Feature request #1898

Group Transparency/Opacity for Legend Groups

Added by Andreas Neumann over 7 years ago. Updated almost 2 years ago.

Status:Open Start Date:
Priority:Low Due date:
Assigned to:- % Done:

0%

Category:Symbology
Target version:Future Release - Nice to have
Platform:Debian Resolution:
Platform version: Pull Request or Patch supplied:No
Status info:0 Tag:

Description

It would be nice if we could have group transparency (on groups of layers). This is a concept available in SVG (and potentially other technologies). The difference is that with group opacity/transparency, the layers in the group are rendered first individually (with or without opacity) and then the transparency is added on the intermediate rendering result of the group as a whole.

The difference is clearly seen if you have layers in a group where polygons of different layers overlap. You don't want opacity on the individual layers (since this would change colors), but you want to be able to set the opacity on the parent group, for being able to have a background base map shine through.

Here are two links on the topic:
http://www.w3.org/TR/SVG/masking.html#ObjectAndGroupOpacityProperties and http://labs.trolltech.com/blogs/2009/04/23/layered-rendering-part-2-it-helps-solve-many-problems/


Related issues

related to QGIS Application - Feature request #3438: Transparency for vector symbol layers Closed

History

Updated by Giovanni Manghi over 5 years ago

  • Target version changed from Version 1.7.0 to Version 1.7.4

Updated by Giovanni Manghi almost 5 years ago

  • Target version changed from Version 1.7.4 to Version 2.0.0

Updated by Giovanni Manghi over 4 years ago

  • Assigned to deleted (nobody -)
  • Pull Request or Patch supplied set to No

see also #6198

Updated by Pirmin Kalberer over 4 years ago

  • Target version changed from Version 2.0.0 to Future Release - Nice to have

Updated by Andreas Neumann almost 2 years ago

see also #3438

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