I developed a QGIS Plugin with QGIS Designer but my UI does not look as nice as original QGIS Tools and I was wondering if its possible to make them as good looking.

Specifically, I don't manage to create a nice explanation box like the ones of the original QGIS tools. In the following example, the titel has a higher font and the whole box can be dynamically made smaller or bigger. Any ideas on how this can be done or perhabs a useful link I missed?

enter image description here

  • You can take a look at the .ui which can be found in your QGIS 3 directory, e.g.: C:/Program Files/QGIS 3.8/apps/qgis/python/plugins/processing/ui/DlgAlgorithmBase.ui or from this link
    – Joseph
    Oct 10 '19 at 9:56

Your screenshot shows the dialog of a processing script. You can create your own scripts by subclassing the QgsProcessingAlgorithm class and re-implementing its methods. The explanation box in your screenshot is achieved simply by re-implementing the shortHelpString() method and returning the text you wish to appear in the explanation box as a string.

There are several good tutorials with templates for writing processing scripts in QGIS 3:




If you want to package a script or collection of scripts into a plugin, you can use Plugin Builder to create a processing plugin which will add a provider in the processing toolbox, containing your custom algorithms.


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