[Qgis-developer] QEP about Multimap support for QGIS

[Tim Sutton]

Hi

Alvaro I also think this would be very interesting to add - and timely to get into QGIS 3.0. Looking forward to hearing opinions from other devs. I expect there will be many many corner cases you will have to deal with where there is currently an implicit assumption that only 1 canvas exists....

Regards

Tim


> On 25 Aug 2016, at 11:31 AM, A Huarte <ahuarte47 at yahoo.es> wrote:
> 
> Thank you very much Filipe!
> 
> The extra maps are normal windows as any dockable window in QGIS. It is a QDockWidget object, and your behavior is as usual.
> 
> Best regards
> Alvaro
> 
> De: Filipe Dias <filipesdias at gmail.com>
> Para: A Huarte <ahuarte47 at yahoo.es>
> CC: "Qgis-developer at lists.osgeo.org" <Qgis-developer at lists.osgeo.org>
> Enviado: Jueves 25 de agosto de 2016 9:39
> Asunto: Re: [Qgis-developer] QEP about Multimap support for QGIS
> 
> Hi,
> Really nice feature in my opinion. Out of curiosity: would it be possible to split Map 1 and Map 2 between two different screens? It would be really nice to be able to drag Map 2's window to a second screen.
> Thanks
> Cheers
> 
> 
> On Thu, Aug 25, 2016 at 2:36 AM, A Huarte <ahuarte47 at yahoo.es <mailto:ahuarte47 at yahoo.es>> wrote:
> Hi devs, I have developed an experimental code to support more than one map in QGIS. I created a video showing the features implemented ( https://vimeo.com/179982647 <applewebdata://9CABA1DD-9D2E-495D-9A72-9E75F439FC2E> ).
> 
> The main features are:
> 
> New user option to enable multi map canvas mode.
> QGIS has one no closeable default map, and 0-N extra dockable maps.
> Full integration of maps in legend using a new map legend node for each map.
> Print composer supports layouts with different maps.
> New legend menu option to synchronize the extent of maps.
> Map tools and plugins work with the current selected map (The signals and slots to the map canvas are updated with an automatic mechanism of synchronization to minimize the migration of code and to preserve behavior).
> 
> I'm aware that this is a big change in QGIS, and I am sure that this capability must be debated by many people (project and developer leaders...) before writing any code. Because of that, I have not created any QEP entry in the https://github.com/qgis/ QGIS-Enhancement-Proposals <applewebdata://9CABA1DD-9D2E-495D-9A72-9E75F439FC2E>  page.
> 
> I developed it to learn QGIS core and it will have work to do (plugins and tools). But it runs fine, and it was funny :-). If at least, it is useful for a day to implement this capability in QGIS or to see the amount of changes needed, I am satisfied.
> 
> 
> 
> github:
> https://github.com/qgis/QGIS/ compare/master...ahuarte47: Feature_MultimapView <applewebdata://9CABA1DD-9D2E-495D-9A72-9E75F439FC2E>
> 
> video:
> Multi Map Canvas for QGIS <applewebdata://9CABA1DD-9D2E-495D-9A72-9E75F439FC2E>
> 
> 
>  <applewebdata://9CABA1DD-9D2E-495D-9A72-9E75F439FC2E>
> 
> 
> 
> 
> 
> Multi Map Canvas for QGIS
>  <applewebdata://9CABA1DD-9D2E-495D-9A72-9E75F439FC2E>
> Ver en vimeo.com <applewebdata://9CABA1DD-9D2E-495D-9A72-9E75F439FC2E>
> Vista previa por Yahoo
> 
> 
> 
> 
> Comments are welcome!
> 
> Best regards
> Alvaro Huarte - https://github.com/ahuarte47 <applewebdata://9CABA1DD-9D2E-495D-9A72-9E75F439FC2E>
> 
> 
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Tim Sutton

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