def create_join_renderer(self, layer, field, classes, mode, color='PuBu'):
symbol = QgsSymbolV2.defaultSymbol(layer.geometryType())
style = QgsStyleV2().defaultStyle()
colorRamp = style.colorRampRef(color)
renderer = QgsGraduatedSymbolRendererV2.createRenderer(layer, field, classes, mode, symbol, colorRamp)
label_format = self.create_join_label_format(2)
renderer.setLabelFormat(label_format)
return renderer
def create_join_renderer(layer, field, classes, mode, color='Blues'):
symbol = QgsSymbolV2.defaultSymbol(layer.geometryType())
style = QgsStyleV2().defaultStyle()
colorRamp = style.colorRampRef(color)
renderer = QgsGraduatedSymbolRendererV2.createRenderer(
layer, field, classes, mode, symbol, colorRamp)
label_format = create_join_label_format(2)
renderer.setLabelFormat(label_format)
return renderer
def add_symbology(self):
low_color = self.color_low_value.color()
high_color = self.color_high_value.color()
index = self.cbx_mode.currentIndex()
mode = self.cbx_mode.itemData(index)
classes = self.spinBox_classes.value()
# Compute renderer
# noinspection PyArgumentList
symbol = QgsSymbolV2.defaultSymbol(QGis.Polygon)
color_ramp = QgsVectorGradientColorRampV2(low_color, high_color)
# noinspection PyArgumentList
renderer = QgsGraduatedSymbolRendererV2.createRenderer(
self.output_layer, self.name_field, classes, mode, symbol,
color_ramp)
self.output_layer.setRendererV2(renderer)
def add_symbology(self):
low_color = self.color_low_value.color()
high_color = self.color_high_value.color()
index = self.cbx_mode.currentIndex()
mode = self.cbx_mode.itemData(index)
classes = self.spinBox_classes.value()
# Compute renderer
# noinspection PyArgumentList
symbol = QgsSymbolV2.defaultSymbol(QGis.Polygon)
color_ramp = QgsVectorGradientColorRampV2(low_color, high_color)
# noinspection PyArgumentList
renderer = QgsGraduatedSymbolRendererV2.createRenderer(
self.output_layer,
self.name_field,
classes,
mode,
symbol,
color_ramp)
self.output_layer.setRendererV2(renderer)
def style_maps(self, layer=None, style_by=None):
if layer is None:
layer = self.layer
if style_by is None:
style_by = self.default_field_name
symbol = QgsSymbolV2.defaultSymbol(layer.geometryType())
# see properties at:
# https://qgis.org/api/qgsmarkersymbollayerv2_8cpp_source.html#l01073
symbol.setAlpha(1) # opacity
if isinstance(symbol, QgsMarkerSymbolV2):
# do it only for the layer with points
self._set_symbol_size(symbol)
symbol.symbolLayer(0).setOutlineStyle(Qt.PenStyle(Qt.NoPen))
style = get_style(layer, self.iface.messageBar())
# this is the default, as specified in the user settings
ramp = QgsVectorGradientColorRampV2(style['color_from'],
style['color_to'])
mode = style['mode']
# in most cases, we override the user-specified setting, and use
# instead a setting that was required by scientists
if self.output_type in OQ_TO_LAYER_TYPES:
default_qgs_style = QgsStyleV2().defaultStyle()
default_color_ramp_names = default_qgs_style.colorRampNames()
if self.output_type in ('dmg_by_asset', 'losses_by_asset',
'avg_losses-stats'):
# options are EqualInterval, Quantile, Jenks, StdDev, Pretty
# jenks = natural breaks
mode = QgsGraduatedSymbolRendererV2.Jenks
ramp_type_idx = default_color_ramp_names.index('Reds')
inverted = False
elif self.output_type in ('hmaps', 'gmf_data', 'ruptures'):
# options are EqualInterval, Quantile, Jenks, StdDev, Pretty
if self.output_type == 'ruptures':
mode = QgsGraduatedSymbolRendererV2.Pretty
else:
mode = QgsGraduatedSymbolRendererV2.EqualInterval
ramp_type_idx = default_color_ramp_names.index('Spectral')
inverted = True
ramp = default_qgs_style.colorRamp(
default_color_ramp_names[ramp_type_idx])
graduated_renderer = QgsGraduatedSymbolRendererV2.createRenderer(
layer,
style_by,
style['classes'],
mode,
symbol,
ramp,
inverted=inverted)
label_format = graduated_renderer.labelFormat()
# label_format.setTrimTrailingZeroes(True) # it might be useful
label_format.setPrecision(2)
graduated_renderer.setLabelFormat(label_format, updateRanges=True)
# add a class for 0 values, unless while styling ruptures
if self.output_type != 'ruptures':
VERY_SMALL_VALUE = 1e-20
graduated_renderer.updateRangeLowerValue(0, VERY_SMALL_VALUE)
symbol_zeros = QgsSymbolV2.defaultSymbol(layer.geometryType())
symbol_zeros.setColor(QColor(240, 240, 240)) # very light grey
if isinstance(symbol, QgsMarkerSymbolV2):
# do it only for the layer with points
self._set_symbol_size(symbol_zeros)
symbol_zeros.symbolLayer(0).setOutlineStyle(
Qt.PenStyle(Qt.NoPen))
zeros_min = 0.0
zeros_max = VERY_SMALL_VALUE
range_zeros = QgsRendererRangeV2(
zeros_min, zeros_max, symbol_zeros,
" %.2f - %.2f" % (zeros_min, zeros_max), True)
graduated_renderer.addClassRange(range_zeros)
graduated_renderer.moveClass(
len(graduated_renderer.ranges()) - 1, 0)
layer.setRendererV2(graduated_renderer)
layer.setLayerTransparency(30) # percent
layer.triggerRepaint()
self.iface.legendInterface().refreshLayerSymbology(layer)
self.iface.mapCanvas().refresh()
