public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
{
Thickness margin = new Thickness(0);
PointCollection connectorPoints = values[0] as PointCollection;
// 8 and 4 is calcuated from the margin / padding settings related to the label in xaml
double labelBorderWidth = (double)values[1] + 8;
double labelBorderHeight = (double)values[2] + 4;
if (connectorPoints != null)
{
int longestSegmentIndex;
DesignerGeometryHelper.LongestSegmentLength(connectorPoints, out longestSegmentIndex);
if (longestSegmentIndex >= 0)
{
Point labelLocation = DesignerGeometryHelper.MidPointOfLineSegment(connectorPoints[longestSegmentIndex], connectorPoints[longestSegmentIndex + 1]);
labelLocation.X = (int)(labelLocation.X - labelBorderWidth / 2 + EPS);
labelLocation.Y = (int)(labelLocation.Y - labelBorderHeight / 2 + EPS);
margin.Top = labelLocation.Y;
margin.Left = labelLocation.X;
}
}
return(margin);
}
