/**************************************************************************** ** ** Copyright (C) 2016 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the QtWidgets 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 The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. For further ** information use the contact form at https://www.qt.io/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 3 as published by the Free Software ** Foundation and appearing in the file LICENSE.LGPL3 included in the ** packaging of this file. Please review the following information to ** ensure the GNU Lesser General Public License version 3 requirements ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. ** ** GNU General Public License Usage ** Alternatively, this file may be used under the terms of the GNU ** General Public License version 2.0 or (at your option) the GNU General ** Public license version 3 or any later version approved by the KDE Free ** Qt Foundation. The licenses are as published by the Free Software ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 ** included in the packaging of this file. Please review the following ** information to ensure the GNU General Public License requirements will ** be met: https://www.gnu.org/licenses/gpl-2.0.html and ** https://www.gnu.org/licenses/gpl-3.0.html. ** ** $QT_END_LICENSE$ ** ****************************************************************************/ #include "private/qlayoutengine_p.h" #if QT_CONFIG(itemviews) #include "qabstractitemdelegate.h" #endif #include "qapplication.h" #include "qbitmap.h" #include "qcursor.h" #include "qevent.h" #include "qpainter.h" #include "qstyle.h" #include "qstyleoption.h" #include "qstylepainter.h" #if QT_CONFIG(tabwidget) #include "qtabwidget.h" #endif #include "qtooltip.h" #if QT_CONFIG(whatsthis) #include "qwhatsthis.h" #endif #include "private/qtextengine_p.h" #ifndef QT_NO_ACCESSIBILITY #include "qaccessible.h" #endif #ifdef Q_OS_OSX #include #endif #include "qdebug.h" #include "private/qtabbar_p.h" #if 0 // Used to be included in Qt4 for Q_WS_MAC #include #include #endif QT_BEGIN_NAMESPACE namespace { class CloseButton : public QAbstractButton { Q_OBJECT public: explicit CloseButton(QWidget *parent = 0); QSize sizeHint() const override; QSize minimumSizeHint() const override { return sizeHint(); } void enterEvent(QEvent *event) override; void leaveEvent(QEvent *event) override; void paintEvent(QPaintEvent *event) override; }; } QMovableTabWidget::QMovableTabWidget(QWidget *parent) : QWidget(parent) { } void QMovableTabWidget::setPixmap(const QPixmap &pixmap) { m_pixmap = pixmap; update(); } void QMovableTabWidget::paintEvent(QPaintEvent *e) { Q_UNUSED(e); QPainter p(this); p.drawPixmap(0, 0, m_pixmap); } inline static bool verticalTabs(QTabBar::Shape shape) { return shape == QTabBar::RoundedWest || shape == QTabBar::RoundedEast || shape == QTabBar::TriangularWest || shape == QTabBar::TriangularEast; } void QTabBarPrivate::updateMacBorderMetrics() { #if defined(Q_OS_OSX) Q_Q(QTabBar); // Extend the unified title and toolbar area to cover the tab bar iff // 1) the tab bar is in document mode // 2) the tab bar is directly below an "unified" area. // The extending itself is done in the Cocoa platform plugin and Mac style, // this function registers geometry and visibility state for the tab bar. // Calculate geometry int upper, lower; if (documentMode) { QPoint windowPos = q->mapTo(q->window(), QPoint(0,0)); upper = windowPos.y(); int tabStripHeight = q->tabSizeHint(0).height(); int pixelTweak = -3; lower = upper + tabStripHeight + pixelTweak; } else { upper = 0; lower = 0; } QPlatformNativeInterface *nativeInterface = QGuiApplication::platformNativeInterface(); quintptr identifier = reinterpret_cast(q); // Set geometry QPlatformNativeInterface::NativeResourceForIntegrationFunction function = nativeInterface->nativeResourceFunctionForIntegration("registerContentBorderArea"); if (!function) return; // Not Cocoa platform plugin. typedef void (*RegisterContentBorderAreaFunction)(QWindow *window, quintptr identifier, int upper, int lower); (reinterpret_cast(function))(q->window()->windowHandle(), identifier, upper, lower); // Set visibility state function = nativeInterface->nativeResourceFunctionForIntegration("setContentBorderAreaEnabled"); if (!function) return; typedef void (*SetContentBorderAreaEnabledFunction)(QWindow *window, quintptr identifier, bool enable); (reinterpret_cast(function))(q->window()->windowHandle(), identifier, q->isVisible()); #endif } /*! \internal This is basically QTabBar::initStyleOption() but without the expensive QFontMetrics::elidedText() call. */ void QTabBarPrivate::initBasicStyleOption(QStyleOptionTab *option, int tabIndex) const { Q_Q(const QTabBar); const int totalTabs = tabList.size(); if (!option || (tabIndex < 0 || tabIndex >= totalTabs)) return; const QTabBarPrivate::Tab &tab = tabList.at(tabIndex); option->initFrom(q); option->state &= ~(QStyle::State_HasFocus | QStyle::State_MouseOver); option->rect = q->tabRect(tabIndex); const bool isCurrent = tabIndex == currentIndex; option->row = 0; if (tabIndex == pressedIndex) option->state |= QStyle::State_Sunken; if (isCurrent) option->state |= QStyle::State_Selected; if (isCurrent && q->hasFocus()) option->state |= QStyle::State_HasFocus; if (!tab.enabled) option->state &= ~QStyle::State_Enabled; if (q->isActiveWindow()) option->state |= QStyle::State_Active; if (!dragInProgress && option->rect == hoverRect) option->state |= QStyle::State_MouseOver; option->shape = shape; option->text = tab.text; if (tab.textColor.isValid()) option->palette.setColor(q->foregroundRole(), tab.textColor); option->icon = tab.icon; option->iconSize = q->iconSize(); // Will get the default value then. option->leftButtonSize = tab.leftWidget ? tab.leftWidget->size() : QSize(); option->rightButtonSize = tab.rightWidget ? tab.rightWidget->size() : QSize(); option->documentMode = documentMode; if (tabIndex > 0 && tabIndex - 1 == currentIndex) option->selectedPosition = QStyleOptionTab::PreviousIsSelected; else if (tabIndex + 1 < totalTabs && tabIndex + 1 == currentIndex) option->selectedPosition = QStyleOptionTab::NextIsSelected; else option->selectedPosition = QStyleOptionTab::NotAdjacent; const bool paintBeginning = (tabIndex == 0) || (dragInProgress && tabIndex == pressedIndex + 1); const bool paintEnd = (tabIndex == totalTabs - 1) || (dragInProgress && tabIndex == pressedIndex - 1); if (paintBeginning) { if (paintEnd) option->position = QStyleOptionTab::OnlyOneTab; else option->position = QStyleOptionTab::Beginning; } else if (paintEnd) { option->position = QStyleOptionTab::End; } else { option->position = QStyleOptionTab::Middle; } #if QT_CONFIG(tabwidget) if (const QTabWidget *tw = qobject_cast(q->parentWidget())) { option->features |= QStyleOptionTab::HasFrame; if (tw->cornerWidget(Qt::TopLeftCorner) || tw->cornerWidget(Qt::BottomLeftCorner)) option->cornerWidgets |= QStyleOptionTab::LeftCornerWidget; if (tw->cornerWidget(Qt::TopRightCorner) || tw->cornerWidget(Qt::BottomRightCorner)) option->cornerWidgets |= QStyleOptionTab::RightCornerWidget; } #endif } /*! Initialize \a option with the values from the tab at \a tabIndex. This method is useful for subclasses when they need a QStyleOptionTab, but don't want to fill in all the information themselves. \sa QStyleOption::initFrom(), QTabWidget::initStyleOption() */ void QTabBar::initStyleOption(QStyleOptionTab *option, int tabIndex) const { Q_D(const QTabBar); d->initBasicStyleOption(option, tabIndex); QRect textRect = style()->subElementRect(QStyle::SE_TabBarTabText, option, this); option->text = fontMetrics().elidedText(option->text, d->elideMode, textRect.width(), Qt::TextShowMnemonic); } /*! \class QTabBar \brief The QTabBar class provides a tab bar, e.g. for use in tabbed dialogs. \ingroup basicwidgets \inmodule QtWidgets QTabBar is straightforward to use; it draws the tabs using one of the predefined \l{QTabBar::Shape}{shapes}, and emits a signal when a tab is selected. It can be subclassed to tailor the look and feel. Qt also provides a ready-made \l{QTabWidget}. Each tab has a tabText(), an optional tabIcon(), an optional tabToolTip(), optional tabWhatsThis() and optional tabData(). The tabs's attributes can be changed with setTabText(), setTabIcon(), setTabToolTip(), setTabWhatsThis and setTabData(). Each tabs can be enabled or disabled individually with setTabEnabled(). Each tab can display text in a distinct color. The current text color for a tab can be found with the tabTextColor() function. Set the text color for a particular tab with setTabTextColor(). Tabs are added using addTab(), or inserted at particular positions using insertTab(). The total number of tabs is given by count(). Tabs can be removed from the tab bar with removeTab(). Combining removeTab() and