david
960b25140d
git-svn-id: https://192.168.0.254/svn/Componentes.Terceros.DevExpressVCL@55 05c56307-c608-d34a-929d-697000501d7a
2379 lines
71 KiB
ObjectPascal
2379 lines
71 KiB
ObjectPascal
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{********************************************************************}
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{ }
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{ Developer Express Visual Component Library }
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{ ExpressQuantumTreeList }
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{ }
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{ Copyright (c) 1998-2009 Developer Express Inc. }
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{ ALL RIGHTS RESERVED }
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{ }
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{ The entire contents of this file is protected by U.S. and }
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{ International Copyright Laws. Unauthorized reproduction, }
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{ reverse-engineering, and distribution of all or any portion of }
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{ the code contained in this file is strictly prohibited and may }
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{ result in severe civil and criminal penalties and will be }
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{ prosecuted to the maximum extent possible under the law. }
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{ }
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{ RESTRICTIONS }
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{ }
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{ THIS SOURCE CODE AND ALL RESULTING INTERMEDIATE FILES }
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{ (DCU, OBJ, DLL, ETC.) ARE CONFIDENTIAL AND PROPRIETARY TRADE }
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{ SECRETS OF DEVELOPER EXPRESS INC. THE REGISTERED DEVELOPER IS }
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{ LICENSED TO DISTRIBUTE THE EXPRESSQUANTUMTREELIST AND ALL }
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{ ACCOMPANYING VCL CONTROLS AS PART OF AN EXECUTABLE PROGRAM ONLY. }
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{ }
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{ THE SOURCE CODE CONTAINED WITHIN THIS FILE AND ALL RELATED }
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{ FILES OR ANY PORTION OF ITS CONTENTS SHALL AT NO TIME BE }
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{ COPIED, TRANSFERRED, SOLD, DISTRIBUTED, OR OTHERWISE MADE }
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{ AVAILABLE TO OTHER INDIVIDUALS WITHOUT EXPRESS WRITTEN CONSENT }
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{ AND PERMISSION FROM DEVELOPER EXPRESS INC. }
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{ }
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{ CONSULT THE END USER LICENSE AGREEMENT FOR INFORMATION ON }
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{ ADDITIONAL RESTRICTIONS. }
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{ }
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{********************************************************************}
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unit cxDBTL;
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{$I cxVer.inc}
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interface
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uses
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SysUtils, Classes, {$IFDEF DELPHI6} Variants, {$ENDIF} cxVariants, DB, cxEdit,
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cxDBEdit, cxControls, cxClasses, cxDataStorage, cxCustomData, cxDB, cxDBData, cxDataUtils,
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cxInplaceContainer, cxEditDBRegisteredRepositoryItems, cxTL, cxTLData;
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type
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TcxCustomDBTreeList = class;
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TcxDBTreeListColumn = class;
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TcxDBTreeListDataController = class;
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TcxDBTreeListOptionsData = class;
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TcxDBTreeListNode = class(TcxTreeListNode)
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private
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FKeyValue: Variant;
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FParentKeyValue: Variant;
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public
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property KeyValue: Variant read FKeyValue write FKeyValue;
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property ParentKeyValue: Variant read FParentKeyValue write FParentKeyValue;
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end;
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{ TcxTreeListDataLink }
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TcxTreeListDataLink = class(TDataLink)
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private
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FDataController: TcxDBTreeListDataController;
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FModified: Boolean;
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function GetDataBusy: Boolean;
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function GetDataLocate: Boolean;
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function GetOptionsData: TcxDBTreeListOptionsData;
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function GetTreeList: TcxCustomDBTreeList;
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protected
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procedure ActiveChanged; override;
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procedure DataSetChanged; override;
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procedure DataSetScrolled(Distance: Integer); override;
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procedure FocusControl(Field: TFieldRef); override;
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function IsDataSetBusy: Boolean; virtual;
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procedure LayoutChanged; override;
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procedure RecordChanged(Field: TField); override;
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procedure UpdateData; override;
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public
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constructor Create(ADataController: TcxDBTreeListDataController); virtual;
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destructor Destroy; override;
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property DataBusy: Boolean read GetDataBusy;
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property DataLocate: Boolean read GetDataLocate;
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property DataController: TcxDBTreeListDataController read FDataController;
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property Modified: Boolean read FModified write FModified;
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property OptionsData: TcxDBTreeListOptionsData read GetOptionsData;
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property TreeList: TcxCustomDBTreeList read GetTreeList;
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end;
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{ TcxDBTreeListDataController }
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TcxDBTreeListDataController = class(TcxDataTreeListDataController)
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private
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FDataLink: TcxTreeListDataLink;
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FImageIndexField: TField;
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FImageIndexFieldName: string;
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FKeyField: TField;
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FKeyFieldName: string;
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FParentKeyField: TField;
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FParentKeyFieldName: string;
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FStateIndexFieldName: string;
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FStateIndexField: TField;
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FUpdateEditing: Boolean;
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FUpdateInserting: Boolean;
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function GetDataSet: TDataSet;
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function GetDataSource: TDataSource;
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function GetTreeList: TcxCustomDBTreeList;
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procedure SetDataSource(AValue: TDataSource);
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procedure SetImageIndexFieldName(const AValue: string);
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procedure SetKeyFieldName(const AValue: string);
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procedure SetParentKeyFieldName(const AValue: string);
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procedure SetStateIndexFieldName(const AValue: string);
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protected
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function CanLocateByNode(AOldNode, ANode: TcxDBTreeListNode): Boolean;
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function CreateDataLink: TcxTreeListDataLink; virtual;
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function CreateLoader: TcxTreeListStructureLoader; override;
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procedure DataScrolled(ADistance: Integer); override;
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procedure DeleteNode(ANode: TcxTreeListNode); override;
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procedure DestroyInternalFields; virtual;
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procedure DoCopyTo(AttachNode: TcxDBTreeListNode;
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AttachMode: TcxTreeListNodeAttachMode; ANodes: TList);
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procedure DoInitInsertingNode(ANode: TcxTreeListNode); override;
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function GetFieldByName(const AFieldName: string): TField;
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function GetIsKeyFieldsEmpty: Boolean;
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function GetUniqueKeyValue(Delta: Integer = 0): Variant;
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function IsDataMode: Boolean; override;
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function IsSmartLoad: Boolean; override;
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procedure PostRecord; override;
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procedure PostValues; override;
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procedure SetFieldName(var AField: string; const AValue: string);
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procedure SetNodeParentValue(ANode: TcxDBTreeListNode; const AValue: Variant);
