public static void HandleTouchMessage(ref Message m, object sender, EventHandler <TouchEventArgs> onTouchDown, EventHandler <TouchEventArgs> onTouchMove, EventHandler <TouchEventArgs> onTouchUp)
{
const int WM_TOUCHMOVE = 0x0240, WM_TOUCHDOWN = 0x0241, WM_TOUCHUP = 0x0242;
if (!WindowsUtils.IsWindows7)
{
return;
}
if (m.Msg != WM_TOUCHDOWN && m.Msg != WM_TOUCHMOVE && m.Msg != WM_TOUCHUP)
{
return;
}
// More than one touchinput may be associated with a touch message,
// so an array is needed to get all event information.
short inputCount = (short)(m.WParam.ToInt32() & 0xffff); // Number of touch inputs, actual per-contact messages
if (inputCount < 0)
{
return;
}
var inputs = new NativeMethods.TouchInput[inputCount];
// Unpack message parameters into the array of TOUCHINPUT structures, each
// representing a message for one single contact.
//Exercise2-Task1-Step3
if (!NativeMethods.GetTouchInputInfo(m.LParam, inputCount, inputs, _touchInputSize))
{
return;
}
// For each contact, dispatch the message to the appropriate message
// handler.
// Note that for WM_TOUCHDOWN you can get down & move notifications
// and for WM_TOUCHUP you can get up & move notifications
// WM_TOUCHMOVE will only contain move notifications
// and up & down notifications will never come in the same message
for (int i = 0; i < inputCount; i++)
{
NativeMethods.TouchInput ti = inputs[i];
// Assign a handler to this message.
EventHandler <TouchEventArgs> handler = null; // Touch event handler
if (ti.dwFlags.HasFlag(NativeMethods.TouchEvents.Down))
{
handler = onTouchDown;
}
else if (ti.dwFlags.HasFlag(NativeMethods.TouchEvents.Up))
{
handler = onTouchUp;
}
else if (ti.dwFlags.HasFlag(NativeMethods.TouchEvents.Move))
{
handler = onTouchMove;
}
// Convert message parameters into touch event arguments and handle the event.
if (handler != null)
{
// TOUCHINFO point coordinates and contact size is in 1/100 of a pixel; convert it to pixels.
// Also convert screen to client coordinates.
var te = new TouchEventArgs
{
ContactY = ti.cyContact / 100,
ContactX = ti.cxContact / 100,
ID = ti.dwID,
LocationX = ti.x / 100,
LocationY = ti.y / 100,
Time = ti.dwTime,
Mask = ti.dwMask,
InRange = ti.dwFlags.HasFlag(NativeMethods.TouchEvents.InRange),
Primary = ti.dwFlags.HasFlag(NativeMethods.TouchEvents.Primary),
NoCoalesce = ti.dwFlags.HasFlag(NativeMethods.TouchEvents.NoCoalesce),
Palm = ti.dwFlags.HasFlag(NativeMethods.TouchEvents.Palm)
};
handler(sender, te);
m.Result = new IntPtr(1); // Indicate to Windows that the message was handled
}
}
NativeMethods.CloseTouchInputHandle(m.LParam);
}
public static void HandleTouchMessage(ref Message m, object sender, EventHandler<TouchEventArgs> onTouchDown, EventHandler<TouchEventArgs> onTouchMove, EventHandler<TouchEventArgs> onTouchUp)
{
const int WM_TOUCHMOVE = 0x0240, WM_TOUCHDOWN = 0x0241, WM_TOUCHUP = 0x0242;
if (!WindowsUtils.IsWindows7) return;
if (m.Msg != WM_TOUCHDOWN && m.Msg != WM_TOUCHMOVE && m.Msg != WM_TOUCHUP) return;
// More than one touchinput may be associated with a touch message,
// so an array is needed to get all event information.
short inputCount = (short)(m.WParam.ToInt32() & 0xffff); // Number of touch inputs, actual per-contact messages
if (inputCount < 0) return;
var inputs = new NativeMethods.TouchInput[inputCount];
// Unpack message parameters into the array of TOUCHINPUT structures, each
// representing a message for one single contact.
//Exercise2-Task1-Step3
if (!NativeMethods.GetTouchInputInfo(m.LParam, inputCount, inputs, _touchInputSize))
return;
// For each contact, dispatch the message to the appropriate message
// handler.
// Note that for WM_TOUCHDOWN you can get down & move notifications
// and for WM_TOUCHUP you can get up & move notifications
// WM_TOUCHMOVE will only contain move notifications
// and up & down notifications will never come in the same message
for (int i = 0; i < inputCount; i++)
{
NativeMethods.TouchInput ti = inputs[i];
// Assign a handler to this message.
EventHandler<TouchEventArgs> handler = null; // Touch event handler
if (ti.dwFlags.HasFlag(NativeMethods.TouchEvents.Down)) handler = onTouchDown;
else if (ti.dwFlags.HasFlag(NativeMethods.TouchEvents.Up)) handler = onTouchUp;
else if (ti.dwFlags.HasFlag(NativeMethods.TouchEvents.Move)) handler = onTouchMove;
// Convert message parameters into touch event arguments and handle the event.
if (handler != null)
{
// TOUCHINFO point coordinates and contact size is in 1/100 of a pixel; convert it to pixels.
// Also convert screen to client coordinates.
var te = new TouchEventArgs
{
ContactY = ti.cyContact / 100,
ContactX = ti.cxContact / 100,
ID = ti.dwID,
LocationX = ti.x / 100,
LocationY = ti.y / 100,
Time = ti.dwTime,
Mask = ti.dwMask,
InRange = ti.dwFlags.HasFlag(NativeMethods.TouchEvents.InRange),
Primary = ti.dwFlags.HasFlag(NativeMethods.TouchEvents.Primary),
NoCoalesce = ti.dwFlags.HasFlag(NativeMethods.TouchEvents.NoCoalesce),
Palm = ti.dwFlags.HasFlag(NativeMethods.TouchEvents.Palm)
};
handler(sender, te);
m.Result = new IntPtr(1); // Indicate to Windows that the message was handled
}
}
NativeMethods.CloseTouchInputHandle(m.LParam);
}