insertTab() allows you to move tabs to different positions. The \l shape property defines the tabs' appearance. The choice of shape is a matter of taste, although tab dialogs (for preferences and similar) invariably use \l RoundedNorth. Tab controls in windows other than dialogs almost always use either \l RoundedSouth or \l TriangularSouth. Many spreadsheets and other tab controls in which all the pages are essentially similar use \l TriangularSouth, whereas \l RoundedSouth is used mostly when the pages are different (e.g. a multi-page tool palette). The default in QTabBar is \l RoundedNorth. The most important part of QTabBar's API is the currentChanged() signal. This is emitted whenever the current tab changes (even at startup, when the current tab changes from 'none'). There is also a slot, setCurrentIndex(), which can be used to select a tab programmatically. The function currentIndex() returns the index of the current tab, \l count holds the number of tabs. QTabBar creates automatic mnemonic keys in the manner of QAbstractButton; e.g. if a tab's label is "\&Graphics", Alt+G becomes a shortcut key for switching to that tab. The following virtual functions may need to be reimplemented in order to tailor the look and feel or store extra data with each tab: \list \li tabSizeHint() calcuates the size of a tab. \li tabInserted() notifies that a new tab was added. \li tabRemoved() notifies that a tab was removed. \li tabLayoutChange() notifies that the tabs have been re-laid out. \li paintEvent() paints all tabs. \endlist For subclasses, you might also need the tabRect() functions which returns the visual geometry of a single tab. \table 100% \row \li \inlineimage fusion-tabbar.png Screenshot of a Fusion style tab bar \li A tab bar shown in the \l{Qt Widget Gallery}{Fusion widget style}. \row \li \inlineimage fusion-tabbar-truncated.png Screenshot of a truncated Fusion tab bar \li A truncated tab bar shown in the Fusion widget style. \endtable \sa QTabWidget */ /*! \enum QTabBar::Shape This enum type lists the built-in shapes supported by QTabBar. Treat these as hints as some styles may not render some of the shapes. However, position should be honored. \value RoundedNorth The normal rounded look above the pages \value RoundedSouth The normal rounded look below the pages \value RoundedWest The normal rounded look on the left side of the pages \value RoundedEast The normal rounded look on the right side the pages \value TriangularNorth Triangular tabs above the pages. \value TriangularSouth Triangular tabs similar to those used in the Excel spreadsheet, for example \value TriangularWest Triangular tabs on the left of the pages. \value TriangularEast Triangular tabs on the right of the pages. */ /*! \fn void QTabBar::currentChanged(int index) This signal is emitted when the tab bar's current tab changes. The new current has the given \a index, or -1 if there isn't a new one (for example, if there are no tab in the QTabBar) */ /*! \fn void QTabBar::tabCloseRequested(int index) \since 4.5 This signal is emitted when the close button on a tab is clicked. The \a index is the index that should be removed. \sa setTabsClosable() */ /*! \fn void QTabBar::tabMoved(int from, int to) \since 4.5 This signal is emitted when the tab has moved the tab at index position \a from to index position \a to. note: QTabWidget will automatically move the page when this signal is emitted from its tab bar. \sa moveTab() */ /*! \fn void QTabBar::tabBarClicked(int index) This signal is emitted when user clicks on a tab at an \a index. \a index is the index of a clicked tab, or -1 if no tab is under the cursor. \since 5.2 */ /*! \fn void QTabBar::tabBarDoubleClicked(int index) This signal is emitted when the user double clicks on a tab at \a index. \a index refers to the tab clicked, or -1 if no tab is under the cursor. \since 5.2 */ void QTabBarPrivate::init() { Q_Q(QTabBar); leftB = new QToolButton(q); leftB->setAutoRepeat(true); QObject::connect(leftB, SIGNAL(clicked()), q, SLOT(_q_scrollTabs())); leftB->hide(); rightB = new QToolButton(q); rightB->setAutoRepeat(true); QObject::connect(rightB, SIGNAL(clicked()), q, SLOT(_q_scrollTabs())); rightB->hide(); #ifdef QT_KEYPAD_NAVIGATION if (QApplication::keypadNavigationEnabled()) { leftB->setFocusPolicy(Qt::NoFocus); rightB->setFocusPolicy(Qt::NoFocus); q->setFocusPolicy(Qt::NoFocus); } else #endif q->setFocusPolicy(Qt::TabFocus); #ifndef QT_NO_ACCESSIBILITY leftB->setAccessibleName(QTabBar::tr("Scroll Left")); rightB->setAccessibleName(QTabBar::tr("Scroll Right")); #endif q->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed); elideMode = Qt::TextElideMode(q->style()->styleHint(QStyle::SH_TabBar_ElideMode, 0, q)); useScrollButtons = !q->style()->styleHint(QStyle::SH_TabBar_PreferNoArrows, 0, q); } QTabBarPrivate::Tab *QTabBarPrivate::at(int index) { return validIndex(index)?&tabList[index]:0; } const QTabBarPrivate::Tab *QTabBarPrivate::at(int index) const { return validIndex(index)?&tabList[index]:0; } int QTabBarPrivate::indexAtPos(const QPoint &p) const { Q_Q(const QTabBar); if (q->tabRect(currentIndex).contains(p)) return currentIndex; for (int i = 0; i < tabList.count(); ++i) if (tabList.at(i).enabled && q->tabRect(i).contains(p)) return i; return -1; } void QTabBarPrivate::layoutTabs() { Q_Q(QTabBar); layoutDirty = false; QSize size = q->size(); int last, available; int maxExtent; int i; bool vertTabs = verticalTabs(shape); int tabChainIndex = 0; Qt::Alignment tabAlignment = Qt::Alignment(q->style()->styleHint(QStyle::SH_TabBar_Alignment, 0, q)); QVector tabChain(tabList.count() + 2); // We put an empty item at the front and back and set its expansive attribute // depending on tabAlignment and expanding. tabChain[tabChainIndex].init(); tabChain[tabChainIndex].expansive = (!expanding) && (tabAlignment != Qt::AlignLeft) && (tabAlignment != Qt::AlignJustify); tabChain[tabChainIndex].empty = true; ++tabChainIndex; // We now go through our list of tabs and set the minimum size and the size hint // This will allow us to elide text if necessary. Since we don't set // a maximum size, tabs will EXPAND to fill up the empty space. // Since tab widget is rather *ahem* strict about keeping the geometry of the // tab bar to its absolute minimum, this won't bleed through, but will show up // if you use tab bar on its own (a.k.a. not a bug, but a feature). // Update: if expanding is false, we DO set a maximum size to prevent the tabs // being wider than necessary. if (!vertTabs) { int minx = 0; int x = 0; int maxHeight = 0; for (i = 0; i < tabList.count(); ++i, ++tabChainIndex) { QSize sz = q->tabSizeHint(i); tabList[i].maxRect = QRect(x, 0, sz.width(), sz.height()); x += sz.width(); maxHeight = qMax(maxHeight, sz.height()); sz = q->minimumTabSizeHint(i); tabList[i].minRect = QRect(minx, 0, sz.width(), sz.height()); minx += sz.width(); tabChain[tabChainIndex].init(); tabChain[tabChainIndex].sizeHint = tabList.at(i).maxRect.width(); tabChain[tabChainIndex].minimumSize = sz.width(); tabChain[tabChainIndex].empty = false; tabChain[tabChainIndex].expansive = true; if (!expanding) tabChain[tabChainIndex].maximumSize = tabChain[tabChainIndex].sizeHint; } last = minx; available = size.width(); maxExtent = maxHeight; } else { int miny = 0; int y = 0; int maxWidth = 0; for (i = 0; i < tabList.count(); ++i, ++tabChainIndex) { QSize sz = q->tabSizeHint(i); tabList[i].maxRect = QRect(0, y, sz.width(), sz.height()); y += sz.height(); maxWidth = qMax(maxWidth, sz.width()); sz = q->minimumTabSizeHint(i); tabList[i].minRect = QRect(0, miny, sz.width(), sz.height()); miny += sz.height(); tabChain[tabChainIndex].init(); tabChain[tabChainIndex].sizeHint = tabList.at(i).maxRect.height(); tabChain[tabChainIndex].minimumSize = sz.height(); tabChain[tabChainIndex].empty = false; tabChain[tabChainIndex].expansive = true; if (!expanding) tabChain[tabChainIndex].maximumSize = tabChain[tabChainIndex].sizeHint; } last = miny; available = size.height(); maxExtent = maxWidth; } // Mirror our front item. tabChain[tabChainIndex].init(); tabChain[tabChainIndex].expansive = (!expanding) && (tabAlignment != Qt::AlignRight) && (tabAlignment != Qt::AlignJustify); tabChain[tabChainIndex].empty = true; Q_ASSERT(tabChainIndex == tabChain.count() - 1); // add an assert just to make sure. // Do the calculation qGeomCalc(tabChain, 0, tabChain.count(), 0, qMax(available, last), 0); // Use the results for (i = 0; i < tabList.count(); ++i) { const QLayoutStruct &lstruct = tabChain.at(i + 1); if (!vertTabs) tabList[i].rect.setRect(lstruct.pos, 0, lstruct.size, maxExtent); else tabList[i].rect.setRect(0, lstruct.pos, maxExtent, lstruct.size); } if (useScrollButtons && tabList.count() && last > available) { const QRect scrollRect = normalizedScrollRect(0); scrollOffset = -scrollRect.left(); Q_Q(QTabBar); QStyleOption