void GoOverOrderedPointsAndAddLabelObstacels(List <PointSet> orderedPoints, List <Point> innerPoints, List <Point> outerPoints, Point wh)
{
foreach (PointSet p in orderedPoints)
{
Point center = p.Center;
innerPoints.Add(p.Inner);
outerPoints.Add(p.Outer);
var r = new RectangleObstacle(new Rectangle(center + wh, center - wh));
AddLabelObstacle(r);
}
}
/// <summary>
/// </summary>
/// <param name="label"></param>
/// <returns></returns>
public bool PlaceEdgeLabelHorizontally(Label label)
{
ValidateArg.IsNotNull(label, "label");
var e = (Edge)label.GeometryParent;
// approximate label with a rectangle
// process candidate points for label ordered by priority
// check candidate point for conflicts - if none then stop and keep placement
label.InnerPoints = null;
List <KeyValuePair <double, Point> > curvePoints = edgePoints[e];
var wh = new Point(label.Width, label.Height);
int bestConflictIndex = -1;
var bestRectangle = new Rectangle();
foreach (int index in ExpandingSearch(StartIndex(label, curvePoints), 0, curvePoints.Count))
{
KeyValuePair <double, Point> cp = curvePoints[index];
ICurve curve = e.Curve ?? new LineSegment(e.Source.Center, e.Target.Center);
Point der = curve.Derivative(cp.Key);
if (der.LengthSquared < ApproximateComparer.DistanceEpsilon)
{
continue;
}
foreach (double side in GetPossibleSides(label.Side, der))
{
Rectangle queryRect = GetLabelBounds(cp.Value, der, wh, side);
int conflictIndex = ConflictIndex(queryRect, label);
if (conflictIndex > bestConflictIndex)
{
bestConflictIndex = conflictIndex;
bestRectangle = queryRect;
// If the best location was found, we're done
if (bestConflictIndex == int.MaxValue)
{
break;
}
}
}
// If the best location was found, we're done
if (bestConflictIndex == int.MaxValue)
{
break;
}
}
if (bestConflictIndex >= 0)
{
SetLabelBounds(label, bestRectangle);
var r = new RectangleObstacle(bestRectangle);
AddLabelObstacle(r);
#if SHARPKIT //https://code.google.com/p/sharpkit/issues/detail?id=371
if (bestConflictIndex == 0)
{
label.PlacementResult = LabelPlacementResult.OverlapsOtherLabels;
}
else if (bestConflictIndex == 1)
{
label.PlacementResult = LabelPlacementResult.OverlapsNodes;
}
else if (bestConflictIndex == 2)
{
label.PlacementResult = LabelPlacementResult.OverlapsEdges;
}
else
{
label.PlacementResult = LabelPlacementResult.OverlapsNothing;
}
#else
label.PlacementResult = (LabelPlacementResult)bestConflictIndex;
#endif
return(true);
}
return(false);
}
