private void OnStateChanged(AsyncData data)
{
using (data)
{
ResultCode resultCode;
if (!data.TryGetResultCode(out resultCode) || resultCode != ResultCode.Ok)
{
return;
}
using (var stateBag = data.GetDataAs <StateBag>())
{
if (stateBag != null)
{
if (_isInitialized)
{
T value;
if (GetData(stateBag, out value))
{
_currentValue = new EyeXEngineStateValue <T>(value);
}
}
}
}
}
}
public static EyeXDeviceStatus ConvertToEyeXDeviceStatus(EyeXEngineStateValue <EyeTrackingDeviceStatus> state)
{
if (state == null || !state.IsValid)
{
return(EyeXDeviceStatus.Unknown);
}
switch (state.Value)
{
// Pending?
case EyeTrackingDeviceStatus.Initializing:
case EyeTrackingDeviceStatus.Configuring:
return(EyeXDeviceStatus.Pending);
// Tracking?
case EyeTrackingDeviceStatus.Tracking:
return(EyeXDeviceStatus.Tracking);
// Disabled?
case EyeTrackingDeviceStatus.TrackingPaused:
return(EyeXDeviceStatus.Disabled);
// Not available
default:
return(EyeXDeviceStatus.NotAvailable);
}
}
public static EyeXUserPresence ConvertToEyeXUserPresence(EyeXEngineStateValue <UserPresence> state)
{
if (state == null || !state.IsValid)
{
return(EyeXUserPresence.Unknown);
}
switch (state.Value)
{
// Present?
case UserPresence.Present:
return(EyeXUserPresence.Present);
// Not present?
case UserPresence.NotPresent:
return(EyeXUserPresence.NotPresent);
// Unknown?
case UserPresence.Unknown:
return(EyeXUserPresence.Unknown);
default:
throw new InvalidOperationException("Unrecognized user presence value.");
}
}
public static EyeXGazeTracking ConvertToEyeXGazeTracking(EyeXHost host, EyeXEngineStateValue <GazeTracking> state)
{
if (host.EngineVersion == null || (host.EngineVersion != null && host.EngineVersion.Major >= 1 && host.EngineVersion.Minor >= 4))
{
if (state == null || !state.IsValid || state.Value == 0)
{
return(EyeXGazeTracking.Unknown);
}
switch (state.Value)
{
// Gaze tracked?
case GazeTracking.GazeTracked:
return(EyeXGazeTracking.GazeTracked);
// Gaze not tracked?
case GazeTracking.GazeNotTracked:
return(EyeXGazeTracking.GazeNotTracked);
default:
throw new InvalidOperationException("Unknown gaze tracking value.");
}
}
return(EyeXGazeTracking.NotSupported);
}
public static EyeXUserPresence ConvertToEyeXUserPresence(EyeXEngineStateValue<UserPresence> state)
{
if (state == null || !state.IsValid)
{
return EyeXUserPresence.Unknown;
}
switch (state.Value)
{
// Present?
case UserPresence.Present:
return EyeXUserPresence.Present;
// Not present?
case UserPresence.NotPresent:
return EyeXUserPresence.NotPresent;
// Unknown?
case UserPresence.Unknown:
return EyeXUserPresence.Unknown;
default:
throw new InvalidOperationException("Unrecognized user presence value.");
}
}
public static EyeXGazeTracking ConvertToEyeXGazeTracking(EyeXHost host, EyeXEngineStateValue<GazeTracking> state)
{
if(host.EngineVersion == null || (host.EngineVersion != null && host.EngineVersion.Major >= 1 && host.EngineVersion.Minor >= 4))
{
if (state == null || !state.IsValid || state.Value == 0)
{
return EyeXGazeTracking.Unknown;
}
switch (state.Value)
{
// Gaze tracked?
case GazeTracking.GazeTracked:
return EyeXGazeTracking.GazeTracked;
// Gaze not tracked?
