Graphics Reference
In-Depth Information
Combining symbol layers
By combining symbol layers, you can achieve a range of complex visual effects. For ex-
ample, you can combine an instance of
QgsSimpleMarkerSymbolLayerV2
with an
instance of
QgsVectorFieldSymbolLayer
to display a point geometry using two
symbols at once:
One of the main uses of symbol layers is to draw different LineString or PolyLine symbols
to represent different types of roads. For example, you can draw a complex road symbol by
combining multiple symbol layers, like this:
This effect is achieved by using three separate symbol layers:
Here is the Python code used to generate the preceding map symbol:
