/// <summary>
/// Draws a partially defined graph edge</summary>
/// <param name="fromNode">Source node, or null</param>
/// <param name="fromRoute">Source route, or null</param>
/// <param name="toNode">Destination node, or null</param>
/// <param name="toRoute">Destination route, or null</param>
/// <param name="label">Edge label</param>
/// <param name="endPoint">Endpoint to substitute for source or destination, if either is null</param>
/// <param name="g">Graphics object</param>
public override void Draw(
TNode fromNode,
BoundaryRoute fromRoute,
TNode toNode,
BoundaryRoute toRoute,
string label,
Point endPoint,
D2dGraphics g)
{
// put endpoint into statechart space
var inverse = g.Transform;
inverse.Invert();
PointF end = Matrix3x2F.TransformPoint(inverse, endPoint);
PointF p1;
PointF normal1;
if (fromNode != null)
{
p1 = ParameterToPoint(fromNode.Bounds, fromRoute.Position, out normal1);
}
else
{
p1 = end;
normal1 = new Point();
}
PointF p4;
PointF normal2;
if (toNode != null)
{
p4 = ParameterToPoint(toNode.Bounds, toRoute.Position, out normal2);
}
else
{
p4 = end;
normal2 = new Point();
}
PointF p2, p3;
float d = GetTransitionPoints(p1, normal1, p4, normal2, out p2, out p3);
DrawEdgeSpline(p1, p2, p3, p4, d, m_theme.OutlineBrush, g);
if (!string.IsNullOrEmpty(label))
{
BezierCurve2F curve = new BezierCurve2F(p1, p2, p3, p4);
Vec2F midpoint = curve.Evaluate(0.5f);
g.DrawText(label, m_centerText, new PointF(midpoint.X, midpoint.Y), m_theme.TextBrush);
}
}
/// <summary>
/// Draws a partially defined graph edge</summary>
/// <param name="fromNode">Source node, or null</param>
/// <param name="fromRoute">Source route, or null</param>
/// <param name="toNode">Destination node, or null</param>
/// <param name="toRoute">Destination route, or null</param>
/// <param name="label">Edge label</param>
/// <param name="endPoint">Endpoint to substitute for source or destination, if either is null</param>
/// <param name="g">Graphics object</param>
public override void Draw(
TNode fromNode,
BoundaryRoute fromRoute,
TNode toNode,
BoundaryRoute toRoute,
string label,
Point endPoint,
Graphics g)
{
// put endpoint into statechart space
endPoint = GdiUtil.InverseTransform(g.Transform, endPoint);
Point p1;
Point normal1;
if (fromNode != null)
{
p1 = ParameterToPoint(fromNode.Bounds, fromRoute.Position, out normal1);
}
else
{
p1 = endPoint;
normal1 = new Point();
}
Point p4;
Point normal2;
if (toNode != null)
{
p4 = ParameterToPoint(toNode.Bounds, toRoute.Position, out normal2);
}
else
{
p4 = endPoint;
normal2 = new Point();
}
Point p2, p3;
float d = GetTransitionPoints(p1, normal1, p4, normal2, out p2, out p3);
DrawEdgeSpline(p1, p2, p3, p4, d, m_theme.OutlinePen, g);
BezierCurve2F curve = new BezierCurve2F(p1, p2, p3, p4);
Vec2F midpoint = curve.Evaluate(0.5f);
midpoint.X += 2;
g.DrawString(label, m_theme.Font, m_theme.TextBrush, new PointF(midpoint.X, midpoint.Y));
}
/// <summary>
/// Finds node and/or edge hit by the given point</summary>
/// <param name="graph">Graph to test</param>
/// <param name="priorityEdge">Graph edge to test before others</param>
/// <param name="p">Point to test</param>
/// <param name="g">Graphics object</param>
/// <returns>Hit record containing node and/or edge hit by the given point</returns>
public override GraphHitRecord <TNode, TEdge, BoundaryRoute> Pick(
IGraph <TNode, TEdge, BoundaryRoute> graph,
TEdge priorityEdge,
Point p,
Graphics g)
{
int tolerance = m_theme.PickTolerance;
TNode pickedNode = null;
TEdge pickedEdge = null;
BoundaryRoute fromRoute = null;
BoundaryRoute toRoute = null;
Vec2F v = new Vec2F(p.X, p.Y);
if (priorityEdge != null &&
Pick(priorityEdge, v))
{
pickedEdge = priorityEdge;
}
else
{
foreach (TEdge edge in graph.Edges.Reverse())
{
if (Pick(edge, v))
{
pickedEdge = edge;
break;
}
}
}
foreach (TNode state in graph.Nodes.Reverse())
{
Rectangle bounds = state.Bounds;
bounds.Inflate(tolerance, tolerance);
if (bounds.Contains(p))
{
pickedNode = state;
float position = PointToParameter(bounds, p);
bounds.Inflate(-2 * tolerance, -2 * tolerance);
bool onEdge = !bounds.Contains(p);
if (pickedEdge == null)
{
if (onEdge)
{
// edge of node can be source or destination
fromRoute = new BoundaryRoute(position);
toRoute = new BoundaryRoute(position);
}
}
else // hit on edge and node
{
if (onEdge)
{
if (pickedEdge.FromNode == pickedNode)
{
fromRoute = new BoundaryRoute(position);
}
else if (pickedEdge.ToNode == pickedNode)
{
toRoute = new BoundaryRoute(position);
}
}
}
break;
}
}
IComplexState <TNode, TEdge> complexState = pickedNode as IComplexState <TNode, TEdge>;
if (complexState != null && pickedEdge == null)
{
Rectangle bounds = pickedNode.Bounds;
Rectangle labelBounds = new Rectangle(
bounds.X + CornerRadius,
bounds.Y + Margin,
bounds.Width - 2 * CornerRadius,
m_theme.Font.Height);
if (labelBounds.Contains(p))
{
DiagramLabel label = new DiagramLabel(labelBounds, TextFormatFlags.SingleLine);
return
(new GraphHitRecord <TNode, TEdge, BoundaryRoute>(pickedNode, label));
}
}
return
(new GraphHitRecord <TNode, TEdge, BoundaryRoute>(pickedNode, pickedEdge, fromRoute, toRoute));
}
