/// <summary>
/// Raises TouchDown event.
/// </summary>
/// <param name="e">Provides event arguments.</param>
protected virtual void OnTouchMove(TouchEventArgs e)
{
EventHandler<TouchEventArgs> handler = TouchMove;
if (handler != null)
handler(this, e);
}
/// <summary>
/// Decode the message and create a collection of event arguments
/// </summary>
private IEnumerable<TouchEventArgs> DecodeMessage(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam, float dpiX, float dpiY)
{
// More than one touch input can be associated with a touch message
int inputCount = WinApi.LoWord(DevComponents.DotNetBar.WinApi.ToInt(wParam)); // Number of touch inputs, actual per-contact messages
WinApi.TOUCHINPUT[] inputs; // Array of TOUCHINPUT structures
inputs = new WinApi.TOUCHINPUT[inputCount]; // Allocate the storage for the parameters of the per-contact messages
try
{
// Unpack message parameters into the array of TOUCHINPUT structures, each representing a message for one single contact.
if (!WinApi.GetTouchInputInfo(lParam, inputCount, inputs, Marshal.SizeOf(inputs[0])))
{
// Touch info failed.
throw new Exception("Error calling GetTouchInputInfo API");
}
// For each contact, dispatch the message to the appropriate message handler.
// 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++)
{
TouchEventArgs touchEventArgs = new TouchEventArgs(this, dpiX, dpiY, ref inputs[i]);
yield return touchEventArgs;
}
}
finally
{
//WinApi.CloseTouchInputHandle(lParam);
}
}
void TouchHandlerTouchDown(object sender, TouchEventArgs e)
{
PerformDownAction(e.Location);
_LastTouchAction = DateTime.Now;
}