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...use a Combobox as a Custom InPlace Editor in StringGrid?
Autor: Thomas Stutz
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Tip Rating (63):  
     


type
  
TForm1 = class(TForm)
    StringGrid1: TStringGrid;
    ComboBox1: TComboBox;
    procedure FormCreate(Sender: TObject);
    procedure ComboBox1Change(Sender: TObject);
    procedure ComboBox1Exit(Sender: TObject);
    procedure StringGrid1SelectCell(Sender: TObject; ACol, ARow: Integer;
      var CanSelect: Boolean);
  end;

var
  
Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.FormCreate(Sender: TObject);
begin
  with 
Combobox1 do
  begin
    
StringGrid1.DefaultRowHeight := Height;
    Visible := False;
    Items.Add('Item1');
    Items.Add('Item2');
    Text := 'Select an item';
  end;
end;

procedure TForm1.ComboBox1Change(Sender: TObject);
begin
  
StringGrid1.Cells[StringGrid1.Col, StringGrid1.Row] :=
    ComboBox1.Items[ComboBox1.ItemIndex];
  ComboBox1.Visible := False;
  StringGrid1.SetFocus;
end;

procedure TForm1.ComboBox1Exit(Sender: TObject);
begin
  
StringGrid1.Cells[StringGrid1.Col, StringGrid1.Row] :=
    ComboBox1.Items[ComboBox1.ItemIndex];
  ComboBox1.Visible  := False;
  StringGrid1.SetFocus;
end;

procedure TForm1.StringGrid1SelectCell(Sender: TObject; ACol,
  ARow: Integer; var CanSelect: Boolean);
var
  
R: TRect;
begin
  if 
(ACol = 1) and (ARow <> 0) then
  begin
    
R := StringGrid1.CellRect(ACol, ARow);
    R.Left := R.Left + StringGrid1.Left;
    R.Right := R.Right + StringGrid1.Left;
    R.Top := R.Top + StringGrid1.Top;
    R.Bottom := R.Bottom + StringGrid1.Top;
    with Combobox1 do
    begin
      
Left := R.Left + 1;
      Top := R.Top + 1;
      Width := (R.Right + 1) - R.Left;
      Height := (R.Bottom + 1) - R.Top;
      Visible := True;
      SetFocus;
    end;
  end;
  CanSelect := True;
end;


 

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