unit mainFrm;

{$mode objfpc}{$H+}

interface

uses
  Classes, SysUtils, sqlite3conn, sqldb, db, FileUtil, Forms, Controls,
    Graphics, Dialogs, DBGrids, DbCtrls, StdCtrls, ExtCtrls, LCLType, Menus,
    ComCtrls;

type

  { TMainForm }

  TMainForm = class(TForm)
    Button1: TButton;
    DS: TDataSource;
    DBGrid1: TDBGrid;
    DBNavigator1: TDBNavigator;
    Conn: TSQLite3Connection;
    Edit1: TEdit;
    MainMenu1: TMainMenu;
    MenuItem1: TMenuItem;
    menuClose: TMenuItem;
    MenuItem3: TMenuItem;
    menuAbout: TMenuItem;
    Panel1: TPanel;
    PopupMenu1: TPopupMenu;
    SQL: TSQLQuery;
    SB1: TStatusBar;
    SQL1: TSQLQuery;
    Tran: TSQLTransaction;
    procedure Button1Click(Sender: TObject);
    procedure DBGrid1KeyUp(Sender: TObject; var Key: Word; Shift: TShiftState);
    procedure DBNavigator1Click(Sender: TObject; Button: TDBNavButtonType);
    procedure FormCreate(Sender: TObject);
    procedure menuAboutClick(Sender: TObject);
    procedure menuCloseClick(Sender: TObject);
  private
    { private declarations }
  public
    { public declarations }
  end;

var
  MainForm: TMainForm;

implementation

{$R *.lfm}

{ TMainForm }

procedure TMainForm.DBGrid1KeyUp(Sender: TObject; var Key: Word; Shift: TShiftState
        );
begin
  if (key=VK_RETURN) then
  begin
    SQL.UpdateMode:= UpWhereChanged;
    SQL.ApplyUpdates;
    Tran.Commit;
    SQL.Close;
    SQL.Open;
  end;
end;

procedure TMainForm.Button1Click(Sender: TObject);
begin
  SQL1.Close;
  SQL1.SQL.Text:='CREATE TABLE :TName(ID INT PRIMARY KEY NOT NULL, NAME TEXT NOT NULL, AGE INT NOT NULL, ADDRESS CHAR(50), SALARY REAL)';
  SQL1.Params.ParamByName('TName').AsString:= Edit1.Text;
  SQL1.Open;
end;

procedure TMainForm.FormCreate(Sender: TObject);
begin
  SQL.Close;
  SQL.Open;
  DBGrid1.Columns[0].Visible:= false;
  SB1.SimpleText:='Database loaed';
end;

procedure TMainForm.menuAboutClick(Sender: TObject);
begin

end;

procedure TMainForm.menuCloseClick(Sender: TObject);
begin
   Conn.Connected:= false;
   SQL.Close;
   SQL1.Close;
end;

procedure TMainForm.DBNavigator1Click(Sender: TObject; Button: TDBNavButtonType);
begin
  Case Button of
    nbInsert:
            begin
            DBGrid1.SetFocus;
        end;
    nbPost:
                begin
                try
                   SQL.Edit;
                   SQL.UpdateMode:= UpWhereChanged;
                   SQL.ApplyUpdates;
                   Tran.Commit;
                   SQL.Close;
                   SQL.Open;
        except
                   On E: EDatabaseError do
                   begin
                      MessageDlg('Error','A Database Error.  Technical Message -> '+E.Message,mtError,[mbOK],0);
           end;
            end;
                end;
    nbDelete:
                begin
                try
                  SQL.Edit;
                  SQL.UpdateMode:= upWhereAll;
                  SQL.ApplyUpdates;
                  Tran.Commit;
                  SQL.Close;
                  SQL.Open;
            except
                  On E: EDatabaseError do
                  begin
                    MessageDlg('Error','A Database Error.  Technical Message -> '+E.Message,mtError,[mbOK],0);
              end;
            end;
                end;
    nbCancel:
                begin
                   SQL.Close;
                   SQL.Open;;
            end;
    nbRefresh:
                begin
                   SQL.Close;
                   SQL.Open;
            end;
  end;
end;

end.