Delphi - AutoComplete Memo

Question

I am requiring a Memo with Auto-completion functionality. Ultimately, I would like the ability to display a custom auto-completion list when the user presses a hotkey (Ctrl-space) similar to Delphi IDE auto-completion.

I have the TMS AdvMemo, but to be honest the help for this particular component is lacking. It appears the AdvMemo supports custom auto completion, but I cant seem to find out how to display a list.

So, if anyone has any suggestions to achieve auto completion on a memo, or to enlighten me as the use of the AdvMemo, it would be appreciated

Answer 1

I decided to write some handlers for a TMemo using a TPopupmenu as the autocomplete list.

For those that read this please refer to my other post: Delphi - Get the whole word where the caret is in a memo (thanks to RRUZ)

And the following code: OnPopup for the AutoComplete TPopupMenu: (memoAutoComplete hold the list of autocomplete items)

procedure AutoCompletePopup(Sender: TObject);
var i : integer;
NewItem : TMenuItem;
AutoCompleteToken: String;
begin
    //filter list by token
    AutoCompleteToken := SelectWordUnderCaret(edtComment);
    AutoComplete.Items.Clear;
    for i:=0 to memoAutoComplete.Lines.Count -1 do
    begin
         if SameText(LeftStr(memoAutoComplete.Lines.Strings[i],Length(AutoCompleteToken)),AutoCompleteToken) then
         begin
             NewItem := TMenuItem.Create(AutoComplete);
             NewItem.Caption := memoAutoComplete.Lines.Strings[i];
             NewItem.OnClick := AutoComplete1Click;
             NewItem.OnMeasureItem := AutoComplete1MeasureItem;
             NewItem.OnAdvancedDrawItem := AutoComplete1AdvancedDrawItem;
             AutoComplete.Items.Add(NewItem);
         end;
    end;
end;

And for the Tmemo:

procedure Memo1KeyDown(Sender: TObject; var Key: Word;
  Shift: TShiftState);
var pt : TPoint;
begin
     if (Key = VK_SPACE) and (GetKeyState(VK_CONTROL) < 0) then
     begin
          pt := Memo1.ClientToScreen(Point(0,Memo1.Height));
          AutoComplete.Popup(pt.X,pt.Y);
     end;
end;

Answer 2

You can have a look at SynEdit. It's free, open source and has an active community to help you out when you get stuck.