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tony |
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(*
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* IBX For Lazarus (Firebird Express)
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*
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* The contents of this file are subject to the Initial Developer's
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* Public License Version 1.0 (the "License"); you may not use this
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* file except in compliance with the License. You may obtain a copy
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* of the License here:
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*
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* http://www.firebirdsql.org/index.php?op=doc&id=idpl
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing rights
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* and limitations under the License.
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*
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* The Initial Developer of the Original Code is Tony Whyman.
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*
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tony |
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* The Original Code is (C) 2015 Tony Whyman, MWA Software
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tony |
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* (http://www.mwasoftware.co.uk).
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*
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* All Rights Reserved.
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*
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* Contributor(s): ______________________________________.
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*
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*)
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unit IBTreeView;
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{$mode objfpc}{$H+}
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interface
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uses
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Classes, SysUtils, LResources, Forms, Controls, Graphics, Dialogs, ComCtrls,
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tony |
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DB, IBSQLParser, IBCustomDataSet;
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tony |
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type
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{
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TIBTreeView is intended to be a data aware descendent of TCustomTreeView and used to display
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hierarchically structured data in a natural manner. Nodes can be deleted, moved
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and added to the tree and each change is reflected in the underlying dataset. The
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Node text can similarly be edited.
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}
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TVariantArray = array of variant;
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TIBTreeView = class;
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{ TIBTreeViewDatalink }
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TIBTreeViewDatalink = class(TDataLink)
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private
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FOwner: TIBTreeView;
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protected
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procedure ActiveChanged; override;
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procedure DataSetChanged; 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(AOwner: TIBTreeView);
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end;
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tony |
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{ TIBTreeViewControlLink }
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TIBTreeViewControlLink = class(TIBControlLink)
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private
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FOwner: TIBTreeView;
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protected
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procedure UpdateSQL(Sender: TObject); override;
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procedure UpdateParams(Sender: TObject); override;
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public
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constructor Create(AOwner: TIBTreeView);
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end;
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tony |
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{ TIBTreeNode }
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TIBTreeNode = class(TTreeNode)
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private
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FKeyValue: variant;
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public
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tony |
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constructor Create(AnOwner: TTreeNodes); override;
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tony |
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procedure DeleteAll;
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property KeyValue: variant read FKeyValue;
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end;
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TIBTreeView = class(TCustomTreeView)
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private
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{ Private declarations }
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FDataLink: TIBTreeViewDatalink;
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FIBTreeViewControlLink: TIBTreeViewControlLink;
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tony |
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FHasChildField: string;
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tony |
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FImageIndexField: string;
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tony |
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FKeyField: string;
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tony |
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FSelectedIndexField: string;
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FTextField: string;
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FParentField: string;
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FExpandNode: TTreeNode;
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FNoAddNodeToDataset: boolean;
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FRelationName: string;
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FUpdateNode: TIBTreeNode;
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FModifiedNode: TIBTreeNode;
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FUpdating: boolean;
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FLocatingNode: boolean;
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FLastSelected: TVariantArray;
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procedure ActiveChanged(Sender: TObject);
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procedure AddNodes;
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procedure DataSetChanged(Sender: TObject);
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function GetDataSet: TDataSet;
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function GetDataSource: TDataSource;
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function GetRelationNameQualifier: string;
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function GetSelectedKeyValue: variant;
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tony |
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procedure IBControlLinkChanged;
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tony |
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procedure NodeMoved(Node: TTreeNode);
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procedure NodeUpdated(Node: TTreeNode);
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procedure RecordChanged(Sender: TObject; Field: TField);
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procedure SetHasChildField(AValue: string);
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tony |
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procedure SetImageIndexField(AValue: string);
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tony |
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procedure SetKeyField(AValue: string);
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tony |
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procedure SetSelectedIndexField(AValue: string);
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tony |
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procedure SetTextField(AValue: string);
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procedure SetDataSource(AValue: TDataSource);
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procedure SetParentField(AValue: string);
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function ScrollToNode(Node: TIBTreeNode): boolean;
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procedure UpdateData(Sender: TObject);
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procedure UpdateParams(Sender: TObject; Parser: TSelectSQLParser);
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procedure UpdateSQL(Sender: TObject; Parser: TSelectSQLParser);
