OnFormSelectionRect event

Component: TPdf · Unit: PDFium

Fires for each selection rectangle the form layer reports

Syntax

property OnFormSelectionRect: TPdfFormSelectionRectEvent read FOnFormSelectionRect write FOnFormSelectionRect;

Description

OnFormSelectionRect fires once for each distinct selection rectangle the form layer reports for the focused field. The handler receives a TPdfFormSelectionRect with a one-based PageNumber and page-space Bounds

Consecutive duplicates are suppressed; every reported rectangle is also appended to the list exposed by FormSelectionRects

Remarks

Handler signature: procedure(Sender: TObject; const SelectionRect: TPdfFormSelectionRect) of object
Use the live event for immediate overlay drawing, and FormSelectionRects for batch redraws
Call ClearFormSelectionRects when focus moves to another field

Example

procedure TMain.Pdf1FormSelectionRect(Sender: TObject; const SelectionRect: TPdfFormSelectionRect);
begin
HighlightSelection(SelectionRect.PageNumber, SelectionRect.Bounds);
end;