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

[Aaron Staves]

ah, that's unfortunate.  I've read a few threads about the ASVG plugin in
IE, is there currently any way to get IE7 (or 6) to correctly use that
plugin via dojo?  It seems that suport for that was taken out of dojo around
5/9/2006 or at least out of the bootloader?  or maybe ASVG was never
supported at all?

I guess what i'm asking is - is there any way i can get dojo.gfx to
correctly utilize the ASVG plugin?  I've tried forcing gfx to use svg IE7
fails upon creation.  I'm just wondering if this would be a huge change to
the code or if it would just involve changing the creation of the actual svg
surface.  Also thanks for your quick reply Eugene!

aaron


On 2/7/07, Eugene Lazutkin <eugene.lazutkin at gmail.com> wrote:
>
> This is a well-known problem. SVG clips everything on its "surface"
> boundary, while VML draws everything happily outside of a "surface"
> dynamically modifying its geometry. There is no work-around for that,
> and I don't think MS is going to fix VML any time soon --- from IE6 to
> IE7 we saw a reduction in supported features. I suggest to do it in the
> application layer, e.g., don't allow users to draw shapes outside of a
> surface. It is a certifiable P.I.T.A., but it works.
>
> Thanks,
>
> Eugene
>
> Aaron Staves wrote:
> > 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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