trunk/design/ibgeneratoreditor.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) 2011 Tony Whyman, MWA Software
 *  (http://www.mwasoftware.co.uk).
 *
 *  All Rights Reserved.
 *
 *  Contributor(s): ______________________________________.
 *
*)

unit IBGeneratorEditor;

{$mode objfpc}{$H+}

interface

uses
  Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs,
  ExtCtrls, StdCtrls, ComCtrls, IBDatabase, IBCustomDataSet, IBSystemTables;

type

  { TGeneratorEditor }

  TGeneratorEditor = class(TForm)
    Bevel1: TBevel;
    Button1: TButton;
    Button2: TButton;
    GeneratorNames: TComboBox;
    FieldNames: TComboBox;
    IBTransaction1: TIBTransaction;
    IncrementBy: TEdit;
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    OnNewRecord: TRadioButton;
    OnPost: TRadioButton;
    UpDown1: TUpDown;
    procedure FormClose(Sender: TObject; var CloseAction: TCloseAction);
    procedure FormShow(Sender: TObject);
  private
    FGenerator: TIBGenerator;
    FTableName: string;
    FIBSystemTables: TIBSystemTables;
    { private declarations }
    procedure LoadGenerators;
    procedure LoadFieldNames;
    function GetPrimaryKey: string;
    procedure SetGenerator(const AValue: TIBGenerator);
    procedure SetDatabase(ADatabase: TIBDatabase; ATransaction: TIBTransaction);
  public
    { public declarations }
    constructor Create(TheOwner: TComponent); override;
    destructor Destroy; override;
    property Generator: TIBGenerator read FGenerator write SetGenerator;
  end; 

function EditGenerator(AGenerator: TIBGenerator): boolean;

implementation

uses IBQuery;

{$R *.lfm}

function EditGenerator(AGenerator: TIBGenerator): boolean;
var Database: TIBDatabase;
begin
  Result := false;
  if (AGenerator.Owner is TIBQuery and ((AGenerator.Owner as TIBQuery).SQL.Text = '')) or
   (AGenerator.Owner is TIBDataSet and ((AGenerator.Owner as TIBDataSet).SelectSQL.Text = '')) then
  begin
    ShowMessage('No Select SQL Found!');
    Exit
  end;
  Database := AGenerator.Owner.Database;

  if assigned(Database) then
    try
      Database.Connected := true;
    except on E: Exception do
      ShowMessage(E.Message)
    end;

    with TGeneratorEditor.Create(Application) do
    try
      Generator := AGenerator;
      Result := ShowModal = mrOK
    finally
      Free
    end;
end;

{ TGeneratorEditor }

procedure TGeneratorEditor.FormShow(Sender: TObject);
begin
  LoadGenerators;
  LoadFieldNames;
  if Generator.Generator <> '' then
    GeneratorNames.ItemIndex := GeneratorNames.Items.IndexOf(Generator.Generator);
  if Generator.Field <> '' then
    FieldNames.ItemIndex := FieldNames.Items.IndexOf(UpperCase(Generator.Field))
  else
    FieldNames.ItemIndex := FieldNames.Items.IndexOf(GetPrimaryKey);

  if FieldNames.ItemIndex = -1 then
    FieldNames.Text := Generator.Field;

  if Generator.ApplyOnEvent = gaeOnNewRecord then
    OnNewRecord.Checked := true
  else
    OnPost.Checked := true;
  IncrementBy.Text := IntToStr(Generator.Increment);
end;

procedure TGeneratorEditor.FormClose(Sender: TObject;
  var CloseAction: TCloseAction);
begin
  if ModalResult = mrOK then
  begin
    Generator.Generator := GeneratorNames.Text;
    Generator.Field := FieldNames.Text;
    if OnNewRecord.Checked then
      Generator.ApplyOnEvent := gaeOnNewRecord
    else
      Generator.ApplyOnEvent := gaeOnPostRecord;
    Generator.Increment := StrToInt(IncrementBy.Text)

  end;
end;

procedure TGeneratorEditor.LoadGenerators;
begin
  FIBSystemTables.GetGenerators(GeneratorNames.Items);
  if GeneratorNames.Items.Count > 0 then
    GeneratorNames.ItemIndex := 0
end;

