def style_categorized(self, layer, style_by):
# get unique values
fni = layer.fieldNameIndex(style_by)
unique_values = layer.dataProvider().uniqueValues(fni)
# define categories
categories = []
for unique_value in unique_values:
# initialize the default symbol for this geometry type
symbol = QgsSymbolV2.defaultSymbol(layer.geometryType())
# configure a symbol layer
layer_style = {}
layer_style['color'] = '%d, %d, %d' % (randrange(
0, 256), randrange(0, 256), randrange(0, 256))
layer_style['outline'] = '#000000'
symbol_layer = QgsSimpleFillSymbolLayerV2.create(layer_style)
# replace default symbol layer with the configured one
if symbol_layer is not None:
symbol.changeSymbolLayer(0, symbol_layer)
# create renderer object
category = QgsRendererCategoryV2(unique_value, symbol,
str(unique_value))
# entry for the list of category items
categories.append(category)
# create renderer object
renderer = QgsCategorizedSymbolRendererV2(style_by, categories)
# assign the created renderer to the layer
if renderer is not None:
layer.setRendererV2(renderer)
layer.triggerRepaint()
self.iface.legendInterface().refreshLayerSymbology(layer)
self.iface.mapCanvas().refresh()
def apply(self, layer):
symbol = QgsSymbolV2.defaultSymbol(layer.geometryType())
symbol_layer = QgsSimpleFillSymbolLayerV2.create({'color': self.color})
if self.border_style:
symbol_layer.setBorderStyle(self.border_style)
self.renderer = QgsSingleSymbolRendererV2(symbol)
self.renderer.symbols()[0].changeSymbolLayer(0, symbol_layer)
super(SimpleFillSymbology, self).apply(layer)
def vector_apply_unique_value_renderer(vector_layer, column):
"""Apply colours to each unique value for a vector layer column.
source: https://gis.stackexchange.com/a/175114
Args:
vector_layer (QgsVectorLayer): A vector layer to apply unique symbology to.
column (str): The column containing the unique values
"""
categories = []
uniq_vals = vector_layer.dataProvider().uniqueValues(
vector_layer.fieldNameIndex(column))
randcolors = random_colours(len(uniq_vals))
for i, ea_value in enumerate(uniq_vals):
# initialize the default symbol for this geometry type
symbol = QgsSymbolV2.defaultSymbol(vector_layer.geometryType())
# configure a symbol layer
layer_style = {
'color': '{}, {}, {}'.format(*randcolors[i]),
'outline': '#000000'
}
symbol_layer = QgsSimpleFillSymbolLayerV2.create(layer_style)
# replace default symbol layer with the configured one
if symbol_layer is not None:
symbol.changeSymbolLayer(0, symbol_layer)
# create renderer object
category = QgsRendererCategoryV2(ea_value, symbol, str(ea_value))
# entry for the list of category items
categories.append(category)
# create renderer object
renderer = QgsCategorizedSymbolRendererV2(column, categories)
# assign the created renderer to the layer
if renderer is not None:
vector_layer.setRendererV2(renderer)
# refresh
vector_layer.triggerRepaint()
def saveParameters(self):
self.updateDistricts()
layers = self.iface.legendInterface().layers()
selectedLayerIndex = self.dlgparameters.cmbActiveLayer.currentIndex()
selectedLayer = layers[selectedLayerIndex]
self.activeLayer = selectedLayer
self.districts = self.dlgparameters.inpDistricts.value()
self.activedistrict = 1
self.dockwidget.lblActiveDistrict.setText("Active District: " +
str(self.activedistrict))
self.dockwidget.sliderDistricts.setMinimum(1)
self.dockwidget.sliderDistricts.setMaximum(self.districts)
self.dockwidget.sliderDistricts.setValue(1)