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protected
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{ Protected declarations }
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procedure Added(Node: TTreeNode); override;
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procedure Delete(Node: TTreeNode); override;
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procedure Change(Node: TTreeNode); override;
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function CreateNode: TTreeNode; override;
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function CanEdit(Node: TTreeNode): Boolean; override;
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procedure Expand(Node: TTreeNode); override;
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procedure Loaded; override;
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procedure NodeChanged(Node: TTreeNode; ChangeEvent: TTreeNodeChangeReason); override;
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procedure Notification(AComponent: TComponent; Operation: TOperation); override;
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procedure Reinitialise;
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public
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{ Public declarations }
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constructor Create(TheComponent: TComponent); override;
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destructor Destroy; override;
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tony |
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function FindNode(KeyValuePath: TVariantArray; SelectNode: boolean): TIBTreeNode; overload;
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tony |
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function FindNode(KeyValue: variant): TIBTreeNode; overload;
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function GetNodePath(Node: TTreeNode): TVariantArray;
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property DataSet: TDataSet read GetDataSet;
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property SelectedKeyValue: variant read GetSelectedKeyValue;
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published
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{ Published declarations }
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property Align;
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property Anchors;
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property AutoExpand;
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property BorderSpacing;
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//property BiDiMode;
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property BackgroundColor;
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property BorderStyle;
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property BorderWidth;
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property Color;
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property Constraints;
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property TextField: string read FTextField write SetTextField;
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property DataSource: TDataSource read GetDataSource write SetDataSource;
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property DefaultItemHeight;
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property DragKind;
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property DragCursor;
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property DragMode;
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property Enabled;
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property ExpandSignColor;
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property ExpandSignType;
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property Font;
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property HideSelection;
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property HotTrack;
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property Images;
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property Indent;
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property HasChildField: string read FHasChildField write SetHasChildField;
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property ImageIndexField: string read FImageIndexField write SetImageIndexField;
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property SelectedIndexField: string read FSelectedIndexField write SetSelectedIndexField;
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property KeyField: string read FKeyField write SetKeyField;
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property MultiSelect;
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property MultiSelectStyle;
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//property ParentBiDiMode;
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property ParentColor default False;
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property ParentField: string read FParentField write SetParentField;
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property ParentFont;
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property ParentShowHint;
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property PopupMenu;
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property ReadOnly;
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property RelationName: string read FRelationName write FRelationName;
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property RightClickSelect;
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property RowSelect;
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property ScrollBars;
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property SelectionColor;
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property ShowButtons;
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property ShowHint;
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property ShowLines;
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property ShowRoot;
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property StateImages;
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property TabOrder;
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property TabStop default True;
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property Tag;
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property ToolTips;
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property Visible;
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property OnAddition;
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property OnAdvancedCustomDraw;
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property OnAdvancedCustomDrawItem;
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property OnChange;
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property OnChanging;
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property OnClick;
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property OnCollapsed;
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property OnCollapsing;
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property OnCompare;
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property OnContextPopup;
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property OnCreateNodeClass;
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property OnCustomCreateItem;
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property OnCustomDraw;
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property OnCustomDrawItem;
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property OnDblClick;
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property OnDeletion;
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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 OnEditingEnd;
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//property OnEndDock;
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property OnEndDrag;
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property OnEnter;
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property OnExit;
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property OnExpanded;
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property OnExpanding;
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property OnGetImageIndex;
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property OnGetSelectedIndex;
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property OnKeyDown;
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property OnKeyPress;
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property OnKeyUp;
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property OnMouseDown;
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property OnMouseEnter;
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property OnMouseLeave;
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property OnMouseMove;
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property OnMouseUp;
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property OnNodeChanged;
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property OnSelectionChanged;
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property OnShowHint;
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//property OnStartDock;
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property OnStartDrag;
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property OnUTF8KeyPress;
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property Options;
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property Items;
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property TreeLineColor;
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property TreeLinePenStyle;
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end;
