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");
}
}
public void Build()
{
if (system == null)
{
if (InitSystem())
{
LSystems.IRewriteRules rules = definition as LSystems.IRewriteRules;
if (rules != null)
{
for (int i = 0; i < rules.Depth; ++i)
{
BuildNextStep(i == rules.Depth - 1);
}
}
}
}
}
private bool InitSystem()
{
if (system != null)
{
return(true);
}
SystemError = null;
if (!BuildDefinition())
{
return(false);
}
try
{
system = LSystems.SystemBuilder.BuildSystem(definition);
}
catch (InvalidOperationException e)
{
// Failure.
SystemError = e.Message;
return(false);
}
LSystems.IRewriteRules rules = definition as LSystems.IRewriteRules;
if (rules != null)
{
system.String = rules.Axiom;
}
steps.Clear();
this.steps.Insert(0, new Step()
{
System = system, Name = "Axiom"
});
return(true);
}