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procedure SyncFocused(ANode: TcxTreeListNode); override;
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procedure UpdateActive;
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procedure UpdateFocused; override;
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procedure UpdateInternalFields; virtual;
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property DataLink: TcxTreeListDataLink read FDataLink;
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property DBKeyField: TField read FKeyField;
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property DBParentField: TField read FParentKeyField;
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property DBStateIndexField: TField read FStateIndexField;
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property DBImageIndexField: TField read FImageIndexField;
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property IsKeyFieldsEmpty: Boolean read GetIsKeyFieldsEmpty;
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property UpdateEditing: Boolean read FUpdateEditing write FUpdateEditing;
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property UpdateInserting: Boolean read FUpdateInserting write FUpdateInserting;
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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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procedure Assign(Source: TPersistent); override;
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procedure Append; override;
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procedure Cancel; override;
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procedure CheckBrowseMode; override;
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procedure CreateAllItems; virtual;
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procedure Edit; override;
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procedure FocusControl(AItemIndex: Integer; var Done: Boolean); override;
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procedure Insert; override;
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function LocateByKey(const AKeyValue: Variant): Boolean;
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function SetEditValue(AItemIndex: Integer; const AValue: Variant;
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AEditValueSource: TcxDataEditValueSource): Boolean; override;
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property DataSet: TDataSet read GetDataSet;
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property TreeList: TcxCustomDBTreeList read GetTreeList;
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published
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property DataSource: TDataSource read GetDataSource write SetDataSource;
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property ImageIndexField: string read FImageIndexFieldName write SetImageIndexFieldName;
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property ParentField: string read FParentKeyFieldName write SetParentKeyFieldName;
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property KeyField: string read FKeyFieldName write SetKeyFieldName;
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property StateIndexField: string read FStateIndexFieldName write SetStateIndexFieldName;
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end;
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{ TcxDBTreeListDefaultValuesProvider }
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TcxDBTreeListDefaultValuesProvider = class(TcxCustomDBEditDefaultValuesProvider)
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public
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function IsDisplayFormatDefined(AIsCurrencyValueAccepted: Boolean): Boolean; override;
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end;
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{ TcxDBItemDataBinding }
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TcxDBItemDataBinding = class(TcxCustomItemDataBinding, IUnknown)
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private
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FField: TField;
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FFieldName: string;
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function GetDataController: TcxDBTreeListDataController;
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function GetDefaultValuesProviderProperty: TcxDBTreeListDefaultValuesProvider;
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function GetFieldName: string;
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function GetTreeList: TcxCustomDBTreeList;
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procedure SetFieldName(const AValue: string);
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protected
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procedure Changed; virtual;
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function DefaultRepositoryItem: TcxEditRepositoryItem; override;
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function GetDefaultCaption: string; override;
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function GetDefaultValuesProviderClass: TcxCustomEditDefaultValuesProviderClass; override;
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function GetValueTypeClass: TcxValueTypeClass; override;
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procedure Init; override;
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procedure InitializeField;
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// IUnknown
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function _AddRef: Integer; stdcall;
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function _Release: Integer; stdcall;
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function QueryInterface(const IID: TGUID; out Obj): HResult; virtual; stdcall;
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property DefaultValuesProvider: TcxDBTreeListDefaultValuesProvider read GetDefaultValuesProviderProperty;
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public
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procedure Assign(Source: TPersistent); override;
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property DataController: TcxDBTreeListDataController read GetDataController;
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property Field: TField read FField;
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property TreeList: TcxCustomDBTreeList read GetTreeList;
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published
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property FieldName: string read GetFieldName write SetFieldName;
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end;
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{ TcxDBTreeListColumn }
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TcxDBTreeListColumn = class(TcxTreeListColumn)
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private
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function GetDataBinding: TcxDBItemDataBinding;
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function GetField: TField;
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procedure SetDataBinding(Value: TcxDBItemDataBinding);
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protected
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procedure AssignValueFromField(ANode: TcxTreeListNode);
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function GetDataBindingClass: TcxItemDataBindingClass; override;
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function GetEditValue: Variant; override;
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function GetIsCurrency: Boolean; override;
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function GetIsTextStored: Boolean; override;
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property Field: TField read GetField;
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published
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property DataBinding: TcxDBItemDataBinding read GetDataBinding write SetDataBinding;
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end;
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{ TcxDBTreeListOptionsData }
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TcxDBTreeListOptionsData = class(TcxVirtualTreeListOptionsData)
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private
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FAutoCalcKeyValue: Boolean;
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FSmartRefresh: Boolean;
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FSyncMode: Boolean;
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function GetTreeList: TcxCustomDBTreeList;
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procedure SetSmartRefresh(AValue: Boolean);
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procedure SetSyncMode(AValue: Boolean);
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public
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constructor Create(AOwner: TPersistent); override;
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procedure Assign(Source: TPersistent); override;
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property TreeList: TcxCustomDBTreeList read GetTreeList;
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published
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property AutoCalcKeyValue: Boolean read FAutoCalcKeyValue write FAutoCalcKeyValue default False;
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property SmartRefresh: Boolean read FSmartRefresh write SetSmartRefresh default False;
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property SyncMode: Boolean read FSyncMode write SetSyncMode default True;
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property SmartLoad;
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end;
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{ TcxDBTreeListLoader }
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TcxDBTreeListLoader = class(TcxTreeListStructureLoader)
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private
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FDataSetBookmark: TObject;
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function GetDataController: TcxDBTreeListDataController;
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function GetDataSet: TDataSet;
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function GetTreeList: TcxCustomDBTreeList;
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function GetKeyField: TField;
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function GetKeyFieldName: string;
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function GetParentKeyField: TField;
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function GetParentKeyFieldName: string;
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protected
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HasChildren: TList;
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procedure AssignValues(ANode: TcxTreeListNode); override;
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procedure DoLoad(ALoadingNode: TcxTreeListNode); override;
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function FindLoadedNode(const AParentValue: Variant; var AIndex: Integer): Boolean;
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function FindNode(var ANode: TcxDBTreeListNode; const AValue: Variant): Boolean;