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function StrIntListToVar(s: string): TVariantArray;
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function VarToStrIntList(a: TVariantArray): string;
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implementation
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tony |
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uses IBQuery,Variants;
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tony |
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function StrIntListToVar(s: string): TVariantArray;
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var i, idx: integer;
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List: TStringList;
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begin
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List := TStringList.Create;
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try
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idx := 1;
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List.Clear;
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while idx <= Length(s) do
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List.Add(ExtractFieldName(s,idx));
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Setlength(Result,List.Count);
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for i := 0 to List.Count - 1 do
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Result[i] := StrToInt(List[i])
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finally
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List.Free
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end;
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end;
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function VarToStrIntList(a: TVariantArray): string;
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var i: integer;
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begin
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for i := 0 to Length(a) - 1 do
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if VarIsOrdinal(a[i]) then
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begin
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if i = 0 then
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Result := IntToStr(a[i])
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else
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Result := Result + ';' + IntToStr(a[i])
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end
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else
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raise Exception.Create('Ordinal Type Expected when converting to integer string');
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end;
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tony |
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{ TIBTreeViewControlLink }
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constructor TIBTreeViewControlLink.Create(AOwner: TIBTreeView);
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begin
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inherited Create;
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FOwner := AOwner;
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end;
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procedure TIBTreeViewControlLink.UpdateParams(Sender: TObject);
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begin
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FOwner.UpdateParams(self,TIBParserDataSet(Sender).Parser)
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end;
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procedure TIBTreeViewControlLink.UpdateSQL(Sender: TObject);
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begin
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FOwner.UpdateSQL(self,TIBParserDataSet(Sender).Parser)
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end;
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tony |
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{ TIBTreeNode }
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tony |
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constructor TIBTreeNode.Create(AnOwner: TTreeNodes);
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begin
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inherited Create(AnOwner);
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FKeyValue := NULL;
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end;
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tony |
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procedure TIBTreeNode.DeleteAll;
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var Node, NextNode: TTreeNode;
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begin
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Expand(true);
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Node := GetFirstChild;
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while Node <> nil do
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begin
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NextNode := Node.GetNextSibling;
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TIBTreeNode(Node).DeleteAll;
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Node := NextNode;
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end;
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Delete
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end;
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{ TIBTreeView }
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procedure TIBTreeView.ActiveChanged(Sender: TObject);
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begin
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if (csDesigning in ComponentState) then Exit;
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tony |
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IBControlLinkChanged;
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tony |
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if assigned(DataSet) and not DataSet.Active then
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begin
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if not assigned(FExpandNode) and not assigned(FUpdateNode) then {must really be closing}
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Reinitialise
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end
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else
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begin
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AddNodes;
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if not FLocatingNode and (Selected = nil) and (Items.TopLvlCount > 0) then
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begin
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if Length(FLastSelected) > 0 then
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Selected := FindNode(FLastSelected,true)
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else
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Selected := Items.TopLvlItems[0];
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end
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end
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end;
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procedure TIBTreeView.AddNodes;
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var Node: TTreeNode;
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ChildCount: integer;
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begin
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if assigned(FExpandNode) or (Items.Count = 0) then
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begin
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ChildCount := 0;
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FNoAddNodeToDataset := true;
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try
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DataSet.First;
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while not DataSet.EOF do
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begin
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367 |
tony |
143 |
if (FExpandNode = nil) or (TIBTreeNode(FExpandNode).KeyValue <> DataSet.FieldByName(KeyField).AsVariant) then
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begin
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Node := Items.AddChild(FExpandNode,DataSet.FieldByName(TextField).AsString);
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Node.HasChildren := (HasChildField = '') or (DataSet.FieldByName(HasChildField).AsInteger <> 0);
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Inc(ChildCount);
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end;
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373 |
tony |
21 |
DataSet.Next
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end;
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finally
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FNoAddNodeToDataset := false
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|
end;
|
378 |
|
|
if assigned(FExpandNode) then
|
379 |
|
|
FExpandNode.HasChildren := ChildCount > 0;
|
380 |
|
|
FExpandNode := nil
|
381 |
|
|
end
|
382 |
|
|
end;
|
383 |
|
|
|
384 |
|
|
procedure TIBTreeView.DataSetChanged(Sender: TObject);
|
385 |
|
|
begin
|
386 |
tony |
143 |
// Do nothing;
|
387 |
tony |
21 |
end;
|
388 |
|
|
|
389 |
|
|
function TIBTreeView.GetDataSet: TDataSet;
|
390 |
|
|
begin
|
391 |
|
|
Result := FDataLink.DataSet
|
392 |
|
|
end;
|
393 |
|
|
|
394 |
|
|
function TIBTreeView.GetDataSource: TDataSource;
|
395 |
|
|
begin
|
396 |
|
|
Result := FDataLink.DataSource
|
397 |
|
|
end;
|
398 |
|
|
|
399 |
|
|
function TIBTreeView.GetRelationNameQualifier: string;
|
400 |
|
|
begin
|
401 |
|
|
if FRelationName <> '' then
|
402 |
|
|
Result := FRelationName + '.'
