public async void StartListener(CancellationToken cancellationToken)
{
try
{
await Task.Run(async() =>
{
while (await mouseChannelReader.WaitToReadAsync(cancellationToken))
{
Native.MouseChannelMessage message = await mouseChannelReader.ReadAsync(cancellationToken);
ProcessMessage(message);
}
});
}
catch (OperationCanceledException) { }
}
private void ProcessMessage(Native.MouseChannelMessage message)
{
if (message.lParam.dwExtraInfo.IsMarionetInstancePointer())
{
return;
}
switch (message.wParam)
{
case Native.LowLevelMouseProc_wParam.WM_LBUTTONDOWN:
MouseButtonPressed?.Invoke(this, new MouseButtonActionEventArgs(MouseButton.Left));
break;
case Native.LowLevelMouseProc_wParam.WM_LBUTTONUP:
MouseButtonReleased?.Invoke(this, new MouseButtonActionEventArgs(MouseButton.Left));
break;
case Native.LowLevelMouseProc_wParam.WM_MBUTTONDOWN:
MouseButtonPressed?.Invoke(this, new MouseButtonActionEventArgs(MouseButton.Middle));
break;
case Native.LowLevelMouseProc_wParam.WM_MBUTTONUP:
MouseButtonReleased?.Invoke(this, new MouseButtonActionEventArgs(MouseButton.Middle));
break;
case Native.LowLevelMouseProc_wParam.WM_RBUTTONDOWN:
MouseButtonPressed?.Invoke(this, new MouseButtonActionEventArgs(MouseButton.Right));
break;
case Native.LowLevelMouseProc_wParam.WM_RBUTTONUP:
MouseButtonReleased?.Invoke(this, new MouseButtonActionEventArgs(MouseButton.Right));
break;
case Native.LowLevelMouseProc_wParam.WM_MOUSEMOVE:
MouseMoved?.Invoke(this, new MouseMoveEventArgs(new Point(message.lParam.pt.x, message.lParam.pt.y), inputBlocking.IsInputBlocked));
break;
case Native.LowLevelMouseProc_wParam.WM_MOUSEWHEEL:
case Native.LowLevelMouseProc_wParam.WM_MOUSEHWHEEL:
int delta = message.lParam.mouseData >> 16; // delta is in the high word
MouseWheelDirection direction = message.wParam switch
{
Native.LowLevelMouseProc_wParam.WM_MOUSEWHEEL => MouseWheelDirection.Vertical,
Native.LowLevelMouseProc_wParam.WM_MOUSEHWHEEL => MouseWheelDirection.Horizontal,
_ => throw new NotImplementedException("This error should never occur."),
};
MouseWheel?.Invoke(this, new MouseWheelEventArgs(delta, direction));
break;
case Native.LowLevelMouseProc_wParam.WM_XBUTTONDOWN:
case Native.LowLevelMouseProc_wParam.WM_XBUTTONUP:
int xButton = message.lParam.mouseData >> 16; // button is in the high word
MouseButton button;
if (xButton == Native.Constants.XBUTTON1)
{
button = MouseButton.XButton1;
}
else if (xButton == Native.Constants.XBUTTON2)
{
button = MouseButton.XButton2;
}
else
{
break;
}
EventHandler <MouseButtonActionEventArgs>?eventHandler = message.wParam switch
{
Native.LowLevelMouseProc_wParam.WM_XBUTTONDOWN => MouseButtonPressed,
Native.LowLevelMouseProc_wParam.WM_XBUTTONUP => MouseButtonReleased,
_ => throw new NotImplementedException("This error should never occur."),
};
eventHandler?.Invoke(this, new MouseButtonActionEventArgs(button));
break;
}
}