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function GetImageIndex(ANode: TcxTreeListNode; AIndexType: TcxTreeListImageIndexType): Integer; override;
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function GetImageIndexAsInteger(AField: TField): Integer;
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function IsChildrenExist(ANode: TcxTreeListNode): Boolean; override;
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function IsExistKeyRoot(AParentValue: Variant): Boolean; virtual;
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procedure LoadLevel(ANode: TcxDBTreeListNode; const AParentValue: Variant; ANewNodes: TList);
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procedure LoadLevelBack(AParentValue: Variant);
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function LoadValues(const AKeyValue, AParentKeyValue: Variant): TcxDBTreeListNode;
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procedure RestorePos; override;
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procedure SavePos; override;
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public
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constructor Create(AOwner: TcxDataTreeListDataController); override;
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destructor Destroy; override;
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procedure Load(ANode: TcxTreeListNode); override;
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property DataController: TcxDBTreeListDataController read GetDataController;
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property DataSet: TDataSet read GetDataSet;
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property KeyField: TField read GetKeyField;
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property KeyFieldName: string read GetKeyFieldName;
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property ParentKeyField: TField read GetParentKeyField;
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property ParentKeyFieldName: string read GetParentKeyFieldName;
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property TreeList: TcxCustomDBTreeList read GetTreeList;
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end;
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{ TcxCustomDBTreeList }
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TcxDBTreeListGetUniqueKeyValueEvent = procedure(Sender: TcxCustomDBTreeList; var KeyValue: Variant) of object;
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TcxDBTreeListInitInsertingRecordEvent = procedure(Sender: TcxCustomDBTreeList; AFocusedNode: TcxDBTreeListNode; var AHandled: Boolean) of object;
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TcxCustomDBTreeList = class(TcxCustomDataTreeList)
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private
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FDataBusy: Boolean;
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FDataLocate: Boolean;
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FIsRefresh: Boolean;
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FIsRefreshValues: Boolean;
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FRootValue: Variant;
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FUpdateFocused: Boolean;
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FUpdatingNode: TcxDBTreeListNode;
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FOnGetUniqueKeyValue: TcxDBTreeListGetUniqueKeyValueEvent;
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FOnInitInsertingRecord: TcxDBTreeListInitInsertingRecordEvent;
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function GetDataController: TcxDBTreeListDataController;
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function GetDataSet: TDataSet;
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function GetLoader: TcxDBTreeListLoader;
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function GetOptionsData: TcxDBTreeListOptionsData;
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procedure SetDataController(AValue: TcxDBTreeListDataController);
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procedure SetOptionsData(AValue: TcxDBTreeListOptionsData);
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procedure SetRootValue(const AValue: Variant);
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protected
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procedure AssignData(ASource: TcxCustomTreeList); override;
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procedure CreateAllItems; override;
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function CreateNode: TcxTreeListNode; override;
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procedure DataChanged; override;
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procedure DataModeChanged; override;
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procedure DoClear; override;
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procedure DoDeleteNode(ANode: TcxTreeListNode); override;
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procedure DeleteNodes(AList: TList); override;
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function DoInitInsertingNode(ANode: TcxDBTreeListNode): Boolean; virtual;
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procedure DoMoveTo(AttachNode: TcxTreeListNode;
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AttachMode: TcxTreeListNodeAttachMode; ANodes: TList; IsCopy: Boolean); override;
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function FindLoadedNodeByKeyValue(const AValue: Variant): TcxDBTreeListNode;
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procedure FindNodeById;
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function GetDataControllerClass: TcxCustomDataControllerClass; override;
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function GetOptionsDataClass: TcxControlOptionsDataClass; override;
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function GetTreeListColumnClass: TcxTreeListColumnClass; override;
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procedure InitializeFields; override;
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function InsertNode(ARelative: TcxTreeListNode; IsAppend: Boolean): Boolean; override;
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procedure InternalInsertNode(IsAppend: Boolean);
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function IsAutoCalcKeyValue: Boolean;
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function IsDataSettingsValid: Boolean; override;
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function IsNodeInserting(ANode: TcxTreeListNode): Boolean; override;
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function IsTreeListLocked: Boolean; override;
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procedure RefreshTree;
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procedure LoadListByID(const AKeyValue: Variant; AList: TList);
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procedure LoadListByNode(ANode: TcxDBTreeListNode; AList: TList);
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procedure RefreshFields; override;
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function SupportCreateAllItems: Boolean; override;
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procedure UpdateFocusedNode(AColumn: TcxTreeListColumn); override;
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property DataBusy: Boolean read FDataBusy write FDataBusy;
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property DataController: TcxDBTreeListDataController read GetDataController write SetDataController;
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property DataLocate: Boolean read FDataLocate write FDataLocate;
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property DataSet: TDataSet read GetDataSet;
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property IsRefresh: Boolean read FIsRefresh write FIsRefresh;
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property IsRefreshValues: Boolean read FIsRefreshValues write FIsRefreshValues;
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property Loader: TcxDBTreeListLoader read GetLoader;
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property OptionsData: TcxDBTreeListOptionsData read GetOptionsData write SetOptionsData;
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property RootValue: Variant read FRootValue write SetRootValue;
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property UpdateFocused: Boolean read FUpdateFocused write FUpdateFocused;
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property UpdatingNode: TcxDBTreeListNode read FUpdatingNode write FUpdatingNode;
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property OnGetUniqueKeyValue: TcxDBTreeListGetUniqueKeyValueEvent read FOnGetUniqueKeyValue write FOnGetUniqueKeyValue;
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property OnInitInsertingRecord: TcxDBTreeListInitInsertingRecordEvent read FOnInitInsertingRecord write FOnInitInsertingRecord;
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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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procedure Assign(Source: TPersistent); override;
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function FindNodeByKeyValue(const AKeyValue: Variant; AStartNode: TcxTreeListNode = nil;
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AExpandedOnly: Boolean = False; AForward: Boolean = True): TcxDBTreeListNode;
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//
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function ExecuteAction(Action: TBasicAction): Boolean; override;
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function UpdateAction(Action: TBasicAction): Boolean; override;
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//
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end;
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{ TcxDBTreeList }
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TcxDBTreeList = class(TcxCustomDBTreeList)
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public
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property Customizing;
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property ColumnCount;
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property Columns;
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property FocusedColumn;
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property FocusedNode;
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property HitTest;
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property IsEditing;
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property SelectionCount;
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property Selections;
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property Sorted;
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property SortedColumnCount;
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property SortedColumns;
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property TopVisibleNode;
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property VisibleColumnCount;
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property VisibleColumns;
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property VisibleCount;
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published
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property Align;
