TReplaceDialog.OnReplace Event

Occurs when the user clicks the Replace or Replace All button.

Pascal

property OnReplace;

C++

__property OnReplace;

Description

OnReplace occurs whenever the user clicks Replace or Replace All. In addition, when the user clicks Replace, the frReplace flag is set (and the frReplaceAll flag is turned off) in Options. When the user clicks ReplaceAll, the frReplaceAll flag is set (and the frReplace flag is turned off) in Options.

Write an OnReplace event handler that searches for the text specified in FindText and replaces it with the text in ReplaceText. Use the Options flags to determine how the search is conducted.

C++ Examples:

Copy Code

/*
The following event handler searches a TMemo object called
Memo1 and replaces FindText with ReplaceText. It uses
TMemo’s SelStart, SelLength, and SelText properties.
*/
void __fastcall TForm1::ReplaceDialog1Replace(TObject *Sender)
{
  TReplaceDialog *dlg = dynamic_cast<TReplaceDialog *>(Sender);
  /* perform a global case-sensitive search for FindText in Memo1 */
  int SelPos = Memo1->Lines->Text.Pos(dlg->FindText);
  if (SelPos > 0)
  {
    Memo1->SelStart = SelPos - 1;
    Memo1->SelLength = dlg->FindText.Length();
    // Replace selected text with ReplaceText
    Memo1->SelText = dlg->ReplaceText;
  }
  else
    MessageBeep(0);
}

Delphi Examples:

Copy Code

{
The following event handler searches a TMemo object called
Memo1 and replaces FindText with ReplaceText. It uses
TMemo’s SelStart, SelLength, and SelText properties.
}
procedure TForm1.ReplaceDialog1Replace(Sender: TObject);
var
  SelPos: Integer;
begin
  with TReplaceDialog(Sender) do
  begin
  { Perform a global case-sensitive search for FindText in Memo1 }
    SelPos := Pos(FindText, Memo1.Lines.Text);
    if SelPos > 0 then
    begin
      Memo1.SelStart := SelPos - 1;
      Memo1.SelLength := Length(FindText);
      { Replace selected text with ReplaceText }
      Memo1.SelText := ReplaceText;
    end
    else MessageDlg(Concat('Could not find "', FindText, '" in Memo1.'), mtError, [mbOk], 0);
  end;
end;