sdlinput.cpp

Linux系统下的《红色警戒》游戏

/*      _______   __   __   __   ______   __   __   _______   __   __                 
 *     / _____/\ / /\ / /\ / /\ / ____/\ / /\ / /\ / ___  /\ /  |\/ /\                
 *    / /\____\// / // / // / // /\___\// /_// / // /\_/ / // , |/ / /                 
 *   / / /__   / / // / // / // / /    / ___  / // ___  / // /| ' / /                  
 *  / /_// /\ / /_// / // / // /_/_   / / // / // /\_/ / // / |  / /                   
 * /______/ //______/ //_/ //_____/\ /_/ //_/ //_/ //_/ //_/ /|_/ /                    
 * \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/                      
 *
 * Copyright (c) 2004, 2005 darkbits                        Js_./
 * Per Larsson a.k.a finalman                          _RqZ{a<^_aa
 * Olof Naess閚 a.k.a jansem/yakslem                _asww7!uY`>  )\a//
 *                                                 _Qhm`] _f "'c  1!5m
 * Visit: http://guichan.darkbits.org             )Qk<P ` _: :+' .'  "{[
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 * License: (BSD)                                <Td/Z <fP"5(\"??"\a.  .L
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * For comments regarding functions please see the header file. 
 */

#include "guichan/sdl/sdlinput.h"
#include "guichan/exception.h"

namespace gcn
{
    SDLInput::SDLInput()
    {
        mMouseInWindow = true;
		mMouseDown = false;
    }
    
    bool SDLInput::isKeyQueueEmpty()
    {
        return mKeyInputQueue.empty();
    }
  
    KeyInput SDLInput::dequeueKeyInput()
    {
        KeyInput keyInput;
    
        if (mKeyInputQueue.empty())
        {
            throw GCN_EXCEPTION("The queue is empty.");
        }
    
        keyInput = mKeyInputQueue.front();
        mKeyInputQueue.pop();

        return keyInput;    
    }

    bool SDLInput::isMouseQueueEmpty()
    {
        return mMouseInputQueue.empty();
    }

    MouseInput SDLInput::dequeueMouseInput()
    {
        MouseInput mouseInput;
    
        if (mMouseInputQueue.empty())
        {
            throw GCN_EXCEPTION("The queue is empty.");
        }
    
        mouseInput = mMouseInputQueue.front();
        mMouseInputQueue.pop();

        return mouseInput;    
    }
    
    void SDLInput::pushInput(SDL_Event event)
    {
        KeyInput keyInput;
        MouseInput mouseInput;
    
        switch (event.type)
        {
          case SDL_KEYDOWN:
              keyInput.setKey(convertKeyCharacter(event.key.keysym));
              keyInput.setType(KeyInput::PRESS);        
              mKeyInputQueue.push(keyInput);
              break;

          case SDL_KEYUP:
              keyInput.setKey(convertKeyCharacter(event.key.keysym));
              keyInput.setType(KeyInput::RELEASE);
              mKeyInputQueue.push(keyInput);
              break;

          case SDL_MOUSEBUTTONDOWN:
              mMouseDown = true;
              mouseInput.x = event.button.x;
              mouseInput.y = event.button.y;
              mouseInput.setButton(convertMouseButton(event.button.button));
              mouseInput.setType(MouseInput::PRESS);
              mouseInput.setTimeStamp(SDL_GetTicks());
              mMouseInputQueue.push(mouseInput);
              break;

          case SDL_MOUSEBUTTONUP:
              mMouseDown = false;        
              mouseInput.x = event.button.x;
              mouseInput.y = event.button.y;
              mouseInput.setButton(convertMouseButton(event.button.button));
              mouseInput.setType(MouseInput::RELEASE);
              mouseInput.setTimeStamp(SDL_GetTicks());
              mMouseInputQueue.push(mouseInput);
              break;
        
          case SDL_MOUSEMOTION:
              mouseInput.x = event.button.x;
              mouseInput.y = event.button.y;
              mouseInput.setButton(MouseInput::EMPTY);
              mouseInput.setType(MouseInput::MOTION);
              mouseInput.setTimeStamp(SDL_GetTicks());
              mMouseInputQueue.push(mouseInput);
              break;
        
          case SDL_ACTIVEEVENT:
              /* 
               * This occurs when the mouse leaves the window and the Gui-chan
               * application loses its mousefocus.
               */
              if ((event.active.state & SDL_APPMOUSEFOCUS)
                  && !event.active.gain)
              {
                  mMouseInWindow = false;
          
                  if (!mMouseDown)
                  {
                      mouseInput.x = -1;
                      mouseInput.y = -1;
                      mouseInput.setButton(MouseInput::EMPTY);
                      mouseInput.setType(MouseInput::MOTION);
                      mMouseInputQueue.push(mouseInput);
                  }
              }

              if ((event.active.state & SDL_APPMOUSEFOCUS)
                  && event.active.gain)
              {
                  mMouseInWindow = true;
              }
              break;
        
