evemuproject/evemu_control_panel — pull request #7 by positron96 (2012-12-27 16:43:42+00:00)
Title: Polish of UI logic and DB interface improvement

* ```DBConnect.SQuery()``` returns int (a number of rows affected or -1 if there was an error) TODO: It should throw an exception actually.
* ```bool DBConnect.isConnected()``` replaces ```DBConnect.isConnectionOpen``` field for public interface
* All tabs that require sql are disabled until user connects to sql.
* Most of the tabs do not allow to be switched to if there is no sql connection - and they use one method to do this.