ImageEn, unit imageenview

TImageEnView.CalcSelectionLen

TImageEnView.CalcSelectionLen


Declaration

function CalcSelectionLen(Units: TIEUnits = ieuPixels): double;


Description

Returns the length (perimeter) of current selection.
If the selection is composed of only two points, the line length is returned. If the selection is composed of three or more points, the perimeter is returned.

Note:
This method will not work with mask selections
For units other than ieuPixels, the value will be calculated using the image DPI


Example

procedure TMDIChild.ImageEnView1MouseMove(Sender: TObject; Shift: TShiftState; X, Y: Integer);
begin
  Label1.Caption := 'Area: ' + IntToStr( Round( ImageEnView1.CalcSelectionArea() ));
  Label2.Caption := 'Perimeter: ' + IntToStr( Round( ImageEnView1.CalcSelectionLen() ));
  Label3.Caption := 'Centroid: ' + IntToStr( ImageEnView1.CalcSelectionCentroid.X ) + ',' + IntToStr( ImageEnView1.CalcSelectionCentroid.Y );
end;


See Also

CalcSelectionArea
CalcSelectionCentroid
MeasureUnits