unit tblcomment;


// -------------------------------------
// Edit table-comment
// -------------------------------------


interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  StdCtrls, ExtCtrls;

type
  Ttablecomment = class(TForm)
    Label1: TLabel;
    EditComment: TEdit;
    ButtonOK: TButton;
    ButtonCancel: TButton;
    Bevel1: TBevel;
    ComboBoxTableName: TComboBox;
    procedure ButtonCancelClick(Sender: TObject);
    procedure ButtonOKClick(Sender: TObject);
    procedure FormShow(Sender: TObject);
    procedure ComboBoxTableNameChange(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

  function tablecommentWindow(AOwner: TComponent): Boolean;

implementation

uses Childwin, helpers, Main;

{$R *.DFM}

{**
  Create form on demand
  @param TComponent Owner of form (should be calling form)
  @return Boolean Form closed using modalresult mrOK
}
function tablecommentWindow(AOwner: TComponent): Boolean;
var
  f : Ttablecomment;
begin
  f := Ttablecomment.Create(AOwner);
  Result := (f.ShowModal=mrOK);
  FreeAndNil(f);
end;


procedure Ttablecomment.ButtonCancelClick(Sender: TObject);
begin
  close;
end;

procedure Ttablecomment.ButtonOKClick(Sender: TObject);
begin
  screen.Cursor := crHourGlass;
  Mainform.Childwin.ExecUpdateQuery('ALTER TABLE ' + mainform.mask(ComboBoxTableName.Text) + ' COMMENT = ' + esc(EditComment.Text));
  Mainform.Childwin.ShowDBProperties(self);
  close;
end;

procedure Ttablecomment.FormShow(Sender: TObject);
var i : integer;
begin
  // read tables
//  messagedlg('sdf',mtwarning, [], 0);
  ComboBoxTableName.Items.Clear;
  for i:=0 to Mainform.Childwin.ListTables.Items.Count-1 do
    ComboBoxTableName.Items.Add( Mainform.Childwin.ListTables.Items[i].Caption );
  ComboBoxTableName.ItemIndex := Mainform.Childwin.ListTables.Selected.Index;
  ComboBoxTableNameChange( self );
end;

procedure Ttablecomment.ComboBoxTableNameChange(Sender: TObject);
begin
  EditComment.Text := Mainform.Childwin.GetNamedVar(
    'SHOW TABLE STATUS LIKE ''' + ComboBoxTableName.Text + '''',
    'Comment'
  );
end;

end.