Re: gnome_canvas_item_rotate

[James Henstridge <james daa com au>]

I don't know if that function was ever implemented.  You probably want to
use gnome_canvas_item_affine_relative or gnome_canvas_item_affine_absolute.
For some functions for manipulating affine transformations, see the
libart_lgpl/art_affine.h header, or take a look at
gnome-python/pygnome/gnome/affine.py in CVS.  The affine.py example gives
some simple code for manipulating affine transformations in a fairly
simple to understand way.

James.

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


On Sun, 27 Jun 1999 tim16@polbox.com wrote:

> Hi,
> 
> I am designing a program to arrange/typeset Egyptian hieroglyphs.  I use the 
> GNOME canvas (great piece of work, BTW, it really makes a lot of things
> easier).  Each glyph is represented by a canvas text item.  One of the things
> the program needs to be able to do is flip and rotate the glyphs in 90-degree
> intervals.  Looking through gnome-canvas.h, I see the following function:
> (GNOME-libs 1.0.10 compiled from tarball on RH 5.1)
> 
> /* Rotate an item about a point by the specified number of degrees */
> void gnome_canvas_item_rotate (GnomeCanvasItem *item, double x, double y, double angle);
> 
> yet, when I try to use it, I get the following error:
> 
> gcc `gnome-config --libs glib gtk gnome gnomeui libart` main.o glyph.o line.o -o hiero
> glyph.o: In function `glyph_rotate_cb':
> glyph.o(.text+0x164): undefined reference to `gnome_canvas_item_rotate'
> glyph.o(.text+0x17c): undefined reference to `gnome_canvas_item_rotate'
> collect2: ld returned 1 exit status
> make: *** [all] Error 1
> 
> sure enough, "nm libgnomeui.so | grep canvas_item" yields no
> gnome_canvas_item_rotate.  What happened to this function? Did it disappear?
> If it did, why is it still in the header file? Is there another way to rotate
> an object? I don't understand the affine transforms -- if someone could
> explain them to me I'd be very grateful.
> 
> Profuse apologies if this is a RTFM question. (I did look in the devel-docs
> and at developer.gnome.org)
> 
> Thanks, and keep up the great work on GNOME,
> Tim
> 
> -------------------------------------------
> Tim Gades - tim16@polbox.com                   
> nai eru maruva imbe tye ar naice ilye
> cumne nooressen yassen tye mauyina vantien.         
> -------------------------------------------
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