opt; opt.init(q); QRect scrollButtonLeftRect = q->style()->subElementRect(QStyle::SE_TabBarScrollLeftButton, &opt, q); QRect scrollButtonRightRect = q->style()->subElementRect(QStyle::SE_TabBarScrollRightButton, &opt, q); int scrollButtonWidth = q->style()->pixelMetric(QStyle::PM_TabBarScrollButtonWidth, &opt, q); // Normally SE_TabBarScrollLeftButton should have the same width as PM_TabBarScrollButtonWidth. // But if that is not the case, we set the actual button width to PM_TabBarScrollButtonWidth, and // use the extra space from SE_TabBarScrollLeftButton as margins towards the tabs. if (vertTabs) { scrollButtonLeftRect.setHeight(scrollButtonWidth); scrollButtonRightRect.setY(scrollButtonRightRect.bottom() + 1 - scrollButtonWidth); scrollButtonRightRect.setHeight(scrollButtonWidth); leftB->setArrowType(Qt::UpArrow); rightB->setArrowType(Qt::DownArrow); } else if (q->layoutDirection() == Qt::RightToLeft) { scrollButtonRightRect.setWidth(scrollButtonWidth); scrollButtonLeftRect.setX(scrollButtonLeftRect.right() + 1 - scrollButtonWidth); scrollButtonLeftRect.setWidth(scrollButtonWidth); leftB->setArrowType(Qt::RightArrow); rightB->setArrowType(Qt::LeftArrow); } else { scrollButtonLeftRect.setWidth(scrollButtonWidth); scrollButtonRightRect.setX(scrollButtonRightRect.right() + 1 - scrollButtonWidth); scrollButtonRightRect.setWidth(scrollButtonWidth); leftB->setArrowType(Qt::LeftArrow); rightB->setArrowType(Qt::RightArrow); } leftB->setGeometry(scrollButtonLeftRect); leftB->setEnabled(false); leftB->show(); rightB->setGeometry(scrollButtonRightRect); rightB->setEnabled(last - scrollOffset > scrollRect.x() + scrollRect.width()); rightB->show(); } else { scrollOffset = 0; rightB->hide(); leftB->hide(); } layoutWidgets(); q->tabLayoutChange(); } QRect QTabBarPrivate::normalizedScrollRect(int index) { // "Normalized scroll rect" means return the free space on the tab bar // that doesn't overlap with scroll buttons or tear indicators, and // always return the rect as horizontal Qt::LeftToRight, even if the // tab bar itself is in a different orientation. Q_Q(QTabBar); QStyleOptionTab opt; q->initStyleOption(&opt, currentIndex); opt.rect = q->rect(); QRect scrollButtonLeftRect = q->style()->subElementRect(QStyle::SE_TabBarScrollLeftButton, &opt, q); QRect scrollButtonRightRect = q->style()->subElementRect(QStyle::SE_TabBarScrollRightButton, &opt, q); QRect tearLeftRect = q->style()->subElementRect(QStyle::SE_TabBarTearIndicatorLeft, &opt, q); QRect tearRightRect = q->style()->subElementRect(QStyle::SE_TabBarTearIndicatorRight, &opt, q); if (verticalTabs(shape)) { int topEdge, bottomEdge; bool leftButtonIsOnTop = scrollButtonLeftRect.y() < q->height() / 2; bool rightButtonIsOnTop = scrollButtonRightRect.y() < q->height() / 2; if (leftButtonIsOnTop && rightButtonIsOnTop) { topEdge = scrollButtonRightRect.bottom() + 1; bottomEdge = q->height(); } else if (!leftButtonIsOnTop && !rightButtonIsOnTop) { topEdge = 0; bottomEdge = scrollButtonLeftRect.top(); } else { topEdge = scrollButtonLeftRect.bottom() + 1; bottomEdge = scrollButtonRightRect.top(); } bool tearTopVisible = index != 0 && topEdge != -scrollOffset; bool tearBottomVisible = index != tabList.size() - 1 && bottomEdge != tabList.constLast().rect.bottom() + 1 - scrollOffset; if (tearTopVisible && !tearLeftRect.isNull()) topEdge = tearLeftRect.bottom() + 1; if (tearBottomVisible && !tearRightRect.isNull()) bottomEdge = tearRightRect.top(); return QRect(topEdge, 0, bottomEdge - topEdge, q->height()); } else { if (q->layoutDirection() == Qt::RightToLeft) { scrollButtonLeftRect = QStyle::visualRect(Qt::RightToLeft, q->rect(), scrollButtonLeftRect); scrollButtonRightRect = QStyle::visualRect(Qt::RightToLeft, q->rect(), scrollButtonRightRect); tearLeftRect = QStyle::visualRect(Qt::RightToLeft, q->rect(), tearLeftRect); tearRightRect = QStyle::visualRect(Qt::RightToLeft, q->rect(), tearRightRect); } int leftEdge, rightEdge; bool leftButtonIsOnLeftSide = scrollButtonLeftRect.x() < q->width() / 2; bool rightButtonIsOnLeftSide = scrollButtonRightRect.x() < q->width() / 2; if (leftButtonIsOnLeftSide && rightButtonIsOnLeftSide) { leftEdge = scrollButtonRightRect.right() + 1; rightEdge = q->width(); } else if (!leftButtonIsOnLeftSide && !rightButtonIsOnLeftSide) { leftEdge = 0; rightEdge = scrollButtonLeftRect.left(); } else { leftEdge = scrollButtonLeftRect.right() + 1; rightEdge = scrollButtonRightRect.left(); } bool tearLeftVisible = index != 0 && leftEdge != -scrollOffset; bool tearRightVisible = index != tabList.size() - 1 && rightEdge != tabList.constLast().rect.right() + 1 - scrollOffset; if (tearLeftVisible && !tearLeftRect.isNull()) leftEdge = tearLeftRect.right() + 1; if (tearRightVisible && !tearRightRect.isNull()) rightEdge = tearRightRect.left(); return QRect(leftEdge, 0, rightEdge - leftEdge, q->height()); } } int QTabBarPrivate::hoveredTabIndex() const { if (dragInProgress) return currentIndex; if (hoverIndex >= 0) return hoverIndex; return -1; } void QTabBarPrivate::makeVisible(int index) { Q_Q(QTabBar); if (!validIndex(index) || leftB->isHidden()) return; const QRect tabRect = tabList.at(index).rect; const int oldScrollOffset = scrollOffset; const bool horiz = !verticalTabs(shape); const int tabStart = horiz ? tabRect.left() : tabRect.top(); const int tabEnd = horiz ? tabRect.right() : tabRect.bottom(); const int lastTabEnd = horiz ? tabList.constLast().rect.right() : tabList.constLast().rect.bottom(); const QRect scrollRect = normalizedScrollRect(index); const int scrolledTabBarStart = qMax(1, scrollRect.left() + scrollOffset); const int scrolledTabBarEnd = qMin(lastTabEnd - 1, scrollRect.right() + scrollOffset); if (tabStart < scrolledTabBarStart) { // Tab is outside on the left, so scroll left. scrollOffset = tabStart - scrollRect.left(); } else if (tabEnd > scrolledTabBarEnd) { // Tab is outside on the right, so scroll right. scrollOffset = tabEnd - scrollRect.right(); } leftB->setEnabled(scrollOffset > -scrollRect.left()); rightB->setEnabled(scrollOffset < lastTabEnd - scrollRect.right()); if (oldScrollOffset != scrollOffset) { q->update(); layoutWidgets(); } } void QTabBarPrivate::killSwitchTabTimer() { Q_Q(QTabBar); if (switchTabTimerId) { q->killTimer(switchTabTimerId); switchTabTimerId = 0; } switchTabCurrentIndex = -1; } void QTabBarPrivate::layoutTab(int index) { Q_Q(QTabBar); Q_ASSERT(index >= 0); Tab &tab = tabList[index]; bool vertical = verticalTabs(shape); if (!(tab.leftWidget || tab.rightWidget)) return; QStyleOptionTab opt; q->initStyleOption(&opt, index); if (tab.leftWidget) { QRect rect = q->style()->subElementRect(QStyle::SE_TabBarTabLeftButton, &opt, q); QPoint p = rect.topLeft(); if ((index == pressedIndex) || paintWithOffsets) { if (vertical) p.setY(p.y() + tabList[index].dragOffset); else p.setX(p.x() + tabList[index].dragOffset); } tab.leftWidget->move(p); } if (tab.rightWidget) { QRect rect = q->style()->subElementRect(QStyle::SE_TabBarTabRightButton, &opt, q); QPoint p = rect.topLeft(); if ((index == pressedIndex) || paintWithOffsets) { if (vertical) p.setY(p.y() + tab.dragOffset); else p.setX(p.x() + tab.dragOffset); } tab.rightWidget->move(p); } } void QTabBarPrivate::layoutWidgets(int start) { Q_Q(QTabBar); for (int i = start; i < q->count(); ++i) { layoutTab(i); } } void QTabBarPrivate::autoHideTabs() { Q_Q(QTabBar); if (autoHide) q->setVisible(q->count() > 1); } void QTabBarPrivate::_q_closeTab() { Q_Q(QTabBar); QObject *object = q->sender(); int tabToClose = -1; QTabBar::ButtonPosition closeSide = (QTabBar::ButtonPosition)q->style()->styleHint(QStyle::SH_TabBar_CloseButtonPosition, 0, q); for (int i = 0; i < tabList.count(); ++i) { if (closeSide == QTabBar::LeftSide) { if (tabList.at(i).leftWidget == object) { tabToClose = i; break; } } else { if (tabList.at(i).rightWidget == object) { tabToClose = i; break; } } } if (tabToClose != -1) emit q->tabCloseRequested(tabToClose); } void QTabBarPrivate::_q_scrollTabs() { Q_Q(QTabBar); const QObject *sender = q->sender(); const bool horizontal = !verticalTabs(shape); const QRect scrollRect = normalizedScrollRect(); int i = -1; if (sender == leftB) { for (i = tabList.count() - 1; i >= 0; --i) { int start = horizontal ? tabList.at(i).rect.left() : tabList.at(i).rect.top(); if (start < scrollRect.left() + scrollOffset) { makeVisible(i); return; } } } else if (sender == rightB) { for (i = 0; i < tabList.count(); ++i) { int end = horizontal ? tabList.at(i).rect.right() : tabList.at(i).rect.bottom(); if (end > scrollRect.right() + scrollOffset) { makeVisible(i); return; } } } } void QTabBarPrivate::refresh() { Q_Q(QTabBar); // be safe in case a subclass is also handling move with the tabs if (pressedIndex != -1 && movable && QApplication::mouseButtons() == Qt::NoButton) { moveTabFinished(pressedIndex); if (!validIndex(pressedIndex)) pressedIndex = -1; } if (!q->isVisible()) { layoutDirty = true; } else { layoutTabs(); makeVisible(currentIndex); q->update(); q->updateGeometry(); } } /*! Creates a new tab bar with the given \a parent. */ QTabBar::QTabBar(QWidget* parent) :QWidget(*new QTabBarPrivate, parent, 0) { Q_D(QTabBar); d->init(); } /*! Destroys the tab bar. */ QTabBar::~QTabBar() { } /*! \property QTabBar::shape \brief the shape of the tabs in the tab bar Possible values for this property are described by the Shape enum. */ QTabBar::Shape QTabBar::shape() const { Q_D(const QTabBar); return d->shape; } void QTabBar::setShape(Shape shape) { Q_D(QTabBar); if (d->shape == shape) return; d->shape = shape; d->refresh(); } /*! \property QTabBar::drawBase \brief defines whether or not tab bar should draw its base. If true then QTabBar draws a base in relation to the styles overlab. Otherwise only the tabs are drawn. \sa QStyle::pixelMetric(), QStyle::PM_TabBarBaseOverlap, QStyleOptionTabBarBase */ void QTabBar::setDrawBase(bool drawBase) { Q_D(QTabBar); if (d->drawBase == drawBase) return; d->drawBase = drawBase; update(); } bool QTabBar::drawBase() const { Q_D(const QTabBar); return d->drawBase; } /*! Adds a new tab with text \a text. Returns the new tab's index. */ int QTabBar::addTab(const QString &text) { return insertTab(-1, text); } /*! \overload Adds a new tab with icon \a icon and text \a text. Returns the new tab's index. */ int QTabBar::addTab(const QIcon& icon, const QString &text) { return insertTab(-1, icon, text); } /*! Inserts a new tab with text \a text at position \a index. If \a index is out of range, the new tab is appened. Returns the new tab's index. */ int QTabBar::insertTab(int index, const QString &text) { return insertTab(index, QIcon(), text); } /*!\overload Inserts a new tab with icon \a icon and text \a text at position \a index. If \a index is out of range, the new tab is appended. Returns the new tab's index. If the QTabBar was empty before this function is called, the inserted tab becomes the current tab. Inserting a new tab at an index less than or equal to the current index will increment the current index, but keep the current tab. */ int QTabBar::insertTab(int index, const QIcon& icon, const QString &text) { Q_D(QTabBar); if (!d->validIndex(index)) { index = d->tabList.count(); d->tabList.append(QTabBarPrivate::Tab(icon, text)); } else { d->tabList.insert(index, QTabBarPrivate::Tab(icon, text)); } #ifndef QT_NO_SHORTCUT d->tabList[index].shortcutId = grabShortcut(QKeySequence::mnemonic(text)); #endif d->refresh(); if (d->tabList.count() == 1) setCurrentIndex(index); else if (index <= d->currentIndex) ++d->currentIndex; if (d->closeButtonOnTabs) { QStyleOptionTab opt; initStyleOption(&opt, index); ButtonPosition closeSide = (ButtonPosition)style()->styleHint(QStyle::SH_TabBar_CloseButtonPosition, 0, this); QAbstractButton *closeButton = new CloseButton(this); connect(closeButton, SIGNAL(clicked()), this, SLOT(_q_closeTab())); setTabButton(index, closeSide, closeButton); } for (int i = 0; i < d->tabList.count(); ++i) { if (d->tabList[i].lastTab >= index) ++d->tabList[i].lastTab; } tabInserted(index); d->autoHideTabs(); return index; } /*! Removes the tab at position \a index. \sa SelectionBehavior */ void QTabBar::removeTab(int index) { Q_D(QTabBar); if (d->validIndex(index)) { if (d->dragInProgress) d->moveTabFinished(d->pressedIndex); #ifndef QT_NO_SHORTCUT releaseShortcut(d->tabList.at(index).shortcutId); #endif if (d->tabList[index].leftWidget) { d->tabList[index].leftWidget->hide(); d->tabList[index].leftWidget->deleteLater(); d->tabList[index].leftWidget = 0; } if (d->tabList[index].rightWidget) { d->tabList[index].rightWidget->hide(); d->tabList[index].rightWidget->deleteLater(); d->tabList[index].rightWidget = 0; } int newIndex = d->tabList[index].lastTab; d->tabList.removeAt(index); for (int i = 0; i < d->tabList.count(); ++i) { if (d->tabList[i].lastTab == index) d->tabList[i].lastTab = -1; if (d->tabList[i].lastTab > index) --d->tabList[i].lastTab; } if (index == d->currentIndex) { // The current tab is going away, in order to make sure // we emit that "current has changed", we need to reset this // around. d->currentIndex = -1; if (d->tabList.size() > 0) { switch(d->selectionBehaviorOnRemove) { case SelectPreviousTab: if (newIndex > index) newIndex--; if (d->validIndex(newIndex)) break; Q_FALLTHROUGH(); case SelectRightTab: newIndex = index; if (newIndex >= d->tabList.size()) newIndex = d->tabList.size() - 1; break; case SelectLeftTab: newIndex = index - 1; if (newIndex < 0) newIndex = 0; break; default: break; } if (d->validIndex(newIndex)) { // don't loose newIndex's old through setCurrentIndex int bump = d->tabList[newIndex].lastTab; setCurrentIndex(newIndex); d->tabList[newIndex].lastTab = bump; } } else { emit currentChanged(-1); } } else if (index < d->currentIndex) { setCurrentIndex(d->currentIndex - 1); } d->refresh(); d->autoHideTabs(); if (!d->hoverRect.isEmpty()) { for (int i = 0; i < d->tabList.count(); ++i) { const QRect area = tabRect(i); if (area.contains(mapFromGlobal(QCursor::pos()))) { d->hoverIndex = i; d->hoverRect = area; break; } } update(d->hoverRect); } tabRemoved(index); } } /*! Returns \c true if the tab at position \a index is enabled; otherwise returns \c false. */ bool QTabBar::isTabEnabled(int index) const { Q_D(const QTabBar); if (const QTabBarPrivate::Tab *tab = d->at(index)) return tab->enabled; return false; } /*! If \a enabled is true then the tab at position \a index is enabled; otherwise the item at position \a index is disabled. */ void QTabBar::setTabEnabled(int index, bool enabled) { Q_D(QTabBar); if (QTabBarPrivate::Tab *tab = d->at(index)) { tab->enabled = enabled; #ifndef QT_NO_SHORTCUT setShortcutEnabled(tab->shortcutId, enabled); #endif update(); if (!enabled && index == d->currentIndex) setCurrentIndex(d->validIndex(index+1)?index+1:0); else if (enabled && !d->validIndex(d->currentIndex)) setCurrentIndex(index); } } /*! Returns the text of the tab at position \a index, or an empty string if \a index is out of range. */ QString QTabBar::tabText(int index) const { Q_D(const QTabBar); if (const QTabBarPrivate::Tab *tab = d->at(index)) return tab->text; return QString(); } /*! Sets the text of the tab at position \a index to \a text. */ void QTabBar::setTabText(int index, const QString &text) { Q_D(QTabBar); if (QTabBarPrivate::Tab *tab = d->at(index)) { d->textSizes.remove(tab->text); tab->text = text; #ifndef QT_NO_SHORTCUT releaseShortcut(tab->shortcutId); tab->shortcutId = grabShortcut(QKeySequence::mnemonic(text)); setShortcutEnabled(tab->shortcutId, tab->enabled); #endif d->refresh(); } } /*! Returns the text color of the tab with the given \a index, or a invalid color if \a index is out of range. \sa setTabTextColor() */ QColor QTabBar::tabTextColor(int index) const { Q_D(const QTabBar); if (const QTabBarPrivate::Tab *tab = d->at(index)) return tab->textColor; return QColor(); } /*! Sets the color of the text in the tab with the given \a index to the specified \a color. If an invalid color is specified, the tab will use the QTabBar foreground role instead. \sa tabTextColor() */ void QTabBar::setTabTextColor(int index, const QColor &color) { Q_D(QTabBar); if (QTabBarPrivate::Tab *tab = d->at(index)) { tab->textColor = color; update(tabRect(index)); } } /*! Returns the icon of the tab at position \a index, or a null icon if \a index is out of range. */ QIcon QTabBar::tabIcon(int index) const { Q_D(const QTabBar); if (const QTabBarPrivate::Tab *tab = d->at(index)) return tab->icon; return QIcon(); } /*! Sets the icon of the tab at position \a index to \a icon. */ void QTabBar::setTabIcon(int index, const QIcon & icon) { Q_D(QTabBar); if (QTabBarPrivate::Tab *tab = d->at(index)) { bool simpleIconChange = (!icon.isNull() && !tab->icon.isNull()); tab->icon = icon; if (simpleIconChange) update(tabRect(index)); else d->refresh(); } } #ifndef QT_NO_TOOLTIP /*! Sets the tool tip of the tab at position \a index to \a tip. */ void QTabBar::setTabToolTip(int index, const QString & tip) { Q_D(QTabBar); if (QTabBarPrivate::Tab *tab = d->at(index)) tab->toolTip = tip; } /*! Returns the tool tip of the tab at position \a index, or an empty string if \a index is out of range. */ QString QTabBar::tabToolTip(int index) const { Q_D(const QTabBar); if (const QTabBarPrivate::Tab *tab = d->at(index)) return tab->toolTip; return QString(); } #endif // QT_NO_TOOLTIP #if QT_CONFIG(whatsthis) /*! \since 4.1 Sets the What's This help text of the tab at position \a index to \a text. */ void QTabBar::setTabWhatsThis(int index, const QString &text) { Q_D(QTabBar); if (QTabBarPrivate::Tab *tab = d->at(index)) tab->whatsThis = text; } /*! \since 4.1 Returns the What's This help text of the tab at position \a index, or an empty string if \a index is out of range. */ QString QTabBar::tabWhatsThis(int