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:	7
Committed:	Sun Aug 5 18:28:19 2012 UTC (11 years, 8 months ago) by tony
Content type:	text/x-pascal
File size:	5819 byte(s)
Log Message:	Committing updates for Release R1-0-0
#	User	Rev	Content
1	tony	7	(*
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	tony	5	unit IBGeneratorEditor;
28
29			{$mode objfpc}{$H+}
30
31			interface
32
33			uses
34	tony	7	Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs,
35	tony	5	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	tony	7	IBTransaction1: TIBTransaction;
48	tony	5	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	tony	7	uses IBQuery;
79
80			{$R *.lfm}
81
82	tony	5	function EditGenerator(AGenerator: TIBGenerator): boolean;
83			var Database: TIBDatabase;
84			begin
85			Result := false;
86	tony	7	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	tony	5	begin
89			ShowMessage('No Select SQL Found!');
90			Exit
91			end;
92	tony	7	Database := AGenerator.Owner.Database;
93
94	tony	5	if assigned(Database) then
95	tony	7	try
96			Database.Connected := true;
97			except on E: Exception do
98			ShowMessage(E.Message)
99	tony	5	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	tony	7	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	tony	5	else
121			FieldNames.ItemIndex := FieldNames.Items.IndexOf(GetPrimaryKey);
122
123	tony	7	if FieldNames.ItemIndex = -1 then
124			FieldNames.Text := Generator.Field;
125
126	tony	5	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	tony	7	Generator.Generator := GeneratorNames.Text;
139			Generator.Field := FieldNames.Text;
140	tony	5	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	tony	7	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	tony	5	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	tony	7	IBTransaction1.DefaultDatabase := Generator.Owner.Database;
185			SetDatabase(Generator.Owner.Database,IBTransaction1);
186	tony	5	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