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property Anchors;
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property Bands;
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property BorderStyle;
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property Constraints;
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property Cursor;
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property DataController;
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property DefaultLayout;
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property DefaultRowHeight;
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property DragCursor;
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property DragKind;
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property DragMode;
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property Enabled;
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property Font;
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property HelpContext;
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property HelpKeyword;
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property HelpType;
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property Hint;
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property Images;
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property LookAndFeel;
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property OptionsBehavior;
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property OptionsCustomizing;
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property OptionsData;
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property OptionsSelection;
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property OptionsView;
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property ParentColor;
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property ParentFont;
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property PopupMenu;
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property PopupMenus;
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property Preview;
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property RootValue;
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property StateImages;
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property Styles;
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property TabOrder;
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property TabStop;
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property Visible;
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property OnAfterSummary;
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property OnBandHeaderClick;
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property OnBandPosChanged;
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property OnBandSizeChanged;
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property OnBeginDragNode;
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property OnCanFocusNode;
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property OnCanResize;
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property OnCanSelectNode;
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property OnChange;
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property OnClick;
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property OnCollapsed;
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property OnCollapsing;
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property OnColumnHeaderClick;
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property OnColumnPosChanged;
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property OnColumnSizeChanged;
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property OnCompare;
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property OnConstrainedResize;
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property OnContextPopup;
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property OnCustomDrawBackgroundCell;
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property OnCustomDrawBandCell;
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property OnCustomDrawBandHeaderCell;
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property OnCustomDrawDataCell;
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property OnCustomDrawFooterCell;
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property OnCustomDrawHeaderCell;
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property OnCustomDrawIndentCell;
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property OnCustomDrawIndicatorCell;
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property OnCustomDrawPreviewCell;
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property OnCustomizationFormVisibleChanged;
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property OnDataChanged;
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property OnDblClick;
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property OnDeletion;
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property OnDockDrop;
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property OnDockOver;
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property OnDragDrop;
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property OnDragOver;
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property OnEdited;
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property OnEditing;
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property OnEditValueChanged;
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property OnEndDock;
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property OnEndDrag;
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property OnEnter;
|
|
property OnExit;
|
|
property OnExpanded;
|
|
property OnExpanding;
|
|
property OnFocusedColumnChanged;
|
|
property OnFocusedNodeChanged;
|
|
property OnGetCellHint;
|
|
property OnGetDragDropText;
|
|
property OnGetLevelImages;
|
|
property OnGetNodeHeight;
|
|
property OnGetNodeImageIndex;
|
|
property OnGetNodePreviewHeight;
|
|
property OnGetSiteInfo;
|
|
property OnGetStoredProperties;
|
|
property OnGetStoredPropertyValue;
|
|
property OnGetUniqueKeyValue;
|
|
property OnHotTrackNode;
|
|
property OnInitEdit;
|
|
property OnInitInsertingRecord;
|
|
property OnInitStoredObject;
|
|
property OnIsGroupNode;
|
|
property OnKeyDown;
|
|
property OnKeyPress;
|
|
property OnKeyUp;
|
|
property OnLayoutChanged;
|
|
property OnLeftPosChanged;
|
|
property OnMouseEnter;
|
|
property OnMouseLeave;
|
|
property OnMouseDown;
|
|
property OnMouseMove;
|
|
property OnMouseUp;
|
|
property OnMouseWheel;
|
|
property OnMouseWheelDown;
|
|
property OnMouseWheelUp;
|
|
property OnMoveTo;
|
|
property OnNodeChanged;
|
|
property OnNodeCheckChanged;
|
|
property OnResize;
|
|
property OnSelectionChanged;
|
|
property OnSetStoredPropertyValue;
|
|
property OnSorted;
|
|
property OnSorting;
|
|
property OnStartDock;
|
|
property OnStartDrag;
|
|
property OnSummary;
|
|
property OnTopRecordIndexChanged;
|
|
property OnUnDock;
|
|
property PopupMenusEvents;
|
|
property StylesEvents;
|
|
end;
|
|
|
|
implementation
|
|
|
|
uses
|
|
cxTLStrs, Math;
|
|
|
|
type
|
|
TDataSetAccess = class(TDataSet);
|
|
|
|
TDataSetBookmark = class
|
|
public
|
|
SaveActiveRecord: Integer;
|
|
SaveBOF: Boolean;
|
|
SaveBookmark: TcxBookMark;
|
|
SaveEOF: Boolean;
|
|
end;
|
|
|
|
var
|
|
DataLinks: TList;
|
|
|
|
function cxDataSetCreateBookmark(ADataSet: TDataSet): TDataSetBookmark;
|
|
begin
|
|
Result := TDataSetBookmark.Create;
|
|
with TDataSetAccess(ADataSet) do
|
|
begin
|
|
if BookmarkAvailable then
|
|
Result.SaveBookmark := Bookmark;
|
|
Result.SaveActiveRecord := ActiveRecord;
|
|
Result.SaveBOF := BOF;
|
|
Result.SaveEOF := EOF;
|
|
end;
|
|
end;
|
|
|
|
procedure cxDataSetRestoreBookmark(ADataSet: TDataSet; var ABookmark: TDataSetBookmark);
|
|
begin
|
|
try
|
|
with TDataSetAccess(ADataSet) do
|
|
begin
|
|
if (Length(ABookmark.SaveBookmark) > 0) and BookmarkValid(TBookmark(ABookmark.SaveBookmark)) then
|
|
try
|
|
Bookmark := ABookmark.SaveBookmark;
|
|
if ActiveRecord > ABookmark.SaveActiveRecord then
|
|
begin
|
|
MoveBy(BufferCount - ActiveRecord - 1 + ActiveRecord - ABookmark.SaveActiveRecord);
|
|
MoveBy(ABookmark.SaveActiveRecord - BufferCount + 1);
|
|
end
|
|
else
|
|
if ActiveRecord < ABookmark.SaveActiveRecord then
|
|
begin
|
|
MoveBy(-ActiveRecord + ActiveRecord - ABookmark.SaveActiveRecord);
|
|
MoveBy(ABookmark.SaveActiveRecord);
|
|
end;
|
|
if ABookmark.SaveBOF and not BOF then Prior;
|
|
if ABookmark.SaveEOF and not EOF then Next;
|
|
except
|
|
on EDatabaseError do;
|
|
end;
|
|
end;
|
|
finally
|
|
FreeAndNil(ABookmark);
|
|
end;
|
|
end;
|
|
|
|
//
|
|
function cxCompareByKeyValue(ANode1, ANode2: TcxDBTreeListNode): Integer;
|
|
begin
|
|
Result := VarCompare(ANode1.KeyValue, ANode2.KeyValue);
|
|
end;
|
|
|
|
function cxCompareByParentKey(ANode1, ANode2: TcxDBTreeListNode): Integer;
|
|
begin
|
|
Result := VarCompare(ANode1.ParentKeyValue, ANode2.ParentKeyValue);
|
|
end;
|
|
|
|
function cxFindKey(ANode: TcxDBTreeListNode; AKey: PVariant): Boolean;
|
|
begin
|
|
Result := VarCompare(ANode.KeyValue, AKey^) = 0;
|
|
end;
|
|
|
|
{ TcxTreeListDataLink }
|
|
|
|
constructor TcxTreeListDataLink.Create(
|
|
ADataController: TcxDBTreeListDataController);
|
|
begin
|
|
FDataController := ADataController;
|
|
DataLinks.Add(Self);
|
|
end;
|
|
|
|
destructor TcxTreeListDataLink.Destroy;
|
|
begin
|
|
DataLinks.Remove(Self);
|
|
inherited Destroy;
|
|
end;
|
|
|
|
procedure TcxTreeListDataLink.ActiveChanged;
|
|
begin
|
|
TreeList.InternalClearAll;
|
|
if Active then
|
|
begin
|
|
TreeList.InitializeFields;
|
|
TreeList.FullRefresh
|
|
end
|
|
else
|
|
TreeList.LayoutChanged;
|
|
end;
|
|
|
|
procedure TcxTreeListDataLink.DataSetChanged;
|
|
begin
|
|
TreeList.ImageChanged;
|
|
if DataSet.State <> dsInsert then
|
|
TreeList.UpdatingNode := nil;
|
|
if IsDataSetBusy then
|
|
begin
|
|
DataSetScrolled(0);
|
|
Exit;
|
|
end;
|
|
if DataLocate then
|
|
begin
|
|
TreeList.BeginUpdate;
|
|
try
|
|
TreeList.UpdateFocusedNode(nil);
|
|
finally
|
|
TreeList.EndUpdate;
|
|
end;
|
|
TreeList.DataLocate := False;
|
|
Exit;
|
|
end;
|
|
if DataBusy or TreeList.IsRefresh or (DataSet.State = dsEdit) or (DataSet.State = dsSetKey) then
|
|
Exit;
|
|
if not DataController.IsKeyFieldsEmpty and (DataSet.State = dsInsert) then
|
|
begin
|
|
TreeList.InternalInsertNode(DataSet.EOF);
|
|
Exit;
|
|
end;
|
|
TreeList.RefreshTree;
|
|
FModified := False;
|
|
end;
|
|
|
|
procedure TcxTreeListDataLink.DataSetScrolled(Distance: Integer);
|
|
begin
|
|
DataController.DataScrolled(Distance);
|
|
end;
|
|
|
|
procedure TcxTreeListDataLink.FocusControl(Field: TFieldRef);
|
|
var
|
|
I: Integer;
|
|
ADone: Boolean;
|
|
begin
|
|
if not Assigned(Field) or not Assigned(Field^) then Exit;
|
|
ADone := False;
|
|
for I := 0 to TreeList.ColumnCount - 1 do
|
|
if TcxDBTreeListColumn(TreeList.Columns[I]).DataBinding.Field = Field^ then
|
|
begin
|
|
DataController.FocusControl(TcxDBTreeListColumn(TreeList.Columns[I]).ItemIndex, ADone);
|
|
if ADone then Break;
|
|
end;
|
|
if ADone then
|
|
Field^ := nil;
|
|
end;
|
|
|
|
function TcxTreeListDataLink.IsDataSetBusy: Boolean;
|
|
var
|
|
I: Integer;
|
|
ADataLink: TcxTreeListDataLink;
|
|
begin
|
|
Result := False;
|
|
for I := 0 to DataLinks.Count - 1 do
|
|
begin
|
|
ADataLink := TcxTreeListDataLink(DataLinks[I]);
|
|
Result := (ADataLink.DataSet = DataSet) and ADataLink.DataBusy;
|
|
if Result then Break;
