[Qgis-developer] Using app MessageBar from providers ?

[Nathan Woodrow]

Hey Even,

I think this solution is fine. The other option I thought of in the past
was to have some kind of signal on the provider that gets passed up and
connected at a higher level.
Using QgsMessageLog is a good idea as it's generic and can be used by
everyone.

Regards,

On Sun, Apr 10, 2016 at 11:25 PM, Even Rouault <even.rouault at spatialys.com>
wrote:

> Le dimanche 10 avril 2016 15:21:14, Luigi Pirelli a écrit :
> > a provider does not need necessarily an iface where to send GUI
> > messages (e.g pyqgis scripts).... IMHO is one reason.
>
> Yes I know. Hence my proposal. The provider would continue using the
> message
> log interface, so with its current behaviour still preserved, but with an
> extra hint when the message is also aimed at being prominently displayed,
> if
> possible. In the case qgis_app is started it would listen for that and
> redirect the message to the message bar too.
>
> >
> > regards
> > Luigi Pirelli
> >
> >
> ***************************************************************************
> > *********************** * Boundless QGIS Support/Development: lpirelli AT
> > boundlessgeo DOT com * LinkedIn:
> https://www.linkedin.com/in/luigipirelli
> > * Stackexchange: http://gis.stackexchange.com/users/19667/luigi-pirelli
> > * GitHub: https://github.com/luipir
> > * Mastering QGIS:
> > https://www.packtpub.com/application-development/mastering-qgis
> >
> ***************************************************************************
> > ***********************
> >
> > On 10 April 2016 at 15:12, Even Rouault <even.rouault at spatialys.com>
> wrote:
> > > Hi,
> > >
> > > For the WFS provider, I'd like some messages, like a partial feature
> > > download, to be emitted in a more prominent way than just in the
> message
> > > log. The MessageBar would be appropriate for that, but from what I can
> > > see, it is not currently possible for a provider to use it. A search in
> > > src/providers shows that the same need was at least encountered once in
> > > the GRASS provider but the code is commented out as the provider
> doesn't
> > > link against qgis_app.
> > >
> > > So unless there's a good reason for a provider not to be able to use
> the
> > > message bar, I was thinking to the following mechanism to implement it
> :
> > > - QgsMessageLog would be extended to have 2 extra arguments bool
> > > displayInMessagerBar = false, int duration = 0 in logMessage() /
> > > messageReceived()
> > > - QgisApp would connect on messageReceived() and when the boolean is
> set,
> > > it would push the message to the main message bar.
> > >
> > > Any thoughts ?
> > >
> > > Even
> > >
> > > --
> > > Spatialys - Geospatial professional services
> > > http://www.spatialys.com
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