[Qgis-developer] Improvements to the value relation widget: port to C++?

[kimaidou]

Hi all,

I also think merging things is the way to go, but we should keep the
feature provided by the "value relation" widget : it is not used to add
children referring the current object edited, but instead it is used to
create a combo box containing labels helping to fill the field data which
is a foreign key. For me, the logic is reversed. The data structure is the
same, but the with a different point of view ( child or parent).

Regards,
Michaël

2016-02-02 10:16 GMT+01:00 Neumann, Andreas <a.neumann at carto.net>:

> Hi Alessandro,
>
> Yesterday I had a meeting with Matthias regarding widget improvements. We
> also have a wishlist of widget improvements. I agree that it would make
> sense to port your dynamic values list filtering Python plugin to C++.
>
> In your proposal I would prefer option 1) or try to marry the "Value
> Relation" widget with the "Relation Reference" widget and introduce your
> new filtering mechanism. Note that the "relation reference" and the "value
> relation" widgets both have filter options, but only with in the widget
> itself, not in relation with other widgets, like your plugin.
>
> -----------------------------------------
>
> Over the years, quite some overlap appeared in the widgets. In my opinion,
> with QGIS 3.0, we should do an effort to clean up the overlapping widgets.
> But we'd need an "update strategy" for old obsolete widgets and make sure
> that the new widget variants really do all that the old widgets could do.
>
> As an example:
>
> The "Value Relation" and the "Relation Reference" Widgets have a lot of
> overlaps. Ideally they should be combined into one widget.
>
> The newly introduced "External Resource" widget makes the "Photo",
> "Filename" and potentially also the "Web View" more or less obsolete.
>
> I think the QGIS users would prefer a smaller list of widgets with
> options, and not many overlapping widgets that do very similar things.
>
> Andreas
>
> On 2016-02-02 09:52, Alessandro Pasotti wrote:
>
> Hi,
>
> to allow for drill-down forms, a few months ago, I've created a modified
> value relation widget with a companion form function that allow to
> implement dynamic filtering (or altering) of fields in a form.
>
> It can be easily ported in the core (it's basically a clone of the
> existing  value relation widget).
>
> The widget is available as a python plugin.
> http://plugins.qgis.org/plugins/FormAwareValueRelationWidget/
> More information here:
>
> http://www.itopen.it/a-new-qgis-plugin-allows-dynamic-filtering-of-values-in-forms
>
> The main question is if there is any interest in porting this widget into
> the core, then if this should be
> 1. a replacement of the existing value relation widget
> 2. an optional feature of the existing value relation widget
> 3. a new widget
>
>
> I would like to hear your thoughts about this.
>
>
> --
> Alessandro Pasotti
> w3:   www.itopen.it
>
>
>
>
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