Zoom a Stringgrid

Author: admin | Category: Tips and Tricks, VCL

In this delphi example tutorial we will make an application contain a Stringgrid (TStringgrid) and two Button (TButton). The Stringgrid will be enable for zooming in and zooming out. Firt button will execute a procedure for Zoom In and the other one will execute Zoom Out Procedure. Here the screenshot:

And this is the code:

unit Unit1;
 
interface
 
uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, Grids, StdCtrls;
 
type
  TForm1 = class(TForm)
    StringGrid1: TStringGrid;
    Button1: TButton;
    Button2: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;
 
var
  Form1: TForm1;
 
implementation
 
{$R *.dfm}
 
procedure ZoomGrid(AStringgrid:TStringGrid;level:Real);
var
  i:integer;
begin
  for i := 0 to AStringgrid.colcount - 1 do
    AStringgrid.colwidths[i] := round(AStringgrid.colwidths[i] * level);
 
  for i := 0 to AStringgrid.RowCount - 1 do
    AStringgrid.rowheights[i] := round(AStringgrid.rowheights[i] * level);
 
  AStringgrid.Font.Size := round(AStringgrid.rowheights[0] * 0.65);
end;
 
procedure TForm1.Button1Click(Sender: TObject);
begin
  ZoomGrid(StringGrid1,1.1);
end;
 
procedure TForm1.Button2Click(Sender: TObject);
begin
  ZoomGrid(StringGrid1,0.9);
end;
 
end.

Tags: StringGrid, zoom