public InputProcessor(Window window, UIElement inputElement) { _window = window; _inputElement = inputElement; window.EnableSurfaceInput(); inputElement.MouseDown += root_MouseDown; inputElement.MouseUp += root_MouseUp; inputElement.MouseMove += root_MouseMove; inputElement.TouchDown += root_TouchDown; inputElement.TouchMove += root_TouchMove; inputElement.TouchUp += root_TouchUp; }