On 2020-09-30 13:54, Ian MacArthur wrote:
> However, the key here is that you do not need to call Fl::run() at all, if you only want to drive the GUI from your main thread: all you have to do is call Fl::wait(0); every now and then (say every 100ms or so if you just want to update the GUI but not handle user input...)
	I believe we have an example of this in examples/progress-simple.cxx, which shows:

[..]
    // Computation loop needing an updating progress indicator..
    for ( int t=1; t<=500; t++ ) {
        progress->value(t/500.0);              // update progress bar with 0.0 ~ 1.0 value
        char percent[10];
        sprintf(percent, "%d%%", int((t/500.0)*100.0));
        progress->label(percent);              // update progress bar's label
        Fl::check();                           // give fltk some cpu to update the screen
        usleep(1000);                          // <-- your compute intensive stuff goes here
    }
[..]

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