[Gambas-user] Can not draw outside of draw enent handler

[Demosthenes Koptsis]

On Sun, 2011-03-27 at 17:00 +0200, Benoît Minisini wrote:
> > 
> > i try to make a similar example from this page
> > http://gambasdoc.org/help/comp/gb.qt4/draw/line?v3
> > 
> > in this page it says
> > 
> > Draw.Begin(ME) where ME is a form.
> > 
> > i get this error in my project for
> > 
> > Draw.Begin(drawArea) where drawArea is the name of a DrawingArea object.
> > 
> > Where is the bug? The name "drawArea" ?
> > 
> 
> Now, in Gambas 3, you just cannot draw outside of the Draw event handler 
> anymore. That's all. Consequently, you cannot draw on a form too, as a form 
> has no Draw event handler.
> 
> Regards,
> 

ok i found the bug in my app.

i had to set Cached property to TRUE.

after that i can write code as:

----------------------
Public Sub btnLine_Click()

iAct = 1
Draw.Begin(drawArea)
drawArea_Draw()
Draw.End

End


Public Sub btnPolygon_Click()

iAct = 2
Draw.Begin(drawArea)
drawArea_Draw()
Draw.End


End


Public Sub drawArea_Draw()

Select Case iAct
  Case 1 'draw line

    SetValues()

    Draw.Line(55, 47, 289, 367)


  Case 2

   SetValues()

   Draw.Polygon(aPolygon)

 
End Select

End
--------------------------


-- 
Regards,
Demosthenes Koptsis.