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39
40#ifndef QSCROLLBAR_H
41#define QSCROLLBAR_H
42
43#include <QtWidgets/qtwidgetsglobal.h>
44#include <QtWidgets/qwidget.h>
45
46#include <QtWidgets/qabstractslider.h>
47
48QT_REQUIRE_CONFIG(scrollbar);
49
50QT_BEGIN_NAMESPACE
51
52class QScrollBarPrivate;
53class QStyleOptionSlider;
54
55class Q_WIDGETS_EXPORT QScrollBar : public QAbstractSlider
56{
57 Q_OBJECT
58public:
59 explicit QScrollBar(QWidget *parent = nullptr);
60 explicit QScrollBar(Qt::Orientation, QWidget *parent = nullptr);
61 ~QScrollBar();
62
63 QSize sizeHint() const override;
64 bool event(QEvent *event) override;
65
66protected:
67#if QT_CONFIG(wheelevent)
68 void wheelEvent(QWheelEvent *) override;
69#endif
70 void paintEvent(QPaintEvent *) override;
71 void mousePressEvent(QMouseEvent *) override;
72 void mouseReleaseEvent(QMouseEvent *) override;
73 void mouseMoveEvent(QMouseEvent *) override;
74 void hideEvent(QHideEvent*) override;
75 void sliderChange(SliderChange change) override;
76#ifndef QT_NO_CONTEXTMENU
77 void contextMenuEvent(QContextMenuEvent *) override;
78#endif
79 void initStyleOption(QStyleOptionSlider *option) const;
80
81
82private:
83 friend class QAbstractScrollAreaPrivate;
84 friend Q_WIDGETS_EXPORT QStyleOptionSlider qt_qscrollbarStyleOption(QScrollBar *scrollBar);
85
86 Q_DISABLE_COPY(QScrollBar)
87 Q_DECLARE_PRIVATE(QScrollBar)
88#if QT_CONFIG(itemviews)
89 friend class QTableView;
90 friend class QTreeViewPrivate;
91 friend class QCommonListViewBase;
92 friend class QListModeViewBase;
93 friend class QAbstractItemView;
94#endif
95};
96
97QT_END_NAMESPACE
98
99#endif // QSCROLLBAR_H
100

source code of qtbase/src/widgets/widgets/qscrollbar.h