Re: [udig-devel] DrawFeatureCommand

[Jesse Eichar <jeichar.w@xxxxxxxxx>]

Well the DrawFeatureCommand "should" work.  However becareful in both  
cases that the performance is acceptable.  For big features it can be  
a problem.  Not that I should say anything.

Jesse

On 26-Aug-08, at 1:48 PM, Ugo Taddei wrote:

> 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
> _______________________________________________
> User-friendly Desktop Internet GIS (uDig)
> http://udig.refractions.net
> http://lists.refractions.net/mailman/listinfo/udig-devel