blob: bea2d253e486ca679b0786dc040e16edef881681 (
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
143
144
145
146
147
148
149
150
151
152
153
154
155
|
/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtQml 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 QQMLABSTRACTBINDING_P_H
#define QQMLABSTRACTBINDING_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/qsharedpointer.h>
#include <QtCore/qshareddata.h>
#include <private/qtqmlglobal_p.h>
#include <private/qqmlproperty_p.h>
QT_BEGIN_NAMESPACE
class QQmlObjectCreator;
class Q_QML_PRIVATE_EXPORT QQmlAbstractBinding
{
protected:
QQmlAbstractBinding();
public:
virtual ~QQmlAbstractBinding();
typedef QExplicitlySharedDataPointer<QQmlAbstractBinding> Ptr;
virtual QString expression() const;
virtual bool isValueTypeProxy() const;
// Should return the encoded property index for the binding. Should return this value
// even if the binding is not enabled or added to an object.
// Encoding is: coreIndex | (valueTypeIndex << 16)
QQmlPropertyIndex targetPropertyIndex() const { return m_targetIndex; }
// Should return the object for the binding. Should return this object even if the
// binding is not enabled or added to the object.
QObject *targetObject() const { return m_target.data(); }
virtual void setEnabled(bool e, QQmlPropertyData::WriteFlags f = QQmlPropertyData::DontRemoveBinding) = 0;
void addToObject();
void removeFromObject();
static void printBindingLoopError(QQmlProperty &prop);
inline QQmlAbstractBinding *nextBinding() const;
inline bool canUseAccessor() const
{ return m_nextBinding.flag2(); }
struct RefCount {
RefCount() : refCount(0) {}
int refCount;
void ref() { ++refCount; }
int deref() { return --refCount; }
operator int() const { return refCount; }
};
RefCount ref;
protected:
friend class QQmlData;
friend class QQmlValueTypeProxyBinding;
friend class QQmlObjectCreator;
inline void setAddedToObject(bool v);
inline bool isAddedToObject() const;
inline void setNextBinding(QQmlAbstractBinding *);
QQmlPropertyIndex m_targetIndex;
// Pointer is the target object to which the binding binds
// flag1 is the updating flag
// flag2 is the enabled flag
QFlagPointer<QObject> m_target;
// Pointer to the next binding in the linked list of bindings.
// flag1 is used for addedToObject
// flag2 indicates if an accessor is can be used (i.e. there is no interceptor on the target)
QFlagPointer<QQmlAbstractBinding> m_nextBinding;
};
void QQmlAbstractBinding::setAddedToObject(bool v)
{
m_nextBinding.setFlagValue(v);
}
bool QQmlAbstractBinding::isAddedToObject() const
{
return m_nextBinding.flag();
}
QQmlAbstractBinding *QQmlAbstractBinding::nextBinding() const
{
return m_nextBinding.data();
}
void QQmlAbstractBinding::setNextBinding(QQmlAbstractBinding *b)
{
if (b)
b->ref.ref();
if (m_nextBinding.data() && !m_nextBinding->ref.deref())
delete m_nextBinding.data();
m_nextBinding = b;
}
QT_END_NAMESPACE
#endif // QQMLABSTRACTBINDING_P_H
|
