david
fd289722e5
git-svn-id: https://192.168.0.254/svn/Componentes.Terceros.DevExpressVCL@29 05c56307-c608-d34a-929d-697000501d7a
2578 lines
78 KiB
ObjectPascal
2578 lines
78 KiB
ObjectPascal
{*******************************************************************}
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{ }
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{ ExpressWeb Framework by Developer Express }
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{ Web Data Library }
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{ }
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{ Copyright (c) 2000-2008 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 EXPRESSWEB FRAMEWORK AND ALL }
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{ ACCOMPANYING VCL CLASSES AS PART OF AN EXECUTABLE WEB }
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{ APPLICATION 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 cxWebData;
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{$I cxVer.inc}
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interface
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uses Classes, TypInfo, SysUtils, DB,
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{$IFDEF VCL}
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Graphics,
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{$ENDIF}
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cxWebIntf, cxWebClasses, cxWebTypes, cxWebRender;
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const
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scxSortingAction = 'SORT';
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scxGroupingAction = 'GROUP';
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scxUnGroupingAction = 'UNGROUP';
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scxExpandingAction = 'EXPAND';
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scxDeleteAction = 'DELETE';
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scxStartEditAction = 'STARTEDIT';
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scxPostEditAction = 'POSTEDIT';
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scxCancelEditAction = 'CANCELEDIT';
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scxCancelInsertAction = 'CANCELINSERT';
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scxInsertAction = 'INSERT';
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scxRefreshAction = 'REFRESH';
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scxMoveToAction = 'MOVETO';
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scxMoveByAction = 'MOVEBY';
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scxInfoDelimiter = ';';
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type
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TcxGridDataControllerChange = (dccGlobal, dccItemAdded, dccItemRemoved, dccIndexesChanged);
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TcxCustomWebDataField = class;
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TcxStdWebDataField = class;
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TcxCustomWebDataSource = class;
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TcxStdWebDataSource = class;
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IcxWebDataSourceSupport = interface
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['{48715446-DDBD-4F20-BF6E-7332FF53B112}']
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function GetDataSource: TcxCustomWebDataSource;
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procedure SetDataSource(Value: TcxCustomWebDataSource);
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procedure ChangedDataLayout(Sender: TcxCustomWebDataSource);
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procedure UpdateData(Sender: TcxCustomWebDataSource);
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property DataSource: TcxCustomWebDataSource read GetDataSource write SetDataSource;
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end;
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IcxDataSetSupport = interface
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['{94D3826C-84A4-4535-8D51-7951A06C533A}']
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function GetDataSet: TDataSet;
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procedure SetDataSet(Value: TDataSet);
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property DataSet: TDataSet read GetDataSet write SetDataSet;
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end;
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IcxWebViewDataSupport = interface
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['{66CB3E4C-915D-4479-ACFE-BC9CB4104216}']
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function GetFirstVisibleRow: Integer;
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function GetPageSize: Integer;
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procedure SetData(Value: Variant; DisplayText: string);
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end;
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TcxWebDataType = (dtValue, dtText, dtKey);
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TcxWebDataTypes = set of TcxWebDataType;
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IcxWebUpdateDataSupport = interface
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['{C104D95D-C04B-4E35-949A-96EFF281A711}']
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function CanGetData: Boolean;
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function GetData: Variant;
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function GetDataTypes: TcxWebDataTypes;
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end;
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TcxAbstractWebDataBinding = class(TPersistent)
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private
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FComponent: TComponent;
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protected
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function GetDataSource: TcxCustomWebDataSource; virtual; abstract;
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public
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constructor Create(AComponent: TComponent); virtual;
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procedure Assign(Source: TPersistent); override;
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property Component: TComponent read FComponent;
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property DataSource: TcxCustomWebDataSource read GetDataSource;
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end;
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TcxCustomWebDataBinding = class(TcxAbstractWebDataBinding)
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private
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FDataSource: TcxCustomWebDataSource;
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protected
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function GetFieldIndex: Integer; virtual;
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{ IcxWebViewDataSupport }
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function GetFirstVisibleRow: Integer; virtual;
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function GetPageSize: Integer; virtual;
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{ Data control render }
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procedure WriteControlScripts(HTMLTextBuilder: TcxHTMLTextBuilder; AControlClass: string); virtual;
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{ IcxWebDataSourceSupport }
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function GetDataSource: TcxCustomWebDataSource; override;
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procedure SetDataSource(Value: TcxCustomWebDataSource); virtual;
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procedure ChangedDataLayout(Sender: TcxCustomWebDataSource); virtual;
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procedure UpdateData(Sender: TcxCustomWebDataSource); virtual;
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public
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destructor Destroy; override;
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procedure Assign(Source: TPersistent); override;
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procedure Loaded; virtual;
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procedure Notification(AComponent: TComponent; Operation: TOperation); virtual;
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published
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property DataSource: TcxCustomWebDataSource read GetDataSource write SetDataSource;
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end;
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TcxDataFieldHelper = class
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private
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FField: TcxCustomWebDataField;
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function GetDataSource: TcxCustomWebDataSource;
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function GetIndex: Integer;
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protected
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function GetScriptData(ARecord: Integer): string; virtual;
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function ValidateValue(var Value: Variant): Boolean; virtual;
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function ValidateValueType(AType: TcxWebDataTypes): Boolean; virtual;
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public
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constructor Create(AField: TcxCustomWebDataField);
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property DataSource: TcxCustomWebDataSource read GetDataSource;
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property Field: TcxCustomWebDataField read FField;
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property Index: Integer read GetIndex;
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end;
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TcxDataFieldHelperClass = class of TcxDataFieldHelper;
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TcxStringFieldHelper = class(TcxDataFieldHelper)
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protected
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function GetScriptData(ARecord: Integer): string; override;
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function ValidateValue(var Value: Variant): Boolean; override;
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end;
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TcxIntegerFieldHelper = class(TcxDataFieldHelper)
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protected
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function GetScriptData(ARecord: Integer): string; override;
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function ValidateValue(var Value: Variant): Boolean; override;
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end;
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TcxCurrencyFieldHelper = class(TcxDataFieldHelper)
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protected
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function GetScriptData(ARecord: Integer): string; override;
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function ValidateValue(var Value: Variant): Boolean; override;
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end;
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TcxFloatFieldHelper = class(TcxDataFieldHelper)
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protected
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function GetScriptData(ARecord: Integer): string; override;
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function ValidateValue(var Value: Variant): Boolean; override;
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end;
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TcxDateTimeFieldHelper = class(TcxDataFieldHelper)
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protected
