def append_CartographicLineSymbolLayer(symbol, layer):
"""
Appends a CartographicLineSymbolLayer to a symbol
"""
color = symbol_color_to_qcolor(layer.color)
out = QgsSimpleLineSymbolLayer(color)
out.setEnabled(layer.enabled)
out.setLocked(layer.locked)
out.setWidth(points_to_mm(layer.width))
out.setPenJoinStyle(symbol_pen_to_qpenjoinstyle(layer.join))
out.setPenCapStyle(symbol_pen_to_qpencapstyle(layer.cap))
if layer.pattern_parts:
interval = layer.pattern_interval
dash_vector = []
for part in layer.pattern_parts:
dash_vector.append(points_to_mm(part[0] * interval))
dash_vector.append(points_to_mm(part[1] * interval))
out.setCustomDashVector(dash_vector)
out.setUseCustomDashPattern(True)
# better matching of null stroke color to QGIS symbology
if out.color().alpha() == 0:
out.setPenStyle(Qt.NoPen)
if layer.marker_positions or layer.marker:
raise NotImplementedException(
'Cartographic line start/end markers are not yet supported')
# todo - change to new symbol layer if outline offset set
symbol.appendSymbolLayer(out)
def testSimpleLineUnitDefault(self):
symbol = QgsSimpleLineSymbolLayer(QColor("black"), 1)
symbol.setCustomDashVector([10, 10])
symbol.setUseCustomDashPattern(True)
symbol.setOffset(5)
dom, root = self.symbolToSld(symbol)
# print ("Simple line px: \n" + dom.toString())
self.assertStrokeWidth(root, 1, 4)
self.assertDashPattern(root, 4, '36 36')
self.assertStaticPerpendicularOffset(root, '18')
def testSimpleLineUnitDefault(self):
symbol = QgsSimpleLineSymbolLayer(QColor("black"), 1)
symbol.setCustomDashVector([10, 10])
symbol.setUseCustomDashPattern(True)
symbol.setOffset(5)
dom, root = self.symbolToSld(symbol)
# print ("Simple line px: \n" + dom.toString())
self.assertStrokeWidth(root, 1, 4)
self.assertDashPattern(root, 4, '36 36')
self.assertStaticPerpendicularOffset(root, '18')
def testSimpleLineUnitPixel(self):
symbol = QgsSimpleLineSymbolLayer(QColor("black"), 1)
symbol.setCustomDashVector([10, 10])
symbol.setUseCustomDashPattern(True)
symbol.setOffset(5)
symbol.setOutputUnit(QgsUnitTypes.RenderPixels)
dom, root = self.symbolToSld(symbol)
# print ("Simple line px: \n" + dom.toString())
self.assertStrokeWidth(root, 1, 1)
self.assertDashPattern(root, 4, '10 10')
self.assertStaticPerpendicularOffset(root, '5')
def testSimpleLineUnitPixel(self):
symbol = QgsSimpleLineSymbolLayer(QColor("black"), 1)
symbol.setCustomDashVector([10, 10])
symbol.setUseCustomDashPattern(True)
symbol.setOffset(5)
symbol.setOutputUnit(QgsUnitTypes.RenderPixels)
dom, root = self.symbolToSld(symbol)
# print ("Simple line px: \n" + dom.toString())
self.assertStrokeWidth(root, 1, 1)
self.assertDashPattern(root, 4, '10 10')
self.assertStaticPerpendicularOffset(root, '5')
def testSimpleLineWithCustomDashPatternHairline(self):
""" test that rendering a simple line symbol with custom dash pattern"""
layer = QgsSimpleLineSymbolLayer(QColor(0, 0, 0))
layer.setWidth(0)
layer.setCustomDashVector([3, 3, 2, 2])
layer.setUseCustomDashPattern(True)
symbol = QgsLineSymbol()
symbol.changeSymbolLayer(0, layer)
image = QImage(200, 200, QImage.Format_RGB32)
painter = QPainter()
ms = QgsMapSettings()
geom = QgsGeometry.fromWkt('LineString (0 0, 10 0, 10 10, 0 10, 0 0)')
f = QgsFeature()
f.setGeometry(geom)
extent = geom.constGet().boundingBox()
# buffer extent by 10%
extent = extent.buffered((extent.height() + extent.width()) / 20.0)
ms.setExtent(extent)
ms.setOutputSize(image.size())
context = QgsRenderContext.fromMapSettings(ms)
context.setPainter(painter)
context.setScaleFactor(96 / 25.4) # 96 DPI
painter.begin(image)
image.fill(QColor(255, 255, 255))
symbol.startRender(context)
symbol.renderFeature(f, context)
symbol.stopRender(context)
painter.end()
self.assertTrue(
self.imageCheck(
'symbol_layer_simpleline_customdashpattern_hairline',
'simpleline_customdashpattern_hairline', image))
def testSimpleLineWithCustomDashPattern(self):
""" test that rendering a simple line symbol with custom dash pattern"""
layer = QgsSimpleLineSymbolLayer(QColor(0, 0, 0))
layer.setWidth(0.5)
layer.setCustomDashVector([2, 5])
layer.setUseCustomDashPattern(True)
symbol = QgsLineSymbol()
symbol.changeSymbolLayer(0, layer)
image = QImage(200, 200, QImage.Format_RGB32)
painter = QPainter()
ms = QgsMapSettings()
geom = QgsGeometry.fromWkt('LineString (0 0, 10 0, 10 10, 0 10, 0 0)')
f = QgsFeature()
f.setGeometry(geom)
extent = geom.constGet().boundingBox()
# buffer extent by 10%
extent = extent.buffered((extent.height() + extent.width()) / 20.0)
ms.setExtent(extent)
ms.setOutputSize(image.size())
context = QgsRenderContext.fromMapSettings(ms)
context.setPainter(painter)
context.setScaleFactor(96 / 25.4) # 96 DPI
painter.begin(image)
image.fill(QColor(255, 255, 255))
symbol.startRender(context)
symbol.renderFeature(f, context)
symbol.stopRender(context)
painter.end()
self.assertTrue(self.imageCheck('symbol_layer_simpleline_customdashpattern', 'simpleline_customdashpattern', image))
