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;
    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:	27
Committed:	Tue Apr 14 13:10:23 2015 UTC (9 years, 7 months ago) by tony
Content type:	text/x-pascal
File size:	8114 byte(s)
Log Message:	Committing updates for Release R1-2-3
#	User	Rev	Content
1	tony	21	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	tony	27	IBDateEdit1: TDBDateEdit;
24	tony	21	IBLookupComboEditBox2: TIBLookupComboEditBox;
25			IBLookupComboEditBox3: TIBLookupComboEditBox;
26			JobCodeSource: TDataSource;
27			DBComboBox1: TDBComboBox;
28			DBEdit4: TDBEdit;
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 EmployeesFULL_NAMEChange(Sender: TField);
76			procedure EmployeesJOB_CODEChange(Sender: TField);
77			procedure EmployeesJOB_GRADEChange(Sender: TField);
78			procedure EmployeesSALARYGetText(Sender: TField; var aText: string;
79			DisplayText: Boolean);
80			procedure FormClose(Sender: TObject; var CloseAction: TCloseAction);
81			procedure FormShow(Sender: TObject);
82			procedure IBLookupComboEditBox1CanAutoInsert(Sender: TObject;
83			aText: string; var Accept: boolean);
84			procedure JobCodesBeforeOpen(DataSet: TDataSet);
85			procedure SaveBtnClick(Sender: TObject);
86			procedure SpeedButton1Click(Sender: TObject);
87			private
88			{ private declarations }
89			FDirty: boolean;
90			FClosing: boolean;
91			FLastJobGrade: integer;
92			FLastJobCode: string;
93			procedure OpenDataSets(Data: PtrInt);
94			public
95			{ public declarations }
96			end;
97
98			var
99			Form1: TForm1;
100
101			implementation
102
103			uses Unit2, IB;
104
105			{$R *.lfm}
106
107			{ TForm1 }
108
109			procedure TForm1.EmployeesSALARYGetText(Sender: TField; var aText: string;
110			DisplayText: Boolean);
111			begin
112			if not Sender.IsNull and DisplayText then
113			aText := FormatFloat('$#,##0.00',Sender.AsFloat)
114			else
115			aText := Sender.AsString
116			end;
117
118			procedure TForm1.FormClose(Sender: TObject; var CloseAction: TCloseAction);
119			begin
120			FClosing := true;
121			if IBTransaction1.InTransaction then
122			IBTransaction1.Commit
123			end;
124
125			procedure TForm1.FormShow(Sender: TObject);
126			begin
127			FClosing := false;
128			repeat
129			try
130			IBDatabase1.Connected := true;
131			except
132			on E:EIBClientError do
133			begin
134			Close;
135			Exit
136			end;
137			On E:Exception do
138			MessageDlg(E.Message,mtError,[mbOK],0);
139			end;
140			until IBDatabase1.Connected;
141			OpenDataSets(0)
142			end;
143
144			procedure TForm1.IBLookupComboEditBox1CanAutoInsert(Sender: TObject;
145			aText: string; var Accept: boolean);
146			begin
147			Accept := MessageDlg(Format('Insert a new Employee record for ''%s''?',
148			[aText]),mtConfirmation,[mbYes,mbNo],0) = mrYes
149			end;
150
151			procedure TForm1.JobCodesBeforeOpen(DataSet: TDataSet);
152			begin
153			JobCodes.ParamByName('JOB_GRADE').AsInteger := EmployeesJOB_GRADE.AsInteger;
154			FLastJobGrade := EmployeesJOB_GRADE.AsInteger;
155			end;
156
157			procedure TForm1.SaveBtnClick(Sender: TObject);
158			begin
159			IBTransaction1.Commit
160			end;
161
162			procedure TForm1.SpeedButton1Click(Sender: TObject);
163			var DeptNo: string;
164			begin
165			if SelectDeptDlg.ShowModal(EmployeesDEPT_KEY_PATH.AsString,DeptNo) = mrOK then
166			begin
167			Employees.Edit;
168			EmployeesDEPT_NO.AsString := DeptNo;
169			try
170			Employees.Post;
171			except
172			Employees.Cancel;
173			raise;
174			end;
175			end;
176			end;
177
178			procedure TForm1.OpenDataSets(Data: PtrInt);
179			begin
180			FDirty := false;