index) const { Q_D(const QTabBar); if (const QTabBarPrivate::Tab *tab = d->at(index)) return tab->whatsThis; return QString(); } #endif // QT_CONFIG(whatsthis) /*! Sets the data of the tab at position \a index to \a data. */ void QTabBar::setTabData(int index, const QVariant & data) { Q_D(QTabBar); if (QTabBarPrivate::Tab *tab = d->at(index)) tab->data = data; } /*! Returns the data of the tab at position \a index, or a null variant if \a index is out of range. */ QVariant QTabBar::tabData(int index) const { Q_D(const QTabBar); if (const QTabBarPrivate::Tab *tab = d->at(index)) return tab->data; return QVariant(); } /*! Returns the visual rectangle of the tab at position \a index, or a null rectangle if \a index is out of range. */ QRect QTabBar::tabRect(int index) const { Q_D(const QTabBar); if (const QTabBarPrivate::Tab *tab = d->at(index)) { if (d->layoutDirty) const_cast(d)->layoutTabs(); QRect r = tab->rect; if (verticalTabs(d->shape)) r.translate(0, -d->scrollOffset); else r.translate(-d->scrollOffset, 0); if (!verticalTabs(d->shape)) r = QStyle::visualRect(layoutDirection(), rect(), r); return r; } return QRect(); } /*! \since 4.3 Returns the index of the tab that covers \a position or -1 if no tab covers \a position; */ int QTabBar::tabAt(const QPoint &position) const { Q_D(const QTabBar); if (d->validIndex(d->currentIndex) && tabRect(d->currentIndex).contains(position)) { return d->currentIndex; } const int max = d->tabList.size(); for (int i = 0; i < max; ++i) { if (tabRect(i).contains(position)) { return i; } } return -1; } /*! \property QTabBar::currentIndex \brief the index of the tab bar's visible tab The current index is -1 if there is no current tab. */ int QTabBar::currentIndex() const { Q_D(const QTabBar); if (d->validIndex(d->currentIndex)) return d->currentIndex; return -1; } void QTabBar::setCurrentIndex(int index) { Q_D(QTabBar); if (d->dragInProgress && d->pressedIndex != -1) return; int oldIndex = d->currentIndex; if (d->validIndex(index) && d->currentIndex != index) { d->currentIndex = index; update(); d->makeVisible(index); d->tabList[index].lastTab = oldIndex; if (oldIndex >= 0 && oldIndex < count()) d->layoutTab(oldIndex); d->layoutTab(index); #ifndef QT_NO_ACCESSIBILITY if (QAccessible::isActive()) { if (hasFocus()) { QAccessibleEvent focusEvent(this, QAccessible::Focus); focusEvent.setChild(index); QAccessible::updateAccessibility(&focusEvent); } QAccessibleEvent selectionEvent(this, QAccessible::Selection); selectionEvent.setChild(index); QAccessible::updateAccessibility(&selectionEvent); } #endif emit currentChanged(index); } } /*! \property QTabBar::iconSize \brief The size for icons in the tab bar \since 4.1 The default value is style-dependent. \c iconSize is a maximum size; icons that are smaller are not scaled up. \sa QTabWidget::iconSize */ QSize QTabBar::iconSize() const { Q_D(const QTabBar); if (d->iconSize.isValid()) return d->iconSize; int iconExtent = style()->pixelMetric(QStyle::PM_TabBarIconSize, 0, this); return QSize(iconExtent, iconExtent); } void QTabBar::setIconSize(const QSize &size) { Q_D(QTabBar); d->iconSize = size; d->layoutDirty = true; update(); updateGeometry(); } /*! \property QTabBar::count \brief the number of tabs in the tab bar */ int QTabBar::count() const { Q_D(const QTabBar); return d->tabList.count(); } /*!\reimp */ QSize QTabBar::sizeHint() const { Q_D(const QTabBar); if (d->layoutDirty) const_cast(d)->layoutTabs(); QRect r; for (int i = 0; i < d->tabList.count(); ++i) r = r.united(d->tabList.at(i).maxRect); QSize sz = QApplication::globalStrut(); return r.size().expandedTo(sz); } /*!\reimp */ QSize QTabBar::minimumSizeHint() const { Q_D(const QTabBar); if (d->layoutDirty) const_cast(d)->layoutTabs(); if (!d->useScrollButtons) { QRect r; for (int i = 0; i < d->tabList.count(); ++i) r = r.united(d->tabList.at(i).minRect); return r.size().expandedTo(QApplication::globalStrut()); } if (verticalTabs(d->shape)) return QSize(sizeHint().width(), d->rightB->sizeHint().height() * 2 + 75); else return QSize(d->rightB->sizeHint().width() * 2 + 75, sizeHint().height()); } // Compute the most-elided possible text, for minimumSizeHint static QString computeElidedText(Qt::TextElideMode mode, const QString &text) { if (text.length() <= 3) return text; static const QLatin1String Ellipses("..."); QString ret; switch (mode) { case Qt::ElideRight: ret = text.leftRef(2) + Ellipses; break; case Qt::ElideMiddle: ret = text.leftRef(1) + Ellipses + text.rightRef(1); break; case Qt::ElideLeft: ret = Ellipses + text.rightRef(2); break; case Qt::ElideNone: ret = text; break; } return ret; } /*! Returns the minimum tab size hint for the tab at position \a index. \since 5.0 */ QSize QTabBar::minimumTabSizeHint(int index) const { Q_D(const QTabBar); QTabBarPrivate::Tab &tab = const_cast(d->tabList[index]); QString oldText = tab.text; tab.text = computeElidedText(d->elideMode, oldText); QSize size = tabSizeHint(index); tab.text = oldText; return size; } /*! Returns the size hint for the tab at position \a index. */ QSize QTabBar::tabSizeHint(int index) const { //Note: this must match with the computations in QCommonStylePrivate::tabLayout Q_D(const QTabBar); if (const QTabBarPrivate::Tab *tab = d->at(index)) { QStyleOptionTab opt; d->initBasicStyleOption(&opt, index); opt.text = d->tabList.at(index).text; QSize iconSize = tab->icon.isNull() ? QSize(0, 0) : opt.iconSize; int hframe = style()->pixelMetric(QStyle::PM_TabBarTabHSpace, &opt, this); int vframe = style()->pixelMetric(QStyle::PM_TabBarTabVSpace, &opt, this); const QFontMetrics fm = fontMetrics(); int maxWidgetHeight = qMax(opt.leftButtonSize.height(), opt.rightButtonSize.height()); int maxWidgetWidth = qMax(opt.leftButtonSize.width(), opt.rightButtonSize.width()); int widgetWidth = 0; int widgetHeight = 0; int padding = 0; if (!opt.leftButtonSize.isEmpty()) { padding += 4; widgetWidth += opt.leftButtonSize.width(); widgetHeight += opt.leftButtonSize.height(); } if (!opt.rightButtonSize.isEmpty()) { padding += 4; widgetWidth += opt.rightButtonSize.width(); widgetHeight += opt.rightButtonSize.height(); } if (!opt.icon.isNull()) padding += 4; QHash::iterator it = d->textSizes.find(tab->text); if (it == d->textSizes.end()) it = d->textSizes.insert(tab->text, fm.size(Qt::TextShowMnemonic, tab->text)); const int textWidth = it.value().width(); QSize csz; if (verticalTabs(d->shape)) { csz = QSize( qMax(maxWidgetWidth, qMax(fm.height(), iconSize.height())) + vframe, textWidth + iconSize.width() + hframe + widgetHeight + padding); } else { csz = QSize(textWidth + iconSize.width() + hframe + widgetWidth + padding, qMax(maxWidgetHeight, qMax(fm.height(), iconSize.height())) + vframe); } QSize retSize = style()->sizeFromContents(QStyle::CT_TabBarTab, &opt, csz, this); return retSize; } return QSize(); } /*! This virtual handler is called after a new tab was added or inserted at position \a index. \sa tabRemoved() */ void QTabBar::tabInserted(int index) { Q_UNUSED(index) } /*! This virtual handler is called after a tab was removed from position \a index. \sa tabInserted() */ void QTabBar::tabRemoved(int index) { Q_UNUSED(index) } /*! This virtual handler is called whenever the tab layout changes. \sa tabRect() */ void QTabBar::tabLayoutChange() { } /*!\reimp */ void QTabBar::showEvent(QShowEvent *) { Q_D(QTabBar); if (d->layoutDirty) d->refresh(); if (!d->validIndex(d->currentIndex)) setCurrentIndex(0); d->updateMacBorderMetrics(); } /*!\reimp */ void QTabBar::hideEvent(QHideEvent *) { Q_D(QTabBar); d->updateMacBorderMetrics(); } /*!