> i tried what thomas suggested and it worked but its still cpu intensive.. how > can i make dragging an element more efficient? i read that i can use > overlays but when i looked at the cpu usage, its almost the same as updating > the dom... any suggestions? Dragging complex elements can be a pain - the usage CPU usage is probably not due to efficiency reasons but due to the likely complexity present in the dragged object.
Have you considered implementing canvas object drag? Suggestion was to get the object's bounding box and use this rectangle to set the new object location. Once the rectangle was dropped, a single DOM operation would relocate the original object into position. :-) This already seen in the commonly seen "Show window contents while dragging" system preference (this specific one is present in Windows): if enabled, CPU usage while dragging windows is also somehow high... An even better approach would be using a wireframe-like [1] approach, that is, collecting (through cloning?) line data and setting a simple stroke for the whole line set. Avoiding potentially used filters, more complex stroke and fill will probably result in a noticeable performance boost! ;-) The only caveat which occurs to me is the initial setup of drag operation, which may cause all this to be unfeasible... But I believe the idea worths the effort! :-) Batik developers: if still not present in Batik framework, implementing a few utility methods for this would surely be great for these kind of operations! ;-) (Should this be but somewhere in the Wiki [2] as a possible idea for contributions? Is there a recommended location, within the Wiki or not, for these kind of thoughts?) Hope this helps, Helder Magalhães [1] http://en.wikipedia.org/wiki/Wire_frame_model [2] http://wiki.apache.org/xmlgraphics-batik/ --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
