> Andres,
>
> I have tried a dozen ways to implement a "glasspane" over the last few
> days.
> All attempts have been unsuccessful.
> I don't know what is wrong. I don't know what else to try.
>
> In my svg file, I added this rectangle:
>
> <g id="top">
> <g transform="translate(50,30)" style="fill:none;
> mouseevents:fill">
> <rect x="0" y="0" width="400" style="stroke:none;"
> height="400" />
> </g>
>
> In my (Java) code, I register eventlisteners with the this "top"
> element:
>
> public void registerRootListener() {
> Element elt = theDocument.getElementById("top");
>
> if (elt!= null){
> EventTarget t = (EventTarget)elt;
> try{
> // Add mouse event listeners
> t.addEventListener("click", new OnRootClickAction(),
> false);
> t.addEventListener("mouseenter", new
> OnRootMouseEnterAction(),false);
> }
> catch (Exception e){
> System.out.println("Exception in
> registerRootListener()");
> e.printStackTrace();
> }
> }else{
> System.out.println("registerRootListener FAILED");
> }
> }
>
> public class OnRootClickAction implements EventListener {
> public void handleEvent(Event evt) {
> System.out.println("ROOT Click ACTION.");
> }
> }
>
> public class OnRootMouseEnterAction implements EventListener {
> public void handleEvent(Event evt) {
> System.out.println("ROOT MouseEnter ACTION.");
> }
> }
>
>
>
>
>
> Andres Toussaint
> <andres@onemileup
> .com>
> To
>
>
[hidden email]
> 05/12/2005 11:17
> cc
> AM
>
> Subject
> Re: Detect "whitespace" click on
> Please respond to JSVGCanvas?
> batik-users@xmlgr
> aphics.apache.org
>
>
>
>
>
>
>
>
> In this case, you should add a "Glasspane" object as your background
> and attach a mouseclick listener to it.
>
> Since your "Rectangle Elements" will be on top of this "Background
> glasspane (fill:none, mouseevents:fill)" the mouse event only applies
> to the topmost visible element.
>
> So your Background will react only if the click is over it, and it will
> not react if the click is over any other element. I use this approach
> to provide a "De-select" option.
>
> Andres.
>
>
> On May 11, 2005, at 9:57 AM,
[hidden email] wrote:
>
>> I have a JSVGCanvas (with a DOM representaion) of an imported SVG
>> file.
>> This file basically contains a plain white grid with several
>> rectangles in
>> it.
>> I need to detect if the user has clicked in a "whitespace" area (ie.
>> not in
>> a rectangle "Element").
>>
>> I have a Event listener on each rectangle, so I can detect a "click"
>> within
>> the rectangle itself.
>> Attempts to put an Event listener on the "whole document" like this
>> have
>> failed:
>>
>> Element elt = theDocument.getDocumentElement();
>> EventTarget t = (EventTarget)elt;
>> t.addEventListener("click", new WhiteSpaceClickAction(),
>> false);
>>
>> I can detect ALL mouse events on the JSVGCanvas itself using Mouse
>> Listeners,
>> (ie. MouseListener, MouseMotionListener) but this still doesn't
>> help,
>> since I can't tell if the
>> X, Y coordinates are "in" a rectangle or not.
>>
>> Is there a "standard" way to do this?
>> Is there an API call to query if a coordinate is within an Element?
>>
>> Thanks for any help.
>> Ted
>>
>>
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