[QGIS-Developer] MetaSearch provider connections in master

[Alessandro Pasotti]

On Mon, Nov 13, 2017 at 3:59 PM, Tom Kralidis <tomkralidis at gmail.com> wrote:

> On Mon, Nov 13, 2017 at 9:18 AM, Alessandro Pasotti <apasotti at gmail.com>
> wrote:
> > On Mon, Nov 13, 2017 at 3:06 PM, Tom Kralidis <tomkralidis at gmail.com>
> wrote:
> >>
> >> Hi devs:
> >>
> >> Given https://issues.qgis.org/issues/17347 I'm working on fixing
> >> MetaSearch
> >> provider connections in master. The core part of the code is currently
> at
> >> [1]. A
> >> standalone example can be found at [2].  Result is that the WMS/WMTS
> >> provider
> >> opens connecting to the selected WMS/WMTS (good).  When clicking 'Ok',
> >> 'Close',
> >> or 'Add', the WMS/WMTS layer is added (expecting 'Close' to simply
> >> close the dialog
> >> and 'Ok' to add the layer and then close).  Finally clicking the 'X'
> >> (top right) closes
> >> the dialog as expected.
> >>
> >> - are there other slots to call instead?
> >> - should the Data Source Manager be used instead [3]?  Are there plans
> >> for providing
> >> Python binding to this?
> >
> >
> >
> > I can't tell if it's a good idea, but you can definitely add whatever you
> > want to the DataSourceManager dialog with plain python:
> >
> > class ConcreteDataSourceWidget(QgsAbstractDataSourceWidget):
> >     pass
> >
> > class ConcreteSourceSelectProvider(QgsSourceSelectProvider):
> >
> >     def providerKey(self):
> >         return "MyTestProviderKey"
> >
> >     def text(self):
> >         return "MyTestProviderText"
> >
> >     def icon(self):
> >         return QIcon()
> >
> >     def createDataSourceWidget(self):
> >         return ConcreteDataSourceWidget()
> >
> >     def ordering(self):
> >         return 1
> >
> > registry = QgsSourceSelectProviderRegistry()
> > registry.addProvider(ConcreteSourceSelectProvider())
> >
> > Note that the DataSourceManager dialog is created when QGIS starts, you
> will
> > want to register your provider early in the startup process, for now,
> there
> > is no way to refresh the dialog after it has been constructed.
> >
>
> Thanks Alessandro.  Is this example to add a provider type?  MetaSearch
> simply wants to open a given existing provider dialog, open based on a
> given
> provider type and let the user interact from there.
>
> ..Tom
>


Yes, that's the way to add a new "provider" (it does not really need to be
a provider) to the items in the data source manager dialog.

Maybe you wanted to use this:
http://qgis.org/api/classQgsDataSourceManagerDialog.html#a6b9046d38467a13ec321a70166bff289

Btw you can also get the individual source selects from provider registry:
QgsProviderRegistry.instance().createSelectionWidget('ogr').show()



Cheers.


> >
> >
> >
> >>
> >>
> >> Thanks
> >>
> >> ..Tom
> >>
> >> [1]
> >> https://github.com/qgis/QGIS/blob/master/python/plugins/
> MetaSearch/dialogs/maindialog.py#L759-L792
> >> [2] https://gist.github.com/tomkralidis/dccb49efa760a585be38ee0c3188b8
> b3
> >> [3] http://qgis.org/api/classQgsDataSourceManagerDialog.html
> >> _______________________________________________
> >> QGIS-Developer mailing list
> >> QGIS-Developer at lists.osgeo.org
> >> List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer
> >> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
> >
> >
> >
> >
> > --
> > Alessandro Pasotti
> > w3:   www.itopen.it
>



-- 
Alessandro Pasotti
w3:   www.itopen.it
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