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(*
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* IBX For Lazarus (Firebird Express)
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*
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* The contents of this file are subject to the Initial Developer's
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* Public License Version 1.0 (the "License"); you may not use this
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* file except in compliance with the License. You may obtain a copy
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* of the License here:
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*
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* http://www.firebirdsql.org/index.php?op=doc&id=idpl
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing rights
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* and limitations under the License.
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*
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* The Initial Developer of the Original Code is Tony Whyman.
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*
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* The Original Code is (C) 2015 Tony Whyman, MWA Software
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* (http://www.mwasoftware.co.uk).
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*
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* All Rights Reserved.
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*
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* Contributor(s): ______________________________________.
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*
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*)
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unit Unit1;
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{$mode objfpc}{$H+}
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interface
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uses
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Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs, DBGrids,
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StdCtrls, ActnList, EditBtn, DbCtrls, ExtCtrls, Buttons, IBDatabase, IBQuery,
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IBCustomDataSet, IBSQL, IBDynamicGrid, IBLookupComboEditBox,
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IBLocalDBSupport, db, DBExtCtrls, Menus;
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const
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RequiredVersionNo = 2;
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type
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{ TForm1 }
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TForm1 = class(TForm)
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CheckVersionTablePresent: TIBSQL;
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DBImage1: TDBImage;
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EmployeesPHOTO1: TBlobField;
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GetDBVersionNoQuery: TIBSQL;
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MenuItem6: TMenuItem;
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MenuItem7: TMenuItem;
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Panel3: TPanel;
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Quit: TAction;
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MainMenu1: TMainMenu;
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MenuItem1: TMenuItem;
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MenuItem2: TMenuItem;
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MenuItem3: TMenuItem;
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MenuItem4: TMenuItem;
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MenuItem5: TMenuItem;
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RestoreDatabase: TAction;
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SaveDatabase: TAction;
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NewDatabase: TAction;
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DBEdit6: TDBEdit;
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EmployeesDEPT_KEY_PATH: TIBStringField;
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EmployeesDEPT_PATH: TIBStringField;
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IBLocalDBSupport1: TIBLocalDBSupport;
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IBLookupComboEditBox1: TIBLookupComboEditBox;
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IBLookupComboEditBox2: TIBLookupComboEditBox;
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IBQuery1DEPT_NO: TIBStringField;
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IBQuery1EMP_NO: TSmallintField;
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IBQuery1FIRST_NAME: TIBStringField;
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IBQuery1FULL_NAME: TIBStringField;
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IBQuery1HIRE_DATE: TDateTimeField;
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IBQuery1JOB_CODE: TIBStringField;
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IBQuery1JOB_COUNTRY: TIBStringField;
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IBQuery1JOB_GRADE: TSmallintField;
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IBQuery1LAST_NAME: TIBStringField;
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IBQuery1PHONE_EXT: TIBStringField;
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IBQuery1SALARY: TIBBCDField;
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SelectDept: TAction;
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Button4: TButton;
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Button5: TButton;
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CancelChanges: TAction;
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SalaryRange: TComboBox;
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CountrySource: TDataSource;
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BeforeDate: TDateEdit;
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AfterDate: TDateEdit;
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DeptsSource: TDataSource;
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Depts: TIBQuery;
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JobCodeSource: TDataSource;
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DBEdit1: TDBEdit;
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DBEdit2: TDBEdit;
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DBEdit3: TDBEdit;
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DBEdit4: TDBEdit;
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DBEdit5: TDBEdit;
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DBText1: TDBText;
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Employees: TIBDataSet;
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EmployeesDEPT_NO: TIBStringField;
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EmployeesEMP_NO: TSmallintField;
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EmployeesFIRST_NAME: TIBStringField;
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EmployeesFULL_NAME: TIBStringField;
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EmployeesHIRE_DATE: TDateTimeField;
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EmployeesJOB_CODE: TIBStringField;
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EmployeesJOB_COUNTRY: TIBStringField;
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EmployeesJOB_GRADE: TSmallintField;
