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qqmlboundsignal_p.h

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1/****************************************************************************-
2**-
3** Copyright (C) 2016 The Qt Company Ltd.-
4** Contact: https://www.qt.io/licensing/-
5**-
6** This file is part of the QtQml module of the Qt Toolkit.-
7**-
8** $QT_BEGIN_LICENSE:LGPL$-
9** Commercial License Usage-
10** Licensees holding valid commercial Qt licenses may use this file in-
11** accordance with the commercial license agreement provided with the-
12** Software or, alternatively, in accordance with the terms contained in-
13** a written agreement between you and The Qt Company. For licensing terms-
14** and conditions see https://www.qt.io/terms-conditions. For further-
15** information use the contact form at https://www.qt.io/contact-us.-
16**-
17** GNU Lesser General Public License Usage-
18** Alternatively, this file may be used under the terms of the GNU Lesser-
19** General Public License version 3 as published by the Free Software-
20** Foundation and appearing in the file LICENSE.LGPL3 included in the-
21** packaging of this file. Please review the following information to-
22** ensure the GNU Lesser General Public License version 3 requirements-
23** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.-
24**-
25** GNU General Public License Usage-
26** Alternatively, this file may be used under the terms of the GNU-
27** General Public License version 2.0 or (at your option) the GNU General-
28** Public license version 3 or any later version approved by the KDE Free-
29** Qt Foundation. The licenses are as published by the Free Software-
30** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3-
31** included in the packaging of this file. Please review the following-
32** information to ensure the GNU General Public License requirements will-
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34** https://www.gnu.org/licenses/gpl-3.0.html.-
35**-
36** $QT_END_LICENSE$-
37**-
38****************************************************************************/-
39-
40#ifndef QQMLBOUNDSIGNAL_P_H-
41#define QQMLBOUNDSIGNAL_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/qmetaobject.h>-
55-
56#include <private/qqmljavascriptexpression_p.h>-
57#include <private/qqmlboundsignalexpressionpointer_p.h>-
58#include <private/qqmlnotifier_p.h>-
59#include <private/qflagpointer_p.h>-
60#include <private/qqmlrefcount_p.h>-
61#include <private/qqmlglobal_p.h>-
62#include <private/qbitfield_p.h>-
63-
64QT_BEGIN_NAMESPACE-
65-
66class Q_QML_PRIVATE_EXPORT QQmlBoundSignalExpression : public QQmlJavaScriptExpression, public QQmlRefCount-
67{-
68public:-
69 QQmlBoundSignalExpression(QObject *target, int index,-
70 QQmlContextData *ctxt, QObject *scope, const QString &expression,-
71 const QString &fileName, quint16 line, quint16 column,-
72 const QString &handlerName = QString(),-
73 const QString &parameterString = QString());-
74-
75 QQmlBoundSignalExpression(QObject *target, int index,-
76 QQmlContextData *ctxt, QObject *scopeObject, QV4::Function *function, QV4::ExecutionContext *scope);-
77-
78 QQmlBoundSignalExpression(QObject *target, int index,-
79 QQmlContextData *ctxt, QObject *scope, QV4::Function *runtimeFunction);-
80-
81 // inherited from QQmlJavaScriptExpression.-
82 QString expressionIdentifier() const override;-
83 void expressionChanged() override;-
84-
85 // evaluation of a bound signal expression doesn't return any value-
86 void evaluate(void **a);-
87 void evaluate(const QList<QVariant> &args);-
88-
89 QString expression() const;-
90 QObject *target() const { return m_target; }
never executed: return m_target;
0
91-
92 QQmlEngine *engine() const { return context() ? context()->engine : nullptr; }
never executed: return context() ? context()->engine : nullptr;
0
93-
94private:-
95 ~QQmlBoundSignalExpression() override;-
96-
97 void init(QQmlContextData *ctxt, QObject *scope);-
98-
99 bool expressionFunctionValid() const { return function() != nullptr; }
never executed: return function() != nullptr;
0
100-
101 int m_index;-
102 QObject *m_target;-
103};-
104-
105class Q_QML_PRIVATE_EXPORT QQmlBoundSignal : public QQmlNotifierEndpoint-
106{-
107public:-
108 QQmlBoundSignal(QObject *target, int signal, QObject *owner, QQmlEngine *engine);-
109 ~QQmlBoundSignal();-
110-
111 void removeFromObject();-
112-
113 QQmlBoundSignalExpression *expression() const;-
114 void takeExpression(QQmlBoundSignalExpression *);-
115-
116 void setEnabled(bool enabled);-
117-
118private:-
119 friend void QQmlBoundSignal_callback(QQmlNotifierEndpoint *, void **);-
120 friend class QQmlPropertyPrivate;-
121 friend class QQmlData;-
122 friend class QQmlEngineDebugService;-
123-
124 void addToObject(QObject *owner);-
125-
126 QQmlBoundSignal **m_prevSignal;-
127 QQmlBoundSignal *m_nextSignal;-
128-
129 bool m_enabled;-
130-
131 QQmlBoundSignalExpressionPointer m_expression;-
132};-
133-
134QT_END_NAMESPACE-
135-
136#endif // QQMLBOUNDSIGNAL_P_H-
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