public void RecalcPositions()
{
DependencyTree <IRectangleSizeDecorator> deps = BuildDependenciesTree();
// 1. Make sure each node's initial size is the same as its rectangle size.
deps.WalkTreeRootFirst(CopyPhysicalSize);
// 2. Arrange the nodes in groups with known width and height.
deps.WalkTreeChildrenFirst(ArrangeNodes);
// 3. Calculate the physical size of all the nodes.
// Treat the nodes decendants as part of the node itself.
//deps.WalkTreeChildrenFirst(CalcPhysicalSizeRecursive);
// 4. Sort everything by its physical size.
//deps.WalkTreeChildrenFirst(SortByPhysicalSize);
// 5. Set the positions of the nodes.
deps.WalkTreeRootFirst(SetupPositions);
deps.WalkTreeRootFirst(MoveSubTreeByParentPosition);
float y = 0;
foreach (DependencyTreeNode <IRectangleSizeDecorator> group in deps.Root.Dependants)
{
if (group.Item == null)
{
continue;
}
MoveSubTreeBy(group, 0, y);
y += group.Item.Height + YSpacing;
}
}
private void MoveSubTreeBy(DependencyTreeNode <IRectangleSizeDecorator> root, float x, float y)
{
DependencyTree <IRectangleSizeDecorator> .WalkTreeRootFirst(
root,
delegate(IRectangleSizeDecorator rect)
{
if (rect == null)
{
return;
}
rect.Rectangle.X += x;
rect.Rectangle.Y += y;
});
}
private DependencyTree <IRectangleSizeDecorator> BuildDependenciesTree()
{
DependencyTree <IRectangleSizeDecorator> deps = new DependencyTree <IRectangleSizeDecorator>();
foreach (Route r in routes)
{
deps.AddDependency(new IRectangleSizeDecorator(r.From),
new IRectangleSizeDecorator(r.To));
}
foreach (IRectangle r in rects)
{
deps.AddDependency(new IRectangleSizeDecorator(r), deps.Root.Item);
}
return(deps);
}