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https://github.com/qgis/QGIS.git
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260 lines
9.2 KiB
Python
260 lines
9.2 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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FieldsMappingWidget.py
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---------------------
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Date : October 2014
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Copyright : (C) 2014 by Arnaud Morvan
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Email : arnaud dot morvan at camptocamp dot com
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***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************
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"""
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__author__ = 'Arnaud Morvan'
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__date__ = 'October 2014'
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__copyright__ = '(C) 2014, Arnaud Morvan'
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import os
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from qgis.PyQt import uic
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from qgis.PyQt.QtCore import (
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QItemSelectionModel,
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QModelIndex,
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pyqtSlot,
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QCoreApplication,
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QVariant,
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)
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from qgis.PyQt.QtWidgets import (
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QComboBox,
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QSpacerItem,
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QMessageBox,
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QWidget,
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QVBoxLayout
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)
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from qgis.core import (
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QgsApplication,
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QgsMapLayerProxyModel,
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QgsProcessingFeatureSourceDefinition,
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QgsProcessingUtils,
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QgsVectorLayer,
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QgsField,
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QgsFields,
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)
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from processing.gui.wrappers import WidgetWrapper, DIALOG_STANDARD, DIALOG_MODELER
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from processing.tools import dataobjects
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from processing.algs.qgis.FieldsMapper import FieldsMapper
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pluginPath = os.path.dirname(__file__)
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WIDGET, BASE = uic.loadUiType(
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os.path.join(pluginPath, 'fieldsmappingpanelbase.ui'))
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class FieldsMappingPanel(BASE, WIDGET):
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def __init__(self, parent=None):
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super(FieldsMappingPanel, self).__init__(parent)
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self.setupUi(self)
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self.addButton.setIcon(QgsApplication.getThemeIcon("/mActionNewAttribute.svg"))
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self.deleteButton.setIcon(QgsApplication.getThemeIcon('/mActionDeleteAttribute.svg'))
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self.upButton.setIcon(QgsApplication.getThemeIcon('/mActionArrowUp.svg'))
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self.downButton.setIcon(QgsApplication.getThemeIcon('/mActionArrowDown.svg'))
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self.resetButton.setIcon(QgsApplication.getThemeIcon('/mIconClearText.svg'))
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self.configure()
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self.layerCombo.setAllowEmptyLayer(True)
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self.layerCombo.setFilters(QgsMapLayerProxyModel.VectorLayer)
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self.dialogType = None
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self.layer = None
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def configure(self):
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self.model = self.fieldsView.model()
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self.fieldsView.setDestinationEditable(True)
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def setLayer(self, layer):
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if layer is None or self.layer == layer:
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return
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self.layer = layer
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if self.model.rowCount(QModelIndex()) == 0:
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self.on_resetButton_clicked()
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return
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dlg = QMessageBox(self)
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dlg.setText(self.tr("Do you want to reset the field mapping?"))
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dlg.setStandardButtons(
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QMessageBox.StandardButtons(QMessageBox.Yes |
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QMessageBox.No))
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dlg.setDefaultButton(QMessageBox.No)
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if dlg.exec_() == QMessageBox.Yes:
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self.on_resetButton_clicked()
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def value(self):
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# Value is a dict with name, type, length, precision and expression
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mapping = self.fieldsView.mapping()
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results = []
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for f in mapping:
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results.append({
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'name': f.field.name(),
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'type': f.field.type(),
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'length': f.field.length(),
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'precision': f.field.precision(),
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'expression': f.expression,
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})
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return results
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def setValue(self, value):
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if type(value) != dict:
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return
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destinationFields = QgsFields()
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expressions = {}
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for field_def in value:
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f = QgsField(field_def.get('name'),
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field_def.get('type', QVariant.Invalid),
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field_def.get(QVariant.typeToName(field_def.get('type', QVariant.Invalid))),
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field_def.get('length', 0),
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field_def.get('precision', 0))
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try:
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expressions[f.name()] = field_def['expressions']
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except AttributeError:
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pass
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destinationFields.append(f)
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if len(destinationFields):
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self.fieldsView.setDestinationFields(destinationFields, expressions)
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@pyqtSlot(bool, name='on_addButton_clicked')
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def on_addButton_clicked(self, checked=False):
