def test_on_update(self):
"""Test live update"""
layer = QgsVectorLayer("Point?field=age:int", "vl", "memory")
# set default value for numbers to [1, {age}], it will depend on the field age and should update
field = QgsField('numbers', QVariant.List, 'array')
field.setEditorWidgetSetup(QgsEditorWidgetSetup('List', {}))
layer.dataProvider().addAttributes([field])
layer.updateFields()
layer.setDefaultValueDefinition(1,
QgsDefaultValue('array(1, age)', True))
layer.setEditorWidgetSetup(1, QgsEditorWidgetSetup('List', {}))
layer.startEditing()
form = QgsAttributeForm(layer)
feature = QgsFeature(layer.fields())
form.setFeature(feature)
form.setMode(QgsAttributeEditorContext.AddFeatureMode)
form.changeAttribute('numbers', [12])
form.changeAttribute('age', 1)
self.assertEqual(form.currentFormFeature()['numbers'], [1, 1])
form.changeAttribute('age', 7)
self.assertEqual(form.currentFormFeature()['numbers'], [1, 7])
class AttributesDock(QgsDockWidget):
layerChanged = pyqtSignal(QgsMapLayer)
currentValueChanged = pyqtSignal(str, QVariant)
def __init__(self, iface):
QgsDockWidget.__init__(
self,
QCoreApplication.translate('AttributesDock', 'Quick Attribution'))
self.iface = iface
self.widget = QWidget()
self.widget.setLayout(QGridLayout())
self.widget.setContentsMargins(0, 0, 0, 0)
self.layerComboBox = QgsMapLayerComboBox()
self.layerComboBox.layerChanged.connect(self.setLayer)
self.layerComboBox.setSizePolicy(QSizePolicy.Expanding,
QSizePolicy.Fixed)
self.layerTitleLabel = QLabel()
self.widget.layout().addWidget(self.layerTitleLabel, 0, 0, 1, 1)
self.widget.layout().addWidget(self.layerComboBox, 0, 1, 1, 1)
self.formWidget = QWidget()
self.formWidget.setLayout(QGridLayout())
self.formWidget.setContentsMargins(0, 0, 0, 0)
self.widget.layout().addWidget(self.formWidget, 1, 0, 1, 2)
self.setWidget(self.widget)
self.attributeForm = None
self.layer = None
self.feature = None
self.layerComboBox.setFilters(QgsMapLayerProxyModel.WritableLayer
| QgsMapLayerProxyModel.VectorLayer)
QgsProject.instance().readProject.connect(self.onProjectRead)
def setLayer(self, layer):
if layer == self.layer:
return
if self.layer:
try:
self.layer.destroyed.disconnect(self.onLayerRemoved)
except TypeError:
# Do not care if it is not connected
pass
self.layer = layer
if self.layer:
self.layer.destroyed.connect(self.onLayerRemoved)
self.layerComboBox.setLayer(layer)
if self.attributeForm:
try:
self.attributeForm.deleteLater()
except RuntimeError:
# Sometimes the form has already been deleted, that's ok for us
pass
if self.layer is not None:
context = QgsAttributeEditorContext()
context.setVectorLayerTools(self.iface.vectorLayerTools())
context.setFormMode(QgsAttributeEditorContext.StandaloneDialog)
self.attributeForm = QgsAttributeForm(self.layer, QgsFeature(),
context)
self.attributeForm.hideButtonBox()
try:
self.layer.updatedFields.disconnect(
self.attributeForm.onUpdatedFields)
except TypeError:
pass
fields = self.layer.fields()
self.feature = QgsFeature(fields)
for idx in range(self.layer.fields().count()):
self.feature.setAttribute(idx, self.layer.defaultValue(idx))
self.feature.setValid(True)
self.attributeForm.setFeature(self.feature)
self.attributeForm.widgetValueChanged.connect(
self.onAttributeChanged)
self.formWidget.layout().addWidget(self.attributeForm)
self.layerChanged.emit(self.layer)
def onLayerRemoved(self):
self.setLayer(None)
def onAttributeChanged(self, attributeName, value, changed):
idx = self.layer.fields().indexOf(attributeName)
if value != 'NULL':
defaultValue = QgsExpression.quotedValue(value)
else:
defaultValue = 'NULL'
self.layer.blockSignals(True)
self.layer.setDefaultValueDefinition(idx,
QgsDefaultValue(defaultValue))
self.layer.blockSignals(False)
self.currentValueChanged.emit(attributeName, value)
def onProjectRead(self, doc):
title, isDefined = QgsProject.instance().readEntry(
'quick_attribution', 'layercbxtitle')
if isDefined:
self.layerTitleLabel.setText(title)
else:
self.layerTitleLabel.setText(self.tr('Layer'))
