Author: Tomas Rutkauskas

How to search up and down in a TListView

Answer:

1   procedure TRememberMenu.FindDialog1Find(Sender: TObject);
2   var
3     MaxLines, Adder, CurrentLine, X: Integer;
4     LookText: string;
5     Found: Boolean;
6   begin
7     {Find the word}
8     Found := False;
9     MaxLines := ListView1.Items.Count - 1;
10    LookText := UpperCase(FindDialog1.FindText);
11    if ListView1.Selected <> nil then
12      CurrentLine := TListItem(ListView1.Selected).Index
13    else
14      CurrentLine := 0;
15    X := CurrentLine;
16    if frDown in FindDialog1.Options then
17    begin
18      Adder := 1;
19    end
20    else
21    begin
22      Adder := -1;
23    end;
24    X := X + Adder;
25    if (X >= 0) and (X <= MaxLines) then
26    begin
27      repeat
28        begin
29          if Pos(LookText, UpperCase(ListView1.Items[X].Caption)) <> 0 then
30          begin
31            Found := True;
32            ListView1.Selected := nil;
33            ListView1.Selected := ListView1.Items[X];
34            ListView1.Items[X].MakeVisible(False);
35            ListView1.SetFocus;
36          end;
37          X := X + Adder;
38        end;
39      until
40        (X > MaxLines) or (Found) or (X < 0);
41    end;
42    if Found = False then
43    begin
44      SoundBeep;
45    end;
46  end;