public override bool CalculateCalloutLocation(out PointF location, out CoordinateSystem coordinateSystem)
{
// if the user has manually positioned the callout, we won't override it
if (_manuallyPositionedCallout)
{
location = PointF.Empty;
coordinateSystem = CoordinateSystem.Destination;
return(false);
}
Callout.CoordinateSystem = CoordinateSystem.Destination;
AnnotationSubject.CoordinateSystem = CoordinateSystem.Destination;
try
{
var roiBoundingBox = AnnotationSubject.BoundingBox;
var clientRectangle = AnnotationSubject.ParentPresentationImage.ClientRectangle;
var textSize = Callout.TextBoundingBox.Size;
if (textSize.IsEmpty)
{
textSize = new SizeF(100, 50);
}
coordinateSystem = CoordinateSystem.Destination;
location = new PointF(ComputeCalloutLocationX(textSize, clientRectangle, roiBoundingBox), ComputeCalloutLocationY(textSize, clientRectangle, roiBoundingBox));
}
finally
{
Callout.ResetCoordinateSystem();
AnnotationSubject.ResetCoordinateSystem();
}
return(true);
}
public override bool CalculateCalloutLocation(out PointF location, out CoordinateSystem coordinateSystem)
{
// if the user has manually positioned the callout, we won't override it
if (_manuallyPositionedCallout || Roi.Points.Count == 0)
{
location = PointF.Empty;
coordinateSystem = CoordinateSystem.Destination;
return(false);
}
Callout.CoordinateSystem = CoordinateSystem.Destination;
Roi.CoordinateSystem = CoordinateSystem.Destination;
try
{
var roiPoint1 = Roi.Points[0];
var roiPoint2 = Roi.Points[Roi.Points.Count - 1];
var clientRectangle = Roi.ParentPresentationImage.ClientRectangle;
var textSize = Callout.TextBoundingBox.Size;
if (textSize.IsEmpty)
{
textSize = new SizeF(100, 50);
}
var calloutLocation = new PointF();
calloutLocation.Y = ComputeCalloutLocationY(textSize, clientRectangle, roiPoint1, roiPoint2);
calloutLocation.X = ComputeCalloutLocationX(textSize, clientRectangle, roiPoint1, roiPoint2, calloutLocation.Y);
coordinateSystem = CoordinateSystem.Destination;
location = calloutLocation;
}
finally
{
Callout.ResetCoordinateSystem();
Roi.ResetCoordinateSystem();
}
return(true);
}