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EmployeesLAST_NAME: TIBStringField;
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EmployeesPHONE_EXT: TIBStringField;
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EmployeesSALARY: TIBBCDField;
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IBDateEdit1: TDBDateEdit;
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IBDynamicGrid1: TIBDynamicGrid;
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Countries: TIBQuery;
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JobCodes: TIBQuery;
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JobGradeDBComboBox: TDBComboBox;
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Label10: TLabel;
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Label11: TLabel;
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Label12: TLabel;
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Label13: TLabel;
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Label3: TLabel;
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Label4: TLabel;
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Label5: TLabel;
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Label6: TLabel;
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Label7: TLabel;
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Label8: TLabel;
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Label9: TLabel;
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Panel1: TPanel;
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Panel2: TPanel;
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EmployeeEditorPanel: TPanel;
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SpeedButton1: TSpeedButton;
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JobGradeChangeTimer: TTimer;
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JobCodeChangeTimer: TTimer;
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TotalsQueryTOTALSALARIES: TIBBCDField;
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TotalsSource: TDataSource;
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TotalsQuery: TIBQuery;
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Label1: TLabel;
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Label2: TLabel;
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SaveChanges: TAction;
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DeleteEmployee: TAction;
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EditEmployee: TAction;
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AddEmployee: TAction;
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ActionList1: TActionList;
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Button1: TButton;
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Button2: TButton;
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Button3: TButton;
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EmployeeSource: TDataSource;
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IBDatabase1: TIBDatabase;
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IBTransaction1: TIBTransaction;
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procedure DBImage1DBImageRead(Sender: TObject; S: TStream;
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var GraphExt: string);
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procedure EmployeesValidatePost(Sender: TObject; var CancelPost: boolean);
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procedure IBDatabase1AfterConnect(Sender: TObject);
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procedure IBLocalDBSupport1GetDBVersionNo(Sender: TObject;
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var VersionNo: integer);
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procedure JobCodeChangeTimerTimer(Sender: TObject);
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procedure JobGradeChangeTimerTimer(Sender: TObject);
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procedure JobGradeDBComboBoxCloseUp(Sender: TObject);
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procedure NewDatabaseExecute(Sender: TObject);
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procedure QuitExecute(Sender: TObject);
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procedure RestoreDatabaseExecute(Sender: TObject);
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procedure SaveDatabaseExecute(Sender: TObject);
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procedure SelectDeptExecute(Sender: TObject);
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procedure AddEmployeeExecute(Sender: TObject);
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procedure BeforeDateChange(Sender: TObject);
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procedure CancelChangesExecute(Sender: TObject);
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procedure CountriesBeforeOpen(DataSet: TDataSet);
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procedure DeleteEmployeeExecute(Sender: TObject);
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procedure EditEmployeeExecute(Sender: TObject);
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procedure EditEmployeeUpdate(Sender: TObject);
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procedure EmployeesAfterInsert(DataSet: TDataSet);
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procedure EmployeesAfterOpen(DataSet: TDataSet);
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procedure EmployeesAfterScroll(DataSet: TDataSet);
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procedure EmployeesBeforeClose(DataSet: TDataSet);
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procedure EmployeesBeforeOpen(DataSet: TDataSet);
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procedure EmployeesJOB_CODEChange(Sender: TField);
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procedure EmployeesJOB_GRADEChange(Sender: TField);
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procedure FormClose(Sender: TObject; var CloseAction: TCloseAction);
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procedure FormShow(Sender: TObject);
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procedure EmployeesAfterDelete(DataSet: TDataSet);
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procedure EmployeesAfterTransactionEnd(Sender: TObject);
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procedure EmployeesPostError(DataSet: TDataSet; E: EDatabaseError;
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var DataAction: TDataAction);
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procedure EmployeesSALARYGetText(Sender: TField; var aText: string;
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DisplayText: Boolean);
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procedure JobCodesBeforeOpen(DataSet: TDataSet);
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procedure SaveChangesExecute(Sender: TObject);
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procedure SaveChangesUpdate(Sender: TObject);
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private
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FCurrentDBVersion: integer;
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{ private declarations }
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FDirty: boolean;
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FNoAutoReopen: boolean;
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procedure Reopen(Data: PtrInt);
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function GetDBVersionNo: integer;
