def subRenderer(self, color): lineSymbol = QgsLineSymbolV2() arrowSymbol = QgsArrowSymbolLayer().create() arrowSymbol.setArrowWidth(0.0) arrowSymbol.setArrowStartWidth(0.0) arrowSymbol.setColor(color) arrowSymbol.setIsCurved(False) arrowSymbol.setIsRepeated(False) renderSetting = QgsRenderContext() renderSetting.setFlag(QgsRenderContext.Antialiasing, False) renderSetting.setFlag(QgsRenderContext.DrawSymbolBounds, False) renderSetting.setFlag(QgsRenderContext.ForceVectorOutput, False) renderSetting.setFlag(QgsRenderContext.UseAdvancedEffects, False) renderSetting.setFlag(QgsRenderContext.UseRenderingOptimization, False) arrEffectStack = arrowSymbol.paintEffect() effList = arrEffectStack.effectList() for i in range(0, len(effList)): if type(effList[i]) == QgsDrawSourceEffect: effList[i].setDrawMode(1) arrEffectStack.setEnabled(True) lineSymbol.appendSymbolLayer(arrowSymbol) return lineSymbol
def changeSymbol(self): """Change symbology from seleted layer""" if isinstance(self.lyr.renderer(),QgsSingleSymbolRenderer) == True: symbLyr = QgsArrowSymbolLayer() symbLyr.setIsCurved(False) symbLyr.setIsRepeated(True) self.lyr.renderer().symbol().changeSymbolLayer(0, symbLyr) self.lyr.triggerRepaint() self.iface.layerTreeView().refreshLayerSymbology(self.lyr.id()) else: QMessageBox.warning(None,"Can't change symbology","The layer must be single symbol")