本文整理汇总了Python中qgis.core.QgsFontMarkerSymbolLayer.setDataDefinedProperty方法的典型用法代码示例。如果您正苦于以下问题：Python QgsFontMarkerSymbolLayer.setDataDefinedProperty方法的具体用法？Python QgsFontMarkerSymbolLayer.setDataDefinedProperty怎么用？Python QgsFontMarkerSymbolLayer.setDataDefinedProperty使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类qgis.core.QgsFontMarkerSymbolLayer的用法示例。
在下文中一共展示了QgsFontMarkerSymbolLayer.setDataDefinedProperty方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: testPartNum
# 需要导入模块: from qgis.core import QgsFontMarkerSymbolLayer [as 别名]
# 或者: from qgis.core.QgsFontMarkerSymbolLayer import setDataDefinedProperty [as 别名]
def testPartNum(self):
# test geometry_part_num variable
s = QgsLineSymbol()
s.deleteSymbolLayer(0)
sym_layer = QgsGeometryGeneratorSymbolLayer.create({'geometryModifier': 'segments_to_lines($geometry)'})
sym_layer.setSymbolType(QgsSymbol.Line)
s.appendSymbolLayer(sym_layer)
marker_line = QgsMarkerLineSymbolLayer(False)
marker_line.setPlacement(QgsMarkerLineSymbolLayer.FirstVertex)
f = QgsFontUtils.getStandardTestFont('Bold', 24)
marker = QgsFontMarkerSymbolLayer(f.family(), 'x', 24, QColor(255, 255, 0))
marker.setDataDefinedProperty(QgsSymbolLayer.PropertyCharacter, QgsProperty.fromExpression('@geometry_part_num'))
marker_symbol = QgsMarkerSymbol()
marker_symbol.changeSymbolLayer(0, marker)
marker_line.setSubSymbol(marker_symbol)
marker_line.setAverageAngleLength(0)
line_symbol = QgsLineSymbol()
line_symbol.changeSymbolLayer(0, marker_line)
sym_layer.setSubSymbol(line_symbol)
# rendering test
g = QgsGeometry.fromWkt('LineString(0 0, 10 0, 10 10, 0 10)')
rendered_image = self.renderGeometry(s, g, buffer=4)
assert self.imageCheck('part_num_variable', 'part_num_variable', rendered_image)
marker.setDataDefinedProperty(QgsSymbolLayer.PropertyCharacter,
QgsProperty.fromExpression('@geometry_part_count'))
# rendering test
g = QgsGeometry.fromWkt('LineString(0 0, 10 0, 10 10, 0 10)')
rendered_image = self.renderGeometry(s, g, buffer=4)
assert self.imageCheck('part_count_variable', 'part_count_variable', rendered_image)