On 1/3/06, Christoph Bersch <[EMAIL PROTECTED]> wrote:
> I want to write a program, that draws something in a DrawingArea, and calls a
> function after _showing_ the changes in the DrawingArea:
>
> 1) call function draw_something()
> 2) show the changes
> 3) call a function measure()
> 4) return to step 1)
I would use a timeout. Set it to run every 20ms (or whatever interval
you want), and do something like:
static int number_of_ticks = 0;
my_timeout_callback( ...
{
number_of_ticks += 1;
if( number_of_ticks & 1 )
// queue a redraw of our drawingarea
gtk_widget_queue_draw( ..
else
measure();
return( TRUE );
}
then in your expose callback use number_of_ticks to decide what to draw.
expose_callback( ..
{
for( int i = 0; i < number_of_ticks / 100 + 1; i++ )
draw_square( i );
}
There's no guarantee that the draw will occur before the measure, but
it probably will for most reasonable machines. But of course that's
always true for X.
John
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