procedure TGeneratorEditor.LoadFieldNames;
begin
  if FGenerator.Owner is TIBDataSet then
    FIBSystemTables.GetTableAndColumns((FGenerator.Owner as TIBDataSet).SelectSQL.Text,FTableName,FieldNames.Items)
  else
  if FGenerator.Owner is TIBQuery then
    FIBSystemTables.GetTableAndColumns((FGenerator.Owner as TIBQuery).SQL.Text,FTableName,FieldNames.Items)
  else
    raise Exception.CreateFmt('Don''t know how to edit a %s',[FGenerator.Owner.ClassName])
end;

function TGeneratorEditor.GetPrimaryKey: string;
var Keys: TStringList;
begin
  Result := '';
  Keys := TStringList.Create;
  try
    FIBSystemTables.GetPrimaryKeys(FTableName,Keys);
    if Keys.Count > 0 then
      Result := Keys[0];
  finally
    Keys.Free
  end;
end;

procedure TGeneratorEditor.SetGenerator(const AValue: TIBGenerator);
begin
  FGenerator := AValue;
  IBTransaction1.DefaultDatabase := Generator.Owner.Database;
  SetDatabase(Generator.Owner.Database,IBTransaction1);
end;

procedure TGeneratorEditor.SetDatabase(ADatabase: TIBDatabase; ATransaction: TIBTransaction);
begin
  if not assigned(ADatabase) then
    raise Exception.Create('A Database must be assigned');
  if not assigned(ATransaction) then
    raise Exception.Create('A Transaction must be assigned');
  FIBSystemTables.SelectDatabase( ADatabase,ATransaction)
end;

constructor TGeneratorEditor.Create(TheOwner: TComponent);
begin
  inherited Create(TheOwner);
  FIBSystemTables := TIBSystemTables.Create
end;

destructor TGeneratorEditor.Destroy;
begin
  if assigned(FIBSystemTables) then FIBSystemTables.Free;
  inherited Destroy;
end;

end.

