public ConnectionLine CalculateBestConnection(Area fromArea, Area destinationArea, Func<Area, ProximityTestResult> isOverlappingWithOtherControls)
{
var fromConnectors = GetAllConnectorPoints(fromArea, false);
var toLineEndConnectors = GetAllConnectorPoints(destinationArea, true);
var toArrowTipConnectors = GetAllConnectorPoints(destinationArea, false);
// Logger.Instance.WriteEntry("Finding Best Connection Line from {0} to {1}", (fromArea.Tag ?? fromArea.TopLeft.ToString()), (destinationArea.Tag ?? destinationArea.TopLeft.ToString()));
// Logger.Instance.WriteEntry(" From: {0} To: {1}", fromArea, destinationArea);
double angle = fromArea.Centre.AngleToPointInDegrees(destinationArea.Centre);
var idealPoint = fromArea.CalculateCircumferenceIntersectionPoint(angle);
var chosenfromConnector = fromConnectors.Select(fromConnector => new Tuple<KeyValuePair<int, Point>, double>(fromConnector, fromConnector.Value.DistanceTo(idealPoint)))
.OrderBy(x => x.Item2)
.First();
var toConnectorsInOrderOfPreference = toLineEndConnectors.Select(toConnector => new Tuple<KeyValuePair<int, Point>, double>(toConnector, toConnector.Value.DistanceTo(idealPoint)))
.OrderBy(x => x.Item2)
.ToList();
// This code checks to see if the arrow head is overlapping with an existing diagram element. (not really needed)
//int chosenToIndex = 0;
//for (int toConnectorIndex = 0; toConnectorIndex < toConnectors.Length; toConnectorIndex++)
//{
// var toConnector = toConnectorsInOrderOfPreference[toConnectorIndex];
// Area arrowheadArea = ArrowHead.GetArea(CalculateExitAngle(toConnectorIndex), toConnector.Item1);
// ProximityTestResult proximityTestResult = isOverlappingWithOtherControls(arrowheadArea);
// if (proximityTestResult.Proximity == Proximity.NotOverlapping || proximityTestResult.Proximity == Proximity.VeryClose)
// {
// chosenToIndex = toConnectorIndex;
// break;
// }
//}
return new ConnectionLine
{
Distance = chosenfromConnector.Item1.Value.DistanceTo(toConnectorsInOrderOfPreference[0].Item1.Value),
From = chosenfromConnector.Item1.Value,
To = toArrowTipConnectors[toConnectorsInOrderOfPreference[0].Item1.Key], // toConnectorsInOrderOfPreference[0].Item1.Value, // Incorrect
ToLineEnd = toConnectorsInOrderOfPreference[0].Item1.Value,
ExitAngle = CalculateExitAngle(toConnectorsInOrderOfPreference[0].Item1.Key)
};
}
/// <summary>
/// Calculate the best line connecting <see cref="fromArea"/> to <see cref="destinationArea"/>
/// </summary>
/// <param name="fromArea">
/// The from Area.
/// </param>
/// <param name="destinationArea">
/// The destination Area.
/// </param>
/// <param name="isOverlappingWithOtherControls">
/// The is Overlapping With Other Controls.
/// </param>
/// <returns>
/// The <see cref="ConnectionLine"/>.
/// </returns>
public ConnectionLine CalculateBestConnection(Area fromArea, Area destinationArea, Func<Area, ProximityTestResult> isOverlappingWithOtherControls)
{
double fromAngle = fromArea.Centre.AngleToPointInDegrees(destinationArea.Centre);
Point fromIdealPoint = fromArea.CalculateCircumferenceIntersectionPoint(fromAngle);
double toAngle = TrigHelper.InverseAngle(fromAngle);
Point toIdealPoint = destinationArea.CalculateCircumferenceIntersectionPoint(toAngle);
Point toLineEnd = toIdealPoint;
// Leave room for arrow head
double offset1 = (ArrowHead.ArrowWidth - 2) * Math.Sin(CalculateLineAngleToPreviousAxis(toAngle));
double offset2 = (ArrowHead.ArrowWidth - 2) * Math.Cos(CalculateLineAngleToPreviousAxis(toAngle));
if (toAngle >= 0 && toAngle < 90)
{
toLineEnd.Offset(offset1, -offset2);
}
else if (toAngle >= 90 && toAngle <= 180)
{
toLineEnd.Offset(offset2, offset1);
}
else if (toAngle > 180 && toAngle < 270)
{
toLineEnd.Offset(-offset1, offset2);
}
else
{
toLineEnd.Offset(-offset2, -offset1);
}
return new ConnectionLine
{
Distance = fromIdealPoint.DistanceTo(toIdealPoint),
ExitAngle = CalculateExitAngle(fromAngle),
From = fromIdealPoint,
To = toIdealPoint,
ToLineEnd = toLineEnd,
ToAngle = toAngle,
FromAngle = fromAngle,
};
}
