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unit IBGeneratorEditor;
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{$mode objfpc}{$H+}
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interface
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uses
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Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
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ExtCtrls, StdCtrls, ComCtrls, IBDatabase, IBCustomDataSet, IBSystemTables;
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type
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{ TGeneratorEditor }
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TGeneratorEditor = class(TForm)
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Bevel1: TBevel;
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Button1: TButton;
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Button2: TButton;
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GeneratorNames: TComboBox;
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FieldNames: TComboBox;
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IncrementBy: TEdit;
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Label1: TLabel;
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Label2: TLabel;
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Label3: TLabel;
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OnNewRecord: TRadioButton;
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OnPost: TRadioButton;
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UpDown1: TUpDown;
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procedure FormClose(Sender: TObject; var CloseAction: TCloseAction);
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procedure FormShow(Sender: TObject);
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private
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FGenerator: TIBGenerator;
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FTableName: string;
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FIBSystemTables: TIBSystemTables;
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{ private declarations }
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procedure LoadGenerators;
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procedure LoadFieldNames;
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function GetPrimaryKey: string;
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procedure SetGenerator(const AValue: TIBGenerator);
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procedure SetDatabase(ADatabase: TIBDatabase; ATransaction: TIBTransaction);
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public
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{ public declarations }
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constructor Create(TheOwner: TComponent); override;
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destructor Destroy; override;
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property Generator: TIBGenerator read FGenerator write SetGenerator;
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end;
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function EditGenerator(AGenerator: TIBGenerator): boolean;
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implementation
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function EditGenerator(AGenerator: TIBGenerator): boolean;
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var Database: TIBDatabase;
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begin
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Result := false;
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if AGenerator.SelectSQL = '' then
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begin
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ShowMessage('No Select SQL Found!');
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Exit
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end;
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if assigned(Database) then
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begin
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Database := AGenerator.Owner.Database;
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if not assigned(AGenerator.Owner.Transaction)then
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begin
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ShowMessage('No Transaction assigned to DataSet!');
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Exit
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end;
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Database.Connected := true;
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with TGeneratorEditor.Create(Application) do
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try
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Generator := AGenerator;
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Result := ShowModal = mrOK
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finally
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Free
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end;
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end;
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end;
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{ TGeneratorEditor }
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procedure TGeneratorEditor.FormShow(Sender: TObject);
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begin
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LoadGenerators;
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LoadFieldNames;
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if Generator.GeneratorName <> '' then
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GeneratorNames.ItemIndex := GeneratorNames.Items.IndexOf(Generator.GeneratorName);
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if Generator.FieldName <> '' then
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FieldNames.ItemIndex := FieldNames.Items.IndexOf(Generator.FieldName)
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else
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FieldNames.ItemIndex := FieldNames.Items.IndexOf(GetPrimaryKey);
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if Generator.ApplyOnEvent = gaeOnNewRecord then
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OnNewRecord.Checked := true
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else
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OnPost.Checked := true;
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IncrementBy.Text := IntToStr(Generator.Increment);
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end;
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procedure TGeneratorEditor.FormClose(Sender: TObject;
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var CloseAction: TCloseAction);
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begin
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if ModalResult = mrOK then
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begin
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Generator.GeneratorName := GeneratorNames.Text;
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Generator.FieldName := FieldNames.Text;
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if OnNewRecord.Checked then
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Generator.ApplyOnEvent := gaeOnNewRecord
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else
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Generator.ApplyOnEvent := gaeOnPostRecord;
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Generator.Increment := StrToInt(IncrementBy.Text)
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end;
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end;
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procedure TGeneratorEditor.LoadGenerators;
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begin
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FIBSystemTables.GetGenerators(GeneratorNames.Items);
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if GeneratorNames.Items.Count > 0 then
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GeneratorNames.ItemIndex := 0
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end;
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procedure TGeneratorEditor.LoadFieldNames;
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begin
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FIBSystemTables.GetTableAndColumns(FGenerator.SelectSQL,FTableName,FieldNames.Items)
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end;
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function TGeneratorEditor.GetPrimaryKey: string;
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var Keys: TStringList;
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begin
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Result := '';
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Keys := TStringList.Create;
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try
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FIBSystemTables.GetPrimaryKeys(FTableName,Keys);
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if Keys.Count > 0 then
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Result := Keys[0];
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finally
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Keys.Free
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end;
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end;
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procedure TGeneratorEditor.SetGenerator(const AValue: TIBGenerator);
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begin
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FGenerator := AValue;
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SetDatabase(Generator.Owner.Database,Generator.Owner.Transaction);
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end;
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procedure TGeneratorEditor.SetDatabase(ADatabase: TIBDatabase; ATransaction: TIBTransaction);
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begin
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if not assigned(ADatabase) then
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raise Exception.Create('A Database must be assigned');
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if not assigned(ATransaction) then
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raise Exception.Create('A Transaction must be assigned');
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FIBSystemTables.SelectDatabase( ADatabase,ATransaction)
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end;
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constructor TGeneratorEditor.Create(TheOwner: TComponent);
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begin
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inherited Create(TheOwner);
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FIBSystemTables := TIBSystemTables.Create
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end;
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destructor TGeneratorEditor.Destroy;
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begin
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if assigned(FIBSystemTables) then FIBSystemTables.Free;
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inherited Destroy;
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end;
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initialization
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{$I ibgeneratoreditor.lrs}
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end.
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