sdl_epocevents.cpp

SDL库 在进行视频显示程序spcaview安装时必须的库文件

            {
            return 0; //TODO: Find out why events are get despite of cursor should be off
            }
*/
        const TPointerEvent* pointerEvent = aWsEvent.Pointer();
        const TPoint mousePos = EpocSdlEnv::WindowCoordinates(pointerEvent->iPosition);

        /*!! TODO Pointer do not yet work properly
        //SDL_TRACE1("SDL: EPOC_HandleWsEvent, pointerEvent->iType=%d", pointerEvent->iType); //!!

        if (Private->EPOC_ShrinkedHeight) {
            mousePos.iY <<= 1; // Scale y coordinate to shrinked screen height
        }
        if (Private->EPOC_ShrinkedWidth) {
            mousePos.iX <<= 1; // Scale x coordinate to shrinked screen width
        }
        */

		posted += SDL_PrivateMouseMotion(0, 0, mousePos.iX, mousePos.iY); /* Absolute position on screen */

		switch (pointerEvent->iType)
			{
        case TPointerEvent::EButton1Down:
            posted += SDL_PrivateMouseButton(SDL_PRESSED, SDL_BUTTON_LEFT, 0, 0);
			break;
        case TPointerEvent::EButton1Up:
			posted += SDL_PrivateMouseButton(SDL_RELEASED, SDL_BUTTON_LEFT, 0, 0);
			break;
        case TPointerEvent::EButton2Down:
            posted += SDL_PrivateMouseButton(SDL_PRESSED, SDL_BUTTON_RIGHT, 0, 0);
			break;
		case TPointerEvent::EButton2Up:
			posted += SDL_PrivateMouseButton(SDL_RELEASED, SDL_BUTTON_RIGHT, 0, 0);
			break;
        case TPointerEvent::EButton3Down:
            posted += SDL_PrivateMouseButton(SDL_PRESSED, SDL_BUTTON_MIDDLE, 0, 0);
			break;
        case TPointerEvent::EButton3Up:
			posted += SDL_PrivateMouseButton(SDL_RELEASED, SDL_BUTTON_MIDDLE, 0, 0);
			break;
			} // switch
        break;
	    }
    
    case EEventKeyDown: /* Key events */
    {
#ifdef SYMBIAN_CRYSTAL
		// special case: 9300/9500 rocker down, simulate left mouse button
		if (aWsEvent.Key()->iScanCode == EStdKeyDeviceA)
			{
            const TPointerCursorMode mode =  Private->EPOC_WsSession.PointerCursorMode();
            if(mode != EPointerCursorNone) 
                posted += SDL_PrivateMouseButton(SDL_PRESSED, SDL_BUTTON_LEFT, 0, 0);
			}
#endif
       (void*)TranslateKey(_this, aWsEvent.Key()->iScanCode, &keysym);
            
#ifndef DISABLE_JOYSTICK
        /* Special handling */
        switch((int)keysym.sym) {
        case SDLK_CAPSLOCK:
            if (!isCursorVisible) {
                /* Enable virtual cursor */
	            HAL::Set(HAL::EMouseState, HAL::EMouseState_Visible);
            }
            else {
                /* Disable virtual cursor */
                HAL::Set(HAL::EMouseState, HAL::EMouseState_Invisible);
            }
            isCursorVisible = !isCursorVisible;
            break;
        }
#endif        
	    posted += SDL_PrivateKeyboard(SDL_PRESSED, &keysym);
        break;
	} 

    case EEventKeyUp: /* Key events */
		{
#ifdef SYMBIAN_CRYSTAL
		// special case: 9300/9500 rocker up, simulate left mouse button
		if (aWsEvent.Key()->iScanCode == EStdKeyDeviceA)
			{
            posted += SDL_PrivateMouseButton(SDL_RELEASED, SDL_BUTTON_LEFT, 0, 0);
			}
#endif
	    posted += SDL_PrivateKeyboard(SDL_RELEASED, TranslateKey(_this, aWsEvent.Key()->iScanCode, &keysym));
        break;
		}
    
    case EEventFocusGained: /* SDL window got focus */
	    {
        Private->iIsWindowFocused = ETrue;
		posted += SDL_PrivateAppActive(1, SDL_APPINPUTFOCUS|SDL_APPMOUSEFOCUS);
        /* Draw window background and screen buffer */
        DisableKeyBlocking(_this);  //Markus: guess why:-)
 
