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ExecuteSQLWidget.py
144 lines (104 loc) · 5.29 KB
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ExecuteSQLWidget.py
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# -*- coding: utf-8 -*-
"""
***************************************************************************
ExecuteSQLWidget.py
---------------------
Date : November 2017
Copyright : (C) 2017 by Paul Blottiere
Email : blottiere dot paul at gmail dot com
***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************
"""
__author__ = 'Paul Blottiere'
__date__ = 'November 2018'
__copyright__ = '(C) 2018, Paul Blottiere'
import os
from qgis.PyQt import uic
from qgis.core import (QgsExpressionContextScope,
QgsProcessingParameterString,
QgsProcessingParameterNumber,
QgsExpression,
QgsProcessingModelChildParameterSource)
from qgis.gui import QgsFieldExpressionWidget
from processing.gui.wrappers import (WidgetWrapper,
dialogTypes,
DIALOG_MODELER)
pluginPath = os.path.dirname(__file__)
WIDGET, BASE = uic.loadUiType(os.path.join(pluginPath, 'ExecuteSQLWidgetBase.ui'))
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 = [src]
for k, v in model_params:
if k in variables:
expression_values.append(v)
return expression_values
class ExecuteSQLWidgetWrapper(WidgetWrapper):
def createWidget(self):
return ExecuteSQLWidget(self.dialog)
def setValue(self, value):
self.widget.setValue(value)
def value(self):
return self.widget.value()