Prototype

property OnNavigate: TNavigateEvent read FOnNavigate write FOnNavigate;

TNavigateEvent = procedure(Sender :TObject; aHome, aPrevious, aNext :boolean) of object;

Description

Event called every time the user navigates in the document or between documents in order to update a button bar.

Sender is the control that has triggered the event. aHome, aPrevious and aNext indicate which navigation buttons should be enabled or disabled.

Example

procedure TForm1.MDViewer1Navigate(Sender: TObject; aHome, aPrevious, aNext: Boolean);
begin
  bHome.Enabled := aHome;
  bPrevious.Enabled := aPrevious;
  bNext.Enabled := aNext;
end;

See also

GotoHome

GotoNext

GotoPrevious

LoadFromStream

LoadFromURI