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rowCount = self.model.rowCount(QModelIndex())
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self.model.appendField(QgsField('new_field'))
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index = self.model.index(rowCount, 0)
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self.fieldsView.selectionModel().select(
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index,
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QItemSelectionModel.SelectionFlags(
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QItemSelectionModel.Clear |
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QItemSelectionModel.Select |
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QItemSelectionModel.Current |
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QItemSelectionModel.Rows))
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self.fieldsView.scrollTo(index)
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@pyqtSlot(bool, name='on_deleteButton_clicked')
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def on_deleteButton_clicked(self, checked=False):
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self.fieldsView.removeSelectedFields()
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@pyqtSlot(bool, name='on_upButton_clicked')
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def on_upButton_clicked(self, checked=False):
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self.fieldsView.moveSelectedFieldsUp()
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@pyqtSlot(bool, name='on_downButton_clicked')
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def on_downButton_clicked(self, checked=False):
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self.fieldsView.moveSelectedFieldsDown()
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@pyqtSlot(bool, name='on_resetButton_clicked')
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def on_resetButton_clicked(self, checked=False):
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"""Load fields from layer"""
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if self.layer:
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self.fieldsView.setSourceFields(self.layer.fields())
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self.fieldsView.setDestinationFields(self.layer.fields())
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@pyqtSlot(bool, name='on_loadLayerFieldsButton_clicked')
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def on_loadLayerFieldsButton_clicked(self, checked=False):
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layer = self.layerCombo.currentLayer()
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if layer is None:
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return
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self.fieldsView.setSourceFields(layer.fields())
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self.fieldsView.setDestinationFields(layer.fields())
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class FieldsMappingWidgetWrapper(WidgetWrapper):
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def __init__(self, *args, **kwargs):
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super(FieldsMappingWidgetWrapper, self).__init__(*args, **kwargs)
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self._layer = None
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def createPanel(self):
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return FieldsMappingPanel()
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def createWidget(self):
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self.panel = self.createPanel()
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self.panel.dialogType = self.dialogType
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if self.dialogType == DIALOG_MODELER:
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self.combobox = QComboBox()
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self.combobox.addItem(QCoreApplication.translate('Processing', '[Preconfigure]'), None)
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fieldsMappingInputs = self.dialog.getAvailableValuesOfType(FieldsMapper.ParameterFieldsMapping)
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for input in fieldsMappingInputs:
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self.combobox.addItem(self.dialog.resolveValueDescription(input), input)
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def updatePanelEnabledState():
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if self.combobox.currentData() is None:
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self.panel.setEnabled(True)
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else:
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self.panel.setEnabled(False)
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self.combobox.currentIndexChanged.connect(updatePanelEnabledState)
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widget = QWidget()
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widget.setLayout(QVBoxLayout())
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widget.layout().addWidget(self.combobox)
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widget.layout().addWidget(self.panel)
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return widget
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else:
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return self.panel
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def postInitialize(self, wrappers):
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for wrapper in wrappers:
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if wrapper.parameterDefinition().name() == self.parameterDefinition().parentLayerParameter():
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if wrapper.parameterValue():
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self.setLayer(wrapper.parameterValue())
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wrapper.widgetValueHasChanged.connect(self.parentLayerChanged)
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break
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# remove exiting spacers to get FieldsMappingPanel fully expanded
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if self.dialogType in (DIALOG_STANDARD, DIALOG_MODELER):
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layout = self.widget.parent().layout()
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spacer = layout.itemAt(layout.count() - 1)
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if isinstance(spacer, QSpacerItem):
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layout.removeItem(spacer)
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def parentLayerChanged(self, layer=None):
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self.setLayer(self.sender().widgetValue())
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def setLayer(self, layer):
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context = dataobjects.createContext()
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if layer == self._layer:
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return
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if isinstance(layer, QgsProcessingFeatureSourceDefinition):
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layer, ok = layer.source.valueAsString(context.expressionContext())
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if isinstance(layer, str):
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layer = QgsProcessingUtils.mapLayerFromString(layer, context)
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if not isinstance(layer, QgsVectorLayer):
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layer = None
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self._layer = layer
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self.panel.setLayer(self._layer)
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def linkedVectorLayer(self):
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return self._layer
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def setValue(self, value):
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self.panel.setValue(value)
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def value(self):
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if self.dialogType == DIALOG_MODELER:
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if self.combobox.currentData() is None:
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return self.panel.value()
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else:
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return self.comboValue(combobox=self.combobox)
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else:
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return self.panel.value()
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