[Qgis-user] QGIS 2.18 -Changing layer rule-based style transparency

Tudorache, Marian Marian.Tudorache at navcanada.ca
Fri Jan 4 13:32:57 PST 2019


Hi,

I have a polygon type vector layer with rule-based style.
I need to change programmatically the layer transparency.

I used the following code:
layer = iface.activeLayer()
layer.setTransparency(80)
layer.triggerRepaint()
This works only if I want to see layers which are under the active one but it does not work for the features inside active layer.

When there are identical polygons which overlap within active layer, I can only see the top one. If I select a polygon which is underneath it is not displayed as selected.
I can make it work if I manually open the layer style and double click on rule to open Rule properties and set the transparency for the rule.
How can I change the rule transparency programmatically?
Thank you,
Marian


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