rendered geometries blink sometimes in the VML renderer

[pgiraud]

In IE, if you try to draw a new point in a vector that already contains drawn features, and you put it on the left and/or on the top of existing geometries, the renderer blinks.

A swf video is attached.

Note: in the old vector branch examples, we don't any effect.

[pgiraud]

Video can be seen at  http://bluecarto.free.fr/OL/blink_point.html

[fredj]

After some investigation, I've found that r2959 is the cause of the bug.

Reversing the patch fix the problem but produce the same errors as described in #564

[pgiraud]

current way to draw point in the vml renderer

[pgiraud]

file name self explaining

[pgiraud]

file name self explaining

[pgiraud]

file name self explaining

[pgiraud]

Sorry to try to fix a ticket which milestone was "Future" but this was asked by one of my customers and I think I found something interesting.

I prepared some simple html examples to show the different cases. I hope that they are clear enough. A patch is also attached.

[crschmidt]

Fixing a ticket in the future milestone is *always* welcome -- it's only pulling them back *without* having done any work or indicating that you're going to do work that's a problem ;)

[crschmidt]

Pierre:

If you can get someone (Fred?) to confirm that this fixes things in IE for him, please feel free to comment here, and then it can go in: I can't do a visual inspection, since I don't have IE handy.

[crschmidt]

Bumping from review until I hear back from someone on this: feel free to bump back to review if the answer is yes, or just commit it.

[fredj]

same patch

[fredj]

I confirm that the patch fix this issue without regression (#564).

I'll do some manual testing and commit I no objection.

[fredj]

All examples works with IE6 and IE7

[fredj]

(In [5488]) Remove the 'blinking' phenomenon on IE by setting the display elements to 'absolute'. Thanks to pgiraud for the patch (Closes #965)