Changing the Processing plugin icon - QGIS

Question

I have built a processing plugin which shows up in the QGIS Processing Toolbox. However, I am struggling trying to change the icon. Usually I do:

pyrcc5 -o resources.py resources.qrc

and it updates perfectly.

However, I do not have a

resources.py

file so I cannot adopt this approach. Is there another way to update it?

Answer 1

I was also looking for a way to do this too and found out the way. The command

pyrcc5 -o resources.py resources.qrc

will generate resources.py using the resources.qrc is input.

To change your icon:

1. create the file resources.qrc with content like this:

<RCC>
    <qresource prefix="/plugins/your_plugin" >
        <file>logo.svg</file>
    </qresource>
</RCC>

2. Make sure logo.svg or your icon is in the root directory of your plugin.

3. Run: pyrcc5 -o resources.py resources.qrc

To reiterate, resources.py does not exist before you run this command. resources.py will be generated after this command.

4. Import resources.py in your script and call for the icon:

from qgis.PyQt.QtGui import QIcon
from qgis.core import QgsProcessingProvider
from . import resources

class YourAlgorithmProvider(QgsProcessingProvider):
    # some class definitions here
    def icon(self):
        return QIcon(':/plugins/your_plugin/logo.svg')