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
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtQml module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:COMM$
**
** 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.
**
** $QT_END_LICENSE$
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
****************************************************************************/
#ifndef QQMLBINDING_P_H
#define QQMLBINDING_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 "qqml.h"
#include "qqmlpropertyvaluesource.h"
#include "qqmlexpression.h"
#include "qqmlproperty.h"
#include "qqmlscriptstring.h"
#include "qqmlproperty_p.h"
#include <QtCore/QObject>
#include <QtCore/QMetaProperty>
#include <private/qqmlabstractbinding_p.h>
#include <private/qqmljavascriptexpression_p.h>
#include <private/qv4functionobject_p.h>
QT_BEGIN_NAMESPACE
class QQmlContext;
class Q_QML_PRIVATE_EXPORT QQmlBinding : public QQmlJavaScriptExpression,
public QQmlAbstractBinding
{
friend class QQmlAbstractBinding;
public:
typedef QExplicitlySharedDataPointer<QQmlBinding> Ptr;
static QQmlBinding *create(const QQmlPropertyData *, const QQmlScriptString &, QObject *, QQmlContext *);
static QQmlBinding *create(const QQmlPropertyData *, const QString &, QObject *, QQmlContextData *,
const QString &url = QString(), quint16 lineNumber = 0);
static QQmlBinding *create(const QQmlPropertyData *property, QV4::Function *function,
QObject *obj, QQmlContextData *ctxt, QV4::ExecutionContext *scope);
static QQmlBinding *createTranslationBinding(const QQmlRefPointer<QV4::ExecutableCompilationUnit> &unit, const QV4::CompiledData::Binding *binding,
QObject *obj, QQmlContextData *ctxt);
~QQmlBinding() override;
void setTarget(const QQmlProperty &);
bool setTarget(QObject *, const QQmlPropertyData &, const QQmlPropertyData *valueType);
void setNotifyOnValueChanged(bool);
void refresh() override;
void setEnabled(bool, QQmlPropertyData::WriteFlags flags = QQmlPropertyData::DontRemoveBinding) override;
QString expression() const override;
void update(QQmlPropertyData::WriteFlags flags = QQmlPropertyData::DontRemoveBinding);
typedef int Identifier;
enum {
Invalid = -1
};
QVariant evaluate();
QString expressionIdentifier() const override;
void expressionChanged() override;
QQmlSourceLocation sourceLocation() const override;
void setSourceLocation(const QQmlSourceLocation &location);
void setBoundFunction(QV4::BoundFunction *boundFunction) {
m_boundFunction.set(boundFunction->engine(), *boundFunction);
}
/**
* This method returns a snapshot of the currently tracked dependencies of
* this binding. The dependencies can change upon reevaluation. This method is
* used in GammaRay to visualize binding hierarchies.
*
* Call this method from the UI thread.
*/
QVector<QQmlProperty> dependencies() const;
virtual bool hasDependencies() const;
protected:
virtual void doUpdate(const DeleteWatcher &watcher,
QQmlPropertyData::WriteFlags flags, QV4::Scope &scope) = 0;
void getPropertyData(QQmlPropertyData **propertyData, QQmlPropertyData *valueTypeData) const;
int getPropertyType() const;
bool slowWrite(const QQmlPropertyData &core, const QQmlPropertyData &valueTypeData,
const QV4::Value &result, bool isUndefined, QQmlPropertyData::WriteFlags flags);
QV4::ReturnedValue evaluate(bool *isUndefined);
private:
inline bool updatingFlag() const;
inline void setUpdatingFlag(bool);
inline bool enabledFlag() const;
inline void setEnabledFlag(bool);
static QQmlBinding *newBinding(QQmlEnginePrivate *engine, const QQmlPropertyData *property);
QQmlSourceLocation *m_sourceLocation = nullptr; // used for Qt.binding() created functions
QV4::PersistentValue m_boundFunction; // used for Qt.binding() that are created from a bound function object
};
bool QQmlBinding::updatingFlag() const
{
return m_target.flag();
}
void QQmlBinding::setUpdatingFlag(bool v)
{
m_target.setFlagValue(v);
}
bool QQmlBinding::enabledFlag() const
{
return m_target.flag2();
}
void QQmlBinding::setEnabledFlag(bool v)
{
m_target.setFlag2Value(v);
}
QT_END_NAMESPACE
Q_DECLARE_METATYPE(QQmlBinding*)
#endif // QQMLBINDING_P_H
|
