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50 lines
1.9 KiB
Plaintext
50 lines
1.9 KiB
Plaintext
/************************************************************************
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* This file has been generated automatically from *
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* *
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* src/core/qgsexpressioncontextgenerator.h *
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* *
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* Do not edit manually ! Edit header and run scripts/sipify.pl again *
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************************************************************************/
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class QgsExpressionContextGenerator
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{
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%Docstring
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Abstract interface for generating an expression context.
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You need to implement this interface in a class and register this class with
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:py:func:`QgsFieldExpressionWidget.registerExpressionGenerator()`
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This is used for example in QgsPropertyOverrideButton or QgsFieldExpressionWidget
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classes which will ask for a new QgsExpressionContext every time the expression
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editor is opened. This way they are able to provide an up-to-date expression
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editor even when the environment changes.
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.. versionadded:: 3.0
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%End
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%TypeHeaderCode
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#include "qgsexpressioncontextgenerator.h"
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%End
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public:
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virtual QgsExpressionContext createExpressionContext() const = 0;
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%Docstring
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This method needs to be reimplemented in all classes which implement this interface
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and return an expression context.
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.. versionadded:: 3.0
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%End
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virtual ~QgsExpressionContextGenerator();
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};
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/************************************************************************
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* This file has been generated automatically from *
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* *
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* src/core/qgsexpressioncontextgenerator.h *
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* *
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* Do not edit manually ! Edit header and run scripts/sipify.pl again *
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************************************************************************/
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