Hello Fernand,
On Friday 20 March 2009, 11:47, Fernand Vanrie wrote:
> Paolo ,
>
> Thanks for tyour quick Replay, but the problem must be elsware:
> its the codeines before my drawings who are giving trouble
> oImagcontrol.visible(false)
> ..some other actions
> oImagcontrol.visible((true)
>
> When i let the ImageControl visible, then the line is drawn
> when changing from invisible to visible no more drawing...
> same effect witht enabling and setting the dimensions to 0 .
> I try further with the paintlistener or let the imagecontrol visible al
> the time :-)
as Paolo told you, the things you do with the image control trigger a repaint,
that is, what you have drawn must be redrawn (by you, not by the image control
itself).
As a simple example, just draw a line a dialog, then move the dialog so that
part of the line is not visible because it's off-screen. When you move the
dialog back to make it fully visible, that part of the line has disapear, you
must redraw it.
Also if you add a paint listener you'll see when and how many repaint event
take place.
Regards
--
Ariel Constenla-Haile
La Plata, Argentina
"Aus der Kriegsschule des Lebens
- Was mich nicht umbringt,
macht mich härter."
Nietzsche Götzendämmerung, Sprüche und Pfeile, 8.
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