[mapguide-trac] #17: AJAX viewer and IE - Images in tooltip

[MapGuide Open Source]

#17: AJAX viewer and IE - Images in tooltip
--------------------------+-------------------------------------------------
 Reporter:  Andy Morsell  |         Owner:  chrisclaydon
     Type:  defect        |        Status:  new         
 Priority:  high          |     Milestone:              
Component:  AJAX Viewer   |       Version:              
 Severity:  critical      |    Resolution:              
 Keywords:                |   External_id:  922152      
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Comment (by chrisclaydon):

 In Internet Explorer, under some circumstances, an onmousemove event is
 issued when the tooltip is displayed, even though the mouse has not
 actually moved. This causes the tooltip to be closed, and a new one is
 opened shortly afterwards. That causes a new onmousemove event, and the
 process repeats ad infinitum.

 To fix the problem, a check can be added to the beginning of the
 !OnMouseMove() method defined in ajaxmappane.templ to verify that the
 mouse position really has changed before proceeding. For the bogus
 onmousemove events generated by IE, the !OnMouseMove() method will then
 return immediately, without closing the current tooltip. This solves the
 problem.

 The change involves changing this piece of code:

 {{{
 function OnMouseMove(e)
 {
     var x = e.clientX - mapPosX;
     var y = e.clientY;

     lastposx = x; lastposy = y;
 }}}

 to this:

 {{{
 function OnMouseMove(e)
 {
     var x = e.clientX - mapPosX;
     var y = e.clientY;

     if(x == lastposx && y == lastposy)
     {
         return false;
     }
     lastposx = x; lastposy = y;
 }}}

-- 
Ticket URL: <http://trac.osgeo.org/mapguide/ticket/17#comment:2>
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