QQmlScriptString Class
The QQmlScriptString class encapsulates a script and its context. More...
| Header: | #include <QQmlScriptString> |
| qmake: | QT += qml |
Public Functions
| QQmlScriptString() | |
| QQmlScriptString(const QQmlScriptString & other) | |
| bool | booleanLiteral(bool * ok) const |
| bool | isEmpty() const |
| bool | isNullLiteral() const |
| bool | isUndefinedLiteral() const |
| qreal | numberLiteral(bool * ok) const |
| QString | stringLiteral() const |
| bool | operator!=(const QQmlScriptString & other) const |
| QQmlScriptString & | operator=(const QQmlScriptString & other) |
| bool | operator==(const QQmlScriptString & other) const |
Detailed Description
The QQmlScriptString class encapsulates a script and its context.
QQmlScriptString is used to create QObject properties that accept a script "assignment" from QML.
Normally, the following QML would result in a binding being established for the script property; i.e. script would be assigned the value obtained from running myObj.value = Math.max(myValue, 100)
MyType { script: myObj.value = Math.max(myValue, 100) }
If instead the property had a type of QQmlScriptString, the script itself -- myObj.value = Math.max(myValue, 100) -- would be passed to the script property and the class could choose how to handle it. Typically, the class will evaluate the script at some later time using a QQmlExpression.
QQmlExpression expr(scriptString); expr.evaluate();
See also QQmlExpression.
Member Function Documentation
QQmlScriptString::QQmlScriptString()
Constructs an empty instance.
QQmlScriptString::QQmlScriptString(const QQmlScriptString & other)
Copies other.
bool QQmlScriptString::booleanLiteral(bool * ok) const
If the content of the QQmlScriptString is a boolean literal, returns the boolean value and sets ok to true. Otherwise returns false and sets ok to false.
bool QQmlScriptString::isEmpty() const
Returns whether the QQmlScriptString is empty.
bool QQmlScriptString::isNullLiteral() const
Returns whether the content of the QQmlScriptString is the null literal.
bool QQmlScriptString::isUndefinedLiteral() const
Returns whether the content of the QQmlScriptString is the undefined literal.
qreal QQmlScriptString::numberLiteral(bool * ok) const
If the content of the QQmlScriptString is a number literal, returns that number and sets ok to true. Otherwise returns 0.0 and sets ok to false.
QString QQmlScriptString::stringLiteral() const
If the content of the QQmlScriptString is a string literal, returns that string. Otherwise returns a null QString.
bool QQmlScriptString::operator!=(const QQmlScriptString & other) const
Returns true if this and the other QQmlScriptString objects are different.
See also operator==().
QQmlScriptString & QQmlScriptString::operator=(const QQmlScriptString & other)
Assigns other to this.
bool QQmlScriptString::operator==(const QQmlScriptString & other) const
Returns true if this and the other QQmlScriptString objects are equal.
See also operator!=().
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