        //RedrawWindowL(_this);  
        break;
	    }

    case EEventFocusLost: /* SDL window lost focus */
		{

		Private->iIsWindowFocused = EFalse;

		posted += SDL_PrivateAppActive(0, SDL_APPINPUTFOCUS|SDL_APPMOUSEFOCUS);

       
        break;
	    }

    case EEventModifiersChanged: 
    {
	    TModifiersChangedEvent* modEvent = aWsEvent.ModifiersChanged();
        TUint modstate = KMOD_NONE;
        if (modEvent->iModifiers == EModifierLeftShift)
            modstate |= KMOD_LSHIFT;
        if (modEvent->iModifiers == EModifierRightShift)
            modstate |= KMOD_RSHIFT;
        if (modEvent->iModifiers == EModifierLeftCtrl)
            modstate |= KMOD_LCTRL;
        if (modEvent->iModifiers == EModifierRightCtrl)
            modstate |= KMOD_RCTRL;
        if (modEvent->iModifiers == EModifierLeftAlt)
            modstate |= KMOD_LALT;
        if (modEvent->iModifiers == EModifierRightAlt)
            modstate |= KMOD_RALT;
        if (modEvent->iModifiers == EModifierLeftFunc)
            modstate |= KMOD_LMETA;
        if (modEvent->iModifiers == EModifierRightFunc)
            modstate |= KMOD_RMETA;
        if (modEvent->iModifiers == EModifierCapsLock)
            modstate |= KMOD_CAPS;
        SDL_SetModState(STATIC_CAST(SDLMod,(modstate | KMOD_LSHIFT)));
        break;
    }
	case EEventScreenDeviceChanged:
	        {
	        EpocSdlEnv::WaitDeviceChange();  
	        }
	    break;
    default:            
        break;
	} 
	
    return posted;
}

extern "C" {

void EPOC_PumpEvents(_THIS)
    {
    MEventQueue& events = EpocSdlEnv::EventQueue();
    while(events.HasData())
        {
        events.Lock();
       
       //there have to be a copy, so we can release
       //lock immediately. HandleWsEvent may cause
       //deadlock otherwise.
        
        const TWsEvent event = events.Shift();
		events.Unlock();
//        const TWsEvent& event = events.Top();
		EPOC_HandleWsEvent(_this, event);
//		events.Shift();
	    }
    }



void EPOC_InitOSKeymap(_THIS)
	{
	ResetKeyMap();
	EpocSdlEnv::ObserverEvent(MSDLObserver::EEventKeyMapInit ,0);
	}

static SDL_keysym *TranslateKey(_THIS, int scancode, SDL_keysym *keysym)
{
//    char debug[256];
    //SDL_TRACE1("SDL: TranslateKey, scancode=%d", scancode); //!!

	/* Set the keysym information */ 

	keysym->scancode = scancode;

    if ((scancode >= MAX_SCANCODE) && 
        ((scancode - ENonCharacterKeyBase + 0x0081) >= MAX_SCANCODE)) {
        SDL_SetError("Too big scancode");
        keysym->scancode = SDLK_UNKNOWN;
	    keysym->mod = KMOD_NONE; 
        return keysym;
    }

	keysym->mod = SDL_GetModState();

    /* Handle function keys: F1, F2, F3 ... */
    if (keysym->mod & KMOD_META) {
        if (scancode >= 'A' && scancode < ('A' + 24)) { /* first 32 alphabet keys */
            switch(scancode) {
                case 'Q': scancode = EStdKeyF1; break;
                case 'W': scancode = EStdKeyF2; break;
                case 'E': scancode = EStdKeyF3; break;
                case 'R': scancode = EStdKeyF4; break;
                case 'T': scancode = EStdKeyF5; break;
                case 'Y': scancode = EStdKeyF6; break;
                case 'U': scancode = EStdKeyF7; break;
                case 'I': scancode = EStdKeyF8; break;
                case 'A': scancode = EStdKeyF9; break;
                case 'S': scancode = EStdKeyF10; break;
                case 'D': scancode = EStdKeyF11; break;
                case 'F': scancode = EStdKeyF12; break;
            }
            keysym->sym = keymap[scancode];
        }
    }

    if (scancode >= ENonCharacterKeyBase) {
        // Non character keys
	    keysym->sym = keymap[scancode - 
            ENonCharacterKeyBase + 0x0081]; // !!hard coded
    } else {
	    keysym->sym = keymap[scancode];
    }

	/* Remap the arrow keys if the device is rotated */
/*
	if (Private->EPOC_ScreenOrientation == CFbsBitGc::EGraphicsOrientationRotated270) {
		switch(keysym->sym) {
			case SDLK_UP:	keysym->sym = SDLK_LEFT;  break;
			case SDLK_DOWN: keysym->sym = SDLK_RIGHT; break;
			case SDLK_LEFT: keysym->sym = SDLK_DOWN;  break;
			case SDLK_RIGHT:keysym->sym = SDLK_UP;    break;
		}
	}
*/
	/* If UNICODE is on, get the UNICODE value for the key */
	keysym->unicode = 0;

#if 0 // !!TODO:unicode

	if ( SDL_TranslateUNICODE ) 
    {
		/* Populate the unicode field with the ASCII value */
		keysym->unicode = scancode;
	}
#endif

    //!!
    //sprintf(debug, "SDL: TranslateKey: keysym->scancode=%d, keysym->sym=%d, keysym->mod=%d",
    //    keysym->scancode, keysym->sym, keysym->mod);
    //SDL_TRACE(debug); //!!

	return(keysym);
}

} /* extern "C" */