/**************************************************************************** ** ** Implementation of QTab and QTabBar classes ** ** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved. ** ** This file is part of the widgets module of the Qt GUI Toolkit. ** ** This file may be used under the terms of the GNU General ** Public License versions 2.0 or 3.0 as published by the Free ** Software Foundation and appearing in the files LICENSE.GPL2 ** and LICENSE.GPL3 included in the packaging of this file. ** Alternatively you may (at your option) use any later version ** of the GNU General Public License if such license has been ** publicly approved by Trolltech ASA (or its successors, if any) ** and the KDE Free Qt Foundation. ** ** Please review the following information to ensure GNU General ** Public Licensing requirements will be met: ** http://trolltech.com/products/qt/licenses/licensing/opensource/. ** If you are unsure which license is appropriate for your use, please ** review the following information: ** http://trolltech.com/products/qt/licenses/licensing/licensingoverview ** or contact the sales department at sales@trolltech.com. ** ** This file may be used under the terms of the Q Public License as ** defined by Trolltech ASA and appearing in the file LICENSE.QPL ** included in the packaging of this file. Licensees holding valid Qt ** Commercial licenses may use this file in accordance with the Qt ** Commercial License Agreement provided with the Software. ** ** This file is provided "AS IS" with NO WARRANTY OF ANY KIND, ** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted ** herein. ** **********************************************************************/ #include "qtabbar.h" #ifndef QT_NO_TABBAR #include "qaccel.h" #include "qbitmap.h" #include "qtoolbutton.h" #include "qtooltip.h" #include "qapplication.h" #include "qstyle.h" #include "qpainter.h" #include "qiconset.h" #include "qcursor.h" #include "../kernel/qinternal_p.h" #if defined(QT_ACCESSIBILITY_SUPPORT) #include "qaccessible.h" #endif #ifdef Q_WS_MACX #include #endif /*! \class QTab qtabbar.h \brief The QTab class provides the structures in a QTabBar. \ingroup advanced This class is used for custom QTabBar tab headings. \sa QTabBar */ /*! Constructs an empty tab. All fields are set to empty. */ QTab::QTab() : enabled( TRUE ), id ( 0 ), iconset( 0 ), tb( 0 ) { } /*! Constructs a tab with the text \a text. */ QTab::QTab( const QString &text ) : label( text ), enabled( TRUE ), id( 0 ), iconset( 0 ), tb( 0 ) { } /*! Constructs a tab with an \a icon and the text, \a text. */ QTab::QTab( const QIconSet& icon, const QString& text ) : label( text ), enabled( TRUE ), id( 0 ), iconset( new QIconSet(icon) ), tb( 0 ) { } /*! \fn QString QTab::text() const Returns the text of the QTab label. */ /*! \fn QIconSet QTab::iconSet() const Return the QIconSet of the QTab. */ /*! \fn void QTab::setRect( const QRect &rect ) Set the QTab QRect to \a rect. */ /*! \fn QRect QTab::rect() const Return the QRect for the QTab. */ /*! \fn void QTab::setEnabled( bool enable ) If \a enable is TRUE enable the QTab, otherwise disable it. */ /*! \fn bool QTab::isEnabled() const Returns TRUE if the QTab is enabled; otherwise returns FALSE. */ /*! \fn void QTab::setIdentifier( int i ) Set the identifier for the QTab to \a i. Each QTab's identifier within a QTabBar must be unique. */ /*! \fn int QTab::identifier() const Return the QTab's identifier. */ /*! Destroys the tab and frees up all allocated resources. */ QTab::~QTab() { delete iconset; tb = 0; } /*! \class QTabBar qtabbar.h \brief The QTabBar class provides a tab bar, e.g. for use in tabbed dialogs. \ingroup advanced QTabBar is straightforward to use; it draws the tabs using one of the predefined \link QTabBar::Shape shapes\endlink, 