private void DeleteEdge(CanvasEdge canvasEdge)
{
List<Node> nodesList = CanvasItems.GetAllNodes();
foreach (Node node in nodesList)
{
node.Edges.Remove(canvasEdge.Edge);
}
CanvasItems.Remove(canvasEdge);
}
private void CorrectEdgePosition(CanvasRectangle rectStart, CanvasRectangle rectEnd, CanvasEdge canvasEdge, bool isTwoSide = false)
{
double x1 = rectStart.CanvasLeft + RectangleSize / 2;
double y1 = rectStart.CanvasTop + RectangleSize / 2;
double x2 = rectEnd.CanvasLeft + RectangleSize / 2;
double y2 = rectEnd.CanvasTop + RectangleSize / 2;
double angleStart;
double angleEnd;
double twoSideAdjustment = 0; // When there are edges in both directions, their position on the circle must be additionally adjusted...
if (isTwoSide)
twoSideAdjustment = 25; // ... by a value of 25/50 degrees (depends on edge direction)
if (x1 <= x2)
{
angleStart = MathHelper.GetLineAngle(x1, y1, x2, y2) - MathHelper.AlfaToRadian(twoSideAdjustment);
angleEnd = angleStart + MathHelper.AlfaToRadian(180) + MathHelper.AlfaToRadian(twoSideAdjustment * 2);
}
else
{
angleEnd = MathHelper.GetLineAngle(x1, y1, x2, y2) + MathHelper.AlfaToRadian(twoSideAdjustment);
angleStart = angleEnd + MathHelper.AlfaToRadian(180) - MathHelper.AlfaToRadian(twoSideAdjustment * 2);
}
Point newStartPoint = MathHelper.GetPointOnCircle(x1, y1, angleStart, 15); // can't be helped ;(
Point newEndPoint = MathHelper.GetPointOnCircle(x2, y2, angleEnd, 15);
canvasEdge.X1 = newStartPoint.X;
canvasEdge.Y1 = newStartPoint.Y;
canvasEdge.X2 = newEndPoint.X;
canvasEdge.Y2 = newEndPoint.Y;
}