diff options
author | Shawn Rutledge <shawn.rutledge@digia.com> | 2014-08-07 13:57:50 +0200 |
---|---|---|
committer | J-P Nurmi <jpnurmi@digia.com> | 2014-08-08 19:28:34 +0200 |
commit | 60ed6a433a1d51d5ca7ccdeff3fce55e2350d20c (patch) | |
tree | 494b2eced9e2665aa0fc8e3546d2fc1230fc1663 /src/quick/items | |
parent | b4b27168ac03d61f6dfa146c9262df44097eadfe (diff) |
Add Window attached property on Item
An Item sometimes needs to know a few things about the window
in which it is being displayed; this attached property can expose
them without needing to go up the heirarchy to find the window.
Instead of adding the QQuickWindow pointer as a property on Item
as in 8f49f50a169db85401eb37daf4fe3a0fc3280603, having an attached
property means that it will not be found by introspection; and
it solves the problem that Window is in the QtQuick.Window module:
you must import the module to use the attached property, instead
of having access to a pointer whose type might not be defined
if you didn't import it. The Window attached property is created
on-demand (so the memory cost adds up if you use it in too many
places); the tradeoff is that it can exist even when the item
is not yet being shown in a window, so bindings at startup work.
The API is purposely incomplete compared to that in QQuickWindow
so that we can introduce what is needed in a controlled fasion
over time. For now we know of use cases for visibility, active
and activeFocusItem.
[ChangeLog][QtQuick][Window] Added Item.Window attached property
Change-Id: I649404cbd1383326678aa2144f790b2f2542dbbc
Reviewed-by: J-P Nurmi <jpnurmi@digia.com>
Diffstat (limited to 'src/quick/items')
-rw-r--r-- | src/quick/items/items.pri | 2 | ||||
-rw-r--r-- | src/quick/items/qquickwindow.cpp | 47 | ||||
-rw-r--r-- | src/quick/items/qquickwindow.h | 5 | ||||
-rw-r--r-- | src/quick/items/qquickwindowattached.cpp | 110 | ||||
-rw-r--r-- | src/quick/items/qquickwindowattached_p.h | 84 | ||||
-rw-r--r-- | src/quick/items/qquickwindowmodule.cpp | 5 |
6 files changed, 253 insertions, 0 deletions
diff --git a/src/quick/items/items.pri b/src/quick/items/items.pri index 042ff80abc..87e2212dd3 100644 --- a/src/quick/items/items.pri +++ b/src/quick/items/items.pri @@ -73,6 +73,7 @@ HEADERS += \ $$PWD/qquickitemview_p_p.h \ $$PWD/qquickitemviewtransition_p.h \ $$PWD/qquickscreen_p.h \ + $$PWD/qquickwindowattached_p.h \ $$PWD/qquickwindowmodule_p.h \ $$PWD/qquickframebufferobject.h \ $$PWD/qquickitemgrabresult.h \ @@ -129,6 +130,7 @@ SOURCES += \ $$PWD/qquickitemviewtransition.cpp \ $$PWD/qquickwindowmodule.cpp \ $$PWD/qquickscreen.cpp \ + $$PWD/qquickwindowattached.cpp \ $$PWD/qquickframebufferobject.cpp \ $$PWD/qquickitemgrabresult.cpp \ $$PWD/qquickrendercontrol.cpp diff --git a/src/quick/items/qquickwindow.cpp b/src/quick/items/qquickwindow.cpp index eb97dde6cb..1640b58c75 100644 --- a/src/quick/items/qquickwindow.cpp +++ b/src/quick/items/qquickwindow.cpp @@ -41,6 +41,7 @@ #include "qquickwindow.h" #include "qquickwindow_p.h" +#include "qquickwindowattached_p.h" #include "qquickitem.h" #include "qquickitem_p.h" @@ -3850,6 +3851,18 @@ bool QQuickWindow::glslIsCoreProfile() const */ /*! + \qmlattachedproperty QWindow::Visibility Window::visibility + \since 5.4 + + This attached property holds whether whether the window is currently shown + in the windowing system as normal, minimized, maximized, fullscreen or + hidden. The Window attached property can be attached to any Item. If the + item is not shown in any window, the value will be \l {QWindow::}{Hidden}. + + \sa visible, visibility +*/ + +/*! \qmlproperty Qt::ScreenOrientation Window::contentOrientation This is a hint to the window manager in case it needs to display @@ -3896,6 +3909,15 @@ bool QQuickWindow::glslIsCoreProfile() const */ /*! + \qmlattachedproperty Item Window::activeFocusItem + \since 5.4 + + This attached property holds the item which currently has active focus or + \c null if there is no item with active focus. The Window attached property + can be attached to any