/// <summary>
/// This method establishes a link between current thumb and target thumb using a predefined line geometry
/// Note: this is commonly to be used for drawing links with mouse when the line object is predefined outside this class
/// </summary>
/// <param name="target">target thumb</param>
/// <param name="line">Line Geometry </param>
/// <returns>true or false</returns>
public bool LinkTo(RoiThumb target, LineGeometry line)
{
// Save as starting line for current thumb
this.StartLines.Add(line);
// Save as ending line for target thumb
target.EndLines.Add(line);
// Ensure both tumbs the latest layout
this.UpdateLayout();
target.UpdateLayout();
// Update line position
line.StartPoint = new Point(Canvas.GetLeft(this) + (this.ActualWidth / 2), Canvas.GetTop(this) + (this.ActualHeight / 2));
line.EndPoint = new Point(Canvas.GetLeft(target) + (target.ActualWidth / 2), Canvas.GetTop(target) + (target.ActualHeight / 2));
return(true);
}
/// <summary>
/// Returns a line geometry with updated positions to be processed outside.
/// This method establishes a link between current thumb and specified thumb.
/// </summary>
/// <param name="target">target thumb</param>
/// <returns>Line Geometry </returns>
public LineGeometry LinkTo(RoiThumb target)
{
// Create new line geometry
var line = new LineGeometry();
// Save as starting line for current thumb
this.StartLines.Add(line);
// Save as ending line for target thumb
target.EndLines.Add(line);
// Ensure both tumbs the latest layout
this.UpdateLayout();
target.UpdateLayout();
// Update line position
line.StartPoint = new Point(Canvas.GetLeft(this) + (this.ActualWidth / 2), Canvas.GetTop(this) + (this.ActualHeight / 2));
line.EndPoint = new Point(Canvas.GetLeft(target) + (target.ActualWidth / 2), Canvas.GetTop(target) + (target.ActualHeight / 2));
// return line for further processing
return(line);
}