case GazeTracking.GazeNotTracked:
return EyeXGazeTracking.GazeNotTracked;
default:
throw new InvalidOperationException("Unknown gaze tracking value.");
}
}
return EyeXGazeTracking.NotSupported;
}
public static EyeXDeviceStatus ConvertToEyeXDeviceStatus(EyeXEngineStateValue<EyeTrackingDeviceStatus> state)
{
if (state == null || !state.IsValid)
{
return EyeXDeviceStatus.Unknown;
}
switch (state.Value)
{
// Pending?
case EyeTrackingDeviceStatus.Initializing:
case EyeTrackingDeviceStatus.Configuring:
return EyeXDeviceStatus.Pending;
// Tracking?
case EyeTrackingDeviceStatus.Tracking:
return EyeXDeviceStatus.Tracking;
// Disabled?
case EyeTrackingDeviceStatus.TrackingPaused:
return EyeXDeviceStatus.Disabled;
// Not available
default:
return EyeXDeviceStatus.NotAvailable;
}
}
/// <summary>
/// Method to be invoked when the connection to the EyeX Engine has been lost.
/// </summary>
public void OnDisconnected()
{
if (_isInitialized)
{
// When disconnected: raise a state-changed event marking the state as invalid.
_currentValue = EyeXEngineStateValue <T> .Invalid;
}
}
/// <summary>
/// Gets the current value of the engine state.
/// </summary>
/// <param name="context">The interaction context.</param>
/// <returns>The state value.</returns>
public EyeXEngineStateValue <T> GetCurrentValue(Context context)
{
if (_currentValue == null)
{
// This is the first time someone asks for the current value.
// We don't have a value yet, but we'll make sure we get one.
_currentValue = EyeXEngineStateValue <T> .Invalid;
// Register the state changed handler.
RegisterStateChangedHandler(context);
}
return(_currentValue);
}
private void UpdateProfiles(
EyeXEngineStateValue <string[]> profiles,
EyeXEngineStateValue <string> currentProfile)
{
if (profiles.IsValid && currentProfile.IsValid)
{
// Draw the title.
GuiHelpers.DrawText("Click a profile button to activate it.", new Vector2(10, 60), 18, GuiHelpers.Black);
for (int index = 0; index < profiles.Value.Length; index++)
{
// Get the profile name.
var profileName = profiles.Value[index];
// Should we disable the GUI?
var isCurrentProfile = profileName == currentProfile.Value;
if (isCurrentProfile)
{
GUI.enabled = false;
}
// Draw the button.
var buttonX = buttonMargin;
var buttonY = 100 + (index * (buttonHeight + buttonMargin));
var buttonRect = new Rect(buttonX, buttonY, buttonWidth, buttonHeight);
if (GUI.Button(buttonRect, profileName))
{
// Set the current user profile.
_host.SetCurrentProfile(profileName);
}
// Re-enable the GUI.
GUI.enabled = true;
}
}
else
{
// No valid profile name.
GuiHelpers.DrawText("Error: Could not retrieve profile names.", new Vector2(10, 60), 18, GuiHelpers.Red);
}
}
private void UpdateProfiles(
EyeXEngineStateValue<string[]> profiles,
EyeXEngineStateValue<string> currentProfile)
{
if(profiles.IsValid && currentProfile.IsValid)
{
// Draw the title.
GuiHelpers.DrawText("Click a profile button to activate it.", new Vector2(10, 60), 18, GuiHelpers.Black);
for(int index = 0; index < profiles.Value.Length; index++)
{
// Get the profile name.
var profileName = profiles.Value[index];
// Should we disable the GUI?
var isCurrentProfile = profileName == currentProfile.Value;
if(isCurrentProfile)
{
GUI.enabled = false;
}
// Draw the button.
var buttonX = buttonMargin;
var buttonY = 100 + (index * (buttonHeight + buttonMargin));
var buttonRect = new Rect(buttonX, buttonY, buttonWidth, buttonHeight);
if (GUI.Button(buttonRect, profileName))
{
// Set the current user profile.
_host.SetCurrentProfile(profileName);
}
// Re-enable the GUI.
GUI.enabled = true;
}
}
else
{
// No valid profile name.
GuiHelpers.DrawText("Error: Could not retrieve profile names.", new Vector2(10, 60), 18, GuiHelpers.Red);
}
}