/// <summary>
/// http://social.msdn.microsoft.com/Forums/en-US/netfxbcl/thread/5c8ff964-c087-43c0-a88d-0ce7719e033c
/// c:\Program Files\Microsoft SDKs\Windows\v7.1\Samples\Touch\MTScratchpadWMTouch\CS\
/// </summary>
private bool DecodeTouch(IntPtr wParam, IntPtr lParam)
{
// More than one touch input may be associated with a touch message,
// so an array is needed to get all event information.
int inputCount = LoWord(wParam.ToInt32()); // Number of touch inputs, actual per-contact messages
var inputs = new TOUCHINPUT[inputCount]; // Allocate the storage for the parameters of the per-contact messages
// Unpack message parameters into the array of TOUCHINPUT structures, each
// representing a message for one single contact.
var touchInputSize = Marshal.SizeOf(new TOUCHINPUT());
if (!GetTouchInputInfo(lParam, inputCount, inputs, touchInputSize))
{
// Get touch info failed.
return false;
}
// For each contact, dispatch the message to the appropriate message
// handler.
bool handled = false; // Boolean, is message handled
for (int i = 0; i < inputCount; i++)
{
TOUCHINPUT ti = inputs[i];
// Assign a handler to this message.
EventHandler<MouseTouchEventArgs> handler = null; // Touch event handler
if ((ti.dwFlags & TOUCHEVENTF_DOWN) != 0)
{
handler = OnTouchDown;
}
else if ((ti.dwFlags & TOUCHEVENTF_UP) != 0)
{
handler = OnTouchUp;
}
else if ((ti.dwFlags & TOUCHEVENTF_MOVE) != 0)
{
handler = OnTouchMove;
}
// Convert message parameters into touch event arguments and handle the event.
if (handler != null)
{
// Convert the raw touch input message into a touch event.
var te = new MouseTouchEventArgs(); // Touch event arguments
// TOUCHINFO point coordinates and contact size is in 1/100 of a pixel; convert it to pixels.
// Also convert screen to client coordinates.
te.ContactY = ti.cyContact / 100;
te.ContactX = ti.cxContact / 100;
te.Id = ti.dwID;
{
te.LocationX = ti.x / 100;
te.LocationY = ti.y / 100;
}
te.Time = ti.dwTime;
te.Mask = ti.dwMask;
te.Flags = ti.dwFlags;
// Invoke the event handler.
handler(this, te);
// Mark this event as handled.
handled = true;
}
}
CloseTouchInputHandle(lParam);
return handled;
}
/// <summary>
/// http://social.msdn.microsoft.com/Forums/en-US/netfxbcl/thread/5c8ff964-c087-43c0-a88d-0ce7719e033c
/// c:\Program Files\Microsoft SDKs\Windows\v7.1\Samples\Touch\MTScratchpadWMTouch\CS\
/// </summary>
private bool DecodeTouch(IntPtr wParam, IntPtr lParam)
{
// More than one touch input may be associated with a touch message,
// so an array is needed to get all event information.
int inputCount = LoWord(wParam.ToInt32()); // Number of touch inputs, actual per-contact messages
var inputs = new TOUCHINPUT[inputCount]; // Allocate the storage for the parameters of the per-contact messages
// Unpack message parameters into the array of TOUCHINPUT structures, each
// representing a message for one single contact.
var touchInputSize = Marshal.SizeOf(new TOUCHINPUT());
if (!NativeMethods.GetTouchInputInfo(lParam, inputCount, inputs, touchInputSize))
{
// Get touch info failed.
return(false);
}
// For each contact, dispatch the message to the appropriate message
// handler.
bool handled = false; // Boolean, is message handled
for (int i = 0; i < inputCount; i++)
{
TOUCHINPUT ti = inputs[i];
// Assign a handler to this message.
EventHandler <MouseTouchEventArgs> handler = null; // Touch event handler
if ((ti.dwFlags & TOUCHEVENTF_DOWN) != 0)
{
handler = OnTouchDown;
}
else if ((ti.dwFlags & TOUCHEVENTF_UP) != 0)
{
handler = OnTouchUp;
}
else if ((ti.dwFlags & TOUCHEVENTF_MOVE) != 0)
{
handler = OnTouchMove;
}
// Convert message parameters into touch event arguments and handle the event.
if (handler != null)
{
// Convert the raw touch input message into a touch event.
var te = new MouseTouchEventArgs(); // Touch event arguments
// TOUCHINFO point coordinates and contact size is in 1/100 of a pixel; convert it to pixels.
// Also convert screen to client coordinates.
te.ContactY = ti.cyContact / 100;
te.ContactX = ti.cxContact / 100;
te.Id = ti.dwID;
{
te.LocationX = ti.x / 100;
te.LocationY = ti.y / 100;
}
te.Time = ti.dwTime;
te.Mask = ti.dwMask;
te.Flags = ti.dwFlags;
// Invoke the event handler.
handler(this, te);
// Mark this event as handled.
handled = true;
}
}
NativeMethods.CloseTouchInputHandle(lParam);
return(handled);
}
