Changes in TJvDBGrid

  TJvDBGrid = class(TJvExDBGrid)
  private
..
  protected
..
    procedure InternalKeyPress(var Key: Char; AChar: TFieldChars); virtual;
    function SelectCell(ACol, ARow: Integer): overload;
  public
..
  end;


procedure TJvDBGrid.KeyPress(var Key: Char);
const
  cChar = ['A'..'Z', 'a'..'z', ' ', '-', '+', '0'..'9', '.', ',',
    '�', '�', '�', '�', '�', '�', '�', '�', '�', '�', '�', '�', #8];
begin
  // Remark: InplaceEditor is protected in TCustomGrid, published in TJvDBGrid
  // Goal: Allow to go directly into the InplaceEditor when one types the first
  // characters of a word found in the list.
  if not ReadOnly then
    if (Key = #13) and FPostOnEnter then
      DataSource.DataSet.CheckBrowseMode
    else
      if not(Columns[SelectedIndex].ReadOnly) then
        InternalKeyPress(Key,cChar);

  if EditorMode then
    inherited OnKeyPress := FOnKeyPress;
  try
    inherited KeyPress(Key);
  finally
    inherited OnKeyPress := nil;
  end;
end;

procedure TJvDBGrid.InternalKeyPress(var Key: Char; AChar: TFieldChars);
var
  lWord: string;
  lMasterField: TField;
  I, deb: Integer;
begin
  with Columns[SelectedIndex].Field do
    if FieldKind = fkLookup then
    begin
      if (Key in AChar) then
      begin
        if Pos(AnsiUpperCase(FWord), AnsiUpperCase(InplaceEditor.EditText)) <> 1 then
          FWord := '';
        if Key = #8 then
          if (FWord = '') or (Length(FWord) = 1) then
          begin
            lWord := '';
            FWord := '';
          end
          else
            lWord := Copy(FWord, 1, Length(FWord) - 1)
        else
          lWord := FWord + Key;

        LookupDataSet.DisableControls;
        try
          try
            if LookupDataSet.Locate(LookupResultField, lWord, [loCaseInsensitive, loPartialKey]) then
            begin
              DataSet.Edit;
              lMasterField := DataSet.FieldByName(KeyFields);
              if lMasterField.CanModify then
              begin
                lMasterField.Value := LookupDataSet.FieldValues[LookupKeyFields];
                FWord := lWord;
                InplaceEditor.SelStart := Length(FWord);
                InplaceEditor.SelLength := Length(InplaceEditor.EditText) - Length(FWord);
              end;
            end;
          except
            { If you attempt to search for a string larger than what the field
              can hold, and exception will be raised.  Just trap it }
          end;
        finally
          LookupDataSet.EnableControls;
        end;
      end;
    end
    else if FieldKind = fkData then
    begin
      if DataType = ftFloat then
        if Key in ['.', ','] then
          Key := DecimalSeparator;

      if (Key in AChar) and (Columns[SelectedIndex].PickList.Count <> 0) then
      begin
        if Pos(AnsiUpperCase(FWord), AnsiUpperCase(InplaceEditor.EditText)) <> 1 then
          FWord := '';
        if Key = #8 then
          if (FWord = '') or (Length(FWord) = 1) then
          begin
            lWord := '';
            FWord := '';
          end
          else
            lWord := Copy(FWord, 1, Length(FWord) - 1)
        else
          lWord := FWord + Key;

        Key := #0; // De toute fa�on le caract�re est supprim�
        with Columns[SelectedIndex].PickList do
          for I := 0 to Count - 1 do
          begin
            deb := Length(lWord);
            if AnsiUpperCase(lWord) = AnsiUpperCase(Copy(Strings[I], 1, deb)) then
            begin
              DataSet.Edit;

              InplaceEditor.EditText := Strings[I];
              Columns[SelectedIndex].Field.Text := Strings[I];
              InplaceEditor.SelStart := deb;
              InplaceEditor.SelLength := Length(Text) - deb;
              FWord := lWord;

              Break;
            end;
          end;
      end;
    end;
end;

function TJvDBGrid.SelectCell(ACol, ARow: Integer): Boolean;
begin
  FWord:='';
  Result:=inherited SelectCell(ACol, ARow);
end;