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Add a horizontal scrollbar to a listbox
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Email
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| Submitted on: |
8/5/2000 11:56:06 PM |
| By: |
Bryan Hammond
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| Level: |
Intermediate |
| User Rating: |
By 1 Users |
| Compatibility: |
Delphi 5, Delphi 4 |
| Views: |
19644 |
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This code will add a horizontal scrollbar to a standard TListBox component using win32 api.
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procedure TForm1.Timer1Timer(Sender: TObject); var i,len,width: integer; begin with listbox1 do begin width := 0; for i := 0 to items.count -1 do begin len := canvas.textwidth(items[i]); if len > width then width := len; end; //set listbox's horizontal scrollbar width Perform(LB_SETHORIZONTALEXTENT,width+100,0); end; end;
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Other 3 submission(s) by this author
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Your Vote
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Other User Comments
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 10/11/2000 3:02:20 AM: Nicky Sciberras
I think that the variable 'width' should be changed to something else (eg width1) as it is effecting the listbox's width as it is.
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4/10/2002 11:49:02 AM: samar
its really help ful for me as i am beginer in delphi
so
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5/10/2002 3:22:06 AM: Petr Langer
boxlen := listbox.Perform(LB_GETHORIZONTALEXTENT, 0, 0) can also be useful for getting scrollbar size.
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7/23/2004 1:46:23 PM: Che Guevara
procedure TForm1.Timer1Timer(Sender: TObject);
var
i, len, width1: integer;
begin
with lstDir do
begin
width1 := 0;
for i := 0 to items.count -1 do
begin
len := canvas.textwidth(items[i]);
if len > width1 then width1 := len;
end;
Perform(LB_SETHORIZONTALEXTENT,width1+100,0);
end;
end;
//I renamed the var width to width1 other wise the listboxes width will interfear with the variable.
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7/23/2004 1:48:43 PM: Che Guevara
add:
I wreckon that this code would be better off on the listboxes OnChange event than a timer.
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1/21/2005 8:06:22 PM: Shane Mc Cormack
But there is no OnChange event for TListBox
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8/9/2005 7:57:49 AM: Ngnhuman
It'll be better if you change procedure TTime1.Time by procedure Form1.FormCreate
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