\reimp */ bool QTabBar::event(QEvent *event) { Q_D(QTabBar); if (event->type() == QEvent::HoverMove || event->type() == QEvent::HoverEnter) { QHoverEvent *he = static_cast(event); if (!d->hoverRect.contains(he->pos())) { QRect oldHoverRect = d->hoverRect; bool cursorOverTabs = false; for (int i = 0; i < d->tabList.count(); ++i) { QRect area = tabRect(i); if (area.contains(he->pos())) { d->hoverIndex = i; d->hoverRect = area; cursorOverTabs = true; break; } } if (!cursorOverTabs) { d->hoverIndex = -1; d->hoverRect = QRect(); } if (he->oldPos() != QPoint(-1, -1)) update(oldHoverRect); update(d->hoverRect); } return true; } else if (event->type() == QEvent::HoverLeave) { QRect oldHoverRect = d->hoverRect; d->hoverIndex = -1; d->hoverRect = QRect(); update(oldHoverRect); return true; #ifndef QT_NO_TOOLTIP } else if (event->type() == QEvent::ToolTip) { if (const QTabBarPrivate::Tab *tab = d->at(tabAt(static_cast(event)->pos()))) { if (!tab->toolTip.isEmpty()) { QToolTip::showText(static_cast(event)->globalPos(), tab->toolTip, this); return true; } } #endif // QT_NO_TOOLTIP #if QT_CONFIG(whatsthis) } else if (event->type() == QEvent::QueryWhatsThis) { const QTabBarPrivate::Tab *tab = d->at(d->indexAtPos(static_cast(event)->pos())); if (!tab || tab->whatsThis.isEmpty()) event->ignore(); return true; } else if (event->type() == QEvent::WhatsThis) { if (const QTabBarPrivate::Tab *tab = d->at(d->indexAtPos(static_cast(event)->pos()))) { if (!tab->whatsThis.isEmpty()) { QWhatsThis::showText(static_cast(event)->globalPos(), tab->whatsThis, this); return true; } } #endif // QT_CONFIG(whatsthis) #ifndef QT_NO_SHORTCUT } else if (event->type() == QEvent::Shortcut) { QShortcutEvent *se = static_cast(event); for (int i = 0; i < d->tabList.count(); ++i) { const QTabBarPrivate::Tab *tab = &d->tabList.at(i); if (tab->shortcutId == se->shortcutId()) { setCurrentIndex(i); return true; } } #endif } else if (event->type() == QEvent::MouseButtonDblClick) { // ### fixme Qt 6: move to mouseDoubleClickEvent(), here for BC reasons. const QPoint pos = static_cast(event)->pos(); const bool isEventInCornerButtons = (!d->leftB->isHidden() && d->leftB->geometry().contains(pos)) || (!d->rightB->isHidden() && d->rightB->geometry().contains(pos)); if (!isEventInCornerButtons) emit tabBarDoubleClicked(tabAt(pos)); } else if (event->type() == QEvent::Move) { d->updateMacBorderMetrics(); return QWidget::event(event); #if QT_CONFIG(draganddrop) } else if (event->type() == QEvent::DragEnter) { if (d->changeCurrentOnDrag) event->accept(); } else if (event->type() == QEvent::DragMove) { if (d->changeCurrentOnDrag) { const int tabIndex = tabAt(static_cast(event)->pos()); if (isTabEnabled(tabIndex) && d->switchTabCurrentIndex != tabIndex) { d->switchTabCurrentIndex = tabIndex; if (d->switchTabTimerId) killTimer(d->switchTabTimerId); d->switchTabTimerId = startTimer(style()->styleHint(QStyle::SH_TabBar_ChangeCurrentDelay)); } event->ignore(); } } else if (event->type() == QEvent::DragLeave || event->type() == QEvent::Drop) { d->killSwitchTabTimer(); event->ignore(); #endif } return QWidget::event(event); } /*!\reimp */ void QTabBar::resizeEvent(QResizeEvent *) { Q_D(QTabBar); if (d->layoutDirty) updateGeometry(); d->layoutTabs(); d->makeVisible(d->currentIndex); } /*!\reimp */ void QTabBar::paintEvent(QPaintEvent *) { Q_D(QTabBar); QStyleOptionTabBarBase optTabBase; QTabBarPrivate::initStyleBaseOption(&optTabBase, this, size()); QStylePainter p(this); int selected = -1; int cutLeft = -1; int cutRight = -1; bool vertical = verticalTabs(d->shape); QStyleOptionTab cutTabLeft; QStyleOptionTab cutTabRight; selected = d->currentIndex; if (d->dragInProgress) selected = d->pressedIndex; const QRect scrollRect = d->normalizedScrollRect(); for (int i = 0; i < d->tabList.count(); ++i) optTabBase.tabBarRect |= tabRect(i); optTabBase.selectedTabRect = tabRect(selected); if (d->drawBase) p.drawPrimitive(QStyle::PE_FrameTabBarBase, optTabBase); for (int i = 0; i < d->tabList.count(); ++i) { QStyleOptionTab tab; initStyleOption(&tab, i); if (d->paintWithOffsets && d->tabList[i].dragOffset != 0) { if (vertical) { tab.rect.moveTop(tab.rect.y() + d->tabList[i].dragOffset); } else { tab.rect.moveLeft(tab.rect.x() + d->tabList[i].dragOffset); } } if (!(tab.state & QStyle::State_Enabled)) { tab.palette.setCurrentColorGroup(QPalette::Disabled); } // If this tab is partially obscured, make a note of it so that we can pass the information // along when we draw the tear. QRect tabRect = d->tabList[i].rect; int tabStart = vertical ? tabRect.top() : tabRect.left(); int tabEnd = vertical ? tabRect.bottom() : tabRect.right(); if (tabStart < scrollRect.left() + d->scrollOffset) { cutLeft = i; cutTabLeft = tab; } else if (tabEnd > scrollRect.right() + d->scrollOffset) { cutRight = i; cutTabRight = tab; } // Don't bother drawing a tab if the entire tab is outside of the visible tab bar. if ((!vertical && (tab.rect.right() < 0 || tab.rect.left() > width())) || (vertical && (tab.rect.bottom() < 0 || tab.rect.top() > height()))) continue; optTabBase.tabBarRect |= tab.rect; if (i == selected) continue; p.drawControl(QStyle::CE_TabBarTab, tab); } // Draw the selected tab last to get it "on top" if (selected >= 0) { QStyleOptionTab tab; initStyleOption(&tab, selected); if (d->paintWithOffsets && d->tabList[selected].dragOffset != 0) { if (vertical) tab.rect.moveTop(tab.rect.y() + d->tabList[selected].dragOffset); else tab.rect.moveLeft(tab.rect.x() + d->tabList[selected].dragOffset); } if (!d->dragInProgress) p.drawControl(QStyle::CE_TabBarTab, tab); else { int taboverlap = style()->pixelMetric(QStyle::PM_TabBarTabOverlap, 0, this); if (verticalTabs(d->shape)) d->movingTab->setGeometry(tab.rect.adjusted(0, -taboverlap, 0, taboverlap)); else d->movingTab->setGeometry(tab.rect.adjusted(-taboverlap, 0, taboverlap, 0)); } } // Only draw the tear indicator if necessary. Most of the time we don't need too. if (d->leftB->isVisible() && cutLeft >= 0) { cutTabLeft.rect = rect(); cutTabLeft.rect = style()->subElementRect(QStyle::SE_TabBarTearIndicatorLeft, &cutTabLeft, this); p.drawPrimitive(QStyle::PE_IndicatorTabTearLeft, cutTabLeft); } if (d->rightB->isVisible() && cutRight >= 0) { cutTabRight.rect = rect(); cutTabRight.rect = style()->subElementRect(QStyle::SE_TabBarTearIndicatorRight, &cutTabRight, this); p.drawPrimitive(QStyle::PE_IndicatorTabTearRight, cutTabRight); } } /* Given that index at position from moved to position to where return where index goes. */ int QTabBarPrivate::calculateNewPosition(int from, int to, int index) const { if (index == from) return to; int start = qMin(from, to); int end = qMax(from, to); if (index >= start && index <= end) index += (from < to) ? -1 : 1; return index; } /*! Moves the item at index position \a from to index position \a to. \since 4.5 \sa tabMoved(), tabLayoutChange() */ void QTabBar::moveTab(int from, int to) { Q_D(QTabBar); if (from == to || !d->validIndex(from) || !d->validIndex(to)) return; bool vertical = verticalTabs(d->shape); int oldPressedPosition = 0; if (d->pressedIndex != -1) { // Record the position of the pressed tab before reordering the tabs. oldPressedPosition = vertical ? d->tabList[d->pressedIndex].rect.y() : d->tabList[d->pressedIndex].rect.x(); } // Update the locations of the tabs first int start = qMin(from, to); int end = qMax(from, to); int width = vertical ? d->tabList[from].rect.height() : d->tabList[from].rect.width(); if (from < to) width *= -1; bool rtl = isRightToLeft(); for (int i = start; i <= end; ++i) { if (i == from) continue; if (vertical) d->tabList[i].rect.moveTop(d->tabList[i].rect.y() + width); else d->tabList[i].rect.moveLeft(d->tabList[i].rect.x() + width); int direction = -1; if (rtl && !vertical) direction *= -1; if (d->tabList[i].dragOffset != 0) d->tabList[i].dragOffset += (direction * width); } if (vertical) { if (from < to) d->tabList[from].rect.moveTop(d->tabList[to].rect.bottom() + 1); else d->tabList[from].rect.moveTop(d->tabList[to].rect.top() - width); } else { if (from < to) d->tabList[from].rect.moveLeft(d->tabList[to].rect.right() + 1); else d->tabList[from].rect.moveLeft(d->tabList[to].rect.left() - width); } // Move the actual data structures d->tabList.move(from, to); // update lastTab locations for (int i = 0; i < d->tabList.count(); ++i) d->tabList[i].lastTab = d->calculateNewPosition(from, to, d->tabList[i].lastTab); // update external variables int previousIndex = d->currentIndex; d->currentIndex = d->calculateNewPosition(from, to, d->currentIndex); // If we are in the middle of a drag update the dragStartPosition if (d->pressedIndex != -1) { d->pressedIndex = d->calculateNewPosition(from, to, d->pressedIndex); int newPressedPosition = vertical ? d->tabList[d->pressedIndex].rect.top() : d->tabList[d->pressedIndex].rect.left(); int diff = oldPressedPosition - newPressedPosition; if (isRightToLeft() && !vertical) diff *= -1; if (vertical) d->dragStartPosition.setY(d->dragStartPosition.y() - diff); else d->dragStartPosition.setX(d->dragStartPosition.x() - diff); } d->layoutWidgets(start); update(); emit tabMoved(from, to); if (previousIndex != d->currentIndex) emit currentChanged(d->currentIndex); emit tabLayoutChange(); } void QTabBarPrivate::slide(int from, int to) { Q_Q(QTabBar); if (from == to || !validIndex(from) || !validIndex(to)) return; bool vertical = verticalTabs(shape); int preLocation = vertical ? q->tabRect(from).y() : q->tabRect(from).x(); q->setUpdatesEnabled(false); q->moveTab(from, to); q->setUpdatesEnabled(true); int postLocation = vertical ? q->tabRect(to).y() : q->tabRect(to).x(); int length = postLocation - preLocation; tabList[to].dragOffset -= length; tabList[to].startAnimation(this, ANIMATION_DURATION); } void QTabBarPrivate::moveTab(int index, int offset) { if (!validIndex(index)) return; tabList[index].dragOffset = offset; layoutTab(index); // Make buttons follow tab q_func()->update(); } /*!