public void Execute(object parameter)
{
if (!CanExecute(parameter))
{
return;
}
var nextPresenter = TransitToNextClip(UpcomingClip);
if (Presenters.Count == 1)
{
return; //no previous presenter
}
var currentPresenter = Presenters[0];
if (nextPresenter.HidesPreviousClip && !currentPresenter.IsInExitSequence)
{
for (int i = 0; i < Presenters.Count - 1; i++)
{
if (Presenters[i].IsInExitSequence)
{
continue;
}
Presenters[i].ReadyForCrossfade -= Clip_ReadyForCrossfade;
if (i == 0)
{
Presenters[0].ExitSequenceCompleted += Clip_ExitSequenceCompleted;
}
else
{
Presenters[i].ExitSequenceCompleted += SubClip_ExitSequenceCompleted;
}
Presenters[i].StartExitSequence();
}
NextClipCommand.RaiseCanExecuteChanged();
}
}
/// <summary>
/// Accures when a clip that is in exit sequence completes the sequence. Should be removed.
/// </summary>
/// <param name="sender"></param>
void Clip_ExitSequenceCompleted(IClipPresenter sender)
{
sender.ExitSequenceCompleted -= Clip_ExitSequenceCompleted;
Presenters.Remove(sender);
if (!sender.HidesPreviousClip && sender == _presenterInFocus && Presenters.Count > 0)
{
_presenterInFocus = Presenters[0];
CurrentClip = Presenters[0].OriginalClip;
}
if (sender.HidesPreviousClip)
{
AdvanceCurrentClip();
}
else
{
AdvanceUpcomingClip();
}
NextClipCommand.RaiseCanExecuteChanged();
}
/// <summary>
/// Happens when a presenter which his exit sequence was started when he was not Presenters[0], only need
/// to remove from presenters.
/// </summary>
/// <param name="obj"></param>
void SubClip_ExitSequenceCompleted(IClipPresenter sender)
{
sender.ExitSequenceCompleted -= SubClip_ExitSequenceCompleted;
Presenters.Remove(sender);
NextClipCommand.RaiseCanExecuteChanged();
}
