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The licenses are as published by the Free Software 30 ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 31 ** included in the packaging of this file. Please review the following 32 ** information to ensure the GNU General Public License requirements will 33 ** be met: https://www.gnu.org/licenses/gpl-2.0.html and 34 ** https://www.gnu.org/licenses/gpl-3.0.html. 35 ** 36 ** $QT_END_LICENSE$ 37 ** 38 ****************************************************************************/ 39 40 #ifndef QABSTRACTSCROLLAREA_P_H 41 #define QABSTRACTSCROLLAREA_P_H 42 43 // 44 // W A R N I N G 45 // ------------- 46 // 47 // This file is not part of the Qt API. It exists purely as an 48 // implementation detail. This header file may change from version to 49 // version without notice, or even be removed. 50 // 51 // We mean it. 52 // 53 54 #include <QtWidgets/private/qtwidgetsglobal_p.h> 55 #include "private/qframe_p.h" 56 #include "qabstractscrollarea.h" 57 58 QT_BEGIN_NAMESPACE 59 60 #if QT_CONFIG(scrollarea) 61 62 class QScrollBar; 63 class QAbstractScrollAreaScrollBarContainer; 64 65 // ### Qt 6: is the export still needed? If not, unexport QFramePrivate, too. 66 class Q_WIDGETS_EXPORT QAbstractScrollAreaPrivate: public QFramePrivate 67 { 68 Q_DECLARE_PUBLIC(QAbstractScrollArea) 69 70 public: 71 QAbstractScrollAreaPrivate(); 72 ~QAbstractScrollAreaPrivate(); 73 74 void replaceScrollBar(QScrollBar *scrollBar, Qt::Orientation orientation); 75 76 QAbstractScrollAreaScrollBarContainer *scrollBarContainers[Qt::Vertical + 1]; 77 QScrollBar *hbar, *vbar; 78 Qt::ScrollBarPolicy vbarpolicy, hbarpolicy; 79 80 bool shownOnce; 81 bool inResize; 82 mutable QSize sizeHint; 83 QAbstractScrollArea::SizeAdjustPolicy sizeAdjustPolicy; 84 85 QWidget *viewport; 86 QWidget *cornerWidget; 87 QRect cornerPaintingRect; 88 89 int left, top, right, bottom; // viewport margin 90 91 int xoffset, yoffset; 92 QPoint overshoot; 93 94 void init(); 95 void layoutChildren(); 96 void layoutChildren_helper(bool *needHorizontalScrollbar, bool *needVerticalScrollbar); 97 // ### Fix for 4.4, talk to Bjoern E or Girish. scrollBarPolicyChanged(Qt::Orientation,Qt::ScrollBarPolicy)98 virtual void scrollBarPolicyChanged(Qt::Orientation, Qt::ScrollBarPolicy) {} 99 bool canStartScrollingAt( const QPoint &startPos ); 100 101 void flashScrollBars(); 102 void setScrollBarTransient(QScrollBar *scrollBar, bool transient); 103 104 void _q_hslide(int); 105 void _q_vslide(int); 106 void _q_showOrHideScrollBars(); 107 108 virtual QPoint contentsOffset() const; 109 viewportEvent(QEvent * event)110 inline bool viewportEvent(QEvent *event) 111 { return q_func()->viewportEvent(event); } 112 QScopedPointer<QObject> viewportFilter; 113 }; 114 115 class QAbstractScrollAreaFilter : public QObject 116 { 117 Q_OBJECT 118 public: QAbstractScrollAreaFilter(QAbstractScrollAreaPrivate * p)119 QAbstractScrollAreaFilter(QAbstractScrollAreaPrivate *p) : d(p) 120 { setObjectName(QLatin1String("qt_abstractscrollarea_filter")); } eventFilter(QObject * o,QEvent * e)121 bool eventFilter(QObject *o, QEvent *e) override 122 { return (o == d->viewport ? d->viewportEvent(e) : false); } 123 private: 124 QAbstractScrollAreaPrivate *d; 125 }; 126 127 class QBoxLayout; 128 class QAbstractScrollAreaScrollBarContainer : public QWidget 129 { 130 public: 131 enum LogicalPosition { LogicalLeft = 1, LogicalRight = 2 }; 132 133 QAbstractScrollAreaScrollBarContainer(Qt::Orientation orientation, QWidget *parent); 134 void addWidget(QWidget *widget, LogicalPosition position); 135 QWidgetList widgets(LogicalPosition position); 136 void removeWidget(QWidget *widget); 137 138 QScrollBar *scrollBar; 139 QBoxLayout *layout; 140 private: 141 int scrollBarLayoutIndex() const; 142 143 Qt::Orientation orientation; 144 }; 145 146 #endif // QT_CONFIG(scrollarea) 147 148 QT_END_NAMESPACE 149 150 #endif // QABSTRACTSCROLLAREA_P_H 151