+ if (PendingEvent())
+ HandleEvents();
+ else
+ HandleNoEvent();
+
+ /* execute event related actions after pending events have been processed */
+ HandleEventActions();
+
+ /* don't use all CPU time when idle; the main loop while playing
+ has its own synchronization and is CPU friendly, too */
+
+ if (game_status == GAME_MODE_PLAYING)
+ HandleGameActions();
+
+ /* always copy backbuffer to visible screen for every video frame */
+ BackToFront();
+
+ /* reset video frame delay to default (may change again while playing) */
+ SetVideoFrameDelay(MenuFrameDelay);
+
+ if (game_status == GAME_MODE_QUIT)
+ return;
+ }
+}
+
+void ClearEventQueue()
+{
+ Event event;
+
+ while (NextValidEvent(&event))
+ {
+ switch (event.type)
+ {
+ case EVENT_BUTTONRELEASE:
+ button_status = MB_RELEASED;
+ break;
+
+ case EVENT_KEYRELEASE:
+ ClearPlayerAction();
+ break;
+
+#if defined(TARGET_SDL2)
+ case SDL_CONTROLLERBUTTONUP:
+ HandleJoystickEvent(&event);
+ ClearPlayerAction();
+ break;
+#endif
+
+ default:
+ HandleOtherEvents(&event);
+ break;
+ }
+ }
+}
+
+void ClearPlayerMouseAction()
+{
+ local_player->mouse_action.lx = 0;
+ local_player->mouse_action.ly = 0;
+ local_player->mouse_action.button = 0;
+}
+
+void ClearPlayerAction()
+{
+ int i;
+
+ /* simulate key release events for still pressed keys */
+ key_joystick_mapping = 0;
+ for (i = 0; i < MAX_PLAYERS; i++)
+ stored_player[i].action = 0;
+
+ ClearJoystickState();
+ ClearPlayerMouseAction();
+}
+
+void SetPlayerMouseAction(int mx, int my, int button)
+{
+ int lx = getLevelFromScreenX(mx);
+ int ly = getLevelFromScreenY(my);
+ int new_button = (!local_player->mouse_action.button && button);
+
+ if (local_player->mouse_action.button_hint)
+ button = local_player->mouse_action.button_hint;
+
+ ClearPlayerMouseAction();
+
+ if (!IN_GFX_FIELD_PLAY(mx, my) || !IN_LEV_FIELD(lx, ly))
+ return;
+
+ local_player->mouse_action.lx = lx;
+ local_player->mouse_action.ly = ly;
+ local_player->mouse_action.button = button;
+
+ if (tape.recording && tape.pausing && tape.use_mouse)
+ {
+ /* un-pause a paused game only if mouse button was newly pressed down */
+ if (new_button)
+ TapeTogglePause(TAPE_TOGGLE_AUTOMATIC);
+ }
+
+ SetTileCursorXY(lx, ly);
+}
+
+void SleepWhileUnmapped()
+{
+ boolean window_unmapped = TRUE;
+
+ KeyboardAutoRepeatOn();
+
+ while (window_unmapped)
+ {
+ Event event;
+
+ if (!WaitValidEvent(&event))
+ continue;
+
+ switch (event.type)
+ {
+ case EVENT_BUTTONRELEASE:
+ button_status = MB_RELEASED;
+ break;
+
+ case EVENT_KEYRELEASE:
+ key_joystick_mapping = 0;
+ break;
+
+#if defined(TARGET_SDL2)
+ case SDL_CONTROLLERBUTTONUP:
+ HandleJoystickEvent(&event);
+ key_joystick_mapping = 0;
+ break;
+#endif
+
+ case EVENT_MAPNOTIFY:
+ window_unmapped = FALSE;
+ break;
+
+ case EVENT_UNMAPNOTIFY:
+ /* this is only to surely prevent the 'should not happen' case
+ * of recursively looping between 'SleepWhileUnmapped()' and
+ * 'HandleOtherEvents()' which usually calls this funtion.
