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Use a nested event loop which polls and saves motion notify events for later 

This should speed up resizing/dragging quite a bit, thus fixing ticket #51
This commit is contained in:
Michael Stapelberg 2009-06-21 13:44:44 +02:00
parent 626e6b2b6f
commit a5489d6546
1 changed files with 41 additions and 30 deletions
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71
src/floating.c
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@ -254,42 +254,53 @@ static void drag_pointer(xcb_connection_t *conn, Client *client, xcb_button_pres
/* Go into our own event loop */
xcb_flush(conn);
xcb_generic_event_t *inside_event;
xcb_generic_event_t *inside_event, *last_motion_notify = NULL;
/* I’ve always wanted to have my own eventhandler… */
while ((inside_event = xcb_wait_for_event(conn))) {
/* Same as get_event_handler in xcb */
int nr = inside_event->response_type;
if (nr == 0) {
/* An error occured */
handle_event(NULL, conn, inside_event);
free(inside_event);
/* We now handle all events we can get using xcb_poll_for_event */
do {
/* Same as get_event_handler in xcb */
int nr = inside_event->response_type;
if (nr == 0) {
/* An error occured */
handle_event(NULL, conn, inside_event);
free(inside_event);
continue;
}
assert(nr < 256);
nr &= XCB_EVENT_RESPONSE_TYPE_MASK;
assert(nr >= 2);
switch (nr) {
case XCB_BUTTON_RELEASE:
goto done;
case XCB_MOTION_NOTIFY:
/* motion_notify events are saved for later */
FREE(last_motion_notify);
last_motion_notify = inside_event;
break;
default:
LOG("Passing to original handler\n");
/* Use original handler */
xcb_event_handle(&evenths, inside_event);
break;
}
if (last_motion_notify != inside_event)
free(inside_event);
} while ((inside_event = xcb_poll_for_event(conn)) != NULL);
if (last_motion_notify == NULL)
continue;
}
assert(nr < 256);
nr &= XCB_EVENT_RESPONSE_TYPE_MASK;
assert(nr >= 2);
/* Check if we need to escape this loop */
if (nr == XCB_BUTTON_RELEASE)
break;
new_x = ((xcb_motion_notify_event_t*)last_motion_notify)->root_x;
new_y = ((xcb_motion_notify_event_t*)last_motion_notify)->root_y;
switch (nr) {
case XCB_MOTION_NOTIFY:
new_x = ((xcb_motion_notify_event_t*)inside_event)->root_x;
new_y = ((xcb_motion_notify_event_t*)inside_event)->root_y;
callback(&old_rect, new_x, new_y);
break;
default:
LOG("Passing to original handler\n");
/* Use original handler */
xcb_event_handle(&evenths, inside_event);
break;
}
free(inside_event);
callback(&old_rect, new_x, new_y);
FREE(last_motion_notify);
}
done:
xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
xcb_flush(conn);
}