examples/lookupcombobox/Unit1.pas

unit Unit1;

{$mode objfpc}{$H+}

interface

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

type

  { TForm1 }

  TForm1 = class(TForm)
    ApplicationProperties1: TApplicationProperties;
    DBEdit5: TDBEdit;
    DeleteBtn: TButton;
    CountriesSource: TDataSource;
    EmployeesDEPT_KEY_PATH: TIBStringField;
    EmployeesDEPT_PATH: TIBStringField;
    IBLookupComboEditBox2: TIBLookupComboEditBox;
    IBLookupComboEditBox3: TIBLookupComboEditBox;
    JobCodeSource: TDataSource;
    DBComboBox1: TDBComboBox;
    DBEdit4: TDBEdit;
    IBDateEdit1: TDBDateEdit;
    Countries: TIBQuery;
    JobCodes: TIBQuery;
    Label10: TLabel;
    Label11: TLabel;
    Label6: TLabel;
    Label7: TLabel;
    Label8: TLabel;
    Label9: TLabel;
    SaveBtn: TButton;
    CancelBtn: TButton;
    EmployeeSource: TDataSource;
    DBEdit1: TDBEdit;
    DBEdit2: TDBEdit;
    DBEdit3: TDBEdit;
    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;
    IBDatabase1: TIBDatabase;
    Employees: TIBDataSet;
    IBLookupComboEditBox1: TIBLookupComboEditBox;
    IBTransaction1: TIBTransaction;
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    Label4: TLabel;
    Label5: TLabel;
    Panel1: TPanel;
    SpeedButton1: TSpeedButton;
    procedure ApplicationProperties1Idle(Sender: TObject; var Done: Boolean);
    procedure CancelBtnClick(Sender: TObject);
    procedure CountriesBeforeOpen(DataSet: TDataSet);
    procedure EmployeeSourceDataChange(Sender: TObject; Field: TField);
    procedure DBComboBox1CloseUp(Sender: TObject);
    procedure DeleteBtnClick(Sender: TObject);
    procedure EmployeesAfterDelete(DataSet: TDataSet);
    procedure EmployeesAfterInsert(DataSet: TDataSet);
    procedure EmployeesAfterPost(DataSet: TDataSet);
    procedure EmployeesAfterTransactionEnd(Sender: TObject);
    procedure EmployeesBeforeScroll(DataSet: TDataSet);
    procedure EmployeesFULL_NAMEChange(Sender: TField);
    procedure EmployeesJOB_CODEChange(Sender: TField);
    procedure EmployeesJOB_GRADEChange(Sender: TField);
    procedure EmployeesSALARYGetText(Sender: TField; var aText: string;
      DisplayText: Boolean);
    procedure FormClose(Sender: TObject; var CloseAction: TCloseAction);
    procedure FormShow(Sender: TObject);
    procedure IBLookupComboEditBox1CanAutoInsert(Sender: TObject;
      aText: string; var Accept: boolean);
    procedure JobCodesBeforeOpen(DataSet: TDataSet);
    procedure SaveBtnClick(Sender: TObject);
    procedure SpeedButton1Click(Sender: TObject);
  private
    { private declarations }
    FDirty: boolean;
    FClosing: boolean;
    FLastJobGrade: integer;
    FLastJobCode: string;
    procedure OpenDataSets(Data: PtrInt);
  public
    { public declarations }
  end;

var
  Form1: TForm1;

implementation

uses Unit2, IB;

{$R *.lfm}

{ TForm1 }

procedure TForm1.EmployeesSALARYGetText(Sender: TField; var aText: string;
  DisplayText: Boolean);
begin
  if not Sender.IsNull and DisplayText then
    aText := FormatFloat('$#,##0.00',Sender.AsFloat)
  else
    aText := Sender.AsString
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
  FClosing := false;
  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;
  OpenDataSets(0)
end;

procedure TForm1.IBLookupComboEditBox1CanAutoInsert(Sender: TObject;
  aText: string; var Accept: boolean);
begin
  Accept := MessageDlg(Format('Insert a new Employee record for ''%s''?',
              [aText]),mtConfirmation,[mbYes,mbNo],0) = mrYes
end;

