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 QGRAPHICSANCHORLAYOUT_H
41#define QGRAPHICSANCHORLAYOUT_H
42
43#include <QtWidgets/qtwidgetsglobal.h>
44#include <QtWidgets/qgraphicsitem.h>
45#include <QtWidgets/qgraphicslayout.h>
46
47QT_REQUIRE_CONFIG(graphicsview);
48
49QT_BEGIN_NAMESPACE
50
51class QGraphicsAnchorPrivate;
52class QGraphicsAnchorLayout;
53class QGraphicsAnchorLayoutPrivate;
54
55class Q_WIDGETS_EXPORT QGraphicsAnchor : public QObject
56{
57 Q_OBJECT
58 Q_PROPERTY(qreal spacing READ spacing WRITE setSpacing RESET unsetSpacing)
59 Q_PROPERTY(QSizePolicy::Policy sizePolicy READ sizePolicy WRITE setSizePolicy)
60public:
61 void setSpacing(qreal spacing);
62 void unsetSpacing();
63 qreal spacing() const;
64 void setSizePolicy(QSizePolicy::Policy policy);
65 QSizePolicy::Policy sizePolicy() const;
66 ~QGraphicsAnchor();
67private:
68 QGraphicsAnchor(QGraphicsAnchorLayout *parent);
69
70 Q_DECLARE_PRIVATE(QGraphicsAnchor)
71
72 friend class QGraphicsAnchorLayoutPrivate;
73};
74
75class Q_WIDGETS_EXPORT QGraphicsAnchorLayout : public QGraphicsLayout
76{
77public:
78 QGraphicsAnchorLayout(QGraphicsLayoutItem *parent = nullptr);
79 virtual ~QGraphicsAnchorLayout();
80
81 QGraphicsAnchor *addAnchor(QGraphicsLayoutItem *firstItem, Qt::AnchorPoint firstEdge,
82 QGraphicsLayoutItem *secondItem, Qt::AnchorPoint secondEdge);
83 QGraphicsAnchor *anchor(QGraphicsLayoutItem *firstItem, Qt::AnchorPoint firstEdge,
84 QGraphicsLayoutItem *secondItem, Qt::AnchorPoint secondEdge);
85
86 void addCornerAnchors(QGraphicsLayoutItem *firstItem, Qt::Corner firstCorner,
87 QGraphicsLayoutItem *secondItem, Qt::Corner secondCorner);
88
89 void addAnchors(QGraphicsLayoutItem *firstItem,
90 QGraphicsLayoutItem *secondItem,
91 Qt::Orientations orientations = Qt::Horizontal | Qt::Vertical);
92
93 void setHorizontalSpacing(qreal spacing);
94 void setVerticalSpacing(qreal spacing);
95 void setSpacing(qreal spacing);
96 qreal horizontalSpacing() const;
97 qreal verticalSpacing() const;
98
99 void removeAt(int index) override;
100 void setGeometry(const QRectF &rect) override;
101 int count() const override;
102 QGraphicsLayoutItem *itemAt(int index) const override;
103
104 void invalidate() override;
105protected:
106 QSizeF sizeHint(Qt::SizeHint which, const QSizeF &constraint = QSizeF()) const override;
107
108private:
109 Q_DISABLE_COPY(QGraphicsAnchorLayout)
110 Q_DECLARE_PRIVATE(QGraphicsAnchorLayout)
111
112 friend class QGraphicsAnchor;
113};
114
115QT_END_NAMESPACE
116
117#endif
118

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