examples/employee/unit1.pas

unit Unit1; 

{$mode objfpc}{$H+}

interface

uses
  Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs, DBGrids,
  StdCtrls, ActnList, EditBtn, DbCtrls, ExtCtrls, Buttons, IBDatabase, IBQuery,
  IBCustomDataSet, IBUpdateSQL, IBDynamicGrid, IBLookupComboEditBox,
  db, DBExtCtrls;

type

  { TForm1 }

  TForm1 = class(TForm)
    DBEdit6: TDBEdit;
    EmployeesDEPT_KEY_PATH: TIBStringField;
    EmployeesDEPT_PATH: TIBStringField;
    IBLookupComboEditBox1: TIBLookupComboEditBox;
    IBLookupComboEditBox2: TIBLookupComboEditBox;
    IBQuery1DEPT_NO: TIBStringField;
    IBQuery1EMP_NO: TSmallintField;
    IBQuery1FIRST_NAME: TIBStringField;
    IBQuery1FULL_NAME: TIBStringField;
    IBQuery1HIRE_DATE: TDateTimeField;
    IBQuery1JOB_CODE: TIBStringField;
    IBQuery1JOB_COUNTRY: TIBStringField;
    IBQuery1JOB_GRADE: TSmallintField;
    IBQuery1LAST_NAME: TIBStringField;
    IBQuery1PHONE_EXT: TIBStringField;
    IBQuery1SALARY: TIBBCDField;
    SelectDept: TAction;
    Button4: TButton;
    Button5: TButton;
    CancelChanges: TAction;
    SalaryRange: TComboBox;
    CountrySource: TDataSource;
    BeforeDate: TDateEdit;
    AfterDate: TDateEdit;
    DeptsSource: TDataSource;
    Depts: TIBQuery;
    JobCodeSource: TDataSource;
    DBEdit1: TDBEdit;
    DBEdit2: TDBEdit;
    DBEdit3: TDBEdit;
    DBEdit4: TDBEdit;
    DBEdit5: TDBEdit;
    DBText1: TDBText;
    Employees: TIBDataSet;
    EmployeesDEPT_NO: TIBStringField;
    EmployeesEMP_NO: TSmallintField;
    EmployeesFIRST_NAME: TIBStringField;
    EmployeesFULL_NAME: TIBStringField;
    EmployeesHIRE_DATE: TDateTimeField;
    EmployeesJOB_CODE: TIBStringField;
    EmployeesJOB_COUNTRY: TIBStringField;
    EmployeesJOB_GRADE: TSmallintField;
    EmployeesLAST_NAME: TIBStringField;
    EmployeesPHONE_EXT: TIBStringField;
    EmployeesSALARY: TIBBCDField;
    IBDateEdit1: TDBDateEdit;
    IBDynamicGrid1: TIBDynamicGrid;
    Countries: TIBQuery;
    JobCodes: TIBQuery;
    JobGradeDBComboBox: TDBComboBox;
    Label10: TLabel;
    Label11: TLabel;
    Label12: TLabel;
    Label13: TLabel;
    Label3: TLabel;
    Label4: TLabel;
    Label5: TLabel;
    Label6: TLabel;
    Label7: TLabel;
    Label8: TLabel;
    Label9: TLabel;
    Panel1: TPanel;
    Panel2: TPanel;
    EmployeeEditorPanel: TPanel;
    SpeedButton1: TSpeedButton;
    JobGradeChangeTimer: TTimer;
    JobCodeChangeTimer: TTimer;
    TotalsQueryTOTALSALARIES: TIBBCDField;
    TotalsSource: TDataSource;
    TotalsQuery: TIBQuery;
    Label1: TLabel;
    Label2: TLabel;
    SaveChanges: TAction;
    DeleteEmployee: TAction;
    EditEmployee: TAction;
    AddEmployee: TAction;
    ActionList1: TActionList;
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    EmployeeSource: TDataSource;
    IBDatabase1: TIBDatabase;
    IBTransaction1: TIBTransaction;
    procedure EmployeesAfterPost(DataSet: TDataSet);
    procedure EmployeesValidatePost(Sender: TObject; var CancelPost: boolean);
    procedure JobCodeChangeTimerTimer(Sender: TObject);
    procedure JobGradeChangeTimerTimer(Sender: TObject);
    procedure JobGradeDBComboBoxCloseUp(Sender: TObject);
    procedure SelectDeptExecute(Sender: TObject);
    procedure AddEmployeeExecute(Sender: TObject);
    procedure BeforeDateChange(Sender: TObject);
    procedure CancelChangesExecute(Sender: TObject);
    procedure CountriesBeforeOpen(DataSet: TDataSet);
    procedure DeleteEmployeeExecute(Sender: TObject);
    procedure EditEmployeeExecute(Sender: TObject);
    procedure EditEmployeeUpdate(Sender: TObject);
    procedure EmployeesAfterInsert(DataSet: TDataSet);
    procedure EmployeesAfterOpen(DataSet: TDataSet);
    procedure EmployeesAfterScroll(DataSet: TDataSet);
    procedure EmployeesBeforeClose(DataSet: TDataSet);
    procedure EmployeesBeforeOpen(DataSet: TDataSet);
    procedure EmployeesJOB_CODEChange(Sender: TField);
    procedure EmployeesJOB_GRADEChange(Sender: TField);
    procedure FormClose(Sender: TObject; var CloseAction: TCloseAction);
    procedure FormShow(Sender: TObject);
    procedure EmployeesAfterDelete(DataSet: TDataSet);
    procedure EmployeesAfterTransactionEnd(Sender: TObject);
    procedure EmployeesPostError(DataSet: TDataSet; E: EDatabaseError;
      var DataAction: TDataAction);
    procedure EmployeesSALARYGetText(Sender: TField; var aText: string;
      DisplayText: Boolean);
    procedure JobCodesBeforeOpen(DataSet: TDataSet);
    procedure SaveChangesExecute(Sender: TObject);
    procedure SaveChangesUpdate(Sender: TObject);
  private
    { private declarations }
    FDirty: boolean;
    FClosing: boolean;
    procedure Reopen(Data: PtrInt);
  public
    { public declarations }
  end; 

