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Android: Improved event handling to handle all pending events before redrawing the interface.

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git-svn-id: file:///fltk/svn/fltk/branches/branch-1.4@12799 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
This commit is contained in:
Matthias Melcher 2018-03-25 16:34:40 +00:00
parent 0e765c6cd8
commit 832377fc21
1 changed files with 19 additions and 11 deletions
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30
src/drivers/Android/Fl_Android_Screen_Driver.cxx
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@ -304,6 +304,7 @@ int Fl_Android_Screen_Driver::handle_mouse_event(AInputQueue *queue, AInputEvent
*/
int Fl_Android_Screen_Driver::handle_queued_events(double time_to_wait)
{
AInputQueue *queue = Fl_Android_Application::input_event_queue();
int ret = 0;
// Read all pending events.
int ident;
@ -311,8 +312,8 @@ int Fl_Android_Screen_Driver::handle_queued_events(double time_to_wait)
int delay_millis = time_to_wait*1000;
bool done = false;
// while (!done) {
int delay = Fl::damage() ? 0 : delay_millis;
int delay = Fl::damage() ? 0 : delay_millis;
while (!done) {
ident = ALooper_pollOnce(delay, nullptr, &events, nullptr);
switch (ident) {
case Fl_Android_Application::LOOPER_ID_MAIN:
@ -325,30 +326,37 @@ int Fl_Android_Screen_Driver::handle_queued_events(double time_to_wait)
timer_do_callback(Fl_Android_Application::receive_timer_index());
break;
case ALOOPER_POLL_WAKE:
Fl_Android_Application::log_e("Someone woke up ALooper_pollAll.");
Fl_Android_Application::log_e("Someone woke up ALooper_pollOnce.");
done = true;
break;
case ALOOPER_POLL_CALLBACK:
Fl_Android_Application::log_e(
"Someone added a callback to ALooper_pollAll.");
"Someone added a callback to ALooper_pollOnce.");
done = true;
break;
case ALOOPER_POLL_TIMEOUT:
// timer expired
done = true;
done = true; // timer expired, return to FLTK
break;
case ALOOPER_POLL_ERROR:
Fl_Android_Application::log_e(
"Something caused an ERROR in ALooper_pollAll.");
done = true;
"Something caused an ERROR in ALooper_pollOnce.");
done = true; // return to the app to find the error
break;
default:
Fl_Android_Application::log_e(
"Unknown return value from ALooper_pollAll.");
done = true;
"Unknown return value from ALooper_pollOnce.");
done = true; // return to the app, just in case
break;
}
// }
// we need to repeat this as long as there are messages in the queue, or any
// change in the graphical interface will trigger a redraw immediately. To
// save time and energy, we want to collect graphics changes and execute
// them as soon as no more events are pending.
// Setting delay to zero on the second round makes sure that all events
// are handled first, and the call returns only when no more
// events are pending.
delay = 0;
}
return ret;
}