Hi,
the behaviour you report makes sense. Since you're calling
sleep(), your process really is sleeping, thus also not drawing
the line you just drew ... you probably want to use a timeout
callback for this, as this will return control to gtk ... your function
could look like this
int status = 0;
int mydraw ()
{
if (status == 0)
drawline (red, ...)
if (status == 1)
drawline (green, ...)
status ++;
return 0;
}
If you call this function through a timeout callback, it should work ...
Greetings
--> R
On Tue, 21 Dec 1999, Jiang XU wrote:
> I try to paint on the GtkWidget->window .
> For example, I have a GtkWindow called "mainwindow", I try to draw on
> its GdkWindow that is mainwindow->window.
> I try to draw a red line, then after 1 second I will draw a green line
> at the same place.
>
> so the code will be look like:
>
> drawline(red, mainwindow->window,...);
> sleep(1);
> drawline(green, mainwindow->window,..);
>
> But what happened is: each time it only shows up the green line, never
> see the red line, even didnot see the screen reflesh.
>
> I know I can put the code in the configure event call back function of
> the mainwindow. But I donot want to reflesh the whole screen, so I
> didn't send out the configure_event signal .
>
> I wonder whether there is a way to instantly draw on the GdkWIndow
> (which is GtkWidget->window), and show on the screen immediately!!
>
> I appreciate any Help! If someone knows, Please teach me ASAP,
>
> Thanks very much
>
> Jiang
>
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