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} and a \l{QTabDialog}. The choice of tab shape is a matter of taste, although tab dialogs (for preferences and similar) invariably use \c RoundedAbove; nobody uses \c TriangularAbove. Tab controls in windows other than dialogs almost always use either \c RoundedBelow or \c TriangularBelow. Many spreadsheets and other tab controls in which all the pages are essentially similar use \c TriangularBelow, whereas \c RoundedBelow is used mostly when the pages are different (e.g. a multi-page tool palette). The most important part of QTabBar's API is the selected() signal. This is emitted whenever the selected page changes (even at startup, when the selected page changes from 'none'). There is also a slot, setCurrentTab(), which can be used to select a page programmatically. QTabBar creates automatic accelerator keys in the manner of QButton; e.g. if a tab's label is "\&Graphics", Alt+G becomes an accelerator key for switching to that tab. The following virtual functions may need to be reimplemented: \list \i paint() paints a single tab. paintEvent() calls paint() for each tab so that any overlap will look right. \i addTab() creates a new tab and adds it to the bar. \i selectTab() decides which tab, if any, the user selects with the mouse. \endlist The index of the current tab is returned by currentTab(). The tab with a particular index is returned by tabAt(), the tab with a particular id is returned by tab(). The index of a tab is returned by indexOf(). The current tab can be set by index or tab pointer using one of the setCurrentTab() functions. */ /*! \enum QTabBar::Shape This enum type lists the built-in shapes supported by QTabBar: \value RoundedAbove the normal rounded look above the pages \value RoundedBelow the normal rounded look below the pages \value TriangularAbove triangular tabs above the pages (very unusual; included for completeness) \value TriangularBelow triangular tabs similar to those used in the Excel spreadsheet, for example */ class QTabBarToolTip; struct QTabPrivate { int id; int focus; #ifndef QT_NO_ACCEL QAccel * a; #endif QTab *pressed; QTabBar::Shape s; QToolButton* rightB; QToolButton* leftB; int btnWidth; bool scrolls; QTabBarToolTip * toolTips; }; #ifndef QT_NO_TOOLTIP /* \internal */ class QTabBarToolTip : public QToolTip { public: QTabBarToolTip( QWidget * parent ) : QToolTip( parent ) {} virtual ~QTabBarToolTip() {} void add( QTab * tab, const QString & tip ) { tabTips.replace( tab, tip ); } void remove( QTab * tab ) { tabTips.erase( tab ); } QString tipForTab( QTab * tab ) const { QMapConstIterator it; it = tabTips.find( tab ); if ( it != tabTips.end() ) return it.data(); else return QString(); } protected: void maybeTip( const QPoint & p ) { QTabBar * tb = (QTabBar *) parentWidget(); if ( !tb ) return; // check if the scroll buttons in the tab bar are visible - // don't display any tips if the pointer is over one of them QRect rectL, rectR; rectL.setRect( tb->d->leftB->x(), tb->d->leftB->y(), tb->d->leftB->width(), tb->d->leftB->height() ); rectR.setRect( tb->d->rightB->x(), tb->d->rightB->y(), tb->d->rightB->width(), tb->d->rightB->height() ); if ( tb->d->scrolls && (rectL.contains( p ) || rectR.contains( p )) ) return; #ifndef QT_NO_TOOLTIP // find and show the tool tip for the tab under the point p QMapIterator it; for ( it = tabTips.begin(); it != tabTips.end(); ++it ) { if ( it.key()->rect().contains( p ) ) tip( it.key()->rect(), it.data() ); } #endif } private: QMap tabTips; }; #endif /*! \fn void QTabBar::selected( int id ) QTabBar emits this signal whenever any tab is selected, whether by the program or by the user. The argument \a id is the id of the tab as returned by addTab(). show() is guaranteed to emit this signal; you can display your