[QGIS-trac] Re: [Quantum GIS] #1716: improvements to ZoomLast, ZoomNext tools (extent history)

[Quantum GIS]

#1716: improvements to ZoomLast, ZoomNext tools (extent history)
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        Reporter:  smizuno           |         Owner:  mhugent      
            Type:  patch             |        Status:  new          
        Priority:  minor: annoyance  |     Milestone:  Version 1.2.0
       Component:  GUI               |       Version:  HEAD         
      Resolution:                    |      Keywords:               
Platform_version:                    |      Platform:  All          
        Must_fix:  No                |   Status_info:  0            
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Comment (by smizuno):

 Replying to [comment:5 lutra]:
 > As a fact I applied the patch to a more recent version (I don't remember
 exactly, I compile from source very day), but I had to make some changes
 manually as since you posted the patch the code has changed, so it is
 possible that I made something wrong (I also didn't see any changes in the
 zoom buttons).
 Upon applying the patch to r11258 I found that one part for QgisApp
 patches the wrong place which caused some null pointers that were used
 before being initialized. The part that was affected was where signals are
 connected. I can't figure out why the patch is applied rather than failing
 to patch.

 I have created a revised patch file.

 The zoomlast button will be enabled and the zoomnext button is disabled
 when QGIS is first started. If you load a project both buttons will be
 disabled until some zooming or panning is done. Then you can navigate the
 history of the zoom/pan with the buttons.

-- 
Ticket URL: <https://trac.osgeo.org/qgis/ticket/1716#comment:6>
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