private void RaiseCommandsChanged()
{
GetHintCommand.RaiseCanExecuteChanged();
PassCommand.RaiseCanExecuteChanged();
PressedCommand.RaiseCanExecuteChanged();
ResignCommand.RaiseCanExecuteChanged();
UndoCommand.RaiseCanExecuteChanged();
}
protected void UpdateCanPassAndUndo()
{
if (IsTimelineInPast)
{
CanUndo = false;
CanPass = false;
return;
}
CanPass = (this.Game?.Controller?.TurnPlayer?.IsHuman ?? false) ? true : false;
// TODO (future work) Petr this allows to undo before the beginning of the game and causes exception
if (this.Game?.Controller?.GameTree == null)
{
// Game not yet initialized.
CanUndo = false;
}
else if (this.Game.Controller.Players.Any(pl => pl.IsHuman))
{
if (Game.Controller.GameTree.LastNode.Equals(Game.Controller.GameTree.GameTreeRoot))
{
CanUndo = false;
}
else
{
bool undoPossible = this.Game.Controller.GameTree.PrimaryMoveTimeline.Any(
move =>
{
if (move.WhoMoves == StoneColor.None)
{
return(false);
}
return(this.Game.Controller.Players[move.WhoMoves].IsHuman);
});
CanUndo = undoPossible;
}
}
else
{
// No player is a local human.
CanUndo = false;
}
PassCommand.RaiseCanExecuteChanged();
UndoCommand.RaiseCanExecuteChanged();
}