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function GetScriptData(ARecord: Integer): string; override;
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function ValidateValue(var Value: Variant): Boolean; override;
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end;
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TcxBooleanFieldHelper = class(TcxDataFieldHelper)
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protected
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function GetScriptData(ARecord: Integer): string; override;
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function ValidateValue(var Value: Variant): Boolean; override;
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end;
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TcxImageFieldHelper = class(TcxDataFieldHelper)
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protected
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function GetScriptData(ARecord: Integer): string; override;
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function ValidateValue(var Value: Variant): Boolean; override;
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function ValidateValueType(AType: TcxWebDataTypes): Boolean; override;
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end;
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TcxMemoFieldHelper = class(TcxDataFieldHelper)
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protected
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function GetScriptData(ARecord: Integer): string; override;
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function ValidateValue(var Value: Variant): Boolean; override;
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function ValidateValueType(AType: TcxWebDataTypes): Boolean; override;
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end;
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TcxBinaryFieldHelper = class(TcxDataFieldHelper)
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protected
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function GetScriptData(ARecord: Integer): string; override;
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function ValidateValue(var Value: Variant): Boolean; override;
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function ValidateValueType(AType: TcxWebDataTypes): Boolean; override;
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end;
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TcxCustomWebDataField = class(TCollectionItem)
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private
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FDisplayLabel: string;
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FFieldHelper: TcxDataFieldHelper;
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FName: string;
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FRequired: Boolean;
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procedure SetName(Value: string);
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protected
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function UniqueName: string;
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function GetDisplayName: string; override;
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function DataSource: TcxCustomWebDataSource; overload; virtual;
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public
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constructor Create(Collection: TCollection); override;
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destructor Destroy; override;
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function FieldHelper: TcxDataFieldHelper;
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function GetScriptData(ARecord: Integer): string;
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function ValidateValue(var AValue: Variant): Boolean;
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function ValidateValueType(AType: TcxWebDataTypes): Boolean;
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published
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property DisplayLabel: string read FDisplayLabel write FDisplayLabel;
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property Name: string read FName write SetName;
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property Required: Boolean read FRequired write FRequired;
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end;
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TcxCustomWebDataFieldClass = class of TcxCustomWebDataField;
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TcxCustomWebDataFields = class(TCollection)
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private
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FDataSource: TcxCustomWebDataSource;
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function GetItem(Index: Integer): TcxCustomWebDataField;
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procedure SetItem(Index: Integer; Value: TcxCustomWebDataField);
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protected
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function GetOwner: TPersistent; override;
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class function FieldClass: TcxCustomWebDataFieldClass; virtual;
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public
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constructor Create(ADataSource: TcxCustomWebDataSource);
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function Add: TcxCustomWebDataField;
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function DataSource: TcxCustomWebDataSource; overload; virtual;
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property Items[Index: Integer]: TcxCustomWebDataField read GetItem write SetItem; default;
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end;
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TcxStdWebDataField = class(TcxCustomWebDataField)
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private
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FFieldName: string;
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function GetDataSet: TDataSet;
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procedure SetFieldName(const Value: string);
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protected
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function DataSource: TcxStdWebDataSource; reintroduce; overload;
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public
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property DataSet: TDataSet read GetDataSet;
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property FieldName: string read FFieldName write SetFieldName;
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end;
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TcxStdWebDataFields = class(TcxCustomWebDataFields)
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private
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function GetItem(Index: Integer): TcxStdWebDataField;
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procedure SetItem(Index: Integer; Value: TcxStdWebDataField);
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protected
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class function FieldClass: TcxCustomWebDataFieldClass; override;
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public
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function Add: TcxStdWebDataField;
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function DataSource: TcxStdWebDataSource; reintroduce; overload;
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property Items[Index: Integer]: TcxStdWebDataField read GetItem write SetItem; default;
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end;
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TcxWebDataSourceEvent = (dseOnAfterSort, dseOnAfterGroup, dseOnAfterUngroup,
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dseOnAfterExpand, dseOnAfterMove, dseOnBeforeSort, dseOnBeforeGroup,
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dseOnBeforeUngroup, dseOnBeforeExpand, dseOnBeforeMove, dseOnBeforeDelete,
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dseOnBeforeInsert, dseOnBeforeStartEdit, dseOnBeforePostEdit, dseOnBeforeCancelEdit,
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dseOnBeforeRefresh);
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TcxWebDataSourceEventsHelper = class(TcxWebScriptEventsHelper)
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protected
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function EventName(const AEvent: Integer): string; override;
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function EventProcParams(const AEvent: Integer): string; override;
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function ScriptObject: string; override;
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public
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function EventTypeInfo: PTypeInfo; override;
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end;
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TcxWebDataSortOrder = (wsoNone, wsoAscending, wsoDescending);
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TcxUpdateType = (utLayout, utData);
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TcxWebDataSourceState = (browsing, editing, inserting);
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TcxAllowingDataEvent = procedure (Sender: TObject; ARowIndex: Integer; var AllowAction: Boolean) of object;
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TcxDataEvent = procedure (Sender: TObject; ARowIndex: Integer) of object;
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TcxSetInsertValueEvent = procedure(Sender: TObject; AItemIndex, ARowIndex: Integer;
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var AValue: Variant; var CanSet: Boolean) of object;
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TcxSetEditValueEvent = procedure (Sender: TObject; AItemIndex, ARowIndex: Integer;
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var AValue: Variant; var CanSet: Boolean) of object;
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TcxCustomWebDataSource = class(TcxWebComponent)
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private
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FAllowEditing: Boolean;
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FFields: TcxCustomWebDataFields;
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FInsertingValues: array of Variant;
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FIsEditing: Boolean;
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FIsInserting: Boolean;
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FKeyFieldName: string;
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FLoadAllRecords: Boolean;
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FUpdateLock: Integer;
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FClientsList: TList;
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FOnAfterPost: TcxDataEvent;
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FOnBeforePost: TcxAllowingDataEvent;
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FOnCancelEdit: TcxDataEvent;
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FOnDeleted: TcxDataEvent;
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FOnDeleting: TcxAllowingDataEvent;
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FOnInserted: TcxDataEvent;
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FOnInserting: TcxAllowingDataEvent;
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FOnScrolled: TcxDataEvent;
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FOnScrolling: TcxAllowingDataEvent;
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FOnSetInsertValue: TcxSetInsertValueEvent;
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FOnSetEditValue: TcxSetEditValueEvent;
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FOnStartEdit: TcxAllowingDataEvent;
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function GetClient(Index: Integer): TComponent;
