[Qgis-developer] Map swipe tool in QGIS

[Luigi Pirelli]

Good to know :)

during hackfest, surfing the code with Jürgen to hunt a blocker bug, I
noticed that there where a lot use of the function
QgisApp::instance()->mapCanvas() => some functions at the "app" level
refers only to a unique canvas reducing the ability to interact with
multiple canvas.

it's a feature or really a limit?

regards, Luigi Pirelli

On 31 July 2014 10:21, Nathan Woodrow <madmanwoo at gmail.com> wrote:
> Yes it can be done. I'm working on a plugin at the moment and as a core
> feature.
>
> Nathan
>
> On Jul 31, 2014 6:16 PM, "Sören Gebbert" <soerengebbert at googlemail.com>
> wrote:
>>
>> Dear list,
>> i would like to know if it is possible to implement a plugin in QGIS
>> to overlay two map layer for interactive comparison, like the Map
>> Swipe tool in GRASS GIS[1,2].
>>
>> If it is possible, what would be the best approach to implement it?
>>
>> Many thanks in advance,
>> Best regards
>> Soeren
>>
>> [1] http://grass.osgeo.org/grass70/manuals/wxGUI.mapswipe.html
>> [2] https://www.youtube.com/watch?v=xc7YLIYbsP0
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