page in a slot connected to this signal. */ /*! \fn void QTabBar::layoutChanged() QTabBar emits the signal whenever the layout of the tab bar has been recalculated, for example when the contents of a tab change. */ /*! Constructs a new, empty tab bar; the \a parent and \a name arguments are passed on to the QWidget constructor. */ QTabBar::QTabBar( QWidget * parent, const char *name ) : QWidget( parent, name, WNoAutoErase | WNoMousePropagation ), l(NULL), hoverTab( 0 ) { d = new QTabPrivate; d->pressed = 0; d->id = 0; d->focus = 0; d->toolTips = 0; #ifndef QT_NO_ACCEL d->a = new QAccel( this, "tab accelerators" ); connect( d->a, SIGNAL(activated(int)), this, SLOT(setCurrentTab(int)) ); connect( d->a, SIGNAL(activatedAmbiguously(int)), this, SLOT(setCurrentTab(int)) ); #endif d->s = RoundedAbove; d->scrolls = FALSE; d->leftB = new QToolButton( LeftArrow, this, "qt_left_btn" ); connect( d->leftB, SIGNAL( clicked() ), this, SLOT( scrollTabs() ) ); d->leftB->hide(); d->rightB = new QToolButton( RightArrow, this, "qt_right_btn" ); connect( d->rightB, SIGNAL( clicked() ), this, SLOT( scrollTabs() ) ); d->rightB->hide(); d->btnWidth = style().pixelMetric(QStyle::PM_TabBarScrollButtonWidth, this); l = new QPtrList; lstatic = new QPtrList; lstatic->setAutoDelete( TRUE ); setFocusPolicy( TabFocus ); setSizePolicy( QSizePolicy( QSizePolicy::Preferred, QSizePolicy::Fixed ) ); } /*! Destroys the tab control, freeing memory used. */ QTabBar::~QTabBar() { #ifndef QT_NO_TOOLTIP if ( d->toolTips ) delete d->toolTips; #endif delete d; d = 0; delete l; l = 0; delete lstatic; lstatic = 0; } /*! Adds the tab, \a newTab, to the tab control. Sets \a newTab's id to a new id and places the tab just to the right of the existing tabs. If the tab's label contains an ampersand, the letter following the ampersand is used as an accelerator for the tab, e.g. if the label is "Bro\&wse" then Alt+W becomes an accelerator which will move the focus to this tab. Returns the id. \sa insertTab() */ int QTabBar::addTab( QTab * newTab ) { return insertTab( newTab ); } /*! Inserts the tab, \a newTab, into the tab control. If \a index is not specified, the tab is simply appended. Otherwise it's inserted at the specified position. Sets \a newTab's id to a new id. If the tab's label contains an ampersand, the letter following the ampersand is used as an accelerator for the tab, e.g. if the label is "Bro\&wse" then Alt+W becomes an accelerator which will move the focus to this tab. Returns the id. \sa addTab() */ int QTabBar::insertTab( QTab * newTab, int index ) { newTab->id = d->id++; if ( !tab( d->focus ) ) d->focus = newTab->id; newTab->setTabBar( this ); l->insert( 0, newTab ); if ( index < 0 || index > int(lstatic->count()) ) lstatic->append( newTab ); else lstatic->insert( index, newTab ); layoutTabs(); updateArrowButtons(); makeVisible( tab( currentTab() ) ); #ifndef QT_NO_ACCEL int p = QAccel::shortcutKey( newTab->label ); if ( p ) d->a->insertItem( p, newTab->id ); #endif return newTab->id; } /*! Removes tab \a t from the tab control, and deletes the tab. */ void QTabBar::removeTab( QTab * t ) { //#### accelerator labels?? #ifndef QT_NO_TOOLTIP if ( d->toolTips ) d->toolTips->remove( t ); #endif #ifndef QT_NO_ACCEL if ( d->a ) d->a->removeItem( t->id ); #endif bool updateFocus = t->id == d->focus; // remove the TabBar Reference if(d->pressed == t) d->pressed = 0; t->setTabBar( 0 ); l->remove( t ); lstatic->remove( t ); layoutTabs(); updateArrowButtons(); makeVisible( tab( currentTab() ) ); if ( updateFocus ) d->focus = currentTab(); update(); } /*! Enables tab \a id if \a enabled is TRUE or disables it if \a enabled is FALSE. If \a id is currently selected, setTabEnabled(FALSE) makes another tab selected. setTabEnabled() updates the display if this causes a change