examples/lookupcombobox/Unit1.pas

(*
 *  IBX For Lazarus (Firebird Express)
 *
 *  The contents of this file are subject to the Initial Developer's
 *  Public License Version 1.0 (the "License"); you may not use this
 *  file except in compliance with the License. You may obtain a copy
 *  of the License here:
 *
 *    http://www.firebirdsql.org/index.php?op=doc&id=idpl
 *
 *  Software distributed under the License is distributed on an "AS
 *  IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 *  implied. See the License for the specific language governing rights
 *  and limitations under the License.
 *
 *  The Initial Developer of the Original Code is Tony Whyman.
 *
 *  The Original Code is (C) 2015 Tony Whyman, MWA Software
 *  (http://www.mwasoftware.co.uk).
 *
 *  All Rights Reserved.
 *
 *  Contributor(s): ______________________________________.
 *
*) 
            
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;
    IBDateEdit1: TDBDateEdit;
    IBLookupComboEditBox2: TIBLookupComboEditBox;
    IBLookupComboEditBox3: TIBLookupComboEditBox;
    JobCodeSource: TDataSource;
    DBComboBox1: TDBComboBox;
    DBEdit4: TDBEdit;
    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 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.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:	143
Committed:	Fri Feb 23 12:11:21 2018 UTC (6 years, 1 month ago) by tony
Content type:	text/x-pascal
File size:	8974 byte(s)
Log Message:	Fixes Merged
#	Content
1	(*
2	* IBX For Lazarus (Firebird Express)
3	*
4	* The contents of this file are subject to the Initial Developer's
5	* Public License Version 1.0 (the "License"); you may not use this
6	* file except in compliance with the License. You may obtain a copy
7	* of the License here:
8	*
9	* http://www.firebirdsql.org/index.php?op=doc&id=idpl
10	*
11	* Software distributed under the License is distributed on an "AS
12	* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
13	* implied. See the License for the specific language governing rights
14	* and limitations under the License.
15	*
16	* The Initial Developer of the Original Code is Tony Whyman.
17	*
18	* The Original Code is (C) 2015 Tony Whyman, MWA Software
19	* (http://www.mwasoftware.co.uk).
20	*
21	* All Rights Reserved.
22	*
23	* Contributor(s): ______________________________________.
24	*
25	*)
26
27	unit Unit1;
28
29	{$mode objfpc}{$H+}
30
31	interface
32
33	uses
34	Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs, StdCtrls,
35	ExtCtrls, DbCtrls, EditBtn, Buttons, db, IBDatabase, IBCustomDataSet,
36	IBLookupComboEditBox, IBQuery, DBExtCtrls;
37
38	type
39
40	{ TForm1 }
41
42	TForm1 = class(TForm)
43	ApplicationProperties1: TApplicationProperties;
44	DBEdit5: TDBEdit;
45	DeleteBtn: TButton;
46	CountriesSource: TDataSource;
47	EmployeesDEPT_KEY_PATH: TIBStringField;
48	EmployeesDEPT_PATH: TIBStringField;
49	IBDateEdit1: TDBDateEdit;
50	IBLookupComboEditBox2: TIBLookupComboEditBox;
51	IBLookupComboEditBox3: TIBLookupComboEditBox;
52	JobCodeSource: TDataSource;
53	DBComboBox1: TDBComboBox;
54	DBEdit4: TDBEdit;
55	Countries: TIBQuery;
56	JobCodes: TIBQuery;
57	Label10: TLabel;
58	Label11: TLabel;
59	Label6: TLabel;
60	Label7: TLabel;
61	Label8: TLabel;
62	Label9: TLabel;
63	SaveBtn: TButton;
64	CancelBtn: TButton;
65	EmployeeSource: TDataSource;
66	DBEdit1: TDBEdit;
67	DBEdit2: TDBEdit;
68	DBEdit3: TDBEdit;
69	EmployeesDEPT_NO: TIBStringField;
70	EmployeesEMP_NO: TSmallintField;
71	EmployeesFIRST_NAME: TIBStringField;
72	EmployeesFULL_NAME: TIBStringField;
73	EmployeesHIRE_DATE: TDateTimeField;
74	EmployeesJOB_CODE: TIBStringField;
