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Re: [udig-dev] Starting point
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Many thanks for that, not had a chance to have a look yet but will do soon.
I do have one more question. I'm currently looking at getting a maven build up and going but become stuck without a p2 repository for uDig. Does anyone else here use maven to build their uDig app? Any recommendations on how to do it?
Thanks again, Vic
-----Original Message-----
From: udig-dev-bounces@xxxxxxxxxxxxxxxx [mailto:udig-dev-bounces@xxxxxxxxxxxxxxxx] On Behalf Of Emily Gouge
Sent: 30 May 2014 21:24
To: uDig project developer discussion
Subject: Re: [udig-dev] Starting point
You might have a look at the BBoxSelectionCommand, which looks like it calls Map.select().
Also you might try the BasicFeatureRender and RenderContextImpl classes.
In the BasicFeatureRender I saw this comment:
// Original Query provided by Layer.getFilter() as adjusted by selection and edit filter Query query = getContext().getFeatureQuery();
I think this is where the filter is retrieved from the layer.
Hopefully this is helpful. Its been a long time since I've looked at the udig rendering stuff.
Emily
On 30/05/2014 6:37 AM, Kirk, Victor wrote:
> Thanks again. I see that the layer has an operation to get a query
> for selected features.
>
> Unfortunately it is actually selecting the feature in the first place
> that I'm stuck on. I've poked around the stack in the debugger during
> the selection process but seem to be missing how the decision for a
> feature being selected is based. The feature geometries are points,
> when I'm zoomed in I'm rendering them much larger and actually offset
> from their actual location and I'd actually like the user to be able
> to move them to somewhere they'd prefer but be able to select them by
> click on the rendered image.
>
> Now that the image rendered on the screen does not match the feature
> bounds the only way to select the feature is to click on where the
> default feature renderer would have displayed them. I've tried
> updating the feature bounds when I draw them to match the render but
> they seem to revert back the next time it is drawn.
>
> I suppose I could handle the selection myself but seems a bit of a
> hack.
>
> From: udig-dev-bounces@xxxxxxxxxxxxxxxx
> [mailto:udig-dev-bounces@xxxxxxxxxxxxxxxx] On Behalf Of Jody Garnett
> Sent: 30 May 2014 13:35 To: uDig project developer discussion
> Subject: Re: [udig-dev] Starting point
>
> That is great you are making progress.
>
> I think the selection tools update a "filter" on the layer data
> structure. Your renderer can use this information to test each feature
> it is drawing, and thus show rendered features differently.
>
> There are a few helper methods around to grab just the selected
> features, or just the unselected features. Cannot remember the details
> off the top of my head.
>
> Stop the code in the debugger and have a look at how the layer data
> structure changes when you have selected content or not. You can also
> change the selection by hand using the table view in order to
> experiment.
>
>
> Jody Garnett
>
> On Fri, May 30, 2014 at 8:48 PM, Kirk, Victor
> <VICTOR.KIRK@xxxxxxxxx<mailto:VICTOR.KIRK@xxxxxxxxx>> wrote: Thanks
> for getting back to me. I found the Renderer extension point and
> implemented a renderer for my layer, I quite happy now I can render on
> the map. I did see the glasspane and sounds exactly what I would have
> liked to do but I'd have had to implement a lot of functionality, some
> of it duplicating what the map currently provides.
>
> However I still have one remaining piece of the puzzle to complete my
> prototype. Now I have my renderer I've lost the ability to select the
> features (data is coming from a WFS source), I can't see any way to
> establish a relationship between what I've drawn and the selection,
> presumably there is some mechanism to join the two up. I've looked at
> the code for the other renderers and don't see anything obvious.
> I don't suppose anyone could point me to what to look at?
>
> Regards, Vic
>
>
> From:
> udig-dev-bounces@xxxxxxxxxxxxxxxx<mailto:udig-dev-bounces@locationtech
> .org>
> [mailto:udig-dev-bounces@xxxxxxxxxxxxxxxx<mailto:udig-dev-bounces@loca
> tiontech.org>] On Behalf Of Jody Garnett Sent: 29 May 2014 22:52 To:
> uDig project developer discussion Subject: Re: [udig-dev] Starting
> point
>
> We are a bit stuck in that the useful uDig tutorials are part iof the
> (commercial) training course. The source code is there, and I made
> some notes about each workbook.
>
> So you have gone through the first day of content :)
>
> Sounds like you could use the glass pane (which was created to do
> dynamic overlays for control room software) or a custom renderer (
> created to directly draw business objects ).
>
> Chech out the custom tool tutorial, it uses a tool to create objects (
> on the layer blackboard) and a renderer to draw them.
>
> On Thursday, May 29, 2014, Kirk, Victor
> <VICTOR.KIRK@xxxxxxxxx<mailto:VICTOR.KIRK@xxxxxxxxx>> wrote: Hi, I'm
> looking at udig as a possible replacement for a bespoke mapping
> framework but a bit confused on how to get started.
>
> I've gone through the tutorials on getting started and created the
> custom app, feature and workbench. Now I'm struggling to get to grips
> on how to start my prototype.
>
> My first sticking point is how to render objects on the map. I have
> static data for a network and equipment positions available from a
> geoserver and those are displayed no problem. However I'd like to
> handle the rendering of the equipment programmatically when an
> operator zooms in to a particular level or if they double click/via a
> right click context command when the feature when zoomed out. The
> reason I what to do this is to show dynamic data obtained from a
> different source and the rendering is far too complex for styling.
>
> Are there any examples that I've missed for doing this?
>
> Kind Regards,
>
> Vic
>
>
>
>
> [Cubic Transportation Systems]<http://cts.cubic.com/>
>
> Victor Kirk Lead Developer Cubic Transportation Systems (ITMS) Ltd.
> Phone: +44 1642 636 894<tel:%2B44%201642%20636%20894> Email:
> victor.kirk@xxxxxxxxx<mailto:victor.kirk@xxxxxxxxx>
> cts.cubic.com<http://cts.cubic.com/>
>
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