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{************************************************************************}
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{ }
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{ Borland Delphi Visual Component Library }
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{ InterBase Express core components }
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{ }
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{ Copyright (c) 1998-2000 Inprise Corporation }
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{ }
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{ InterBase Express is based in part on the product }
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{ Free IB Components, written by Gregory H. Deatz for }
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{ Hoagland, Longo, Moran, Dunst & Doukas Company. }
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{ Free IB Components is used under license. }
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{ }
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{ The contents of this file are subject to the InterBase }
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{ Public License Version 1.0 (the "License"); you may not }
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{ use this file except in compliance with the License. You }
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{ may obtain a copy of the License at http://www.Inprise.com/IPL.html }
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{ Software distributed under the License is distributed on }
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{ an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either }
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{ express or implied. See the License for the specific language }
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{ governing rights and limitations under the License. }
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{ The Original Code was created by InterBase Software Corporation }
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{ and its successors. }
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{ Portions created by Inprise Corporation are Copyright (C) Inprise }
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{ Corporation. All Rights Reserved. }
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{ Contributor(s): Jeff Overcash }
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{ }
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{************************************************************************}
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unit IBTransactionEdit;
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interface
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uses
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Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
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StdCtrls, IBDatabase, IB, ExtCtrls, IBXConst;
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type
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TIBTransactionEditForm = class(TForm)
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GroupBox1: TGroupBox;
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HelpBtn: TButton;
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Cancelbtn: TButton;
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OKBtn: TButton;
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rbSnapShot: TRadioButton;
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rbReadCommitted: TRadioButton;
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rbReadOnlyTableStability: TRadioButton;
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rbReadWriteTableStability: TRadioButton;
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TransactionParams: TMemo;
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Panel1: TPanel;
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Label1: TLabel;
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procedure OKBtnClick(Sender: TObject);
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procedure rbSnapShotClick(Sender: TObject);
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procedure rbReadCommittedClick(Sender: TObject);
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procedure rbReadOnlyTableStabilityClick(Sender: TObject);
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procedure rbReadWriteTableStabilityClick(Sender: TObject);
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procedure FormCreate(Sender: TObject);
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procedure HelpBtnClick(Sender: TObject);
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procedure TransactionParamsClick(Sender: TObject);
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procedure TransactionParamsExit(Sender: TObject);
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private
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{ Private declarations }
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Transaction: TIBTransaction;
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function Edit: Boolean;
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procedure ParseParams;
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procedure ClearParamSelection;
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public
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{ Public declarations }
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end;
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var
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IBTransactionEditForm: TIBTransactionEditForm;
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function EditIBtransaction(Atransaction: TIBtransaction): Boolean;
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implementation
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{$R *.DFM}
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uses
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LibHelp;
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function EditIBtransaction(ATransaction: TIBtransaction): Boolean;
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begin
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with TIBtransactionEditForm.Create(Application) do
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try
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Transaction := ATransaction;
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Result := Edit;
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finally
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Free;
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end;
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end;
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function TIBtransactionEditForm.Edit: Boolean;
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begin
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TransactionParams.Lines := Transaction.Params;
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ParseParams;
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Result := False;
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if ShowModal = mrOk then
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begin
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Transaction.Params := TransactionParams.Lines;
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Result := True;
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end;
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end;
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type
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TTransactionParam = (concurrency, read_committed, rec_version, nowait,
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consistency, read, write);
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TTransactionParams = set of TTransactionParam;
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procedure TIBTransactionEditForm.ParseParams;
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var
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I: Integer;
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st: string;
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Value: TTransactionParams;
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begin
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Value := [];
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for I := 0 to TransactionParams.Lines.Count - 1 do
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begin
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st := LowerCase(Trim(TransactionParams.Lines[I]));
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if st = '' then
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continue;
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if st = 'concurrency' then
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Include(Value, concurrency)
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else if st = 'read_committed' then
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Include(Value, read_committed)
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else if st = 'rec_version' then
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Include(Value, rec_version)
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else if st = 'nowait' then
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Include(Value, nowait)
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else if st = 'read' then
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Include(Value, read)
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else if st = 'write' then
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Include(Value, write)
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else if st = 'consistency' then
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Include(Value, consistency)
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else begin
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Value := [];
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break;
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end;
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end;
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ClearParamSelection;
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if Value = [concurrency, nowait] then
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rbSnapShot.Checked := True
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else if Value = [read_committed, rec_version, nowait] then
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rbReadCommitted.Checked := True
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else if Value = [read, consistency] then
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rbReadOnlyTableStability.Checked := True
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else if Value = [write, consistency] then
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rbReadWriteTableStability.Checked := True;
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end;
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procedure TIBTransactionEditForm.ClearParamSelection;
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begin
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rbSnapShot.Checked := False;
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rbReadCommitted.Checked := False;
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rbReadOnlyTableStability.Checked := False;
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rbReadWriteTableStability.Checked := False;
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end;
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procedure TIBTransactionEditForm.OKBtnClick(Sender: TObject);
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begin
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ModalResult := mrNone;
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if Transaction.Active then
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begin
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if MessageDlg(SCommitTransaction, mtConfirmation,
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mbOkCancel, 0) <> mrOk then Exit;
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Transaction.Rollback;
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end;
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ModalResult := mrOk;
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end;
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procedure TIBTransactionEditForm.FormCreate(Sender: TObject);
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begin
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HelpContext := hcDIBTransactionEdit;
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end;
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procedure TIBTransactionEditForm.HelpBtnClick(Sender: TObject);
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begin
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Application.HelpContext(HelpContext);
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end;
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procedure TIBTransactionEditForm.rbSnapShotClick(Sender: TObject);
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begin
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TransactionParams.clear;
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TransactionParams.Lines.Add('concurrency'); { do not localize }
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TransactionParams.Lines.Add('nowait'); { do not localize }
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end;
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procedure TIBTransactionEditForm.rbReadCommittedClick(Sender: TObject);
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begin
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TransactionParams.clear;
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TransactionParams.Lines.Add('read_committed'); { do not localize }
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TransactionParams.Lines.Add('rec_version'); { do not localize }
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TransactionParams.Lines.Add('nowait'); { do not localize }
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end;
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procedure TIBTransactionEditForm.rbReadOnlyTableStabilityClick(Sender: TObject);
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begin
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TransactionParams.clear;
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TransactionParams.Lines.Add('read'); { do not localize }
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TransactionParams.Lines.Add('consistency'); { do not localize }
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end;
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procedure TIBTransactionEditForm.rbReadWriteTableStabilityClick(Sender: TObject);
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begin
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TransactionParams.clear;
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TransactionParams.Lines.Add('write'); { do not localize }
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TransactionParams.Lines.Add('consistency'); { do not localize }
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end;
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procedure TIBTransactionEditForm.TransactionParamsClick(Sender: TObject);
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begin
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ClearParamSelection;
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end;
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procedure TIBTransactionEditForm.TransactionParamsExit(Sender: TObject);
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begin
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ParseParams;
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end;
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end.
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