|
|
end;
|
|
end;
|
|
|
|
procedure TcxTreeListDataLink.LayoutChanged;
|
|
begin
|
|
DataSetChanged;
|
|
end;
|
|
|
|
procedure TcxTreeListDataLink.RecordChanged(Field: TField);
|
|
var
|
|
I: Integer;
|
|
AColumn: TcxTreeListColumn;
|
|
begin
|
|
if not (DataSet.State in dsEditModes) or TreeList.OptionsData.SmartRefresh or
|
|
((DataSet.State = dsInsert) and (TreeList.UpdatingNode = nil)) or DataController.UpdateInserting then Exit;
|
|
TreeList.BeginUpdate;
|
|
try
|
|
if Field = nil then
|
|
TreeList.UpdateFocusedNode(nil)
|
|
else
|
|
for I := 0 to TreeList.ColumnCount - 1 do
|
|
begin
|
|
AColumn := TreeList.Columns[I];
|
|
if TcxDBTreeListColumn(AColumn).DataBinding.Field = Field then
|
|
TreeList.UpdateFocusedNode(AColumn);
|
|
end;
|
|
finally
|
|
TreeList.EndUpdate;
|
|
end;
|
|
end;
|
|
|
|
procedure TcxTreeListDataLink.UpdateData;
|
|
begin
|
|
TreeList.UpdateData;
|
|
TreeList.UpdateFocusedNode(nil);
|
|
end;
|
|
|
|
function TcxTreeListDataLink.GetDataBusy: Boolean;
|
|
begin
|
|
Result := TreeList.DataBusy;
|
|
end;
|
|
|
|
function TcxTreeListDataLink.GetDataLocate: Boolean;
|
|
begin
|
|
Result := TreeList.DataLocate;
|
|
end;
|
|
|
|
function TcxTreeListDataLink.GetOptionsData: TcxDBTreeListOptionsData;
|
|
begin
|
|
Result := TreeList.OptionsData;
|
|
end;
|
|
|
|
function TcxTreeListDataLink.GetTreeList: TcxCustomDBTreeList;
|
|
begin
|
|
Result := DataController.TreeList;
|
|
end;
|
|
|
|
{ TcxDBTreeListDataController }
|
|
|
|
constructor TcxDBTreeListDataController.Create(AOwner: TComponent);
|
|
begin
|
|
inherited Create(AOwner);
|
|
FDataLink := CreateDataLink;
|
|
end;
|
|
|
|
destructor TcxDBTreeListDataController.Destroy;
|
|
begin
|
|
FDataLink.Free;
|
|
inherited Destroy;
|
|
end;
|
|
|
|
procedure TcxDBTreeListDataController.Assign(Source: TPersistent);
|
|
begin
|
|
inherited Assign(Source);
|
|
if Source is TcxDBTreeListDataController then
|
|
begin
|
|
DataSource := TcxDBTreeListDataController(Source).DataSource;
|
|
ParentField := TcxDBTreeListDataController(Source).ParentField;
|
|
KeyField := TcxDBTreeListDataController(Source).KeyField;
|
|
ImageIndexField := TcxDBTreeListDataController(Source).ImageIndexField;
|
|
StateIndexField := TcxDBTreeListDataController(Source).StateIndexField;
|
|
end;
|
|
end;
|
|
|
|
procedure TcxDBTreeListDataController.Append;
|
|
begin
|
|
inherited Append;
|
|
if DataSet <> nil then
|
|
DataSet.Append;
|
|
end;
|
|
|
|
procedure TcxDBTreeListDataController.Cancel;
|
|
begin
|
|
inherited Cancel;
|
|
if (DataSet <> nil) and not UpdateEditing then
|
|
DataSet.Cancel;
|
|
end;
|
|
|
|
procedure TcxDBTreeListDataController.CheckBrowseMode;
|
|
begin
|
|
if not Assigned(DataSet) then Exit;
|
|
if DataSet.State <> dsInactive then
|
|
TDataSetAccess(DataSet).DataEvent(deCheckBrowseMode, 0);
|
|
if DataSet.State in [dsEdit, dsInsert] then
|
|
begin
|
|
DataSet.UpdateRecord;
|
|
if DataSet.Modified then
|
|
DataSet.Post
|
|
else
|
|
DataSet.Cancel;
|
|
end;
|
|
end;
|
|
|
|
procedure TcxDBTreeListDataController.CreateAllItems;
|
|
var
|
|
I: Integer;
|
|
ABand: TcxTreeListBand;
|
|
AColumn: TcxDBTreeListColumn;
|
|
begin
|
|
if (DataSet = nil) or (DataSet.FieldCount = 0) then Exit;
|
|
TreeList.SetGlassCursor;
|
|
try
|
|
TreeList.BeginUpdate;
|
|
try
|
|
ABand := TreeList.GetDefaultColumnContainer;
|
|
for I := 0 to DataSet.FieldCount - 1 do
|
|
begin
|
|
AColumn := TcxDBTreeListColumn(TreeList.CreateColumn(ABand));
|
|
AColumn.DataBinding.FieldName := DataSet.Fields[I].FieldName;
|
|
if TreeList.Owner <> nil then
|
|
AColumn.Name := CreateUniqueName(TreeList.Owner, TreeList, AColumn,
|
|
scxTLPrefixName, DataSet.Fields[I].FieldName);
|
|
AColumn.Visible := DataSet.Fields[I].Visible;
|
|
end;
|
|
finally
|
|
TreeList.EndUpdate;
|
|
end;
|
|
finally
|
|
TreeList.RestoreCursor;
|
|
TreeList.Modified;
|
|
end;
|
|
end;
|
|
|
|
procedure TcxDBTreeListDataController.Edit;
|
|
begin
|
|
if (DataSet = nil) or (DataSet.State = dsEdit) then Exit;
|
|
if CanLocateByNode(nil, TcxDBTreeListNode(TreeList.FocusedNode)) then
|
|
LocateByKey(TcxDBTreeListNode(TreeList.FocusedNode).KeyValue);
|
|
DataLink.Edit;
|
|
if DataSet.State <> dsEdit then Exit;
|
|
inherited Edit;
|
|
end;
|
|
|
|
procedure TcxDBTreeListDataController.FocusControl(
|
|
AItemIndex: Integer; var Done: Boolean);
|
|
begin
|
|
TcxDBTreeListColumn(GetItem(AItemIndex)).Editing := True;
|
|
Done := TcxDBTreeListColumn(GetItem(AItemIndex)).Editing;
|
|
end;
|
|
|
|
procedure TcxDBTreeListDataController.Insert;
|
|
begin
|
|
inherited Insert;
|
|
if DataSet <> nil then
|
|
DataSet.Insert;
|
|
end;
|
|
|
|
function TcxDBTreeListDataController.LocateByKey(
|
|
const AKeyValue: Variant): Boolean;
|
|
var
|
|
ANode: TcxDBTreeListNode;
|
|
begin
|
|
Result := False;
|
|
if Datalink.Active then
|
|
begin
|
|
TreeList.DataBusy := not (DataSet.State in dsEditModes);
|
|
TreeList.DataLocate := True;
|
|
if (EditingNode <> nil) and not IsValueChanged then
|
|
Cancel;
|
|
CheckBrowseMode;
|
|
Result := TreeList.UpdateFocused or DataSet.Locate(KeyField, AKeyValue, []);
|
|
if Result then
|
|
begin
|
|
ANode := TreeList.FindNodeByKeyValue(GetFieldValue(DBKeyField));
|
|
if ANode <> nil then
|
|
begin
|
|
ANode.Focused := True;
|
|
ANode.MakeVisible;
|
|
end;
|
|
end;
|
|
TreeList.DataLocate := False;
|
|
TreeList.DataBusy := False;
|
|
end;
|
|
end;
|
|
|
|
function TcxDBTreeListDataController.SetEditValue(AItemIndex: Integer;
|
|
const AValue: Variant; AEditValueSource: TcxDataEditValueSource): Boolean;
|
|
var
|
|
AColumn: TcxDBTreeListColumn;
|
|
begin
|
|
//Result := inherited SetEditValue(AItemIndex, AValue, AEditValueSource);
|
|
Result := False;
|
|
AColumn := TcxDBTreeListColumn(TreeList.ContainerList[AItemIndex]);
|
|
if (DataSet.State in [dsInsert, dsEdit]) and (AColumn.Field <> nil) and (EditingNode <> nil) then
|
|
begin
|
|
if (AEditValueSource = evsText) or Assigned(AColumn.Field.OnSetText) then
|
|
AColumn.Field.Text := VarToStr(AValue)
|
|
else
|
|
SetFieldValue(AColumn.Field, AValue);
|
|
Result := True;
|
|
end;
|
|
end;
|
|
|
|
procedure TcxDBTreeListDataController.UpdateInternalFields;
|
|
begin
|
|
FKeyField := GetFieldByName(KeyField);
|
|
FParentKeyField := GetFieldByName(ParentField);
|
|
FImageIndexField := GetFieldByName(ImageIndexField);
|
|
FStateIndexField := GetFieldByName(StateIndexField);
|
|
end;
|
|
|
|
function TcxDBTreeListDataController.CanLocateByNode(AOldNode, ANode: TcxDBTreeListNode): Boolean;
|
|
begin
|
|
Result := TreeList.OptionsData.SyncMode and not IsKeyFieldsEmpty and
|
|
(ANode <> nil) and not DataLink.IsDataSetBusy and not TreeList.IsRefresh;
|
|
if not Result or ((AOldNode = ANode) and (GetFieldValue(DBKeyField) = ANode.KeyValue)) then Exit;
|
|
Result := not ((ANode = TreeList.UpdatingNode) and
|
|
DataLink.Active and (DataLink.DataSet.State = dsInsert));
|
|
end;
|
|
|
|
function TcxDBTreeListDataController.CreateDataLink: TcxTreeListDataLink;
|
|
begin
|
|
Result := TcxTreeListDataLink.Create(Self);
|
|
end;
|
|
|
|
function TcxDBTreeListDataController.CreateLoader: TcxTreeListStructureLoader;
|
|
begin
|
|
Result := TcxDBTreeListLoader.Create(Self);
|
|
end;
|
|
|
|
procedure TcxDBTreeListDataController.DataScrolled(ADistance: Integer);
|
|
var
|
|
ANode: TcxTreeListNode;
|
|
begin
|
|
TreeList.UpdateFocused := True;
|
|
UpdateActive;
|
|
if IsSmartLoad and (ADistance <> 0) and not IsKeyFieldsEmpty then
|
|
begin
|
|
ANode := TreeList.FindNodeByKeyValue(GetFieldValue(DBKeyField));
|
|
if ANode <> nil then
|
|
ANode.MakeVisible;
|
|
end;
|
|
// inherited DataScrolled(ADistance);
|
|
TreeList.UpdateFocused := False;
|
|
end;
|
|
|
|
procedure TcxDBTreeListDataController.DeleteNode(ANode: TcxTreeListNode);
|
|
var
|
|
I: Integer;
|
|
AList: TList;
|
|
begin
|
|
DataSet.DisableControls;
|
|
try
|
|
if not ANode.HasChildren then
|
|
begin
|
|
if LocateByKey(TcxDBTreeListNode(ANode).KeyValue) then
|
|
DataSet.Delete
|
|
end
|
|
else
|
|
begin
|
|
AList := TList.Create;
|
|
try
|
|
if not TreeList.OptionsData.SmartLoad then
|
|
TreeList.LoadListByNode(TcxDBTreeListNode(ANode), AList)
|
|
else
|
|
TreeList.LoadListByID(TcxDBTreeListNode(ANode).KeyValue, AList);
|
|
// Delete Nodes
|
|
for I := AList.Count - 1 downto 0 do
|
|
if LocateByKey(PVariant(AList[I])^) then
|
|
DataSet.Delete;
|
|
finally
|
|
for I := 0 to AList.Count - 1 do
|
|
Dispose(AList[I]);
|
|
AList.Free;
|
|
end;
|
|
end;
|
|
inherited DeleteNode(ANode);
|
|
finally
|
|
DataSet.EnableControls;
|
|
end;
|
|
end;
|
|
|
|
procedure TcxDBTreeListDataController.DestroyInternalFields;
|
|
begin
|
|
FKeyField.Free;
|
|
FParentKeyField.Free;
|
|
FImageIndexField.Free;
|
|
FStateIndexField.Free;
|
|
end;
|
|
|
|
procedure TcxDBTreeListDataController.DoCopyTo(AttachNode: TcxDBTreeListNode;
|
|
AttachMode: TcxTreeListNodeAttachMode; ANodes: TList);
|
|
|
|
type
|
|
PNodeBuffer =^TNodeBuffer;
|
|
TNodeBuffer = record
|
|
Key: Variant;
|
|
Buffer: Variant;
|
|
Items: TList;
|
|
end;
|
|
|
|
var
|
|
F: TField;
|
|
I: Integer;
|
|
AFieldList, BufferList: TList;
|
|
AKeyField, AParentField: TField;
|
|
NewParentValue, KeyValue, Delta: Variant;
|
|
|
|
function LoadBufferValues(const AKeyValue: Variant): PNodeBuffer;
|
|
var
|
|
I: Integer;
|
|
begin
|
|
New(Result);
|
|
Result^.Items := nil;
|
|
Result^.Key := AKeyValue;
|
|
Result^.Buffer := VarArrayCreate([0, AFieldList.Count - 1], varVariant);
|
|
for I := 0 to AFieldList.Count - 1 do
|
|
Result^.Buffer[I] := GetFieldValue(TField(AFieldList[I]));
|
|
end;
|
|
|
|
procedure LoadSubItems(PBuffer: PNodeBuffer);
|
|
var
|
|
AParentValue: Variant;
|
|
I: Integer;
|
|
begin
|
|
with DataSet do
|
|
begin
|
|
AParentValue := PBuffer^.Key;
|
|
if Locate(ParentField, AParentValue, []) then
|
|
begin
|
|
PBuffer^.Items := TList.Create;
|
|
while not EOF and (GetFieldValue(AParentField) = AParentValue) do
|
|
begin
|
|
PBuffer^.Items.Add(LoadBufferValues(GetFieldValue(AKeyField)));
|
|
Next;
|
|
end;
|
|
for I := 0 to PBuffer^.Items.Count - 1 do
|
|
LoadSubItems(PNodeBuffer(PBuffer^.Items[I]));
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
procedure AddNewNode(PBuffer: PNodeBuffer; const AParentValue: Variant);
|
|
var
|
|
I: Integer;
|
|
Key: Variant;
|
|
begin
|
|
with DataSet do
|
|
begin
|
|
Append;
|
|
if AKeyField.IsNull and TreeList.OptionsData.AutoCalcKeyValue then
|
|
begin
|
|
SetFieldValue(AKeyField, GetUniqueKeyValue(Delta));
|
|
Inc(Delta);
|
|
end;
|
|
SetFieldValue(AParentField, AParentValue);
|
|
for I := 0 to AFieldList.Count - 1 do
|
|
SetFieldValue(TField(AFieldList[I]), PBuffer^.Buffer[I]);
|
|
Post;
|
|
Key := GetFieldValue(AKeyField);
|
|
// add children
|
|
if PBuffer^.Items <> nil then
|
|
for I := 0 to PBuffer^.Items.Count - 1 do
|
|
AddNewNode(PBuffer^.Items[I], Key);
|
|
end;
|
|
end;
|
|
|
|
procedure FreeBuffer(PBuffer: PNodeBuffer);
|
|
var
|
|
I: Integer;
|
|
L: TList;
|
|
begin
|
|
L := PBuffer^.Items;
|
|
if L <> nil then
|
|
begin
|
|
for I := 0 to L.Count - 1 do
|
|
FreeBuffer(L[I]);
|
|
FreeAndNil(L);
|
|
end;
|
|
Dispose(PBuffer);
|
|
end;
|
|
|
|
begin
|
|
AParentField := DBParentField;
|
|
AKeyField := DBKeyField;
|
|
with DataSet do
|
|
begin
|
|
if AttachMode in [tlamAddChild, tlamAddChildFirst] then
|
|
NewParentValue := AttachNode.KeyValue
|
|
else
|
|
NewParentValue := AttachNode.ParentKeyValue;
|
|
DisableControls;
|
|
try
|
|
// copy drag nodes
|
|
AFieldList := TList.Create;
|
|
try
|
|
// create Field List
|
|
for I := 0 to FieldCount - 1 do
|
|
begin
|
|
F := Fields[I];
|
|
if F.FieldKind = fkLookup then
|
|
F := FindField(F.KeyFields)
|
|
else
|
|
if (F = AKeyField) or (F = AParentField) or (F.FieldKind <> fkData) then
|
|
F := nil;