self.popfield = self.dlgparameters.cmbPopField.currentText()
self.distfield = self.dlgparameters.cmbDistField.currentText()
# self.dispfield1 = self.dlgparameters.cmbDispField1.currentText()
# self.dispfield2 = self.dlgparameters.cmbDispField1.currentText()
QgsMessageLog.logMessage("Popfield:" + str(self.popfield))
self.totalpop = 0
self.targetpop = 0
for feature in self.activeLayer.getFeatures():
self.totalpop = self.totalpop + feature[self.popfield]
self.targetpop = int(self.totalpop / self.districts)
self.targetpoppct = self.dlgparameters.inpTolerance.value()
targetpoprem = int((self.targetpop / 100) * self.targetpoppct)
self.targetpoplower = int(self.targetpop - targetpoprem)
self.targetpophigher = int(self.targetpop + targetpoprem + 1)
QgsMessageLog.logMessage("TargetPop:" + str(self.targetpop) + "(" +
str(self.targetpoplower) + ", " +
str(self.targetpophigher) + ")")
QgsMessageLog.logMessage("Districts:" + str(self.districts))
self.dockwidget.lblMainInfo.setText("Active Layer: " +
self.activeLayer.name() +
"\nActive District Field: " +
self.distfield +
"\nTarget Population: " +
str(self.targetpop) + " (" +
str(self.targetpoplower) + ", " +
str(self.targetpophigher) + ")")
self.attrdockwidget.tblPop.setRowCount(self.districts + 1)
numDataFields = 0
for d in dataFieldList:
numDataFields = numDataFields + 1
self.attrdockwidget.tblPop.setHorizontalHeaderItem(
2 + numDataFields, QTableWidgetItem(d.name))
self.attrdockwidget.tblPop.setColumnCount(4 + numDataFields)
for r in range(0, self.districts + 1):
chkBoxItem = QTableWidgetItem()
chkBoxItem.setFlags(Qt.ItemIsUserCheckable | Qt.ItemIsEnabled)
chkBoxItem.setCheckState(Qt.Unchecked)
self.attrdockwidget.tblPop.setItem(r, 1, chkBoxItem)
self.attrdockwidget.tblPop.setHorizontalHeaderLabels(
['#', 'Lock', 'Population', 'To Target'])
numDataFields = 0
for d in dataFieldList:
numDataFields = numDataFields + 1
if d.type == 1:
self.attrdockwidget.tblPop.setHorizontalHeaderItem(
3 + numDataFields, QTableWidgetItem(d.name))
else:
self.attrdockwidget.tblPop.setHorizontalHeaderItem(
3 + numDataFields, QTableWidgetItem(d.name + '%'))
if len(districtName) == 0:
self.initializeElectorates()
try:
self.saveParametersToFile()
QgsMessageLog.logMessage("Parameters file saved!")
except:
QgsMessageLog.logMessage("Parameters file could not be saved")
if self.dlgparameters.chkStyleMap.isChecked():
categories = []
for cat in range(0, self.districts + 1):
symbol = QgsSymbolV2.defaultSymbol(
self.activeLayer.geometryType())
layer_style = {}
layer_style['color'] = '%d, %d, %d' % (randrange(
0, 256), randrange(0, 256), randrange(0, 256))
layer_style['outline'] = '#000000'
symbol_layer = QgsSimpleFillSymbolLayerV2.create(layer_style)
# replace default symbol layer with the configured one
if symbol_layer is not None:
symbol.changeSymbolLayer(0, symbol_layer)
# create renderer object
category = QgsRendererCategoryV2(cat, symbol, str(cat))
# entry for the list of category items
categories.append(category)
renderer = QgsCategorizedSymbolRendererV2(self.distfield,
categories)
# assign the created renderer to the layer
if renderer is not None:
self.activeLayer.setRendererV2(renderer)
self.activeLayer.triggerRepaint()
self.updateFieldValues()
self.updateTable()
self.updateLockedFields()
self.updateDistricts()
def __getQgsPolygonSymbolLayer(self, msstyle):
props = {}
type_marker = ''
symbol = msstyle.get('symbol', False)
if symbol:
(type_marker, symbolname, msSymbol,
props) = self.__getMsSymbol(symbol, props, True)
