def doAction(self, layer, uid, feature):
if layer.actions().action(uid).name() == 'openFeatureForm':
self.plugin.iface.openFeatureForm(layer, feature)
else :
ctxt = QgsExpressionContext()
ctxt.appendScope(QgsExpressionContextUtils.globalScope())
ctxt.appendScope(QgsExpressionContextUtils.projectScope(QgsProject.instance()))
ctxt.appendScope(QgsExpressionContextUtils.mapSettingsScope(self.canvas.mapSettings()))
# Add click_x and click_y to context
p = self.toLayerCoordinates(layer, self.pos())
QgsExpressionContextUtils.setProjectVariable(QgsProject.instance(), 'click_x', p.x())
QgsExpressionContextUtils.setProjectVariable(QgsProject.instance(), 'click_y', p.y())
layer.actions().doAction(uid, feature, ctxt)
def createExpressionContext():
context = QgsExpressionContext()
context.appendScope(QgsExpressionContextUtils.globalScope())
context.appendScope(QgsExpressionContextUtils.projectScope(QgsProject.instance()))
if iface.mapCanvas():
context.appendScope(QgsExpressionContextUtils.mapSettingsScope(iface.mapCanvas().mapSettings()))
processingScope = QgsExpressionContextScope()
extent = iface.mapCanvas().fullExtent()
processingScope.setVariable('fullextent_minx', extent.xMinimum())
processingScope.setVariable('fullextent_miny', extent.yMinimum())
processingScope.setVariable('fullextent_maxx', extent.xMaximum())
processingScope.setVariable('fullextent_maxy', extent.yMaximum())
context.appendScope(processingScope)
return context
def _layer_tooltip(self, layer, feat):
try:
df = layer.displayField()
if df:
return str(feat.attribute(df))
else:
context = QgsExpressionContext()
context.appendScope(QgsExpressionContextUtils.globalScope())
context.appendScope(QgsExpressionContextUtils.projectScope(QgsProject.instance()))
context.appendScope(QgsExpressionContextUtils.layerScope(layer))
context.appendScope(QgsExpressionContextUtils.mapSettingsScope( self.canvas.mapSettings() ) )
context.setFeature( feat )
x = QgsExpression(layer.displayExpression())
x.prepare(context)
return x.evaluate(context).replace('\n', "<br/>")
except:
return ""
def pointPicked(self, event):
for b in self.rubberBands:
del b
self.rubberBands[:] = []
fieldX = self.cmbXField.currentField()
fieldY = self.cmbYField.currentField()
artist = event.artist
indices = event.ind
for i in indices:
x = self.xData[artist.name][i]
y = self.yData[artist.name][i]
if isinstance(x, int):
expr = '"{}" = {} AND '.format(fieldX, x)
elif isinstance(x, float):
expr = 'abs("{}" - {}) <= 0.0000001 AND '.format(fieldX, x)
elif isinstance(x, (str, unicode)):
expr = """"{}" = '{}' AND """.format(fieldX, x)
else:
expr = """"{}" = '{}' AND """.format(fieldX, x.toString('yyyy-MM-dd'))
if isinstance(y, float):
expr += 'abs("{}" - {}) <= 0.0000001'.format(fieldY, y)
elif isinstance(y, (str, unicode)):
expr += """"{}" = '{}'""".format(fieldY, y)
else:
expr += '"{}" = {}'.format(fieldY, y)
layer = self.cmbLayer.currentLayer()
expression = QgsExpression(expr)
context = QgsExpressionContext()
context.appendScope(QgsExpressionContextUtils.globalScope())
context.appendScope(QgsExpressionContextUtils.projectScope())
context.appendScope(QgsExpressionContextUtils.mapSettingsScope(self.canvas.mapSettings()))
context.appendScope(QgsExpressionContextUtils.layerScope(layer))
request = QgsFeatureRequest(expression, context)
for f in layer.getFeatures(request):
hl = QgsHighlight(self.canvas, f.geometry(), layer)
hl.setColor(QColor(255, 0, 0))
hl.setWidth(2)
self.rubberBands.append(hl)
def createExpressionContext():
context = QgsExpressionContext()
context.appendScope(QgsExpressionContextUtils.globalScope())
context.appendScope(
QgsExpressionContextUtils.projectScope(QgsProject.instance()))
if iface and iface.mapCanvas():
context.appendScope(
QgsExpressionContextUtils.mapSettingsScope(
iface.mapCanvas().mapSettings()))
processingScope = QgsExpressionContextScope()
if iface and iface.mapCanvas():
extent = iface.mapCanvas().fullExtent()
processingScope.setVariable('fullextent_minx', extent.xMinimum())
processingScope.setVariable('fullextent_miny', extent.yMinimum())
processingScope.setVariable('fullextent_maxx', extent.xMaximum())
processingScope.setVariable('fullextent_maxy', extent.yMaximum())
context.appendScope(processingScope)
return context
def _layer_tooltip(self, layer, feat):
try:
df = layer.displayField()
if df:
return str(feat.attribute(df))
else:
context = QgsExpressionContext()
context.appendScope(QgsExpressionContextUtils.globalScope())
context.appendScope(
QgsExpressionContextUtils.projectScope(
QgsProject.instance()))
context.appendScope(
QgsExpressionContextUtils.layerScope(layer))
context.appendScope(
QgsExpressionContextUtils.mapSettingsScope(
self.canvas.mapSettings()))
context.setFeature(feat)
x = QgsExpression(layer.displayExpression())
x.prepare(context)
return x.evaluate(context).replace("\n", "<br/>")
except:
return ""
# coding: utf-8
from qgis.core import QgsExpressionContextUtils, QgsExpressionContext
from qgis.gui import QgsVariableEditorWidget
from qgis.utils import iface
canvas = iface.mapCanvas()
variable_editor_widget = QgsVariableEditorWidget()
expression_context = QgsExpressionContext()
expression_context.appendScope(QgsExpressionContextUtils.globalScope())
expression_context.appendScope(QgsExpressionContextUtils.projectScope())
expression_context.appendScope(QgsExpressionContextUtils.mapSettingsScope(
canvas.mapSettings()
))
variable_editor_widget.setContext(expression_context)
variable_editor_widget.reloadContext()
variable_editor_widget.setEditableScopeIndex(0)
print(variable_editor_widget.context())
print(variable_editor_widget.editableScope())
print(variable_editor_widget.settingGroup())
print(variable_editor_widget.variablesInActiveScope())
variable_editor_widget.show()
# coding: utf-8
from qgis.core import QgsExpressionContextUtils, QgsExpressionContext
from qgis.gui import QgsVariableEditorWidget
from qgis.utils import iface
canvas = iface.mapCanvas()
variable_editor_widget = QgsVariableEditorWidget()
expression_context = QgsExpressionContext()
expression_context.appendScope(QgsExpressionContextUtils.globalScope())
expression_context.appendScope(QgsExpressionContextUtils.projectScope())
expression_context.appendScope(
QgsExpressionContextUtils.mapSettingsScope(canvas.mapSettings()))
variable_editor_widget.setContext(expression_context)
variable_editor_widget.reloadContext()
variable_editor_widget.setEditableScopeIndex(0)
print(variable_editor_widget.context())
print(variable_editor_widget.editableScope())
print(variable_editor_widget.settingGroup())
print(variable_editor_widget.variablesInActiveScope())
variable_editor_widget.show()