|
|
if Assigned(F) and F.CanModify then
|
|
AFieldList.Add(F);
|
|
end;
|
|
if AFieldList.Count > 0 then
|
|
begin
|
|
// sort and remove duplicates
|
|
ANodes.Sort(@cxCompareByParentKey);
|
|
for I := ANodes.Count - 1 downto 1 do
|
|
if TcxTreeListNode(ANodes[I]).HasAsParent(TcxTreeListNode(ANodes[I - 1])) then
|
|
ANodes.Delete(I);
|
|
// make Buffer List
|
|
BufferList := TList.Create;
|
|
try
|
|
for I := 0 to ANodes.Count - 1 do
|
|
begin
|
|
KeyValue := TcxDBTreeListNode(ANodes[I]).KeyValue;
|
|
if Locate(KeyField, KeyValue, []) then
|
|
begin
|
|
BufferList.Add(LoadBufferValues(KeyValue));
|
|
LoadSubItems(BufferList[I]);
|
|
end;
|
|
end;
|
|
// create new nodes
|
|
Delta := 0;
|
|
for I := 0 to BufferList.Count - 1 do
|
|
AddNewNode(BufferList[I], NewParentValue);
|
|
finally
|
|
for I := 0 to BufferList.Count - 1 do
|
|
FreeBuffer(PNodeBuffer(BufferList[I]));
|
|
FreeAndNil(BufferList);
|
|
end;
|
|
end;
|
|
finally
|
|
FreeAndNil(AFieldList);
|
|
end;
|
|
finally
|
|
EnableControls;
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
procedure TcxDBTreeListDataController.DoInitInsertingNode(
|
|
ANode: TcxTreeListNode);
|
|
var
|
|
AInit: Boolean;
|
|
begin
|
|
AInit := TreeList.DoInitInsertingNode(TcxDBTreeListNode(ANode));
|
|
UpdateInserting := True;
|
|
try
|
|
if not AInit and TreeList.IsAutoCalcKeyValue then
|
|
SetFieldValue(DBKeyField, GetUniqueKeyValue(0))
|
|
else
|
|
if AInit then
|
|
begin
|
|
SetFieldValue(DBKeyField, TcxDBTreeListNode(ANode).KeyValue);
|
|
SetFieldValue(DBParentField, TcxDBTreeListNode(ANode).ParentKeyValue);
|
|
end;
|
|
finally
|
|
UpdateInserting := False;
|
|
end;
|
|
TreeList.Loader.AssignValues(ANode);
|
|
end;
|
|
|
|
function TcxDBTreeListDataController.GetFieldByName(
|
|
const AFieldName: string): TField;
|
|
begin
|
|
Result := nil;
|
|
if DataSet <> nil then
|
|
Result := DataSet.FindField(AFieldName);
|
|
end;
|
|
|
|
function TcxDBTreeListDataController.GetIsKeyFieldsEmpty: Boolean;
|
|
begin
|
|
Result := not Assigned(DBParentField) or not Assigned(DBKeyField);
|
|
end;
|
|
|
|
function TcxDBTreeListDataController.GetUniqueKeyValue(
|
|
Delta: Integer = 0): Variant;
|
|
var
|
|
AList: TList;
|
|
begin
|
|
Result := Null;
|
|
if Assigned(TreeList.FOnGetUniqueKeyValue) then
|
|
TreeList.FOnGetUniqueKeyValue(TreeList, Result)
|
|
else
|
|
if not TreeList.OptionsData.SmartLoad then
|
|
try
|
|
AList := TcxDBTreeListLoader(Loader).CloneList(TreeList.AbsoluteItemsList);
|
|
try
|
|
if not IsKeyFieldsEmpty and (AList.Count > 0) then
|
|
begin
|
|
AList.Sort(@cxCompareByKeyValue);
|
|
Result := TcxDBTreeListNode(AList.Last).KeyValue;
|
|
end;
|
|
finally
|
|
AList.Free;
|
|
end;
|
|
if VarType(Result) in [varSmallint, varInteger, varSingle, varDouble, varCurrency] then
|
|
Result := Result + 1 + Delta
|
|
else
|
|
Result := 0;
|
|
except
|
|
Result := Null;
|
|
end;
|
|
end;
|
|
|
|
function TcxDBTreeListDataController.IsDataMode: Boolean;
|
|
begin
|
|
Result := True;
|
|
end;
|
|
|
|
function TcxDBTreeListDataController.IsSmartLoad: Boolean;
|
|
begin
|
|
Result := TreeList.OptionsData.SmartLoad;
|
|
end;
|
|
|
|
procedure TcxDBTreeListDataController.PostRecord;
|
|
begin
|
|
if (DataSet.State in dsEditModes) and not UpdateEditing then
|
|
DataSet.Post;
|
|
end;
|
|
|
|
procedure TcxDBTreeListDataController.PostValues;
|
|
begin
|
|
end;
|
|
|
|
procedure TcxDBTreeListDataController.SetFieldName(
|
|
var AField: string; const AValue: string);
|
|
begin
|
|
if AField <> AValue then
|
|
begin
|
|
AField := AValue;
|
|
TreeList.FullRefresh;
|
|
end;
|
|
end;
|
|
|
|
procedure TcxDBTreeListDataController.SetNodeParentValue(
|
|
ANode: TcxDBTreeListNode; const AValue: Variant);
|
|
begin
|
|
if DataSet.Locate(KeyField, ANode.KeyValue, []) then
|
|
begin
|
|
DataSet.Edit;
|
|
ANode.ParentKeyValue := AValue;
|
|
SetFieldValue(DBParentField, AValue);
|
|
DataSet.Post;
|
|
if TreeList.OptionsData.SmartRefresh then
|
|
Load(ANode);
|
|
end;
|
|
end;
|
|
|
|
procedure TcxDBTreeListDataController.SyncFocused(ANode: TcxTreeListNode);
|
|
begin
|
|
if not CanLocateByNode(TcxDBTreeListNode(TreeList.Controller.PrevFocusedNode), TcxDBTreeListNode(ANode)) then Exit;
|
|
try
|
|
CheckBrowseMode;
|
|
LocateByKey((ANode as TcxDBTreeListNode).KeyValue);
|
|
finally
|
|
TreeList.DataLocate := False;
|
|
TreeList.DataBusy := False;
|
|
end;
|
|
end;
|
|
|
|
procedure TcxDBTreeListDataController.UpdateActive;
|
|
begin
|
|
if not (Datalink.Active and Datalink.DataSet.Active) or TreeList.IsLoading then Exit;
|
|
TreeList.FindNodeById;
|
|
TreeList.UpdateData;
|
|
end;
|
|
|
|
procedure TcxDBTreeListDataController.UpdateFocused;
|
|
var
|
|
ANode: TcxTreeListNode;
|
|
begin
|
|
ANode := TreeList.FindLoadedNodeByKeyValue(GetFieldValue(DBKeyField));
|
|
if TreeList.UpdatingNode <> nil then
|
|
ANode := TreeList.UpdatingNode;
|
|
if ANode <> nil then
|
|
ANode.Focused := True;
|
|
end;
|
|
|
|
function TcxDBTreeListDataController.GetDataSet: TDataSet;
|
|
begin
|
|
if DataSource <> nil then
|
|
Result := DataSource.DataSet
|
|
else
|
|
Result := nil;
|
|
end;
|
|
|
|
function TcxDBTreeListDataController.GetDataSource: TDataSource;
|
|
begin
|
|
Result := DataLink.DataSource;
|
|
end;
|
|
|
|
function TcxDBTreeListDataController.GetTreeList: TcxCustomDBTreeList;
|
|
begin
|
|
Result := TcxCustomDBTreeList(GetOwner)
|
|
end;
|
|
|
|
procedure TcxDBTreeListDataController.SetDataSource(AValue: TDataSource);
|
|
begin
|
|
DataLink.DataSource := AValue;
|
|
TreeList.DataChanged;
|
|
end;
|
|
|
|
procedure TcxDBTreeListDataController.SetImageIndexFieldName(
|
|
const AValue: string);
|
|
begin
|
|
SetFieldName(FImageIndexFieldName, AValue);
|
|
end;
|
|
|
|
procedure TcxDBTreeListDataController.SetKeyFieldName(const AValue: string);
|
|
begin
|
|
SetFieldName(FKeyFieldName, AValue);
|
|
end;
|
|
|
|
procedure TcxDBTreeListDataController.SetParentKeyFieldName(
|
|
const AValue: string);
|
|
begin
|
|
SetFieldName(FParentKeyFieldName, AValue);
|
|
end;
|
|
|
|
procedure TcxDBTreeListDataController.SetStateIndexFieldName(
|
|
const AValue: string);
|
|
begin
|
|
SetFieldName(FStateIndexFieldName, AValue);
|
|
end;
|
|
|
|
{ TcxDBTreeListDefaultValuesProvider }
|
|
|
|
function TcxDBTreeListDefaultValuesProvider.IsDisplayFormatDefined(
|
|
AIsCurrencyValueAccepted: Boolean): Boolean;
|
|
begin
|
|
Result := TcxDBItemDataBinding(Owner).IsDisplayFormatDefined(AIsCurrencyValueAccepted);
|
|
end;
|
|
|
|
{ TcxDBItemDataBinding }
|
|
|
|
procedure TcxDBItemDataBinding.Assign(Source: TPersistent);
|
|
begin
|
|
if Source is TcxDBItemDataBinding then
|
|
FieldName := TcxDBItemDataBinding(Source).FieldName
|
|
else
|
|
inherited Assign(Source);
|
|
end;
|
|
|
|
procedure TcxDBItemDataBinding.Changed;
|
|
begin
|
|
TreeList.AddDataChanges([dtcStructure]);
|
|
TreeList.LayoutChanged;
|
|
end;
|
|
|
|
function TcxDBItemDataBinding.DefaultRepositoryItem: TcxEditRepositoryItem;
|
|
begin
|
|
Result := GetDefaultEditDBRepositoryItems.GetItemByField(Field);
|
|
end;
|
|
|
|
function TcxDBItemDataBinding.GetDefaultCaption: string;
|
|
begin
|
|
if Field <> nil then
|
|
Result := Field.DisplayName
|
|
else
|
|
Result := FieldName;
|
|
end;
|
|
|
|
function TcxDBItemDataBinding.GetDefaultValuesProviderClass: TcxCustomEditDefaultValuesProviderClass;
|
|
begin
|
|
Result := TcxDBTreeListDefaultValuesProvider;
|
|
end;
|
|
|
|
function TcxDBItemDataBinding.GetValueTypeClass: TcxValueTypeClass;
|
|
begin
|
|
Result := GetValueTypeClassByField(Field);
|
|
end;
|
|
|
|
procedure TcxDBItemDataBinding.Init;
|
|
begin
|
|
InitializeField;
|
|
DefaultValuesProvider.DataSource := DataController.DataSource;
|
|
if DefaultValuesProvider.Field <> Field then
|
|
begin
|
|
DefaultValuesProvider.Field := Field;
|
|
ValueTypeClassChanged;
|
|
end;
|
|
inherited Init;
|
|
end;
|
|
|
|
procedure TcxDBItemDataBinding.InitializeField;
|
|
begin
|
|
FField := nil;
|
|
if (DataController.DataSet <> nil) {and DataController.DataLink.Active} then
|
|
FField := DataController.DataSet.FindField(FieldName)
|
|
end;
|
|
|
|
function TcxDBItemDataBinding._AddRef: Integer;
|
|
begin
|
|
Result := -1;
|
|
end;
|
|
|
|
function TcxDBItemDataBinding._Release: Integer;
|
|
begin
|
|
Result := -1;
|
|
end;
|
|
|
|
function TcxDBItemDataBinding.QueryInterface(
|
|
const IID: TGUID; out Obj): HResult;
|
|
begin
|
|
if GetInterface(IID, Obj) then
|
|
Result := 0
|
|
else
|
|
Result := cxE_NOINTERFACE;
|
|
end;
|
|
|
|
function TcxDBItemDataBinding.GetDataController: TcxDBTreeListDataController;
|
|
begin
|
|
Result := TcxDBTreeListDataController(inherited DataController);
|
|
end;
|
|
|
|
function TcxDBItemDataBinding.GetDefaultValuesProviderProperty: TcxDBTreeListDefaultValuesProvider;
|
|
begin
|
|
Result := inherited DefaultValuesProvider as TcxDBTreeListDefaultValuesProvider;
|
|
end;
|
|
|
|
function TcxDBItemDataBinding.GetFieldName: string;
|
|
begin
|
|
if Field <> nil then
|
|
Result := Field.FieldName
|
|
else
|
|
Result := FFieldName;
|
|
FFieldName := Result;
|
|
end;
|
|
|
|
function TcxDBItemDataBinding.GetTreeList: TcxCustomDBTreeList;
|
|
begin
|
|
Result := DataController.TreeList;
|
|
end;
|
|
|
|
procedure TcxDBItemDataBinding.SetFieldName(const AValue: string);
|
|
begin
|
|
if AValue <> FieldName then
|
|
begin
|
|
FFieldName := AValue;
|
|
Changed;
|
|
end;
|
|
end;
|
|
|
|
{ TcxDBTreeListOptionsData }
|
|
|
|
constructor TcxDBTreeListOptionsData.Create(AOwner: TPersistent);
|
|
begin
|
|
inherited Create(AOwner);
|
|
FSyncMode := True;
|
|
end;
|
|
|
|
procedure TcxDBTreeListOptionsData.Assign(Source: TPersistent);
|
|
begin
|
|
if Source is TcxDBTreeListOptionsData then
|
|
begin
|
|
AutoCalcKeyValue := TcxDBTreeListOptionsData(Source).AutoCalcKeyValue;
|
|
SmartRefresh := TcxDBTreeListOptionsData(Source).SmartRefresh;
|
|
SyncMode := TcxDBTreeListOptionsData(Source).SyncMode;
|
|
end;
|
|
inherited Assign(Source);
|
|
end;
|
|
|
|
function TcxDBTreeListOptionsData.GetTreeList: TcxCustomDBTreeList;
|
|
begin
|
|
Result := GetOwner as TcxCustomDBTreeList
|
|
end;
|
|
|
|
procedure TcxDBTreeListOptionsData.SetSmartRefresh(AValue: Boolean);
|
|
begin
|
|
if SmartRefresh <> AValue then
|
|
begin
|
|
FSmartRefresh := AValue;
|
|
TreeList.DataModeChanged;
|
|
end;
|
|
end;
|
|
|
|
procedure TcxDBTreeListOptionsData.SetSyncMode(AValue: Boolean);
|
|
begin
|
|
if SyncMode <> AValue then
|
|
begin
|
|
FSyncMode := AValue;
|
|
TreeList.DataModeChanged;
|
|
end;
|
|
end;
|
|
|
|
{ TcxDBTreeListColumn }
|
|
|
|
procedure TcxDBTreeListColumn.AssignValueFromField(ANode: TcxTreeListNode);
|
|
var
|
|
AText: string;
|
|
begin
|
|
AText := '';
|
|
if Field <> nil then
|
|
begin
|
|
DataController.SetNodeValue(ANode, ItemIndex, GetFieldValue(Field));
|
|
if IsTextStored then
|
|
AText := Field.DisplayText;
|
|
end
|
|
else
|
|
DataController.SetNodeValue(ANode, ItemIndex, Null);
|
|
if IsTextStored then
|
|
TcxDataStorageHelper.SetDisplayText(TcxDBTreeListNode(ANode).Handle, ValueDef, AText);
|
|
end;
|
|
|
|
function TcxDBTreeListColumn.GetDataBindingClass: TcxItemDataBindingClass;
|
|
begin
|
|
Result := TcxDBItemDataBinding;
|
|
end;
|
|
|
|
function TcxDBTreeListColumn.GetEditValue: Variant;
|
|
var
|
|
AEditValueSource: TcxDataEditValueSource;
|
|
begin
|
|
Result := Null;
|
|
if Assigned(Field) then
|
|
begin
|
|
AEditValueSource := PropertiesValue.GetEditValueSource(False);
|
|
if AEditValueSource = evsText then
|
|
begin
|
|
if Field.IsNull and not Assigned(Field.OnGetText) then
|
|
Result := Null
|
|
else
|
|
Result := Field.Text;
|
|
end
|
|
else
|
|
if (AEditValueSource = evsKey) and (Field.KeyFields <> '') then
|
|
Result := Field.DataSet.FieldValues[Field.KeyFields]
