The IupGLCanvasBox was designed to be a background drawing while the
controls are drawn on the foreground. So I think that one possible approach
is to use this glsubcanvas with zorder=top.
In the error it seems that you are trying to set a non function as a
callback. You should check that.
Best,
Scuri
Em 24/07/2017 19:31, "Milind Gupta" <[email protected]> escreveu:
I tried placing a glsubcanvas over the whole canvas box and tried to do all
the drawing in the action callback of the subcanvas but I get this error
then:
[string "iuplua.lua"]:139: bad argument #3 to 'SetCallback' (Invalid
function when set callback.)
stack traceback:
[C]: in function 'iuplua.SetCallback'
[string "iuplua.lua"]:139: in metamethod '__newindex'
In my program it points to the link where the action callback function
starts.
On Mon, Jul 24, 2017 at 3:16 PM, Milind Gupta <[email protected]>
wrote:
> Hi,
> I notice that if I draw anything on the glcanvasbox it is always
> behind the glcontrols like gllabel, etc. Is there a way for me to draw and
> be on top of those controls?
>
> Thanks,
> Milind
>
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