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public
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{ public declarations }
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property CurrentDBVersion: integer read FCurrentDBVersion;
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end;
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var
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Form1: TForm1;
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implementation
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{$R *.lfm}
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uses IB, Unit2;
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const
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sNoName = '<no name>';
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function ExtractDBException(msg: string): string;
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var Lines: TStringList;
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begin
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Lines := TStringList.Create;
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try
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Lines.Text := msg;
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if pos('exception',Lines[0]) = 1 then
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Result := Lines[2]
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else
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Result := msg
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finally
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Lines.Free
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end;
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end;
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{ TForm1 }
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procedure TForm1.EmployeesSALARYGetText(Sender: TField; var aText: string;
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DisplayText: Boolean);
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begin
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if DisplayText then
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begin
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if Sender.IsNUll then
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aText := ''
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else
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aText := FormatFloat('$#,##0.00',Sender.AsFloat)
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end
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else
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aText := Sender.AsString
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end;
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procedure TForm1.JobCodesBeforeOpen(DataSet: TDataSet);
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begin
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JobCodes.ParamByName('JOB_GRADE').AsInteger := EmployeesJOB_GRADE.AsInteger;
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JobCodes.ParamByName('JOB_COUNTRY').AsString := EmployeesJOB_COUNTRY.AsString
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end;
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procedure TForm1.SaveChangesExecute(Sender: TObject);
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begin
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Employees.Transaction.Commit
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end;
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procedure TForm1.SaveChangesUpdate(Sender: TObject);
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begin
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(Sender as TAction).Enabled := FDirty
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end;
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procedure TForm1.Reopen(Data: PtrInt);
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begin
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with IBTransaction1 do
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if not InTransaction then StartTransaction;
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Countries.Active := true;
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Employees.Active := true;
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JobCodes.Active := true;
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Depts.Active := true;
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end;
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function TForm1.GetDBVersionNo: integer;
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begin
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FCurrentDBVersion := 0;
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Result := 0;
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FNoAutoReopen := true;
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try
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with IBTransaction1 do
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if not InTransaction then StartTransaction;
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try
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with CheckVersionTablePresent do
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begin
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ExecQuery;
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try
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if EOF then Exit;
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finally
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Close;
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end;
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end;
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with GetDBVersionNoQuery do
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begin
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ExecQuery;
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try
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Result := FieldByName('VersionNo').AsInteger;
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FCurrentDBVersion := Result;
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finally
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Close;
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end;
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end;
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finally
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IBTransaction1.Commit;
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end;
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finally
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FNoAutoReopen := false
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end;
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end;
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procedure TForm1.AddEmployeeExecute(Sender: TObject);
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begin
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Employees.Append
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end;
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procedure TForm1.SelectDeptExecute(Sender: TObject);
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var Dept_No: string;
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begin
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if SelectDeptDlg.ShowModal(EmployeesDEPT_KEY_PATH.AsString,Dept_No) = mrOK then
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begin