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function GetClientCount: Integer;
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function GetFullName: string;
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function GetState: TcxWebDataSourceState;
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procedure SetAllowEditing(Value: Boolean);
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procedure SetIsEditing(Value: Boolean);
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procedure SetIsInserting(Value: Boolean);
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procedure SetKeyFieldName(Value: string);
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{ Action operations }
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procedure WebDelete(const AParameters: TcxActionParameters); virtual;
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procedure WebStartEdit(const AParameters: TcxActionParameters); virtual;
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procedure WebPostEdit(const AParameters: TcxActionParameters); virtual;
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procedure WebCancelEdit(const AParameters: TcxActionParameters); virtual;
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procedure WebInsert(const AParameters: TcxActionParameters); virtual;
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procedure WebRefresh(const AParameters: TcxActionParameters); virtual;
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procedure WebMoveTo(const AParameters: TcxActionParameters); virtual;
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procedure WebMoveBy(const AParameters: TcxActionParameters); virtual;
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protected
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procedure Loaded; override;
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function CanEdit: Boolean; virtual;
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function GetAllowEditing: Boolean; virtual;
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function GetAllowExpanding: Boolean; virtual;
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function GetAllowGrouping: Boolean; virtual;
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function GetAllowSorting: Boolean; virtual;
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function GetKeyFieldName: string; virtual;
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{ actions }
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procedure DoAfterPerformActions; override;
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procedure RegisterActions; override;
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{ events }
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function GetWebEventsHelper: TcxWebDataSourceEventsHelper;
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class function GetWebEventsHelperClass: TcxWebEventsHelperClass; override;
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property WebEventsHelper: TcxWebDataSourceEventsHelper read GetWebEventsHelper;
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{ values }
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function CanSetValues: Boolean; override;
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procedure DoAfterSetValues; override;
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procedure DoSetValues; override;
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procedure RegisterValues; override;
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procedure SynchronizeSelection; virtual;
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procedure SynchronizeInsertingValues; virtual;
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{ Renderers }
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procedure RegisterRenderers; override;
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{ Fields }
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function GetFields: TcxCustomWebDataFields; overload; virtual;
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procedure SetFields(Value: TcxCustomWebDataFields);
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{ Notification }
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procedure BeginUpdate;
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procedure CancelUpdate;
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procedure EndUpdate;
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property UpdateLock: Integer read FUpdateLock;
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procedure DataNotification(AUpdateType: TcxUpdateType); virtual;
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function NeedUpdateFields: Boolean; virtual;
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procedure UpdateDefaultFields; virtual;
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procedure UpdateDataLayout; virtual;
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procedure ChangedData(AClientName: string); virtual;
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{ Data layout }
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function GetFocusedRowIndex: Integer; virtual;
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function GetRecordCount: Integer; virtual;
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function GetRowCount: Integer; virtual;
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function GetDisplayText(ARecordIndex, AItemIndex: Integer): string; virtual;
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function GetValue(ARecordIndex, AItemIndex: Integer): Variant; virtual;
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procedure SetFocusedRowIndex(Value: Integer); virtual;
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procedure SetRecordCount(Value: Integer); virtual;
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procedure SetValue(ARecordIndex, AItemIndex: Integer; const Value: Variant); virtual;
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{ Inserting values }
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procedure StoreInsertingValues; virtual;
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procedure RestoreInsertingValues; virtual;
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function GetInsertingValue(Index: Integer): Variant;
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procedure SetInsertingValue(Index: Integer; Value: Variant);
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function InsertingValuesCount: Integer;
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{ Key field}
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function KeyField: TcxCustomWebDataField;
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function CheckKey(ARowIndex: Integer; AKey: string; ALevel: Integer): Boolean;
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function FindKey(AKey: string; ALevel: Integer): Integer;
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function RecordKeyValue(ARecord: Integer): string;
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function IsKeyNeeded(ARowIndex: Integer): Boolean;
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function IsDesigning: Boolean;
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property IsEditing: Boolean read FIsEditing write SetIsEditing;
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property IsInserting: Boolean read FIsInserting write SetIsInserting;
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public
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constructor Create(AOwner: TComponent); override;
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destructor Destroy; override;
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{ Data layout }
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function CheckRowIndex(ARowIndex: Integer): Boolean;
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function ItemHelperClass(AItemIndex: Integer): TcxDataFieldHelperClass; virtual;
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function FieldByName(const Name: string): TcxCustomWebDataField; virtual;
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function GetRowDisplayText(RowIndex: Integer; ItemIndex: Integer): string; virtual;
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function GetRowValue(RowIndex: Integer; ItemIndex: Integer): Variant; virtual;
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function GetRowExpanded(RowIndex: Integer): Boolean; virtual;
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function GetRowLevel(RowIndex: Integer): Integer; virtual;
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function GetRowRecord(RowIndex: Integer): Integer; virtual;
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function GetGroupingItemCount: Integer; virtual;
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function GetSortingItemCount: Integer; virtual;
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function GetItemGroupIndex(ItemIndex: Integer): Integer; virtual;
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function GetItemSortOrder(ItemIndex: Integer): TcxWebDataSortOrder; virtual;
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function GetGroupingItemIndex(Item: Integer): Integer; virtual;
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function GetSortingItemIndex(Item: Integer): Integer; virtual;
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procedure ClearGrouping; virtual;
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procedure ClearSorting; virtual;
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procedure FullCollapse; virtual;
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procedure FullExpand; virtual;
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property DisplayTexts[RecordIndex, ItemIndex: Integer]: string read GetDisplayText;
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property FocusedRowIndex: Integer read GetFocusedRowIndex write SetFocusedRowIndex;
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property RecordCount: Integer read GetRecordCount;
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property RowCount: Integer read GetRowCount;
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property Values[RecordIndex, ItemIndex: Integer]: Variant read GetValue write SetValue;
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{ Data clients }
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procedure RegisterClient(Client: TComponent);
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procedure UnRegisterClient(Client: TComponent);
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property ClientCount: Integer read GetClientCount;
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property Clients[Index: Integer]: TComponent read GetClient;
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{ Data operations }
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procedure CancelEdit; virtual;
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procedure DeleteRecord(ARowIndex: Integer); virtual;
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procedure InsertRecord(ARowIndex: Integer); virtual;
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procedure EditRecord(ARowIndex: Integer); virtual;
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procedure Expand(ARowIndex: Integer; AExpanded, ARecursive: Boolean); virtual;
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procedure Group(GroupField, GroupIndex: Integer); virtual;
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procedure PostEdit(APriorControlName: string); virtual;
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procedure SetEditValue(AItemIndex: Integer; AValue: Variant; AType: TcxWebDataTypes); virtual;
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procedure Sort(SortIndex: Integer; SortOrder: TcxWebDataSortOrder); virtual;
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procedure UnGroup(UnGroupIndex: Integer); virtual;
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procedure Refresh; virtual;
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property AllowExpanding: Boolean read GetAllowExpanding;