var
  Form1: TForm1; 

implementation

{$R *.lfm}

uses IB, Unit2;

const
  sNoName = '<no name>';

function ExtractDBException(msg: string): string;
var Lines: TStringList;
begin
     Lines := TStringList.Create;
     try
       Lines.Text := msg;
       if pos('exception',Lines[0]) = 1 then
         Result := Lines[2]
       else
         Result := msg
     finally
       Lines.Free
     end;
end;

{ TForm1 }

procedure TForm1.EmployeesSALARYGetText(Sender: TField; var aText: string;
  DisplayText: Boolean);
begin
  if DisplayText then
  begin
    if Sender.IsNUll then
      aText := ''
    else
      aText := FormatFloat('$#,##0.00',Sender.AsFloat)
  end
  else
    aText := Sender.AsString
end;

procedure TForm1.JobCodesBeforeOpen(DataSet: TDataSet);
begin
  JobCodes.ParamByName('JOB_GRADE').AsInteger := EmployeesJOB_GRADE.AsInteger;
  JobCodes.ParamByName('JOB_COUNTRY').AsString := EmployeesJOB_COUNTRY.AsString
end;

procedure TForm1.SaveChangesExecute(Sender: TObject);
begin
  Employees.Transaction.Commit
end;

procedure TForm1.SaveChangesUpdate(Sender: TObject);
begin
  (Sender as TAction).Enabled := FDirty
end;

