private void BuildNextStep(bool setCurrentItem)
{
if (!InitSystem())
{
return;
}
// Iterate.
LSystems.IRewriteRules rules = definition as LSystems.IRewriteRules;
if (rules != null)
{
LSystems.System nextStep = system.Clone();
switch (rules.RewriteDirection)
{
case LSystems.RewriteDirection.LeftToRight:
nextStep.RewriteLeftToRight();
break;
case LSystems.RewriteDirection.RightToLeft:
nextStep.RewriteRightToLeft();
break;
default:
throw new InvalidOperationException("Unknown RewriteDirection");
}
nextStep.Decomposite();
this.steps.Insert(0, new Step()
{
System = nextStep, Name = string.Format("Step {0}", steps.Count)
});
system = nextStep;
}
if (setCurrentItem)
{
if (this.steps.Count > 0)
{
CollectionViewSource.GetDefaultView(this.steps).MoveCurrentTo(this.steps[0]);
}
NotifyPropertyChanged("System");
}
}
