public override void ApplyLayout(LayoutGraph graph)
{
// determine the single node to keep at the center.
var provider = graph.GetDataProvider("NodeLayouts");
Node centerNode = null;
if (provider != null)
{
centerNode = graph.Nodes.FirstOrDefault(n => provider.Get(n) != null);
}
if (CoreLayout != null)
{
if (centerNode != null)
{
// remember old center
RectD oldLayout = (RectD)provider.Get(centerNode);
var fixedLocation = new YPoint(graph.GetX(centerNode) + graph.GetWidth(centerNode), graph.GetY(centerNode));
//Set to saved size (this is important for collapsed nodes to ensure correct size)
graph.SetSize(centerNode, oldLayout.Width, oldLayout.Height);
// run layout
CoreLayout.ApplyLayout(graph);
// obtain new center
var newFixedLocation = new YPoint(graph.GetX(centerNode) + graph.GetWidth(centerNode),
graph.GetY(centerNode));
// and adjust the layout
LayoutGraphUtilities.MoveSubgraph(graph, graph.GetNodeCursor(), fixedLocation.X - newFixedLocation.X,
fixedLocation.Y - newFixedLocation.Y);
}
else
{
CoreLayout.ApplyLayout(graph);
}
}
}
public LayoutGraphPanel(LayoutGraph graph)
{
if (!GroupingSupport.IsFlat(graph))
{
grouping = new GroupingSupport(graph);
}
this.BackColor = Color.White;
this.BorderStyle = BorderStyle.Fixed3D;
this.AutoScroll = true;
global::yWorks.Algorithms.Geometry.Rectangle2D rect = LayoutGraphUtilities.GetBoundingBox(graph, graph.GetNodeCursor(), graph.GetEdgeCursor());
this.HScroll = true;
this.VScroll = true;
this.layoutGraph = graph;
this.edgePen = new Pen(Brushes.Black, 1);
this.nodeBorderPen = new Pen(Brushes.DarkGray, 1);
this.labelBorderPen = new Pen(Brushes.Red, 1);
this.nodeFillBrush = new SolidBrush(nodeFillColor);
this.labelBrush = Brushes.Black;
this.labelFont = new Font("sansserif", 6);
this.MouseDown += new MouseEventHandler(LayoutGraphPanel_MouseDown);
SetWorldRect(rect.X - insets, rect.Y - insets, rect.Width + insets * 2, rect.Height + insets * 2);
}