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39
40#ifndef SIGNALTRANSITION_H
41#define SIGNALTRANSITION_H
42
43#include <QtCore/QSignalTransition>
44#include <QtCore/QVariant>
45#include <QtQml/QJSValue>
46
47#include <QtQml/qqmlscriptstring.h>
48#include <QtQml/qqmlparserstatus.h>
49#include <private/qqmlcustomparser_p.h>
50#include <private/qqmlboundsignalexpressionpointer_p.h>
51
52QT_BEGIN_NAMESPACE
53
54class SignalTransition : public QSignalTransition, public QQmlParserStatus
55{
56 Q_OBJECT
57 Q_INTERFACES(QQmlParserStatus)
58 Q_PROPERTY(QJSValue signal READ signal WRITE setSignal NOTIFY qmlSignalChanged)
59 Q_PROPERTY(QQmlScriptString guard READ guard WRITE setGuard NOTIFY guardChanged)
60 QML_ELEMENT
61
62public:
63 explicit SignalTransition(QState *parent = nullptr);
64
65 QQmlScriptString guard() const;
66 void setGuard(const QQmlScriptString &guard);
67
68 bool eventTest(QEvent *event) override;
69 void onTransition(QEvent *event) override;
70
71 const QJSValue &signal();
72 void setSignal(const QJSValue &signal);
73
74 Q_INVOKABLE void invoke();
75
76Q_SIGNALS:
77 void guardChanged();
78 void invokeYourself();
79 /*!
80 * \internal
81 */
82 void qmlSignalChanged();
83
84private:
85 void classBegin() override { m_complete = false; }
86 void componentComplete() override { m_complete = true; connectTriggered(); }
87 void connectTriggered();
88
89 friend class SignalTransitionParser;
90 QJSValue m_signal;
91 QQmlScriptString m_guard;
92 bool m_complete;
93 QQmlRefPointer<QV4::ExecutableCompilationUnit> m_compilationUnit;
94 QList<const QV4::CompiledData::Binding *> m_bindings;
95 QQmlBoundSignalExpressionPointer m_signalExpression;
96};
97
98class SignalTransitionParser : public QQmlCustomParser
99{
100public:
101 void verifyBindings(const QQmlRefPointer<QV4::ExecutableCompilationUnit> &compilationUnit, const QList<const QV4::CompiledData::Binding *> &props) override;
102 void applyBindings(QObject *object, const QQmlRefPointer<QV4::ExecutableCompilationUnit> &compilationUnit, const QList<const QV4::CompiledData::Binding *> &bindings) override;
103};
104
105template<>
106inline QQmlCustomParser *qmlCreateCustomParser<SignalTransition>()
107{
108 return new SignalTransitionParser;
109}
110
111QT_END_NAMESPACE
112
113#endif
114

source code of qtdeclarative/src/imports/statemachine/signaltransition.h