|
403 |
|
|
else
|
404 |
|
|
Result := ''
|
405 |
|
|
end;
|
406 |
|
|
|
407 |
|
|
function TIBTreeView.GetSelectedKeyValue: variant;
|
408 |
|
|
begin
|
409 |
|
|
Result := NULL;
|
410 |
|
|
if assigned(Selected) and (Selected is TIBTreeNode) then
|
411 |
|
|
Result := TIBTreeNode(Selected).KeyValue
|
412 |
|
|
end;
|
413 |
|
|
|
414 |
|
|
procedure TIBTreeView.NodeMoved(Node: TTreeNode);
|
415 |
|
|
begin
|
416 |
|
|
{Need to update Parent}
|
417 |
|
|
if ScrollToNode(TIBTreeNode(Node)) then
|
418 |
|
|
begin
|
419 |
|
|
FDataLink.Edit;
|
420 |
|
|
FModifiedNode := TIBTreeNode(Node)
|
421 |
|
|
end;
|
422 |
|
|
end;
|
423 |
|
|
|
424 |
|
|
procedure TIBTreeView.NodeUpdated(Node: TTreeNode);
|
425 |
|
|
begin
|
426 |
|
|
{Need to Update List Field}
|
427 |
|
|
if ScrollToNode(TIBTreeNode(Node)) then
|
428 |
|
|
begin
|
429 |
|
|
FDataLink.Edit;
|
430 |
|
|
FModifiedNode := TIBTreeNode(Node);
|
431 |
|
|
FDataLink.UpdateRecord
|
432 |
|
|
end;
|
433 |
|
|
end;
|
434 |
|
|
|
435 |
|
|
procedure TIBTreeView.RecordChanged(Sender: TObject; Field: TField);
|
436 |
|
|
var Node: TIBTreeNode;
|
437 |
|
|
Destination: TIBTreeNode;
|
438 |
|
|
begin
|
439 |
tony |
27 |
if DataSet.State = dsInsert then Exit;
|
440 |
|
|
|
441 |
tony |
21 |
if assigned(Field) and (Field.FieldName = TextField) then
|
442 |
|
|
begin
|
443 |
|
|
Node := FindNode(DataSet.FieldByName(KeyField).AsVariant);
|
444 |
|
|
if assigned(Node) then
|
445 |
|
|
begin
|
446 |
|
|
FUpdating := true;
|
447 |
|
|
try
|
448 |
|
|
Node.Text := Field.Text
|
449 |
|
|
finally
|
450 |
|
|
FUpdating := false
|
451 |
|
|
end;
|
452 |
|
|
end;
|
453 |
|
|
end
|
454 |
|
|
else
|
455 |
tony |
143 |
if assigned(Field) and (Field.FieldName = ImageIndexField) then
|
456 |
|
|
begin
|
457 |
|
|
Node := FindNode(DataSet.FieldByName(KeyField).AsVariant);
|
458 |
|
|
if assigned(Node) then
|
459 |
|
|
begin
|
460 |
|
|
FUpdating := true;
|
461 |
|
|
try
|
462 |
|
|
Node.ImageIndex := Field.AsInteger
|
463 |
|
|
finally
|
464 |
|
|
FUpdating := false
|
465 |
|
|
end;
|
466 |
|
|
end;
|
467 |
|
|
end
|
468 |
|
|
else
|
469 |
tony |
21 |
if assigned(Field) and (Field.FieldName = ParentField) then
|
470 |
|
|
begin
|
471 |
|
|
Node := FindNode(DataSet.FieldByName(KeyField).AsVariant);
|
472 |
|
|
if assigned(Node) then
|
473 |
|
|
begin
|
474 |
|
|
if DataSet.FieldByName(ParentField).IsNull then
|
475 |
|
|
Destination := nil
|
476 |
|
|
else
|
477 |
|
|
Destination := FindNode(DataSet.FieldByName(ParentField).AsVariant);
|
478 |
|
|
|
479 |
tony |
39 |
if (Destination = nil) or (Destination = Node.Parent) then Exit;
|
480 |
tony |
21 |
|
481 |
|
|
FUpdating := true;
|
482 |
|
|
try
|
483 |
|
|
Node.MoveTo(Destination,naAddChild);
|
484 |
|
|
finally
|
485 |
|
|
FUpdating := false
|
486 |
|
|
end;
|
487 |
|
|
end;
|
488 |
|
|
end
|
489 |
|
|
end;
|
490 |
|
|
|
491 |
|
|
procedure TIBTreeView.SetHasChildField(AValue: string);
|
492 |
|
|
begin
|
493 |
|
|
if FHasChildField = AValue then Exit;
|
494 |
|
|
FHasChildField := AValue;
|
495 |
|
|
Reinitialise
|
496 |
|
|
end;
|
497 |
|
|
|
498 |
tony |
143 |
procedure TIBTreeView.SetImageIndexField(AValue: string);
|
499 |
|
|
begin
|
500 |
|
|
if FImageIndexField = AValue then Exit;
|
501 |
|
|
