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39 | |
40 | #ifndef QQMLEXPRESSION_H |
41 | #define QQMLEXPRESSION_H |
42 | |
43 | #include <QtQml/qqmlerror.h> |
44 | #include <QtQml/qqmlscriptstring.h> |
45 | |
46 | #include <QtCore/qobject.h> |
47 | #include <QtCore/qvariant.h> |
48 | |
49 | QT_BEGIN_NAMESPACE |
50 | |
51 | |
52 | class QString; |
53 | class QQmlRefCount; |
54 | class QQmlEngine; |
55 | class QQmlContext; |
56 | class QQmlExpressionPrivate; |
57 | class QQmlContextData; |
58 | class Q_QML_EXPORT QQmlExpression : public QObject |
59 | { |
60 | Q_OBJECT |
61 | public: |
62 | QQmlExpression(); |
63 | QQmlExpression(QQmlContext *, QObject *, const QString &, QObject * = nullptr); |
64 | explicit QQmlExpression(const QQmlScriptString &, QQmlContext * = nullptr, QObject * = nullptr, QObject * = nullptr); |
65 | ~QQmlExpression() override; |
66 | |
67 | QQmlEngine *engine() const; |
68 | QQmlContext *context() const; |
69 | |
70 | QString expression() const; |
71 | void setExpression(const QString &); |
72 | |
73 | bool notifyOnValueChanged() const; |
74 | void setNotifyOnValueChanged(bool); |
75 | |
76 | QString sourceFile() const; |
77 | int lineNumber() const; |
78 | int columnNumber() const; |
79 | void setSourceLocation(const QString &fileName, int line, int column = 0); |
80 | |
81 | QObject *scopeObject() const; |
82 | |
83 | bool hasError() const; |
84 | void clearError(); |
85 | QQmlError error() const; |
86 | |
87 | QVariant evaluate(bool *valueIsUndefined = nullptr); |
88 | |
89 | Q_SIGNALS: |
90 | void valueChanged(); |
91 | |
92 | private: |
93 | QQmlExpression(QQmlContextData *, QObject *, const QString &); |
94 | |
95 | Q_DISABLE_COPY(QQmlExpression) |
96 | Q_DECLARE_PRIVATE(QQmlExpression) |
97 | friend class QQmlDebugger; |
98 | friend class QQmlContext; |
99 | }; |
100 | |
101 | QT_END_NAMESPACE |
102 | |
103 | #endif // QQMLEXPRESSION_H |
104 | |
105 | |