procedure TForm1.Reopen(Data: PtrInt);
begin
  with IBTransaction1 do
    if not InTransaction then StartTransaction;
  Countries.Active := true;
  Employees.Active := true;
  JobCodes.Active := true;
  Depts.Active := true;
end;

procedure TForm1.AddEmployeeExecute(Sender: TObject);
begin
  Employees.Append
end;

procedure TForm1.SelectDeptExecute(Sender: TObject);
var Dept_No: string;
begin
  if SelectDeptDlg.ShowModal(EmployeesDEPT_KEY_PATH.AsString,Dept_No) = mrOK then
  begin
    Employees.Edit;
    EmployeesDEPT_NO.AsString := Dept_No;
    try
      Employees.Post;
    except
      Employees.Cancel;
      raise;
    end;
    IBDynamicGrid1.ShowEditorPanel;
  end;
end;

procedure TForm1.EmployeesAfterPost(DataSet: TDataSet);
begin
  Employees.Refresh
end;

procedure TForm1.EmployeesValidatePost(Sender: TObject; var CancelPost: boolean
  );
begin
  {Cancel if no name entered}
  CancelPost := (EmployeesLAST_NAME.AsString = sNoName) and  (EmployeesFIRST_NAME.AsString = sNoName);
end;

procedure TForm1.JobCodeChangeTimerTimer(Sender: TObject);
begin
  Countries.Active := false;
  Countries.Active := true;
  JobCodeChangeTimer.Interval := 0;
end;

procedure TForm1.JobGradeChangeTimerTimer(Sender: TObject);
begin
  Countries.Active := false;
  JobCodes.Active := false;
  Countries.Active := true;
  JobCodes.Active := true;
  JobGradeChangeTimer.Interval := 0;
end;

procedure TForm1.JobGradeDBComboBoxCloseUp(Sender: TObject);
begin
  JobGradeDBComboBox.EditingDone; //See http://bugs.freepascal.org/view.php?id=27186
end;

procedure TForm1.BeforeDateChange(Sender: TObject);
begin
  Employees.Active := false;
  Employees.Active := true
end;

procedure TForm1.CancelChangesExecute(Sender: TObject);
begin
  Employees.Transaction.Rollback
end;

procedure TForm1.CountriesBeforeOpen(DataSet: TDataSet);
begin
  Countries.ParamByName('JOB_GRADE').AsInteger := EmployeesJOB_GRADE.AsInteger;
  Countries.ParamByName('JOB_CODE').AsString := EmployeesJOB_CODE.AsString
end;

procedure TForm1.DeleteEmployeeExecute(Sender: TObject);
begin
  if MessageDlg(
    Format('Remove %s from Employee List?',[Employees.FieldByName('Full_Name').AsString]),
    mtConfirmation,[mbYes,mbNo],0) = mrYes then
    Employees.Delete
end;

procedure TForm1.EditEmployeeExecute(Sender: TObject);
begin
  IBDynamicGrid1.ShowEditorPanel;
end;

procedure TForm1.EditEmployeeUpdate(Sender: TObject);
begin
  (Sender as TAction).Enabled := Employees.Active and (Employees.RecordCount > 0)
end;

procedure TForm1.EmployeesAfterInsert(DataSet: TDataSet);
begin
  EmployeesJOB_COUNTRY.AsString := 'USA';
  EmployeesJOB_CODE.AsString := 'SRep';
  EmployeesJOB_GRADE.AsInteger := 4;
  EmployeesSALARY.AsCurrency := 20000;
  EmployeesFIRST_NAME.AsString := sNoName;
  EmployeesLAST_NAME.AsString := sNoName;
  EmployeesHIRE_DATE.AsDateTime := now;
  EmployeesDEPT_NO.AsString := '000';
  FDirty := true;
end;

procedure TForm1.EmployeesAfterOpen(DataSet: TDataSet);
begin
  TotalsQuery.Active := true;
  IBDynamicGrid1.SetFocus;
end;

