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...show proportional thumbs in a TScrollbar/TStringGrid?
Autor: P. Below
Homepage: http://www.teamb.com
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Tip Rating (16):  
     


// Getting a TScrollbar control to Show a proportional thumb:

procedure TForm1.Button1Click(Sender: TObject);
var
  
info: TScrollInfo;
begin
  
FillChar(info, SizeOf(info), 0);
  with info do
  begin
    
cbsize := SizeOf(info);
    fmask  := SIF_PAGE;
    nPage  := ScrollBar1.LargeChange;
  end;
  SetScrollInfo(ScrollBar1.Handle, SB_CTL, info, True);
end;

// Same for a TStringGrid

procedure TForm1.Button1Click(Sender: TObject);
var
  
info: TScrollInfo;
begin
  
FillChar(info, SizeOf(info), 0);
  with info do
  begin
    
cbsize := SizeOf(info);
    fmask  := SIF_ALL;
    GetScrollInfo(StringGrid1.Handle, SB_VERT, info);
    fmask := fmask or SIF_PAGE;
    nPage := 5 * (nmax - nmin) div StringGrid1.RowCount;
    // whatever number of cells you consider a "page"
  
end;
  SetScrollInfo(StringGrid1.Handle, SB_VERT, info, True);
end;


 

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