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39
40#ifndef QGRAPHICSLAYOUTITEM_H
41#define QGRAPHICSLAYOUTITEM_H
42
43#include <QtWidgets/qtwidgetsglobal.h>
44#include <QtCore/qscopedpointer.h>
45#include <QtWidgets/qsizepolicy.h>
46#include <QtGui/qevent.h>
47
48QT_REQUIRE_CONFIG(graphicsview);
49
50QT_BEGIN_NAMESPACE
51
52class QGraphicsLayoutItemPrivate;
53class QGraphicsItem;
54class Q_WIDGETS_EXPORT QGraphicsLayoutItem
55{
56public:
57 QGraphicsLayoutItem(QGraphicsLayoutItem *parent = nullptr, bool isLayout = false);
58 virtual ~QGraphicsLayoutItem();
59
60 void setSizePolicy(const QSizePolicy &policy);
61 void setSizePolicy(QSizePolicy::Policy hPolicy, QSizePolicy::Policy vPolicy, QSizePolicy::ControlType controlType = QSizePolicy::DefaultType);
62 QSizePolicy sizePolicy() const;
63
64 void setMinimumSize(const QSizeF &size);
65 inline void setMinimumSize(qreal w, qreal h);
66 QSizeF minimumSize() const;
67 void setMinimumWidth(qreal width);
68 inline qreal minimumWidth() const;
69 void setMinimumHeight(qreal height);
70 inline qreal minimumHeight() const;
71
72 void setPreferredSize(const QSizeF &size);
73 inline void setPreferredSize(qreal w, qreal h);
74 QSizeF preferredSize() const;
75 void setPreferredWidth(qreal width);
76 inline qreal preferredWidth() const;
77 void setPreferredHeight(qreal height);
78 inline qreal preferredHeight() const;
79
80 void setMaximumSize(const QSizeF &size);
81 inline void setMaximumSize(qreal w, qreal h);
82 QSizeF maximumSize() const;
83 void setMaximumWidth(qreal width);
84 inline qreal maximumWidth() const;
85 void setMaximumHeight(qreal height);
86 inline qreal maximumHeight() const;
87
88 virtual void setGeometry(const QRectF &rect);
89 QRectF geometry() const;
90 virtual void getContentsMargins(qreal *left, qreal *top, qreal *right, qreal *bottom) const;
91 QRectF contentsRect() const;
92
93 QSizeF effectiveSizeHint(Qt::SizeHint which, const QSizeF &constraint = QSizeF()) const;
94
95 virtual void updateGeometry();
96
97 QGraphicsLayoutItem *parentLayoutItem() const;
98 void setParentLayoutItem(QGraphicsLayoutItem *parent);
99
100 bool isLayout() const;
101 QGraphicsItem *graphicsItem() const;
102 bool ownedByLayout() const;
103
104protected:
105 void setGraphicsItem(QGraphicsItem *item);
106 void setOwnedByLayout(bool ownedByLayout);
107 QGraphicsLayoutItem(QGraphicsLayoutItemPrivate &dd);
108
109 virtual QSizeF sizeHint(Qt::SizeHint which, const QSizeF &constraint = QSizeF()) const = 0;
110 QScopedPointer<QGraphicsLayoutItemPrivate> d_ptr;
111
112private:
113 QSizeF *effectiveSizeHints(const QSizeF &constraint) const;
114 Q_DECLARE_PRIVATE(QGraphicsLayoutItem)
115
116 friend class QGraphicsLayout;
117};
118
119#ifndef Q_CLANG_QDOC
120Q_DECLARE_INTERFACE(QGraphicsLayoutItem, "org.qt-project.Qt.QGraphicsLayoutItem")
121#endif
122
123inline void QGraphicsLayoutItem::setMinimumSize(qreal aw, qreal ah)
124{ setMinimumSize(QSizeF(aw, ah)); }
125inline void QGraphicsLayoutItem::setPreferredSize(qreal aw, qreal ah)
126{ setPreferredSize(QSizeF(aw, ah)); }
127inline void QGraphicsLayoutItem::setMaximumSize(qreal aw, qreal ah)
128{ setMaximumSize(QSizeF(aw, ah)); }
129
130inline qreal QGraphicsLayoutItem::minimumWidth() const
131{ return effectiveSizeHint(which: Qt::MinimumSize).width(); }
132inline qreal QGraphicsLayoutItem::minimumHeight() const
133{ return effectiveSizeHint(which: Qt::MinimumSize).height(); }
134
135inline qreal QGraphicsLayoutItem::preferredWidth() const
136{ return effectiveSizeHint(which: Qt::PreferredSize).width(); }
137inline qreal QGraphicsLayoutItem::preferredHeight() const
138{ return effectiveSizeHint(which: Qt::PreferredSize).height(); }
139
140inline qreal QGraphicsLayoutItem::maximumWidth() const
141{ return effectiveSizeHint(which: Qt::MaximumSize).width(); }
142inline qreal QGraphicsLayoutItem::maximumHeight() const
143{ return effectiveSizeHint(which: Qt::MaximumSize).height(); }
144
145QT_END_NAMESPACE
146
147#endif
148

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