广州飞泰数码(原爱伊多媒体)

void CMTTestDlg::DecodeGesture(WPARAM wParam, LPARAM lParam)
{
    GESTUREINFO gi; 
    ZeroMemory(&gi, sizeof(GESTUREINFO));
    GetGestureInfo((HGESTUREINFO)lParam, &gi);
    switch (gi.dwID){
        case GID_ZOOM:
            // Code for zooming goes here
            break;
        case GID_PAN:
            break;
        case GID_ROTATE:
            break;
        case GID_TWOFINGERTAP:
            break;
        case GID_PRESSANDTAP:
            break;
        default:
            // You have encountered an unknown gesture
            break;
    CloseGestureInfoHandle((HGESTUREINFO)lParam);
}

case GID_ZOOM:
switch(gi.dwFlags)
{
case GF_BEGIN:
    _dwArguments = LODWORD(gi.ullArguments);
    _ptFirst.x = gi.ptsLocation.x;
    _ptFirst.y = gi.ptsLocation.y;
    ScreenToClient(hWnd,&_ptFirst);
    break;
default:
    // We read here the second point of the gesture. This is middle point between fingers. 
    _ptSecond.x = gi.ptsLocation.x;
    _ptSecond.y = gi.ptsLocation.y;
    ScreenToClient(hWnd,&_ptSecond);
    // We have to calculate zoom center point 
    ptZoomCenter.x = (_ptFirst.x + _ptSecond.x)/2;
    ptZoomCenter.y = (_ptFirst.y + _ptSecond.y)/2;           
    
    // The zoom factor is the ratio between the new and the old distance. 
    k = (double)(LODWORD(gi.ullArguments))/(double)(_dwArguments);
    // Now we process zooming in/out of the object
    ProcessZoom(k,ptZoomCenter.x,ptZoomCenter.y);
    InvalidateRect(hWnd,NULL,TRUE);

    // Now we have to store new information as a starting information for the next step
    _ptFirst = _ptSecond;
    _dwArguments = LODWORD(gi.ullArguments);
    break;
}
break;

case WM_TOUCH:
{
    unsigned int numInputs = (unsigned int) wParam; 
    TOUCHINPUT* ti = new TOUCHINPUT[numInputs]; 
    if(GetTouchInputInfo((HTOUCHINPUT)lParam, numInputs, ti, sizeof(TOUCHINPUT)))
    {
        // Handle each contact point
        for(unsigned int i=0; i< numInputs; ++i)
        {
           /* handle ti[i]  */
        }
    }
    CloseTouchInputHandle((HTOUCHINPUT)lParam);
    delete [] ti;
}
break;
default:
    return DefWindowProc(hWnd, message, wParam, lParam);


 

case WM_TOUCH:
{
    unsigned int numInputs = (unsigned int) wParam; 
    TOUCHINPUT* ti = new TOUCHINPUT[numInputs]; 
    if(GetTouchInputInfo((HTOUCHINPUT)lParam, numInputs, ti, sizeof(TOUCHINPUT)))
    {
        // For each contact, dispatch the message to the appropriate message handler.
        for(unsigned int i=0; i< numInputs; ++i)
        {
            if(ti[i].dwFlags & TOUCHEVENTF_DOWN)
            {
               OnTouchDownHandler(hWnd, ti[i]);
            }
            else if(ti[i].dwFlags & TOUCHEVENTF_MOVE)
            {
               OnTouchMoveHandler(hWnd, ti[i]);
            }
            else if(ti[i].dwFlags & TOUCHEVENTF_UP)
            {
               OnTouchUpHandler(hWnd, ti[i]);
            }
        }
    }
    CloseTouchInputHandle((HTOUCHINPUT)lParam);
    delete [] ti;
}
break;