\reimp */ void QTabBar::mousePressEvent(QMouseEvent *event) { Q_D(QTabBar); const QPoint pos = event->pos(); const bool isEventInCornerButtons = (!d->leftB->isHidden() && d->leftB->geometry().contains(pos)) || (!d->rightB->isHidden() && d->rightB->geometry().contains(pos)); if (!isEventInCornerButtons) { const int index = d->indexAtPos(pos); emit tabBarClicked(index); } if (event->button() != Qt::LeftButton) { event->ignore(); return; } // Be safe! if (d->pressedIndex != -1 && d->movable) d->moveTabFinished(d->pressedIndex); d->pressedIndex = d->indexAtPos(event->pos()); #if 0 // Used to be included in Qt4 for Q_WS_MAC d->previousPressedIndex = d->pressedIndex; #endif if (d->validIndex(d->pressedIndex)) { QStyleOptionTabBarBase optTabBase; optTabBase.init(this); optTabBase.documentMode = d->documentMode; if (event->type() == style()->styleHint(QStyle::SH_TabBar_SelectMouseType, &optTabBase, this)) setCurrentIndex(d->pressedIndex); else repaint(tabRect(d->pressedIndex)); if (d->movable) { d->dragStartPosition = event->pos(); } } } /*!\reimp */ void QTabBar::mouseMoveEvent(QMouseEvent *event) { Q_D(QTabBar); if (d->movable) { // Be safe! if (d->pressedIndex != -1 && event->buttons() == Qt::NoButton) d->moveTabFinished(d->pressedIndex); // Start drag if (!d->dragInProgress && d->pressedIndex != -1) { if ((event->pos() - d->dragStartPosition).manhattanLength() > QApplication::startDragDistance()) { d->dragInProgress = true; d->setupMovableTab(); } } if (event->buttons() == Qt::LeftButton && d->dragInProgress && d->validIndex(d->pressedIndex)) { bool vertical = verticalTabs(d->shape); int dragDistance; if (vertical) { dragDistance = (event->pos().y() - d->dragStartPosition.y()); } else { dragDistance = (event->pos().x() - d->dragStartPosition.x()); } d->tabList[d->pressedIndex].dragOffset = dragDistance; QRect startingRect = tabRect(d->pressedIndex); if (vertical) startingRect.moveTop(startingRect.y() + dragDistance); else startingRect.moveLeft(startingRect.x() + dragDistance); int overIndex; if (dragDistance < 0) overIndex = tabAt(startingRect.topLeft()); else overIndex = tabAt(startingRect.topRight()); if (overIndex != d->pressedIndex && overIndex != -1) { int offset = 1; if (isRightToLeft() && !vertical) offset *= -1; if (dragDistance < 0) { dragDistance *= -1; offset *= -1; } for (int i = d->pressedIndex; offset > 0 ? i < overIndex : i > overIndex; i += offset) { QRect overIndexRect = tabRect(overIndex); int needsToBeOver = (vertical ? overIndexRect.height() : overIndexRect.width()) / 2; if (dragDistance > needsToBeOver) d->slide(i + offset, d->pressedIndex); } } // Buttons needs to follow the dragged tab d->layoutTab(d->pressedIndex); update(); } #if 0 // Used to be included in Qt4 for Q_WS_MAC } else if (!d->documentMode && event->buttons() == Qt::LeftButton && d->previousPressedIndex != -1) { int newPressedIndex = d->indexAtPos(event->pos()); if (d->pressedIndex == -1 && d->previousPressedIndex == newPressedIndex) { d->pressedIndex = d->previousPressedIndex; update(tabRect(d->pressedIndex)); } else if(d->pressedIndex != newPressedIndex) { d->pressedIndex = -1; update(tabRect(d->previousPressedIndex)); } #endif } if (event->buttons() != Qt::LeftButton) { event->ignore(); return; } } void QTabBarPrivate::setupMovableTab() { Q_Q(QTabBar); if (!movingTab) movingTab = new QMovableTabWidget(q); int taboverlap = q->style()->pixelMetric(QStyle::PM_TabBarTabOverlap, 0 ,q); QRect grabRect = q->tabRect(pressedIndex); if (verticalTabs(shape)) grabRect.adjust(0, -taboverlap, 0, taboverlap); else grabRect.adjust(-taboverlap, 0, taboverlap, 0); QPixmap grabImage(grabRect.size() * q->devicePixelRatioF()); grabImage.setDevicePixelRatio(q->devicePixelRatioF()); grabImage.fill(Qt::transparent); QStylePainter p(&grabImage, q); p.initFrom(q); QStyleOptionTab tab; q->initStyleOption(&tab, pressedIndex); tab.position = QStyleOptionTab::OnlyOneTab; if (verticalTabs(shape)) tab.rect.moveTopLeft(QPoint(0, taboverlap)); else tab.rect.moveTopLeft(QPoint(taboverlap, 0)); p.drawControl(QStyle::CE_TabBarTab, tab); p.end(); movingTab->setPixmap(grabImage); movingTab->setGeometry(grabRect); movingTab->raise(); // Re-arrange widget order to avoid overlaps if (tabList[pressedIndex].leftWidget) tabList[pressedIndex].leftWidget->raise(); if (tabList[pressedIndex].rightWidget) tabList[pressedIndex].rightWidget->raise(); if (leftB) leftB->raise(); if (rightB) rightB->raise(); movingTab->setVisible(true); } void QTabBarPrivate::moveTabFinished(int index) { Q_Q(QTabBar); bool cleanup = (pressedIndex == index) || (pressedIndex == -1) || !validIndex(index); bool allAnimationsFinished = true; #if QT_CONFIG(animation) for(int i = 0; allAnimationsFinished && i < tabList.count(); ++i) { const Tab &t = tabList.at(i); if (t.animation && t.animation->state() == QAbstractAnimation::Running) allAnimationsFinished = false; } #endif // animation if (allAnimationsFinished && cleanup) { if(movingTab) movingTab->setVisible(false); // We might not get a mouse release for (int i = 0; i < tabList.count(); ++i) { tabList[i].dragOffset = 0; } if (pressedIndex != -1 && movable) { pressedIndex = -1; dragInProgress = false; dragStartPosition = QPoint(); } layoutWidgets(); } else { if (!validIndex(index)) return; tabList[index].dragOffset = 0; } q->update(); } /*!\reimp */ void QTabBar::mouseReleaseEvent(QMouseEvent *event) { Q_D(QTabBar); if (event->button() != Qt::LeftButton) { event->ignore(); return; } #if 0 // Used to be included in Qt4 for Q_WS_MAC d->previousPressedIndex = -1; #endif if (d->movable && d->dragInProgress && d->validIndex(d->pressedIndex)) { int length = d->tabList[d->pressedIndex].dragOffset; int width = verticalTabs(d->shape) ? tabRect(d->pressedIndex).height() : tabRect(d->pressedIndex).width(); int duration = qMin(ANIMATION_DURATION, (qAbs(length) * ANIMATION_DURATION) / width); d->tabList[d->pressedIndex].startAnimation(d, duration); d->dragInProgress = false; d->movingTab->setVisible(false); d->dragStartPosition = QPoint(); } int i = d->indexAtPos(event->pos()) == d->pressedIndex ? d->pressedIndex : -1; d->pressedIndex = -1; QStyleOptionTabBarBase optTabBase; optTabBase.initFrom(this); optTabBase.documentMode = d->documentMode; const bool selectOnRelease = (style()->styleHint(QStyle::SH_TabBar_SelectMouseType, &optTabBase, this) == QEvent::MouseButtonRelease); if (selectOnRelease) setCurrentIndex(i); if (!selectOnRelease || !d->validIndex(i) || d->currentIndex == i) repaint(tabRect(i)); } /*!\reimp */ void QTabBar::keyPressEvent(QKeyEvent *event) { Q_D(QTabBar); if (event->key() != Qt::Key_Left && event->key() != Qt::Key_Right) { event->ignore(); return; } int offset = event->key() == (isRightToLeft() ? Qt::Key_Right : Qt::Key_Left) ? -1 : 1; d->setCurrentNextEnabledIndex(offset); } /*!\reimp */ #if QT_CONFIG(wheelevent) void QTabBar::wheelEvent(QWheelEvent *event) { #ifndef Q_OS_MAC Q_D(QTabBar); int offset = event->delta() > 0 ? -1 : 1; d->setCurrentNextEnabledIndex(offset); QWidget::wheelEvent(event); #else Q_UNUSED(event) #endif } #endif // QT_CONFIG(wheelevent) void QTabBarPrivate::setCurrentNextEnabledIndex(int offset) { Q_Q(QTabBar); for (int index = currentIndex + offset; validIndex(index); index += offset) { if (tabList.at(index).enabled) { q->setCurrentIndex(index); break; } } } /*!\reimp */ void QTabBar::changeEvent(QEvent *event) { Q_D(QTabBar); switch (event->type()) { case QEvent::StyleChange: if (!d->elideModeSetByUser) d->elideMode = Qt::TextElideMode(style()->styleHint(QStyle::SH_TabBar_ElideMode, 0, this)); if (!d->useScrollButtonsSetByUser) d->useScrollButtons = !style()->styleHint(QStyle::SH_TabBar_PreferNoArrows, 0, this); Q_FALLTHROUGH(); case QEvent::FontChange: d->textSizes.clear(); d->refresh(); break; default: break; } QWidget::changeEvent(event); } /*! \reimp */ void QTabBar::timerEvent(QTimerEvent *event) { Q_D(QTabBar); if (event->timerId() == d->switchTabTimerId) { killTimer(d->switchTabTimerId); d->switchTabTimerId = 0; setCurrentIndex(d->switchTabCurrentIndex); d->switchTabCurrentIndex = -1; } QWidget::timerEvent(event); } /*! \property QTabBar::elideMode \brief how to elide text in the tab bar \since 4.2 This property controls how items are elided when there is not enough space to show them for a given tab bar size. By default the value is style dependent. \sa QTabWidget::elideMode, usesScrollButtons, QStyle::SH_TabBar_ElideMode */ Qt::TextElideMode QTabBar::elideMode() const { Q_D(const QTabBar); return d->elideMode; } void QTabBar::setElideMode(Qt::TextElideMode mode) { Q_D(QTabBar); d->elideMode = mode; d->elideModeSetByUser = true; d->textSizes.clear(); d->refresh(); } /*! \property QTabBar::usesScrollButtons \brief Whether or not a tab bar should use buttons to scroll tabs when it has many tabs. \since 4.2 When there are too many tabs in a tab bar for its size, the tab bar can either choose to expand its size or to add buttons that allow you to scroll through the tabs. By default the value is style dependant. \sa elideMode, QTabWidget::usesScrollButtons, QStyle::SH_TabBar_PreferNoArrows */ bool