181			IBTransaction1.StartTransaction;
182			JobCodes.Active := true;
183			Countries.Active := true;
184			Employees.Active := true;
185			end;
186
187			procedure TForm1.ApplicationProperties1Idle(Sender: TObject; var Done: Boolean);
188			begin
189			SaveBtn.Enabled := FDirty;
190			CancelBtn.Enabled := FDirty;
191			DeleteBtn.Enabled := Employees.Active and (Employees.RecordCount > 0)
192			end;
193
194			procedure TForm1.CancelBtnClick(Sender: TObject);
195			begin
196			if Employees.State in [dsInsert,dsEdit] then
197			Employees.Cancel;
198			IBTransaction1.Rollback
199			end;
200
201			procedure TForm1.CountriesBeforeOpen(DataSet: TDataSet);
202			begin
203			Countries.ParamByName('JOB_GRADE').AsInteger := EmployeesJOB_GRADE.AsInteger;
204			Countries.ParamByName('JOB_CODE').AsString := EmployeesJOB_CODE.AsString;
205			FLastJobGrade := EmployeesJOB_GRADE.AsInteger;
206			FLastJobCode := EmployeesJOB_CODE.AsString;
207			end;
208
209			procedure TForm1.EmployeeSourceDataChange(Sender: TObject; Field: TField);
210			begin
211			if FLastJobGrade <> EmployeesJOB_GRADE.AsInteger then
212			begin
213			JobCodes.Active := false;
214			JobCodes.Active := true;
215			Countries.Active := false;
216			Countries.Active := true;
217			end
218			else
219			if FLastJobCode <> EmployeesJOB_CODE.AsString then
220			begin
221			Countries.Active := false;
222			Countries.Active := true;
223			end;
224			end;
225
226			procedure TForm1.DBComboBox1CloseUp(Sender: TObject);
227			begin
228			(Sender as TCustomDBComboBox).EditingDone
229			end;
230
231			procedure TForm1.DeleteBtnClick(Sender: TObject);
232			begin
233			if MessageDlg(Format('Do you really want to delete ''%s''?',
234			[EmployeesFULL_NAME.AsString]),
235			mtConfirmation,[mbYes,mbNo],0) = mrYes then
236			Employees.Delete
237			end;
238
239			procedure TForm1.EmployeesAfterDelete(DataSet: TDataSet);
240			begin
241			FDirty := true
242			end;
243
244			procedure TForm1.EmployeesAfterInsert(DataSet: TDataSet);
245			begin
246			FDirty := true;
247			EmployeesJOB_COUNTRY.AsString := 'USA';
248			EmployeesJOB_CODE.AsString := 'SRep';
249			EmployeesJOB_GRADE.AsInteger := 4;
250			EmployeesSALARY.AsCurrency := 20000;
251			EmployeesFIRST_NAME.AsString := 'John';
252			EmployeesLAST_NAME.AsString := 'Doe';
253			EmployeesHIRE_DATE.AsDateTime := now;
254			EmployeesDEPT_NO.AsString := '000';
255			end;
256
257			procedure TForm1.EmployeesAfterPost(DataSet: TDataSet);
258			begin
259			Employees.Refresh;
260			end;
261
262			procedure TForm1.EmployeesAfterTransactionEnd(Sender: TObject);
263			begin
264			if not FClosing then
265			Application.QueueAsyncCall(@OpenDataSets,0)
266			end;
267
268			procedure TForm1.EmployeesFULL_NAMEChange(Sender: TField);
269			var I: integer;
270			aText: string;
271			begin
272			aText := Sender.AsString;
273			I := Pos(',',aText);
274			Employees.Edit;
275			if I > 0 then
276			begin
277			EmployeesLAST_NAME.AsString := system.copy(aText,1,I-1);
278			EmployeesFIRST_NAME.AsString := Trim(system.copy(aText,I+1,Length(aText) - I));
279			end
280			else
281			begin
282			EmployeesLAST_NAME.AsString := aText;
283			EmployeesFIRST_NAME.AsString := '!!unknown!!';
284			end;
285			end;
286
287			procedure TForm1.EmployeesJOB_CODEChange(Sender: TField);
288			begin
289			Countries.Active := false;
290			Countries.Active := true;
291			end;
292
293			procedure TForm1.EmployeesJOB_GRADEChange(Sender: TField);
294			begin
295			JobCodes.Active := false;
296			JobCodes.Active := true;
297			Countries.Active := false;
298			Countries.Active := true;
299			end;
300
301			end.
302