本文整理汇总了Python中qgis.gui.QgsFieldExpressionWidget.appendScope方法的典型用法代码示例。如果您正苦于以下问题：Python QgsFieldExpressionWidget.appendScope方法的具体用法？Python QgsFieldExpressionWidget.appendScope怎么用？Python QgsFieldExpressionWidget.appendScope使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类qgis.gui.QgsFieldExpressionWidget的用法示例。
在下文中一共展示了QgsFieldExpressionWidget.appendScope方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: ExecuteSQLWidget
# 需要导入模块: from qgis.gui import QgsFieldExpressionWidget [as 别名]
# 或者: from qgis.gui.QgsFieldExpressionWidget import appendScope [as 别名]
class ExecuteSQLWidget(BASE, WIDGET):
def __init__(self, dialog):
super(ExecuteSQLWidget, self).__init__(None)
self.setupUi(self)
self.dialog = dialog
self.dialogType = dialogTypes[dialog.__class__.__name__]
self.mExpressionWidget = QgsFieldExpressionWidget()
# add model parameters in context scope if called from modeler
if self.dialogType == DIALOG_MODELER:
strings = dialog.getAvailableValuesOfType(
[QgsProcessingParameterString, QgsProcessingParameterNumber], [])
model_params = [dialog.resolveValueDescription(s) for s in strings]
scope = QgsExpressionContextScope()
for param in model_params:
var = QgsExpressionContextScope.StaticVariable(param)
scope.addVariable(var)
self.mExpressionWidget.appendScope(scope)
self.mHLayout.insertWidget(0, self.mExpressionWidget)
self.mInsert.clicked.connect(self.insert)
def insert(self):
if self.mExpressionWidget.currentText():
exp = '[%{}%]'.format(self.mExpressionWidget.currentText())
self.mText.insertPlainText(exp)
def setValue(self, value):
text = value
if self.dialogType == DIALOG_MODELER:
if isinstance(value, list):
for v in value:
if isinstance(v, QgsProcessingModelChildParameterSource) \
and v.source() == QgsProcessingModelChildParameterSource.ExpressionText:
text = v.expressionText()
# replace parameter's name by expression (diverging after model save)
names = QgsExpression.referencedVariables(text)
strings = self.dialog.getAvailableValuesOfType(
[QgsProcessingParameterString, QgsProcessingParameterNumber], [])
model_params = [(self.dialog.resolveValueDescription(s), s) for s in strings]
for k, v in model_params:
if v.parameterName() in names:
text = text.replace('[% @{} %]'.format(v.parameterName()), '[% @{} %]'.format(k))
self.mText.setPlainText(text)
def value(self):
value = self.mText.toPlainText()
if self.dialogType == DIALOG_MODELER:
expression_values = self._expressionValues(value)
if len(expression_values) > 1:
value = expression_values
return value
def _expressionValues(self, text):
strings = self.dialog.getAvailableValuesOfType(
[QgsProcessingParameterString, QgsProcessingParameterNumber], [])
model_params = [(self.dialog.resolveValueDescription(s), s) for s in strings]
variables = QgsExpression.referencedVariables(text)
# replace description by parameter's name (diverging after model save)
descriptions = QgsExpression.referencedVariables(text)
for k, v in model_params:
if k in descriptions:
text = text.replace('[% @{} %]'.format(k), '[% @{} %]'.format(v.parameterName()))
src = QgsProcessingModelChildParameterSource.fromExpressionText(text)
# add parameters currently used by the expression
expression_values = []
expression_values.append(src)
for k, v in model_params:
if k in variables:
expression_values.append(v)
return expression_values