|
|
else
|
|
if not Field.IsNull then
|
|
Result := Field.Value; // evsValue
|
|
end
|
|
else
|
|
Result := inherited GetEditValue;
|
|
end;
|
|
|
|
function TcxDBTreeListColumn.GetIsCurrency: Boolean;
|
|
begin
|
|
Result := (Field <> nil) and IsSimpleCurrencyField(Field);
|
|
end;
|
|
|
|
function TcxDBTreeListColumn.GetIsTextStored: Boolean;
|
|
begin
|
|
Result := (Field <> nil) and IsFieldFormatted(Field,
|
|
DataController.GetItemValueSource(ItemIndex) = evsText);
|
|
end;
|
|
|
|
function TcxDBTreeListColumn.GetDataBinding: TcxDBItemDataBinding;
|
|
begin
|
|
Result := TcxDBItemDataBinding(inherited DataBinding);
|
|
end;
|
|
|
|
function TcxDBTreeListColumn.GetField: TField;
|
|
begin
|
|
Result := DataBinding.Field;
|
|
end;
|
|
|
|
procedure TcxDBTreeListColumn.SetDataBinding(Value: TcxDBItemDataBinding);
|
|
begin
|
|
DataBinding.Assign(Value);
|
|
end;
|
|
|
|
{ TcxDBTreeListLoader }
|
|
|
|
constructor TcxDBTreeListLoader.Create(AOwner: TcxDataTreeListDataController);
|
|
begin
|
|
inherited Create(AOwner);
|
|
HasChildren := TList.Create;
|
|
Loaded := TList.Create;
|
|
end;
|
|
|
|
destructor TcxDBTreeListLoader.Destroy;
|
|
begin
|
|
HasChildren.Free;
|
|
Loaded.Free;
|
|
inherited Destroy;
|
|
end;
|
|
|
|
procedure TcxDBTreeListLoader.Load(ANode: TcxTreeListNode);
|
|
begin
|
|
TreeList.DataBusy := True;
|
|
try
|
|
Loaded.Clear;
|
|
HasChildren.Clear;
|
|
Loaded.Count := TreeList.AbsoluteItemsList.Count;
|
|
Move(TreeList.AbsoluteItemsList.List^, Loaded.List^, Loaded.Count * SizeOf(Pointer));
|
|
Loaded.Sort(@cxCompareByKeyValue);
|
|
if ANode = nil then
|
|
Nodes := CloneList(Loaded);
|
|
try
|
|
DataSet.DisableControls;
|
|
try
|
|
inherited Load(ANode);
|
|
finally
|
|
DataSet.EnableControls;
|
|
if Nodes <> nil then
|
|
begin
|
|
Nodes.Sort(@cxCompareByParentKey);
|
|
InternalDelete(Nodes);
|
|
end;
|
|
end;
|
|
finally
|
|
FreeAndNil(Nodes);
|
|
end;
|
|
finally
|
|
TreeList.DataBusy := False;
|
|
end;
|
|
TreeList.FindNodeById;
|
|
end;
|
|
|
|
procedure TcxDBTreeListLoader.AssignValues(ANode: TcxTreeListNode);
|
|
var
|
|
I: Integer;
|
|
APrevIsChanged: Boolean;
|
|
begin
|
|
TreeList.IsRefreshValues := True;
|
|
try
|
|
APrevIsChanged := DataController.IsValueChanged;
|
|
inherited AssignValues(ANode);
|
|
for I := 0 to TreeList.ColumnCount - 1 do
|
|
TcxDBTreeListColumn(TreeList.Columns[I]).AssignValueFromField(ANode);
|
|
with DataController do
|
|
begin
|
|
if Assigned(DBImageIndexField) then
|
|
TcxDBTreeListNode(ANode).FImageIndexes[tlitImageIndex] := GetImageIndexAsInteger(DBImageIndexField);
|
|
if Assigned(DBStateIndexField) then
|
|
TcxDBTreeListNode(ANode).FImageIndexes[tlitStateIndex] := GetImageIndexAsInteger(DBStateIndexField);
|
|
end;
|
|
TcxDBTreeListNode(ANode).KeyValue := GetFieldValue(KeyField);
|
|
TcxDBTreeListNode(ANode).ParentKeyValue := GetFieldValue(ParentKeyField);
|
|
DataController.IsValueChanged := APrevIsChanged or (not ANode.Inserting and (DataSet.State in dsEditModes));
|
|
finally
|
|
TreeList.IsRefreshValues := False;
|
|
end;
|
|
end;
|
|
|
|
procedure TcxDBTreeListLoader.DoLoad(ALoadingNode: TcxTreeListNode);
|
|
var
|
|
I, AIndex: Integer;
|
|
ANode, APrev: TcxDBTreeListNode;
|
|
AKeyValue, AParentKeyValue: Variant;
|
|
begin
|
|
TreeList.ClearSelection;
|
|
if IsLoadAllRecords then
|
|
begin
|
|
// Load From DataSet
|
|
for I := 0 to Loaded.Count - 1 do
|
|
TcxDBTreeListNode(Loaded[I]).SaveStateBeforeRefresh;
|
|
DataSet.First;
|
|
while not DataSet.EOF do
|
|
begin
|
|
LoadValues(GetFieldValue(KeyField), GetFieldValue(ParentKeyField));
|
|
DataSet.Next;
|
|
end;
|
|
// Correct Parent
|
|
for I := 0 to Nodes.Count - 1 do
|
|
Include(TcxDBTreeListNode(Nodes[I]).State, nsDeleting);
|
|
ANode := TcxDBTreeListNode(Root.GetLastChild);
|
|
while ANode <> nil do
|
|
begin
|
|
APrev := TcxDBTreeListNode(ANode.GetPrevSibling);
|
|
if not ANode.Deleting and FindLoadedNode(ANode.ParentKeyValue, AIndex) and
|
|
ANode.CanMove(TcxTreeListNode(Loaded.List^[AIndex]), tlamAddChildFirst) then
|
|
InternalMove(ANode, TcxTreeListNode(Loaded.List^[AIndex]), tlamAddChildFirst);
|
|
ANode := APrev;
|
|
end;
|
|
for I := 0 to Loaded.Count - 1 do
|
|
TcxDBTreeListNode(Loaded[I]).RestoreStateAfterRefresh;
|
|
end
|
|
else
|
|
if ALoadingNode = nil then
|
|
begin
|
|
AKeyValue := GetFieldValue(KeyField);
|
|
AParentKeyValue := GetFieldValue(ParentKeyField);
|
|
LoadLevel(nil, TreeList.RootValue, nil);
|
|
// check FocusedNode
|
|
Loaded.Sort(@cxCompareByKeyValue);
|
|
if (KeyField <> ParentKeyField) and IsExistKeyRoot(AParentKeyValue) and
|
|
not FindLoadedNode(AKeyValue, I) then
|
|
LoadLevelBack(AParentKeyValue);
|
|
end
|
|
else
|
|
LoadLevel(TcxDBTreeListNode(ALoadingNode), TcxDBTreeListNode(ALoadingNode).KeyValue, nil);
|
|
end;
|
|
|
|
function TcxDBTreeListLoader.FindLoadedNode(
|
|
const AParentValue: Variant; var AIndex: Integer): Boolean;
|
|
var
|
|
L, H, I, C: Integer;
|
|
begin
|
|
Result := False;
|
|
L := 0;
|
|
H := Loaded.Count - 1;
|
|
while L <= H do
|
|
begin
|
|
I := (L + H) shr 1;
|
|
C := VarCompare(TcxDBTreeListNode(Loaded.List^[I]).KeyValue, AParentValue);
|
|
if C < 0 then
|
|
L := I + 1
|
|
else
|
|
begin
|
|
H := I - 1;
|
|
if C = 0 then
|
|
begin
|
|
Result := True;
|
|
L := I;
|
|
end;
|
|
end;
|
|
end;
|
|
AIndex := L;
|
|
end;
|
|
|
|
function TcxDBTreeListLoader.FindNode(var ANode: TcxDBTreeListNode;
|
|
const AValue: Variant): Boolean;
|
|
var
|
|
L, H, I, C: Integer;
|
|
begin
|
|
Result := False;
|
|
if Nodes = nil then Exit;
|
|
L := 0;
|
|
H := Nodes.Count - 1;
|
|
while L <= H do
|
|
begin
|
|
I := (L + H) shr 1;
|
|
try
|
|
ANode := TcxDBTreeListNode(Nodes.List^[I]);
|
|
C := VarCompare(ANode.KeyValue, AValue);
|
|
if C = 0 then
|
|
begin
|
|
Nodes.Delete(I);
|
|
Result := True;
|
|
Break;
|
|
end
|
|
else
|
|
if C < 0 then
|
|
L := I + 1
|
|
else
|
|
H := I - 1;
|
|
except
|
|
Result := False; // Variant Error
|
|
Break;
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
function TcxDBTreeListLoader.GetImageIndex(
|
|
ANode: TcxTreeListNode; AIndexType: TcxTreeListImageIndexType): Integer;
|
|
begin
|
|
Result := -1;
|
|
end;
|
|
|
|
function TcxDBTreeListLoader.GetImageIndexAsInteger(AField: TField): Integer;
|
|
begin
|
|
if AField = nil then
|
|
Result := -1
|
|
else
|
|
try
|
|
Result := AField.Value
|
|
except
|
|
on EVariantError do Result := -1;
|
|
end;
|
|
end;
|
|
|
|
function TcxDBTreeListLoader.IsChildrenExist(ANode: TcxTreeListNode): Boolean;
|
|
begin
|
|
Result := not TreeList.OptionsData.CheckHasChildren or
|
|
DataSet.Locate(ParentKeyFieldName, TcxDBTreeListNode(ANode).KeyValue, []);
|
|
end;
|
|
|
|
function TcxDBTreeListLoader.IsExistKeyRoot(AParentValue: Variant): Boolean;
|
|
var
|
|
ARootValue: Variant;
|
|
begin
|
|
Result := False;
|
|
ARootValue := TreeList.RootValue;
|
|
repeat
|
|
if AParentValue = ARootValue then
|
|
begin
|
|
Result := True;
|
|
Break;
|
|
end;
|
|
if not DataSet.Locate(KeyFieldName, AParentValue, []) or
|
|
(GetFieldValue(KeyField) = GetFieldValue(ParentKeyField)) then Break;
|
|
AParentValue := GetFieldValue(ParentKeyField);
|
|
until False;
|
|
end;
|
|
|
|
procedure TcxDBTreeListLoader.LoadLevel(ANode: TcxDBTreeListNode;
|
|
const AParentValue: Variant; ANewNodes: TList);
|
|
var
|
|
I: Integer;
|
|
AList: TList;
|
|
AItem: TcxDBTreeListNode;
|
|
begin
|
|
if not DataSet.Locate(ParentKeyFieldName, AParentValue, []) then Exit;
|
|
AList := TList.Create;
|
|
try
|
|
while not DataSet.EOF and (GetFieldValue(ParentKeyField) = AParentValue) do
|
|
begin
|
|
AItem := LoadValues(AParentValue, GetFieldValue(KeyField));
|
|
if ANewNodes <> nil then ANewNodes.Add(AItem);
|
|
if ANode = nil then AList.Add(AItem);
|
|
DataSet.Next;
|
|
end;
|
|
if ANode = nil then
|
|
begin
|
|
for I := 0 to AList.Count - 1 do
|
|
begin
|
|
AItem := TcxDBTreeListNode(AList[I]);
|
|
if AItem.Expanded then
|
|
LoadLevel(AItem, AItem.KeyValue, nil)
|
|
else
|
|
if IsChildrenExist(AItem) then HasChildren.Add(AItem);
|
|
end;
|
|
end
|
|
else
|
|
begin
|
|
ANode := TcxDBTreeListNode(ANode.GetFirstChild);
|
|
while ANode <> nil do
|
|
begin
|
|
if ANode.Expanded then
|
|
LoadLevel(ANode, ANode.KeyValue, nil)
|
|
else
|
|
if IsChildrenExist(ANode) then HasChildren.Add(ANode);
|
|
ANode := TcxDBTreeListNode(ANode.GetNextSibling);
|
|
end;
|
|
end;
|
|
finally
|
|
for I := 0 to HasChildren.Count - 1 do
|
|
TcxDBTreeListNode(HasChildren[I]).HasChildren := True;
|
|
HasChildren.Clear;
|
|
AList.Free;
|
|
end;
|
|
end;
|
|
|
|
procedure TcxDBTreeListLoader.LoadLevelBack(AParentValue: Variant);
|
|
var
|
|
I, AIndex: Integer;
|
|
ANewNodes: TList;
|
|
ANode: TcxDBTreeListNode;
|
|
begin
|
|
ANewNodes := TList.Create;
|
|
try
|
|
repeat
|
|
if FindLoadedNode(AParentValue, I) then
|
|
begin
|
|
LoadLevel(TcxDBTreeListNode(Loaded.List^[I]), AParentValue, nil);
|
|
Break;
|
|
end
|
|
else
|
|
begin
|
|
LoadLevel(nil, AParentValue, ANewNodes);
|
|
if not DataSet.Locate(KeyFieldName, AParentValue, []) then Break;
|
|
AParentValue := GetFieldValue(ParentKeyField);
|
|
end;
|
|
until False;
|
|
// Correct Parent
|
|
for I := 0 to ANewNodes.Count - 1 do
|
|
begin
|
|
ANode := TcxDBTreeListNode(ANewNodes.List^[I]);
|
|
if FindLoadedNode(ANode.ParentKeyValue, AIndex) and
|
|
ANode.CanMove(TcxDBTreeListNode(Loaded.List^[I]), tlamAddChild) then
|
|
InternalMove(ANode, Loaded[AIndex], tlamAddChild);
|
|
end;
|
|
finally
|
|
FreeAndNil(ANewNodes);
|
|
end;
|
|
end;
|
|
|
|
function TcxDBTreeListLoader.LoadValues(
|
|
const AKeyValue, AParentKeyValue: Variant): TcxDBTreeListNode;
|
|
var
|
|
I: Integer;
|
|
AFound: Boolean;
|
|
begin
|
|
Result := nil;
|
|
AFound := FindNode(Result, AKeyValue);
|
|
if AFound then
|
|
begin
|
|
if ((Result.ParentKeyValue <> AParentKeyValue) or
|
|
((Result.Parent <> Root) and (TcxDBTreeListNode(Result.Parent).KeyValue <> AParentKeyValue))) and
|
|
FindLoadedNode(AParentKeyValue, I) and Result.CanMove(TcxTreeListNode(Loaded.List^[I]), tlamAddChild) then
|
|
InternalMove(Result, TcxTreeListNode(Loaded.List^[I]), tlamAddChild)
|
|
else
|
|
InternalMove(Result, Root, tlamAdd);
|
|
end
|
|
else
|
|
begin
|
|
if FindLoadedNode(AKeyValue, I) then
|
|
Result := TcxDBTreeListNode(TcxTreeListNode(Loaded.List^[I]).AddChild)
|
|
else
|
|
Result := TcxDBTreeListNode(TreeList.Root.AddChild);
|
|
end;
|
|
AssignValues(Result);
|
|
Result.ParentKeyValue := AParentKeyValue;
|
|
Exclude(Result.State, nsInserting);
|
|
if not AFound and not FindLoadedNode(Result.KeyValue, I) then
|
|
Loaded.Insert(I, Result);
|
|
end;
|
|
|
|
procedure TcxDBTreeListLoader.SavePos;
|
|
begin
|
|
inherited SavePos;
|
|
FDataSetBookmark := cxDataSetCreateBookMark(DataSet);
|
|
end;
|
|
|
|
procedure TcxDBTreeListLoader.RestorePos;
|
|
begin
|
|
inherited RestorePos;
|
|
cxDataSetRestoreBookmark(DataSet, TDataSetBookmark(FDataSetBookmark));
|
|
end;
|
|
|
|
function TcxDBTreeListLoader.GetDataController: TcxDBTreeListDataController;
|
|
begin
|
|
Result := TcxDBTreeListDataController(inherited DataController);
|
|
end;
|
|
|
|
function TcxDBTreeListLoader.GetDataSet: TDataSet;
|
|
begin
|
|
Result := DataController.DataSet;
|
|
end;
|
|
|
|
function TcxDBTreeListLoader.GetTreeList: TcxCustomDBTreeList;
|
|
begin
|
|
Result := TcxCustomDBTreeList(inherited TreeList);
|
|
end;
|
|
|
|
function TcxDBTreeListLoader.GetKeyField: TField;
|
|
begin
|
|
Result := DataController.DBKeyField;
|
|
end;
|
|
|
|
function TcxDBTreeListLoader.GetKeyFieldName: string;
|
|
begin
|
|
Result := DataController.KeyField;
|
|
end;
|
|
|
|
function TcxDBTreeListLoader.GetParentKeyField: TField;
|
|
begin
|
|
Result := DataController.DBParentField;
|
|
end;
|
|
|
|
