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) 2011-17 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, db, IBDatabase, IBCustomDataSet, IBQuery, IBSQL,
  IBLookupComboEditBox, IB;

type

  { TGeneratorEditor }

  TGeneratorEditor = class(TForm)
    Bevel1: TBevel;
    Button1: TButton;
    Button2: TButton;
    GeneratorSource: TDataSource;
    GeneratorQuery: TIBQuery;
    GeneratorNames: TIBLookupComboEditBox;
    FieldNames: TIBLookupComboEditBox;
    IdentifyStatementSQL: TIBSQL;
    IncrementBy: TEdit;
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    OnNewRecord: TRadioButton;
    OnPost: TRadioButton;
    PrimaryKeys: TIBQuery;
    PrimaryKeySource: TDataSource;
    SQLTransaction: TIBTransaction;
    UpDown1: TUpDown;
    procedure FormClose(Sender: TObject; var CloseAction: TCloseAction);
    procedure FormShow(Sender: TObject);
    procedure PrimaryKeysBeforeOpen(DataSet: TDataSet);
  private
    FGenerator: TIBGenerator;
    { private declarations }
    function GetTableName: string;
    procedure SetGenerator(const AValue: TIBGenerator);
    procedure SetDatabase(aDatabase: TIBDatabase);
  public
    { public declarations }
    property Generator: TIBGenerator read FGenerator write SetGenerator;
  end; 

function EditGenerator(AGenerator: TIBGenerator): boolean;

implementation


{$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
  if (PrimaryKeys.Database = nil) or not PrimaryKeys.Database.Connected then Exit;
  SQLTransaction.Active := true;
  PrimaryKeys.Active := true;
  GeneratorQuery.Active := true;
  if Generator.Generator <> '' then
    GeneratorQuery.Locate('RDB$GENERATOR_NAME',Generator.Generator,[]);
  if Generator.Field <> '' then
    PrimaryKeys.Locate('ColumnName',UpperCase(Generator.Field),[]);

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

procedure TGeneratorEditor.PrimaryKeysBeforeOpen(DataSet: TDataSet);
begin
  PrimaryKeys.ParamByName('RDB$RELATION_NAME').AsString := GetTableName;
end;

function TGeneratorEditor.GetTableName: string;
begin
  Result := '';
  with IdentifyStatementSQL do
  begin
    Transaction.Active := true;
    if FGenerator.Owner is TIBQuery then
      SQL.Assign((FGenerator.Owner as TIBQuery).SQL)
    else
      SQL.Assign((FGenerator.Owner as TIBDataset).SelectSQL);
    try
      Prepare;
      if (SQLStatementType = SQLSelect) and (MetaData.Count > 0) then
        Result := MetaData[0].GetRelationName;
    except on E:EIBError do
  //      ShowMessage(E.Message);
    end;
  end;
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.SetGenerator(const AValue: TIBGenerator);
begin
  FGenerator := AValue;
  SetDatabase(Generator.Owner.Database);
end;

procedure TGeneratorEditor.SetDatabase(aDatabase: TIBDatabase);
begin
  if not assigned(ADatabase) then
    raise Exception.Create('A Database must be assigned');
  PrimaryKeys.Database := aDatabase;
  GeneratorQuery.Database := aDatabase;
  IdentifyStatementSQL.Database := aDatabase;
  SQLTransaction.DefaultDatabase := aDatabase;
end;

end.

