public override StateController LeftMouseDownAt(Point point, int times)
{
var(closestEllipse, distanceEllipse) = GraphVisual.ClosestEllipseFrom(point);
var(closestLine, distanceLine) = GraphVisual.ClosestLineFrom(point);
var minDistance = Math.Min(distanceLine, distanceEllipse);
var valueRange = new Range(GraphVisual.NodeWidth / 2.0, GraphVisual.CanvasWidth - GraphVisual.NodeWidth / 2.0);
if (valueRange.Contains(point.X) && valueRange.Contains(point.Y))
{
if (times == 2 && minDistance > GraphVisual.NodeWidth)
{
var nodeValue = Enumerable.Range(1, int.MaxValue).First(x => !GraphVisual.Nodes.ContainsKey(x));
GraphVisual.AddNode(nodeValue, point);
return(this);
}
}
if (times == 1 && distanceEllipse < GraphVisual.NodeWidth)
{
return(StartedLineState.Create(GraphVisual, closestEllipse, point));
}
return(this);
}
public override StateController RightMouseDownAt(Point point, int times)
{
if (times == 2)
{
var(closestEllipse, distanceEllipse) = GraphVisual.ClosestEllipseFrom(point);
if (distanceEllipse < GraphVisual.NodeWidth / 2)
{
GraphVisual.RemoveNode(GraphVisual.Nodes.GetKeyOf(closestEllipse, ReferenceEquals));
}
}
return(this);
}
public override StateController LeftMouseUpAt(Point point)
{
GraphVisual.Canvas.Children.Remove(WorkingLine);
var(closestEllipse, distance) = GraphVisual.ClosestEllipseFrom(point);
if (distance < GraphVisual.NodeWidth && closestEllipse != StartingEllipse)
{
var startingNode = GraphVisual.Nodes.GetKeyOf(StartingEllipse, ReferenceEquals);
var endingNode = GraphVisual.Nodes.GetKeyOf(closestEllipse, ReferenceEquals);
var edge = Edge.Create(startingNode, endingNode, Weight);
if (!GraphVisual.Edges.ContainsKey(edge))
{
GraphVisual.AddEdge(edge);
}
}
return(new IdleState(GraphVisual));
}
