Python QgsExpressionContext.setHighlightedVariables Examples

Example #1

File: FieldsCalculatorDialog.py Project: Jesonchang12/QGIS

    def updateLayer(self):
        self.layer = dataobjects.getObject(self.cmbInputLayer.currentText())

        self.builder.setLayer(self.layer)
        self.builder.loadFieldNames()

        exp_context = QgsExpressionContext()
        exp_context.appendScope(QgsExpressionContextUtils.globalScope())
        exp_context.appendScope(QgsExpressionContextUtils.projectScope())
        exp_context.appendScope(QgsExpressionContextUtils.layerScope(self.layer))
        exp_context.lastScope().setVariable("row_number", 1)
        exp_context.setHighlightedVariables(["row_number"])
        self.builder.setExpressionContext(exp_context)

        self.populateFields()

Example #2

File: FieldsCalculatorDialog.py Project: ljx0305/QGIS

    def updateLayer(self):
        self.layer = dataobjects.getObject(self.cmbInputLayer.currentText())

        self.builder.setLayer(self.layer)
        self.builder.loadFieldNames()

        exp_context = QgsExpressionContext()
        exp_context.appendScope(QgsExpressionContextUtils.globalScope())
        exp_context.appendScope(QgsExpressionContextUtils.projectScope())
        exp_context.appendScope(
            QgsExpressionContextUtils.layerScope(self.layer))
        exp_context.lastScope().setVariable("row_number", 1)
        exp_context.setHighlightedVariables(["row_number"])
        self.builder.setExpressionContext(exp_context)

        self.populateFields()