+
+#define DEBUG_EVENTS 0
+
+#define DEBUG_EVENTS_BUTTON (DEBUG_EVENTS * 0)
+#define DEBUG_EVENTS_MOTION (DEBUG_EVENTS * 0)
+#define DEBUG_EVENTS_WINDOW (DEBUG_EVENTS * 0)
+#define DEBUG_EVENTS_FINGER (DEBUG_EVENTS * 0)
+#define DEBUG_EVENTS_TEXT (DEBUG_EVENTS * 1)
+#define DEBUG_EVENTS_KEY (DEBUG_EVENTS * 1)
+
+
+static boolean cursor_inside_playfield = FALSE;
+static int cursor_mode_last = CURSOR_DEFAULT;
+static unsigned int special_cursor_delay = 0;
+static unsigned int special_cursor_delay_value = 1000;
+
+/* event filter especially needed for SDL event filtering due to
+ delay problems with lots of mouse motion events when mouse button
+ not pressed (X11 can handle this with 'PointerMotionHintMask') */
+
+/* event filter addition for SDL2: as SDL2 does not have a function to enable
+ or disable keyboard auto-repeat, filter repeated keyboard events instead */
+
+static int FilterEventsExt(const Event *event)
+{
+ MotionEvent *motion;
+
+#if defined(TARGET_SDL2)
+ /* skip repeated key press events if keyboard auto-repeat is disabled */
+ if (event->type == EVENT_KEYPRESS &&
+ event->key.repeat &&
+ !keyrepeat_status)
+ return 0;
+#endif
+
+ /* non-motion events are directly passed to event handler functions */
+ if (event->type != EVENT_MOTIONNOTIFY)
+ return 1;
+
+ motion = (MotionEvent *)event;
+ cursor_inside_playfield = (motion->x >= SX && motion->x < SX + SXSIZE &&
+ motion->y >= SY && motion->y < SY + SYSIZE);
+
+ /* do no reset mouse cursor before all pending events have been processed */
+ if (gfx.cursor_mode == cursor_mode_last &&
+ ((game_status == GAME_MODE_TITLE &&
+ gfx.cursor_mode == CURSOR_NONE) ||
+ (game_status == GAME_MODE_PLAYING &&
+ gfx.cursor_mode == CURSOR_PLAYFIELD)))
+ {
+ SetMouseCursor(CURSOR_DEFAULT);
+
+ DelayReached(&special_cursor_delay, 0);
+
+ cursor_mode_last = CURSOR_DEFAULT;
+ }
+
+ /* skip mouse motion events without pressed button outside level editor */
+ if (button_status == MB_RELEASED &&
+ game_status != GAME_MODE_EDITOR && game_status != GAME_MODE_PLAYING)
+ return 0;
+
+ return 1;
+}
+
+#if defined(TARGET_SDL2)
+int FilterEvents(void *userdata, Event *event)
+{
+ return FilterEventsExt(event);
+}
+#else
+int FilterEvents(const Event *event)
+{
+ return FilterEventsExt(event);
+}
+#endif
+
+/* to prevent delay problems, skip mouse motion events if the very next
+ event is also a mouse motion event (and therefore effectively only
+ handling the last of a row of mouse motion events in the event queue) */
+
+boolean SkipPressedMouseMotionEvent(const Event *event)
+{
+ /* nothing to do if the current event is not a mouse motion event */
+ if (event->type != EVENT_MOTIONNOTIFY)
+ return FALSE;
+
+ /* only skip motion events with pressed button outside the game */
+ if (button_status == MB_RELEASED || game_status == GAME_MODE_PLAYING)
+ return FALSE;
+
+ if (PendingEvent())
+ {
+ Event next_event;
+
+ PeekEvent(&next_event);
+
+ /* if next event is also a mouse motion event, skip the current one */
+ if (next_event.type == EVENT_MOTIONNOTIFY)
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+/* this is only really needed for non-SDL targets to filter unwanted events;
+ when using SDL with properly installed event filter, this function can be
+ replaced with a simple "NextEvent()" call, but it doesn't hurt either */
+
+boolean NextValidEvent(Event *event)
+{
+ while (PendingEvent())
+ {
+ boolean handle_this_event = FALSE;
+
+ NextEvent(event);
+
+ if (FilterEventsExt(event))
+ handle_this_event = TRUE;
+
+ if (SkipPressedMouseMotionEvent(event))
+ handle_this_event = FALSE;
+
+ if (handle_this_event)
+ return TRUE;
+ }
+
+ return FALSE;
+}