def testFixedColorFixedWidth(self):
""" test that rendering a interpolated line with fixed width and fixed color"""
interpolated_width = QgsInterpolatedLineWidth()
interpolated_color = QgsInterpolatedLineColor()
interpolated_width.setIsVariableWidth(False)
interpolated_width.setFixedStrokeWidth(5)
interpolated_color.setColor(QColor(255, 0, 0))
interpolated_color.setColoringMethod(
QgsInterpolatedLineColor.SingleColor)
self.renderImage(interpolated_width, interpolated_color,
'interpolatedlinesymbollayer_1')
def testRenderNoFeature(self):
""" test that rendering a interpolated line outside of a map render works"""
interpolated_width = QgsInterpolatedLineWidth()
interpolated_color = QgsInterpolatedLineColor()
interpolated_width.setIsVariableWidth(False)
interpolated_width.setFixedStrokeWidth(5)
interpolated_color.setColor(QColor(255, 0, 0))
interpolated_color.setColoringMethod(
QgsInterpolatedLineColor.SingleColor)
layer = QgsInterpolatedLineSymbolLayer()
layer.setDataDefinedProperty(
QgsSymbolLayer.PropertyLineStartWidthValue,
QgsProperty.fromExpression('5'))
layer.setDataDefinedProperty(QgsSymbolLayer.PropertyLineEndWidthValue,
QgsProperty.fromExpression('1'))
layer.setDataDefinedProperty(
QgsSymbolLayer.PropertyLineStartColorValue,
QgsProperty.fromExpression('2'))
layer.setDataDefinedProperty(QgsSymbolLayer.PropertyLineEndColorValue,
QgsProperty.fromExpression('6'))
layer.setInterpolatedWidth(interpolated_width)
layer.setInterpolatedColor(interpolated_color)
symbol = QgsLineSymbol()
symbol.changeSymbolLayer(0, layer)
image = QImage(200, 200, QImage.Format_RGB32)
image.fill(QColor(255, 255, 255))
painter = QPainter(image)
context = QgsRenderContext.fromQPainter(painter)
symbol.startRender(context)
symbol.renderPolyline(
QPolygonF([QPointF(30, 50),
QPointF(100, 70),
QPointF(150, 30)]), None, context)
symbol.stopRender(context)
painter.end()
self.assertTrue(
self.imageCheck('interpolatedlinesymbollayer_no_feature',
'interpolatedlinesymbollayer_no_feature', image))
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 testVaryingColorFixedWidth(self):
""" test that rendering a interpolated line with fixed width and varying color"""
interpolated_width = QgsInterpolatedLineWidth()
interpolated_color = QgsInterpolatedLineColor()
interpolated_width.setIsVariableWidth(False)
interpolated_width.setFixedStrokeWidth(5)
color_ramp = QgsColorRampShader(
0, 7,
QgsStyle.defaultStyle().colorRamp('Viridis'),
QgsColorRampShader.Interpolated)
color_ramp.classifyColorRamp(10)
interpolated_color.setColor(color_ramp)
interpolated_color.setColoringMethod(
QgsInterpolatedLineColor.ColorRamp)
self.renderImage(interpolated_width, interpolated_color,
'interpolatedlinesymbollayer_2')
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')