        } // end switch
    }
  
    int SDLInput::convertMouseButton(int button)
    {
        switch (button)
        {
          case SDL_BUTTON_LEFT:
              return MouseInput::LEFT;
              break;
          case SDL_BUTTON_RIGHT:
              return MouseInput::RIGHT;
              break;
          case SDL_BUTTON_MIDDLE:
              return MouseInput::MIDDLE;
              break;
          case SDL_BUTTON_WHEELUP:
              return MouseInput::WHEEL_UP;
              break;
          case SDL_BUTTON_WHEELDOWN:
              return MouseInput::WHEEL_DOWN;
              break;
        } 

        throw GCN_EXCEPTION("Unknown SDL mouse type.");
    
        return 0;
    }

    Key SDLInput::convertKeyCharacter(SDL_keysym keysym)
    {
        int value = 0; 
        Key key;
    
        if (keysym.unicode < 255)
        {
			if (keysym.unicode == 0)
			{
				value = keysym.sym;
			}
			else
			{
	            value = (int)keysym.unicode;
			}
        }

        switch (keysym.sym)
        {
          case SDLK_TAB:
              value = Key::TAB;
              break;
          case SDLK_LALT:
              value = Key::LEFT_ALT;
              break;
          case SDLK_RALT:
              value = Key::RIGHT_ALT;
              break;
          case SDLK_LSHIFT:
              value = Key::LEFT_SHIFT;
              break;
          case SDLK_RSHIFT:
              value = Key::RIGHT_SHIFT;
              break;
          case SDLK_LCTRL:
              value = Key::LEFT_CONTROL;
              break;
          case SDLK_RCTRL:
              value = Key::RIGHT_CONTROL;
              break;
          case SDLK_BACKSPACE:
              value = Key::BACKSPACE;
              break;
          case SDLK_PAUSE:
              value = Key::PAUSE;
              break;
          case SDLK_SPACE:
              value = Key::SPACE;
              break;
          case SDLK_ESCAPE:
              value = Key::ESCAPE;
              break;
          case SDLK_DELETE:
              value = Key::DELETE;
              break;
          case SDLK_INSERT:
              value = Key::INSERT;
              break;
          case SDLK_HOME:
              value = Key::HOME;
              break;
          case SDLK_END:
              value = Key::END;
              break;
          case SDLK_PAGEUP:
              value = Key::PAGE_UP;
              break;
          case SDLK_PRINT:
              value = Key::PRINT_SCREEN;
              break;
          case SDLK_PAGEDOWN:
              value = Key::PAGE_DOWN;
              break;
          case SDLK_F1:
              value = Key::F1;
              break;
          case SDLK_F2:
              value = Key::F2;
              break;
          case SDLK_F3:
              value = Key::F3;
              break;
          case SDLK_F4:
              value = Key::F4;
              break;
          case SDLK_F5:
              value = Key::F5;
              break;
          case SDLK_F6:
              value = Key::F6;
              break;
          case SDLK_F7:
              value = Key::F7;
              break;
          case SDLK_F8:
              value = Key::F8;
              break;
          case SDLK_F9:
              value = Key::F9;
              break;
          case SDLK_F10:
              value = Key::F10;
              break;
          case SDLK_F11:
              value = Key::F11;
              break;
          case SDLK_F12:
              value = Key::F12;
              break;
          case SDLK_F13:
              value = Key::F13;
              break;
          case SDLK_F14:
              value = Key::F14;
              break;
          case SDLK_F15:
              value = Key::F15;
              break;
          case SDLK_NUMLOCK:
              value = Key::NUM_LOCK;
              break;
          case SDLK_CAPSLOCK:
              value = Key::CAPS_LOCK;
              break;
          case SDLK_SCROLLOCK:
              value = Key::SCROLL_LOCK;
              break;
          case SDLK_RMETA:
              value = Key::RIGHT_META;
              break;
          case SDLK_LMETA:
              value = Key::LEFT_META;
              break;
          case SDLK_LSUPER:
              value = Key::LEFT_SUPER;
              break;
          case SDLK_RSUPER:
              value = Key::RIGHT_SUPER;
              break;
          case SDLK_MODE:
              value = Key::ALT_GR;
              break;
          case SDLK_UP:
              value = Key::UP;
              break;
          case SDLK_DOWN:
              value = Key::DOWN;
              break;
          case SDLK_LEFT:
              value = Key::LEFT;
              break;
          case SDLK_RIGHT:
              value = Key::RIGHT;
              break;
          case SDLK_RETURN:
              value = Key::ENTER;
              break;
          case SDLK_KP_ENTER:
              value = Key::ENTER;
              break;

          default:
              break;
        }

        if (!(keysym.mod & KMOD_NUM))
        {
            switch (keysym.sym)
            {
              case SDLK_KP0:
                  value = Key::INSERT;
                  break;
              case SDLK_KP1:
                  value = Key::END;
                  break;
              case SDLK_KP2:
                  value = Key::DOWN;
                  break;
              case SDLK_KP3:
                  value = Key::PAGE_DOWN;
                  break;
              case SDLK_KP4:
                  value = Key::LEFT;
                  break;
              case SDLK_KP5:
                  value = 0;
                  break;
              case SDLK_KP6:
                  value = Key::RIGHT;
                  break;
              case SDLK_KP7:
                  value = Key::HOME;
                  break;
              case SDLK_KP8:
                  value = Key::UP;
                  break;
              case SDLK_KP9:
                  value = Key::PAGE_UP;
                  break;          
              default:
                  break;
            } 
        }

        key.setValue(value);
        key.setShiftPressed((keysym.mod & KMOD_SHIFT) != 0);
        key.setControlPressed((keysym.mod & KMOD_CTRL) != 0);
        key.setAltPressed((keysym.mod & KMOD_ALT) != 0);
        key.setMetaPressed((keysym.mod & KMOD_META) != 0);

        if (keysym.sym >= SDLK_KP0 && keysym.sym <= SDLK_KP_EQUALS)
        {
            key.setNumericPad(true);
        }
    
        return key;    
    }
}