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39
40#ifndef QGRAPHICSLAYOUT_H
41#define QGRAPHICSLAYOUT_H
42
43#include <QtWidgets/qtwidgetsglobal.h>
44#include <QtWidgets/qgraphicslayoutitem.h>
45
46QT_REQUIRE_CONFIG(graphicsview);
47
48QT_BEGIN_NAMESPACE
49
50class QGraphicsLayoutPrivate;
51class QGraphicsLayoutItem;
52class QGraphicsWidget;
53
54class Q_WIDGETS_EXPORT QGraphicsLayout : public QGraphicsLayoutItem
55{
56public:
57 QGraphicsLayout(QGraphicsLayoutItem *parent = nullptr);
58 ~QGraphicsLayout();
59
60 void setContentsMargins(qreal left, qreal top, qreal right, qreal bottom);
61 void getContentsMargins(qreal *left, qreal *top, qreal *right, qreal *bottom) const override;
62
63 void activate();
64 bool isActivated() const;
65 virtual void invalidate();
66 virtual void updateGeometry() override;
67
68 virtual void widgetEvent(QEvent *e);
69
70 virtual int count() const = 0;
71 virtual QGraphicsLayoutItem *itemAt(int i) const = 0;
72 virtual void removeAt(int index) = 0;
73
74 static void setInstantInvalidatePropagation(bool enable);
75 static bool instantInvalidatePropagation();
76protected:
77 QGraphicsLayout(QGraphicsLayoutPrivate &, QGraphicsLayoutItem *);
78 void addChildLayoutItem(QGraphicsLayoutItem *layoutItem);
79
80private:
81 Q_DISABLE_COPY(QGraphicsLayout)
82 Q_DECLARE_PRIVATE(QGraphicsLayout)
83 friend class QGraphicsWidget;
84};
85
86#ifndef Q_CLANG_QDOC
87Q_DECLARE_INTERFACE(QGraphicsLayout, "org.qt-project.Qt.QGraphicsLayout")
88#endif
89
90QT_END_NAMESPACE
91
92#endif
93

source code of qtbase/src/widgets/graphicsview/qgraphicslayout.h