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39
40#ifndef QQUICKSTACKLAYOUT_H
41#define QQUICKSTACKLAYOUT_H
42
43#include <qquicklayout_p.h>
44
45QT_BEGIN_NAMESPACE
46
47class QQuickStackLayoutPrivate;
48
49class 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
57public:
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
78signals:
79 void currentIndexChanged();
80 void countChanged();
81
82public slots:
83
84private:
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
102class QQuickStackLayoutPrivate : public QQuickLayoutPrivate
103{
104 Q_DECLARE_PUBLIC(QQuickStackLayout)
105public:
106 QQuickStackLayoutPrivate() : count(0), currentIndex(-1), explicitCurrentIndex(false) {}
107private:
108 int count;
109 int currentIndex;
110 bool explicitCurrentIndex;
111};
112
113QT_END_NAMESPACE
114
115#endif // QQUICKSTACKLAYOUT_H
116

source code of qtdeclarative/src/imports/layouts/qquickstacklayout_p.h