+ */
+ break;
+
+ default:
+ HandleOtherEvents(&event);
+ break;
+ }
+ }
+
+ if (game_status == GAME_MODE_PLAYING)
+ KeyboardAutoRepeatOffUnlessAutoplay();
+}
+
+void HandleExposeEvent(ExposeEvent *event)
+{
+}
+
+void HandleButtonEvent(ButtonEvent *event)
+{
+#if DEBUG_EVENTS_BUTTON
+ Error(ERR_DEBUG, "BUTTON EVENT: button %d %s, x/y %d/%d\n",
+ event->button,
+ event->type == EVENT_BUTTONPRESS ? "pressed" : "released",
+ event->x, event->y);
+#endif
+
+ // for any mouse button event, disable playfield tile cursor
+ SetTileCursorEnabled(FALSE);
+
+#if defined(HAS_SCREEN_KEYBOARD)
+ if (video.shifted_up)
+ event->y += video.shifted_up_pos;
+#endif
+
+ motion_status = FALSE;
+
+ if (event->type == EVENT_BUTTONPRESS)
+ button_status = event->button;
+ else
+ button_status = MB_RELEASED;
+
+ HandleButton(event->x, event->y, button_status, event->button);
+}
+
+void HandleMotionEvent(MotionEvent *event)
+{
+ if (button_status == MB_RELEASED && game_status != GAME_MODE_EDITOR)
+ return;
+
+ motion_status = TRUE;
+
+#if DEBUG_EVENTS_MOTION
+ Error(ERR_DEBUG, "MOTION EVENT: button %d moved, x/y %d/%d\n",
+ button_status, event->x, event->y);
+#endif
+
+ HandleButton(event->x, event->y, button_status, button_status);
+}
+
+#if defined(TARGET_SDL2)
+
+void HandleWheelEvent(WheelEvent *event)
+{
+ int button_nr;
+
+#if DEBUG_EVENTS_WHEEL
+#if 1
+ Error(ERR_DEBUG, "WHEEL EVENT: mouse == %d, x/y == %d/%d\n",
+ event->which, event->x, event->y);
+#else
+ // (SDL_MOUSEWHEEL_NORMAL/SDL_MOUSEWHEEL_FLIPPED needs SDL 2.0.4 or newer)
+ Error(ERR_DEBUG, "WHEEL EVENT: mouse == %d, x/y == %d/%d, direction == %s\n",
+ event->which, event->x, event->y,
+ (event->direction == SDL_MOUSEWHEEL_NORMAL ? "SDL_MOUSEWHEEL_NORMAL" :
+ "SDL_MOUSEWHEEL_FLIPPED"));
+#endif
+#endif
+
+ button_nr = (event->x < 0 ? MB_WHEEL_LEFT :
+ event->x > 0 ? MB_WHEEL_RIGHT :
+ event->y < 0 ? MB_WHEEL_DOWN :
+ event->y > 0 ? MB_WHEEL_UP : 0);
+
+#if defined(PLATFORM_WIN32) || defined(PLATFORM_MACOSX)
+ // accelerated mouse wheel available on Mac and Windows
+ wheel_steps = (event->x ? ABS(event->x) : ABS(event->y));
+#else
+ // no accelerated mouse wheel available on Unix/Linux
+ wheel_steps = DEFAULT_WHEEL_STEPS;
+#endif
+
+ motion_status = FALSE;
+
+ button_status = button_nr;
+ HandleButton(0, 0, button_status, -button_nr);
+
+ button_status = MB_RELEASED;
+ HandleButton(0, 0, button_status, -button_nr);
+}
+
+void HandleWindowEvent(WindowEvent *event)
+{
+#if DEBUG_EVENTS_WINDOW
+ int subtype = event->event;
+
+ char *event_name =
+ (subtype == SDL_WINDOWEVENT_SHOWN ? "SDL_WINDOWEVENT_SHOWN" :
+ subtype == SDL_WINDOWEVENT_HIDDEN ? "SDL_WINDOWEVENT_HIDDEN" :
+ subtype == SDL_WINDOWEVENT_EXPOSED ? "SDL_WINDOWEVENT_EXPOSED" :
+ subtype == SDL_WINDOWEVENT_MOVED ? "SDL_WINDOWEVENT_MOVED" :
+ subtype == SDL_WINDOWEVENT_SIZE_CHANGED ? "SDL_WINDOWEVENT_SIZE_CHANGED" :
+ subtype == SDL_WINDOWEVENT_RESIZED ? "SDL_WINDOWEVENT_RESIZED" :
+ subtype == SDL_WINDOWEVENT_MINIMIZED ? "SDL_WINDOWEVENT_MINIMIZED" :
+ subtype == SDL_WINDOWEVENT_MAXIMIZED ? "SDL_WINDOWEVENT_MAXIMIZED" :
+ subtype == SDL_WINDOWEVENT_RESTORED ? "SDL_WINDOWEVENT_RESTORED" :
+ subtype == SDL_WINDOWEVENT_ENTER ? "SDL_WINDOWEVENT_ENTER" :
+ subtype == SDL_WINDOWEVENT_LEAVE ? "SDL_WINDOWEVENT_LEAVE" :
+ subtype == SDL_WINDOWEVENT_FOCUS_GAINED ? "SDL_WINDOWEVENT_FOCUS_GAINED" :
+ subtype == SDL_WINDOWEVENT_FOCUS_LOST ? "SDL_WINDOWEVENT_FOCUS_LOST" :
+ subtype == SDL_WINDOWEVENT_CLOSE ? "SDL_WINDOWEVENT_CLOSE" :
+ "(UNKNOWN)");
+
+ Error(ERR_DEBUG, "WINDOW EVENT: '%s', %ld, %ld",
+ event_name, event->data1, event->data2);
+#endif
+
+#if 0
+ // (not needed, as the screen gets redrawn every 20 ms anyway)
+ if (event->event == SDL_WINDOWEVENT_SIZE_CHANGED ||
+ event->event == SDL_WINDOWEVENT_RESIZED ||
+ event->event == SDL_WINDOWEVENT_EXPOSED)
+ SDLRedrawWindow();
+#endif
+
+ if (event->event == SDL_WINDOWEVENT_RESIZED)
+ {
+ if (!video.fullscreen_enabled)