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property AllowGrouping: Boolean read GetAllowGrouping;
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property AllowSorting: Boolean read GetAllowSorting;
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property Fields: TcxCustomWebDataFields read GetFields write SetFields;
|
|
property FullName: string read GetFullName;
|
|
property State: TcxWebDataSourceState read GetState;
|
|
published
|
|
property AllowEditing: Boolean read GetAllowEditing write SetAllowEditing default True;
|
|
property KeyFieldName: string read GetKeyFieldName write SetKeyFieldName;
|
|
property LoadAllRecords: Boolean read FLoadAllRecords write FLoadAllRecords default False;
|
|
// Event properties
|
|
property OnAfterPost: TcxDataEvent read FOnAfterPost write FOnAfterPost;
|
|
property OnBeforePost: TcxAllowingDataEvent read FOnBeforePost write FOnBeforePost;
|
|
property OnCancelEdit: TcxDataEvent read FOnCancelEdit write FOnCancelEdit;
|
|
property OnDeleted: TcxDataEvent read FOnDeleted write FOnDeleted;
|
|
property OnDeleting: TcxAllowingDataEvent read FOnDeleting write FOnDeleting;
|
|
property OnInserted: TcxDataEvent read FOnInserted write FOnInserted;
|
|
property OnInserting: TcxAllowingDataEvent read FOnInserting write FOnInserting;
|
|
property OnScrolled: TcxDataEvent read FOnScrolled write FOnScrolled;
|
|
property OnScrolling: TcxAllowingDataEvent read FOnScrolling write FOnScrolling;
|
|
property OnSetInsertValue: TcxSetInsertValueEvent read FOnSetInsertValue write FOnSetInsertValue;
|
|
property OnSetEditValue: TcxSetEditValueEvent read FOnSetEditValue write FOnSetEditValue;
|
|
property OnStartEdit: TcxAllowingDataEvent read FOnStartEdit write FOnStartEdit;
|
|
end;
|
|
|
|
TcxCustomWebDataSourceRenderer = class(TcxWebComponentRenderer)
|
|
protected
|
|
function GetWebDataSource: TcxCustomWebDataSource; overload; virtual;
|
|
function IsLoadAllRecordsMode: Boolean; virtual;
|
|
|
|
procedure WriteData; virtual;
|
|
procedure WriteHandlers; virtual;
|
|
procedure WriteKeys; virtual;
|
|
public
|
|
class procedure GetScriptFiles(AList: TStrings); override;
|
|
procedure WriteHiddenFormElements; override;
|
|
procedure WriteScripts; override;
|
|
class procedure WriteClassScripts(AHTMLTextBuilder: TcxHTMLTextBuilder); override;
|
|
|
|
property WebDataSource: TcxCustomWebDataSource read GetWebDataSource;
|
|
end;
|
|
|
|
TcxCustomWebDataSourceNS4Renderer = class(TcxCustomWebDataSourceRenderer)
|
|
protected
|
|
function IsLoadAllRecordsMode: Boolean; override;
|
|
public
|
|
class function IsBrowserSupported(AWebBrowser: TcxWebBrowserClass): Boolean; override;
|
|
end;
|
|
|
|
TcxCustomWebDataSourceOperaRenderer = class(TcxCustomWebDataSourceNS4Renderer)
|
|
public
|
|
class function IsBrowserSupported(AWebBrowser: TcxWebBrowserClass): Boolean; override;
|
|
end;
|
|
|
|
TcxWebDataLink = class(TDataLink)
|
|
private
|
|
FWebDataSource: TcxCustomWebDataSource;
|
|
protected
|
|
procedure ActiveChanged; override;
|
|
procedure DataSetChanged; override;
|
|
public
|
|
property WebDataSource: TcxCustomWebDataSource read FWebDataSource;
|
|
end;
|
|
|
|
TcxStdWebDataSource = class(TcxCustomWebDataSource, IcxDataSetSupport)
|
|
private
|
|
FDataSource: TDataSource;
|
|
FDataLink: TcxWebDataLink;
|
|
protected
|
|
procedure Notification(AComponent: TComponent; Operation: TOperation); override;
|
|
|
|
function CanEdit: Boolean; override;
|
|
function GetItemField(AItemName: string): TField;
|
|
{ IcxDataSetSupport }
|
|
function GetDataSet: TDataSet;
|
|
procedure SetDataSet(Value: TDataSet);
|
|
{ fields }
|
|
function GetFields: TcxStdWebDataFields; reintroduce; overload;
|
|
procedure SetFields(Value: TcxStdWebDataFields);
|
|
{ values }
|
|
procedure DoSetValues; override;
|
|
procedure RegisterValues; override;
|
|
{ actions }
|
|
procedure RegisterActions; override;
|
|
{ renderes }
|
|
procedure RegisterRenderers; override;
|
|
{ values }
|
|
procedure SynchronizeSelection; override;
|
|
{ Data notification }
|
|
procedure DataNotification(AUpdateType: TcxUpdateType); override;
|
|
function NeedUpdateFields: Boolean; override;
|
|
procedure UpdateDefaultFields; override;
|
|
{ Data layout }
|
|
function GetFocusedRowIndex: Integer; override;
|
|
function GetDisplayText(ARecordIndex, AItemIndex: Integer): string; override;
|
|
function GetRecordCount: Integer; override;
|
|
function GetValue(ARecordIndex, AItemIndex: Integer): Variant; override;
|
|
procedure SetFocusedRowIndex(Value: Integer); override;
|
|
procedure SetValue(ARecordIndex, AItemIndex: Integer; const Value: Variant); override;
|
|
|
|
property DataSource: TDataSource read FDataSource;
|
|
public
|
|
constructor Create(AOwner: TComponent); override;
|
|
destructor Destroy; override;
|
|
{ Data operations }
|
|
procedure DeleteRecord(ARowIndex: Integer); override;
|
|
procedure InsertRecord(ARowIndex: Integer); override;
|
|
procedure EditRecord(ARowIndex: Integer); override;
|
|
procedure PostEdit(APriorControlName: string); override;
|
|
procedure SetEditValue(AItemIndex: Integer; AValue: Variant; AType: TcxWebDataTypes); override;
|
|
{ Data layout }
|
|
function ItemHelperClass(AItemIndex: Integer): TcxDataFieldHelperClass; override;
|
|
|
|
property Fields: TcxStdWebDataFields read GetFields write SetFields;
|
|
published
|
|
property DataSet: TDataSet read GetDataSet write SetDataSet;
|
|
end;
|
|
|
|
implementation
|
|
|
|
uses
|
|
DateUtils, StrUtils, Math, Variants,
|
|
cxWebDataCtrls, cxWebUtils, cxWebDataUtils, cxWebFileCacheManager,
|
|
cxWebStrs, cxWebConsts;
|
|
|
|
{ TcxAbstractWebDataBinding }
|
|
|
|
constructor TcxAbstractWebDataBinding.Create(AComponent: TComponent);
|
|
begin
|
|
inherited Create;
|
|
FComponent := AComponent;
|
|
end;
|
|
|
|
procedure TcxAbstractWebDataBinding.Assign(Source: TPersistent);
|
|
begin
|
|
if not (Source is TcxAbstractWebDataBinding) then
|
|
inherited;
|
|
end;
|
|
|
|
{ TcxCustomWebDataBinding }
|
|
|
|
destructor TcxCustomWebDataBinding.Destroy;
|
|
begin
|
|
DataSource := nil;
|
|
inherited Destroy;
|
|
end;
|
|
|
|
function TcxCustomWebDataBinding.GetFieldIndex: Integer;
|
|
begin
|
|
Result := -1;
|
|
end;
|
|
|
|
function TcxCustomWebDataBinding.GetFirstVisibleRow: Integer;
|
|
begin
|
|
Result := -1;
|
|
end;
|
|
|
|
function TcxCustomWebDataBinding.GetPageSize: Integer;
|
|
begin
|
|
Result := -1;
|
|
end;
|
|
|
|
procedure TcxCustomWebDataBinding.WriteControlScripts(HTMLTextBuilder: TcxHTMLTextBuilder;
|
|
AControlClass: string);
|
|
begin
|
|
HTMLTextBuilder.WriteText(Format('_DataControl = %s()', [AControlClass]));
|
|
HTMLTextBuilder.WriteText(Format(' _DataControl.Name = "%s";', [Component.Name]));
|
|
HTMLTextBuilder.WriteText(Format(' _DataControl.DataControllerName = "%s";',
|
|
[DataSource.FullName]));
|
|
HTMLTextBuilder.WriteText(Format(' _DataControl.FieldIndex = %d;', [GetFieldIndex]));
|
|
HTMLTextBuilder.WriteText(Format(' _DataControl.PageSize = %d;', [GetPageSize]));
|
|
HTMLTextBuilder.WriteText(Format(' _DataControl.FirstVisibleRow = %d;', [GetFirstVisibleRow]));
|
|
end;
|
|
|
|
function TcxCustomWebDataBinding.GetDataSource: TcxCustomWebDataSource;
|
|
begin
|
|
Result := FDataSource;
|
|
end;
|
|
|
|
procedure TcxCustomWebDataBinding.SetDataSource(Value: TcxCustomWebDataSource);
|
|
begin
|
|
if FDataSource <> Value then
|
|
begin
|
|
if (FDataSource <> nil) and not (csDestroying in FDataSource.ComponentState) then
|
|
begin
|
|
FDataSource.UnRegisterClient(Component);
|
|
FDataSource.RemoveFreeNotification(Component);
|
|
end;
|
|
FDataSource := Value;
|
|
if FDataSource <> nil then
|
|
begin
|
|
FDataSource.FreeNotification(Component);
|
|
FDataSource.RegisterClient(Component);
|
|
end;
|
|
if not (csDestroying in Component.ComponentState) then
|
|
ChangedDataLayout(FDataSource);
|
|
end;
|
|
end;
|
|
|
|
procedure TcxCustomWebDataBinding.ChangedDataLayout(Sender: TcxCustomWebDataSource);
|
|
begin
|
|
end;
|
|
|
|
procedure TcxCustomWebDataBinding.UpdateData(Sender: TcxCustomWebDataSource);
|
|
begin
|
|
end;
|
|
|
|
procedure TcxCustomWebDataBinding.Assign(Source: TPersistent);
|
|
begin
|
|
if Source is TcxCustomWebDataBinding then
|
|
DataSource := TcxCustomWebDataBinding(Source).DataSource
|
|
else inherited;
|
|
end;
|
|
|
|
procedure TcxCustomWebDataBinding.Loaded;
|
|
begin
|
|
if DataSource = nil then
|
|
ChangedDataLayout(DataSource);
|
|
end;
|
|
|
|
procedure TcxCustomWebDataBinding.Notification(AComponent: TComponent; Operation: TOperation);
|
|
begin
|
|
if (Operation = opRemove) and (AComponent = DataSource) then
|
|
DataSource := nil;
|
|
end;
|
|
|
|
{ TcxDataFieldHelper }
|
|
|
|
constructor TcxDataFieldHelper.Create(AField: TcxCustomWebDataField);
|
|
begin
|
|
FField := AField;
|
|
end;
|
|
|
|
function TcxDataFieldHelper.GetDataSource: TcxCustomWebDataSource;
|
|
begin
|
|
Result := Field.DataSource;
|
|
end;
|
|
|
|
function TcxDataFieldHelper.GetIndex: Integer;
|
|
begin
|
|
Result := Field.Index;
|
|
end;
|
|
|
|
function TcxDataFieldHelper.ValidateValue(var Value: Variant): Boolean;
|
|
begin
|
|
Result := True;
|
|
end;
|
|
|
|
function TcxDataFieldHelper.ValidateValueType(AType: TcxWebDataTypes): Boolean;
|
|
begin
|
|
Result := dtText in AType;
|
|
end;
|
|
|
|
function TcxDataFieldHelper.GetScriptData(ARecord: Integer): string;
|
|
begin
|
|
Result := '"Unknown format"';
|
|
end;
|
|
|
|
{ TcxStringFieldHelper }
|
|
|
|
function TcxStringFieldHelper.ValidateValue(var Value: Variant): Boolean;
|
|
begin
|
|
if VarIsType(Value, varString) then
|
|
Result := True
|
|
else Result := False;
|
|
end;
|
|
|
|
function TcxStringFieldHelper.GetScriptData(ARecord: Integer): string;
|
|
begin
|
|
Result := Format('["%s"]', [ScriptString(DataSource.DisplayTexts[ARecord, Index])]);
|
|
end;
|
|
|
|
{ TcxIntegerFieldHelper }
|
|
|
|
function TcxIntegerFieldHelper.ValidateValue(var Value: Variant): Boolean;
|
|
var
|
|
Dummy: Integer;
|
|
begin
|
|
if VarIsType(Value, [varInteger, varShortInt, varByte, varWord, varLongWord, varInt64]) then
|
|
Result := True
|
|
else if VarIsType(Value, varString) then
|
|
begin
|
|
if TryStrToInt(Value, Dummy) then
|
|
Result := True
|
|
else if Value = '' then
|
|
begin
|
|
Value := 0;
|
|
Result := True;
|
|
end
|
|
else Result := False;
|
|
end
|
|
else Result := False;
|
|
end;
|
|
|
|
function TcxIntegerFieldHelper.GetScriptData(ARecord: Integer): string;
|
|
begin
|
|
Result := Format('[%s]', [DataSource.DisplayTexts[ARecord, Index]]);
|
|
end;
|
|
|
|
{ TcxCurrencyFieldHelper }
|
|
|
|
function TcxCurrencyFieldHelper.ValidateValue(var Value: Variant): Boolean;
|
|
var
|
|
Dummy: Currency;
|
|
begin
|
|
if VarIsType(Value, [varDouble, varSingle, varCurrency]) then
|
|
Result := True
|
|
else if VarIsType(Value, varString) then
|
|
begin
|
|
if TryStrToCurr(Value, Dummy) then
|
|
Result := True
|
|
else if Value = '' then
|
|
begin
|
|
Value := 0;
|
|
Result := True;
|
|
end
|
|
else Result := False;
|
|
end
|
|
else Result := False;
|
|
end;
|
|
|
|
function TcxCurrencyFieldHelper.GetScriptData(ARecord: Integer): string;
|
|
begin
|
|
Result := Format('[%s, "%s"]', [ScriptValue(DataSource.Values[ARecord, Index]), DataSource.DisplayTexts[ARecord, Index]]);
|
|
end;
|
|
|
|
{ TcxFloatFieldHelper }
|
|
|
|
function TcxFloatFieldHelper.ValidateValue(var Value: Variant): Boolean;
|
|
var
|
|
Dummy: Double;
|
|
begin
|
|
if VarIsType(Value, [varDouble, varSingle, varCurrency]) then
|
|
Result := True
|
|
else if VarIsType(Value, varString) then
|
|
begin
|
|
if TryStrToFloat(Value, Dummy) then
|
|
Result := True
|
|
else if Value = '' then
|
|
begin
|
|
Value := 0;
|
|
Result := True;
|
|
end
|
|
else Result := False;
|
|
end
|
|
else Result := False;
|
|
end;
|
|
|
|
function TcxFloatFieldHelper.GetScriptData(ARecord: Integer): string;
|
|
var
|
|
SaveDecimalSeparator: Char;
|
|
Value: Variant;
|
|
begin
|
|
Value := DataSource.Values[ARecord, Index];
|
|
if VarIsType(Value, [varDouble, varSingle, varCurrency]) then
|
|
begin
|
|
SaveDecimalSeparator := DecimalSeparator;
|
|
try
|
|
DecimalSeparator := '.';
|
|
try
|
|
Result := Format('[eval("%g")]', [Extended(Value)])
|
|
except
|
|
Result := '[null]';
|
|
end
|
|
finally
|
|
DecimalSeparator := SaveDecimalSeparator;
|
|
end
|
|
end
|
|
else Result := '[null]';
|
|
end;
|
|
|
|