procedure TForm1.EmployeesAfterScroll(DataSet: TDataSet);
begin
  JobGradeChangeTimer.Interval := 200;
end;

procedure TForm1.EmployeesBeforeClose(DataSet: TDataSet);
begin
  TotalsQuery.Active := false
end;

procedure TForm1.EmployeesBeforeOpen(DataSet: TDataSet);
begin
  if BeforeDate.Date > 0 then
     (DataSet as TIBParserDataSet).Parser.Add2WhereClause('HIRE_DATE < :BeforeDate');
  if AfterDate.Date > 0 then
     (DataSet as TIBParserDataSet).Parser.Add2WhereClause('HIRE_DATE > :AfterDate');

  case SalaryRange.ItemIndex of
  1:
    (DataSet as TIBParserDataSet).Parser.Add2WhereClause('Salary < 40000');
  2:
    (DataSet as TIBParserDataSet).Parser.Add2WhereClause('Salary >= 40000 and Salary < 100000');
  3:
    (DataSet as TIBParserDataSet).Parser.Add2WhereClause('Salary >= 100000');
  end;


  {Parameter value must be set after all SQL changes have been made}
  if BeforeDate.Date > 0 then
     (DataSet as TIBParserDataSet).ParamByName('BeforeDate').AsDateTime := BeforeDate.Date;
  if AfterDate.Date > 0 then
   (DataSet as TIBParserDataSet).ParamByName('AfterDate').AsDateTime := AfterDate.Date;

end;

procedure TForm1.EmployeesJOB_CODEChange(Sender: TField);
begin
  JobCodeChangeTimer.Interval := 200;
end;

procedure TForm1.EmployeesJOB_GRADEChange(Sender: TField);
begin
  JobGradeChangeTimer.Interval := 200;
end;

procedure TForm1.FormClose(Sender: TObject; var CloseAction: TCloseAction);
begin
  FClosing := true;
  if IBTransaction1.InTransaction then
    IBTransaction1.Commit;
end;

procedure TForm1.FormShow(Sender: TObject);
begin
  repeat
    try
      IBDatabase1.Connected := true;
    except
     on E:EIBClientError do
      begin
        Close;
        Exit
      end;
    On E:Exception do
     MessageDlg(E.Message,mtError,[mbOK],0);
    end;
  until IBDatabase1.Connected;
  Reopen(0);
end;

procedure TForm1.EmployeesAfterDelete(DataSet: TDataSet);
begin
  FDirty := true
end;

procedure TForm1.EmployeesAfterTransactionEnd(Sender: TObject);
begin
  FDirty := false;
  if not FClosing then
    Application.QueueAsyncCall(@Reopen,0)
end;

procedure TForm1.EmployeesPostError(DataSet: TDataSet; E: EDatabaseError;
  var DataAction: TDataAction);
begin
  if E is EIBError then
   begin
       MessageDlg(ExtractDBException(EIBError(E).message),mtError,[mbOK],0);
       DataSet.Cancel;
       DataAction  := daAbort
   end;
end;

end.

