Re: Question on GnomeCanvasImage

[James Henstridge <james daa com au>]

you can't use arbitrary affine transformations on the non antialiased
canvas.  You should be able to do translations for all items and scalings
for most items though.

James.

--
Email: james@daa.com.au
WWW:   http://www.daa.com.au/~james/


On Tue, 30 Nov 1999, Loban Amaan Rahman wrote:
> Hmm, I just figured something out. When I use the non-aa mode of GnomeCanvas
> (by calling gnome_canvas_new()), applying a rotation to the canvas item
> results in NOT a rotated canvas item, but rather the canvas item being scaled
> down and translated to one side. This is why I used aa mode (by calling
> gnome_canvas_new_aa()) instead. BUT, even though the canvas item gets
> rotated properly, the "area" over which my mouse can cause the canvas item
> to emit an event signal got transformed the same way it did in non-aa mode.
> (ie. the event area got scaled down and translated). And what happens is
> that after a couple of said transformations, the area gets translated
> completely out of the scrollable region of the canvas - hence it no longer
> generates any event signals.
> 
> Is this a bug? Or is my implementation wrong?
> 
> Thanx in advance.
> 
> 
> |      LOBAN AMAAN RAHMAN  <-- anagram of -->   AHA! AN ABNORMAL MAN!      |
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