1/****************************************************************************
2**
3** Copyright (C) 2016 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the QtWidgets module of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
11** accordance with the commercial license agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and The Qt Company. For licensing terms
14** and conditions see https://www.qt.io/terms-conditions. For further
15** information use the contact form at https://www.qt.io/contact-us.
16**
17** GNU Lesser General Public License Usage
18** Alternatively, this file may be used under the terms of the GNU Lesser
19** General Public License version 3 as published by the Free Software
20** Foundation and appearing in the file LICENSE.LGPL3 included in the
21** packaging of this file. Please review the following information to
22** ensure the GNU Lesser General Public License version 3 requirements
23** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
24**
25** GNU General Public License Usage
26** Alternatively, this file may be used under the terms of the GNU
27** General Public License version 2.0 or (at your option) the GNU General
28** Public license version 3 or any later version approved by the KDE Free
29** Qt Foundation. The licenses are as published by the Free Software
30** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
31** included in the packaging of this file. Please review the following
32** information to ensure the GNU General Public License requirements will
33** be met: https://www.gnu.org/licenses/gpl-2.0.html and
34** https://www.gnu.org/licenses/gpl-3.0.html.
35**
36** $QT_END_LICENSE$
37**
38****************************************************************************/
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 virtual void setGeometry(const QRectF &rect) override
93 {
94 q_layoutItem->setGeometry(rect);
95 }
96
97 virtual bool hasDynamicConstraint() const override;
98 virtual Qt::Orientation dynamicConstraintOrientation() const override;
99
100 virtual bool isEmpty() const override;
101
102 QGraphicsLayoutItem *layoutItem() const { return q_layoutItem; }
103
104protected:
105 QGraphicsLayoutItem *q_layoutItem;
106};
107
108
109class QGraphicsGridLayoutEngine : public QGridLayoutEngine
110{
111public:
112 QGraphicsGridLayoutEngineItem *findLayoutItem(QGraphicsLayoutItem *layoutItem) const
113 {
114 const int index = indexOf(layoutItem);
115 if (index < 0)
116 return nullptr;
117 return static_cast<QGraphicsGridLayoutEngineItem*>(q_items.at(index));
118 }
119
120 int indexOf(QGraphicsLayoutItem *item) const
121 {
122 for (int i = 0; i < q_items.count(); ++i) {
123 if (item == static_cast<QGraphicsGridLayoutEngineItem*>(q_items.at(i))->layoutItem())
124 return i;
125 }
126 return -1;
127 }
128
129 void setAlignment(QGraphicsLayoutItem *graphicsLayoutItem, Qt::Alignment alignment);
130 Qt::Alignment alignment(QGraphicsLayoutItem *graphicsLayoutItem) const;
131
132 void setStretchFactor(QGraphicsLayoutItem *layoutItem, int stretch, Qt::Orientation orientation);
133 int stretchFactor(QGraphicsLayoutItem *layoutItem, Qt::Orientation orientation) const;
134
135};
136
137QT_END_NAMESPACE
138
139#endif // QGRAPHICSGRIDLAYOUTENGINE_P_H
140