private MG.GeometryGraph CreateMSAGLGraph(DGMODEL.Drawing layout_diagram)
{
var msagl_graph = new MG.GeometryGraph();
var defsize = new VA.Drawing.Size(this.LayoutOptions.DefaultShapeSize.Width,
this.LayoutOptions.DefaultShapeSize.Height);
// Create the nodes in MSAGL
foreach (var layout_shape in layout_diagram.Shapes)
{
var nodesize = ToMSAGLCoordinates(layout_shape.Size ?? defsize);
var msagl_node = new MG.Node(layout_shape.ID,
MG.Splines.CurveFactory.CreateBox(nodesize.Width, nodesize.Height,
new MG.Point()));
msagl_graph.AddNode(msagl_node);
msagl_node.UserData = layout_shape;
}
bool connectors_ok = this.validate_connectors(layout_diagram);
// TODO: What to do if connectors_ok is false?
var msagl_size = this.ToMSAGLCoordinates(DefaultBezierConnectorLabelBoxSize);
// Create the MSAGL Connectors
foreach (var layout_connector in layout_diagram.Connectors)
{
if (layout_connector.From == null)
{
throw new System.ArgumentException("Connector's From node is null");
}
if (layout_connector.To == null)
{
throw new System.ArgumentException("Connector's To node is null");
}
var from_node = msagl_graph.NodeMap[layout_connector.From.ID];
var to_node = msagl_graph.NodeMap[layout_connector.To.ID];
var new_edge = new MG.Edge(from_node, to_node);
new_edge.ArrowheadAtTarget = false;
new_edge.UserData = layout_connector;
msagl_graph.AddEdge(new_edge);
new_edge.Label = new Microsoft.Msagl.Label(msagl_size.Width, msagl_size.Height, new_edge);
}
msagl_graph.CalculateLayout();
this.msagl_bb = new VA.Drawing.Rectangle(
msagl_graph.BoundingBox.Left,
msagl_graph.BoundingBox.Bottom,
msagl_graph.BoundingBox.Right,
msagl_graph.BoundingBox.Top);
this.layout_bb = new VA.Drawing.Rectangle(0, 0, this.msagl_bb.Width, msagl_bb.Height)
.Multiply(ScaleToDocument, ScaleToDocument);
return(msagl_graph);
}
private VA.DOM.BezierCurve draw_edge_bezier(
VA.DOM.ShapeList page,
DGMODEL.Connector connector,
MG.Edge edge)
{
var final_bez_points =
VA.Internal.MSAGLUtil.ToVAPoints(edge).Select(p => ToDocumentCoordinates(p)).ToList();
var bez_shape = new VA.DOM.BezierCurve(final_bez_points);
return(bez_shape);
}
public static IList <VA.Drawing.Point> ToVAPoints(MG.Edge edge)
{
var final_bez_points = new List <VA.Drawing.Point> {
ToVAPoint(edge.Curve.Start)
};
var curve = (MG.Splines.Curve)edge.Curve;
foreach (var cur_seg in curve.Segments)
{
if (cur_seg is MG.Splines.CubicBezierSegment)
{
var bezier_seg = (MG.Splines.CubicBezierSegment)cur_seg;
var bez_points =
new[] { 0, 1, 2, 3 }
.Select(bezier_seg.B)
.Select(ToVAPoint)
.ToArray();
final_bez_points.AddRange(bez_points.Skip(1));
}
else if (cur_seg is MG.Splines.LineSegment)
{
var line_seg = (MG.Splines.LineSegment)cur_seg;
final_bez_points.Add(ToVAPoint(line_seg.Start));
final_bez_points.Add(ToVAPoint(line_seg.End));
final_bez_points.Add(ToVAPoint(line_seg.End));
}
else
{
throw new System.InvalidOperationException("Unsupported Curve Segment type");
}
}
return(final_bez_points);
}