FImageIndexField := AValue;
|
502 |
|
|
Reinitialise
|
503 |
|
|
end;
|
504 |
|
|
|
505 |
tony |
21 |
procedure TIBTreeView.SetKeyField(AValue: string);
|
506 |
|
|
begin
|
507 |
|
|
if FKeyField = AValue then Exit;
|
508 |
|
|
FKeyField := AValue;
|
509 |
|
|
Reinitialise
|
510 |
|
|
end;
|
511 |
|
|
|
512 |
tony |
143 |
procedure TIBTreeView.SetSelectedIndexField(AValue: string);
|
513 |
|
|
begin
|
514 |
|
|
if FSelectedIndexField = AValue then Exit;
|
515 |
|
|
FSelectedIndexField := AValue;
|
516 |
|
|
Reinitialise;
|
517 |
|
|
end;
|
518 |
|
|
|
519 |
tony |
21 |
procedure TIBTreeView.SetTextField(AValue: string);
|
520 |
|
|
begin
|
521 |
|
|
if FTextField = AValue then Exit;
|
522 |
|
|
FTextField := AValue;
|
523 |
|
|
Reinitialise
|
524 |
|
|
end;
|
525 |
|
|
|
526 |
|
|
procedure TIBTreeView.SetDataSource(AValue: TDataSource);
|
527 |
|
|
begin
|
528 |
tony |
27 |
FDataLink.DataSource := AValue;
|
529 |
|
|
IBControlLinkChanged;
|
530 |
tony |
21 |
end;
|
531 |
|
|
|
532 |
|
|
procedure TIBTreeView.SetParentField(AValue: string);
|
533 |
|
|
begin
|
534 |
|
|
if FParentField = AValue then Exit;
|
535 |
|
|
FParentField := AValue;
|
536 |
|
|
Reinitialise
|
537 |
|
|
end;
|
538 |
|
|
|
539 |
|
|
function TIBTreeView.ScrollToNode(Node: TIBTreeNode): boolean;
|
540 |
|
|
begin
|
541 |
|
|
Result := assigned(DataSet) and DataSet.Active and assigned(Node) and not varIsNull(Node.KeyValue);
|
542 |
|
|
if Result then
|
543 |
|
|
begin
|
544 |
|
|
if DataSet.Active and (DataSet.RecordCount > 0)
|
545 |
tony |
80 |
and DataSet.Locate(KeyField,Node.KeyValue,[]) then Exit;
|
546 |
tony |
21 |
|
547 |
|
|
FUpdateNode := Node;
|
548 |
|
|
try
|
549 |
|
|
DataSet.Active := false;
|
550 |
|
|
DataSet.Active := true;
|
551 |
|
|
finally
|
552 |
|
|
FUpdateNode := nil
|
553 |
|
|
end;
|
554 |
|
|
Result := DataSet.FieldByName(KeyField).AsVariant = Node.KeyValue
|
555 |
|
|
end;
|
556 |
|
|
end;
|
557 |
|
|
|
558 |
|
|
procedure TIBTreeView.UpdateData(Sender: TObject);
|
559 |
|
|
begin
|
560 |
|
|
if assigned(FModifiedNode) then
|
561 |
|
|
begin
|
562 |
|
|
DataSet.FieldByName(TextField).AsString := FModifiedNode.Text;
|
563 |
|
|
if FModifiedNode.Parent = nil then
|
564 |
|
|
DataSet.FieldByName(ParentField).Clear
|
565 |
|
|
else
|
566 |
|
|
DataSet.FieldByName(ParentField).AsVariant := TIBTreeNode(FModifiedNode.Parent).KeyValue;
|
567 |
|
|
FModifiedNode := nil
|
568 |
|
|
end
|
569 |
|
|
end;
|
570 |
|
|
|
571 |
|
|
procedure TIBTreeView.UpdateParams(Sender: TObject; Parser: TSelectSQLParser);
|
572 |
|
|
begin
|
573 |
|
|
if not assigned(FExpandNode) and assigned(FUpdateNode) then {Scrolling dataset}
|
574 |
|
|
begin
|
575 |
tony |
27 |
if DataSource.DataSet is TIBQuery then
|
576 |
|
|
TIBQuery(DataSource.DataSet).ParamByName('IBX_KEY_VALUE').Value :=
|
577 |
tony |
21 |
FUpdateNode.KeyValue
|
578 |
|
|
else
|
579 |
tony |
27 |
if DataSource.DataSet is TIBDataSet then
|
580 |
|
|
TIBDataSet(DataSource.DataSet).ParamByName('IBX_KEY_VALUE').Value :=
|
581 |
tony |
21 |
FUpdateNode.KeyValue
|
582 |
|
|
end
|
583 |
|
|
else
|
584 |
|
|
if assigned(FExpandNode) then
|
585 |
|
|
begin
|
586 |
tony |
27 |
if DataSource.DataSet is TIBQuery then
|
587 |
|
|
