david
960b25140d
git-svn-id: https://192.168.0.254/svn/Componentes.Terceros.DevExpressVCL@55 05c56307-c608-d34a-929d-697000501d7a
142 lines
5.6 KiB
ObjectPascal
142 lines
5.6 KiB
ObjectPascal
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{********************************************************************}
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{ }
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{ Developer Express Visual Component Library }
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{ ExpressDataController }
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{ }
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{ Copyright (c) 1998-2009 Developer Express Inc. }
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{ ALL RIGHTS RESERVED }
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{ }
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{ The entire contents of this file is protected by U.S. and }
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{ International Copyright Laws. Unauthorized reproduction, }
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{ reverse-engineering, and distribution of all or any portion of }
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{ the code contained in this file is strictly prohibited and may }
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{ result in severe civil and criminal penalties and will be }
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{ prosecuted to the maximum extent possible under the law. }
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{ }
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{ RESTRICTIONS }
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{ }
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{ THIS SOURCE CODE AND ALL RESULTING INTERMEDIATE FILES }
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{ (DCU, OBJ, DLL, ETC.) ARE CONFIDENTIAL AND PROPRIETARY TRADE }
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{ SECRETS OF DEVELOPER EXPRESS INC. THE REGISTERED DEVELOPER IS }
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{ LICENSED TO DISTRIBUTE THE EXPRESSDATACONTROLLER AND ALL }
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{ ACCOMPANYING VCL CONTROLS AS PART OF AN EXECUTABLE PROGRAM ONLY. }
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{ }
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{ THE SOURCE CODE CONTAINED WITHIN THIS FILE AND ALL RELATED }
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{ FILES OR ANY PORTION OF ITS CONTENTS SHALL AT NO TIME BE }
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{ COPIED, TRANSFERRED, SOLD, DISTRIBUTED, OR OTHERWISE MADE }
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{ AVAILABLE TO OTHER INDIVIDUALS WITHOUT EXPRESS WRITTEN CONSENT }
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{ AND PERMISSION FROM DEVELOPER EXPRESS INC. }
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{ }
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{ CONSULT THE END USER LICENSE AGREEMENT FOR INFORMATION ON }
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{ ADDITIONAL RESTRICTIONS. }
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{ }
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{********************************************************************}
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unit cxADOAdapters;
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{$I cxVer.inc}
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interface
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uses
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DB, cxDBData, cxFilter, cxDBFilter;
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type
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{ TcxADOProviderDetailFilterAdapter }
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TcxADOProviderDetailFilterAdapter = class(TcxDBProviderDetailFilterAdapter)
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public
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function IsCurrentQuery(ADataSet: TDataSet; const AParamNames: string; const AParamValues: Variant): Boolean; override;
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procedure ReopenSQL(ADataSet: TDataSet; const AParamNames: string; const AParamValues: Variant; var AReopened: Boolean); override;
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end;
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{ TcxADOFilterOperatorAdapter }
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TcxADOFilterOperatorAdapter = class(TcxDBFilterOperatorAdapter)
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public
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procedure PrepareOperatorClass(ASender: TObject; ADataSet: TDataSet;
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var AOperatorClass: TcxFilterOperatorClass); override;
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end;
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implementation
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uses
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TypInfo, ADODB, cxVariants;
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{ TcxADOProviderDetailFilterAdapter }
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function TcxADOProviderDetailFilterAdapter.IsCurrentQuery(ADataSet: TDataSet;
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const AParamNames: string; const AParamValues: Variant): Boolean;
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var
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AParameters: TParameters;
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begin
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Result := False;
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if IsPublishedProp(ADataSet, 'Parameters') then
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begin
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AParameters := GetObjectProp(ADataSet, 'Parameters') as TParameters;
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if AParameters <> nil then
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begin
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if VarEquals(AParameters.ParamValues[AParamNames], AParamValues) then
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Result := True;
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end;
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end;
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end;
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procedure TcxADOProviderDetailFilterAdapter.ReopenSQL(ADataSet: TDataSet;
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const AParamNames: string; const AParamValues: Variant; var AReopened: Boolean);
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var
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AParameters: TParameters;
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begin
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if IsPublishedProp(ADataSet, 'Parameters') then
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begin
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AParameters := GetObjectProp(ADataSet, 'Parameters') as TParameters;
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if AParameters <> nil then
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begin
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if VarEquals(AParameters.ParamValues[AParamNames], AParamValues) then
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ADataSet.First
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else
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begin
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ADataSet.DisableControls;
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try
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ADataSet.Active := False;
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AParameters.ParamValues[AParamNames] := AParamValues;
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ADataSet.Active := True;
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finally
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ADataSet.EnableControls;
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end;
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AReopened := True; // set Flag if Query reopened
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end;
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end;
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end;
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end;
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{ TcxADOFilterOperatorAdapter }
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procedure TcxADOFilterOperatorAdapter.PrepareOperatorClass(ASender: TObject;
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ADataSet: TDataSet; var AOperatorClass: TcxFilterOperatorClass);
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begin
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{if AOperatorClass.InheritsFrom(TcxFilterNullOperator) or
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AOperatorClass.InheritsFrom(TcxFilterNotNullOperator) then
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begin
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if (ADataSet is TADOQuery) or
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((ADataSet is TADODataSet) and (TADODataSet(ADataSet).CommandType = cmdText)) then
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begin
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if AOperatorClass.InheritsFrom(TcxFilterNotNullOperator) then
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AOperatorClass := TcxFilterSQLNotNullOperator
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else
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AOperatorClass := TcxFilterSQLNullOperator;
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end;
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end;}
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end;
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initialization
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cxDetailFilterControllers.RegisterAdapter(TCustomADODataSet, TcxADOProviderDetailFilterAdapter);
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cxFilterOperatorAdapters.RegisterAdapter(TCustomADODataSet, TcxADOFilterOperatorAdapter);
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finalization
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cxDetailFilterControllers.UnregisterAdapter(TCustomADODataSet, TcxADOProviderDetailFilterAdapter);
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cxFilterOperatorAdapters.UnregisterAdapter(TCustomADODataSet, TcxADOFilterOperatorAdapter);
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end.
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