public void Execute(IToolServices toolService)
{
Position position = toolService.PointerOverPosition;
MarkupInfo markups = toolService.Node.Markups;
MarkupKind markupKindOnPosition = markups.RemoveMarkupOnPosition(position);
if (SequenceMarkup == SequenceMarkupKind.Letter)
{
char letter = markups.GetSmallestUnusedLetter();
if (letter != '0' && markupKindOnPosition != MarkupKind.Label)
{
markups.AddMarkup <Label>(new Label(position, letter.ToString()));
}
}
else
{
int number = markups.GetSmallestUnusedNumber();
if (markupKindOnPosition != MarkupKind.Label)
{
markups.AddMarkup <Label>(new Label(position, number.ToString()));
}
}
_shadows = toolService.Node.Markups.FillSequenceShadowMap(toolService.GameTree.BoardSize, SequenceMarkup);
}