75	EmployeesJOB_COUNTRY: TIBStringField;
76	EmployeesJOB_GRADE: TSmallintField;
77	EmployeesLAST_NAME: TIBStringField;
78	EmployeesPHONE_EXT: TIBStringField;
79	EmployeesSALARY: TIBBCDField;
80	IBDatabase1: TIBDatabase;
81	Employees: TIBDataSet;
82	IBLookupComboEditBox1: TIBLookupComboEditBox;
83	IBTransaction1: TIBTransaction;
84	Label1: TLabel;
85	Label2: TLabel;
86	Label3: TLabel;
87	Label4: TLabel;
88	Label5: TLabel;
89	Panel1: TPanel;
90	SpeedButton1: TSpeedButton;
91	procedure ApplicationProperties1Idle(Sender: TObject; var Done: Boolean);
92	procedure CancelBtnClick(Sender: TObject);
93	procedure CountriesBeforeOpen(DataSet: TDataSet);
94	procedure EmployeeSourceDataChange(Sender: TObject; Field: TField);
95	procedure DBComboBox1CloseUp(Sender: TObject);
96	procedure DeleteBtnClick(Sender: TObject);
97	procedure EmployeesAfterDelete(DataSet: TDataSet);
98	procedure EmployeesAfterInsert(DataSet: TDataSet);
99	procedure EmployeesAfterPost(DataSet: TDataSet);
100	procedure EmployeesAfterTransactionEnd(Sender: TObject);
101	procedure EmployeesFULL_NAMEChange(Sender: TField);
102	procedure EmployeesJOB_CODEChange(Sender: TField);
103	procedure EmployeesJOB_GRADEChange(Sender: TField);
104	procedure EmployeesSALARYGetText(Sender: TField; var aText: string;
105	DisplayText: Boolean);
106	procedure FormClose(Sender: TObject; var CloseAction: TCloseAction);
107	procedure FormShow(Sender: TObject);
108	procedure IBLookupComboEditBox1CanAutoInsert(Sender: TObject;
109	aText: string; var Accept: boolean);
110	procedure JobCodesBeforeOpen(DataSet: TDataSet);
111	procedure SaveBtnClick(Sender: TObject);
112	procedure SpeedButton1Click(Sender: TObject);
113	private
114	{ private declarations }
115	FDirty: boolean;
116	FClosing: boolean;
117	FLastJobGrade: integer;
118	FLastJobCode: string;
119	procedure OpenDataSets(Data: PtrInt);
120	public
121	{ public declarations }
122	end;
123
124	var
125	Form1: TForm1;
126
127	implementation
128
129	uses Unit2, IB;
130
131	{$R *.lfm}
132
133	{ TForm1 }
134
135	procedure TForm1.EmployeesSALARYGetText(Sender: TField; var aText: string;
136	DisplayText: Boolean);
137	begin
138	if not Sender.IsNull and DisplayText then
139	aText := FormatFloat('$#,##0.00',Sender.AsFloat)
140	else
141	aText := Sender.AsString
142	end;
143
144	procedure TForm1.FormClose(Sender: TObject; var CloseAction: TCloseAction);
145	begin
146	FClosing := true;
147	if IBTransaction1.InTransaction then
148	IBTransaction1.Commit
149	end;
150
151	procedure TForm1.FormShow(Sender: TObject);
152	begin
153	FClosing := false;
154	repeat
155	try
156	IBDatabase1.Connected := true;
157	except
158	on E:EIBClientError do
159	begin
160	Close;
161	Exit
162	end;
163	On E:Exception do
164	MessageDlg(E.Message,mtError,[mbOK],0);
165	end;
166	until IBDatabase1.Connected;
167	OpenDataSets(0)
168	end;
169
170	procedure TForm1.IBLookupComboEditBox1CanAutoInsert(Sender: TObject;
171	aText: string; var Accept: boolean);
172	begin
173	Accept := MessageDlg(Format('Insert a new Employee record for ''%s''?',
174	[aText]),mtConfirmation,[mbYes,mbNo],0) = mrYes
175	end;
176
177	procedure TForm1.JobCodesBeforeOpen(DataSet: TDataSet);
178	begin
179	JobCodes.ParamByName('JOB_GRADE').AsInteger := EmployeesJOB_GRADE.AsInteger;
180	FLastJobGrade := EmployeesJOB_GRADE.AsInteger;
181	end;
182
183	procedure TForm1.SaveBtnClick(Sender: TObject);
184	begin
185	IBTransaction1.Commit
186	end;
187
188	procedure TForm1.SpeedButton1Click(Sender: TObject);
189	var DeptNo: string;
190	begin
191	if SelectDeptDlg.ShowModal(EmployeesDEPT_KEY_PATH.AsString,DeptNo) = mrOK then
192	begin
193	Employees.Edit;
