Re: How to move a GnomeCanvasGroup?

[Lauris Kaplinski <lauris helixcode com>]

You can always mess with affine transformations directly:

gdouble x, y;
gdouble affine[6];
GnomeCanvasItem * citem = your_item;

art_affine_translate (affine, x, y);
gnome_canvas_item_affine_absolute (citem, affine);

Regards,
Lauris Kaplinski

On Thu, 27 Jul 2000, Arturo Tena wrote:

> Hello!
> 
> I want to move a GnomeCanvasGroup to the coordenates (x,y), but using the
> following code doesn't rerender its children on the canvas:
> 
> 
> GnomeCanvasItem *citem; /* This is a GnomeCanvasGroup */
> double x, y;
> /* ... */
> gnome_canvas_item_set (citem, "x", x, "y", y, NULL);
> 
> 
> (I have had used gtk_object_set, but I remember that GnomeCanvasItem doesn't
> watch for argument changes, which I was told is a bug that will be corrected
> soon). I have to use the following code instead:
> 
> 
> GnomeCanvasItem *citem; /* This is a GnomeCanvasGroup */
> double x, y;
> double old_x, old_y;
> /* ... */
> gtk_object_get (citem, "x", &old_x, "y", &old_y, NULL);
> gnome_canvas_item_move (citem, -old_x, -old_y);
> gnome_canvas_item_move (citem, x, y);
> 
> 
> My questions are:
> 
> 1. Is this a bug or a feature?
> 2. Is there any chance to get a gnome_canvas_item_move_absolute call, instead
> the relative gnome_canvas_item_move?