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 <[email protected]> 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 <[email protected]> > <[email protected]> wrote: > > may you also test with the last 2.6version? > > regards, Luigi Pirelli > > On 24 November 2014 at 01:16, Alexia Mondot <[email protected]> > <[email protected]> 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 > > > _______________________________________________ > Qgis-developer mailing > [email protected]http://lists.osgeo.org/mailman/listinfo/qgis-developer > > _______________________________________________ > Qgis-developer mailing > [email protected]http://lists.osgeo.org/mailman/listinfo/qgis-developer > > > _______________________________________________ > Qgis-developer mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/qgis-developer
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