LayOutSmallerComponentsInBins
(
IGraph graph,
ICollection<IVertex> verticesToLayOut,
LayoutContext layoutContext,
out ICollection<IVertex> remainingVertices,
out Rectangle remainingRectangle
)
{
AssertValid();
remainingVertices = null;
remainingRectangle = Rectangle.Empty;
// This method modifies some of the graph's metadata. Save the
// original metadata.
Boolean bOriginalGraphHasBeenLaidOut =
LayoutMetadataUtil.GraphHasBeenLaidOut(graph);
ICollection<IVertex> oOriginalLayOutTheseVerticesOnly =
( ICollection<IVertex> )graph.GetValue(
ReservedMetadataKeys.LayOutTheseVerticesOnly,
typeof( ICollection<IVertex> ) );
// Split the vertices into strongly connected components, sorted in
// increasing order of vertex count.
ConnectedComponentCalculator oConnectedComponentCalculator =
new ConnectedComponentCalculator();
IList< LinkedList<IVertex> > oComponents =
oConnectedComponentCalculator.CalculateStronglyConnectedComponents(
verticesToLayOut, graph, true);
Int32 iComponents = oComponents.Count;
// This object will split the graph rectangle into bin rectangles.
RectangleBinner oRectangleBinner = new RectangleBinner(
layoutContext.GraphRectangle, m_iBinLength);
Int32 iComponent = 0;
for (iComponent = 0; iComponent < iComponents; iComponent++)
{
LinkedList<IVertex> oComponent = oComponents[iComponent];
Int32 iVerticesInComponent = oComponent.Count;
if (iVerticesInComponent> m_iMaximumVerticesPerBin)
{
// The vertices in the remaining components should not be
// binned.
break;
}
Rectangle oBinRectangle;
if ( !oRectangleBinner.TryGetNextBin(out oBinRectangle) )
{
// There is no room for an additional bin rectangle.
break;
}
// Lay out the component within the bin rectangle.
LayOutComponentInBin(graph, oComponent, oBinRectangle);
}
// Restore the original metadata on the graph.
if (bOriginalGraphHasBeenLaidOut)
{
LayoutMetadataUtil.MarkGraphAsLaidOut(graph);
}
else
{
LayoutMetadataUtil.MarkGraphAsNotLaidOut(graph);
}
if (oOriginalLayOutTheseVerticesOnly != null)
{
graph.SetValue(ReservedMetadataKeys.LayOutTheseVerticesOnly,
oOriginalLayOutTheseVerticesOnly);
}
else
{
graph.RemoveKey(ReservedMetadataKeys.LayOutTheseVerticesOnly);
}
if ( oRectangleBinner.TryGetRemainingRectangle(
out remainingRectangle) )
{
remainingVertices = GetRemainingVertices(oComponents, iComponent);
return (remainingVertices.Count > 0);
}
return (false);
}