Revision:	33
Committed:	Sat Jul 18 12:30:52 2015 UTC (8 years, 9 months ago) by tony
Content type:	text/x-pascal
File size:	11231 byte(s)
Log Message:	Committing updates for Release R1-3-1
#	User	Rev	Content
1	tony	33	unit Unit1;
2
3			{$mode objfpc}{$H+}
4
5			interface
6
7			uses
8			Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs, DBGrids,
9			StdCtrls, ActnList, EditBtn, DbCtrls, ExtCtrls, Buttons, IBDatabase, IBQuery,
10			IBCustomDataSet, IBUpdateSQL, IBDynamicGrid, IBLookupComboEditBox,
11			db, DBExtCtrls;
12
13			type
14
15			{ TForm1 }
16
17			TForm1 = class(TForm)
18			DBEdit6: TDBEdit;
19			EmployeesDEPT_KEY_PATH: TIBStringField;
20			EmployeesDEPT_PATH: TIBStringField;
21			IBLookupComboEditBox1: TIBLookupComboEditBox;
22			IBLookupComboEditBox2: TIBLookupComboEditBox;
23			IBQuery1DEPT_NO: TIBStringField;
24			IBQuery1EMP_NO: TSmallintField;
25			IBQuery1FIRST_NAME: TIBStringField;
26			IBQuery1FULL_NAME: TIBStringField;
27			IBQuery1HIRE_DATE: TDateTimeField;
28			IBQuery1JOB_CODE: TIBStringField;
29			IBQuery1JOB_COUNTRY: TIBStringField;
30			IBQuery1JOB_GRADE: TSmallintField;
31			IBQuery1LAST_NAME: TIBStringField;
32			IBQuery1PHONE_EXT: TIBStringField;
33			IBQuery1SALARY: TIBBCDField;
34			SelectDept: TAction;
35			Button4: TButton;
36			Button5: TButton;
37			CancelChanges: TAction;
38			SalaryRange: TComboBox;
39			CountrySource: TDataSource;
40			BeforeDate: TDateEdit;
41			AfterDate: TDateEdit;
42			DeptsSource: TDataSource;
43			Depts: TIBQuery;
44			JobCodeSource: TDataSource;
45			DBEdit1: TDBEdit;
46			DBEdit2: TDBEdit;
47			DBEdit3: TDBEdit;
48			DBEdit4: TDBEdit;
49			DBEdit5: TDBEdit;
50			DBText1: TDBText;
51			Employees: TIBDataSet;
52			EmployeesDEPT_NO: TIBStringField;
53			EmployeesEMP_NO: TSmallintField;
54			EmployeesFIRST_NAME: TIBStringField;
55			EmployeesFULL_NAME: TIBStringField;
56			EmployeesHIRE_DATE: TDateTimeField;
57			EmployeesJOB_CODE: TIBStringField;
58			EmployeesJOB_COUNTRY: TIBStringField;
59			EmployeesJOB_GRADE: TSmallintField;
60			EmployeesLAST_NAME: TIBStringField;
61			EmployeesPHONE_EXT: TIBStringField;
62			EmployeesSALARY: TIBBCDField;
63			IBDateEdit1: TDBDateEdit;
64			IBDynamicGrid1: TIBDynamicGrid;
65			Countries: TIBQuery;
66			JobCodes: TIBQuery;
67			JobGradeDBComboBox: TDBComboBox;
68			Label10: TLabel;
69			Label11: TLabel;
70			Label12: TLabel;
71			Label13: TLabel;
72			Label3: TLabel;
73			Label4: TLabel;
74			Label5: TLabel;
75			Label6: TLabel;
76			Label7: TLabel;
77			Label8: TLabel;
78			Label9: TLabel;
79			Panel1: TPanel;
80			Panel2: TPanel;
81			EmployeeEditorPanel: TPanel;
82			SpeedButton1: TSpeedButton;
83			JobGradeChangeTimer: TTimer;
84			JobCodeChangeTimer: TTimer;
85			TotalsQueryTOTALSALARIES: TIBBCDField;
86			TotalsSource: TDataSource;
87			TotalsQuery: TIBQuery;
88			Label1: TLabel;
89			Label2: TLabel;
90			SaveChanges: TAction;
91			DeleteEmployee: TAction;
92			EditEmployee: TAction;
93			AddEmployee: TAction;
94			ActionList1: TActionList;
95			Button1: TButton;
96			Button2: TButton;
97			Button3: TButton;
98			EmployeeSource: TDataSource;
99			IBDatabase1: TIBDatabase;
100			IBTransaction1: TIBTransaction;
