Re: [udig-devel] DrawFeatureCommand

[Ugo Taddei <ugo.taddei@xxxxxxxxxxxxxxxxxx>]

Hi Jesse,

I'm trying with the SelectionBoxCommand now and the results are better,
if still strange, nevertheless.

I can "select" the geometry and highlight them, but some geometries
simply won't be drawn with the highlight!

The code is somewhat different:
this.command2 = new SelectionBoxCommand();

LiteShape shp = new LiteShape(
  f.getDefaultGeometry(),
  this.context.getMap().getViewportModel().worldToScreenTransform(),
  false);
this.command2.setShape(shp);

Haven't understood why (some complex and large geoms are drawn, some
simple ones aren't).

Anyway, thanks.

Ugo

Jesse Eichar wrote:
> Hi Ugo...  I've been trying to think what may be the problem and can't
> think of anything obvious.
> 
> I am trying to remember if there are any tricky things with the
> DrawCommands and don't really.  It is possible that the command has
> bugs.  Maybe look into it and let me know if you find anything.
> 
> Jesse
> 
> 
> On 26-Aug-08, at 9:02 AM, Ugo Taddei wrote:
> 
>> Hello,
>>
>> I'm implementing a hovering tool. I basically let the mouse hover over a
>> feature and want to draw it, much like the selection tool (it's called
>> SelectionBoxCommand, right?).
>>
>> Well, the code works all right, but for the way the feature is drawn.
>> Apparently it gets draw either under the found feature or it gets drawn
>> only to be erased by a subsequent update on the found feature (or
>> rather, on its bbox). As a result I see only an edge of the feature
>> (drawn with the symbolizers I provided).
>>
>> Here's what I do:
>>
>> public void mouseHovered(MapMouseEvent e) {
>>
>>        Feature f;
>>        try {
>>            f = findFeature(e);
>>        } catch (Exception ex) {
>>            // TODO Auto-generated catch block
>>            ex.printStackTrace();
>>            return;
>>        }
>>        if (f == null) {
>>            this.command.setValid(false);
>>            this.context.getViewportPane().repaint();
>>            return;
>>        }
>>
>>        this.command = new DrawFeatureCommand(f);
>>        // this.command.setColor(Color.RED);
>>
>>        this.context.getViewportPane().addDrawCommand(this.command);
>>
>>        Symbolizer[] symbs = new Symbolizer[] { new
>> StyleBuilder().createPolygonSymbolizer(Color.RED, Color.BLUE, 10) };
>>        this.command.setSymbolizers(symbs);
>>
>>        this.command.setValid(true);
>>        this.context.sendASyncCommand(this.command);
>>        this.context.getViewportPane().repaint();
>>
>>    }
>>
>> //skip dispose code...
>>
>> findFeature() is adapted code from examples.PickTool.java
>>
>> Am I doing something wrong?
>>
>> I can post the whole class and/or a screenshot, but I don't know if that
>> will get through the list.
>>
>> Cheers,
>>
>> Ugo
>>
>> -- 
>> Ugo Taddei
>>
>> Fraunhofer Institut Intelligente Analyse- und Informationssysteme (FhG
>> IAIS)
>> http://www.iais.fraunhofer.de
>> Department Knowledge Discovery - IAIS.KD -
>> Working Group Spatial Decision Support
>> http://www.iais.fraunhofer.de/kd.html
>> phone  (+49)2241-14-2184    fax    (+49)2241-14-2072
>> Schloss Birlinghoven, D-53754 Sankt Augustin, Germany
>> _______________________________________________
>> User-friendly Desktop Internet GIS (uDig)
>> http://udig.refractions.net
>> http://lists.refractions.net/mailman/listinfo/udig-devel
> 
> _______________________________________________
> User-friendly Desktop Internet GIS (uDig)
> http://udig.refractions.net
> http://lists.refractions.net/mailman/listinfo/udig-devel
> 
> 
> 


-- 
Ugo Taddei

Fraunhofer Institut Intelligente Analyse- und Informationssysteme (FhG IAIS)
http://www.iais.fraunhofer.de
Department Knowledge Discovery - IAIS.KD -
Working Group Spatial Decision Support
http://www.iais.fraunhofer.de/kd.html
phone  (+49)2241-14-2184    fax    (+49)2241-14-2072
Schloss Birlinghoven, D-53754 Sankt Augustin, Germany