Revision:	33
Committed:	Sat Jul 18 12:30:52 2015 UTC (9 years, 3 months ago) by tony
Content type:	text/x-pascal
File size:	5819 byte(s)
Log Message:	Committing updates for Release R1-3-1
#	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) 2011 Tony Whyman, MWA Software
19	* (http://www.mwasoftware.co.uk).
20	*
21	* All Rights Reserved.
22	*
23	* Contributor(s): ______________________________________.
24	*
25	*)
26
27	unit IBGeneratorEditor;
28
29	{$mode objfpc}{$H+}
30
31	interface
32
33	uses
34	Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs,
35	ExtCtrls, StdCtrls, ComCtrls, IBDatabase, IBCustomDataSet, IBSystemTables;
36
37	type
38
39	{ TGeneratorEditor }
40
41	TGeneratorEditor = class(TForm)
42	Bevel1: TBevel;
43	Button1: TButton;
44	Button2: TButton;
45	GeneratorNames: TComboBox;
46	FieldNames: TComboBox;
47	IBTransaction1: TIBTransaction;
48	IncrementBy: TEdit;
49	Label1: TLabel;
50	Label2: TLabel;
51	Label3: TLabel;
52	OnNewRecord: TRadioButton;
53	OnPost: TRadioButton;
54	UpDown1: TUpDown;
55	procedure FormClose(Sender: TObject; var CloseAction: TCloseAction);
56	procedure FormShow(Sender: TObject);
57	private
58	FGenerator: TIBGenerator;
59	FTableName: string;
60	FIBSystemTables: TIBSystemTables;
61	{ private declarations }
62	procedure LoadGenerators;
63	procedure LoadFieldNames;
64	function GetPrimaryKey: string;
65	procedure SetGenerator(const AValue: TIBGenerator);
66	procedure SetDatabase(ADatabase: TIBDatabase; ATransaction: TIBTransaction);
67	public
68	{ public declarations }
69	constructor Create(TheOwner: TComponent); override;
70	destructor Destroy; override;
71	property Generator: TIBGenerator read FGenerator write SetGenerator;
72	end;
73
74	function EditGenerator(AGenerator: TIBGenerator): boolean;
75
76	implementation
77
78	uses IBQuery;
79
80	{$R *.lfm}
81
82	function EditGenerator(AGenerator: TIBGenerator): boolean;
83	var Database: TIBDatabase;
84	begin
85	Result := false;
86	if (AGenerator.Owner is TIBQuery and ((AGenerator.Owner as TIBQuery).SQL.Text = '')) or
87	(AGenerator.Owner is TIBDataSet and ((AGenerator.Owner as TIBDataSet).SelectSQL.Text = '')) then
88	begin
89	ShowMessage('No Select SQL Found!');
90	Exit
91	end;
92	Database := AGenerator.Owner.Database;
93
94	if assigned(Database) then
95	try
96	Database.Connected := true;
97	except on E: Exception do
98	ShowMessage(E.Message)
99	end;
100
101	with TGeneratorEditor.Create(Application) do
102	try
103	Generator := AGenerator;
104	Result := ShowModal = mrOK
105	finally
106	Free
107	end;
108	end;
109
110	{ TGeneratorEditor }
111
112	procedure TGeneratorEditor.FormShow(Sender: TObject);
113	begin
114	LoadGenerators;
115	LoadFieldNames;
116	if Generator.Generator <> '' then
117	GeneratorNames.ItemIndex := GeneratorNames.Items.IndexOf(Generator.Generator);
118	if Generator.Field <> '' then
119	FieldNames.ItemIndex := FieldNames.Items.IndexOf(UpperCase(Generator.Field))
120	else
121	FieldNames.ItemIndex := FieldNames.Items.IndexOf(GetPrimaryKey);
122
123	if FieldNames.ItemIndex = -1 then
124	FieldNames.Text := Generator.Field;
125
126	if Generator.ApplyOnEvent = gaeOnNewRecord then
127	OnNewRecord.Checked := true
128	else
129	OnPost.Checked := true;
130	IncrementBy.Text := IntToStr(Generator.Increment);
131	end;
132
133	procedure TGeneratorEditor.FormClose(Sender: TObject;
134	var CloseAction: TCloseAction);
135	begin
136	if ModalResult = mrOK then
137	begin
138	Generator.Generator := GeneratorNames.Text;
139	Generator.Field := FieldNames.Text;
140	if OnNewRecord.Checked then
141	Generator.ApplyOnEvent := gaeOnNewRecord
142	else
143	Generator.ApplyOnEvent := gaeOnPostRecord;
144	Generator.Increment := StrToInt(IncrementBy.Text)
145
146	end;
147	end;
148
149	procedure TGeneratorEditor.LoadGenerators;
150	begin
151	FIBSystemTables.GetGenerators(GeneratorNames.Items);
152	if GeneratorNames.Items.Count > 0 then
153	GeneratorNames.ItemIndex := 0
154	end;
155
156	procedure TGeneratorEditor.LoadFieldNames;
157	begin
158	if FGenerator.Owner is TIBDataSet then
159	FIBSystemTables.GetTableAndColumns((FGenerator.Owner as TIBDataSet).SelectSQL.Text,FTableName,FieldNames.Items)
160	else
161	if FGenerator.Owner is TIBQuery then
162	FIBSystemTables.GetTableAndColumns((FGenerator.Owner as TIBQuery).SQL.Text,FTableName,FieldNames.Items)
163	else
164	raise Exception.CreateFmt('Don''t know how to edit a %s',[FGenerator.Owner.ClassName])
165	end;
166
167	function TGeneratorEditor.GetPrimaryKey: string;
168	var Keys: TStringList;
169	begin
170	Result := '';
171	Keys := TStringList.Create;
172	try
173	FIBSystemTables.GetPrimaryKeys(FTableName,Keys);
174	if Keys.Count > 0 then
175	Result := Keys[0];
176	finally
177	Keys.Free
178	end;
179	end;
180
181	procedure TGeneratorEditor.SetGenerator(const AValue: TIBGenerator);
182	begin
183	FGenerator := AValue;
184	IBTransaction1.DefaultDatabase := Generator.Owner.Database;
185	SetDatabase(Generator.Owner.Database,IBTransaction1);
186	end;
187
188	procedure TGeneratorEditor.SetDatabase(ADatabase: TIBDatabase; ATransaction: TIBTransaction);
189	begin
190	if not assigned(ADatabase) then
191	raise Exception.Create('A Database must be assigned');
192	if not assigned(ATransaction) then
193	raise Exception.Create('A Transaction must be assigned');
194	FIBSystemTables.SelectDatabase( ADatabase,ATransaction)
195	end;
196
197	constructor TGeneratorEditor.Create(TheOwner: TComponent);
198	begin
199	inherited Create(TheOwner);
200	FIBSystemTables := TIBSystemTables.Create
201	end;
202
203	destructor TGeneratorEditor.Destroy;
204	begin
205	if assigned(FIBSystemTables) then FIBSystemTables.Free;
206	inherited Destroy;
207	end;
208
209	end.
210