101			procedure EmployeesAfterPost(DataSet: TDataSet);
102			procedure EmployeesValidatePost(Sender: TObject; var CancelPost: boolean);
103			procedure JobCodeChangeTimerTimer(Sender: TObject);
104			procedure JobGradeChangeTimerTimer(Sender: TObject);
105			procedure JobGradeDBComboBoxCloseUp(Sender: TObject);
106			procedure SelectDeptExecute(Sender: TObject);
107			procedure AddEmployeeExecute(Sender: TObject);
108			procedure BeforeDateChange(Sender: TObject);
109			procedure CancelChangesExecute(Sender: TObject);
110			procedure CountriesBeforeOpen(DataSet: TDataSet);
111			procedure DeleteEmployeeExecute(Sender: TObject);
112			procedure EditEmployeeExecute(Sender: TObject);
113			procedure EditEmployeeUpdate(Sender: TObject);
114			procedure EmployeesAfterInsert(DataSet: TDataSet);
115			procedure EmployeesAfterOpen(DataSet: TDataSet);
116			procedure EmployeesAfterScroll(DataSet: TDataSet);
117			procedure EmployeesBeforeClose(DataSet: TDataSet);
118			procedure EmployeesBeforeOpen(DataSet: TDataSet);
119			procedure EmployeesJOB_CODEChange(Sender: TField);
120			procedure EmployeesJOB_GRADEChange(Sender: TField);
121			procedure FormClose(Sender: TObject; var CloseAction: TCloseAction);
122			procedure FormShow(Sender: TObject);
123			procedure EmployeesAfterDelete(DataSet: TDataSet);
124			procedure EmployeesAfterTransactionEnd(Sender: TObject);
125			procedure EmployeesPostError(DataSet: TDataSet; E: EDatabaseError;
126			var DataAction: TDataAction);
127			procedure EmployeesSALARYGetText(Sender: TField; var aText: string;
128			DisplayText: Boolean);
129			procedure JobCodesBeforeOpen(DataSet: TDataSet);
130			procedure SaveChangesExecute(Sender: TObject);
131			procedure SaveChangesUpdate(Sender: TObject);
132			private
133			{ private declarations }
134			FDirty: boolean;
135			FClosing: boolean;
136			procedure Reopen(Data: PtrInt);
137			public
138			{ public declarations }
139			end;
140
141			var
142			Form1: TForm1;
143
144			implementation
145
146			{$R *.lfm}
147
148			uses IB, Unit2;
149
150			const
151			sNoName = '<no name>';
152
153			function ExtractDBException(msg: string): string;
154			var Lines: TStringList;
155			begin
156			Lines := TStringList.Create;
157			try
158			Lines.Text := msg;
159			if pos('exception',Lines[0]) = 1 then
160			Result := Lines[2]
161			else
162			Result := msg
163			finally
164			Lines.Free
165			end;
166			end;
167
168			{ TForm1 }
169
170			procedure TForm1.EmployeesSALARYGetText(Sender: TField; var aText: string;
171			DisplayText: Boolean);
172			begin
173			if DisplayText then
174			begin
175			if Sender.IsNUll then
176			aText := ''
177			else
178			aText := FormatFloat('$#,##0.00',Sender.AsFloat)
179			end
180			else
181			aText := Sender.AsString
182			end;
183
184			procedure TForm1.JobCodesBeforeOpen(DataSet: TDataSet);
185			begin
186			JobCodes.ParamByName('JOB_GRADE').AsInteger := EmployeesJOB_GRADE.AsInteger;
187			JobCodes.ParamByName('JOB_COUNTRY').AsString := EmployeesJOB_COUNTRY.AsString
188			end;
189
190			procedure TForm1.SaveChangesExecute(Sender: TObject);
191			begin
192			Employees.Transaction.Commit
193			end;
194
195			procedure TForm1.SaveChangesUpdate(Sender: TObject);
