public static void WndProc(Window window, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
if (msg == NativeMethods.WM_TOUCH)
{
var inputCount = wParam.ToInt32() & 0xffff;
var inputs = new TOUCHINPUT[inputCount];
if (NativeMethods.GetTouchInputInfo(lParam, inputCount, inputs, NativeMethods.TouchInputSize))
{
for (int i = 0; i < inputCount; i++)
{
var input = inputs[i];
var position = GraphicsHelper.DivideByDpi(new Point(input.x * 0.01, input.y * 0.01));
position.Offset(-(double)_actualLeft.GetValue(window), -(double)_actualTop.GetValue(window));
MessageTouchDevice device;
if (!_devices.TryGetValue(input.dwID, out device))
{
device = new MessageTouchDevice(input.dwID);
_devices.Add(input.dwID, device);
}
if (!device.IsActive && input.dwFlags.HasFlag(TOUCHEVENTF.TOUCHEVENTF_DOWN))
{
device.SetActiveSource(PresentationSource.FromVisual(window));
device.Position = position;
device.Activate();
device.ReportDown();
}
else if (device.IsActive && input.dwFlags.HasFlag(TOUCHEVENTF.TOUCHEVENTF_UP))
{
device.Position = position;
device.ReportUp();
device.Deactivate();
_devices.Remove(input.dwID);
}
else if (device.IsActive && input.dwFlags.HasFlag(TOUCHEVENTF.TOUCHEVENTF_MOVE) && device.Position != position)
{
device.Position = position;
device.ReportMove();
}
_lastTouch = DateTime.Now;
}
}
NativeMethods.CloseTouchInputHandle(lParam);
handled = true;
}
}
public static void WndProc(Window window, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
if (msg == NativeMethods.WM_TOUCH)
{
var inputCount = wParam.ToInt32() & 0xffff;
var inputs = new TOUCHINPUT[inputCount];
if (NativeMethods.GetTouchInputInfo(lParam, inputCount, inputs, NativeMethods.TouchInputSize))
{
for (int i = 0; i < inputCount; i++)
{
var input = inputs[i];
var position = GraphicsHelper.DivideByDpi(new Point(input.x * 0.01, input.y * 0.01));
position.Offset(-(double)_actualLeft.GetValue(window), -(double)_actualTop.GetValue(window));
MessageTouchDevice device;
if (!_devices.TryGetValue(input.dwID, out device))
{
device = new MessageTouchDevice(input.dwID);
_devices.Add(input.dwID, device);
}
if (!device.IsActive && input.dwFlags.HasFlag(TOUCHEVENTF.TOUCHEVENTF_DOWN))
{
device.SetActiveSource(PresentationSource.FromVisual(window));
device.Position = position;
device.Activate();
device.ReportDown();
}
else if (device.IsActive && input.dwFlags.HasFlag(TOUCHEVENTF.TOUCHEVENTF_UP))
{
device.Position = position;
device.ReportUp();
device.Deactivate();
_devices.Remove(input.dwID);
}
else if (device.IsActive && input.dwFlags.HasFlag(TOUCHEVENTF.TOUCHEVENTF_MOVE) && device.Position != position)
{
device.Position = position;
device.ReportMove();
}
_lastTouch = DateTime.Now;
}
}
NativeMethods.CloseTouchInputHandle(lParam);
handled = true;
}
}
