The label Webmap expression expects to hold a legal, Webmap script and to be read and evaluated by a Webmap expression interpreter. An example expression that combines text with a field value is: c {State {State_Name}}. Note that quotes are not needed around the literal text. More...
Public Functions Detailed DescriptionNote: If expression using attributes which don't exist then no label will be produced. This is distinct from the attribute existing but having a null or empty value, which can form part of the produced text label.
Member Function Documentation[explicit] WebmapLabelExpression::WebmapLabelExpression(QObject *parent = nullptr)
Creates a label Webmap expression with an empty expression script.
An empty script is a legal Webmap expression that will evaluate to an empty string.
[explicit] WebmapLabelExpression::WebmapLabelExpression(const QString &webmapExpression, QObject *parent = nullptr)
Creates a label Webmap expression with a specific Webmap script.
The expression is expected to be a complete, self-contained Webmap expression.
[override virtual noexcept] WebmapLabelExpression::~WebmapLabelExpression()
Destructor.
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