Revision:	81
Committed:	Mon Jan 1 11:31:10 2018 UTC (6 years, 3 months ago) by tony
Content type:	text/x-pascal
File size:	5199 byte(s)
Log Message:	Protect missing database name error in property editor
#	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) 2011-17 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, ExtCtrls,
35	StdCtrls, ComCtrls, db, IBDatabase, IBCustomDataSet, IBQuery, IBSQL,
36	IBLookupComboEditBox, IB;
37
38	type
39
40	{ TGeneratorEditor }
41
42	TGeneratorEditor = class(TForm)
43	Bevel1: TBevel;
44	Button1: TButton;
45	Button2: TButton;
46	GeneratorSource: TDataSource;
47	GeneratorQuery: TIBQuery;
48	GeneratorNames: TIBLookupComboEditBox;
49	FieldNames: TIBLookupComboEditBox;
50	IdentifyStatementSQL: TIBSQL;
51	IncrementBy: TEdit;
52	Label1: TLabel;
53	Label2: TLabel;
54	Label3: TLabel;
55	OnNewRecord: TRadioButton;
56	OnPost: TRadioButton;
57	PrimaryKeys: TIBQuery;
58	PrimaryKeySource: TDataSource;
59	SQLTransaction: TIBTransaction;
60	UpDown1: TUpDown;
61	procedure FormClose(Sender: TObject; var CloseAction: TCloseAction);
62	procedure FormShow(Sender: TObject);
63	procedure PrimaryKeysBeforeOpen(DataSet: TDataSet);
64	private
65	FGenerator: TIBGenerator;
66	{ private declarations }
67	function GetTableName: string;
68	procedure SetGenerator(const AValue: TIBGenerator);
69	procedure SetDatabase(aDatabase: TIBDatabase);
70	public
71	{ public declarations }
72	property Generator: TIBGenerator read FGenerator write SetGenerator;
73	end;
74
75	function EditGenerator(AGenerator: TIBGenerator): boolean;
76
77	implementation
78
79
80	{$R *.lfm}
81
82	function EditGenerator(AGenerator: TIBGenerator): boolean;
83	var Database: TIBDatabase;
84	begin
85	Result := false;
86	if (AGenerator.Owner is TIBQuery and ((AGenerator.Owner as TIBQuery).SQL.Text = '')) or
87	(AGenerator.Owner is TIBDataSet and ((AGenerator.Owner as TIBDataSet).SelectSQL.Text = '')) then
88	begin
89	ShowMessage('No Select SQL Found!');
90	Exit
91	end;
92	Database := AGenerator.Owner.Database;
93
94	if assigned(Database) then
95	try
96	Database.Connected := true;
97	except on E: Exception do
98	ShowMessage(E.Message)
99	end;
100
101	with TGeneratorEditor.Create(Application) do
102	try
103	Generator := AGenerator;
104	Result := ShowModal = mrOK
105	finally
106	Free
107	end;
108	end;
109
110	{ TGeneratorEditor }
111
112	procedure TGeneratorEditor.FormShow(Sender: TObject);
113	begin
114	if (PrimaryKeys.Database = nil) or not PrimaryKeys.Database.Connected then Exit;
115	SQLTransaction.Active := true;
116	PrimaryKeys.Active := true;
117	GeneratorQuery.Active := true;
118	if Generator.Generator <> '' then
119	GeneratorQuery.Locate('RDB$GENERATOR_NAME',Generator.Generator,[]);
120	if Generator.Field <> '' then
121	PrimaryKeys.Locate('ColumnName',UpperCase(Generator.Field),[]);
122
123	if Generator.ApplyOnEvent = gaeOnNewRecord then
124	OnNewRecord.Checked := true
125	else
126	OnPost.Checked := true;
127	IncrementBy.Text := IntToStr(Generator.Increment);
128	end;
129
130	procedure TGeneratorEditor.PrimaryKeysBeforeOpen(DataSet: TDataSet);
131	begin
132	PrimaryKeys.ParamByName('RDB$RELATION_NAME').AsString := GetTableName;
133	end;
134
135	function TGeneratorEditor.GetTableName: string;
136	begin
137	Result := '';
138	with IdentifyStatementSQL do
139	begin
140	Transaction.Active := true;
141	if FGenerator.Owner is TIBQuery then
142	SQL.Assign((FGenerator.Owner as TIBQuery).SQL)
143	else
144	SQL.Assign((FGenerator.Owner as TIBDataset).SelectSQL);
145	try
146	Prepare;
147	if (SQLStatementType = SQLSelect) and (MetaData.Count > 0) then
148	Result := MetaData[0].GetRelationName;
149	except on E:EIBError do
150	// ShowMessage(E.Message);
151	end;
152	end;
153	end;
154
155	procedure TGeneratorEditor.FormClose(Sender: TObject;
156	var CloseAction: TCloseAction);
157	begin
158	if ModalResult = mrOK then
159	begin
160	Generator.Generator := GeneratorNames.Text;
161	Generator.Field := FieldNames.Text;
162	if OnNewRecord.Checked then
163	Generator.ApplyOnEvent := gaeOnNewRecord
164	else
165	Generator.ApplyOnEvent := gaeOnPostRecord;
166	Generator.Increment := StrToInt(IncrementBy.Text)
167
168	end;
169	end;
170
171	procedure TGeneratorEditor.SetGenerator(const AValue: TIBGenerator);
172	begin
173	FGenerator := AValue;
174	SetDatabase(Generator.Owner.Database);
175	end;
176
177	procedure TGeneratorEditor.SetDatabase(aDatabase: TIBDatabase);
178	begin
179	if not assigned(ADatabase) then
180	raise Exception.Create('A Database must be assigned');
181	PrimaryKeys.Database := aDatabase;
182	GeneratorQuery.Database := aDatabase;
183	IdentifyStatementSQL.Database := aDatabase;
184	SQLTransaction.DefaultDatabase := aDatabase;
185	end;
186
187	end.
188