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ibx/trunk/ibcontrols/IBTreeView.pas (file contents), Revision 39 by tony, Tue May 17 08:14:52 2016 UTC vs.
ibx/branches/journaling/ibcontrols/IBTreeView.pas (file contents), Revision 362 by tony, Tue Dec 7 13:27:39 2021 UTC

#	Line 31 | Line 31 | interface
31
32		uses
33		Classes, SysUtils, LResources, Forms, Controls, Graphics, Dialogs, ComCtrls,
34	<	DB, IBSQLParser, IBCustomDataSet;
34	>	DB, DBTreeView, IBSQLParser, IBCustomDataSet;
35
36		type
37		{
#	Line 41 | Line 41 | type
41		Node text can similarly be edited.
42		}
43
44	–	TVariantArray = array of variant;
45	–
44		TIBTreeView = class;
45	<
48	<	{ TIBTreeViewDatalink }
49	<
50	<	TIBTreeViewDatalink = class(TDataLink)
51	<	private
52	<	FOwner: TIBTreeView;
53	<	protected
54	<	procedure ActiveChanged; override;
55	<	procedure DataSetChanged; override;
56	<	procedure RecordChanged(Field: TField); override;
57	<	procedure UpdateData; override;
58	<	public
59	<	constructor Create(AOwner: TIBTreeView);
60	<	end;
45	>	TIBTreeNode = TDBTreeNode;
46
47		{ TIBTreeViewControlLink }
48
#	Line 71 | Line 56 | type
56		constructor Create(AOwner: TIBTreeView);
57		end;
58
59	<	{ TIBTreeNode }
75	<
76	<	TIBTreeNode = class(TTreeNode)
77	<	private
78	<	FKeyValue: variant;
79	<	public
80	<	procedure DeleteAll;
81	<	property KeyValue: variant read FKeyValue;
82	<	end;
83	<
84	<	TIBTreeView = class(TCustomTreeView)
59	>	TIBTreeView = class(TDBTreeView)
60		private
61		{ Private declarations }
87	–	FDataLink: TIBTreeViewDatalink;
62		FIBTreeViewControlLink: TIBTreeViewControlLink;
89	–	FHasChildField: string;
90	–	FKeyField: string;
91	–	FTextField: string;
92	–	FParentField: string;
93	–	FExpandNode: TTreeNode;
94	–	FNoAddNodeToDataset: boolean;
95	–	FRelationName: string;
96	–	FUpdateNode: TIBTreeNode;
97	–	FModifiedNode: TIBTreeNode;
98	–	FUpdating: boolean;
99	–	FLocatingNode: boolean;
100	–	FLastSelected: TVariantArray;
101	–	procedure ActiveChanged(Sender: TObject);
102	–	procedure AddNodes;
103	–	procedure DataSetChanged(Sender: TObject);
104	–	function GetDataSet: TDataSet;
105	–	function GetDataSource: TDataSource;
106	–	function GetRelationNameQualifier: string;
107	–	function GetSelectedKeyValue: variant;
108	–	procedure IBControlLinkChanged;
109	–	procedure NodeMoved(Node: TTreeNode);
110	–	procedure NodeUpdated(Node: TTreeNode);
111	–	procedure RecordChanged(Sender: TObject; Field: TField);
112	–	procedure SetHasChildField(AValue: string);
113	–	procedure SetKeyField(AValue: string);
114	–	procedure SetTextField(AValue: string);
115	–	procedure SetDataSource(AValue: TDataSource);
116	–	procedure SetParentField(AValue: string);
117	–	function ScrollToNode(Node: TIBTreeNode): boolean;
118	–	procedure UpdateData(Sender: TObject);
63		procedure UpdateParams(Sender: TObject; Parser: TSelectSQLParser);
64		procedure UpdateSQL(Sender: TObject; Parser: TSelectSQLParser);
65		protected
66	<	{ Protected declarations }
67	<	procedure Added(Node: TTreeNode); override;
124	<	procedure Delete(Node: TTreeNode); override;