196			begin
197			(Sender as TAction).Enabled := FDirty
198			end;
199
200			procedure TForm1.Reopen(Data: PtrInt);
201			begin
202			with IBTransaction1 do
203			if not InTransaction then StartTransaction;
204			Countries.Active := true;
205			Employees.Active := true;
206			JobCodes.Active := true;
207			Depts.Active := true;
208			end;
209
210			procedure TForm1.AddEmployeeExecute(Sender: TObject);
211			begin
212			Employees.Append
213			end;
214
215			procedure TForm1.SelectDeptExecute(Sender: TObject);
216			var Dept_No: string;
217			begin
218			if SelectDeptDlg.ShowModal(EmployeesDEPT_KEY_PATH.AsString,Dept_No) = mrOK then
219			begin
220			Employees.Edit;
221			EmployeesDEPT_NO.AsString := Dept_No;
222			try
223			Employees.Post;
224			except
225			Employees.Cancel;
226			raise;
227			end;
228			IBDynamicGrid1.ShowEditorPanel;
229			end;
230			end;
231
232			procedure TForm1.EmployeesAfterPost(DataSet: TDataSet);
233			begin
234			Employees.Refresh
235			end;
236
237			procedure TForm1.EmployeesValidatePost(Sender: TObject; var CancelPost: boolean
238			);
239			begin
240			{Cancel if no name entered}
241			CancelPost := (EmployeesLAST_NAME.AsString = sNoName) and (EmployeesFIRST_NAME.AsString = sNoName);
242			end;
243
244			procedure TForm1.JobCodeChangeTimerTimer(Sender: TObject);
245			begin
246			Countries.Active := false;
247			Countries.Active := true;
248			JobCodeChangeTimer.Interval := 0;
249			end;
250
251			procedure TForm1.JobGradeChangeTimerTimer(Sender: TObject);
252			begin
253			Countries.Active := false;
254			JobCodes.Active := false;
255			Countries.Active := true;
256			JobCodes.Active := true;
257			JobGradeChangeTimer.Interval := 0;
258			end;
259
260			procedure TForm1.JobGradeDBComboBoxCloseUp(Sender: TObject);
261			begin
262			JobGradeDBComboBox.EditingDone; //See http://bugs.freepascal.org/view.php?id=27186
263			end;
264
265			procedure TForm1.BeforeDateChange(Sender: TObject);
266			begin
267			Employees.Active := false;
268			Employees.Active := true
269			end;
270
271			procedure TForm1.CancelChangesExecute(Sender: TObject);
272			begin
273			Employees.Transaction.Rollback
274			end;
275
276			procedure TForm1.CountriesBeforeOpen(DataSet: TDataSet);
277			begin
278			Countries.ParamByName('JOB_GRADE').AsInteger := EmployeesJOB_GRADE.AsInteger;
279			Countries.ParamByName('JOB_CODE').AsString := EmployeesJOB_CODE.AsString
280			end;
281
282			procedure TForm1.DeleteEmployeeExecute(Sender: TObject);
283			begin
284			if MessageDlg(
285			Format('Remove %s from Employee List?',[Employees.FieldByName('Full_Name').AsString]),
286			mtConfirmation,[mbYes,mbNo],0) = mrYes then
287			Employees.Delete
288			end;
289
290			procedure TForm1.EditEmployeeExecute(Sender: TObject);
291			begin
292			IBDynamicGrid1.ShowEditorPanel;
293			end;
294
295			procedure TForm1.EditEmployeeUpdate(Sender: TObject);
296			begin
297			(Sender as TAction).Enabled := Employees.Active and (Employees.RecordCount > 0)
298			end;
299
300			procedure TForm1.EmployeesAfterInsert(DataSet: TDataSet);
301			begin
302			EmployeesJOB_COUNTRY.AsString := 'USA';
303			EmployeesJOB_CODE.AsString := 'SRep';
