TPdfObjectList.FindObjectAt

Declaration

function FindObjectAt(Pt: TDPoint; LimitToType: TPdfObjectType = ptUnknown): Integer; overload;
function FindObjectAt(Pt: TPoint; LimitToType: TPdfObjectType = ptUnknown): Integer; overload;

Description

Returns the index of any object found on the page at the specified position (in terms of PDF points).
Result will be -1 if no object is found.

Note: PDF pages are specified Bottom-Up, i.e. Y=0 refers to the bottom of the page/screen. Y=PageHeight refers to the top of the page/screen

Example

// Select the clicked object
procedure TfrmMain.ImageEnView1MouseDown(Sender: TObject; Button: TMouseButton;
    Shift: TShiftState; X, Y: Integer);
var
  idx: Integer;
  pt: TDPoint;
begin
  pt  := ImageEnView1.PdfViewer.ScrToPage( X, Y, True );
  idx := ImageEnView1.PdfViewer.Objects.FindObjectAt( pt );
  if idx > -1 then
  begin
    ImageEnView1.PdfViewer.Objects.HighlightedIndex := idx;
    ImageEnView1.Invalidate();
  end;
end;

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