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

procedure TForm1.SaveBtnClick(Sender: TObject);
begin
  IBTransaction1.Commit
end;

procedure TForm1.SpeedButton1Click(Sender: TObject);
var DeptNo: string;
begin
  if SelectDeptDlg.ShowModal(EmployeesDEPT_KEY_PATH.AsString,DeptNo) = mrOK then
  begin
    Employees.Edit;
    EmployeesDEPT_NO.AsString := DeptNo;
    try
      Employees.Post;
    except
      Employees.Cancel;
      raise;
    end;
  end;
end;

procedure TForm1.OpenDataSets(Data: PtrInt);
begin
  FDirty := false;
  IBTransaction1.StartTransaction;
  JobCodes.Active := true;
  Countries.Active := true;
  Employees.Active := true;
end;

procedure TForm1.ApplicationProperties1Idle(Sender: TObject; var Done: Boolean);
begin
  SaveBtn.Enabled := FDirty;
  CancelBtn.Enabled := FDirty;
  DeleteBtn.Enabled := Employees.Active and (Employees.RecordCount > 0)
end;

procedure TForm1.CancelBtnClick(Sender: TObject);
begin
  if Employees.State in [dsInsert,dsEdit] then
    Employees.Cancel;
  IBTransaction1.Rollback
end;

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

procedure TForm1.EmployeeSourceDataChange(Sender: TObject; Field: TField);
begin
  if FLastJobGrade <>  EmployeesJOB_GRADE.AsInteger then
  begin
    JobCodes.Active := false;
    JobCodes.Active := true;
    Countries.Active := false;
    Countries.Active := true;
  end
  else
  if FLastJobCode <> EmployeesJOB_CODE.AsString then
  begin
    Countries.Active := false;
    Countries.Active := true;
  end;
end;

procedure TForm1.DBComboBox1CloseUp(Sender: TObject);
begin
  (Sender as TCustomDBComboBox).EditingDone
end;

procedure TForm1.DeleteBtnClick(Sender: TObject);
begin
  if MessageDlg(Format('Do you really want to delete ''%s''?',
                           [EmployeesFULL_NAME.AsString]),
                           mtConfirmation,[mbYes,mbNo],0) = mrYes then
    Employees.Delete
end;

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

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

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

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

procedure TForm1.EmployeesBeforeScroll(DataSet: TDataSet);
begin
  with DataSet do
    if State in [dsInsert,dsEdit] then
    try
      Post
    except on E: Exception do
      begin
        Cancel;
        MessageDlg(E.Message,mtError,[mbOK],0)
      end;
    end;
end;

procedure TForm1.EmployeesFULL_NAMEChange(Sender: TField);
var I: integer;
    aText: string;
begin
  aText := Sender.AsString;
  I := Pos(',',aText);
  Employees.Edit;
  if I > 0 then
  begin
    EmployeesLAST_NAME.AsString := system.copy(aText,1,I-1);
    EmployeesFIRST_NAME.AsString := Trim(system.copy(aText,I+1,Length(aText) - I));
  end
  else
  begin
    EmployeesLAST_NAME.AsString := aText;
    EmployeesFIRST_NAME.AsString := '!!unknown!!';
  end;
end;

procedure TForm1.EmployeesJOB_CODEChange(Sender: TField);
begin
  Countries.Active := false;
  Countries.Active := true;
end;

procedure TForm1.EmployeesJOB_GRADEChange(Sender: TField);
begin
  JobCodes.Active := false;
  JobCodes.Active := true;
  Countries.Active := false;
  Countries.Active := true;
end;

end.

