Logo Search packages:      
Sourcecode: scummvm version File versions  Download package

webossdl-events.cpp

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.

 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.

 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $URL$
 * $Id$
 *
 */

#ifdef WEBOS

#include "common/scummsys.h"
#include "common/system.h"
#include "sys/time.h"
#include "time.h"

#include "backends/events/webossdl/webossdl-events.h"
#include "gui/message.h"

// Inidicates if gesture area is pressed down or not.
static bool gestureDown = false;

// The timestamp when screen was pressed down.
static int screenDownTime = 0;

// The timestamp when a possible drag operation was triggered.
static int dragStartTime = 0;

// The index of the motion pointer.
static int motionPtrIndex = -1;

// The maximum horizontal motion during dragging (For tap recognition).
static int dragDiffX = 0;

// The maximum vertical motion during dragging (For tap recognition).
static int dragDiffY = 0;

// Indicates if we are in drag mode.
static bool dragging = false;

// The current mouse position on the screen.
static int curX = 0, curY = 0;

// The time (seconds after 1/1/1970) when program started.
static time_t programStartTime = time(0);

/**
 * Returns the number of passed milliseconds since program start.
 *
 * @return The number of passed milliseconds.
 */
static time_t getMillis()
{
   struct timeval tv;
   gettimeofday(&tv, NULL);
   return (time(0) - programStartTime) * 1000 + tv.tv_usec / 1000;
}

/**
 * WebOS devices only have a Shift key and a CTRL key. There is also an Alt
 * key (the orange key) but this is already processed by WebOS to change the
 * mode of the keys so ScummVM must not use this key as a modifier. Instead
 * pressing down the gesture area is used as Alt key.
 *
 * @param mod   The pressed key modifier as detected by SDL.
 * @param event The ScummVM event to setup.
 */
void WebOSSdlEventSource::SDLModToOSystemKeyFlags(SDLMod mod,
            Common::Event &event) {
      event.kbd.flags = 0;

      if (mod & KMOD_SHIFT)
            event.kbd.flags |= Common::KBD_SHIFT;
      if (mod & KMOD_CTRL)
            event.kbd.flags |= Common::KBD_CTRL;
            
      // Holding down the gesture area emulates the ALT key
      if (gestureDown)
            event.kbd.flags |= Common::KBD_ALT;
}

/**
 * Before calling the original SDL implementation this method checks if the
 * gesture area is pressed down.
 *
 * @param ev    The SDL event
 * @param event The ScummVM event.
 * @return True if event was processed, false if not.
 */
bool WebOSSdlEventSource::handleKeyDown(SDL_Event &ev, Common::Event &event) {
      // Handle gesture area tap.
      if (ev.key.keysym.sym == SDLK_WORLD_71) {
            gestureDown = true;
            return true;
      }

      // Ensure that ALT key (Gesture down) is ignored when back or forward
      // gesture is detected. This is needed for WebOS 1 which releases the
      // gesture tap AFTER the backward gesture event and not BEFORE (Like
      // WebOS 2).
      if (ev.key.keysym.sym == 27 || ev.key.keysym.sym == 229) {
          gestureDown = false;
      }

      // Call original SDL key handler.
      return SdlEventSource::handleKeyDown(ev, event);
}

/**
 * Before calling the original SDL implementation this method checks if the
 * gesture area has been released.
 *
 * @param ev    The SDL event
 * @param event The ScummVM event.
 * @return True if event was processed, false if not.
 */
bool WebOSSdlEventSource::handleKeyUp(SDL_Event &ev, Common::Event &event) {
      // Handle gesture area tap.
      if (ev.key.keysym.sym == SDLK_WORLD_71) {
            gestureDown = false;
            return true;
      }

      // Call original SDL key handler.
      return SdlEventSource::handleKeyUp(ev, event);
}

/**
 * Handles mouse button press.
 *
 * @param ev    The SDL event
 * @param event The ScummVM event.
 * @return True if event was processed, false if not.
 */
bool WebOSSdlEventSource::handleMouseButtonDown(SDL_Event &ev, Common::Event &event) {
      if (motionPtrIndex == -1) {
            motionPtrIndex = ev.button.which;
            dragDiffX = 0;
            dragDiffY = 0;
            screenDownTime = getMillis();

            // Start dragging when pressing the screen shortly after a tap.
            if (getMillis() - dragStartTime < 250) {
                  dragging = true;
                  event.type = Common::EVENT_LBUTTONDOWN;
                  fillMouseEvent(event, curX, curY);
            }
      }
      return true;
}

/**
 * Handles mouse button release.
 *
 * @param ev    The SDL event
 * @param event The ScummVM event.
 * @return True if event was processed, false if not.
 */
bool WebOSSdlEventSource::handleMouseButtonUp(SDL_Event &ev, Common::Event &event) {
      if (motionPtrIndex == ev.button.which) {
            motionPtrIndex = -1;

            // When drag mode was active then simply send a mouse up event
            if (dragging)
            {
                  event.type = Common::EVENT_LBUTTONUP;
                  fillMouseEvent(event, curX, curY);
                  dragging = false;
                  return true;
            }

            // When mouse was moved 5 pixels or less then emulate a mouse button
            // click.
            if (ABS(dragDiffX) < 6 && ABS(dragDiffY) < 6)
            {
                  int duration = getMillis() - screenDownTime;

                  // When screen was pressed for less than 500ms then emulate a
                  // left mouse click.
                  if (duration < 500) {
                        event.type = Common::EVENT_LBUTTONUP;
                        fillMouseEvent(event, curX, curY);
                        g_system->getEventManager()->pushEvent(event);
                        event.type = Common::EVENT_LBUTTONDOWN;
                        dragStartTime = getMillis();
                  }

                  // When screen was pressed for less than 1000ms then emulate a
                  // right mouse click.
                  else if (duration < 1000) {
                        event.type = Common::EVENT_RBUTTONUP;
                        fillMouseEvent(event, curX, curY);
                        g_system->getEventManager()->pushEvent(event);
                        event.type = Common::EVENT_RBUTTONDOWN;
                  }

                  // When screen was pressed for more than 1000ms then emulate a
                  // middle mouse click.
                  else {
                        event.type = Common::EVENT_MBUTTONUP;
                        fillMouseEvent(event, curX, curY);
                        g_system->getEventManager()->pushEvent(event);
                        event.type = Common::EVENT_MBUTTONDOWN;
                  }

            }
      }
      return true;
}

/**
 * Handles mouse motion.
 *
 * @param ev    The SDL event
 * @param event The ScummVM event.
 * @return True if event was processed, false if not.
 */
bool WebOSSdlEventSource::handleMouseMotion(SDL_Event &ev, Common::Event &event) {
      if (ev.motion.which == motionPtrIndex) {
            int screenX = g_system->getWidth();
            int screenY = g_system->getHeight();
            curX = MIN(screenX, MAX(0, curX + ev.motion.xrel));
            curY = MIN(screenY, MAX(0, curY + ev.motion.yrel));
            dragDiffX += ev.motion.xrel;
            dragDiffY += ev.motion.yrel;
            event.type = Common::EVENT_MOUSEMOVE;
            fillMouseEvent(event, curX, curY);
      }
      return true;
}

#endif

Generated by  Doxygen 1.6.0   Back to index