Hi Age,
Age Bosma <[email protected]> wrote on 03/09/2009 06:28:45 AM:
> This works fine. The event gets triggered as it should. The event is
> used to drag an element. When it gets triggered I'm adding two new
> events to the same element. These get triggered nicely as well but I
> can't get them removed anyone.
You need to pass the same object as the second argument to
removeEventListener as you passed to addEventListener. I
suspect you might be best off passing 'this' for all of the objects
(and setting startX/Y on this on mousedown).
> ((EventTarget)targetElement).addEventListener("mousemove", new
DeviceHandler(startX, startY), false);
> ((EventTarget)targetElement).addEventListener("mouseup", new
DeviceHandler(), false);
> }
> else if (eventType.equals("mousemove")) {
> double x = position.getX() - startX;
> double y = position.getY() - startY;
>
> System.out.println("Translate: x=" + x + ", y=" + y);
>
> targetElement.setAttributeNS(null, "transform", "translate("
> + x + "," + y + ")");
> targetElement.setAttributeNS(null, "stroke", "rgb(255,0,0)");
> }
> else if (eventType.equals("mouseup")) {
> ((EventTarget)targetElement).removeEventListener("mousemove",
> new DeviceHandler(), false);
> ((EventTarget)targetElement).removeEventListener("mouseup",
> new DeviceHandler(), false);
> }
> }
>
> private SVGElement targetElement = null;
> private MouseEvent event;
> private float startX = 0;
> private float startY = 0;
> private SVGPoint position;
> }
>
-----------------------------------------------------------------------------------
>
> Intended bahaviour: mousedown+ mousemove = drag. It should remove the
> 'mousemove' and 'mouseup' again when the button is let go.
> I tried replacing 'new DeviceHandler()' with 'this' when removing the
> events but 'mousemove' nor 'mouseup' gets removed, they remain getting
> triggered. As a result you can't stop dragging the element.
> As I test I even added removeEventListener right after a
> addEventListener but the event does not get removed, it keeps getting
> trigered.
>
> I'm I doing something completely wrong here?
>
> Yours,
>
> Age
>
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