{ TcxDateTimeFieldHelper }
|
|
|
|
function TcxDateTimeFieldHelper.ValidateValue(var Value: Variant): Boolean;
|
|
var
|
|
Dummy: TDateTime;
|
|
begin
|
|
if VarIsType(Value, varDate) then
|
|
Result := True
|
|
else if VarIsType(Value, varString) then
|
|
begin
|
|
if TryStrToDateTime(Value, Dummy) then
|
|
Result := True
|
|
else if Value = '' then
|
|
begin
|
|
Value := 0;
|
|
Result := True;
|
|
end
|
|
else Result := False;
|
|
end
|
|
else Result := False;
|
|
end;
|
|
|
|
function TcxDateTimeFieldHelper.GetScriptData(ARecord: Integer): string;
|
|
var
|
|
Date: Variant;
|
|
AYear, AMonth, ADay, AHour, AMinute, ASecond, AMilliSecond: Word;
|
|
begin
|
|
Date := DataSource.Values[ARecord, Index];
|
|
if VarIsType(Date, varDate) then
|
|
begin
|
|
try
|
|
DecodeDateTime(TDateTime(Date), AYear, AMonth, ADay, AHour, AMinute, ASecond, AMilliSecond);
|
|
Result := Format('[new Date(%d, %d, %d, %d, %d), "%s"]',
|
|
[AYear, AMonth - 1, ADay, AHour, AMinute, DataSource.DisplayTexts[ARecord, Index]]);
|
|
except
|
|
Result := '[null]';
|
|
end;
|
|
end
|
|
else Result := '[null]';
|
|
end;
|
|
|
|
{ TcxBooleanFieldHelper }
|
|
|
|
function TcxBooleanFieldHelper.ValidateValue(var Value: Variant): Boolean;
|
|
var
|
|
Dummy: Boolean;
|
|
begin
|
|
if VarIsType(Value, varBoolean) then
|
|
Result := True
|
|
else if VarIsType(Value, varString) then
|
|
begin
|
|
if TryStrToBool(Value, Dummy) then
|
|
Result := True
|
|
else if Value = '' then
|
|
begin
|
|
Value := False;
|
|
Result := True;
|
|
end
|
|
else Result := False;
|
|
end
|
|
else Result := False;
|
|
end;
|
|
|
|
function TcxBooleanFieldHelper.GetScriptData(ARecord: Integer): string;
|
|
begin
|
|
Result := Format('[%s, "%s"]', [LowerCase(DataSource.DisplayTexts[ARecord, Index]), DataSource.DisplayTexts[ARecord, Index]]);
|
|
end;
|
|
|
|
{ TcxImageFieldHelper }
|
|
|
|
function TcxImageFieldHelper.ValidateValue(var Value: Variant): Boolean;
|
|
begin
|
|
Result := False;
|
|
end;
|
|
|
|
function TcxImageFieldHelper.ValidateValueType(AType: TcxWebDataTypes): Boolean;
|
|
begin
|
|
Result := dtValue in AType;
|
|
end;
|
|
|
|
function TcxImageFieldHelper.GetScriptData(ARecord: Integer): string;
|
|
begin
|
|
Result := '[null, "(GRAPHICS)"]';
|
|
end;
|
|
|
|
{ TcxMemoFieldHelper }
|
|
|
|
function TcxMemoFieldHelper.ValidateValue(var Value: Variant): Boolean;
|
|
begin
|
|
if VarIsType(Value, varString) then
|
|
Result := True
|
|
else Result := False;
|
|
end;
|
|
|
|
function TcxMemoFieldHelper.ValidateValueType(AType: TcxWebDataTypes): Boolean;
|
|
begin
|
|
Result := dtValue in AType;
|
|
end;
|
|
|
|
function TcxMemoFieldHelper.GetScriptData(ARecord: Integer): string;
|
|
begin
|
|
Result := Format('["%s", "(MEMO)"]', [ScriptValue(DataSource.Values[ARecord, Index])]);
|
|
end;
|
|
|
|
{ TcxBinaryFieldHelper }
|
|
|
|
function TcxBinaryFieldHelper.ValidateValue(var Value: Variant): Boolean;
|
|
begin
|
|
Result := False;
|
|
end;
|
|
|
|
function TcxBinaryFieldHelper.ValidateValueType(AType: TcxWebDataTypes): Boolean;
|
|
begin
|
|
Result := dtValue in AType;
|
|
end;
|
|
|
|
function TcxBinaryFieldHelper.GetScriptData(ARecord: Integer): string;
|
|
begin
|
|
Result := '[null, "(BINARY)"]';
|
|
end;
|
|
|
|
{ TcxCustomWebDataField }
|
|
|
|
constructor TcxCustomWebDataField.Create(Collection: TCollection);
|
|
begin
|
|
inherited;
|
|
FName := UniqueName;
|
|
end;
|
|
|
|
destructor TcxCustomWebDataField.Destroy;
|
|
begin
|
|
FreeAndNil(FFieldHelper);
|
|
inherited;
|
|
end;
|
|
|
|
function TcxCustomWebDataField.DataSource: TcxCustomWebDataSource;
|
|
begin
|
|
Result := Collection.Owner as TcxCustomWebDataSource;
|
|
end;
|
|
|
|
function TcxCustomWebDataField.GetScriptData(ARecord: Integer): string;
|
|
begin
|
|
Result := FieldHelper.GetScriptData(ARecord);
|
|
end;
|
|
|
|
function TcxCustomWebDataField.ValidateValue(var AValue: Variant): Boolean;
|
|
begin
|
|
Result := FieldHelper.ValidateValue(AValue);
|
|
end;
|
|
|
|
function TcxCustomWebDataField.ValidateValueType(AType: TcxWebDataTypes): Boolean;
|
|
begin
|
|
Result := FieldHelper.ValidateValueType(AType);
|
|
end;
|
|
|
|
procedure TcxCustomWebDataField.SetName(Value: string);
|
|
begin
|
|
if FName <> Value then
|
|
begin
|
|
if (DataSource <> nil) and (DataSource.FieldByName(Value) = nil) then
|
|
FName := Value;
|
|
end;
|
|
end;
|
|
|
|
function TcxCustomWebDataField.UniqueName: string;
|
|
var
|
|
I: Integer;
|
|
begin
|
|
if DataSource <> nil then
|
|
begin
|
|
I := 0;
|
|
while True do
|
|
begin
|
|
Result := 'dcfField' + IntToStr(I);
|
|
if DataSource.FieldByName(Result) = nil then
|
|
break
|
|
else Inc(I);
|
|
end;
|
|
end
|
|
else Result := 'dcfField' + IntToStr(Index);
|
|
end;
|
|
|
|
function TcxCustomWebDataField.FieldHelper: TcxDataFieldHelper;
|
|
var
|
|
HelperClass: TcxDataFieldHelperClass;
|
|
begin
|
|
if FFieldHelper = nil then
|
|
begin
|
|
HelperClass := DataSource.ItemHelperClass(Index);
|
|
if HelperClass <> nil then
|
|
FFieldHelper := HelperClass.Create(Self)
|
|
else FFieldHelper := TcxDataFieldHelper.Create(Self);
|
|
end;
|
|
Result := FFieldHelper;
|
|
end;
|
|
|
|
function TcxCustomWebDataField.GetDisplayName: string;
|
|
begin
|
|
Result := Name;
|
|
end;
|
|
|
|
{ TcxCustomWebDataFields }
|
|
|
|
constructor TcxCustomWebDataFields.Create(ADataSource: TcxCustomWebDataSource);
|
|
begin
|
|
inherited Create(FieldClass);
|
|
FDataSource := ADataSource;
|
|
end;
|
|
|
|
function TcxCustomWebDataFields.Add: TcxCustomWebDataField;
|
|
begin
|
|
Result := TcxCustomWebDataField(inherited Add);
|
|
end;
|
|
|
|
function TcxCustomWebDataFields.DataSource: TcxCustomWebDataSource;
|
|
begin
|
|
Result := FDataSource;
|
|
end;
|
|
|
|
function TcxCustomWebDataFields.GetItem(Index: Integer): TcxCustomWebDataField;
|
|
begin
|
|
Result := TcxCustomWebDataField(inherited Items[Index]);
|
|
end;
|
|
|
|
function TcxCustomWebDataFields.GetOwner: TPersistent;
|
|
begin
|
|
Result := FDataSource;
|
|
end;
|
|
|
|
class function TcxCustomWebDataFields.FieldClass: TcxCustomWebDataFieldClass;
|
|
begin
|
|
Result := TcxCustomWebDataField;
|
|
end;
|
|
|
|
procedure TcxCustomWebDataFields.SetItem(Index: Integer; Value: TcxCustomWebDataField);
|
|
begin
|
|
Items[Index].Assign(Value);
|
|
end;
|
|
|
|
{ TcxStdWebDataField }
|
|
|
|
function TcxStdWebDataField.DataSource: TcxStdWebDataSource;
|
|
begin
|
|
Result := Collection.Owner as TcxStdWebDataSource;
|
|
end;
|
|
|
|
function TcxStdWebDataField.GetDataSet: TDataSet;
|
|
begin
|
|
if (Collection as TcxStdWebDataFields).DataSource <> nil then
|
|
Result := (Collection as TcxStdWebDataFields).DataSource.DataSet
|
|
else Result := nil;
|
|
end;
|
|
|
|
procedure TcxStdWebDataField.SetFieldName(const Value: string);
|
|
begin
|
|
if FFieldName <> Value then
|
|
begin
|
|
FFieldName := Value;
|
|
end;
|
|
end;
|
|
|
|
{ TcxStdWebDataFields }
|
|
|
|
function TcxStdWebDataFields.GetItem(Index: Integer): TcxStdWebDataField;
|
|
begin
|
|
Result := TcxStdWebDataField(inherited Items[Index]);
|
|
end;
|
|
|
|
procedure TcxStdWebDataFields.SetItem(Index: Integer; Value: TcxStdWebDataField);
|
|
begin
|
|
Items[Index].Assign(Value);
|
|
end;
|
|
|
|
class function TcxStdWebDataFields.FieldClass: TcxCustomWebDataFieldClass;
|
|
begin
|
|
Result := TcxStdWebDataField;
|
|
end;
|
|
|
|
function TcxStdWebDataFields.Add: TcxStdWebDataField;
|
|
begin
|
|
Result := TcxStdWebDataField(inherited Add);
|
|
end;
|
|
|
|
function TcxStdWebDataFields.DataSource: TcxStdWebDataSource;
|
|
begin
|
|
Result := inherited DataSource as TcxStdWebDataSource;
|
|
end;
|
|
|
|
{ TcxWebDataSourceEventsHelper }
|
|
|
|
function TcxWebDataSourceEventsHelper.EventName(const AEvent: Integer): string;
|
|
const
|
|
cxHTMLEvent: array[TcxWebDataSourceEvent] of string = ('OnAfterSort', 'OnAfterGroup',
|
|
'OnAfterUngroup', 'OnAfterExpand', 'OnAfterMove', 'OnBeforeSort',
|
|
'OnBeforeGroup', 'OnBeforeUngroup', 'OnBeforeExpand', 'OnBeforeMove',
|
|
'OnBeforeDelete', 'OnBeforeInsert', 'OnBeforeStartEdit', 'OnBeforePostEdit',
|
|
'OnBeforeCancelEdit', 'OnBeforeRefresh');
|
|
begin
|
|
Result := cxHTMLEvent[TcxWebDataSourceEvent(AEvent)];
|
|
end;
|
|
|
|
function TcxWebDataSourceEventsHelper.EventProcParams(const AEvent: Integer): string;
|
|
const
|
|
cxHTMLEventProcParams: array[TcxWebDataSourceEvent] of string = ('(Sender, ColumnIndex)',
|
|
'(Sender, ColumnIndex, GroupIndex)', '(Sender, ColumnIndex)', '(Sender, RowIndex)',
|
|
'(Sender, RowIndex)', '(Sender, ColumnIndex)', '(Sender, ColumnIndex, GroupIndex)',
|
|
'(Sender, ColumnIndex)', '(Sender, RowIndex)', '(Sender, RowIndex)', '(Sender, RowIndex)',
|
|
'(Sender, RowIndex)', '(Sender, RowIndex)', '(Sender)', '(Sender)', '(Sender)');
|
|
begin
|
|
Result := cxHTMLEventProcParams[TcxWebDataSourceEvent(AEvent)];
|
|
end;
|
|
|
|
function TcxWebDataSourceEventsHelper.ScriptObject: string;
|
|
begin
|
|
Result := '_DataController';
|
|
end;
|
|
|
|
function TcxWebDataSourceEventsHelper.EventTypeInfo: PTypeInfo;
|
|
begin
|
|
Result := TypeInfo(TcxWebDataSourceEvent);
|
|
end;
|
|
|
|
{ TcxCustomWebDataSource }
|
|
|
|
constructor TcxCustomWebDataSource.Create(AOwner: TComponent);
|
|
begin
|
|
inherited;
|
|
FClientsList := TList.Create;
|
|
FAllowEditing := True;
|
|
end;
|
|
|
|
destructor TcxCustomWebDataSource.Destroy;
|
|
begin
|
|
FClientsList.Free;
|
|
inherited;
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.CheckRowIndex(ARowIndex: Integer): Boolean;
|
|
begin
|
|
Result := ((0 <= ARowIndex) and (ARowIndex < RowCount));
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.GetFocusedRowIndex: Integer;
|
|
begin
|
|
Result := -1;
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.ItemHelperClass(AItemIndex: Integer): TcxDataFieldHelperClass;
|
|
begin
|
|
Result := TcxDataFieldHelper;
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.GetValue(ARecordIndex, AItemIndex: Integer): Variant;
|
|
begin
|
|
Result := VarEmpty;
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.Loaded;
|
|
begin
|
|
inherited;
|
|
DataNotification(utData);
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.CanEdit: Boolean;
|
|
begin
|
|
Result := AllowEditing;
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.GetAllowEditing: Boolean;
|
|
begin
|
|
Result := FAllowEditing;
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.GetAllowExpanding: Boolean;
|
|
begin
|
|
Result := False;
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.GetAllowGrouping: Boolean;
|
|
begin
|
|
Result := False;
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.GetAllowSorting: Boolean;
|
|
begin
|
|
Result := False;
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.GetKeyFieldName: string;
|
|
begin
|
|
Result := FKeyFieldName;
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.SetAllowEditing(Value: Boolean);
|
|
begin
|
|
if FAllowEditing <> Value then
|
|
begin
|
|
FAllowEditing := Value;
|
|
if not Value then CancelEdit;
|
|
end;
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.SetIsEditing(Value: Boolean);
|
|
begin
|
|
if FIsEditing <> Value then
|
|
begin
|
|
FIsEditing := Value;
|
|
end;
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.SetIsInserting(Value: Boolean);
|
|
begin
|
|
if FIsInserting <> Value then
|
|
begin
|
|
FIsInserting := Value;
|
|
end;
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.SetKeyFieldName(Value: string);
|
|
begin
|
|
if FKeyFieldName <> Value then
|
|
begin
|
|
FKeyFieldName := Value;
|
|
end;
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.SetEditValue(AItemIndex: Integer; AValue: Variant; AType: TcxWebDataTypes);
|
|
begin
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.SetFocusedRowIndex(Value: Integer);
|
|
begin
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.SetRecordCount(Value: Integer);
|
|
begin
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.SetValue(ARecordIndex, AItemIndex: Integer; const Value: Variant);
|
|
begin
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.StoreInsertingValues;
|
|
var
|
|
I: Integer;
|
|
AValue: Variant;
|
|
ACanSet: Boolean;
|
|
begin
|
|
SetLength(FInsertingValues, Fields.Count);
|
|
for I := 0 to Fields.Count - 1 do
|
|
begin
|
|
AValue := Null;
|
|
ACanSet := True;
|
|
if(Assigned(OnSetInsertValue)) then
|
|
OnSetInsertValue(Self, I, FocusedRowIndex, AValue, ACanSet);
|
|
if not ACanSet then AValue := Null;
