/// <summary>
/// Attach GazePointer behavior to this window
/// </summary>
public static GazePointer Attach(Window window, GazeClickParameters clickParams = null, GetGazeClickParameters getGazeClickParams = null,
Settings settings = null, bool forceMouseCursor = false)
{
if (settings == null)
{
settings = new Settings();
}
if (_gazeDataProvider == null)
{
_gazeDataProvider = GazeDataProvider.InitializeGazeDataProvider(settings.Sensor);
}
return(new GazePointer(
window,
clickParams ?? new GazeClickParameters
{
MouseDownDelay = 1 * DefaultMouseDownDelay,
MouseUpDelay = 2 * DefaultMouseDownDelay,
RepeatMouseDownDelay = 3 * DefaultMouseDownDelay
},
getGazeClickParams,
settings,
forceMouseCursor
));
}
static GazePointer()
{
_mouseListener = new MouseInputListener();
_logFilter = new LogFilter();
_logFilter.Initialize();
CreateCursorWindow();
_offScreenElement = new FrameworkElement();
_offScreenElementClickParams = new GazeClickParameters
{
MouseDownDelay = 1 * DefaultMouseDownDelay,
MouseUpDelay = 2 * DefaultMouseDownDelay,
RepeatMouseDownDelay = uint.MaxValue
};
_hwndMouseListner = _mouseListener.Hwnd;
}
void AdjustHistorySampleTime(GazeClickParameters clickParams)
{
// Update the max total time we are maintaining if we ever see a click param higher than what we have.
const int PAD_HISTORY = 500;// add a padding of time (in milliseconds) so that the history is slightly larger and includes the largest click param value
if ((clickParams.RepeatMouseDownDelay + PAD_HISTORY > _maxHistoryTime) && (clickParams.RepeatMouseDownDelay != uint.MaxValue))
{
_maxHistoryTime = clickParams.RepeatMouseDownDelay + PAD_HISTORY;
}
if ((clickParams.MouseUpDelay + PAD_HISTORY > _maxHistoryTime) && (clickParams.MouseUpDelay != uint.MaxValue))
{
_maxHistoryTime = clickParams.MouseUpDelay + PAD_HISTORY;
}
if ((clickParams.MouseDownDelay + PAD_HISTORY > _maxHistoryTime) && (clickParams.MouseDownDelay != uint.MaxValue))
{
_maxHistoryTime = clickParams.MouseDownDelay + PAD_HISTORY;
}
}
private GazePointer(Window window, GazeClickParameters clickParameters, GetGazeClickParameters getGazeClickParameters,
Settings settings, bool forceMouseCursor)
{
// TODO: Addition of loggingSettings with default as parameter WILL have introduced logging configuration bug.
_settings = settings;
_sensorSettings = settings.Sensor;
_filterSettings = settings.Filter;
_loggingSettings = settings.Logging;
_forceMouseCursor = forceMouseCursor;
if (_sensorSettings.Sensor == Sensors.Sensors.Mouse)
{
_filterSettings.ActiveFilter = FilterType.NullFilter;
}
_settings.PropertyChanged += (o, args) => _window.Dispatcher.BeginInvoke(new GazePointerDelegate(UpdateCursorStyle));
_filterSettings.PropertyChanged += (o, args) => _logFilter.Settings = _filterSettings;
_window = window;
_windowClosed = false;
_defaultClickParams = clickParameters;
_getGazeClickParams = getGazeClickParameters;
FindMainWindow();
window.LocationChanged += OnWindowLocationOrSizeChanged;
window.SizeChanged += OnWindowLocationOrSizeChanged;
window.Closed += OnWindowClosed;
UpdateCursorStyle();
var source = PresentationSource.FromVisual(window);
_transform = source.CompositionTarget.TransformFromDevice;
_reverseTransform = source.CompositionTarget.TransformToDevice;
//
// By the time we get here, the window may already be positioned correctly and
// may receive no further location/size changed events. If that doesn't happen
// _topLeft and _bottomRight don't get initialized correctly.
// So force a call here
//
OnWindowLocationOrSizeChanged(window, null);
if (source == null)
{
throw new NullReferenceException("Window does not contain a PresentationSource, may not be properly initialized");
}
if (source.CompositionTarget == null)
{
throw new NullReferenceException("Window Source does not contain a CompositionTarget, may not be properly initialized");
}
OriginalSignal = new GazeStats();
FilteredSignal = new GazeStats();
_xyFilter = InitializeFilter();
_gazeHistory = new List <GazeHistoryItem>();
_hitTargetTimes = new Dictionary <FrameworkElement, int>();
_hitTarget = _offScreenElement;
_gazeDataProvider.GazeEvent += OnGazeData;
_idleDetector.GoneIdle += OnEyeGazeGoneIdle;
}