Revision:	21
Committed:	Thu Feb 26 10:33:34 2015 UTC (9 years, 9 months ago) by tony
Content type:	text/x-pascal
File size:	8442 byte(s)
Log Message:	Committing updates for Release R1-2-0
#	Content
1	unit Unit1;
2
3	{$mode objfpc}{$H+}
4
5	interface
6
7	uses
8	Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs, StdCtrls,
9	ExtCtrls, DbCtrls, EditBtn, Buttons, db, IBDatabase, IBCustomDataSet,
10	IBLookupComboEditBox, IBQuery, DBExtCtrls;
11
12	type
13
14	{ TForm1 }
15
16	TForm1 = class(TForm)
17	ApplicationProperties1: TApplicationProperties;
18	DBEdit5: TDBEdit;
19	DeleteBtn: TButton;
20	CountriesSource: TDataSource;
21	EmployeesDEPT_KEY_PATH: TIBStringField;
22	EmployeesDEPT_PATH: TIBStringField;
23	IBLookupComboEditBox2: TIBLookupComboEditBox;
24	IBLookupComboEditBox3: TIBLookupComboEditBox;
25	JobCodeSource: TDataSource;
26	DBComboBox1: TDBComboBox;
27	DBEdit4: TDBEdit;
28	IBDateEdit1: TDBDateEdit;
29	Countries: TIBQuery;
30	JobCodes: TIBQuery;
31	Label10: TLabel;
32	Label11: TLabel;
33	Label6: TLabel;
34	Label7: TLabel;
35	Label8: TLabel;
36	Label9: TLabel;
37	SaveBtn: TButton;
38	CancelBtn: TButton;
39	EmployeeSource: TDataSource;
40	DBEdit1: TDBEdit;
41	DBEdit2: TDBEdit;
42	DBEdit3: TDBEdit;
43	EmployeesDEPT_NO: TIBStringField;
44	EmployeesEMP_NO: TSmallintField;
45	EmployeesFIRST_NAME: TIBStringField;
46	EmployeesFULL_NAME: TIBStringField;
47	EmployeesHIRE_DATE: TDateTimeField;
48	EmployeesJOB_CODE: TIBStringField;
49	EmployeesJOB_COUNTRY: TIBStringField;
50	EmployeesJOB_GRADE: TSmallintField;
51	EmployeesLAST_NAME: TIBStringField;
52	EmployeesPHONE_EXT: TIBStringField;
53	EmployeesSALARY: TIBBCDField;
54	IBDatabase1: TIBDatabase;
55	Employees: TIBDataSet;
56	IBLookupComboEditBox1: TIBLookupComboEditBox;
57	IBTransaction1: TIBTransaction;
58	Label1: TLabel;
59	Label2: TLabel;
60	Label3: TLabel;
61	Label4: TLabel;
62	Label5: TLabel;
63	Panel1: TPanel;
64	SpeedButton1: TSpeedButton;
65	procedure ApplicationProperties1Idle(Sender: TObject; var Done: Boolean);
66	procedure CancelBtnClick(Sender: TObject);
67	procedure CountriesBeforeOpen(DataSet: TDataSet);
68	procedure EmployeeSourceDataChange(Sender: TObject; Field: TField);
69	procedure DBComboBox1CloseUp(Sender: TObject);
70	procedure DeleteBtnClick(Sender: TObject);
71	procedure EmployeesAfterDelete(DataSet: TDataSet);
72	procedure EmployeesAfterInsert(DataSet: TDataSet);
73	procedure EmployeesAfterPost(DataSet: TDataSet);
74	procedure EmployeesAfterTransactionEnd(Sender: TObject);
75	procedure EmployeesBeforeScroll(DataSet: TDataSet);
76	procedure EmployeesFULL_NAMEChange(Sender: TField);
77	procedure EmployeesJOB_CODEChange(Sender: TField);
78	procedure EmployeesJOB_GRADEChange(Sender: TField);
79	procedure EmployeesSALARYGetText(Sender: TField; var aText: string;
80	DisplayText: Boolean);
81	procedure FormClose(Sender: TObject; var CloseAction: TCloseAction);
82	procedure FormShow(Sender: TObject);
83	procedure IBLookupComboEditBox1CanAutoInsert(Sender: TObject;