TIBQuery(DataSource.DataSet).ParamByName('IBX_PARENT_VALUE').Value :=
|
588 |
tony |
21 |
TIBTreeNode(FExpandNode).KeyValue
|
589 |
|
|
else
|
590 |
tony |
27 |
if DataSource.DataSet is TIBDataSet then
|
591 |
|
|
TIBDataSet(DataSource.DataSet).ParamByName('IBX_PARENT_VALUE').Value :=
|
592 |
tony |
21 |
TIBTreeNode(FExpandNode).KeyValue
|
593 |
|
|
end;
|
594 |
|
|
end;
|
595 |
|
|
|
596 |
|
|
procedure TIBTreeView.UpdateSQL(Sender: TObject; Parser: TSelectSQLParser);
|
597 |
|
|
begin
|
598 |
|
|
if not assigned(FExpandNode) and assigned(FUpdateNode) then {Scrolling dataset}
|
599 |
|
|
Parser.Add2WhereClause(GetRelationNameQualifier + '"' + FKeyField + '" = :IBX_KEY_VALUE')
|
600 |
|
|
else
|
601 |
|
|
if (Items.Count = 0) then
|
602 |
|
|
{Need to Load Root Nodes}
|
603 |
|
|
Parser.Add2WhereClause(GetRelationNameQualifier + '"' + FParentField + '" is null')
|
604 |
|
|
else
|
605 |
|
|
if assigned(FExpandNode) then
|
606 |
tony |
143 |
begin
|
607 |
tony |
21 |
Parser.Add2WhereClause(GetRelationNameQualifier + '"' + FParentField + '" = :IBX_PARENT_VALUE');
|
608 |
tony |
143 |
Parser.Add2WhereClause(GetRelationNameQualifier + '"' + FKeyField + '" = :IBX_PARENT_VALUE',true);
|
609 |
|
|
end;
|
610 |
tony |
21 |
end;
|
611 |
|
|
|
612 |
|
|
procedure TIBTreeView.Added(Node: TTreeNode);
|
613 |
|
|
begin
|
614 |
tony |
272 |
if assigned(DataSet) and DataSet.Active then
|
615 |
tony |
21 |
begin
|
616 |
tony |
272 |
if not FNoAddNodeToDataset then
|
617 |
|
|
begin
|
618 |
|
|
DataSet.Append;
|
619 |
|
|
if (Node.Text = '') and not DataSet.FieldByName(TextField).IsNull then
|
620 |
|
|
Node.Text := DataSet.FieldByName(TextField).AsString;
|
621 |
|
|
FModifiedNode := TIBTreeNode(Node);
|
622 |
|
|
FDataLink.UpdateRecord;
|
623 |
|
|
end;
|
624 |
tony |
21 |
TIBTreeNode(Node).FKeyValue := DataSet.FieldByName(KeyField).AsVariant;
|
625 |
tony |
272 |
if ImageIndexField <> '' then
|
626 |
|
|
Node.ImageIndex := DataSet.FieldByName(ImageIndexField).AsInteger;
|
627 |
|
|
if SelectedIndexField <> '' then
|
628 |
|
|
Node.SelectedIndex := DataSet.FieldByName(SelectedIndexField).AsInteger;
|
629 |
tony |
21 |
end;
|
630 |
|
|
inherited Added(Node);
|
631 |
|
|
end;
|
632 |
|
|
|
633 |
|
|
procedure TIBTreeView.Delete(Node: TTreeNode);
|
634 |
|
|
begin
|
635 |
|
|
if not (tvsUpdating in States) {TreeNodes being cleared}
|
636 |
|
|
and not (tvsManualNotify in States) {Tree Collapse with node delete}
|
637 |
|
|
and ScrollToNode(TIBTreeNode(Node)) then
|
638 |
|
|
DataSet.Delete;
|
639 |
|
|
inherited Delete(Node);
|
640 |
|
|
end;
|
641 |
|
|
|
642 |
|
|
procedure TIBTreeView.Change(Node: TTreeNode);
|
643 |
|
|
begin
|
644 |
|
|
inherited Change(Node);
|
645 |
|
|
ScrollToNode(TIBTreeNode(Node));
|
646 |
|
|
end;
|
647 |
|
|
|
648 |
|
|
function TIBTreeView.CreateNode: TTreeNode;
|
649 |
|
|
var
|
650 |
|
|
NewNodeClass: TTreeNodeClass;
|
651 |
|
|
begin
|
652 |
|
|
Result := nil;
|
653 |
|
|
if Assigned(OnCustomCreateItem) then
|
654 |
|
|
OnCustomCreateItem(Self, Result);
|
655 |
|
|
if Result = nil then
|
656 |
|
|
begin
|
657 |
|
|
NewNodeClass:=TIBTreeNode;
|
658 |
|
|
if Assigned(OnCreateNodeClass) then
|
659 |
|
|
OnCreateNodeClass(Self,NewNodeClass);
|
660 |
|
|
Result := NewNodeClass.Create(Items);
