private void CalculateLayout(int preferredWidth, int preferredHeight, int minHDistance, int minVDistance)
{
layoutEngine.NodeWidth = preferredWidth;
layoutEngine.NodeHeight = preferredHeight;
layoutEngine.HorizontalSpacing = minHDistance;
layoutEngine.VerticalSpacing = minVDistance;
var actualRoot = tree.Root;
if (actualRoot.Symbol is ProgramRootSymbol && actualRoot.SubtreeCount == 1)
{
actualRoot = tree.Root.GetSubtree(0);
}
var visualNodes = layoutEngine.CalculateLayout(actualRoot, Width, Height).ToList();
visualTreeNodes = visualNodes.ToDictionary(x => x.Content, x => x);
visualLines = new Dictionary <Tuple <ISymbolicExpressionTreeNode, ISymbolicExpressionTreeNode>, VisualTreeNodeConnection>();
foreach (var node in visualNodes.Select(n => n.Content))
{
foreach (var subtree in node.Subtrees)
{
visualLines.Add(new Tuple <ISymbolicExpressionTreeNode, ISymbolicExpressionTreeNode>(node, subtree), new VisualTreeNodeConnection());
}
}
}