84	aText: string; var Accept: boolean);
85	procedure JobCodesBeforeOpen(DataSet: TDataSet);
86	procedure SaveBtnClick(Sender: TObject);
87	procedure SpeedButton1Click(Sender: TObject);
88	private
89	{ private declarations }
90	FDirty: boolean;
91	FClosing: boolean;
92	FLastJobGrade: integer;
93	FLastJobCode: string;
94	procedure OpenDataSets(Data: PtrInt);
95	public
96	{ public declarations }
97	end;
98
99	var
100	Form1: TForm1;
101
102	implementation
103
104	uses Unit2, IB;
105
106	{$R *.lfm}
107
108	{ TForm1 }
109
110	procedure TForm1.EmployeesSALARYGetText(Sender: TField; var aText: string;
111	DisplayText: Boolean);
112	begin
113	if not Sender.IsNull and DisplayText then
114	aText := FormatFloat('$#,##0.00',Sender.AsFloat)
115	else
116	aText := Sender.AsString
117	end;
118
119	procedure TForm1.FormClose(Sender: TObject; var CloseAction: TCloseAction);
120	begin
121	FClosing := true;
122	if IBTransaction1.InTransaction then
123	IBTransaction1.Commit
124	end;
125
126	procedure TForm1.FormShow(Sender: TObject);
127	begin
128	FClosing := false;
129	repeat
130	try
131	IBDatabase1.Connected := true;
132	except
133	on E:EIBClientError do
134	begin
135	Close;
136	Exit
137	end;
138	On E:Exception do
139	MessageDlg(E.Message,mtError,[mbOK],0);
140	end;
141	until IBDatabase1.Connected;
142	OpenDataSets(0)
143	end;
144
145	procedure TForm1.IBLookupComboEditBox1CanAutoInsert(Sender: TObject;
146	aText: string; var Accept: boolean);
147	begin
148	Accept := MessageDlg(Format('Insert a new Employee record for ''%s''?',
149	[aText]),mtConfirmation,[mbYes,mbNo],0) = mrYes
150	end;
151
152	procedure TForm1.JobCodesBeforeOpen(DataSet: TDataSet);
153	begin
154	JobCodes.ParamByName('JOB_GRADE').AsInteger := EmployeesJOB_GRADE.AsInteger;
155	FLastJobGrade := EmployeesJOB_GRADE.AsInteger;
156	end;
157
158	procedure TForm1.SaveBtnClick(Sender: TObject);
159	begin
160	IBTransaction1.Commit
161	end;
162
163	procedure TForm1.SpeedButton1Click(Sender: TObject);
164	var DeptNo: string;
165	begin
166	if SelectDeptDlg.ShowModal(EmployeesDEPT_KEY_PATH.AsString,DeptNo) = mrOK then
167	begin
168	Employees.Edit;
169	EmployeesDEPT_NO.AsString := DeptNo;
170	try
171	Employees.Post;
172	except
173	Employees.Cancel;
174	raise;
175	end;
176	end;
177	end;
178
179	procedure TForm1.OpenDataSets(Data: PtrInt);
180	begin
181	FDirty := false;
182	IBTransaction1.StartTransaction;
183	JobCodes.Active := true;
184	Countries.Active := true;
185	Employees.Active := true;
186	end;
187
188	procedure TForm1.ApplicationProperties1Idle(Sender: TObject; var Done: Boolean);
189	begin
190	SaveBtn.Enabled := FDirty;
191	CancelBtn.Enabled := FDirty;
192	DeleteBtn.Enabled := Employees.Active and (Employees.RecordCount > 0)
193	end;
194
195	procedure TForm1.CancelBtnClick(Sender: TObject);
196	begin
197	if Employees.State in [dsInsert,dsEdit] then
198	Employees.Cancel;
199	IBTransaction1.Rollback
200	end;
201
202	procedure TForm1.CountriesBeforeOpen(DataSet: TDataSet);
203	begin
204	Countries.ParamByName('JOB_GRADE').AsInteger := EmployeesJOB_GRADE.AsInteger;
