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39
40#ifndef QQUICKITEMCHANGELISTENER_P_H
41#define QQUICKITEMCHANGELISTENER_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 <QtCore/qglobal.h>
55
56QT_BEGIN_NAMESPACE
57
58class QRectF;
59class QQuickItem;
60class QQuickAnchorsPrivate;
61
62class QQuickGeometryChange
63{
64public:
65 enum Kind: int {
66 Nothing = 0x00,
67 X = 0x01,
68 Y = 0x02,
69 Width = 0x04,
70 Height = 0x08,
71
72 Size = Width | Height,
73 All = X | Y | Size
74 };
75
76 QQuickGeometryChange(int change = Nothing)
77 : kind(change)
78 {}
79
80 bool noChange() const { return kind == Nothing; }
81 bool anyChange() const { return !noChange(); }
82
83 bool xChange() const { return kind & X; }
84 bool yChange() const { return kind & Y; }
85 bool widthChange() const { return kind & Width; }
86 bool heightChange() const { return kind & Height; }
87
88 bool positionChange() const { return xChange() || yChange(); }
89 bool sizeChange() const { return widthChange() || heightChange(); }
90
91 bool horizontalChange() const { return xChange() || widthChange(); }
92 bool verticalChange() const { return yChange() || heightChange(); }
93
94 void setXChange(bool enabled) { set(X, enabled); }
95 void setYChange(bool enabled) { set(Y, enabled); }
96 void setWidthChange(bool enabled) { set(Width, enabled); }
97 void setHeightChange(bool enabled) { set(Height, enabled); }
98 void setSizeChange(bool enabled) { set(Size, enabled); }
99 void setAllChanged(bool enabled) { set(All, enabled); }
100 void setHorizontalChange(bool enabled) { set(X | Width, enabled); }
101 void setVerticalChange(bool enabled) { set(Y | Height, enabled); }
102
103 void set(int bits, bool enabled)
104 {
105 if (enabled) {
106 kind |= bits;
107 } else {
108 kind &= ~bits;
109 }
110 }
111
112 bool matches(QQuickGeometryChange other) const { return kind & other.kind; }
113
114private:
115 int kind;
116};
117
118#define QT_QUICK_NEW_GEOMETRY_CHANGED_HANDLING
119
120class QQuickItemChangeListener
121{
122public:
123 virtual ~QQuickItemChangeListener() {}
124
125 virtual void itemGeometryChanged(QQuickItem *, QQuickGeometryChange, const QRectF & /* oldGeometry */) {}
126 virtual void itemSiblingOrderChanged(QQuickItem *) {}
127 virtual void itemVisibilityChanged(QQuickItem *) {}
128 virtual void itemEnabledChanged(QQuickItem *) {}
129 virtual void itemOpacityChanged(QQuickItem *) {}
130 virtual void itemDestroyed(QQuickItem *) {}
131 virtual void itemChildAdded(QQuickItem *, QQuickItem * /* child */ ) {}
132 virtual void itemChildRemoved(QQuickItem *, QQuickItem * /* child */ ) {}
133 virtual void itemParentChanged(QQuickItem *, QQuickItem * /* parent */ ) {}
134 virtual void itemRotationChanged(QQuickItem *) {}
135 virtual void itemImplicitWidthChanged(QQuickItem *) {}
136 virtual void itemImplicitHeightChanged(QQuickItem *) {}
137
138 virtual QQuickAnchorsPrivate *anchorPrivate() { return nullptr; }
139};
140
141QT_END_NAMESPACE
142
143#endif // QQUICKITEMCHANGELISTENER_P_H
144