|
|
SetInsertingValue(I, AValue);
|
|
end;
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.RestoreInsertingValues;
|
|
var
|
|
I: Integer;
|
|
begin
|
|
if Fields.Count = InsertingValuesCount then
|
|
for I := 0 to Fields.Count - 1 do
|
|
if FInsertingValues[I] <> Null then
|
|
SetEditValue(I, FInsertingValues[I], [dtText, dtValue]);
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.GetInsertingValue(Index: Integer): Variant;
|
|
begin
|
|
Result := FInsertingValues[Index];
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.SetInsertingValue(Index: Integer; Value: Variant);
|
|
begin
|
|
FInsertingValues[Index] := Value;
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.InsertingValuesCount: Integer;
|
|
begin
|
|
Result := Length(FInsertingValues)
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.KeyField: TcxCustomWebDataField;
|
|
begin
|
|
Result := FieldByName(KeyFieldName);
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.CheckKey(ARowIndex: Integer; AKey: string; ALevel: Integer): Boolean;
|
|
begin
|
|
if not CheckRowIndex(ARowIndex) then
|
|
Result := False
|
|
else
|
|
begin
|
|
if KeyField <> nil then
|
|
Result := (AKey = DisplayTexts[GetRowRecord(ARowIndex), KeyField.Index]) and
|
|
(ALevel = GetRowLevel(ARowIndex))
|
|
else Result := True;
|
|
end;
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.FindKey(AKey: string; ALevel: Integer): Integer;
|
|
var
|
|
I: Integer;
|
|
begin
|
|
Result := -1;
|
|
if KeyField <> nil then
|
|
for I := 0 to RowCount - 1 do
|
|
if (AKey = DisplayTexts[GetRowRecord(I), KeyField.Index]) and (ALevel = GetRowLevel(I)) then
|
|
begin
|
|
Result := I;
|
|
break;
|
|
end;
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.RecordKeyValue(ARecord: Integer): string;
|
|
begin
|
|
if KeyField <> nil then
|
|
Result := DisplayTexts[ARecord, KeyField.Index]
|
|
else Result := '';
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.IsKeyNeeded(ARowIndex: Integer): Boolean;
|
|
var
|
|
I: Integer;
|
|
ViewIntf: IcxWebViewDataSupport;
|
|
begin
|
|
Result := False;
|
|
for I := 0 to ClientCount - 1 do
|
|
if Supports(Clients[I], IcxWebViewDataSupport, ViewIntf) then
|
|
if (ARowIndex >= ViewIntf.GetFirstVisibleRow) and
|
|
(ARowIndex < ViewIntf.GetFirstVisibleRow + ViewIntf.GetPageSize) then
|
|
begin
|
|
Result := True;
|
|
break;
|
|
end;
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.ClearGrouping;
|
|
begin
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.ClearSorting;
|
|
begin
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.FullCollapse;
|
|
begin
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.FullExpand;
|
|
begin
|
|
end;
|
|
|
|
|
|
procedure TcxCustomWebDataSource.WebDelete(const AParameters: TcxActionParameters);
|
|
var
|
|
ARowIndex, AKeyLevel: Integer;
|
|
AKeyValue: string;
|
|
begin
|
|
try
|
|
ARowIndex := StrToInt(GetActionParameter(AParameters.ParamString, 0));
|
|
AKeyValue := GetActionParameter(AParameters.ParamString, 1);
|
|
AKeyLevel := StrToInt(GetActionParameter(AParameters.ParamString, 2));
|
|
except
|
|
on EConvertError do
|
|
begin
|
|
ARowIndex := -1;
|
|
AKeyValue := '';
|
|
AKeyLevel := 0;
|
|
end
|
|
else raise;
|
|
end;
|
|
if not CheckKey(ARowIndex, AKeyValue, AKeyLevel) then
|
|
ARowIndex := FindKey(AKeyValue, AKeyLevel);
|
|
if CheckRowIndex(ARowIndex) then DeleteRecord(ARowIndex);
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.WebStartEdit(const AParameters: TcxActionParameters);
|
|
var
|
|
ARowIndex, AKeyLevel: Integer;
|
|
AKeyValue: string;
|
|
begin
|
|
try
|
|
ARowIndex := StrToInt(GetActionParameter(AParameters.ParamString, 0));
|
|
AKeyValue := GetActionParameter(AParameters.ParamString, 1);
|
|
AKeyLevel := StrToInt(GetActionParameter(AParameters.ParamString, 2));
|
|
except
|
|
on EConvertError do
|
|
begin
|
|
ARowIndex := -1;
|
|
AKeyValue := '';
|
|
AKeyLevel := 0;
|
|
end
|
|
else raise;
|
|
end;
|
|
if not CheckKey(ARowIndex, AKeyValue, AKeyLevel) then
|
|
ARowIndex := FindKey(AKeyValue, AKeyLevel);
|
|
if CheckRowIndex(ARowIndex) then EditRecord(ARowIndex);
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.WebPostEdit(const AParameters: TcxActionParameters);
|
|
var
|
|
ARowIndex, AKeyLevel: Integer;
|
|
ADataControlName, AKeyValue: string;
|
|
begin
|
|
try
|
|
AKeyValue := GetActionParameter(AParameters.ParamString, 1);
|
|
AKeyLevel := StrToInt(GetActionParameter(AParameters.ParamString, 2));
|
|
except
|
|
on EConvertError do
|
|
begin
|
|
AKeyValue := '';
|
|
AKeyLevel := 0;
|
|
end
|
|
else raise;
|
|
end;
|
|
ARowIndex := FocusedRowIndex;
|
|
if not CheckKey(ARowIndex, AKeyValue, AKeyLevel) then
|
|
ARowIndex := FindKey(AKeyValue, AKeyLevel);
|
|
if CheckRowIndex(ARowIndex) then
|
|
begin
|
|
ADataControlName := GetActionParameter(AParameters.ParamString, 0);
|
|
PostEdit(ADataControlName);
|
|
end;
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.WebCancelEdit(const AParameters: TcxActionParameters);
|
|
begin
|
|
CancelEdit;
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.WebInsert(const AParameters: TcxActionParameters);
|
|
var
|
|
ARowIndex, AKeyLevel: Integer;
|
|
AKeyValue: string;
|
|
begin
|
|
try
|
|
ARowIndex := StrToInt(GetActionParameter(AParameters.ParamString, 0));
|
|
AKeyValue := GetActionParameter(AParameters.ParamString, 1);
|
|
AKeyLevel := StrToInt(GetActionParameter(AParameters.ParamString, 2));
|
|
except
|
|
on EConvertError do
|
|
begin
|
|
ARowIndex := -1;
|
|
AKeyValue := '';
|
|
AKeyLevel := 0;
|
|
end
|
|
else raise;
|
|
end;
|
|
if not CheckKey(ARowIndex, AKeyValue, AKeyLevel) then
|
|
ARowIndex := FindKey(AKeyValue, AKeyLevel);
|
|
if CheckRowIndex(ARowIndex) then
|
|
InsertRecord(ARowIndex)
|
|
else InsertRecord(-1);
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.WebRefresh(const AParameters: TcxActionParameters);
|
|
begin
|
|
Refresh;
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.WebMoveTo(const AParameters: TcxActionParameters);
|
|
var
|
|
ARowIndex: Integer;
|
|
begin
|
|
try
|
|
ARowIndex := StrToInt(GetActionParameter(AParameters.ParamString, 0));
|
|
except
|
|
on EConvertError do ARowIndex := -1;
|
|
else raise;
|
|
end;
|
|
if ARowIndex < 0 then ARowIndex := 0;
|
|
if ARowIndex >= RowCount then ARowIndex := RowCount - 1;
|
|
FocusedRowIndex := ARowIndex;
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.WebMoveBy(const AParameters: TcxActionParameters);
|
|
var
|
|
ARowIndex, OldRowIndex, Delta: Integer;
|
|
begin
|
|
OldRowIndex := GetFocusedRowIndex;
|
|
try
|
|
Delta := StrToInt(GetActionParameter(AParameters.ParamString, 0));
|
|
except
|
|
on EConvertError do Delta := 0;
|
|
else raise;
|
|
end;
|
|
ARowIndex := OldRowIndex + Delta;
|
|
if ARowIndex < 0 then ARowIndex := 0;
|
|
if ARowIndex >= RowCount then ARowIndex := RowCount - 1;
|
|
FocusedRowIndex := ARowIndex;
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.SynchronizeSelection;
|
|
var
|
|
ARowIndex: Integer;
|
|
begin
|
|
try
|
|
ARowIndex := StrToInt(WebValuesHelper.Values.Values[FullName + 'FocusedRow']);
|
|
except
|
|
on EConvertError do ARowIndex := 0;
|
|
else raise;
|
|
end;
|
|
if (ARowIndex < 0) then ARowIndex := 0;
|
|
if (ARowIndex >= RowCount) then ARowIndex := RowCount - 1;
|
|
FocusedRowIndex := ARowIndex;
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.SynchronizeInsertingValues;
|
|
var
|
|
I, DelimiterPos: Integer;
|
|
S, AValue: string;
|
|
begin
|
|
S := WebValuesHelper.Values.Values[FullName + 'InsertingValues'];
|
|
SetLength(FInsertingValues, Fields.Count);
|
|
|
|
for I := 0 to InsertingValuesCount - 1 do
|
|
begin
|
|
FInsertingValues[I] := Null;
|
|
DelimiterPos := Pos(scxInfoDelimiter, S);
|
|
if DelimiterPos = 0 then break;
|
|
try
|
|
AValue := LeftStr(S, DelimiterPos - 1);
|
|
if AValue <> '' then FInsertingValues[I] := AValue;
|
|
except
|
|
on EConvertError do FInsertingValues[I] := Null;
|
|
else raise;
|
|
end;
|
|
S := RightStr(S, Length(S) - DelimiterPos);
|
|
end;
|
|
|
|
end;
|
|
|
|
{ Actions }
|
|
|
|
procedure TcxCustomWebDataSource.DoAfterPerformActions;
|
|
begin
|
|
if not IsEditing then
|
|
UpdateDataLayout;
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.RegisterActions;
|
|
begin
|
|
WebActionsHelper.RegisterAction(scxDeleteAction, WebDelete);
|
|
WebActionsHelper.RegisterAction(scxStartEditAction, WebStartEdit);
|
|
WebActionsHelper.RegisterAction(scxPostEditAction, WebPostEdit);
|
|
WebActionsHelper.RegisterAction(scxCancelEditAction, WebCancelEdit);
|
|
WebActionsHelper.RegisterAction(scxInsertAction, WebInsert);
|
|
WebActionsHelper.RegisterAction(scxRefreshAction, WebRefresh);
|
|
WebActionsHelper.RegisterAction(scxMoveToAction, WebMoveTo);
|
|
WebActionsHelper.RegisterAction(scxMoveByAction, WebMoveBy);
|
|
end;
|
|
|
|
{ events }
|
|
|
|
function TcxCustomWebDataSource.GetWebEventsHelper: TcxWebDataSourceEventsHelper;
|
|
begin
|
|
Result := inherited GetWebEventsHelper as TcxWebDataSourceEventsHelper;
|
|
end;
|
|
|
|
class function TcxCustomWebDataSource.GetWebEventsHelperClass: TcxWebEventsHelperClass;
|
|
begin
|
|
Result := TcxWebDataSourceEventsHelper;
|
|
end;
|
|
|
|
{ Values }
|
|
function TcxCustomWebDataSource.CanSetValues: Boolean;
|
|
begin
|
|
Result := True;
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.DoAfterSetValues;
|
|
begin
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.DoSetValues;
|
|
begin
|
|
IsEditing := SameText(WebValuesHelper.Values.Values[FullName + 'IsEditing'], 'true');
|
|
IsInserting := SameText(WebValuesHelper.Values.Values[FullName + 'IsInserting'], 'true');
|
|
if IsInserting then SynchronizeInsertingValues;
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.RegisterValues;
|
|
begin
|
|
WebValuesHelper.RegisterValue(FullName + 'IsEditing', cxWebUtils.BoolToStr(IsEditing));
|
|
WebValuesHelper.RegisterValue(FullName + 'IsInserting', cxWebUtils.BoolToStr(IsInserting));
|
|
WebValuesHelper.RegisterValue(FullName + 'InsertingValues', '');
|
|
WebValuesHelper.RegisterValue(FullName + 'FocusedRow', IntToStr(FocusedRowIndex));
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.RegisterRenderers;
|
|
begin
|
|
WebRenderHelper.RegisterRenderer(TcxCustomWebDataSourceRenderer);
|
|
WebRenderHelper.RegisterRenderer(TcxCustomWebDataSourceNS4Renderer);
|
|
WebRenderHelper.RegisterRenderer(TcxCustomWebDataSourceOperaRenderer);
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.GetRowDisplayText(RowIndex: Integer; ItemIndex: Integer): string;
|
|
begin
|
|
Result := DisplayTexts[RowIndex, ItemIndex];
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.GetRowValue(RowIndex: Integer; ItemIndex: Integer): Variant;
|
|
begin
|
|
Result := Values[RowIndex, ItemIndex];
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.GetRowExpanded(RowIndex: Integer): Boolean;
|
|
begin
|
|
Result := False;
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.GetRowLevel(RowIndex: Integer): Integer;
|
|
begin
|
|
Result := 0;
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.GetRowRecord(RowIndex: Integer): Integer;
|
|
begin
|
|
Result := RowIndex;
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.GetGroupingItemCount: Integer;
|
|
begin
|
|
Result := 0;
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.GetSortingItemCount: Integer;
|
|
begin
|
|
Result := 0;
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.GetItemGroupIndex(ItemIndex: Integer): Integer;
|
|
begin
|
|
Result := -1;
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.GetItemSortOrder(ItemIndex: Integer): TcxWebDataSortOrder;
|
|
begin
|
|
Result := wsoNone;
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.GetGroupingItemIndex(Item: Integer): Integer;
|
|
begin
|
|
Result := -1;
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.GetSortingItemIndex(Item: Integer): Integer;
|
|
begin
|
|
Result := -1;
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.BeginUpdate;
|
|
begin
|
|
Inc(FUpdateLock);
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.CancelUpdate;
|
|
begin
|
|
Dec(FUpdateLock);
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.EndUpdate;
|
|
begin
|
|
Dec(FUpdateLock);
|
|
if FUpdateLock = 0 then
|
|
UpdateDataLayout;
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.FieldByName(const Name: string): TcxCustomWebDataField;
|
|
var
|
|
I: Integer;
|
|
begin
|
|
Result := nil;
|
|
for I := 0 to Fields.Count - 1 do
