w, XEvent* event, bool passive_only) \internal */ /*! \fn int QApplication::x11ProcessEvent(XEvent* event) This function does the core processing of individual X \a{event}s, normally by dispatching Qt events to the right destination. It returns 1 if the event was consumed by special handling, 0 if the \a event was consumed by normal handling, and -1 if the \a event was for an unrecognized widget. \sa x11EventFilter() */ /*! \fn bool QApplication::x11EventFilter(XEvent *event) \warning This virtual function is only implemented under X11. If you create an application that inherits QApplication and reimplement this function, you get direct access to all X events that the are received from the X server. The events are passed in the \a event parameter. Return true if you want to stop the event from being processed. Return false for normal event dispatching. The default implementation returns false. It is only the directly addressed messages that are filtered. You must install an event filter directly on the event dispatcher, which is returned by QAbstractEventDispatcher::instance(), to handle system wide messages. \sa x11ProcessEvent() */ /*! \fn void QApplication::winFocus(QWidget *widget, bool gotFocus) \internal \since 4.1 If \a gotFocus is true, \a widget will become the active window. Otherwise the active window is reset to 0. */ /*! \fn void QApplication::winMouseButtonUp() \internal */ /*! \fn void QApplication::syncX() Synchronizes with the X server in the X11 implementation. This normally takes some time. Does nothing on other platforms. */ void QApplicationPrivate::updateTouchPointsForWidget(QWidget *widget, QTouchEvent *touchEvent) { for (int i = 0; i < touchEvent->touchPoints().count(); ++i) { QTouchEvent::TouchPoint &touchPoint = touchEvent->_touchPoints[i]; // preserve the sub-pixel resolution QRectF rect = touchPoint.screenRect(); const QPointF screenPos = rect.center(); const QPointF delta = screenPos - screenPos.toPoint(); rect.moveCenter(widget->mapFromGlobal(screenPos.toPoint()) + delta); touchPoint.d->rect = rect; if (touchPoint.state() == Qt::TouchPointPressed) { touchPoint.d->startPos = widget->mapFromGlobal(touchPoint.startScreenPos().toPoint()) + delta; touchPoint.d->lastPos = widget->mapFromGlobal(touchPoint.lastScreenPos().toPoint()) + delta; } } } void QApplicationPrivate::initializeMultitouch() { widgetForTouchPointId.clear(); appCurrentTouchPoints.clear(); initializeMultitouch_sys(); } void QApplicationPrivate::cleanupMultitouch() { cleanupMultitouch_sys(); widgetForTouchPointId.clear(); appCurrentTouchPoints.clear(); } int QApplicationPrivate::findClosestTouchPointId(const QPointF &screenPos) { int closestTouchPointId = -1; qreal closestDistance = qreal(0.); foreach (const QTouchEvent::TouchPoint &touchPoint, appCurrentTouchPoints) { qreal distance = QLineF(screenPos, touchPoint.screenPos()).length(); if (closestTouchPointId == -1 || distance < closestDistance) { closestTouchPointId = touchPoint.id(); closestDistance = distance; } } return closestTouchPointId; } void QApplicationPrivate::translateRawTouchEvent(QWidget *window, QTouchEvent::DeviceType deviceType, const QList &touchPoints) { QApplicationPrivate *d = self; typedef QPair > StatesAndTouchPoints; QHash widgetsNeedingEvents; for (int i = 0; i < touchPoints.count(); ++i) { QTouchEvent::TouchPoint touchPoint = touchPoints.at(i); // explicitly detach from the original touch point that we got, so even // if the touchpoint structs are reused, we will make a copy that we'll // deliver to the user (which might want to store the struct for later use). touchPoint.d = touchPoint.d->detach(); // update state QWeakPointer widget; switch (touchPoint.state()) { case Qt::TouchPointPressed: { if (deviceType == QTouchEvent::TouchPad) { // on touch-pads, send all touch points to the same widget widget = d->widgetForTouchPointId.isEmpty() ? QWeakPointer() : d->widgetForTouchPointId.constBegin().value(); } if (!widget) { // determine which widget this event will go to if (!window) window = QApplication::topLevelAt(touchPoint.screenPos().toPoint()); if (!window) continue; widget = window->childAt(window->mapFromGlobal(touchPoint.screenPos().toPoint())); if (!widget) widget = window; } if (deviceType == QTouchEvent::TouchScreen) { int closestTouchPointId = d->findClosestTouchPointId(touchPoint.screenPos()); QWidget *closestWidget = d->widgetForTouchPointId.value(closestTouchPointId).data(); if (closestWidget && (widget.data()->isAncestorOf(closestWidget) || closestWidget->isAncestorOf(widget.data()))) { widget = closestWidget; } } d->widgetForTouchPointId[touchPoint.id()] = widget; touchPoint.d->startScreenPos = touchPoint.screenPos(); touchPoint.d->lastScreenPos = touchPoint.screenPos(); touchPoint.d->startNormalizedPos = touchPoint.normalizedPos(); touchPoint.d->lastNormalizedPos = touchPoint.normalizedPos(); if (touchPoint.pressure() < qreal(0.)) touchPoint.d->pressure = qreal(1.); d->appCurrentTouchPoints.insert(touchPoint.id(), touchPoint); break; } case Qt::TouchPointReleased: { widget = d->widgetForTouchPointId.take(touchPoint.id()); if (!widget) continue; QTouchEvent::TouchPoint previousTouchPoint = d->appCurrentTouchPoints.take(touchPoint.id()); touchPoint.d->startScreenPos = previousTouchPoint.startScreenPos(); touchPoint.d->lastScreenPos = previousTouchPoint.screenPos(); touchPoint.d->startPos = previousTouchPoint.startPos(); touchPoint.d->lastPos = previousTouchPoint.pos(); touchPoint.d->startNormalizedPos = previousTouchPoint.startNormalizedPos(); touchPoint.d->lastNormalizedPos = previousTouchPoint.normalizedPos(); if (touchPoint.pressure() < qreal(0.)) touchPoint.d->pressure = qreal(0.); break; } default: widget = d->widgetForTouchPointId.value(touchPoint.id()); if (!widget) continue; Q_ASSERT(d->appCurrentTouchPoints.contains(touchPoint.id())); QTouchEvent::TouchPoint previousTouchPoint = d->appCurrentTouchPoints.value(touchPoint.id()); touchPoint.d->startScreenPos = previousTouchPoint.startScreenPos(); touchPoint.d->lastScreenPos = previousTouchPoint.screenPos(); touchPoint.d->startPos = previousTouchPoint.startPos(); touchPoint.d->lastPos = previousTouchPoint.pos(); touchPoint.d->startNormalizedPos = previousTouchPoint.startNormalizedPos(); touchPoint.d->lastNormalizedPos = previousTouchPoint.normalizedPos(); if (touchPoint.pressure() < qreal(0.)) touchPoint.d->pressure = qreal(1.); d->appCurrentTouchPoints[touchPoint.id()] = touchPoint; break; } Q_ASSERT(widget.data() != 0); // make the *scene* functions return the same as the *screen* functions touchPoint.d->sceneRect = touchPoint.screenRect(); touchPoint.d->startScenePos = touchPoint.startScreenPos(); touchPoint.d->lastScenePos = touchPoint.lastScreenPos(); StatesAndTouchPoints &maskAndPoints = widgetsNeedingEvents[widget.data()]; maskAndPoints.first |= touchPoint.state(); if (touchPoint.isPrimary()) maskAndPoints.first |= Qt::TouchPointPrimary; maskAndPoints.second.append(touchPoint); } if (widgetsNeedingEvents.isEmpty()) return; QHash::ConstIterator it = widgetsNeedingEvents.constBegin(); const QHash::ConstIterator end = widgetsNeedingEvents.constEnd(); for (; it != end; ++it) { QWidget *widget = it.key(); if (!QApplicationPrivate::tryModalHelper(widget, 0)) continue; QEvent::Type eventType; switch (it.value().first & Qt::TouchPointStateMask) { case Qt::TouchPointPressed: eventType = QEvent::TouchBegin; break; case Qt::TouchPointReleased: eventType = QEvent::TouchEnd; break; case Qt::TouchPointStationary: // don't send the event if nothing changed continue; default: eventType = QEvent::TouchUpdate; break; } QTouchEvent touchEvent(eventType, deviceType, QApplication::keyboardModifiers(), it.value().first, it.value().second); updateTouchPointsForWidget(widget, &touchEvent); switch (touchEvent.type()) { case QEvent::TouchBegin: { // if the TouchBegin handler recurses, we assume that means the event // has been implicitly accepted and continue to send touch events widget->setAttribute(Qt::WA_WState_AcceptedTouchBeginEvent); (void ) QApplication::sendSpontaneousEvent(widget, &touchEvent); break; } default: if (widget->testAttribute(Qt::WA_WState_AcceptedTouchBeginEvent)) { if (touchEvent.type() == QEvent::TouchEnd) widget->setAttribute(Qt::WA_WState_AcceptedTouchBeginEvent, false); (void) QApplication::sendSpontaneousEvent(widget, &touchEvent); } break; } } } Q_WIDGETS_EXPORT void qt_translateRawTouchEvent(QWidget *window, QTouchEvent::DeviceType deviceType, const QList &touchPoints) { QApplicationPrivate::translateRawTouchEvent(window, deviceType, touchPoints); } #ifndef QT_NO_GESTURES QGestureManager* QGestureManager::instance() { QApplicationPrivate *qAppPriv = QApplicationPrivate::instance(); if (!qAppPriv) return 0; if (!qAppPriv->gestureManager) qAppPriv->gestureManager = new QGestureManager(qApp); return qAppPriv->gestureManager; } #endif // QT_NO_GESTURES QT_END_NAMESPACE #include "moc_qapplication.cpp"