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;
    EmployeesTEst: TStringField;
    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 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.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:	107
Committed:	Thu Jan 18 14:37:40 2018 UTC (6 years, 3 months ago) by tony
Content type:	text/x-pascal
File size:	11123 byte(s)
Log Message:	Fixes merged
#	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	tony	66	EmployeesTEst: TStringField;
22	tony	33	IBLookupComboEditBox1: TIBLookupComboEditBox;
23			IBLookupComboEditBox2: TIBLookupComboEditBox;
24			IBQuery1DEPT_NO: TIBStringField;
25			IBQuery1EMP_NO: TSmallintField;
26			IBQuery1FIRST_NAME: TIBStringField;
27			IBQuery1FULL_NAME: TIBStringField;
28			IBQuery1HIRE_DATE: TDateTimeField;
29			IBQuery1JOB_CODE: TIBStringField;
30			IBQuery1JOB_COUNTRY: TIBStringField;
31			IBQuery1JOB_GRADE: TSmallintField;
32			IBQuery1LAST_NAME: TIBStringField;
33			IBQuery1PHONE_EXT: TIBStringField;
34			IBQuery1SALARY: TIBBCDField;
35			SelectDept: TAction;
36			Button4: TButton;
37			Button5: TButton;
38			CancelChanges: TAction;
39			SalaryRange: TComboBox;
40			CountrySource: TDataSource;
41			BeforeDate: TDateEdit;
42			AfterDate: TDateEdit;
43			DeptsSource: TDataSource;
44			Depts: TIBQuery;
45			JobCodeSource: TDataSource;
46			DBEdit1: TDBEdit;
47			DBEdit2: TDBEdit;
48			DBEdit3: TDBEdit;
49			DBEdit4: TDBEdit;
50			DBEdit5: TDBEdit;
51			DBText1: TDBText;
52			Employees: TIBDataSet;
53			EmployeesDEPT_NO: TIBStringField;
54			EmployeesEMP_NO: TSmallintField;
55			EmployeesFIRST_NAME: TIBStringField;
56			EmployeesFULL_NAME: TIBStringField;
57			EmployeesHIRE_DATE: TDateTimeField;
58			EmployeesJOB_CODE: TIBStringField;
59			EmployeesJOB_COUNTRY: TIBStringField;
60			EmployeesJOB_GRADE: TSmallintField;
61			EmployeesLAST_NAME: TIBStringField;
62			EmployeesPHONE_EXT: TIBStringField;
63			EmployeesSALARY: TIBBCDField;
64			IBDateEdit1: TDBDateEdit;
65			IBDynamicGrid1: TIBDynamicGrid;
66			Countries: TIBQuery;
67			JobCodes: TIBQuery;
68			JobGradeDBComboBox: TDBComboBox;
69			Label10: TLabel;
70			Label11: TLabel;
71			Label12: TLabel;
72			Label13: TLabel;
73			Label3: TLabel;
74			Label4: TLabel;
75			Label5: TLabel;
76			Label6: TLabel;
77			Label7: TLabel;
78			Label8: TLabel;
79			Label9: TLabel;
80			Panel1: TPanel;
81			Panel2: TPanel;
82			EmployeeEditorPanel: TPanel;
83			SpeedButton1: TSpeedButton;
84			JobGradeChangeTimer: TTimer;
85			JobCodeChangeTimer: TTimer;
86			TotalsQueryTOTALSALARIES: TIBBCDField;
87			TotalsSource: TDataSource;
88			TotalsQuery: TIBQuery;
89			Label1: TLabel;
90			Label2: TLabel;
91			SaveChanges: TAction;
92			DeleteEmployee: TAction;
93			EditEmployee: TAction;
94			AddEmployee: TAction;
95			ActionList1: TActionList;
96			Button1: TButton;
97			Button2: TButton;
98			Button3: TButton;
99			EmployeeSource: TDataSource;
100			IBDatabase1: TIBDatabase;
101			IBTransaction1: TIBTransaction;
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.EmployeesValidatePost(Sender: TObject; var CancelPost: boolean
233			);
234			begin
235			{Cancel if no name entered}
236			CancelPost := (EmployeesLAST_NAME.AsString = sNoName) and (EmployeesFIRST_NAME.AsString = sNoName);
237			end;
238
239			procedure TForm1.JobCodeChangeTimerTimer(Sender: TObject);
240			begin
241			Countries.Active := false;
242			Countries.Active := true;
243			JobCodeChangeTimer.Interval := 0;
244			end;
245
246			procedure TForm1.JobGradeChangeTimerTimer(Sender: TObject);
247			begin
248			Countries.Active := false;
249			JobCodes.Active := false;
250			Countries.Active := true;
251			JobCodes.Active := true;
252			JobGradeChangeTimer.Interval := 0;
253			end;
254
255			procedure TForm1.JobGradeDBComboBoxCloseUp(Sender: TObject);
256			begin
257			JobGradeDBComboBox.EditingDone; //See http://bugs.freepascal.org/view.php?id=27186
258			end;
259
260			procedure TForm1.BeforeDateChange(Sender: TObject);
261			begin
262			Employees.Active := false;
263			Employees.Active := true
264			end;
265
266			procedure TForm1.CancelChangesExecute(Sender: TObject);
267			begin
268			Employees.Transaction.Rollback
269			end;
