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39
40#ifndef QGRAPHICSGRIDLAYOUTENGINE_P_H
41#define QGRAPHICSGRIDLAYOUTENGINE_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 <QtGui/private/qgridlayoutengine_p.h>
56
57#include <QtWidgets/qsizepolicy.h>
58#include <QtWidgets/qstyle.h>
59#include <QtWidgets/qstyleoption.h>
60#include "qgraphicslayoutitem.h"
61
62QT_REQUIRE_CONFIG(graphicsview);
63
64QT_BEGIN_NAMESPACE
65
66class QGraphicsLayoutPrivate;
67
68class QGraphicsGridLayoutEngineItem : public QGridLayoutItem {
69public:
70 QGraphicsGridLayoutEngineItem(QGraphicsLayoutItem *item, int row, int columns, int rowSpan = 1, int columnSpan = 1,
71 Qt::Alignment alignment = { })
72 : QGridLayoutItem(row, columns, rowSpan, columnSpan, alignment), q_layoutItem(item) {}
73
74 virtual QLayoutPolicy::Policy sizePolicy(Qt::Orientation orientation) const override
75 {
76 QSizePolicy sizePolicy(q_layoutItem->sizePolicy());
77 return (QLayoutPolicy::Policy)((orientation == Qt::Horizontal) ? sizePolicy.horizontalPolicy()
78 : sizePolicy.verticalPolicy());
79 }
80
81 virtual QLayoutPolicy::ControlTypes controlTypes(LayoutSide) const override
82 {
83 const QSizePolicy::ControlType ct = q_layoutItem->sizePolicy().controlType();
84 return (QLayoutPolicy::ControlTypes)ct;
85 }
86
87 virtual QSizeF sizeHint(Qt::SizeHint which, const QSizeF &constraint) const override
88 {
89 return q_layoutItem->effectiveSizeHint(which, constraint);
90 }
91
92 bool isHidden() const;
93
94 virtual bool isIgnored() const override;
95
96 virtual void setGeometry(const QRectF &rect) override
97 {
98 q_layoutItem->setGeometry(rect);
99 }
100
101 virtual bool hasDynamicConstraint() const override;
102 virtual Qt::Orientation dynamicConstraintOrientation() const override;
103
104 QGraphicsLayoutItem *layoutItem() const { return q_layoutItem; }
105
106protected:
107 QGraphicsLayoutItem *q_layoutItem;
108};
109
110
111class QGraphicsGridLayoutEngine : public QGridLayoutEngine
112{
113public:
114 QGraphicsGridLayoutEngineItem *findLayoutItem(QGraphicsLayoutItem *layoutItem) const
115 {
116 const int index = indexOf(item: layoutItem);
117 if (index < 0)
118 return nullptr;
119 return static_cast<QGraphicsGridLayoutEngineItem*>(q_items.at(i: index));
120 }
121
122 int indexOf(QGraphicsLayoutItem *item) const
123 {
124 for (int i = 0; i < q_items.count(); ++i) {
125 if (item == static_cast<QGraphicsGridLayoutEngineItem*>(q_items.at(i))->layoutItem())
126 return i;
127 }
128 return -1;
129 }
130
131 void setAlignment(QGraphicsLayoutItem *graphicsLayoutItem, Qt::Alignment alignment);
132 Qt::Alignment alignment(QGraphicsLayoutItem *graphicsLayoutItem) const;
133
134 void setStretchFactor(QGraphicsLayoutItem *layoutItem, int stretch, Qt::Orientation orientation);
135 int stretchFactor(QGraphicsLayoutItem *layoutItem, Qt::Orientation orientation) const;
136
137};
138
139QT_END_NAMESPACE
140
141#endif // QGRAPHICSGRIDLAYOUTENGINE_P_H
142

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