205	Countries.ParamByName('JOB_CODE').AsString := EmployeesJOB_CODE.AsString;
206	FLastJobGrade := EmployeesJOB_GRADE.AsInteger;
207	FLastJobCode := EmployeesJOB_CODE.AsString;
208	end;
209
210	procedure TForm1.EmployeeSourceDataChange(Sender: TObject; Field: TField);
211	begin
212	if FLastJobGrade <> EmployeesJOB_GRADE.AsInteger then
213	begin
214	JobCodes.Active := false;
215	JobCodes.Active := true;
216	Countries.Active := false;
217	Countries.Active := true;
218	end
219	else
220	if FLastJobCode <> EmployeesJOB_CODE.AsString then
221	begin
222	Countries.Active := false;
223	Countries.Active := true;
224	end;
225	end;
226
227	procedure TForm1.DBComboBox1CloseUp(Sender: TObject);
228	begin
229	(Sender as TCustomDBComboBox).EditingDone
230	end;
231
232	procedure TForm1.DeleteBtnClick(Sender: TObject);
233	begin
234	if MessageDlg(Format('Do you really want to delete ''%s''?',
235	[EmployeesFULL_NAME.AsString]),
236	mtConfirmation,[mbYes,mbNo],0) = mrYes then
237	Employees.Delete
238	end;
239
240	procedure TForm1.EmployeesAfterDelete(DataSet: TDataSet);
241	begin
242	FDirty := true
243	end;
244
245	procedure TForm1.EmployeesAfterInsert(DataSet: TDataSet);
246	begin
247	FDirty := true;
248	EmployeesJOB_COUNTRY.AsString := 'USA';
249	EmployeesJOB_CODE.AsString := 'SRep';
250	EmployeesJOB_GRADE.AsInteger := 4;
251	EmployeesSALARY.AsCurrency := 20000;
252	EmployeesFIRST_NAME.AsString := 'John';
253	EmployeesLAST_NAME.AsString := 'Doe';
254	EmployeesHIRE_DATE.AsDateTime := now;
255	EmployeesDEPT_NO.AsString := '000';
256	end;
257
258	procedure TForm1.EmployeesAfterPost(DataSet: TDataSet);
259	begin
260	Employees.Refresh;
261	end;
262
263	procedure TForm1.EmployeesAfterTransactionEnd(Sender: TObject);
264	begin
265	if not FClosing then
266	Application.QueueAsyncCall(@OpenDataSets,0)
267	end;
268
269	procedure TForm1.EmployeesBeforeScroll(DataSet: TDataSet);
270	begin
271	with DataSet do
272	if State in [dsInsert,dsEdit] then
273	try
274	Post
275	except on E: Exception do
276	begin
277	Cancel;
278	MessageDlg(E.Message,mtError,[mbOK],0)
279	end;
280	end;
281	end;
282
283	procedure TForm1.EmployeesFULL_NAMEChange(Sender: TField);
284	var I: integer;
285	aText: string;
286	begin
287	aText := Sender.AsString;
288	I := Pos(',',aText);
289	Employees.Edit;
290	if I > 0 then
291	begin
292	EmployeesLAST_NAME.AsString := system.copy(aText,1,I-1);
293	EmployeesFIRST_NAME.AsString := Trim(system.copy(aText,I+1,Length(aText) - I));
294	end
295	else
296	begin
297	EmployeesLAST_NAME.AsString := aText;
298	EmployeesFIRST_NAME.AsString := '!!unknown!!';
299	end;
300	end;
301
302	procedure TForm1.EmployeesJOB_CODEChange(Sender: TField);
303	begin
304	Countries.Active := false;
305	Countries.Active := true;
306	end;
307
308	procedure TForm1.EmployeesJOB_GRADEChange(Sender: TField);
309	begin
310	JobCodes.Active := false;
311	JobCodes.Active := true;
312	Countries.Active := false;
313	Countries.Active := true;
314	end;
315
316	end.
317