def testFixedColorVaryingWidth(self):
""" test that rendering a interpolated line with varying width and fixed color"""
interpolated_width = QgsInterpolatedLineWidth()
interpolated_color = QgsInterpolatedLineColor()
interpolated_width.setIsVariableWidth(True)
interpolated_width.setMinimumValue(1)
interpolated_width.setMaximumValue(8)
interpolated_width.setMinimumWidth(1)
interpolated_width.setMaximumWidth(10)
interpolated_color.setColor(QColor(0, 255, 0))
interpolated_color.setColoringMethod(
QgsInterpolatedLineColor.SingleColor)
self.renderImage(interpolated_width, interpolated_color,
'interpolatedlinesymbollayer_3')
def testVaryingColorVaryingWidthExact(self):
""" test that rendering a interpolated line with varying width and varying color with exact color ramp """
interpolated_width = QgsInterpolatedLineWidth()
interpolated_color = QgsInterpolatedLineColor()
interpolated_width.setIsVariableWidth(True)
interpolated_width.setMinimumValue(1)
interpolated_width.setMaximumValue(8)
interpolated_width.setMinimumWidth(1)
interpolated_width.setMaximumWidth(10)
color_ramp = QgsColorRampShader(
0, 10,
QgsStyle.defaultStyle().colorRamp('Viridis'),
QgsColorRampShader.Exact)
color_ramp.classifyColorRamp(10)
interpolated_color.setColor(color_ramp)
interpolated_color.setColoringMethod(
QgsInterpolatedLineColor.ColorRamp)
self.renderImage(interpolated_width, interpolated_color,
'interpolatedlinesymbollayer_6')
def testVaryingColorVaryingWidthDiscrete(self):
""" test that rendering a interpolated line with varying width and varying color with discrete color ramp """
interpolated_width = QgsInterpolatedLineWidth()
interpolated_color = QgsInterpolatedLineColor()
interpolated_width.setIsVariableWidth(True)
interpolated_width.setMinimumValue(1)
interpolated_width.setMaximumValue(8)
interpolated_width.setMinimumWidth(1)
interpolated_width.setMaximumWidth(10)
color_ramp = QgsColorRampShader(
2, 7,
QgsStyle.defaultStyle().colorRamp('RdGy'),
QgsColorRampShader.Discrete)
color_ramp.classifyColorRamp(5)
interpolated_color.setColor(color_ramp)
interpolated_color.setColoringMethod(
QgsInterpolatedLineColor.ColorRamp)
self.renderImage(interpolated_width, interpolated_color,
'interpolatedlinesymbollayer_5')