in \a id's status. \sa update(), isTabEnabled() */ void QTabBar::setTabEnabled( int id, bool enabled ) { QTab * t; for( t = l->first(); t; t = l->next() ) { if ( t && t->id == id ) { if ( t->enabled != enabled ) { t->enabled = enabled; #ifndef QT_NO_ACCEL d->a->setItemEnabled( t->id, enabled ); #endif QRect r( t->r ); if ( !enabled && id == currentTab() ) { QPoint p1( t->r.center() ), p2; int m = 2147483647; int distance; // look for the closest enabled tab - measure the // distance between the centers of the two tabs for( QTab * n = l->first(); n; n = l->next() ) { if ( n->enabled ) { p2 = n->r.center(); distance = (p2.x() - p1.x())*(p2.x() - p1.x()) + (p2.y() - p1.y())*(p2.y() - p1.y()); if ( distance < m ) { t = n; m = distance; } } } if ( t->enabled ) { r = r.unite( t->r ); l->append( l->take( l->findRef( t ) ) ); emit selected( t->id ); } } repaint( r, FALSE ); } return; } } } /*! Returns TRUE if the tab with id \a id exists and is enabled; otherwise returns FALSE. \sa setTabEnabled() */ bool QTabBar::isTabEnabled( int id ) const { QTab * t = tab( id ); if ( t ) return t->enabled; return FALSE; } /*! \reimp */ QSize QTabBar::sizeHint() const { QSize sz(0, 0); if ( QTab * t = l->first() ) { QRect r( t->r ); while ( (t = l->next()) != 0 ) r = r.unite( t->r ); sz = r.size(); } return sz.expandedTo(QApplication::globalStrut()); } /*! \reimp */ QSize QTabBar::minimumSizeHint() const { if(style().styleHint( QStyle::SH_TabBar_PreferNoArrows, this )) return sizeHint(); return QSize( d->rightB->sizeHint().width() * 2 + 75, sizeHint().height() ); } /*! Paints the tab \a t using painter \a p. If and only if \a selected is TRUE, \a t is drawn currently selected. This virtual function may be reimplemented to change the look of QTabBar. If you decide to reimplement it, you may also need to reimplement sizeHint(). */ void QTabBar::paint( QPainter * p, QTab * t, bool selected ) const { QStyle::SFlags flags = QStyle::Style_Default; if (isEnabled() && t->isEnabled()) { flags |= QStyle::Style_Enabled; } if (topLevelWidget() == qApp->activeWindow()) { flags |= QStyle::Style_Active; } if ( selected ) { flags |= QStyle::Style_Selected; } else if (t == d->pressed) { flags |= QStyle::Style_Sunken; } //selection flags if (t->rect().contains(mapFromGlobal(QCursor::pos()))) { flags |= QStyle::Style_MouseOver; } style().drawControl( QStyle::CE_TabBarTab, p, this, t->rect(), colorGroup(), flags, QStyleOption(t, hoverTab) ); QRect r( t->r ); p->setFont( font() ); int iw = 0; int ih = 0; if ( t->iconset != 0 ) { iw = t->iconset->pixmap( QIconSet::Small, QIconSet::Normal ).width() + 4; ih = t->iconset->pixmap( QIconSet::Small, QIconSet::Normal ).height(); } QFontMetrics fm = p->fontMetrics(); int fw = fm.width( t->label ); fw -= t->label.contains('&') * fm.width('&'); fw += t->label.contains("&&") * fm.width('&'); int w = iw + fw + 4; int h = QMAX(fm.height() + 4, ih ); int offset = 3; #ifdef Q_WS_MAC if (::qt_cast(&style())) { offset = 0; } #endif paintLabel( p, QRect( r.left() + (r.width()-w)/2 - offset, r.top() + (r.height()-h)/2, w, h ), t, t->id == keyboardFocusTab() ); } /*! Paints the label of tab \a t centered in rectangle \a br using painter \a p. A focus indication is drawn if \a has_focus is TRUE. */ void QTabBar::paintLabel( QPainter* p, const QRect& br, QTab* t, bool has_focus ) const { QRect r = br; bool selected = currentTab() == t->id; if ( t->iconset) { // the tab has an iconset, draw it in the right mode QIconSet::Mode mode = (t->enabled && isEnabled()) ? QIconSet::Normal : QIconSet::Disabled; if ( mode == QIconSet::Normal && has_focus ) mode = QIconSet::Active; QPixmap pixmap = t->iconset->pixmap( QIconSet::Small, mode ); int pixw = pixmap.width(); int pixh = pixmap.height(); r.setLeft( r.left() + pixw + 4 ); r.setRight( r.right() + 2 ); int xoff = 0, yoff = 0; if(!selected) { xoff = style().pixelMetric(QStyle::PM_TabBarTabShiftHorizontal, this); yoff = style().pixelMetric(QStyle::PM_TabBarTabShiftVertical, this); } p->drawPixmap( br.left() + 2 + xoff, br.center().y()-pixh/2 + yoff, pixmap ); } QStyle::SFlags flags = QStyle::Style_Default; if (isEnabled() && t->isEnabled()) { flags |= QStyle::Style_Enabled; } if (has_focus) { flags |= QStyle::Style_HasFocus; } if ( selected ) { flags |= QStyle::Style_Selected; } else if(t == d->pressed) { flags |= QStyle::Style_Sunken; } if(t->rect().contains(mapFromGlobal(QCursor::pos()))) { flags |= QStyle::Style_MouseOver; } style().drawControl( QStyle::CE_TabBarLabel, p, this, r, t->isEnabled() ? colorGroup(): palette().disabled(), flags, QStyleOption(t, hoverTab) ); } /*! Repaints the tab row. All the painting is done by paint(); paintEvent() only decides which tabs need painting and in what order. The event is passed in \a e. \sa paint() */ void QTabBar::paintEvent( QPaintEvent * e ) { if ( e->rect().isNull() ) return; QSharedDoubleBuffer buffer( this, e->rect() ); QTab * t; t = l->first(); do { QTab * n = l->next(); if ( t && t->r.intersects( e->rect() ) ) { paint( buffer.painter(), t, n == 0 ); } t = n; } while ( t != 0 ); if ( d->scrolls && lstatic->first()->r.left() < 0 ) { QPointArray a; int h = height(); if ( d->s == RoundedAbove ) { buffer.painter()->fillRect( 0, 3, 4, h-5, colorGroup().brush( QColorGroup::Background ) ); a.setPoints( 5, 0,2, 3,h/4, 0,h/2, 3,3*h/4, 0,h ); } else if ( d->s == RoundedBelow ) { buffer.painter()->fillRect( 0, 2, 4, h-5, colorGroup().brush( QColorGroup::Background ) ); a.setPoints( 5, 0,0, 3,h/4, 0,h/2, 3,3*h/4, 0,h-3 ); } if ( !a.isEmpty() ) { buffer.painter()->setPen( colorGroup().light() ); buffer.painter()->drawPolyline( a ); a.translate( 1, 0 ); buffer.painter()->setPen( colorGroup().midlight() ); buffer.painter()->drawPolyline( a ); } } } /*! This virtual function is called by the mouse event handlers to determine which tab is pressed. The default implementation returns a pointer to the tab whose bounding rectangle contains \a p, if exactly one tab's bounding rectangle contains \a p. Otherwise it returns 0. \sa mousePressEvent() mouseReleaseEvent() */ QTab * QTabBar::selectTab( const QPoint & p ) const { QTab * selected = 0; bool moreThanOne = FALSE; QPtrListIterator i( *l ); while( i.current() ) { QTab * t = i.current(); ++i; if ( t && t->r.contains( p ) ) { if ( selected ) moreThanOne = TRUE; else selected = t; } } return moreThanOne ? 0 : selected; } /*! \reimp */ void QTabBar::mousePressEvent( QMouseEvent * e ) { if ( e->button() != LeftButton ) { e->ignore(); return; } QTab *t = selectTab( e->pos() ); if ( t && t->enabled ) { d->pressed = t; if(e->type() == style().styleHint( QStyle::SH_TabBar_SelectMouseType, this )) setCurrentTab( t ); else repaint(t->rect(), FALSE); } } /*! \reimp */ void QTabBar::mouseMoveEvent ( QMouseEvent *e ) { QTab *t = selectTab( e->pos() ); // Repaint hover indicator(s) // Also, avoid unnecessary repaints which otherwise would occour on every MouseMove event causing high cpu load bool forceRepaint = true; if (hoverTab == t) { forceRepaint = false; } hoverTab = t; if (forceRepaint) { repaint(false); } if ( e->state() != LeftButton ) { e->ignore(); return; } if(style().styleHint( QStyle::SH_TabBar_SelectMouseType, this ) == QEvent::MouseButtonRelease) { if(t != d->pressed) { if (d->pressed) { if (!forceRepaint) { repaint(d->pressed->rect(), FALSE); } } if ((d->pressed = t)) { if (!forceRepaint) { repaint(t->rect(), FALSE); } } } } } /*! \reimp */ void QTabBar::mouseReleaseEvent( QMouseEvent *e ) { if (e->button() != LeftButton) { e->ignore(); } if (d->pressed) { QTab *t = selectTab( e->pos() ) == d->pressed ? d->pressed : 0; d->pressed = 0; if(t && t->enabled && e->type() == style().styleHint( QStyle::SH_TabBar_SelectMouseType, this )) { setCurrentTab( t ); } } } void QTabBar::enterEvent( QEvent * ) { hoverTab = 0; } void QTabBar::leaveEvent( QEvent * ) { hoverTab = 0; } /*! \reimp */ void QTabBar::show() { // ensures that one tab is selected. QTab * t = l->last(); QWidget::show(); if ( t ) emit selected( t->id ); } /*! \property QTabBar::currentTab \brief the id of the tab bar's visible tab If no tab page is currently visible, the property's value is -1. Even if the property's value is not -1, you cannot assume that the user can see the relevant page, or that the tab is enabled. When you need to display something the value of this property represents the best page to display. When this property is set to \e id, it will raise the tab with the id \e id and emit the selected() signal. \sa selected() isTabEnabled() */ int QTabBar::currentTab() const { const QTab * t = 0; if (l) { t = l->getLast(); } return t ? t->id : -1; } void QTabBar::setCurrentTab( int id ) { setCurrentTab( tab( id ) ); } /*! \overload Raises \a tab and emits the selected() signal unless the tab was already current. \sa currentTab() selected() */ void QTabBar::setCurrentTab( QTab * tab ) { if ( tab && l ) { if ( l->last() == tab ) return; QRect r = l->last()->r; if ( l->findRef( tab ) >= 0 ) l->append( l->take() ); d->focus = tab->id; setMicroFocusHint( tab->rect().x(), tab->rect().y(), tab->rect().width(), tab->rect().height(), FALSE ); if ( tab->r.intersects( r ) ) { repaint( r.unite( tab->r ), FALSE ); } else { #ifdef Q_WS_MACX update(); #else repaint( r, FALSE ); repaint( tab->r, FALSE ); #endif } makeVisible( tab ); emit selected( tab->id ); #ifdef QT_ACCESSIBILITY_SUPPORT QAccessible::updateAccessibility( this, indexOf(tab->id)+1, QAccessible::Focus ); #endif } } /*! \property QTabBar::keyboardFocusTab \brief the id of the tab that has the keyboard focus This property contains the id of the tab that has the keyboard focus or -1 if the tab bar does not have the keyboard focus. */ int QTabBar::keyboardFocusTab() const { return hasFocus() ? d->focus : -1; } /*! \reimp */ void QTabBar::keyPressEvent( QKeyEvent * e ) { // The right and left arrow keys move a selector, the spacebar // makes the tab with the selector active. All other keys are // ignored. int old = d->focus; bool reverse = QApplication::reverseLayout(); if ( ( !reverse && e->key() == Key_Left ) || ( reverse && e->key() == Key_Right ) ) { // left - skip past any disabled ones if ( d->focus >= 0 ) { QTab * t = lstatic->last(); while ( t && t->id != d->focus ) t = lstatic->prev(); do { t = lstatic->prev(); } while ( t && !t->enabled); if (t) d->focus = t->id; } if ( d->focus < 0 ) d->focus = old; } else if ( ( !reverse && e->key() == Key_Right ) || ( reverse && e->key() == Key_Left ) ) { QTab * t = lstatic->first(); while ( t && t->id != d->focus ) t = lstatic->next(); do { t = lstatic->next(); } while ( t && !t->enabled); if (t) d->focus = t->id; if ( d->focus >= d->id ) d->focus = old; } else { // other keys - ignore e->ignore(); return; } // if the focus moved, repaint and signal if ( old != d->focus ) { setCurrentTab( d->focus ); } } /*! Returns the tab with id \a id or 0 if there is no such tab. \sa count() */ QTab * QTabBar::tab( int id ) const { if (l) { QTab * t; for( t = l->first(); t; t = l->next() ) if ( t && t->id == id ) return t; } return 0; } /*! Returns the tab at position \a index. \sa indexOf() */ QTab * QTabBar::tabAt( int index ) const { QTab * t; QPtrList internalList = *lstatic; t = internalList.at( index ); return t; } /*! Returns the position index of the tab with id \a id or -1 if no tab has this \a id. \sa tabAt() */ int QTabBar::indexOf( int id ) const { QTab * t; QPtrList internalList = *lstatic; int idx = 0; for( t = internalList.first(); t; t = internalList.next() ) { if ( t && t->id == id ) return idx; idx++; } return -1; } /*! \property QTabBar::count \brief the number of tabs in the tab bar \sa tab() */ int QTabBar::count() const { if (l) { return l->count(); } return 0; } /*! The list of QTab objects in the tab bar. This list is unlikely to be in the order that the QTab elements appear visually. One way of iterating over the tabs is like this: \code for ( uint i = 0; i < myTabBar->count(); ++i ) { nextTab = myTabBar->tabAt( i ); // do something with nextTab } \endcode */ QPtrList * QTabBar::tabList() { return l; } /*! \property QTabBar::shape \brief the shape of the tabs in the tab bar The value of this property is one of the following: \c RoundedAbove (default), \c RoundedBelow, \c TriangularAbove or \c TriangularBelow. \sa Shape */ QTabBar::Shape QTabBar::shape() const { return d ? d->s : RoundedAbove; } void QTabBar::setShape( Shape s ) { if ( !d || d->s == s ) return; //######### must recalculate heights d->s = s; update(); } /*! Lays out all existing tabs according to their label and their iconset. */ void QTabBar::layoutTabs() { if ( lstatic->isEmpty() ) return; QSize oldSh(0, 0); if ( QTab * t = l->first() ) { QRect r( t->r ); while ( (t = l->next()) != 0 ) r = r.unite( t->r ); oldSh = r.size(); } d->btnWidth = style().pixelMetric(QStyle::PM_TabBarScrollButtonWidth, this); int hframe, vframe, overlap; hframe = style().pixelMetric( QStyle::PM_TabBarTabHSpace, this ); vframe = style().pixelMetric( QStyle::PM_TabBarTabVSpace, this ); overlap = style().pixelMetric( QStyle::PM_TabBarTabOverlap, this ); QFontMetrics fm = fontMetrics(); QRect r; QTab *t; bool reverse = QApplication::reverseLayout(); if ( reverse ) t = lstatic->last(); else t = lstatic->first(); int x = 0; int offset = (t && d->scrolls) ? t->r.x() : 0; while ( t ) { int lw = fm.width( t->label ); lw -= t->label.contains('&') * fm.width('&'); lw += t->label.contains("&&") * fm.width('&'); int iw = 0; int ih = 0; if ( t->iconset != 0 ) { iw = t->iconset->pixmap( QIconSet::Small, QIconSet::Normal ).width() + 4; ih = t->iconset->pixmap( QIconSet::Small, QIconSet::Normal ).height(); } int h = QMAX( fm.height(), ih ); h = QMAX( h, QApplication::globalStrut().height() ); h += vframe; t->r = QRect(QPoint(x, 0), style().sizeFromContents(QStyle::CT_TabBarTab, this, QSize( QMAX( lw + hframe + iw, QApplication::globalStrut().width() ), h ), QStyleOption(t, hoverTab) )); x += t->r.width() - overlap; r = r.unite( t->r ); if ( reverse ) t = lstatic->prev(); else t = lstatic->next(); } x += overlap; int w = (d->scrolls) ? d->leftB->x() : width(); if (x + offset < w) offset = w - x; if (offset > 0) offset = 0; for ( t = lstatic->first(); t; t = lstatic->next() ) { t->r.moveBy( offset, 0 ); t->r.setHeight( r.height() ); } if ( sizeHint() != oldSh ) updateGeometry(); emit layoutChanged(); } /*! \reimp */ bool QTabBar::event( QEvent *e ) { if ( e->type() == QEvent::LanguageChange ) { layoutTabs(); updateArrowButtons(); makeVisible( tab( currentTab() )); } return QWidget::event( e ); } /*! \reimp */ void QTabBar::styleChange( QStyle& old ) { layoutTabs(); updateArrowButtons(); QWidget::styleChange( old ); } /*! \reimp */ void QTabBar::focusInEvent( QFocusEvent * ) { QTab *t = tab( d->focus ); if ( t ) repaint( t->r, FALSE ); } /*! \reimp */ void QTabBar::focusOutEvent( QFocusEvent * ) { QTab *t = tab( d->focus ); if ( t ) repaint( t->r, FALSE ); } /*! \reimp */ void QTabBar::resizeEvent( QResizeEvent * ) { const int arrowWidth = QMAX( d->btnWidth, QApplication::globalStrut().width() );; d->rightB->setGeometry( width() - arrowWidth, 0, arrowWidth, height() ); d->leftB->setGeometry( width() - 2*arrowWidth, 0, arrowWidth, height() ); layoutTabs(); updateArrowButtons(); makeVisible( tab( currentTab() )); } void