|
|
if SameText(Fields[I].Name, Name) then
|
|
begin
|
|
Result := Fields[I];
|
|
break;
|
|
end;
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.RegisterClient(Client: TComponent);
|
|
begin
|
|
if FClientsList.IndexOf(Client) = -1 then
|
|
FClientsList.Add(Client);
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.UnRegisterClient(Client: TComponent);
|
|
begin
|
|
if FClientsList.IndexOf(Client) <> -1 then
|
|
FClientsList.Remove(Client);
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.GetClient(Index: Integer): TComponent;
|
|
begin
|
|
Result := TComponent(FClientsList.Items[Index]);
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.GetClientCount: Integer;
|
|
begin
|
|
Result := FClientsList.Count;
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.GetFullName: string;
|
|
begin
|
|
Result := Format('%s_%s', [Owner.Name, Name]);
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.GetState: TcxWebDataSourceState;
|
|
begin
|
|
if IsInserting then
|
|
Result := inserting
|
|
else if IsEditing then
|
|
Result := editing
|
|
else Result := browsing;
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.DataNotification(AUpdateType: TcxUpdateType);
|
|
begin
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.NeedUpdateFields: Boolean;
|
|
begin
|
|
Result := False;
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.UpdateDefaultFields;
|
|
begin
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.UpdateDataLayout;
|
|
var
|
|
I: Integer;
|
|
DataSourceIntf: IcxWebDataSourceSupport;
|
|
begin
|
|
if FUpdateLock > 0 then exit;
|
|
BeginUpdate;
|
|
try
|
|
for I := 0 to ClientCount - 1 do
|
|
begin
|
|
if (Clients[I] <> nil) and not (csDestroying in Clients[I].ComponentState) then
|
|
begin
|
|
if Supports(Clients[I], IcxWebDataSourceSupport, DataSourceIntf) then
|
|
DataSourceIntf.ChangedDataLayout(Self);
|
|
end;
|
|
end;
|
|
finally
|
|
CancelUpdate;
|
|
end;
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.ChangedData(AClientName: string);
|
|
var
|
|
I: Integer;
|
|
DataSourceIntf: IcxWebDataSourceSupport;
|
|
begin
|
|
if IsLoading then exit;
|
|
BeginUpdate;
|
|
try
|
|
for I := 0 to ClientCount - 1 do
|
|
begin
|
|
if Supports(Clients[I], IcxWebDataSourceSupport, DataSourceIntf) then
|
|
DataSourceIntf.UpdateData(Self);
|
|
if Clients[I].Name = AClientName then break;
|
|
end;
|
|
finally
|
|
EndUpdate;
|
|
end;
|
|
end;
|
|
|
|
{ Data operations }
|
|
procedure TcxCustomWebDataSource.CancelEdit;
|
|
begin
|
|
BeginUpdate;
|
|
try
|
|
IsInserting := False;
|
|
IsEditing := False;
|
|
if Assigned(OnCancelEdit) then
|
|
OnCancelEdit(self, FocusedRowIndex);
|
|
finally
|
|
EndUpdate;
|
|
end;
|
|
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.DeleteRecord(ARowIndex: Integer);
|
|
begin
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.InsertRecord(ARowIndex: Integer);
|
|
begin
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.EditRecord(ARowIndex: Integer);
|
|
begin
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.Expand(ARowIndex: Integer; AExpanded, ARecursive: Boolean);
|
|
begin
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.Group(GroupField, GroupIndex: Integer);
|
|
begin
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.PostEdit(APriorControlName: string);
|
|
begin
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.Sort(SortIndex: Integer; SortOrder: TcxWebDataSortOrder);
|
|
begin
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.UnGroup(UnGroupIndex: Integer);
|
|
begin
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.Refresh;
|
|
begin
|
|
UpdateDataLayout;
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.GetFields: TcxCustomWebDataFields;
|
|
begin
|
|
Result := FFields;
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSource.SetFields(Value: TcxCustomWebDataFields);
|
|
begin
|
|
FFields := Value;
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.GetDisplayText(ARecordIndex, AItemIndex: Integer): string;
|
|
begin
|
|
Result := '';
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.GetRecordCount: Integer;
|
|
begin
|
|
Result := 0;
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.GetRowCount: Integer;
|
|
begin
|
|
Result := RecordCount;
|
|
end;
|
|
|
|
function TcxCustomWebDataSource.IsDesigning: Boolean;
|
|
begin
|
|
Result := (csDesigning in ComponentState) or ((Owner <> nil) and
|
|
(csDesigning in Owner.ComponentState));
|
|
end;
|
|
|
|
{ TcxCustomWebDataSourceRenderer }
|
|
|
|
function TcxCustomWebDataSourceRenderer.GetWebDataSource: TcxCustomWebDataSource;
|
|
begin
|
|
Result := Component as TcxCustomWebDataSource;
|
|
end;
|
|
|
|
function TcxCustomWebDataSourceRenderer.IsLoadAllRecordsMode: Boolean;
|
|
begin
|
|
Result := WebDataSource.LoadAllRecords and not WebDataSource.IsDesigning and
|
|
not WebDataSource.IsInserting;
|
|
end;
|
|
|
|
class procedure TcxCustomWebDataSourceRenderer.GetScriptFiles(AList: TStrings);
|
|
begin
|
|
AList.Add(scxCommonScriptName);
|
|
AList.Add(scxDataEngineScriptName);
|
|
AList.Add(scxDataControllerScriptName);
|
|
AList.Add(scxDataControlsScriptName);
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSourceRenderer.WriteHandlers;
|
|
begin
|
|
HTMLTextBuilder.WriteText(Format(' _DataController.AssignOnChangeFocus = %s;',
|
|
[cxWebUtils.BoolToStr(Assigned(WebDataSource.OnScrolling) or Assigned(WebDataSource.OnScrolled))]));
|
|
HTMLTextBuilder.WriteText(' _DataController.AssignOnGroup = false;');
|
|
HTMLTextBuilder.WriteText(' _DataController.AssignOnUnGroup = false;');
|
|
HTMLTextBuilder.WriteText(' _DataController.AssignOnSort = false;');
|
|
HTMLTextBuilder.WriteText(' _DataController.AssignOnExpand = false;');
|
|
HTMLTextBuilder.WriteText(Format(' _DataController.AssignOnEdit = %s;',
|
|
[cxWebUtils.BoolToStr(Assigned(WebDataSource.OnStartEdit))]));
|
|
HTMLTextBuilder.WriteText(Format(' _DataController.AssignOnCancelEdit = %s;',
|
|
[cxWebUtils.BoolToStr(Assigned(WebDataSource.OnCancelEdit))]));
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSourceRenderer.WriteKeys;
|
|
var
|
|
I, ARecordIndex: Integer;
|
|
begin
|
|
if not WebDataSource.IsDesigning and not IsLoadAllRecordsMode and
|
|
(WebDataSource.KeyField <> nil) then
|
|
begin
|
|
for I := 0 to WebDataSource.RowCount - 1 do
|
|
if WebDataSource.IsKeyNeeded(I) then
|
|
begin
|
|
ARecordIndex := WebDataSource.GetRowRecord(I);
|
|
HTMLTextBuilder.WriteText(Format(' _DataController.AddKey(%d, "%s", %d);',
|
|
[I, WebDataSource.RecordKeyValue(ARecordIndex), WebDataSource.GetRowLevel(I)]));
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSourceRenderer.WriteData;
|
|
var
|
|
I, J: Integer;
|
|
S: string;
|
|
begin
|
|
if IsLoadAllRecordsMode then
|
|
begin
|
|
for I := 0 to WebDataSource.RecordCount - 1 do
|
|
begin
|
|
S := '';
|
|
for J := 0 to WebDataSource.Fields.Count - 1 do
|
|
begin
|
|
S := S + WebDataSource.Fields[J].GetScriptData(I);
|
|
if J <> WebDataSource.Fields.Count - 1 then S := S + ', ';
|
|
end;
|
|
HTMLTextBuilder.WriteText(Format(' _DataController.AddRecord("%s", [%s]);',
|
|
[WebDataSource.RecordKeyValue(I), S]));
|
|
end;
|
|
end
|
|
else
|
|
begin
|
|
HTMLTextBuilder.WriteText(Format(' _DataController.RowCount = %d;', [WebDataSource.RowCount]));
|
|
HTMLTextBuilder.WriteText(Format(' _DataController.SortingItemCount = %d;', [WebDataSource.GetSortingItemCount]));
|
|
HTMLTextBuilder.WriteText(Format(' _DataController.GroupingItemCount = %d;', [WebDataSource.GetGroupingItemCount]));
|
|
WriteKeys;
|
|
end;
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSourceRenderer.WriteHiddenFormElements;
|
|
var
|
|
I: Integer;
|
|
S: string;
|
|
begin
|
|
WriteHiddenField(WebDataSource.FullName + 'FocusedRow', IntToStr(WebDataSource.FocusedRowIndex));
|
|
WriteHiddenField(WebDataSource.FullName + 'IsEditing', cxWebUtils.BoolToStr(WebDataSource.IsEditing));
|
|
WriteHiddenField(WebDataSource.FullName + 'IsInserting', cxWebUtils.BoolToStr(WebDataSource.IsInserting));
|
|
if WebDataSource.IsInserting then
|
|
begin
|
|
S := '';
|
|
for I := 0 to WebDataSource.InsertingValuesCount - 1 do
|
|
S := S + VarToStr(WebDataSource.GetInsertingValue(I)) + scxInfoDelimiter;
|
|
WriteHiddenField(WebDataSource.FullName + 'InsertingValues', S);
|
|
end;
|
|
end;
|
|
|
|
procedure TcxCustomWebDataSourceRenderer.WriteScripts;
|
|
begin
|
|
WriteEventsScript;
|
|
HTMLTextBuilder.WriteText(Format('_DataController = CreateDataController();', []));
|
|
HTMLTextBuilder.WriteText(Format(' _DataController.Name = "%s";', [WebDataSource.FullName]));
|
|
HTMLTextBuilder.WriteText(Format(' _DataController.ItemCount = %d;', [WebDataSource.Fields.Count]));
|
|
HTMLTextBuilder.WriteText(Format(' _DataController.AllowEditing = %s;',
|
|
[cxWebUtils.BoolToStr(WebDataSource.AllowEditing)]));
|
|
HTMLTextBuilder.WriteText(Format(' _DataController.AllowGrouping = %s;',
|
|
[cxWebUtils.BoolToStr(WebDataSource.AllowGrouping)]));
|
|
HTMLTextBuilder.WriteText(Format(' _DataController.AllowSorting = %s;',
|
|
[cxWebUtils.BoolToStr(WebDataSource.AllowSorting)]));
|
|
HTMLTextBuilder.WriteText(Format(' _DataController.AllowExpanding = %s;',
|
|
[cxWebUtils.BoolToStr(WebDataSource.AllowExpanding)]));
|
|
HTMLTextBuilder.WriteText(Format(' _DataController.LoadAllRecords = %s;',
|
|
[cxWebUtils.BoolToStr(IsLoadAllRecordsMode)]));
|
|
WriteEvents;
|
|
WriteData;
|
|
WriteHandlers;
|
|
end;
|
|
|
|
class procedure TcxCustomWebDataSourceRenderer.WriteClassScripts(AHTMLTextBuilder: TcxHTMLTextBuilder);
|
|
begin
|
|
AHTMLTextBuilder.WriteText(Format('var scxDeleteConfirmText = "%s";', [scxDeleteConfirmText]));
|
|
end;
|
|
|
|
{ TcxCustomWebDataSourceNS4Renderer }
|
|
class function TcxCustomWebDataSourceNS4Renderer.IsBrowserSupported(AWebBrowser: TcxWebBrowserClass): Boolean;
|
|
begin
|
|
Result := AWebBrowser = TcxWebBrowserNS4;
|
|
end;
|
|
|
|
function TcxCustomWebDataSourceNS4Renderer.IsLoadAllRecordsMode: Boolean;
|
|
begin
|
|
Result := False;
|
|
end;
|
|
|
|
{ TcxCustomWebDataSourceOperaRenderer }
|
|
|
|
class function TcxCustomWebDataSourceOperaRenderer.IsBrowserSupported(AWebBrowser: TcxWebBrowserClass): Boolean;
|
|
begin
|
|
Result := AWebBrowser = TcxWebBrowserOpera;
|
|
end;
|
|
|
|
{ TcxStdDataLink }
|
|
|
|
procedure TcxWebDataLink.ActiveChanged;
|
|
begin
|
|
if WebDataSource <> nil then
|
|
WebDataSource.DataNotification(utLayout);
|
|
end;
|
|
|
|
procedure TcxWebDataLink.DataSetChanged;
|
|
begin
|
|
if WebDataSource <> nil then
|
|
WebDataSource.DataNotification(utData);
|
|
end;
|
|
|
|
{ TcxStdWebDataSource }
|
|
|
|
constructor TcxStdWebDataSource.Create(AOwner: TComponent);
|
|
begin
|
|
inherited;
|
|
Fields := TcxStdWebDataFields.Create(Self);
|
|
FDataSource := TDataSource.Create(nil);
|
|
FDataLink := TcxWebDataLink.Create;
|
|
FDataLink.FWebDataSource := Self;
|
|
FDataLink.DataSource := FDataSource;
|
|
end;
|
|
|
|
destructor TcxStdWebDataSource.Destroy;
|
|
begin
|
|
FDataSource.Free;
|
|
FDataLink.Free;
|
|
if Fields <> nil then Fields.Clear;
|
|
Fields.Free;
|
|
inherited;
|
|
end;
|
|
|
|
procedure TcxStdWebDataSource.Notification(AComponent: TComponent; Operation: TOperation);
|
|
begin
|
|
inherited;
|
|
if csDestroying in ComponentState then exit;
|
|
if (Operation = opRemove) and (AComponent = DataSet) then
|
|
DataSet := nil;
|
|
end;
|
|
|
|
function TcxStdWebDataSource.GetDataSet: TDataSet;
|
|
begin
|
|
Result := DataSource.DataSet;
|
|
end;
|
|
|
|
type
|
|
TDataSetAccess = class(TDataSet);
|
|
|
|
function TcxStdWebDataSource.CanEdit: Boolean;
|
|
begin
|
|
Result := AllowEditing and (DataSource.DataSet <> nil) and
|
|
DataSource.DataSet.Active and TDataSetAccess(DataSource.DataSet).CanModify;
|
|
end;
|
|
|
|
function TcxStdWebDataSource.GetItemField(AItemName: string): TField;
|
|
var
|
|
AFieldName: string;
|
|
begin
|
|
AFieldName := FieldByName(AItemName).Name;
|
|
Result := DataSource.DataSet.FieldByName(AFieldName);
|
|
end;
|
|
|
|
function TcxStdWebDataSource.GetFields: TcxStdWebDataFields;
|
|
begin
|
|
Result := inherited GetFields as TcxStdWebDataFields;
|
|
end;
|
|
|
|
procedure TcxStdWebDataSource.SetDataSet(Value: TDataSet);
|
|
begin
|
|
if DataSource.DataSet <> Value then
|
|
begin
|
|
Fields.Clear;
|
|
DataSource.DataSet := Value;
|
|
if (Value <> nil) and Value.Active then
|
|
DataNotification(utLayout);
|
|
end;
|
|
end;
|
|
|