270
271			procedure TForm1.CountriesBeforeOpen(DataSet: TDataSet);
272			begin
273			Countries.ParamByName('JOB_GRADE').AsInteger := EmployeesJOB_GRADE.AsInteger;
274			Countries.ParamByName('JOB_CODE').AsString := EmployeesJOB_CODE.AsString
275			end;
276
277			procedure TForm1.DeleteEmployeeExecute(Sender: TObject);
278			begin
279			if MessageDlg(
280			Format('Remove %s from Employee List?',[Employees.FieldByName('Full_Name').AsString]),
281			mtConfirmation,[mbYes,mbNo],0) = mrYes then
282			Employees.Delete
283			end;
284
285			procedure TForm1.EditEmployeeExecute(Sender: TObject);
286			begin
287			IBDynamicGrid1.ShowEditorPanel;
288			end;
289
290			procedure TForm1.EditEmployeeUpdate(Sender: TObject);
291			begin
292			(Sender as TAction).Enabled := Employees.Active and (Employees.RecordCount > 0)
293			end;
294
295			procedure TForm1.EmployeesAfterInsert(DataSet: TDataSet);
296			begin
297			EmployeesJOB_COUNTRY.AsString := 'USA';
298			EmployeesJOB_CODE.AsString := 'SRep';
299			EmployeesJOB_GRADE.AsInteger := 4;
300			EmployeesSALARY.AsCurrency := 20000;
301			EmployeesFIRST_NAME.AsString := sNoName;
302			EmployeesLAST_NAME.AsString := sNoName;
303			EmployeesHIRE_DATE.AsDateTime := now;
304			EmployeesDEPT_NO.AsString := '000';
305			FDirty := true;
306			end;
307
308			procedure TForm1.EmployeesAfterOpen(DataSet: TDataSet);
309			begin
310			TotalsQuery.Active := true;
311			IBDynamicGrid1.SetFocus;
312			end;
313
314			procedure TForm1.EmployeesAfterScroll(DataSet: TDataSet);
315			begin
316			JobGradeChangeTimer.Interval := 200;
317			end;
318
319			procedure TForm1.EmployeesBeforeClose(DataSet: TDataSet);
320			begin
321			TotalsQuery.Active := false
322			end;
323
324			procedure TForm1.EmployeesBeforeOpen(DataSet: TDataSet);
325			begin
326			if BeforeDate.Date > 0 then
327			(DataSet as TIBParserDataSet).Parser.Add2WhereClause('HIRE_DATE < :BeforeDate');
328			if AfterDate.Date > 0 then
329			(DataSet as TIBParserDataSet).Parser.Add2WhereClause('HIRE_DATE > :AfterDate');
330
331			case SalaryRange.ItemIndex of
332			1:
333			(DataSet as TIBParserDataSet).Parser.Add2WhereClause('Salary < 40000');
334			2:
335			(DataSet as TIBParserDataSet).Parser.Add2WhereClause('Salary >= 40000 and Salary < 100000');
336			3:
337			(DataSet as TIBParserDataSet).Parser.Add2WhereClause('Salary >= 100000');
338			end;
339
340
341
342			{Parameter value must be set after all SQL changes have been made}
343			if BeforeDate.Date > 0 then
344			(DataSet as TIBParserDataSet).ParamByName('BeforeDate').AsDateTime := BeforeDate.Date;
345			if AfterDate.Date > 0 then
346			(DataSet as TIBParserDataSet).ParamByName('AfterDate').AsDateTime := AfterDate.Date;
347
348			end;
349
350			procedure TForm1.EmployeesJOB_CODEChange(Sender: TField);
351			begin
352			JobCodeChangeTimer.Interval := 200;
353			end;
354
355			procedure TForm1.EmployeesJOB_GRADEChange(Sender: TField);
356			begin
357			JobGradeChangeTimer.Interval := 200;
358			end;
359
360			procedure TForm1.FormClose(Sender: TObject; var CloseAction: TCloseAction);
361			begin
362			FClosing := true;
363			if IBTransaction1.InTransaction then
364			IBTransaction1.Commit;
365			end;
366
367			procedure TForm1.FormShow(Sender: TObject);
368			begin
369			repeat
370			try
371			IBDatabase1.Connected := true;
372			except
373			on E:EIBClientError do
374			begin
375			Close;
376			Exit
377			end;
378			On E:Exception do
379			MessageDlg(E.Message,mtError,[mbOK],0);
380			end;
381			until IBDatabase1.Connected;
382			Reopen(0);
383			end;
384
385			procedure TForm1.EmployeesAfterDelete(DataSet: TDataSet);
386			begin
387			FDirty := true
388			end;
389
390			procedure TForm1.EmployeesAfterTransactionEnd(Sender: TObject);
391			begin
392			FDirty := false;
393			if not FClosing then
394			Application.QueueAsyncCall(@Reopen,0)
395			end;
396
397			procedure TForm1.EmployeesPostError(DataSet: TDataSet; E: EDatabaseError;
398			var DataAction: TDataAction);
399			begin
400			if E is EIBError then
401			begin
402			MessageDlg(ExtractDBException(EIBError(E).message),mtError,[mbOK],0);
403			DataSet.Cancel;
404			DataAction := daAbort
405			end;
406			end;
407
408			end.
409