re,

thanks, but :-)

> > Can someone give me a hint about how to clear a TkCanvas?
> Under canvas, we find: pathName delete ? tagOrId tagOrId...
> and indeed TkCanvas.delete() exists.
> iirc, passing it '*' (wildcard interpreted by Tk) selects all objects
> in the canvas, which will wipe your canvas clean.

I have a Class "Draw". In this class I have an instance 
@canvas=TkCanvas(parent) (copied from example in "Programming Ruby").

In the @canvas I draw crosses:
        x = here.x
        y = here.y
        line = TkcLine.new(@canvas, x-2,   y, x+2, y  )
        line.fill 'green'
        line = TkcLine.new(@canvas, x  , y-2, x  , y+2)
        line.fill 'green'

when calling @canvas.delete("*") nothing changes on screen.
But I have a zoom-Button, and it does not look good when I draw the crosses 
over the old crosses..

> Good luck!

:-) I think I'll need it.
Probably I should focus on Qt bindings...

tk.

-- 
+ Tjabo Kloppenburg + taponet.de + de,en +