[QGIS-Developer] Adding Layer tree embedded widgets programmatically

[Raymond Nijssen]

Sorry, forgot to add the link :blush:

https://gis.stackexchange.com/questions/232367/showing-transparency-slider-by-default-in-layers-panel-of-qgis

On 13-02-19 12:59, Raymond Nijssen wrote:
> Hi Richard,
> 
> Here is some example code. I will try to make it work now.
> 
> Groetjes!
> Raymond
> 
> 
> On 13-02-19 12:37, Richard Duivenvoorde wrote:
>> Hi Devs,
>>
>> Thinking about creating a small plugin which would add a 'Layer tree
>> embedded widget' to a layer in the legend, I hit:
>>
>> https://github.com/qgis/QGIS/pull/3170
>>
>> with a nice example on how to create such a widget (with 2 minor tweaks
>> see below).
>>
>> But my question is if it is possible (in the python plugin) to attach
>> such widget to a specific layer? Now it is working but you can only
>> activate it via the layerproperties dialog.
>>
>> I could not find a example or hint for it.
>>
>> Any pointers appreciated.
>>
>> Regards,
>>
>> Richard Duivenvoorde
>>
>> PS
>>
>> To make Martins example https://github.com/qgis/QGIS/pull/3170) work in
>> QGIS3:
>>
>> from PyQt4.QtGui import QComboBox
>> becomes
>> from qgis.PyQt.QtWidgets import QComboBox
>>
>> QgsLayerTreeEmbeddedWidgetRegistry.instance().addProvider(provider)
>> becomes
>> QgsGui.layerTreeEmbeddedWidgetRegistry().addProvider(provider)
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