> I would like to create a callback timer so that I get notified after a
> specified number of seconds/minutes. I would like to, for
> example, be able
> to display a window/dialog after that. Or, for example, I
> would like that
> window dialog to die after a specified number of
> seconds/minutes. Is there
> any such facility in FLTK? A code example will be just wonderful.
OK: here's the example - this shows how to add, repeat and remove timer
callbacks.
I think that covers most of the bases...
--------------------------
// fltk-config --compile timer_demo.cxx
#include <FL/Fl.H>
#include <FL/Fl_Double_Window.H>
#include <FL/Fl_Button.H>
#include <FL/Fl_Value_Output.H>
#define WIN_DELAY 10.0
static Fl_Double_Window *main_win = (Fl_Double_Window *)0;
static Fl_Double_Window *secnd_win = (Fl_Double_Window *)0;
static Fl_Value_Output *ticker = (Fl_Value_Output*)0;
static int tick = (int)WIN_DELAY;
static void cb_Quit(Fl_Button*, void*) {
if(main_win) main_win->hide();
if(secnd_win) secnd_win->hide();
}
static void dismiss_scnd_win(void *) {
if(secnd_win) secnd_win->hide();
}
static void cancel_timer(void *) {
if(secnd_win) secnd_win->hide();
Fl::remove_timeout(dismiss_scnd_win);
tick = 0;
}
static void delay_show_win(void *) {
if(secnd_win) {
secnd_win->show();
tick = (int)WIN_DELAY;
// dismiss scnd win after delay
Fl::add_timeout(WIN_DELAY, dismiss_scnd_win);
}
}
static void tick_count(void *) {
if(tick) {
tick = tick - 1;
ticker->value(tick);
}
Fl::repeat_timeout(1.0, tick_count);
}
int main(int argc, char **argv) {
main_win = new Fl_Double_Window(100, 100, 439, 321, "Main win");
main_win->begin();
Fl_Button* o = new Fl_Button(345, 265, 80, 35, "Quit");
o->callback((Fl_Callback*)cb_Quit);
ticker = new Fl_Value_Output(120, 20, 30, 30, "Tick");
ticker->value(tick);
main_win->end();
main_win->show(argc, argv);
secnd_win = new Fl_Double_Window(550, 100, 439, 321, "Delayed Win");
secnd_win->begin();
secnd_win->callback((Fl_Callback*)cancel_timer);
secnd_win->end();
// show scnd win after delay
Fl::add_timeout(WIN_DELAY, delay_show_win);
// count the ticks down
Fl::add_timeout(1.0, tick_count);
return Fl::run();
} // main
/* end of file */
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