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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 
62 QT_REQUIRE_CONFIG(graphicsview);
63 
64 QT_BEGIN_NAMESPACE
65 
66 class QGraphicsLayoutPrivate;
67 
68 class QGraphicsGridLayoutEngineItem : public QGridLayoutItem {
69 public:
70     QGraphicsGridLayoutEngineItem(QGraphicsLayoutItem *item, int row, int columns, int rowSpan = 1, int columnSpan = 1,
71                             Qt::Alignment alignment = { })
QGridLayoutItem(row,columns,rowSpan,columnSpan,alignment)72         : QGridLayoutItem(row, columns, rowSpan, columnSpan, alignment), q_layoutItem(item) {}
73 
sizePolicy(Qt::Orientation orientation)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 
controlTypes(LayoutSide)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 
sizeHint(Qt::SizeHint which,const QSizeF & constraint)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 
setGeometry(const QRectF & rect)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 
layoutItem()104     QGraphicsLayoutItem *layoutItem() const { return q_layoutItem; }
105 
106 protected:
107     QGraphicsLayoutItem *q_layoutItem;
108 };
109 
110 
111 class QGraphicsGridLayoutEngine : public QGridLayoutEngine
112 {
113 public:
findLayoutItem(QGraphicsLayoutItem * layoutItem)114     QGraphicsGridLayoutEngineItem *findLayoutItem(QGraphicsLayoutItem *layoutItem) const
115     {
116         const int index = indexOf(layoutItem);
117         if (index < 0)
118             return nullptr;
119         return static_cast<QGraphicsGridLayoutEngineItem*>(q_items.at(index));
120     }
121 
indexOf(QGraphicsLayoutItem * item)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 
139 QT_END_NAMESPACE
140 
141 #endif // QGRAPHICSGRIDLAYOUTENGINE_P_H
142