opacity = self.__getMsOpacity(msstyle)
color = self.__getMsColor(msstyle, props, opacity)
self.__getMsOutlinecolor(msstyle, props, opacity)
self.__getMsLinecap(msstyle, props)
self.__getMsLinejoin(msstyle, props)
self.__getMsPattern(msstyle, props)
self.__getMsWidth(msstyle, props)
self.__getMsOutline(msstyle, props)
self.__getMsScale(msstyle, props)
offset = self.__getMsOffset(msstyle, props)
if not type_marker:
#-linea sencilla exterior-#
#-relleno simple (sin estilo de relleno preconfigurados)-#
if not color:
self.deleteProperties(props, _qgis.SIMPLE_LINE_SYMBOL_LAYER)
qgsSymbol = QgsSimpleLineSymbolLayerV2.create(props)
else:
self.deleteProperties(props, _qgis.SIMPLE_FILL_SYMBOL_LAYER)
qgsSymbol = QgsSimpleFillSymbolLayerV2.create(props)
#-relleno de gradientes-#
#el gradiente es para renderer por categorias continuas
#no aplica, porque aca es para gradiente de un simbolo
else:
props_parent = {}
self.__setMsOffsetXY(offset, props)
self.__getMsAngle(msstyle, props, props_parent)
gap = self.__getMsGap(msstyle)
size = self.__getMsSize(msstyle, props)
self.__getMarkerDisplacementAndRotate(msstyle, gap, size,
props_parent)
geomtransform = msstyle.get('geomtransform', '').lower()
if geomtransform == 'centroid':
#-relleno de centroides-#
self.__getMsAnchorpoint(msSymbol, props)
qgsSubSymbol = self.__getQgsMarkerSubSymbol(
type_marker, msSymbol, size, props)
#self.deleteProperties(props_parent, _qgis.CENTROID_FILL_SYMBOL_LAYER)
qgsSymbol = QgsCentroidFillSymbolLayerV2.create({})
qgsSymbol.setSubSymbol(qgsSubSymbol)
elif not color:
#-Linea exterior:linea de marcador-#
self.__getMsAnchorpoint(msSymbol, props)
qgsSubSymbol = self.__getQgsMarkerSubSymbol(
type_marker, msSymbol, size, props)
self.deleteProperties(props_parent,
_qgis.MARKER_LINE_SYMBOL_LAYER)
qgsSymbol = QgsMarkerLineSymbolLayerV2.create(props_parent)
qgsSymbol.setSubSymbol(qgsSubSymbol)
elif type_marker == _ms.MS_SYMBOL_HATCH:
if not props['use_custom_dash']:
#-relleno simple (con estilo de relleno)-#
self.deleteProperties(props,
_qgis.SIMPLE_LINE_SYMBOL_LAYER)
qgsSymbol = QgsSimpleLineSymbolLayerV2.create(props)
else:
#-Patron de relleno de linea-#
self.deleteProperties(props,
_qgis.SIMPLE_LINE_SYMBOL_LAYER)
qgsSubSymbol = self.__getSubSymbol(
QgsLineSymbolV2, QgsSimpleLineSymbolLayerV2, QGis.Line,
props)
self.deleteProperties(props_parent,
_qgis.LINE_PATTERN_FILL_SYMBOL_LAYER)
qgsSymbol = QgsLinePatternFillSymbolLayer.create(
props_parent)
qgsSymbol.setSubSymbol(qgsSubSymbol)
elif type_marker == _ms.MS_SYMBOL_PIXMAP:
#-relleno de imagen raster-#
self.deleteProperties(props, _qgis.RASTER_FILL_SYMBOL_LAYER)
qgsSymbol = QgsRasterFillSymbolLayer.create(props)
elif type_marker == _ms.MS_SYMBOL_SVG:
#-relleno SVG-#
self.deleteProperties(props, _qgis.SIMPLE_LINE_SYMBOL_LAYER)
qgsSubSymbol = self.__getSubSymbol(QgsLineSymbolV2,
QgsSimpleLineSymbolLayerV2,
QGis.Line, props)
self.deleteProperties(props_parent,
_qgis.SVG_FILL_SYMBOL_LAYER)
qgsSymbol = QgsSVGFillSymbolLayer.create(props_parent)
qgsSymbol.setSubSymbol(qgsSubSymbol)
else:
#-patron de relleno de puntos-#
self.__getMsAnchorpoint(msSymbol, props)
qgsSubSymbol = self.__getQgsMarkerSubSymbol(
type_marker, msSymbol, size, props)
self.deleteProperties(props_parent,
_qgis.POINT_PATTERN_FILL_SYMBOL_LAYER)
qgsSymbol = QgsPointPatternFillSymbolLayer.create(props_parent)
qgsSymbol.setSubSymbol(qgsSubSymbol)
#qgsSymbol.setAlpha((opacity*1.0)/100)
#print(props)
return qgsSymbol
