/// <summary>
/// Processes the machine update for controls which weren't seen with the current (latest) point.
/// </summary>
/// <param name="control">The control (which was not seen).</param>
/// <param name="data">The view-model for the control.</param>
/// <param name="window">The window where the control is located.</param>
/// <exception cref="ArgumentOutOfRangeException">
/// Thrown if the control is in an unexpected state (e.g. infrastructure created a new state and a module considers it,
/// but this module has not been updated).
/// </exception>
private void StateMachineUpdateForOtherControls(
SelectableControl control,
ISelectableControlViewModel data,
Window window)
{
switch (data.State)
{
case SelectableState.Idle:
break;
case SelectableState.SeenButWaiting:
if (data.CurrentGazeTimeSpan == TimeSpan.Zero)
{
data.State = SelectableState.Idle;
}
break;
case SelectableState.AnimationRunning:
if (data.CurrentGazeTimeSpan == TimeSpan.Zero)
{
data.State = SelectableState.Idle;
window.Dispatcher.Invoke(control.StopAnimation);
}
else
{
data.State = SelectableState.AnimationOnHold;
window.Dispatcher.Invoke(control.PauseAnimation);
}
break;
case SelectableState.AnimationOnHold:
if (data.CurrentGazeTimeSpan == TimeSpan.Zero)
{
data.State = SelectableState.Idle;
window.Dispatcher.Invoke(control.StopAnimation);
}
break;
case SelectableState.RecentlySelected:
if (data.CurrentGazeTimeSpan >= data.GazeTimeSpanBeforeCooldown)
{
data.CurrentGazeTimeSpan = TimeSpan.Zero;
}
if (data.CurrentGazeTimeSpan == TimeSpan.Zero)
{
data.State = SelectableState.Idle;
}
break;
default:
throw new ArgumentOutOfRangeException();
}
}
/// <summary>
/// Processes the machine update for the control which was seen with the current (latest) point.
/// </summary>
/// <param name="seenControl">The control which was seen.</param>
/// <param name="data">The view-model for the control.</param>
/// <param name="window">The window where the control is located.</param>
/// <exception cref="ArgumentOutOfRangeException">
/// Thrown if the control is in an unexpected state (e.g. infrastructure created a new state and a module considers it,
/// but this module has not been updated).
/// </exception>
private void StateMachineUpdateForSeenControl(
SelectableControl seenControl,
ISelectableControlViewModel data,
Window window)
{
bool isAlwaysSelectable = false;
window.Dispatcher.Invoke(() => isAlwaysSelectable = seenControl.IsAlwaysSelectable);
if (!data.IsSelectable &&
!isAlwaysSelectable)
{
return;
}
switch (data.State)
{
case SelectableState.Idle:
data.State = SelectableState.SeenButWaiting;
break;
case SelectableState.SeenButWaiting:
if (data.CurrentGazeTimeSpan == TimeSpan.Zero)
{
data.State = SelectableState.Idle;
}
if (data.CurrentGazeTimeSpan >= data.GazeTimeSpanBeforeAnimationBegins)
{
window.Dispatcher.Invoke(seenControl.PlayAnimation);
data.State = SelectableState.AnimationRunning;
}
break;
case SelectableState.AnimationRunning:
if (data.CurrentGazeTimeSpan >= data.GazeTimeSpanBeforeSelectionOccurs)
{
window.Dispatcher.Invoke(seenControl.Select);
data.State = SelectableState.RecentlySelected;
}
if (data.CurrentGazeTimeSpan == TimeSpan.Zero)
{
data.State = SelectableState.Idle;
window.Dispatcher.Invoke(seenControl.StopAnimation);
}
break;
case SelectableState.AnimationOnHold:
window.Dispatcher.Invoke(seenControl.ResumeAnimation);
data.State = SelectableState.AnimationRunning;
if (data.CurrentGazeTimeSpan == TimeSpan.Zero)
{
data.State = SelectableState.Idle;
window.Dispatcher.Invoke(seenControl.StopAnimation);
}
break;
case SelectableState.RecentlySelected:
if (data.CurrentGazeTimeSpan >= data.GazeTimeSpanBeforeCooldown)
{
data.CurrentGazeTimeSpan = TimeSpan.Zero;
}
if (data.CurrentGazeTimeSpan == TimeSpan.Zero)
{
data.State = SelectableState.Idle;
}
break;
default:
throw new ArgumentOutOfRangeException();
}
}