304			EmployeesJOB_GRADE.AsInteger := 4;
305			EmployeesSALARY.AsCurrency := 20000;
306			EmployeesFIRST_NAME.AsString := sNoName;
307			EmployeesLAST_NAME.AsString := sNoName;
308			EmployeesHIRE_DATE.AsDateTime := now;
309			EmployeesDEPT_NO.AsString := '000';
310			FDirty := true;
311			end;
312
313			procedure TForm1.EmployeesAfterOpen(DataSet: TDataSet);
314			begin
315			TotalsQuery.Active := true;
316			IBDynamicGrid1.SetFocus;
317			end;
318
319			procedure TForm1.EmployeesAfterScroll(DataSet: TDataSet);
320			begin
321			JobGradeChangeTimer.Interval := 200;
322			end;
323
324			procedure TForm1.EmployeesBeforeClose(DataSet: TDataSet);
325			begin
326			TotalsQuery.Active := false
327			end;
328
329			procedure TForm1.EmployeesBeforeOpen(DataSet: TDataSet);
330			begin
331			if BeforeDate.Date > 0 then
332			(DataSet as TIBParserDataSet).Parser.Add2WhereClause('HIRE_DATE < :BeforeDate');
333			if AfterDate.Date > 0 then
334			(DataSet as TIBParserDataSet).Parser.Add2WhereClause('HIRE_DATE > :AfterDate');
335
336			case SalaryRange.ItemIndex of
337			1:
338			(DataSet as TIBParserDataSet).Parser.Add2WhereClause('Salary < 40000');
339			2:
340			(DataSet as TIBParserDataSet).Parser.Add2WhereClause('Salary >= 40000 and Salary < 100000');
341			3:
342			(DataSet as TIBParserDataSet).Parser.Add2WhereClause('Salary >= 100000');
343			end;
344
345
346
347			{Parameter value must be set after all SQL changes have been made}
348			if BeforeDate.Date > 0 then
349			(DataSet as TIBParserDataSet).ParamByName('BeforeDate').AsDateTime := BeforeDate.Date;
350			if AfterDate.Date > 0 then
351			(DataSet as TIBParserDataSet).ParamByName('AfterDate').AsDateTime := AfterDate.Date;
352
353			end;
354
355			procedure TForm1.EmployeesJOB_CODEChange(Sender: TField);
356			begin
357			JobCodeChangeTimer.Interval := 200;
358			end;
359
360			procedure TForm1.EmployeesJOB_GRADEChange(Sender: TField);
361			begin
362			JobGradeChangeTimer.Interval := 200;
363			end;
364
365			procedure TForm1.FormClose(Sender: TObject; var CloseAction: TCloseAction);
366			begin
367			FClosing := true;
368			if IBTransaction1.InTransaction then
369			IBTransaction1.Commit;
370			end;
371
372			procedure TForm1.FormShow(Sender: TObject);
373			begin
374			repeat
375			try
376			IBDatabase1.Connected := true;
377			except
378			on E:EIBClientError do
379			begin
380			Close;
381			Exit
382			end;
383			On E:Exception do
384			MessageDlg(E.Message,mtError,[mbOK],0);
385			end;
386			until IBDatabase1.Connected;
387			Reopen(0);
388			end;
389
390			procedure TForm1.EmployeesAfterDelete(DataSet: TDataSet);
391			begin
392			FDirty := true
393			end;
394
395			procedure TForm1.EmployeesAfterTransactionEnd(Sender: TObject);
396			begin
397			FDirty := false;
398			if not FClosing then
399			Application.QueueAsyncCall(@Reopen,0)
400			end;
401
402			procedure TForm1.EmployeesPostError(DataSet: TDataSet; E: EDatabaseError;
403			var DataAction: TDataAction);
404			begin
405			if E is EIBError then
406			begin
407			MessageDlg(ExtractDBException(EIBError(E).message),mtError,[mbOK],0);
408			DataSet.Cancel;
409			DataAction := daAbort
410			end;
411			end;
412
413			end.
414