[QGIS-Developer] Adding a panel to layer properties dialog from a python plugin

[Ricardo Filipe Soares Garcia da]

Hi Denis, all

I keep forgetting there are now also (totally cool) docs for the python
API... I guess old habits die hard ;)

>From your tip I guess the problem I'm facing is likely related to my class
inheriting from the wrong base ( as I'm not using QgsOptionsPageWidget).

I'll try it out later and let you know ;)

As for the raster layer properties dialog , is this indeed not implemented
there?

Best regards


Denis Rouzaud <denis.rouzaud at gmail.com> escreveu no dia quinta, 18/10/2018
à(s) 01:49:

> Hi Ricardo,
>
> For python, looking at the python API is always a good start ;)
>
> https://qgis.org/pyqgis/master/gui/other/QgisInterface.html#qgis.gui.QgisInterface.registerOptionsWidgetFactory
>
> This means you must give a QgsOptionsWidgetFactory
> https://qgis.org/pyqgis/master/gui/Options/QgsOptionsWidgetFactory.html
>
> Here the docs could be clearer but this is the class you have to inherit.
> You need to implement title, icon and createWidget. In the latter, you'll
> be able to load your UI and return the widget to be displayed. The widget
> you return must inherit QgsOptionsPageWidget.
>
> I hope this helps!
>
>
> Denis
>
> On Wed, 17 Oct 2018, 18:24 Ricardo Filipe Soares Garcia da, <
> ricardo.garcia.silva at gmail.com> wrote:
>
>> Hi all
>>
>> The API docs for QgisInterface[1] mention the existence of a
>> `registerMapLayerConfigWidgetFactory()` method which says in its
>> documentation:
>>
>> > Register a new tab in the vector layer properties dialog.
>>
>> I've been trying to test this out and see if I can add a new panel to a
>> layer's properties dialog via a Python plugin. So far I've had no luck.
>> Couldn't find any other docs/samples online showing how to do this. Perhaps
>> someone can help me out?
>>
>> Here is what I have:
>>
>> -  made a custom .ui file in Qt designer with a simple QWidget that only
>> has a QLabel inside
>> -  implemented a class inheriting from both
>> `qgis.gui.QgsMapLayerConfigWidget` and my ui file (after it is loaded with
>> uic.loadUiType)
>> - implemented a class inheriting from
>> `qgis.gui.QgsMapLayerConfigWidgetFactory`. This class implements all of the
>> methods declared as *virtual* in the cpp API, including the
>> `createWidget()`, which returns a new instance of my custom
>> maplayerconfigwidget class
>> - in my plugin's `initGui()` method I'm calling
>> `iface.registerMapLayerConfigWidgetFactory()` and pass along my custom
>> factory
>>
>> I guess this should be enough to have a minimum working prototype.
>> However, this is what happens:
>>
>> - When I load up a vector layer and then open it's properties dialog,
>> QGIS just crashes with a core dumped message.
>> - When I load up a raster layer and then open it's properties dialog,
>> nothing happens. I suspect this functionality is probably not even
>> available for raster layers. Is this true?
>>
>> Can someone provide some pointers or some existing reference on how this
>> would work? Thanks in advance
>>
>> [1] -
>> https://qgis.org/api/classQgisInterface.html#a2c64949239a7717d181e34d6f2c47851
>>
>> --
>> ___________________________ ___ __
>> Ricardo Garcia Silva
>> _______________________________________________
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>
> --
>
> Denis Rouzaud
> denis at opengis.ch  <denis at opengis.ch>
> +41 76 370 21 22
>
>
>

-- 
___________________________ ___ __
Ricardo Garcia Silva
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