|
661 |
|
|
end;
|
662 |
|
|
end;
|
663 |
|
|
|
664 |
|
|
function TIBTreeView.CanEdit(Node: TTreeNode): Boolean;
|
665 |
|
|
begin
|
666 |
|
|
Result := inherited CanEdit(Node)
|
667 |
|
|
and assigned(DataSet) and not DataSet.FieldByName(TextField).ReadOnly
|
668 |
|
|
end;
|
669 |
|
|
|
670 |
|
|
procedure TIBTreeView.Expand(Node: TTreeNode);
|
671 |
|
|
begin
|
672 |
|
|
inherited Expand(Node);
|
673 |
|
|
if Node.HasChildren and assigned(DataSet) and (Node.GetFirstChild = nil) then
|
674 |
|
|
begin
|
675 |
|
|
FExpandNode := Node;
|
676 |
|
|
DataSet.Active := false;
|
677 |
|
|
DataSet.Active := true;
|
678 |
tony |
143 |
Selected := Node;
|
679 |
tony |
21 |
end;
|
680 |
|
|
end;
|
681 |
|
|
|
682 |
tony |
27 |
procedure TIBTreeView.IBControlLinkChanged;
|
683 |
|
|
begin
|
684 |
|
|
if assigned(DataSource) and (DataSource.DataSet <> nil) and (DataSource.DataSet is TIBParserDataset) then
|
685 |
|
|
FIBTreeViewControllink.IBDataSet := TIBCustomDataSet(DataSource.DataSet)
|
686 |
|
|
else
|
687 |
|
|
FIBTreeViewControllink.IBDataSet := nil;
|
688 |
|
|
end;
|
689 |
|
|
|
690 |
tony |
21 |
procedure TIBTreeView.Loaded;
|
691 |
|
|
begin
|
692 |
|
|
inherited Loaded;
|
693 |
tony |
29 |
IBControlLinkChanged;
|
694 |
tony |
21 |
Reinitialise
|
695 |
|
|
end;
|
696 |
|
|
|
697 |
|
|
procedure TIBTreeView.NodeChanged(Node: TTreeNode;
|
698 |
|
|
ChangeEvent: TTreeNodeChangeReason);
|
699 |
|
|
begin
|
700 |
|
|
inherited NodeChanged(Node, ChangeEvent);
|
701 |
|
|
if not FNoAddNodeToDataset and not FUpdating then
|
702 |
|
|
case ChangeEvent of
|
703 |
|
|
ncTextChanged:
|
704 |
|
|
NodeUpdated(Node);
|
705 |
|
|
ncParentChanged:
|
706 |
|
|
NodeMoved(Node);
|
707 |
|
|
end;
|
708 |
|
|
end;
|
709 |
|
|
|
710 |
|
|
procedure TIBTreeView.Notification(AComponent: TComponent; Operation: TOperation
|
711 |
|
|
);
|
712 |
|
|
begin
|
713 |
|
|
inherited Notification(AComponent, Operation);
|
714 |
|
|
if (Operation = opRemove) and
|
715 |
tony |
27 |
(FDataLink <> nil) and (AComponent = DataSource) then
|
716 |
|
|
DataSource := nil;
|
717 |
tony |
21 |
end;
|
718 |
|
|
|
719 |
|
|
procedure TIBTreeView.Reinitialise;
|
720 |
|
|
begin
|
721 |
|
|
if [csDesigning,csLoading] * ComponentState <> [] then Exit;
|
722 |
|
|
FLastSelected := GetNodePath(Selected);
|
723 |
|
|
Items.Clear;
|
724 |
|
|
end;
|
725 |
|
|
|
726 |
|
|
constructor TIBTreeView.Create(TheComponent: TComponent);
|
727 |
|
|
begin
|
728 |
|
|
inherited Create(TheComponent);
|
729 |
|
|
FDataLink := TIBTreeViewDatalink.Create(self);
|
730 |
tony |
27 |
FIBTreeViewControlLink := TIBTreeViewControlLink.Create(self);
|
731 |
tony |
21 |
end;
|
732 |
|
|
|
733 |
|
|
destructor TIBTreeView.Destroy;
|
734 |
|
|
begin
|
735 |
|
|
if assigned(FDataLink) then FDataLink.Free;
|
736 |
tony |
27 |
if assigned(FIBTreeViewControlLink) then FIBTreeViewControlLink.Free;
|
737 |
tony |
21 |
inherited Destroy;
|
738 |
|
|
end;
|
739 |
|
|
|
740 |
tony |
80 |
function TIBTreeView.FindNode(KeyValuePath: TVariantArray; SelectNode: boolean
|
741 |
|
|
): TIBTreeNode;
|
742 |
tony |
21 |
var Node: TTreeNode;
|
743 |
|
|
i,j: integer;
|
744 |
|
|
begin
|
745 |
|
|
Result := nil;
|
746 |
tony |
80 |
if Length(KeyValuePath) = 0 then Exit;
