summaryrefslogtreecommitdiffstats
path: root/src/quick/items/qquickitemchangelistener_p.h
blob: 83c69a9330a1c51fb12e49e81df0713d73df51ed (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtQuick module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QQUICKITEMCHANGELISTENER_P_H
#define QQUICKITEMCHANGELISTENER_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <QtCore/qglobal.h>

QT_BEGIN_NAMESPACE

class QRectF;
class QQuickItem;
class QQuickAnchorsPrivate;

class QQuickGeometryChange
{
public:
    enum Kind: int {
        Nothing = 0x00,
        X       = 0x01,
        Y       = 0x02,
        Width   = 0x04,
        Height  = 0x08,

        Size = Width | Height,
        All = X | Y | Size
    };

    QQuickGeometryChange(int change = Nothing)
        : kind(change)
    {}

    bool noChange() const { return kind == Nothing; }
    bool anyChange() const { return !noChange(); }

    bool xChange() const { return kind & X; }
    bool yChange() const { return kind & Y; }
    bool widthChange() const { return kind & Width; }
    bool heightChange() const { return kind & Height; }

    bool positionChange() const { return xChange() || yChange(); }
    bool sizeChange() const { return widthChange() || heightChange(); }

    bool horizontalChange() const { return xChange() || widthChange(); }
    bool verticalChange() const { return yChange() || heightChange(); }

    void setXChange(bool enabled) { set(X, enabled); }
    void setYChange(bool enabled) { set(Y, enabled); }
    void setWidthChange(bool enabled) { set(Width, enabled); }
    void setHeightChange(bool enabled) { set(Height, enabled); }
    void setSizeChange(bool enabled) { set(Size, enabled); }
    void setAllChanged(bool enabled) { set(All, enabled); }
    void setHorizontalChange(bool enabled) { set(X | Width, enabled); }
    void setVerticalChange(bool enabled) { set(Y | Height, enabled); }

    void set(int bits, bool enabled)
    {
        if (enabled) {
            kind |= bits;
        } else {
            kind &= ~bits;
        }
    }

    bool matches(QQuickGeometryChange other) const { return kind & other.kind; }

private:
    int kind;
};

#define QT_QUICK_NEW_GEOMETRY_CHANGED_HANDLING

class QQuickItemChangeListener
{
public:
    virtual ~QQuickItemChangeListener() {}

    virtual void itemGeometryChanged(QQuickItem *, QQuickGeometryChange, const QRectF & /* oldGeometry */) {}
    virtual void itemSiblingOrderChanged(QQuickItem *) {}
    virtual void itemVisibilityChanged(QQuickItem *) {}
    virtual void itemOpacityChanged(QQuickItem *) {}
    virtual void itemDestroyed(QQuickItem *) {}
    virtual void itemChildAdded(QQuickItem *, QQuickItem * /* child */ ) {}
    virtual void itemChildRemoved(QQuickItem *, QQuickItem * /* child */ ) {}
    virtual void itemParentChanged(QQuickItem *, QQuickItem * /* parent */ ) {}
    virtual void itemRotationChanged(QQuickItem *) {}
    virtual void itemImplicitWidthChanged(QQuickItem *) {}
    virtual void itemImplicitHeightChanged(QQuickItem *) {}

    virtual QQuickAnchorsPrivate *anchorPrivate() { return 0; }
};

QT_END_NAMESPACE

#endif // QQUICKITEMCHANGELISTENER_P_H