125	<	procedure Change(Node: TTreeNode); override;
126	<	function CreateNode: TTreeNode; override;
127	<	function CanEdit(Node: TTreeNode): Boolean; override;
128	<	procedure Expand(Node: TTreeNode); override;
129	<	procedure Loaded; override;
130	<	procedure NodeChanged(Node: TTreeNode; ChangeEvent: TTreeNodeChangeReason); override;
131	<	procedure Notification(AComponent: TComponent; Operation: TOperation); override;
132	<	procedure Reinitialise;
66	>	procedure DataSourceChanged; override;
67	>	procedure RefreshDataset; override;
68		public
69		{ Public declarations }
70		constructor Create(TheComponent: TComponent); override;
71		destructor Destroy; override;
137	–	function FindNode(KeyValuePath: array of variant; SelectNode: boolean): TIBTreeNode; overload;
138	–	function FindNode(KeyValue: variant): TIBTreeNode; overload;
139	–	function GetNodePath(Node: TTreeNode): TVariantArray;
140	–	property DataSet: TDataSet read GetDataSet;
141	–	property SelectedKeyValue: variant read GetSelectedKeyValue;
142	–	published
143	–	{ Published declarations }
144	–	property Align;
145	–	property Anchors;
146	–	property AutoExpand;
147	–	property BorderSpacing;
148	–	//property BiDiMode;
149	–	property BackgroundColor;
150	–	property BorderStyle;
151	–	property BorderWidth;
152	–	property Color;
153	–	property Constraints;
154	–	property TextField: string read FTextField write SetTextField;
155	–	property DataSource: TDataSource read GetDataSource write SetDataSource;
156	–	property DefaultItemHeight;
157	–	property DragKind;
158	–	property DragCursor;
159	–	property DragMode;
160	–	property Enabled;
161	–	property ExpandSignColor;
162	–	property ExpandSignType;
163	–	property Font;
164	–	property HideSelection;
165	–	property HotTrack;
166	–	property Images;
167	–	property Indent;
168	–	property HasChildField: string read FHasChildField write SetHasChildField;
169	–	property KeyField: string read FKeyField write SetKeyField;
170	–	property MultiSelect;
171	–	property MultiSelectStyle;
172	–	//property ParentBiDiMode;
173	–	property ParentColor default False;
174	–	property ParentField: string read FParentField write SetParentField;
175	–	property ParentFont;
176	–	property ParentShowHint;
177	–	property PopupMenu;
178	–	property ReadOnly;
179	–	property RelationName: string read FRelationName write FRelationName;
180	–	property RightClickSelect;
181	–	property RowSelect;
182	–	property ScrollBars;
183	–	property SelectionColor;
184	–	property ShowButtons;
185	–	property ShowHint;
186	–	property ShowLines;
187	–	property ShowRoot;
188	–	property StateImages;
189	–	property TabOrder;
190	–	property TabStop default True;
191	–	property Tag;
192	–	property ToolTips;
193	–	property Visible;
194	–	property OnAddition;
195	–	property OnAdvancedCustomDraw;
196	–	property OnAdvancedCustomDrawItem;
197	–	property OnChange;
198	–	property OnChanging;
199	–	property OnClick;
200	–	property OnCollapsed;
201	–	property OnCollapsing;
202	–	property OnCompare;
203	–	property OnContextPopup;