function TcxDBTreeListLoader.GetParentKeyFieldName: string;
|
|
begin
|
|
Result := DataController.ParentField;
|
|
end;
|
|
|
|
{ TcxCustomDBTreeList }
|
|
|
|
constructor TcxCustomDBTreeList.Create(AOwner: TComponent);
|
|
begin
|
|
inherited Create(AOwner);
|
|
FRootValue := Integer(-1);
|
|
end;
|
|
|
|
destructor TcxCustomDBTreeList.Destroy;
|
|
begin
|
|
BeginUpdate;
|
|
DataController.DataSource := nil;
|
|
inherited Destroy;
|
|
end;
|
|
|
|
procedure TcxCustomDBTreeList.Assign(Source: TPersistent);
|
|
begin
|
|
inherited Assign(Source);
|
|
if Source is TcxCustomDBTreeList then
|
|
FRootValue := TcxCustomDBTreeList(Source).FRootValue;
|
|
end;
|
|
|
|
function TcxCustomDBTreeList.FindNodeByKeyValue(
|
|
const AKeyValue: Variant; AStartNode: TcxTreeListNode = nil;
|
|
AExpandedOnly: Boolean = False; AForward: Boolean = True): TcxDBTreeListNode;
|
|
begin
|
|
Result := Find(@AKeyValue, AStartNode, AExpandedOnly,
|
|
AForward, TcxTreeListFindFunc(@cxFindKey)) as TcxDBTreeListNode;
|
|
end;
|
|
|
|
procedure TcxCustomDBTreeList.AssignData(ASource: TcxCustomTreeList);
|
|
begin
|
|
inherited AssignData(ASource);
|
|
if ASource is TcxCustomDBTreeList then
|
|
DataController.DataSource := TcxCustomDBTreeList(ASource).DataController.DataSource;
|
|
end;
|
|
|
|
procedure TcxCustomDBTreeList.CreateAllItems;
|
|
begin
|
|
DataController.CreateAllItems;
|
|
end;
|
|
|
|
function TcxCustomDBTreeList.CreateNode: TcxTreeListNode;
|
|
begin
|
|
Result := TcxDBTreeListNode.Create(Self);
|
|
end;
|
|
|
|
procedure TcxCustomDBTreeList.DataChanged;
|
|
begin
|
|
if DataController <> nil then
|
|
DataController.UpdateInternalFields;
|
|
inherited DataChanged;
|
|
end;
|
|
|
|
procedure TcxCustomDBTreeList.DataModeChanged;
|
|
begin
|
|
if OptionsData.SmartLoad then
|
|
OptionsData.SmartRefresh := False;
|
|
inherited DataModeChanged;
|
|
end;
|
|
|
|
procedure TcxCustomDBTreeList.DoClear;
|
|
begin
|
|
InternalClearAll;
|
|
end;
|
|
|
|
procedure TcxCustomDBTreeList.DoDeleteNode(ANode: TcxTreeListNode);
|
|
begin
|
|
if ANode = UpdatingNode then
|
|
FUpdatingNode := nil;
|
|
inherited DoDeleteNode(ANode);
|
|
end;
|
|
|
|
procedure TcxCustomDBTreeList.DeleteNodes(AList: TList);
|
|
begin
|
|
DataSet.DisableControls;
|
|
try
|
|
inherited DeleteNodes(AList);
|
|
finally
|
|
DataSet.EnableControls;
|
|
end;
|
|
end;
|
|
|
|
function TcxCustomDBTreeList.DoInitInsertingNode(
|
|
ANode: TcxDBTreeListNode): Boolean;
|
|
begin
|
|
Result := False;
|
|
// todo:
|
|
if (ANode <> nil) and (ANode <> Root) then
|
|
begin
|
|
{ if ANode.Parent <> Root then
|
|
ANode := TcxDBTreeListNode(ANode.Parent)}
|
|
end
|
|
else
|
|
ANode := nil;
|
|
//
|
|
if Assigned(FOnInitInsertingRecord) then
|
|
FOnInitInsertingRecord(Self, ANode, Result);
|
|
end;
|
|
|
|
procedure TcxCustomDBTreeList.DoMoveTo(AttachNode: TcxTreeListNode;
|
|
AttachMode: TcxTreeListNodeAttachMode; ANodes: TList; IsCopy: Boolean);
|
|
var
|
|
I: Integer;
|
|
NewParentValue: Variant;
|
|
begin
|
|
if AttachMode in [tlamAddChild, tlamAddChildFirst] then
|
|
NewParentValue := TcxDBTreeListNode(AttachNode).KeyValue
|
|
else
|
|
NewParentValue := TcxDBTreeListNode(AttachNode).ParentKeyValue;
|
|
if not IsCopy then
|
|
begin
|
|
inherited DoMoveTo(AttachNode, AttachMode, ANodes, IsCopy);
|
|
DataController.DataSet.DisableControls;
|
|
try
|
|
for I := 0 to ANodes.Count - 1 do
|
|
DataController.SetNodeParentValue(
|
|
TcxDBTreeListNode(ANodes.List^[I]), NewParentValue);
|
|
finally
|
|
DataController.DataSet.EnableControls;
|
|
end;
|
|
end
|
|
else
|
|
begin
|
|
BeginUpdate;
|
|
try
|
|
DataController.DoCopyTo(TcxDBTreeListNode(AttachNode), AttachMode, ANodes);
|
|
finally
|
|
EndUpdate;
|
|
end
|
|
end;
|
|
if OptionsData.SmartRefresh then
|
|
DataChanged;
|
|
end;
|
|
|
|
function TcxCustomDBTreeList.FindLoadedNodeByKeyValue(
|
|
const AValue: Variant): TcxDBTreeListNode;
|
|
var
|
|
I: Integer;
|
|
begin
|
|
Result := nil;
|
|
for I := 0 to AbsoluteItemsList.Count - 1 do
|
|
if VarEquals(TcxDBTreeListNode(AbsoluteItemsList[I]).KeyValue, AValue) then
|
|
begin
|
|
Result := TcxDBTreeListNode(AbsoluteItemsList[I]);
|
|
Break;
|
|
end;
|
|
end;
|
|
|
|
procedure TcxCustomDBTreeList.FindNodeById;
|
|
var
|
|
ANode: TcxDBTreeListNode;
|
|
begin
|
|
if DataLocate or DataBusy or DataController.IsKeyFieldsEmpty then Exit;
|
|
ANode := FindNodeByKeyValue(GetFieldValue(DataController.DBKeyField));
|
|
if ANode <> nil then
|
|
begin
|
|
Controller.Select(ANode, []);
|
|
ANode.MakeVisible;
|
|
end;
|
|
end;
|
|
|
|
function TcxCustomDBTreeList.GetDataControllerClass: TcxCustomDataControllerClass;
|
|
begin
|
|
Result := TcxDBTreeListDataController;
|
|
end;
|
|
|
|
function TcxCustomDBTreeList.GetOptionsDataClass: TcxControlOptionsDataClass;
|
|
begin
|
|
Result := TcxDBTreeListOptionsData;
|
|
end;
|
|
|
|
function TcxCustomDBTreeList.GetTreeListColumnClass: TcxTreeListColumnClass;
|
|
begin
|
|
Result := TcxDBTreeListColumn;
|
|
end;
|
|
|
|
procedure TcxCustomDBTreeList.InitializeFields;
|
|
var
|
|
I: Integer;
|
|
begin
|
|
DataController.UpdateInternalFields;
|
|
for I := 0 to ColumnCount - 1 do
|
|
TcxDBTreeListColumn(Columns[I]).DataBinding.InitializeField;
|
|
inherited InitializeFields;
|
|
end;
|
|
|
|
function TcxCustomDBTreeList.InsertNode(ARelative: TcxTreeListNode; IsAppend: Boolean): Boolean;
|
|
var
|
|
AParentKeyValue: Variant;
|
|
begin
|
|
Result := True;
|
|
HideEdit();
|
|
DataController.CheckBrowseMode;
|
|
DataSet.DisableControls;
|
|
try
|
|
AParentKeyValue := Null;
|
|
if not DataSet.Eof then
|
|
begin
|
|
if IsAppend then
|
|
AParentKeyValue := DataController.DBParentField.Value
|
|
else
|
|
AParentKeyValue := DataController.DBKeyField.Value;
|
|
end;
|
|
DataSet.Insert;
|
|
if not VarIsNull(AParentKeyValue) then
|
|
DataController.DBParentField.Value := AParentKeyValue;
|
|
finally
|
|
DataSet.EnableControls;
|
|
end;
|
|
ShowEdit;
|
|
end;
|
|
|
|
procedure TcxCustomDBTreeList.InternalInsertNode(IsAppend: Boolean);
|
|
var
|
|
ANode: TcxDBTreeListNode;
|
|
begin
|
|
if not IsDataSettingsValid then Exit;
|
|
InternalCreationAddRef;
|
|
try
|
|
if (FocusedNode <> nil) then
|
|
begin
|
|
if (FocusedNode.Parent <> nil) and IsAppend then
|
|
UpdatingNode := FocusedNode.Parent.AddChild as TcxDBTreeListNode
|
|
else
|
|
UpdatingNode := FocusedNode.AddChild as TcxDBTreeListNode;
|
|
end
|
|
else
|
|
UpdatingNode := Root.AddChild as TcxDBTreeListNode;
|
|
DataController.DoInitInsertingNode(UpdatingNode);
|
|
if not VarIsNull(UpdatingNode.ParentKeyValue) then
|
|
begin
|
|
ANode := FindNodeByKeyValue(UpdatingNode.ParentKeyValue);
|
|
if ANode <> nil then
|
|
UpdatingNode.MoveTo(ANode, tlamAddChild);
|
|
end
|
|
else
|
|
UpdatingNode.MoveTo(Root, tlamAddChild);
|
|
UpdatingNode.Focused := True;
|
|
UpdatingNode.MakeVisible;
|
|
DataController.UpdateEditing := True;
|
|
try
|
|
DataController.EditingNode := UpdatingNode;
|
|
DataController.IsValueChanged := False;
|
|
finally
|
|
DataController.UpdateEditing := False;
|
|
end;
|
|
ClearSelection;
|
|
finally
|
|
InternalCreationRelease;
|
|
end;
|
|
end;
|
|
|
|
function TcxCustomDBTreeList.IsAutoCalcKeyValue: Boolean;
|
|
begin
|
|
Result := OptionsData.AutoCalcKeyValue and not OptionsData.SmartLoad;
|
|
end;
|
|
|
|
function TcxCustomDBTreeList.IsDataSettingsValid: Boolean;
|
|
begin
|
|
Result := inherited IsDataSettingsValid and not IsLoading and not IsDestroying and
|
|
(DataController.DataSet <> nil) and DataController.DataSet.Active and
|
|
not DataController.IsKeyFieldsEmpty and not DataController.DataSet.ControlsDisabled;
|
|
end;
|
|
|
|
function TcxCustomDBTreeList.IsNodeInserting(ANode: TcxTreeListNode): Boolean;
|
|
begin
|
|
Result := (ANode <> nil) and DataController.DataLink.Active and (DataSet.State = dsInsert) and
|
|
(TcxDBTreeListNode(ANode).KeyValue = GetFieldValue(DataController.DBKeyField));
|
|
end;
|
|
|
|
function TcxCustomDBTreeList.IsTreeListLocked: Boolean;
|
|
begin
|
|
Result := inherited IsTreeListLocked or IsRefreshValues or IsRefresh;
|
|
end;
|
|
|
|
procedure TcxCustomDBTreeList.RefreshFields;
|
|
begin
|
|
IsRefreshFields := True;
|
|
try
|
|
DataController.UpdateInternalFields;
|
|
inherited RefreshFields;
|
|
finally
|
|
IsRefreshFields := False;
|
|
end;
|
|
end;
|
|
|
|
function TcxCustomDBTreeList.SupportCreateAllItems: Boolean;
|
|
begin
|
|
Result := True;
|
|
end;
|
|
|
|
procedure TcxCustomDBTreeList.UpdateFocusedNode(
|
|
AColumn: TcxTreeListColumn);
|
|
begin
|
|
DataController.UpdateFocused;
|
|
if (FocusedNode <> nil) then
|
|
begin
|
|
Loader.AssignValues(FocusedNode);
|
|
if DataSet.State in dsEditModes then
|
|
DataController.EditingNode := FocusedNode;
|
|
end;
|
|
inherited UpdateFocusedNode(AColumn);
|
|
end;
|
|
|
|
function TcxCustomDBTreeList.ExecuteAction(Action: TBasicAction): Boolean;
|
|
begin
|
|
Result := DataController.DataLink.ExecuteAction(Action);
|
|
end;
|
|
|
|
function TcxCustomDBTreeList.UpdateAction(Action: TBasicAction): Boolean;
|
|
begin
|
|
Result := DataController.DataLink.UpdateAction(Action);
|
|
end;
|
|
|
|
procedure TcxCustomDBTreeList.LoadListByNode(
|
|
ANode: TcxDBTreeListNode; AList: TList);
|
|
var
|
|
P: PVariant;
|
|
I: Integer;
|
|
begin
|
|
New(P);
|
|
P^ := ANode.KeyValue;
|
|
AList.Add(P);
|
|
for I := 0 to ANode.Count - 1 do
|
|
LoadListByNode(TcxDBTreeListNode(ANode[I]), AList);
|
|
end;
|
|
|
|
procedure TcxCustomDBTreeList.RefreshTree;
|
|
begin
|
|
FIsRefresh := True;
|
|
try
|
|
InitializeFields;
|
|
DataController.Load(nil);
|
|
ClearSelection();
|
|
FindNodeById;
|
|
finally
|
|
FIsRefresh := False;
|
|
end;
|
|
LayoutChanged;
|
|
end;
|
|
|
|
procedure TcxCustomDBTreeList.LoadListByID(
|
|
const AKeyValue: Variant; AList: TList);
|
|
var
|
|
P: PVariant;
|
|
ATempList: TList;
|
|
I: Integer;
|
|
begin
|
|
New(P);
|
|
P^ := AKeyValue;
|
|
AList.Add(P);
|
|
if not DataSet.Locate(DataController.ParentField, AKeyValue, []) then Exit;
|
|
ATempList := TList.Create;
|
|
try
|
|
while not DataSet.Eof and (GetFieldValue(DataController.DBParentField) = AKeyValue) do
|
|
begin
|
|
New(P);
|
|
P^ := GetFieldValue(DataController.DBKeyField);
|
|
ATempList.Add(P);
|
|
DataSet.Next;
|
|
end;
|
|
for I := 0 to ATempList.Count - 1 do
|
|
LoadListByID(PVariant(ATempList[I])^, AList);
|
|
finally
|
|
for I := 0 to ATempList.Count - 1 do
|
|
Dispose(ATempList[I]);
|
|
ATempList.Free;
|
|
end;
|
|
end;
|
|
|
|
function TcxCustomDBTreeList.GetDataController: TcxDBTreeListDataController;
|
|
begin
|
|
Result := TcxDBTreeListDataController(inherited DataController);
|
|
end;
|
|
|
|
function TcxCustomDBTreeList.GetDataSet: TDataSet;
|
|
begin
|
|
if (DataController = nil) or (DataController.DataSource = nil) then
|
|
Result := nil
|
|
else
|
|
Result := DataController.DataSource.DataSet;
|
|
end;
|
|
|
|
function TcxCustomDBTreeList.GetLoader: TcxDBTreeListLoader;
|
|
begin
|
|
Result := inherited Loader as TcxDBTreeListLoader;
|
|
end;
|
|
|
|
function TcxCustomDBTreeList.GetOptionsData: TcxDBTreeListOptionsData;
|
|
begin
|
|
Result := TcxDBTreeListOptionsData(inherited OptionsData);
|
|
end;
|
|
|
|
procedure TcxCustomDBTreeList.SetDataController(
|
|
AValue: TcxDBTreeListDataController);
|
|
begin
|
|
DataController.Assign(AValue);
|
|
end;
|
|
|
|
procedure TcxCustomDBTreeList.SetOptionsData(AValue: TcxDBTreeListOptionsData);
|
|
begin
|
|
OptionsData.Assign(AValue);
|
|
end;
|
|
|
|
procedure TcxCustomDBTreeList.SetRootValue(const AValue: Variant);
|
|
begin
|
|
FRootValue := AValue;
|
|
if OptionsData.SmartLoad then
|
|
DataChanged;
|
|
end;
|
|
|
|
initialization
|
|
DataLinks := TList.Create;
|
|
|
|
finalization
|
|
DataLinks.Free;
|
|
|
|
|
|
end.
|
|
|
|
|
|
|