[Qgis-developer] Multiple Data Frames

[Benedict Holland]

So I found a few related bugs to what I wanted to do so I don't know if
this is incorporated already.

http://hub.qgis.org/issues/2348
http://hub.qgis.org/issues/4846

with the second link being what I think I am going for with one substantial
difference. I want to have a main map of a section of say, Maine or New
York zoomed in quite a bit to show a specific town. Then I want a map of
the state of Maine or New York in the corner of the main map with a box
describing the location of the main map. The way ArcGIS does this sort of
thing is sort of brilliant. The way I see this working is to
modify projects so they made up of a layer group:

Project -> Data Frames (at least 1 always, probably named something
different like Map Frame) -> Layers (0 or more)

and allow a data frame to be turned on or off in the composer (perhaps a
check box like display in composer). The active data frame will be
displayed in the main window and only one data frame can be active. Of
course both data frames will have to be movable in the composer as the main
map currently is. I am sure this feature will buy a lot more than just my
use case but I need this sort of functionality just to provide an overview
map embedded within the main map. Does this sound reasonable and doable?

Thanks all,
~Ben

On Sat, Jan 5, 2013 at 6:50 PM, G. Allegri <giohappy at gmail.com> wrote:

> Hi Benedict,
> besides the data frames cincepr, which would useful in many circumstances,
> aren't describing an overview map? It already exists in QGis. Probably I
> misunderstood your requirement...
>
> Giovanni
>
> Sent from Nexus
> Il giorno 06/gen/2013 00:37, "Benedict Holland" <
> benedict.m.holland at gmail.com> ha scritto:
>
>> Hi All,
>>
>> I just stumbled across this bit from Nathans blog:
>>
>> http://woostuff.wordpress.com/2011/05/17/the-things-i-would-like-to-see-in-qgis-what-are-yours/
>>
>> I was wondering if there was someone working on Data Frames and being
>> able to load multiple data frames into the presenter (exactly like ArcGIS).
>> The best use case for this exact feature is to get the extent marker for an
>> area locator in the main map. Something along the lines of a main map with
>> a tiny area map in the corner displaying the location of the current map.
>> You see, I actually do need this feature to exist which would make it quite
>> high on priorities to try to tackle. Also, do you know where I should start
>> looking and what areas of the code tree I would be working in? I am not
>> sure if this should start out as a plugin either since I have a feeling I
>> would end up creating a top level object made up of layers and I am not
>> sure how well that would fit into a plugin like interface. Of course, I
>> don't have any skills programming a plugin for anything anyway but I
>> can re-factor code and design a template for a code review.
>>
>> Also, how do code reviews happen? I would love to get any input on what
>> this sort of thing should look like and what features people would
>> generally want from a "Data Frame" like object and have the class
>> interfaces reviewed before I start tackling the hard work.
>>
>> Thanks all,
>> ~Ben
>>
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>>
>>
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