204	–	property OnCreateNodeClass;
205	–	property OnCustomCreateItem;
206	–	property OnCustomDraw;
207	–	property OnCustomDrawItem;
208	–	property OnDblClick;
209	–	property OnDeletion;
210	–	property OnDragDrop;
211	–	property OnDragOver;
212	–	property OnEdited;
213	–	property OnEditing;
214	–	property OnEditingEnd;
215	–	//property OnEndDock;
216	–	property OnEndDrag;
217	–	property OnEnter;
218	–	property OnExit;
219	–	property OnExpanded;
220	–	property OnExpanding;
221	–	property OnGetImageIndex;
222	–	property OnGetSelectedIndex;
223	–	property OnKeyDown;
224	–	property OnKeyPress;
225	–	property OnKeyUp;
226	–	property OnMouseDown;
227	–	property OnMouseEnter;
228	–	property OnMouseLeave;
229	–	property OnMouseMove;
230	–	property OnMouseUp;
231	–	property OnNodeChanged;
232	–	property OnSelectionChanged;
233	–	property OnShowHint;
234	–	//property OnStartDock;
235	–	property OnStartDrag;
236	–	property OnUTF8KeyPress;
237	–	property Options;
238	–	property Items;
239	–	property TreeLineColor;
240	–	property TreeLinePenStyle;
72		end;
73
74	<	function StrIntListToVar(s: string): TVariantArray;
75	<	function VarToStrIntList(a: TVariantArray): string;
74	>	function StrIntListToVar(s: string): TVariantArray;
75	>	function VarToStrIntList(a: TVariantArray): string;
76
77		implementation
78
79	<	uses IBQuery,Variants;
79	>	uses IBQuery;
80
81		function StrIntListToVar(s: string): TVariantArray;
251	–	var i, idx: integer;
252	–	List: TStringList;
82		begin
83	<	List := TStringList.Create;
255	<	try
256	<	idx := 1;
257	<	List.Clear;
258	<	while idx <= Length(s) do
259	<	List.Add(ExtractFieldName(s,idx));
260	<
261	<	Setlength(Result,List.Count);
262	<	for i := 0 to List.Count - 1 do
263	<	Result[i] := StrToInt(List[i])
264	<	finally
265	<	List.Free
266	<	end;
83	>	Result := DBTreeView.StrIntListToVar(s);
84		end;
85
86		function VarToStrIntList(a: TVariantArray): string;
270	–	var i: integer;
87		begin
88	<	for i := 0 to Length(a) - 1 do
273	<	if VarIsOrdinal(a[i]) then
274	<	begin
275	<	if i = 0 then
276	<	Result := IntToStr(a[i])
277	<	else
278	<	Result := Result + ';' + IntToStr(a[i])
279	<	end
280	<	else
281	<	raise Exception.Create('Ordinal Type Expected when converting to integer string');
88	>	Result := DBTreeView.VarToStrIntList(a);
89		end;
90
91	+
92		{ TIBTreeViewControlLink }
93
94		constructor TIBTreeViewControlLink.Create(AOwner: TIBTreeView);
#	Line 299 | Line 107 | begin
107		FOwner.UpdateSQL(self,TIBParserDataSet(Sender).Parser)
108		end;
109
302	–	{ TIBTreeNode }
303	–
304	–	procedure TIBTreeNode.DeleteAll;
305	–	var Node, NextNode: TTreeNode;
306	–	begin
307	–	Expand(true);
308	–	Node := GetFirstChild;
309	–	while Node <> nil do
310	–	begin
311	–	NextNode := Node.GetNextSibling;
312	–	TIBTreeNode(Node).DeleteAll;
313	–	Node := NextNode;
314	–	end;
315	–	Delete
316	–	end;
317	–
318	–	{ TIBTreeView }
319	–
320	–	procedure TIBTreeView.ActiveChanged(Sender: TObject);
321	–	var AtTopLevel: boolean;
322	–	begin
323	–	if (csDesigning in ComponentState) then Exit;
324	–	IBControlLinkChanged;
