Re: [Goocanvas-devel] X,Y won't change

[Luka N. <luk...@gm...>]

I'm using goo_canvas_item_translate (group, new_x - drag_x, new_y -
drag_y);

As I saw it in some example in the goocanvas sources. drag_x/y being the
coordinates at the moment of the click and new_x/y the coordinates of
the move event.

I can directly change the XY property of the rectangle but that would
move only the rect and I have some other items in the parent group that
I would like to move. How can I solve this?

Greets,
Luka

Dne 06.08.2007 (pon) ob 10:38 +0100 je Damon Chaplin zapisal(a):
> On Mon, 2007-08-06 at 02:14 +0200, Luka Napotnik wrote:
> > Hi.
> > 
> > I have this move callback to a rectangle:
> > =======================
> > gboolean rect_move(GooCanvasItem *item,
> >                       GooCanvasItem *target_item,
> >                       GdkEventMotion *e,
> >                       gpointer data)
> > {
> > 	gdouble x, y;
> > 
> > 	// ... move the item
> > 	// ...
> > 	g_object_get(item, "x", &x, "y", &y, NULL);
> > 	g_print("X: %f Y: %f\n", x, y);
> > 	return TRUE;
> > }
> > 
> > The problem is it constantly prints out X: 100.0 Y: 100.0 there is no
> > change if I move the item. What's wrong here?
> 
> How are you moving the item?
> 
> I guess you're probably confusing the item's transformation matrix with
> it's "x" and "y" properties. They are completely separate - if you
> change the transformation matrix it doesn't change the "x" and "y".
> 
> Damon
> 
>