Re: Stack order and raise_

[Brandon Lewis <dotsony gmail com>]

Alessandro Dentella wrote:

I believe you're complicating matters by using groups. I don't think you 
can raise the child of a group to a higher drawing order than the parent 
group itself (think depth-first traversal of a tree).

I'm not sure why you have those two groups. Are they there for a reason? 
Either add both objects directly to the root group, or raise one group 
above the other, or place both objects in the same group.
> Hi,
>
> I have problems with raise_(None). From the docs I read:
>
>   def raise_(above)
>   above : the item to raise item above, or NULL to raise item 
>             to the top of the stack.
>
>
> if I use None, nothing happens, the yellow rectangle of the example below
> doesn't raise it's position. 
>
> If I set raise_(r2) I get goocanvas critical error:
>
>   GooCanvas-CRITICAL **: goo_canvas_item_raise: assertion `above_pos != -1' failed
>
>
> The code I'm using is::
>
>    import gtk
>    import goocanvas as goo
>
>    w = gtk.Window()
>    c = goo.Canvas()
>    w.add(c)
>
>    root = c.get_root_item()
>
>    g1 = goo.Group(parent=root)
>    g2 = goo.Group(parent=root)
>
>    r1 = goo.Rect(parent=g1, width=100, height=100,
> 		 fill_color='gray80', stroke_color='gray80')
>    r2 = goo.Rect(parent=g2, width=100, height=100,
> 		 fill_color='gray90', stroke_color='gray90', x=100)
>
>    r1_1 = goo.Rect(parent=g1, width=100, height=100, fill_color='yellow', x=50)
>    #r1_1.raise_(None)
>    r1_1.raise_(r2)
>
>    w.resize(220,120)
>    w.show_all()
>
>    gtk.main()
>
> Is there some limit that is not written in the docs?
>
> sandro
>
>