QTabBar::scrollTabs() { QTab* left = 0; QTab* right = 0; for ( QTab* t = lstatic->first(); t; t = lstatic->next() ) { if ( t->r.left() < 0 && t->r.right() > 0 ) left = t; if ( t->r.left() < d->leftB->x()+2 ) right = t; } if ( sender() == d->leftB ) makeVisible( left ); else if ( sender() == d->rightB ) makeVisible( right ); } void QTabBar::makeVisible( QTab* tab ) { bool tooFarLeft = ( tab && tab->r.left() < 0 ); bool tooFarRight = ( tab && tab->r.right() >= d->leftB->x() ); if ( !d->scrolls || ( !tooFarLeft && ! tooFarRight ) ) return; bool bs = signalsBlocked(); blockSignals(TRUE); layoutTabs(); blockSignals(bs); int offset = 0; if ( tooFarLeft ) { offset = tab->r.left(); if (tab != lstatic->first()) offset -= 8; } else if ( tooFarRight ) { offset = tab->r.right() - d->leftB->x() + 1; } for ( QTab* t = lstatic->first(); t; t = lstatic->next() ) t->r.moveBy( -offset, 0 ); d->leftB->setEnabled( lstatic->first()->r.left() < 0); d->rightB->setEnabled( lstatic->last()->r.right() >= d->leftB->x() ); // Make sure disabled buttons pop up again if ( !d->leftB->isEnabled() && d->leftB->isDown() ) d->leftB->setDown( FALSE ); if ( !d->rightB->isEnabled() && d->rightB->isDown() ) d->rightB->setDown( FALSE ); update(); emit layoutChanged(); } void QTabBar::updateArrowButtons() { if (lstatic->isEmpty()) { d->scrolls = FALSE; } else { d->scrolls = (lstatic->last()->r.right() - lstatic->first()->r.left() > width()); } if ( d->scrolls ) { const int arrowWidth = QMAX( d->btnWidth, QApplication::globalStrut().width() ); if ( QApplication::reverseLayout() ) { d->rightB->setGeometry( arrowWidth, 0, arrowWidth, height() ); d->leftB->setGeometry( 0, 0, arrowWidth, height() ); } else { d->rightB->setGeometry( width() - arrowWidth, 0, arrowWidth, height() ); d->leftB->setGeometry( width() - 2*arrowWidth, 0, arrowWidth, height() ); } d->leftB->setEnabled( lstatic->first()->r.left() < 0); d->rightB->setEnabled( lstatic->last()->r.right() >= d->leftB->x() ); d->leftB->show(); d->rightB->show(); } else { d->leftB->hide(); d->rightB->hide(); layoutTabs(); } } /*! Removes the tool tip for the tab at index position \a index. */ void QTabBar::removeToolTip( int index ) { #ifndef QT_NO_TOOLTIP QTab * tab = tabAt( index ); if ( !tab || !d->toolTips ) return; d->toolTips->remove( tab ); #endif } /*! Sets the tool tip for the tab at index position \a index to \a tip. */ void QTabBar::setToolTip( int index, const QString & tip ) { #ifndef QT_NO_TOOLTIP QTab * tab = tabAt( index ); if ( !tab ) return; if ( d->toolTips == 0 ) d->toolTips = new QTabBarToolTip( this ); d->toolTips->add( tab, tip ); #endif } /*! Returns the tool tip for the tab at index position \a index. */ QString QTabBar::toolTip( int index ) const { #ifndef QT_NO_TOOLTIP if ( d->toolTips ) return d->toolTips->tipForTab( tabAt( index ) ); else #endif return QString(); } /*! Sets the text of the tab to \a text. */ void QTab::setText( const QString& text ) { label = text; if ( tb ) { #ifndef QT_NO_ACCEL tb->d->a->removeItem( id ); int p = QAccel::shortcutKey( text ); if ( p ) tb->d->a->insertItem( p, id ); #endif tb->layoutTabs(); tb->repaint(FALSE); #if defined(QT_ACCESSIBILITY_SUPPORT) QAccessible::updateAccessibility( tb, tb->indexOf(id)+1, QAccessible::NameChanged ); #endif } } /*! Sets the tab's iconset to \a icon */ void QTab::setIconSet( const QIconSet &icon ) { iconset = new QIconSet( icon ); } // this allows us to handle accelerators that are in a QTabBar. void QTab::setTabBar( QTabBar *newTb ) { tb = newTb; } /*! \internal */ void QTabBar::fontChange( const QFont & oldFont ) { layoutTabs(); QWidget::fontChange( oldFont ); } /*! Returns the tab currently under the mouse pointer, or NULL if no tab is under the cursor */ QTab *QTabBar::mouseHoverTab() const { return hoverTab; } #endif