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Employees.Edit;
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EmployeesDEPT_NO.AsString := Dept_No;
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try
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Employees.Post;
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except
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Employees.Cancel;
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raise;
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end;
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IBDynamicGrid1.ShowEditorPanel;
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end;
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end;
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procedure TForm1.DBImage1DBImageRead(Sender: TObject; S: TStream;
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var GraphExt: string);
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begin
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GraphExt := 'png';
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end;
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procedure TForm1.EmployeesValidatePost(Sender: TObject; var CancelPost: boolean
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);
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begin
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{Cancel if no name entered}
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CancelPost := (EmployeesLAST_NAME.AsString = sNoName) and (EmployeesFIRST_NAME.AsString = sNoName);
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end;
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procedure TForm1.IBDatabase1AfterConnect(Sender: TObject);
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begin
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with IBLocalDBSupport1 do
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if CurrentDBVersionNo = RequiredVersionNo then
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ReOpen(0);
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end;
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procedure TForm1.IBLocalDBSupport1GetDBVersionNo(Sender: TObject;
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var VersionNo: integer);
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begin
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VersionNo := GetDBVersionNo;
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end;
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procedure TForm1.JobCodeChangeTimerTimer(Sender: TObject);
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begin
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Countries.Active := false;
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Countries.Active := true;
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JobCodeChangeTimer.Interval := 0;
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end;
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procedure TForm1.JobGradeChangeTimerTimer(Sender: TObject);
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begin
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Countries.Active := false;
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JobCodes.Active := false;
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Countries.Active := true;
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JobCodes.Active := true;
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JobGradeChangeTimer.Interval := 0;
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end;
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procedure TForm1.JobGradeDBComboBoxCloseUp(Sender: TObject);
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begin
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JobGradeDBComboBox.EditingDone; //See http://bugs.freepascal.org/view.php?id=27186
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end;
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procedure TForm1.NewDatabaseExecute(Sender: TObject);
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begin
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FNoAutoReopen := true;
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try
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{Ensure Transaction End}
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if IBTransaction1.InTransaction then
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IBTransaction1.Rollback;
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finally
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FNoAutoReopen := false;
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end;
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IBLocalDBSupport1.NewDatabase;
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end;
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procedure TForm1.QuitExecute(Sender: TObject);
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begin
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Close;
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end;
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procedure TForm1.RestoreDatabaseExecute(Sender: TObject);
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begin
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FNoAutoReopen := true;
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try
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{Ensure all changes saved}
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if IBTransaction1.InTransaction then
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IBTransaction1.Commit;
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finally
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FNoAutoReopen := false;
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end;
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IBLocalDBSupport1.RestoreDatabase;
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end;
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procedure TForm1.SaveDatabaseExecute(Sender: TObject);
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begin
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FNoAutoReopen := true;
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try
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{Ensure all changes saved}
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if IBTransaction1.InTransaction then
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IBTransaction1.Commit;
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finally
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FNoAutoReopen := false;
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end;
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IBLocalDBSupport1.SaveDatabase;
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{Start new Transaction and open dataset}
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ReOpen(0);
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end;
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procedure TForm1.BeforeDateChange(Sender: TObject);
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begin
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Employees.Active := false;
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Employees.Active := true
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end;
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procedure TForm1.CancelChangesExecute(Sender: TObject);