|
747 |
|
|
|
748 |
tony |
21 |
FLocatingNode := true;
|
749 |
|
|
try
|
750 |
|
|
for j := 0 to Items.TopLvlCount - 1 do
|
751 |
|
|
begin
|
752 |
|
|
Node := Items.TopLvlItems[j];
|
753 |
|
|
i := 0;
|
754 |
|
|
Node.Expand(false);
|
755 |
|
|
while assigned(Node) do
|
756 |
|
|
begin
|
757 |
tony |
80 |
if not VarIsNull(TIBTreeNode(Node).KeyValue) and
|
758 |
|
|
(TIBTreeNode(Node).KeyValue = KeyValuePath[i]) then
|
759 |
tony |
21 |
begin
|
760 |
|
|
Inc(i);
|
761 |
|
|
if i = Length(KeyValuePath) then
|
762 |
|
|
begin
|
763 |
|
|
Result := TIBTreeNode(Node);
|
764 |
|
|
if SelectNode then
|
765 |
|
|
Selected := Node;
|
766 |
|
|
Exit
|
767 |
|
|
end
|
768 |
|
|
else
|
769 |
|
|
begin
|
770 |
|
|
Node.Expand(false);
|
771 |
|
|
Node := Node.GetFirstChild;
|
772 |
|
|
end
|
773 |
|
|
end
|
774 |
|
|
else
|
775 |
|
|
Node := Node.GetNextSibling
|
776 |
|
|
end
|
777 |
|
|
end
|
778 |
|
|
finally
|
779 |
|
|
FLocatingNode := false
|
780 |
|
|
end
|
781 |
|
|
end;
|
782 |
|
|
|
783 |
|
|
function TIBTreeView.FindNode(KeyValue: variant): TIBTreeNode;
|
784 |
|
|
var i: integer;
|
785 |
|
|
begin
|
786 |
|
|
Result := nil;
|
787 |
|
|
if (Selected <> nil) and (TIBTreeNode(Selected).KeyValue = KeyValue) then
|
788 |
|
|
Result := TIBTreeNode(Selected)
|
789 |
|
|
else
|
790 |
|
|
{Find it the hard way}
|
791 |
|
|
begin
|
792 |
|
|
FullExpand;
|
793 |
|
|
for i := 0 to Items.Count -1 do
|
794 |
|
|
if TIBTreeNode(Items[i]).KeyValue = KeyValue then
|
795 |
|
|
begin
|
796 |
|
|
Result := TIBTreeNode(Items[i])
|
797 |
|
|
end;
|
798 |
|
|
end;
|
799 |
|
|
end;
|
800 |
|
|
|
801 |
|
|
function TIBTreeView.GetNodePath(Node: TTreeNode): TVariantArray;
|
802 |
|
|
var aParent: TTreeNode;
|
803 |
|
|
i: integer;
|
804 |
|
|
begin
|
805 |
|
|
if not assigned(Node) or not (Node is TIBTreeNode) then
|
806 |
|
|
SetLength(Result,0)
|
807 |
|
|
else
|
808 |
|
|
begin
|
809 |
|
|
{Count length of Path}
|
810 |
|
|
i := 1;
|
811 |
|
|
aParent := Node.Parent;
|
812 |
|
|
while (aParent <> nil) do
|
813 |
|
|
begin
|
814 |
|
|
Inc(i);
|
815 |
|
|
aParent := aParent.Parent
|
816 |
|
|
end;
|
817 |
|
|
|
818 |
|
|
{Save Path}
|
819 |
|
|
Setlength(Result,i);
|
820 |
|
|
while i > 0 do
|
821 |
|
|
begin
|
822 |
|
|
Dec(i);
|
823 |
|
|
Result[i] := TIBTreeNode(Node).KeyValue;
|
824 |
|
|
Node := Node.Parent
|
825 |
|
|
end;
|
826 |
|
|
end;
|
827 |
|
|
end;
|
828 |
|
|
|
829 |
|
|
{ TIBTreeViewDatalink }
|
830 |
|
|
|
831 |
|
|
procedure TIBTreeViewDatalink.ActiveChanged;
|
832 |
|
|
begin
|
833 |
|
|
FOwner.ActiveChanged(self)
|
834 |
|
|
end;
|
835 |
|
|
|
836 |
|
|
procedure TIBTreeViewDatalink.DataSetChanged;
|
837 |
|
|
begin
|
838 |
|
|
FOwner.DataSetChanged(self)
|
839 |
|
|
end;
|
840 |
|
|
|
841 |
|
|
procedure TIBTreeViewDatalink.RecordChanged(Field: TField);
|
842 |
|
|
begin
|
843 |
|
|
FOwner.RecordChanged(self,Field);
|
844 |
|
|
end;
|
845 |
|
|
|
846 |
|
|
procedure TIBTreeViewDatalink.UpdateData;
|
847 |
|
|
begin
|
848 |
|
|
FOwner.UpdateData(self)
|
849 |
|
|
end;
|
850 |
|
|
|
851 |
|
|
constructor TIBTreeViewDatalink.Create(AOwner: TIBTreeView);
|
852 |
|
|
begin
|
853 |
|
|
inherited Create;
|
854 |
|
|
FOwner := AOwner
|
855 |
|
|
end;
|
856 |
|
|
|
857 |
|
|
end.
|