[Qgis-developer] [plugins] refreshing canvas

[Nathan Woodrow]

Hey,

I suspect you are running into this
http://gis.stackexchange.com/questions/87841/why-qgsmapcanvas-only-appear-after-lost-focus

Here is a "fix" http://gis.stackexchange.com/a/92734/97

- Nathan

On Tue Nov 25 2014 at 9:34:14 AM Alexia Mondot <alexia.mondot at free.fr>
wrote:

>  Thanks for your answer.
>
> Actually, I wonder if my refresh problem is not only on QGIS 2.2. I
> believe I had not reproduce this behaviour on QGIS 2.4 and 2.6. And I
> didn't know about the bug.
> I have these two points to analyse.
>
> The multithread rendering was available in QGIS 2.2 ??
>
> I'm going to work on the two previous points.
>
> Thanks again,
> Alexia
>
>
>
> On 24/11/2014 23:52, Luigi Pirelli wrote:
>
> could be related with this?
> https://hub.qgis.org/issues/9799
>
> check OTF reprojection combination
>
> regards, Luigi Pirelli
>
> On 24 November 2014 at 23:49, Luigi Pirelli <luipir at gmail.com> <luipir at gmail.com> wrote:
>
>  may you also test with the last 2.6version?
>
> regards, Luigi Pirelli
>
> On 24 November 2014 at 01:16, Alexia Mondot <alexia at mondot.fr> <alexia at mondot.fr> wrote:
>
>  Hi all,
>
> I have a plugin using a customized version of Dockable Mirror Map.
> I use it to display each processing result in a new view.
>
> I get a strange behaviour with my plugin :
> Some times, the canvas stays white. A scroll in it is fine to reload it and
> my image is displayed.
> I get this problem since the beginning of the development on QIGS 2.2. It is
> for me a "random" problem, because I can't say why I get these white canvas.
> But, when I get it I save the projet with the white view, and when reloaded,
> the canvas is still white.
>
> I've played with canvas.refresh(), canvas renderer flags and even with
> canvas.freeze().
> I can't understand the behaviour I get, maybe I have a wrong usage of the
> properties above.
> I also thought about triggerRepaint()...
>
> Thanks by advance,
> Alexia
>
>
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