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2 | ** |
3 | ** Copyright (C) 2016 The Qt Company Ltd. |
4 | ** Contact: https://www.qt.io/licensing/ |
5 | ** |
6 | ** This file is part of the Qt Quick Layouts module of the Qt Toolkit. |
7 | ** |
8 | ** $QT_BEGIN_LICENSE:LGPL$ |
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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 |
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38 | ****************************************************************************/ |
39 | |
40 | #ifndef QQUICKSTACKLAYOUT_H |
41 | #define QQUICKSTACKLAYOUT_H |
42 | |
43 | #include <qquicklayout_p.h> |
44 | |
45 | QT_BEGIN_NAMESPACE |
46 | |
47 | class QQuickStackLayoutPrivate; |
48 | |
49 | class QQuickStackLayout : public QQuickLayout |
50 | { |
51 | Q_OBJECT |
52 | Q_PROPERTY(int count READ count NOTIFY countChanged) |
53 | Q_PROPERTY(int currentIndex READ currentIndex WRITE setCurrentIndex NOTIFY currentIndexChanged) |
54 | QML_NAMED_ELEMENT(StackLayout) |
55 | QML_ADDED_IN_MINOR_VERSION(3) |
56 | |
57 | public: |
58 | explicit QQuickStackLayout(QQuickItem *parent = 0); |
59 | int count() const; |
60 | int currentIndex() const; |
61 | void setCurrentIndex(int index); |
62 | |
63 | void componentComplete() override; |
64 | void itemChange(ItemChange change, const ItemChangeData &value) override; |
65 | QSizeF sizeHint(Qt::SizeHint whichSizeHint) const override; |
66 | void setAlignment(QQuickItem *item, Qt::Alignment align) override; |
67 | void invalidate(QQuickItem *childItem = 0) override; |
68 | void updateLayoutItems() override; |
69 | void rearrange(const QSizeF &) override; |
70 | |
71 | // iterator |
72 | Q_INVOKABLE QQuickItem *itemAt(int index) const override; |
73 | int itemCount() const override; |
74 | int indexOf(QQuickItem *item) const; |
75 | |
76 | |
77 | |
78 | signals: |
79 | void currentIndexChanged(); |
80 | void countChanged(); |
81 | |
82 | public slots: |
83 | |
84 | private: |
85 | static void collectItemSizeHints(QQuickItem *item, QSizeF *sizeHints); |
86 | bool shouldIgnoreItem(QQuickItem *item) const; |
87 | Q_DECLARE_PRIVATE(QQuickStackLayout) |
88 | |
89 | QList<QQuickItem*> m_items; |
90 | |
91 | typedef struct { |
92 | inline QSizeF &min() { return array[Qt::MinimumSize]; } |
93 | inline QSizeF &pref() { return array[Qt::PreferredSize]; } |
94 | inline QSizeF &max() { return array[Qt::MaximumSize]; } |
95 | QSizeF array[Qt::NSizeHints]; |
96 | } SizeHints; |
97 | |
98 | mutable QVector<SizeHints> m_cachedItemSizeHints; |
99 | mutable QSizeF m_cachedSizeHints[Qt::NSizeHints]; |
100 | }; |
101 | |
102 | class QQuickStackLayoutPrivate : public QQuickLayoutPrivate |
103 | { |
104 | Q_DECLARE_PUBLIC(QQuickStackLayout) |
105 | public: |
106 | QQuickStackLayoutPrivate() : count(0), currentIndex(-1), explicitCurrentIndex(false) {} |
107 | private: |
108 | int count; |
109 | int currentIndex; |
110 | bool explicitCurrentIndex; |
111 | }; |
112 | |
113 | QT_END_NAMESPACE |
114 | |
115 | #endif // QQUICKSTACKLAYOUT_H |
116 |