/// <summary>
/// Organizes the shapes added with <see cref="AddShape(ShapeElement)"/> or similar methods.
/// </summary>
/// <param name="ignoreExistingShapes">Do not adjust for existing shapes</param>
/// <param name="referenceShape">Layout shapes to the right of this shape.</param>
/// <param name="layoutRightOfReferenceShape">Set to layout to the right of the <paramref name="referenceShape"/></param>
/// <param name="layoutBelowReferenceShape">Set to layout below the <paramref name="referenceShape"/></param>
public void Layout(bool ignoreExistingShapes, NodeShape referenceShape, bool layoutRightOfReferenceShape, bool layoutBelowReferenceShape)
{
LayoutShape backupRoot = null;
LayoutShapeList allShapes = myLayoutShapes;
switch (allShapes.Count)
{
case 0:
return;
default:
backupRoot = allShapes[0];
break;
}
myLayoutEngine.LateBind(myDiagram, allShapes);
SizeD margin = myDiagram.NestedShapesMargin;
if (referenceShape != null &&
(layoutRightOfReferenceShape || layoutBelowReferenceShape))
{
RectangleD referenceBounds = referenceShape.AbsoluteBounds;
if (layoutRightOfReferenceShape)
{
margin.Width = Math.Max(margin.Width, referenceBounds.Right);
}
if (layoutBelowReferenceShape)
{
margin.Height = Math.Max(margin.Height, referenceBounds.Bottom);
}
}
PointD minimumPoint = new PointD(margin.Width, margin.Height);
RectangleD layoutRectangle = new RectangleD(minimumPoint, SizeD.Empty);
bool firstPass = true;
for (; ;)
{
LayoutShape mostRelatives = myLayoutEngine.ResolveReferences(allShapes);
LayoutShape root = null;
// If the root shape was set by the user, AND the shape exists in our shape list
if (myRootShape == null || !allShapes.TryGetValue(myRootShape, out root))
{
root = GetRoot(mostRelatives);
}
if (root == null)
{
if (backupRoot == null)
{
myLayoutEngine.PostLayout(minimumPoint);
break;
}
root = backupRoot;
}
// run the layout of base shapes
myLayoutEngine.PerformLayout(root, new PointD(margin.Width, layoutRectangle.Bottom + (firstPass ? 0 : root.Shape.Size.Height)), ref layoutRectangle);
firstPass = false;
backupRoot = null;
myRootShape = null;
}
Reflow(ignoreExistingShapes);
}