Item. +*/ + +/*! \qmlproperty Window::active \since 5.1 @@ -3905,6 +3927,26 @@ bool QQuickWindow::glslIsCoreProfile() const */ /*! + \qmlattachedproperty bool Window::active + \since 5.4 + + This attached property tells whether the window is active. The Window + attached property can be attached to any Item. + + Here is an example which changes a label to show the active state of the + window in which it is shown: + + \qml + import QtQuick 2.4 + import QtQuick.Window 2.2 + + Text { + text: Window.active ? "active" : "inactive" + } + \endqml +*/ + +/*! \qmlmethod QtQuick::Window::requestActivate() \since 5.1 @@ -3983,6 +4025,11 @@ void QQuickWindow::scheduleRenderJob(QRunnable *job, RenderStage stage) d->renderJobMutex.unlock(); } +QQuickWindowAttached *QQuickWindow::qmlAttachedProperties(QObject *object) +{ + return new QQuickWindowAttached(object); +} + void QQuickWindowPrivate::runAndClearJobs(QList<QRunnable *> *jobs) { renderJobMutex.lock(); diff --git a/src/quick/items/qquickwindow.h b/src/quick/items/qquickwindow.h index 6353f6a30c..04a89b1d3d 100644 --- a/src/quick/items/qquickwindow.h +++ b/src/quick/items/qquickwindow.h @@ -47,6 +47,7 @@ #include <QtGui/qopengl.h> #include <QtGui/qwindow.h> #include <QtGui/qevent.h> +#include <qqml.h> QT_BEGIN_NAMESPACE @@ -55,6 +56,7 @@ class QQuickItem; class QSGTexture; class QInputMethodEvent; class QQuickWindowPrivate; +class QQuickWindowAttached; class QOpenGLFramebufferObject; class QQmlIncubationController; class QInputMethodEvent; @@ -156,6 +158,8 @@ public: void scheduleRenderJob(QRunnable *job, RenderStage schedule); + static QQuickWindowAttached *qmlAttachedProperties(QObject *object); + Q_SIGNALS: void frameSwapped(); Q_REVISION(2) void openglContextCreated(QOpenGLContext *context); @@ -220,6 +224,7 @@ private: QT_END_NAMESPACE Q_DECLARE_METATYPE(QQuickWindow *) +QML_DECLARE_TYPEINFO(QQuickWindow, QML_HAS_ATTACHED_PROPERTIES) #endif // QQUICKWINDOW_H diff --git a/src/quick/items/qquickwindowattached.cpp b/src/quick/items/qquickwindowattached.cpp new file mode 100644 index 0000000000..666b21f6cd --- /dev/null +++ b/src/quick/items/qquickwindowattached.cpp @@ -0,0 +1,110 @@ +/**************************************************************************** +** +** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/legal +** +** This file is part of the QtQuick module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and Digia. For licensing terms and +** conditions see http://qt.digia.com/licensing. For further information +** use the contact form at http://qt.digia.com/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, 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, Digia gives you certain additional +** rights. These rights are described in the Digia 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. +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qquickwindow.h" +#include "qquickitem.h" +#include "qquickwindowattached_p.h" + +QT_BEGIN_NAMESPACE + +// QDoc comments must go in qquickwindow.cpp to avoid overwriting the Window docs + +QQuickWindowAttached::QQuickWindowAttached(QObject* attachee) + : QObject(attachee) + , m_window(NULL) +{ + m_attachee = qobject_cast<QQuickItem*>(attachee); + if (m_attachee && m_attachee->window()) // It might not be in a window yet + windowChanged(m_attachee->window()); + if (m_attachee) + connect(m_attachee, &QQuickItem::windowChanged, this, &QQuickWindowAttached::windowChanged); +} + +QWindow::Visibility QQuickWindowAttached::visibility() const +{ + return (m_window ? m_window->visibility() : QWindow::Hidden); +} + +bool QQuickWindowAttached::isActive() const +{ + return (m_window ? m_window->isActive() : false); +} + +QQuickItem *QQuickWindowAttached::activeFocusItem() const +{ + return (m_window ? m_window->activeFocusItem() : Q_NULLPTR); +} + +void QQuickWindowAttached::windowChanged(QQuickWindow *window) +{ + if (window != m_window) { + QQuickWindow* oldWindow = m_window; + m_window = window; + + if (oldWindow) + oldWindow->disconnect(this); + + if (!window) + return; // No values to get, therefore nothing to emit + + if (!oldWindow || window->visibility() != oldWindow->visibility()) + emit visibilityChanged(); + if (!oldWindow || window->isActive() != oldWindow->isActive()) + emit activeChanged(); + if (!oldWindow || window->activeFocusItem() != oldWindow->activeFocusItem()) + emit activeFocusItemChanged(); + + // QQuickWindowQmlImpl::visibilityChanged also exists, and window might even + // be QQuickWindowQmlImpl, but that's not what we are connecting to. + // So this is actual window state rather than a buffered or as-requested one. + // If we used the metaobject connect syntax there would be a warning: + // QMetaObjectPrivate::indexOfSignalRelative - QMetaObject::indexOfSignal: + // signal visibilityChanged(QWindow::Visibility) from QQuickWindow redefined in QQuickWindowQmlImpl + connect(window, &QQuickWindow::visibilityChanged, + this, &QQuickWindowAttached::visibilityChanged); + connect(window, &QQuickWindow::activeChanged, + this, &QQuickWindowAttached::activeChanged); + connect(window, &QQuickWindow::activeFocusItemChanged, + this, &QQuickWindowAttached::activeFocusItemChanged); + } +} + +QT_END_NAMESPACE diff --git a/src/quick/items/qquickwindowattached_p.h b/src/quick/items/qquickwindowattached_p.h new file mode 100644 index 0000000000..007ff007f7 --- /dev/null +++ b/src/quick/items/qquickwindowattached_p.h @@ -0,0 +1,84 @@ +/**************************************************************************** +** +** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/legal +** +** This file is part of the QtQuick module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and Digia. For licensing terms and +** conditions see http://qt.digia.com/licensing. For further information +** use the contact form at http://qt.digia.com/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, 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, Digia gives you certain additional +** rights. These rights are described in the Digia 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. +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QQUICKWINDOW_ATTACHED_P_H +#define QQUICKWINDOW_ATTACHED_P_H + +#include <qqml.h> +#include <QWindow> + +QT_BEGIN_NAMESPACE + +class QQuickItem; +class QQuickWindow; + +class Q_AUTOTEST_EXPORT QQuickWindowAttached : public QObject +{ + Q_OBJECT + + Q_PROPERTY(QWindow::Visibility visibility READ visibility NOTIFY visibilityChanged) + Q_PROPERTY(bool active READ isActive NOTIFY activeChanged) + Q_PROPERTY(QQuickItem* activeFocusItem READ activeFocusItem NOTIFY activeFocusItemChanged) + +public: + QQuickWindowAttached(QObject* attachee); + + QWindow::Visibility visibility() const; + bool isActive() const; + QQuickItem* activeFocusItem() const; + +Q_SIGNALS: + + void visibilityChanged(); + void activeChanged(); + void activeFocusItemChanged(); + +protected Q_SLOTS: + void windowChanged(QQuickWindow*); + +private: + QQuickWindow* m_window; + QQuickItem* m_attachee; +}; + +QT_END_NAMESPACE + +#endif diff --git a/src/quick/items/qquickwindowmodule.cpp b/src/quick/items/qquickwindowmodule.cpp index 51053ea801..f472d5b867 100644 --- a/src/quick/items/qquickwindowmodule.cpp +++ b/src/quick/items/qquickwindowmodule.cpp @@ -40,6 +40,7 @@ ****************************************************************************/ #include "qquickwindowmodule_p.h" +#include "qquickwindowattached_p.h" #include "qquickscreen_p.h" #include "qquickview_p.h" #include <QtQuick/QQuickWindow> @@ -173,6 +174,10 @@ void QQuickWindowModule::defineModule() { const char uri[] = "QtQuick.Window"; + // Since Window is both an attached property and a createable type, + // the attached property declaration must come first so that it can + // be overridden below. + qmlRegisterUncreatableType<QQuickWindow>(uri, 2, 2, "Window", QQuickWindow::tr("Window is available via attached properties")); qmlRegisterType<QQuickWindow>(uri, 2, 0, "Window"); qmlRegisterRevision<QWindow,1>(uri, 2, 1); qmlRegisterRevision<QWindow,2>(uri, 2, 2); |