[udig-devel] Adding images or icons on a layer and detect them

[Jody Garnett]

Morning Frederic, how to deal with icons on a map is about our 3rd most 
common request (the other two we have captured as tutorials; how to make 
a tool and how to make an application).

You are already on the right track using a MapGraphic, using a tools to 
interact with the mouse is the way to go. I am not sure off the top of 
my head how to add to the existing background tools; the answer may be 
that "we don't build it until someone asks". I imagine we need an 
extension point to slurp up background tools if one is not already 
available.

Can you tell me how the initial uDig background tools are acquired?
Jody

Frederic Renard wrote:
>
> Hi all,
>
>  
>
> I'm new to RCP and uDIG.
>
> I want to add images or icons on a layer (dynamicaly), and when the 
> mouse fly over this image (or icon) I want to display informations 
> about this icon.
>
> I already created a extention /to 
> net.refractions.udig.mapgraphics.mapgraphic/  plugin who received data 
> dynamicaly and draw a circle at a position.
>
> I add a /backgroundtool/ to/ net.refractions.udig.project.ui.tool/. 
> This backgroundtool is responsible  to get mouse position , check if 
> this is a particular position (exactely icon position)  , and if it 
> is, display a message.
>
> But my  backgroundtool 'overwrite' the initial uDig backgroundtools 
> (/net.refractions.udig.tools.internal.ScrollZoom , 
> net.refractions.udig.tools.internal.CursorPosition and 
> net.refractions.udig.tools.internal.PanMiddleMouse/), .. and don't work.
>
>  
>
> My questions are :
>
> - Is it possible to add a background tool to existing ones ? ( and if 
> the response is 'yes': how? )
>
> - is it the right method to dynamicaly extract mouse position and 
> doing some actions ?
>
>  
>
> Best regards,
>
>  
>
> Frederick.
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> User-friendly Desktop Internet GIS (uDig)
> http://udig.refractions.net
> http://lists.refractions.net/mailman/listinfo/udig-devel
>