whats new ¦  programming tips ¦  indy articles ¦  intraweb articles ¦  informations ¦  links ¦  interviews
 misc ¦  tutorials ¦  Add&Win Game

Tips (1541)

Database (90)
Files (137)
Forms (107)
Graphic (114)
IDE (21)
Indy (5)
Internet / LAN (130)
IntraWeb (0)
Math (76)
Misc (126)
Multimedia (45)
Objects/
ActiveX (51)

OpenTools API (3)
Printing (35)
Strings (83)
System (266)
VCL (242)

Top15

Tips sort by
component


Search Tip

Add new Tip

Add&Win Game

Advertising

82 Visitors Online


 
...move items in a listbox?
Autor: Hammer
[ Print tip ]  

Tip Rating (17):  
     


// Move an item up

procedure LbMoveItemUp(AListBox: TListBox);
var
  
CurrIndex: Integer;
begin
  with 
AListBox do
    if 
ItemIndex > 0 then
    begin
      
CurrIndex := ItemIndex;
      Items.Move(ItemIndex, (CurrIndex - 1));
      ItemIndex := CurrIndex - 1;
    end;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  
LbMoveItemUp(ListBox1);
end;

// Move an item down

procedure LbMoveItemDown(AListBox: TListBox);
var
  
CurrIndex, LastIndex: Integer;
begin
  with 
AListBox do
  begin
    
CurrIndex := ItemIndex;
    LastIndex := Items.Count;
    if ItemIndex <> -1 then
    begin
      if 
CurrIndex + 1 < LastIndex then
      begin
        
Items.Move(ItemIndex, (CurrIndex + 1));
        ItemIndex := CurrIndex + 1;
      end;
    end;
  end;
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
  
LbMoveItemDown(ListBox1);
end;


 

Rate this tip:

poor
very good


Copyright © by SwissDelphiCenter.ch
All trademarks are the sole property of their respective owners