[Dojo-interest] Dojo 0.41 in IE : gfx images move when another gfx shape is drawn outside of the surface area.

[Aaron Staves]

This might be hard to explain, for starters lets say i have a gfx image at
x:0, y:0 (640x480) and on gfx surface (640px x 480px).  From there, any time
i draw a shape that exceeds the boundaries of the surface, say a line with
{x1:0, y1:0, x2:640, y2:480, width:100} or a circle {cx:200, cy:200, r:
400}.  This seems to 'cause the bounding area of the image (previously
640x480) to extend beyond (or behind) the viewable surface.  So now when the
image redraws at 0,0, the 0,0 point of reference has changed from where it
was originally.

I realize this is kind of hard to picture, so i've made a demo that can be
found here : http://aaron.schoolinsummertime.com/gfx/line.html .  Basically,
it should load a line that is overlayed on top of an image.  Now if you
click "toggle line" that will 'cause the line to get wider, and you can see
the image move.  When you click "toggle line" again, it will 'cause the line
to get smaller, and the image will return to it's previous spot.  Also keep
in mind, this only seems to be a problem with the VML side of gfx, the SVG
tests seem to work just fine; so this will only occur under IE7 or IE6.

I'm just wondering if there is something i'm missing when creating images on
the surface, or if this is in fact a bug in dojo.gfx.  Any insight would be
greatly appreciated! thanks!

aaron
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