QTabBar::usesScrollButtons() const { return d_func()->useScrollButtons; } void QTabBar::setUsesScrollButtons(bool useButtons) { Q_D(QTabBar); d->useScrollButtonsSetByUser = true; if (d->useScrollButtons == useButtons) return; d->useScrollButtons = useButtons; d->refresh(); } /*! \property QTabBar::tabsClosable \brief Whether or not a tab bar should place close buttons on each tab \since 4.5 When tabsClosable is set to true a close button will appear on the tab on either the left or right hand side depending upon the style. When the button is clicked the tab the signal tabCloseRequested will be emitted. By default the value is false. \sa setTabButton(), tabRemoved() */ bool QTabBar::tabsClosable() const { Q_D(const QTabBar); return d->closeButtonOnTabs; } void QTabBar::setTabsClosable(bool closable) { Q_D(QTabBar); if (d->closeButtonOnTabs == closable) return; d->closeButtonOnTabs = closable; ButtonPosition closeSide = (ButtonPosition)style()->styleHint(QStyle::SH_TabBar_CloseButtonPosition, 0, this); if (!closable) { for (int i = 0; i < d->tabList.count(); ++i) { if (closeSide == LeftSide && d->tabList[i].leftWidget) { d->tabList[i].leftWidget->deleteLater(); d->tabList[i].leftWidget = 0; } if (closeSide == RightSide && d->tabList[i].rightWidget) { d->tabList[i].rightWidget->deleteLater(); d->tabList[i].rightWidget = 0; } } } else { bool newButtons = false; for (int i = 0; i < d->tabList.count(); ++i) { if (tabButton(i, closeSide)) continue; newButtons = true; QAbstractButton *closeButton = new CloseButton(this); connect(closeButton, SIGNAL(clicked()), this, SLOT(_q_closeTab())); setTabButton(i, closeSide, closeButton); } if (newButtons) d->layoutTabs(); } update(); } /*! \enum QTabBar::ButtonPosition \since 4.5 This enum type lists the location of the widget on a tab. \value LeftSide Left side of the tab. \value RightSide Right side of the tab. */ /*! \enum QTabBar::SelectionBehavior \since 4.5 This enum type lists the behavior of QTabBar when a tab is removed and the tab being removed is also the current tab. \value SelectLeftTab Select the tab to the left of the one being removed. \value SelectRightTab Select the tab to the right of the one being removed. \value SelectPreviousTab Select the previously selected tab. */ /*! \property QTabBar::selectionBehaviorOnRemove \brief What tab should be set as current when removeTab is called if the removed tab is also the current tab. \since 4.5 By default the value is SelectRightTab. \sa removeTab() */ QTabBar::SelectionBehavior QTabBar::selectionBehaviorOnRemove() const { Q_D(const QTabBar); return d->selectionBehaviorOnRemove; } void QTabBar::setSelectionBehaviorOnRemove(QTabBar::SelectionBehavior behavior) { Q_D(QTabBar); d->selectionBehaviorOnRemove = behavior; } /*! \property QTabBar::expanding \brief When expanding is true QTabBar will expand the tabs to use the empty space. \since 4.5 By default the value is true. \sa QTabWidget::documentMode */ bool QTabBar::expanding() const { Q_D(const QTabBar); return d->expanding; } void QTabBar::setExpanding(bool enabled) { Q_D(QTabBar); if (d->expanding == enabled) return; d->expanding = enabled; d->layoutTabs(); } /*! \property QTabBar::movable \brief This property holds whether the user can move the tabs within the tabbar area. \since 4.5 By default, this property is \c false; */ bool QTabBar::isMovable() const { Q_D(const QTabBar); return d->movable; } void QTabBar::setMovable(bool movable) { Q_D(QTabBar); d->movable = movable; } /*! \property QTabBar::documentMode \brief Whether or not the tab bar is rendered in a mode suitable for the main window. \since 4.5 This property is used as a hint for styles to draw the tabs in a different way then they would normally look in a tab widget. On \macos this will look similar to the tabs in Safari or Sierra's Terminal.app. \sa QTabWidget::documentMode */ bool QTabBar::documentMode() const { return d_func()->documentMode; } void QTabBar::setDocumentMode(bool enabled) { Q_D(QTabBar); d->documentMode = enabled; d->updateMacBorderMetrics(); } /*! \property QTabBar::autoHide \brief If true, the tab bar is automatically hidden when it contains less than 2 tabs. \since 5.4 By default, this property is false. \sa QWidget::visible */ bool QTabBar::autoHide() const { Q_D(const QTabBar); return d->autoHide; } void QTabBar::setAutoHide(bool hide) { Q_D(QTabBar); if (d->autoHide == hide) return; d->autoHide = hide; if (hide) d->autoHideTabs(); else setVisible(true); } /*! \property QTabBar::changeCurrentOnDrag \brief If true, then the current tab is automatically changed when dragging over the tabbar. \since 5.4 \note You should also set acceptDrops property to true to make this feature work. By default, this property is false. */ bool QTabBar::changeCurrentOnDrag() const { Q_D(const QTabBar); return d->changeCurrentOnDrag; } void QTabBar::setChangeCurrentOnDrag(bool change) { Q_D(QTabBar); d->changeCurrentOnDrag = change; if (!change) d->killSwitchTabTimer(); } /*! Sets \a widget on the tab \a index. The widget is placed on the left or right hand side depending upon the \a position. \since 4.5 Any previously set widget in \a position is hidden. The tab bar will take ownership of the widget and so all widgets set here will be deleted by the tab bar when it is destroyed unless you separately reparent the widget after setting some other widget (or 0). \sa tabsClosable() */ void QTabBar::setTabButton(int index, ButtonPosition position, QWidget *widget) { Q_D(QTabBar); if (index < 0 || index >= d->tabList.count()) return; if (widget) { widget->setParent(this); // make sure our left and right widgets stay on top widget->lower(); widget->show(); } if (position == LeftSide) { if (d->tabList[index].leftWidget) d->tabList[index].leftWidget->hide(); d->tabList[index].leftWidget = widget; } else { if (d->tabList[index].rightWidget) d->tabList[index].rightWidget->hide(); d->tabList[index].rightWidget = widget; } d->layoutTabs(); d->refresh(); update(); } /*! Returns the widget set a tab \a index and \a position or 0 if one is not set. */ QWidget *QTabBar::tabButton(int index, ButtonPosition position) const { Q_D(const QTabBar); if (index < 0 || index >= d->tabList.count()) return 0; if (position == LeftSide) return d->tabList.at(index).leftWidget; else return d->tabList.at(index).rightWidget; } #ifndef QT_NO_ACCESSIBILITY /*! Sets the accessibleName of the tab at position \a index to \a name. */ void QTabBar::setAccessibleTabName(int index, const QString &name) { Q_D(QTabBar); if (QTabBarPrivate::Tab *tab = d->at(index)) { tab->accessibleName = name; QAccessibleEvent event(this, QAccessible::NameChanged); event.setChild(index); QAccessible::updateAccessibility(&event); } } /*! Returns the accessibleName of the tab at position \a index, or an empty string if \a index is out of range. */ QString QTabBar::accessibleTabName(int index) const { Q_D(const QTabBar); if (const QTabBarPrivate::Tab *tab = d->at(index)) return tab->accessibleName; return QString(); } #endif // QT_NO_ACCESSIBILITY CloseButton::CloseButton(QWidget *parent) : QAbstractButton(parent) { setFocusPolicy(Qt::NoFocus); #ifndef QT_NO_CURSOR setCursor(Qt::ArrowCursor); #endif #ifndef QT_NO_TOOLTIP setToolTip(tr("Close Tab")); #endif resize(sizeHint()); } QSize CloseButton::sizeHint() const { ensurePolished(); int width = style()->pixelMetric(QStyle::PM_TabCloseIndicatorWidth, 0, this); int height = style()->pixelMetric(QStyle::PM_TabCloseIndicatorHeight, 0, this); return QSize(width, height); } void CloseButton::enterEvent(QEvent *event) { if (isEnabled()) update(); QAbstractButton::enterEvent(event); } void CloseButton::leaveEvent(QEvent *event) { if (isEnabled()) update(); QAbstractButton::leaveEvent(event); } void CloseButton::paintEvent(QPaintEvent *) { QPainter p(this); QStyleOption opt; opt.init(this); opt.state |= QStyle::State_AutoRaise; if (isEnabled() && underMouse() && !isChecked() && !isDown()) opt.state |= QStyle::State_Raised; if (isChecked()) opt.state |= QStyle::State_On; if (isDown()) opt.state |= QStyle::State_Sunken; if (const QTabBar *tb = qobject_cast(parent())) { int index = tb->currentIndex(); QTabBar::ButtonPosition position = (QTabBar::ButtonPosition)style()->styleHint(QStyle::SH_TabBar_CloseButtonPosition, 0, tb); if (tb->tabButton(index, position) == this) opt.state |= QStyle::State_Selected; } style()->drawPrimitive(QStyle::PE_IndicatorTabClose, &opt, &p, this); } #if QT_CONFIG(animation) void QTabBarPrivate::Tab::TabBarAnimation::updateCurrentValue(const QVariant ¤t) { priv->moveTab(priv->tabList.indexOf(*tab), current.toInt()); } void QTabBarPrivate::Tab::TabBarAnimation::updateState(QAbstractAnimation::State newState, QAbstractAnimation::State) { if (newState == Stopped) priv->moveTabFinished(priv->tabList.indexOf(*tab)); } #endif QT_END_NAMESPACE #include "moc_qtabbar.cpp" #include "qtabbar.moc"