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, 4 months ago) by tony
Content type:	text/x-pascal
File size:	5199 byte(s)
Log Message:	Protect missing database name error in property editor
#	User	Rev	Content
1	tony	33	(*
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	tony	80	* The Original Code is (C) 2011-17 Tony Whyman, MWA Software
19	tony	33	* (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	tony	80	Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs, ExtCtrls,
35			StdCtrls, ComCtrls, db, IBDatabase, IBCustomDataSet, IBQuery, IBSQL,
36			IBLookupComboEditBox, IB;
37	tony	33
38			type
39
40			{ TGeneratorEditor }
41
42			TGeneratorEditor = class(TForm)
43			Bevel1: TBevel;
44			Button1: TButton;
45			Button2: TButton;
46	tony	80	GeneratorSource: TDataSource;
47			GeneratorQuery: TIBQuery;
48			GeneratorNames: TIBLookupComboEditBox;
49			FieldNames: TIBLookupComboEditBox;
50			IdentifyStatementSQL: TIBSQL;
51	tony	33	IncrementBy: TEdit;
52			Label1: TLabel;
53			Label2: TLabel;
54			Label3: TLabel;
55			OnNewRecord: TRadioButton;
56			OnPost: TRadioButton;
57	tony	80	PrimaryKeys: TIBQuery;
58			PrimaryKeySource: TDataSource;
59			SQLTransaction: TIBTransaction;
60	tony	33	UpDown1: TUpDown;
61			procedure FormClose(Sender: TObject; var CloseAction: TCloseAction);
62			procedure FormShow(Sender: TObject);
63	tony	80	procedure PrimaryKeysBeforeOpen(DataSet: TDataSet);
64	tony	33	private
65			FGenerator: TIBGenerator;
66			{ private declarations }
67	tony	80	function GetTableName: string;
68	tony	33	procedure SetGenerator(const AValue: TIBGenerator);
69	tony	80	procedure SetDatabase(aDatabase: TIBDatabase);
70	tony	33	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			{$R *.lfm}
81
82			function EditGenerator(AGenerator: TIBGenerator): boolean;
83			var Database: TIBDatabase;
84			begin
85			Result := false;
86			if (AGenerator.Owner is TIBQuery and ((AGenerator.Owner as TIBQuery).SQL.Text = '')) or
87			(AGenerator.Owner is TIBDataSet and ((AGenerator.Owner as TIBDataSet).SelectSQL.Text = '')) then
88			begin
89			ShowMessage('No Select SQL Found!');
90			Exit
91			end;
92			Database := AGenerator.Owner.Database;
93
94			if assigned(Database) then
95			try
96			Database.Connected := true;
97			except on E: Exception do
98			ShowMessage(E.Message)
99			end;
100
101			with TGeneratorEditor.Create(Application) do
102			try
103			Generator := AGenerator;
104			Result := ShowModal = mrOK
105			finally
106			Free
107			end;
108			end;
109
110			{ TGeneratorEditor }
111
112			procedure TGeneratorEditor.FormShow(Sender: TObject);
113			begin
114	tony	81	if (PrimaryKeys.Database = nil) or not PrimaryKeys.Database.Connected then Exit;
115	tony	80	SQLTransaction.Active := true;
116			PrimaryKeys.Active := true;
117			GeneratorQuery.Active := true;
118	tony	33	if Generator.Generator <> '' then
119	tony	80	GeneratorQuery.Locate('RDB$GENERATOR_NAME',Generator.Generator,[]);
120	tony	33	if Generator.Field <> '' then
121	tony	80	PrimaryKeys.Locate('ColumnName',UpperCase(Generator.Field),[]);
122	tony	33
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	tony	80	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	tony	33	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	tony	80	SetDatabase(Generator.Owner.Database);
175	tony	33	end;
176
177	tony	80	procedure TGeneratorEditor.SetDatabase(aDatabase: TIBDatabase);
178	tony	33	begin
179			if not assigned(ADatabase) then
180			raise Exception.Create('A Database must be assigned');
181	tony	80	PrimaryKeys.Database := aDatabase;
182			GeneratorQuery.Database := aDatabase;
183			IdentifyStatementSQL.Database := aDatabase;
184			SQLTransaction.DefaultDatabase := aDatabase;
185	tony	33	end;
186
187			end.
188