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begin
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Employees.Transaction.Rollback
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end;
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procedure TForm1.CountriesBeforeOpen(DataSet: TDataSet);
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begin
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Countries.ParamByName('JOB_GRADE').AsInteger := EmployeesJOB_GRADE.AsInteger;
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Countries.ParamByName('JOB_CODE').AsString := EmployeesJOB_CODE.AsString
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end;
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procedure TForm1.DeleteEmployeeExecute(Sender: TObject);
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begin
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if MessageDlg(
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Format('Remove %s from Employee List?',[Employees.FieldByName('Full_Name').AsString]),
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mtConfirmation,[mbYes,mbNo],0) = mrYes then
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Employees.Delete
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end;
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procedure TForm1.EditEmployeeExecute(Sender: TObject);
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begin
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IBDynamicGrid1.ShowEditorPanel;
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end;
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procedure TForm1.EditEmployeeUpdate(Sender: TObject);
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begin
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(Sender as TAction).Enabled := Employees.Active and (Employees.RecordCount > 0)
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end;
|
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procedure TForm1.EmployeesAfterInsert(DataSet: TDataSet);
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begin
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EmployeesJOB_COUNTRY.AsString := 'USA';
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EmployeesJOB_CODE.AsString := 'SRep';
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EmployeesJOB_GRADE.AsInteger := 4;
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EmployeesSALARY.AsCurrency := 20000;
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EmployeesFIRST_NAME.AsString := sNoName;
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EmployeesLAST_NAME.AsString := sNoName;
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EmployeesHIRE_DATE.AsDateTime := now;
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EmployeesDEPT_NO.AsString := '000';
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FDirty := true;
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end;
|
468 |
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procedure TForm1.EmployeesAfterOpen(DataSet: TDataSet);
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begin
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TotalsQuery.Active := true;
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IBDynamicGrid1.SetFocus;
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end;
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procedure TForm1.EmployeesAfterScroll(DataSet: TDataSet);
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begin
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JobGradeChangeTimer.Interval := 200;
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end;
|
479 |
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procedure TForm1.EmployeesBeforeClose(DataSet: TDataSet);
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begin
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TotalsQuery.Active := false
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end;
|
484 |
|
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procedure TForm1.EmployeesBeforeOpen(DataSet: TDataSet);
|
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begin
|
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if BeforeDate.Date > 0 then
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(DataSet as TIBParserDataSet).Parser.Add2WhereClause('HIRE_DATE < :BeforeDate');
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if AfterDate.Date > 0 then
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(DataSet as TIBParserDataSet).Parser.Add2WhereClause('HIRE_DATE > :AfterDate');
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case SalaryRange.ItemIndex of
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1:
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(DataSet as TIBParserDataSet).Parser.Add2WhereClause('Salary < 40000');
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2:
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(DataSet as TIBParserDataSet).Parser.Add2WhereClause('Salary >= 40000 and Salary < 100000');
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3:
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(DataSet as TIBParserDataSet).Parser.Add2WhereClause('Salary >= 100000');
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end;
|
500 |
|
501 |
|
502 |
|
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{Parameter value must be set after all SQL changes have been made}
|
504 |
if BeforeDate.Date > 0 then
|
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(DataSet as TIBParserDataSet).ParamByName('BeforeDate').AsDateTime := BeforeDate.Date;
|
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if AfterDate.Date > 0 then
|
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(DataSet as TIBParserDataSet).ParamByName('AfterDate').AsDateTime := AfterDate.Date;
|
508 |
|
509 |
end;
|
510 |
|
511 |
procedure TForm1.EmployeesJOB_CODEChange(Sender: TField);
|
512 |
begin
|
513 |
JobCodeChangeTimer.Interval := 200;
|
514 |
end;
|
515 |
|
516 |
procedure TForm1.EmployeesJOB_GRADEChange(Sender: TField);
|
517 |
begin
|
518 |
JobGradeChangeTimer.Interval := 200;
|
519 |
end;
|
520 |
|
521 |
procedure TForm1.FormClose(Sender: TObject; var CloseAction: TCloseAction);
|
522 |
begin
|
523 |
FNoAutoReopen := true;
|
524 |
if IBTransaction1.InTransaction then
|
525 |
IBTransaction1.Commit;
|
526 |
end;
|
527 |
|
528 |
procedure TForm1.FormShow(Sender: TObject);
|
529 |
begin
|
530 |
try
|
531 |
IBDatabase1.Connected := true;
|
532 |
except On E:Exception do
|
533 |
begin
|
534 |
MessageDlg(E.Message,mtError,[mbOK],0);
|
535 |
Close;
|
536 |
Exit
|
537 |
end;
|
538 |
end;
|
539 |
|
540 |
{If upgrade failed or downgrade not pending then exit}
|
541 |
with IBLocalDBSupport1 do
|
542 |
if (CurrentDBVersionNo < RequiredVersionNo) or
|
543 |
((CurrentDBVersionNo > RequiredVersionNo) and not DowngradePending) then
|
544 |
Close;
|
545 |
end;
|
546 |
|
547 |
procedure TForm1.EmployeesAfterDelete(DataSet: TDataSet);
|
548 |
begin
|
549 |
FDirty := true
|
550 |
end;
|
551 |
|
552 |
procedure TForm1.EmployeesAfterTransactionEnd(Sender: TObject);
|
553 |
begin
|
554 |
FDirty := false;
|
555 |
if not FNoAutoReopen then
|
556 |
Application.QueueAsyncCall(@Reopen,0)
|
557 |
end;
|
558 |
|
559 |
procedure TForm1.EmployeesPostError(DataSet: TDataSet; E: EDatabaseError;
|
560 |
var DataAction: TDataAction);
|
561 |
begin
|
562 |
if E is EIBError then
|
563 |
begin
|
564 |
MessageDlg(ExtractDBException(EIBError(E).message),mtError,[mbOK],0);
|
565 |
DataSet.Cancel;
|
566 |
DataAction := daAbort
|
567 |
end;
|
568 |
end;
|
569 |
|
570 |
end.
|
571 |
|