|
procedure TcxStdWebDataSource.SetFields(Value: TcxStdWebDataFields);
|
|
begin
|
|
inherited SetFields(Value);
|
|
end;
|
|
|
|
{ values }
|
|
procedure TcxStdWebDataSource.DoSetValues;
|
|
begin
|
|
BeginUpdate;
|
|
try
|
|
SynchronizeSelection;
|
|
inherited DoSetValues;
|
|
finally
|
|
CancelUpdate;
|
|
end;
|
|
end;
|
|
|
|
procedure TcxStdWebDataSource.RegisterValues;
|
|
begin
|
|
inherited;
|
|
end;
|
|
|
|
{ actions }
|
|
procedure TcxStdWebDataSource.RegisterActions;
|
|
begin
|
|
inherited;
|
|
WebActionsHelper.RegisterAction(scxDeleteAction, WebDelete);
|
|
WebActionsHelper.RegisterAction(scxStartEditAction, WebStartEdit);
|
|
WebActionsHelper.RegisterAction(scxPostEditAction, WebPostEdit);
|
|
WebActionsHelper.RegisterAction(scxCancelEditAction, WebCancelEdit);
|
|
WebActionsHelper.RegisterAction(scxInsertAction, WebInsert);
|
|
WebActionsHelper.RegisterAction(scxRefreshAction, WebRefresh);
|
|
WebActionsHelper.RegisterAction(scxMoveToAction, WebMoveTo);
|
|
WebActionsHelper.RegisterAction(scxMoveByAction, WebMoveBy);
|
|
end;
|
|
|
|
procedure TcxStdWebDataSource.RegisterRenderers;
|
|
begin
|
|
WebRenderHelper.RegisterRenderer(TcxCustomWebDataSourceRenderer);
|
|
WebRenderHelper.RegisterRenderer(TcxCustomWebDataSourceNS4Renderer);
|
|
end;
|
|
|
|
procedure TcxStdWebDataSource.SynchronizeSelection;
|
|
var
|
|
RowIndex: Integer;
|
|
begin
|
|
try
|
|
RowIndex := StrToInt(WebValuesHelper.Values.Values[FullName + 'FocusedRow']);
|
|
except
|
|
on EConvertError do RowIndex := 0;
|
|
else raise;
|
|
end;
|
|
if RowIndex < 0 then RowIndex := 0;
|
|
if (DataSet <> nil) and (DataSet.Active) then
|
|
begin
|
|
if RowIndex >= DataSet.RecordCount then
|
|
RowIndex := DataSet.RecordCount - 1;
|
|
DataSet.MoveBy(RowIndex - DataSet.RecNo + 1);
|
|
end;
|
|
end;
|
|
|
|
procedure TcxStdWebDataSource.DataNotification(AUpdateType: TcxUpdateType);
|
|
begin
|
|
if csDestroying in ComponentState then exit;
|
|
if AUpdateType = utLayout then
|
|
UpdateDefaultFields;
|
|
UpdateDataLayout;
|
|
end;
|
|
|
|
function TcxStdWebDataSource.NeedUpdateFields: Boolean;
|
|
var
|
|
I: Integer;
|
|
begin
|
|
if DataSet = nil then
|
|
begin
|
|
if Fields.Count > 0 then Result := True
|
|
else Result := False;
|
|
end
|
|
else if (DataSet.FieldCount = 0) and (DataSet.FieldDefs.Count <> Fields.Count) then
|
|
Result := True
|
|
else if DataSet.FieldCount = Fields.Count then
|
|
begin
|
|
Result := False;
|
|
for I := 0 to Fields.Count - 1 do
|
|
if DataSet.FindField(Fields[I].FieldName) = nil then
|
|
begin
|
|
Result := True;
|
|
break;
|
|
end;
|
|
end
|
|
else Result := True;
|
|
end;
|
|
|
|
procedure TcxStdWebDataSource.UpdateDefaultFields;
|
|
var
|
|
I: Integer;
|
|
AField: TField;
|
|
begin
|
|
if Fields = nil then exit;
|
|
if UpdateLock > 0 then exit;
|
|
|
|
if (DataSet <> nil) and (csDesigning in DataSet.ComponentState) and
|
|
not (csLoading in DataSet.ComponentState) and not DataSet.Active and
|
|
(DataSet.FieldDefs.Count = 0) then
|
|
TDataSetAccess(DataSet).InitFieldDefs;
|
|
|
|
BeginUpdate;
|
|
try
|
|
if DataSet <> nil then
|
|
begin
|
|
if NeedUpdateFields then
|
|
begin
|
|
Fields.Clear;
|
|
|
|
if DataSet.Fields.Count > 0 then
|
|
for I := 0 to DataSet.FieldCount - 1 do
|
|
begin
|
|
AField := DataSet.Fields[I];
|
|
with Fields.Add do
|
|
begin
|
|
Name := AField.FieldName;
|
|
FieldName := AField.FieldName;
|
|
DisplayLabel := AField.DisplayLabel;
|
|
end;
|
|
end
|
|
else for I := 0 to DataSet.FieldDefs.Count - 1 do
|
|
begin
|
|
with Fields.Add do
|
|
begin
|
|
Name := DataSet.FieldDefs[I].Name;
|
|
FieldName := DataSet.FieldDefs[I].Name;
|
|
DisplayLabel := DataSet.FieldDefs[I].DisplayName;
|
|
end;
|
|
end;
|
|
end;
|
|
end
|
|
else Fields.Clear;
|
|
finally
|
|
CancelUpdate;
|
|
end;
|
|
end;
|
|
|
|
procedure TcxStdWebDataSource.DeleteRecord(ARowIndex: Integer);
|
|
var
|
|
Processed: Boolean;
|
|
begin
|
|
if IsEditing then CancelEdit;
|
|
if AllowEditing then
|
|
begin
|
|
BeginUpdate;
|
|
try
|
|
Processed := True;
|
|
if Assigned(FOnDeleting) then
|
|
FOnDeleting(self, ARowIndex, Processed);
|
|
if Processed and CanEdit then
|
|
begin
|
|
DataSet.MoveBy(ARowIndex - DataSet.RecNo + 1);
|
|
DataSet.Delete;
|
|
if Assigned(FOnDeleted) then
|
|
FOnDeleted(self, ARowIndex);
|
|
end;
|
|
finally
|
|
EndUpdate;
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
procedure TcxStdWebDataSource.InsertRecord(ARowIndex: Integer);
|
|
var
|
|
Processed: Boolean;
|
|
begin
|
|
if IsEditing then CancelEdit;
|
|
if AllowEditing then
|
|
begin
|
|
BeginUpdate;
|
|
try
|
|
Processed := True;
|
|
if Assigned(FOnInserting) then
|
|
FOnInserting(self, ARowIndex, Processed);
|
|
if Processed and CanEdit then
|
|
begin
|
|
if not CheckRowIndex(ARowIndex) then
|
|
DataSet.MoveBy(RowCount - DataSet.RecNo);
|
|
StoreInsertingValues;
|
|
IsInserting := True;
|
|
IsEditing := True;
|
|
if Assigned(FOnInserted) then
|
|
FOnInserted(self, ARowIndex);
|
|
end;
|
|
finally
|
|
EndUpdate;
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
procedure TcxStdWebDataSource.EditRecord(ARowIndex: Integer);
|
|
var
|
|
Processed: Boolean;
|
|
begin
|
|
if AllowEditing then
|
|
begin
|
|
BeginUpdate;
|
|
try
|
|
Processed := True;
|
|
if Assigned(OnStartEdit) then
|
|
OnStartEdit(Self, ARowIndex, Processed);
|
|
if Processed and CanEdit then
|
|
begin
|
|
DataSet.MoveBy(ARowIndex - DataSet.RecNo + 1);
|
|
IsEditing := True;
|
|
end;
|
|
finally
|
|
EndUpdate;
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
procedure TcxStdWebDataSource.PostEdit(APriorControlName: string);
|
|
var
|
|
Processed: Boolean;
|
|
SavedIsInserting: Boolean;
|
|
begin
|
|
if AllowEditing then
|
|
begin
|
|
BeginUpdate;
|
|
try
|
|
Processed := True;
|
|
if Assigned(FOnBeforePost) then
|
|
FOnBeforePost(self, FocusedRowIndex, Processed);
|
|
if Processed and CanEdit then
|
|
begin
|
|
SavedIsInserting := IsInserting;
|
|
if IsInserting then
|
|
begin
|
|
ChangedData(APriorControlName);
|
|
DataSet.Insert;
|
|
IsInserting := False;
|
|
RestoreInsertingValues;
|
|
end
|
|
else
|
|
begin
|
|
DataSet.Edit;
|
|
ChangedData(APriorControlName);
|
|
end;
|
|
try
|
|
DataSet.Post;
|
|
except
|
|
if SavedIsInserting then IsInserting := True;
|
|
raise;
|
|
end;
|
|
IsEditing := False;
|
|
if Assigned(FOnAfterPost) then
|
|
FOnAfterPost(self, FocusedRowIndex);
|
|
end;
|
|
finally
|
|
EndUpdate;
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
function TcxStdWebDataSource.GetFocusedRowIndex: Integer;
|
|
begin
|
|
if (DataSet = nil) or (not DataSet.Active) then
|
|
Result := -1
|
|
else
|
|
begin
|
|
Result := DataSet.RecNo - 1;
|
|
if (DataSet.State = dsInsert) and (Result < 0) then Result := 0;
|
|
end;
|
|
end;
|
|
|
|
function TcxStdWebDataSource.ItemHelperClass(AItemIndex: Integer): TcxDataFieldHelperClass;
|
|
var
|
|
AField: TField;
|
|
begin
|
|
Result := TcxDataFieldHelper;
|
|
AField := DataSet.Fields.FieldByName(Fields[AItemIndex].FieldName);
|
|
if AField <> nil then
|
|
begin
|
|
case AField.DataType of
|
|
ftString, ftWideString:
|
|
Result := TcxStringFieldHelper;
|
|
ftSmallint, ftInteger,
|
|
ftAutoInc, ftWord,
|
|
ftLargeint:
|
|
Result := TcxIntegerFieldHelper;
|
|
ftBCD:
|
|
if (AField as TBCDField).currency then
|
|
Result := TcxCurrencyFieldHelper
|
|
else
|
|
Result := TcxIntegerFieldHelper;
|
|
ftFMTBcd:
|
|
if (AField as TFMTBCDField).currency then
|
|
Result := TcxCurrencyFieldHelper
|
|
else
|
|
Result := TcxIntegerFieldHelper;
|
|
ftCurrency, ftFloat:
|
|
if (AField as TFloatField).currency then
|
|
Result := TcxCurrencyFieldHelper
|
|
else
|
|
Result := TcxFloatFieldHelper;
|
|
ftBoolean:
|
|
Result := TcxBooleanFieldHelper;
|
|
ftDate, ftTime, ftDateTime:
|
|
Result := TcxDateTimeFieldHelper;
|
|
else
|
|
if AField is TBlobField then
|
|
begin
|
|
if (TBlobField(AField).BlobType = ftGraphic) or
|
|
(TBlobField(AField).BlobType = ftTypedBinary) then
|
|
Result := TcxImageFieldHelper
|
|
else if TBlobField(AField).BlobType = ftMemo then
|
|
Result := TcxMemoFieldHelper
|
|
else Result := TcxBinaryFieldHelper;
|
|
end;
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
function TcxStdWebDataSource.GetValue(ARecordIndex, AItemIndex: Integer): Variant;
|
|
var
|
|
FieldName: string;
|
|
CurrentRecord: Integer;
|
|
begin
|
|
if (DataSet = nil) or (not DataSet.Active) then
|
|
Result := Null
|
|
else if IsInserting and (DataSet.RecordCount = 0) then
|
|
Result := Null
|
|
else if IsInserting and (ARecordIndex = FocusedRowIndex) then
|
|
Result := GetInsertingValue(AItemIndex)
|
|
else
|
|
begin
|
|
if IsInserting and (ARecordIndex > FocusedRowIndex) then Dec(ARecordIndex);
|
|
BeginUpdate;
|
|
try
|
|
CurrentRecord := DataSet.RecNo - 1;
|
|
FieldName := Fields[AItemIndex].FieldName;
|
|
if CurrentRecord <> ARecordIndex then
|
|
DataSet.MoveBy(ARecordIndex - CurrentRecord);
|
|
Result := DataSet.Fields.FieldByName(FieldName).AsVariant;
|
|
if CurrentRecord <> ARecordIndex then
|
|
DataSet.MoveBy(CurrentRecord - ARecordIndex);
|
|
finally
|
|
CancelUpdate;
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
function TcxStdWebDataSource.GetDisplayText(ARecordIndex, AItemIndex: Integer): string;
|
|
var
|
|
FieldName: string;
|
|
CurrentRecord: Integer;
|
|
begin
|
|
if (DataSet = nil) or (not DataSet.Active) then
|
|
Result := ''
|
|
else if IsInserting and (DataSet.RecordCount = 0) then
|
|
Result := ''
|
|
else if IsInserting and (ARecordIndex = FocusedRowIndex) then
|
|
Result := VarToStr(GetInsertingValue(AItemIndex))
|
|
else
|
|
begin
|
|
if IsInserting and (ARecordIndex > FocusedRowIndex) then Dec(ARecordIndex);
|
|
BeginUpdate;
|
|
try
|
|
CurrentRecord := DataSet.RecNo - 1;
|
|
FieldName := Fields[AItemIndex].FieldName;
|
|
if CurrentRecord <> ARecordIndex then
|
|
DataSet.MoveBy(ARecordIndex - CurrentRecord);
|
|
Result := DataSet.Fields.FieldByName(FieldName).DisplayText;
|
|
if CurrentRecord <> ARecordIndex then
|
|
DataSet.MoveBy(CurrentRecord - ARecordIndex);
|
|
finally
|
|
CancelUpdate;
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
function TcxStdWebDataSource.GetRecordCount: Integer;
|
|
begin
|
|
if (DataSet = nil) or (not DataSet.Active) then
|
|
Result := 0
|
|
else
|
|
begin
|
|
Result := DataSet.RecordCount;
|
|
if IsInserting then Inc(Result);
|
|
end;
|
|
end;
|
|
|
|
procedure TcxStdWebDataSource.SetEditValue(AItemIndex: Integer; AValue: Variant; AType: TcxWebDataTypes);
|
|
var
|
|
Field: TField;
|
|
ACanSet: Boolean;
|
|
begin
|
|
BeginUpdate;
|
|
try
|
|
DataSet.Edit;
|
|
try
|
|
Field := GetItemField(Fields[AItemIndex].Name);
|
|
ACanSet := True;
|
|
if Assigned(OnSetEditValue) then
|
|
OnSetEditValue(Self, AItemIndex, FocusedRowIndex, AValue, ACanSet);
|
|
if ACanSet and Fields[AItemIndex].ValidateValueType(AType) and Fields[AItemIndex].ValidateValue(AValue) then
|
|
if IsInserting then
|
|
SetInsertingValue(AItemIndex, AValue)
|
|
else
|
|
if dtValue in AType then
|
|
Field.AsVariant := AValue
|
|
else
|
|
Field.AsString := AValue;
|
|
except
|
|
DataSet.Cancel;
|
|
raise;
|
|
end;
|
|
finally
|
|
EndUpdate;
|
|
end;
|
|
end;
|
|
|
|
procedure TcxStdWebDataSource.SetFocusedRowIndex(Value: Integer);
|
|
var
|
|
Processed: Boolean;
|
|
begin
|
|
if IsEditing then CancelEdit;
|
|
Processed := True;
|
|
if Assigned(OnScrolling) then
|
|
OnScrolling(self, DataSet.RecNo, Processed);
|
|
|
|
if Processed then
|
|
begin
|
|
if Value < 0 then Value := 0;
|
|
if (DataSet <> nil) and (DataSet.Active) then
|
|
begin
|
|
if Value >= DataSet.RecordCount then Value := DataSet.RecordCount - 1;
|
|
DataSet.MoveBy(Value - DataSet.RecNo + 1);
|
|
end;
|
|
|
|
if Assigned(OnScrolled) then
|
|
OnScrolled(self, DataSet.RecNo);
|
|
end;
|
|
end;
|
|
|
|
procedure TcxStdWebDataSource.SetValue(ARecordIndex, AItemIndex: Integer; const Value: Variant);
|
|
var
|
|
FieldName: string;
|
|
CurrentRecord: Integer;
|
|
begin
|
|
if (DataSet <> nil) and (DataSet.Active) then
|
|
begin
|
|
CurrentRecord := DataSet.RecNo - 1;
|
|
FieldName := Fields[AItemIndex].FieldName;
|
|
DataSet.MoveBy(ARecordIndex - CurrentRecord);
|
|
DataSet.Fields.FieldByName(FieldName).AsVariant := Value;
|
|
DataSet.MoveBy(CurrentRecord - ARecordIndex);
|
|
end;
|
|
end;
|
|
|
|
initialization
|
|
RegisterClasses([TcxAbstractWebDataBinding, TcxCustomWebDataBinding,
|
|
TcxCustomWebDataField, TcxStdWebDataField, TcxStdWebDataSource]);
|
|
|
|
end.
|
|
|
|
|