[OpenLayers-Trac] [OpenLayers] #1125: Smoother dragging of the map on older computers

[OpenLayers]

#1125: Smoother dragging of the map on older computers
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 Reporter:  haakeyar             |       Owner:  tschaub
     Type:  bug                  |      Status:  new    
 Priority:  minor                |   Milestone:         
Component:  Control.DragFeature  |     Version:  SVN    
 Keywords:  review               |  
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 Not sure whether this should be added as a bug or a new feature.

 When the map is dragged around, a lot of events are sent, and the map is
 updated on every one of them, which takes quite some time. Because of
 this, the map feels slow, especially on old computers. This can be solved
 by creating a short timeout when the event is received, which will update
 the map a little later. Any events inbetween are ignored.

 I created a patch with a possible way to implement this. It passes the
 unit tests and it appears to work well in most browsers (tested in Firefox
 2, Opera 9.5 Beta and IE 6 (IEs for Linux)). If you run the two versions
 side by side, you can really feel a difference.

 The updateMap-method in my patch would probably be more logical as an
 anonymous function in the timeout-call, but then a the function would have
 been created every time the timeout is created instead of only once when
 OSM is loaded.

 I don't know the code structure in OpenLayers very well, so there might be
 better ways to implement it.

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Ticket URL: <http://trac.openlayers.org/ticket/1125>
OpenLayers <http://openlayers.org/>
A free AJAX map viewer