[Mapbender_dev] Raphaeljs not bubbling

[Armin Retterath]

maybe an alternative?

http://jsxgraph.uni-bayreuth.de/wp/

Am Montag 07 Juni 2010 10:57:57 schrieb Karim Malhas:
> Dear List,
>
> I am trying to modify the loadkmlgeorss module, which uses the Marker
> class, to respond to click events to display a balloon popup.
>
> If the Raphaeljs library is included this doesn't seem possible right
> now.
>
> The Problem as I understand it:
>
> Each marker instantiates it's own 'canvas' - in Raphael this means a new
> <svg> element is added to the DOM.
> So if multiple markers are present, multiple <svg> appear stacked above
> each other.
> The problem is, that events don't seem to come through the topmost
> svg element, meaning that only a click on the marker that was add last
> will bring the desired result.
>
> Possible solutions:
>
> - Create a global canvas element.
>   If all elements are in a single canvas, event propagation works
>   however because canvas.clear() is called a couple of times
>   in the code, a global canvas doesn't work without changes.
>   This could be modifyed to grouping elements using 'canvas.set()',
>   and set.remove().
>   I am not 100% sure how feasable that is, though.
>
> - Create a common canvas element for the markers only
>   drawback: the markers will work, but it can' t be used with any other
>   modules that need a canvas
>
> ideas?
>
> Regards,
> Karim
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Armin Retterath

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