194	EmployeesDEPT_NO.AsString := DeptNo;
195	try
196	Employees.Post;
197	except
198	Employees.Cancel;
199	raise;
200	end;
201	end;
202	end;
203
204	procedure TForm1.OpenDataSets(Data: PtrInt);
205	begin
206	FDirty := false;
207	IBTransaction1.StartTransaction;
208	JobCodes.Active := true;
209	Countries.Active := true;
210	Employees.Active := true;
211	end;
212
213	procedure TForm1.ApplicationProperties1Idle(Sender: TObject; var Done: Boolean);
214	begin
215	SaveBtn.Enabled := FDirty;
216	CancelBtn.Enabled := FDirty;
217	DeleteBtn.Enabled := Employees.Active and (Employees.RecordCount > 0)
218	end;
219
220	procedure TForm1.CancelBtnClick(Sender: TObject);
221	begin
222	if Employees.State in [dsInsert,dsEdit] then
223	Employees.Cancel;
224	IBTransaction1.Rollback
225	end;
226
227	procedure TForm1.CountriesBeforeOpen(DataSet: TDataSet);
228	begin
229	Countries.ParamByName('JOB_GRADE').AsInteger := EmployeesJOB_GRADE.AsInteger;
230	Countries.ParamByName('JOB_CODE').AsString := EmployeesJOB_CODE.AsString;
231	FLastJobGrade := EmployeesJOB_GRADE.AsInteger;
232	FLastJobCode := EmployeesJOB_CODE.AsString;
233	end;
234
235	procedure TForm1.EmployeeSourceDataChange(Sender: TObject; Field: TField);
236	begin
237	if FLastJobGrade <> EmployeesJOB_GRADE.AsInteger then
238	begin
239	JobCodes.Active := false;
240	JobCodes.Active := true;
241	Countries.Active := false;
242	Countries.Active := true;
243	end
244	else
245	if FLastJobCode <> EmployeesJOB_CODE.AsString then
246	begin
247	Countries.Active := false;
248	Countries.Active := true;
249	end;
250	end;
251
252	procedure TForm1.DBComboBox1CloseUp(Sender: TObject);
253	begin
254	(Sender as TCustomDBComboBox).EditingDone
255	end;
256
257	procedure TForm1.DeleteBtnClick(Sender: TObject);
258	begin
259	if MessageDlg(Format('Do you really want to delete ''%s''?',
260	[EmployeesFULL_NAME.AsString]),
261	mtConfirmation,[mbYes,mbNo],0) = mrYes then
262	Employees.Delete
263	end;
264
265	procedure TForm1.EmployeesAfterDelete(DataSet: TDataSet);
266	begin
267	FDirty := true
268	end;
269
270	procedure TForm1.EmployeesAfterInsert(DataSet: TDataSet);
271	begin
272	FDirty := true;
273	EmployeesJOB_COUNTRY.AsString := 'USA';
274	EmployeesJOB_CODE.AsString := 'SRep';
275	EmployeesJOB_GRADE.AsInteger := 4;
276	EmployeesSALARY.AsCurrency := 20000;
277	EmployeesFIRST_NAME.AsString := 'John';
278	EmployeesLAST_NAME.AsString := 'Doe';
279	EmployeesHIRE_DATE.AsDateTime := now;
280	EmployeesDEPT_NO.AsString := '000';
281	end;
282
283	procedure TForm1.EmployeesAfterPost(DataSet: TDataSet);
284	begin
285	Employees.Refresh;
286	end;
287
288	procedure TForm1.EmployeesAfterTransactionEnd(Sender: TObject);
289	begin
290	if not FClosing then
291	Application.QueueAsyncCall(@OpenDataSets,0)
292	end;
293
294	procedure TForm1.EmployeesFULL_NAMEChange(Sender: TField);
295	var I: integer;
296	aText: string;
297	begin
298	aText := Sender.AsString;
299	I := Pos(',',aText);
300	Employees.Edit;
301	if I > 0 then
302	begin
303	EmployeesLAST_NAME.AsString := system.copy(aText,1,I-1);
304	EmployeesFIRST_NAME.AsString := Trim(system.copy(aText,I+1,Length(aText) - I));
305	end
306	else
307	begin
308	EmployeesLAST_NAME.AsString := aText;
309	EmployeesFIRST_NAME.AsString := '!!unknown!!';
310	end;
311	end;
312
313	procedure TForm1.EmployeesJOB_CODEChange(Sender: TField);
314	begin
315	Countries.Active := false;
316	Countries.Active := true;
317	end;
318
319	procedure TForm1.EmployeesJOB_GRADEChange(Sender: TField);
320	begin
321	JobCodes.Active := false;
322	JobCodes.Active := true;
323	Countries.Active := false;
324	Countries.Active := true;
325	end;
326
327	end.
328