325	–	if assigned(DataSet) and not DataSet.Active then
326	–	begin
327	–	if not assigned(FExpandNode) and not assigned(FUpdateNode) then {must really be closing}
328	–	Reinitialise
329	–	end
330	–	else
331	–	begin
332	–	AtTopLevel := Items.TopLvlCount = 0;
333	–	AddNodes;
334	–	if not FLocatingNode and (Selected = nil) and (Items.TopLvlCount > 0) then
335	–	begin
336	–	if Length(FLastSelected) > 0 then
337	–	Selected := FindNode(FLastSelected,true)
338	–	else
339	–	Selected := Items.TopLvlItems[0];
340	–	end
341	–	end
342	–	end;
343	–
344	–	procedure TIBTreeView.AddNodes;
345	–	var Node: TTreeNode;
346	–	ChildCount: integer;
347	–	begin
348	–	if assigned(FExpandNode) or (Items.Count = 0) then
349	–	begin
350	–	ChildCount := 0;
351	–	FNoAddNodeToDataset := true;
352	–	try
353	–	DataSet.First;
354	–	while not DataSet.EOF do
355	–	begin
356	–	Node := Items.AddChild(FExpandNode,DataSet.FieldByName(TextField).AsString);
357	–	TIBTreeNode(Node).FKeyValue := DataSet.FieldByName(KeyField).AsVariant;
358	–	Node.HasChildren := (HasChildField = '') or (DataSet.FieldByName(HasChildField).AsInteger <> 0);
359	–	Inc(ChildCount);
360	–	DataSet.Next
361	–	end;
362	–	finally
363	–	FNoAddNodeToDataset := false
364	–	end;
365	–	if assigned(FExpandNode) then
366	–	FExpandNode.HasChildren := ChildCount > 0;
367	–	FExpandNode := nil
368	–	end
369	–	end;
370	–
371	–	procedure TIBTreeView.DataSetChanged(Sender: TObject);
372	–	begin
373	–	//  Reinitialise
374	–	end;
375	–
376	–	function TIBTreeView.GetDataSet: TDataSet;
377	–	begin
378	–	Result := FDataLink.DataSet
379	–	end;
380	–
381	–	function TIBTreeView.GetDataSource: TDataSource;
382	–	begin
383	–	Result := FDataLink.DataSource
384	–	end;
385	–
386	–	function TIBTreeView.GetRelationNameQualifier: string;
387	–	begin
388	–	if FRelationName <> '' then
389	–	Result := FRelationName + '.'
390	–	else
391	–	Result := ''
392	–	end;
393	–
394	–	function TIBTreeView.GetSelectedKeyValue: variant;
395	–	begin
396	–	Result := NULL;
397	–	if assigned(Selected) and (Selected is TIBTreeNode) then
398	–	Result := TIBTreeNode(Selected).KeyValue
399	–	end;
400	–
401	–	procedure TIBTreeView.NodeMoved(Node: TTreeNode);
402	–	begin
403	–	{Need to update Parent}
404	–	if ScrollToNode(TIBTreeNode(Node))  then
405	–	begin
406	–	FDataLink.Edit;
407	–	FModifiedNode := TIBTreeNode(Node)
408	–	end;
409	–	end;
410	–
411	–	procedure TIBTreeView.NodeUpdated(Node: TTreeNode);
412	–	begin
413	–	{Need to Update List Field}
414	–	if ScrollToNode(TIBTreeNode(Node)) then
415	–	begin
416	–	FDataLink.Edit;
417	–	FModifiedNode := TIBTreeNode(Node);
418	–	FDataLink.UpdateRecord
419	–	end;
420	–	end;
421	–
422	–	procedure TIBTreeView.RecordChanged(Sender: TObject; Field: TField);
423	–	var Node: TIBTreeNode;
424	–	Destination: TIBTreeNode;
425	–	begin
426	–	if DataSet.State = dsInsert then Exit;
427	–
428	–	if assigned(Field) and (Field.FieldName = TextField) then
429	–	begin
430	–	Node := FindNode(DataSet.FieldByName(KeyField).AsVariant);
431	–	if assigned(Node) then
432	–	begin
433	–	FUpdating := true;
434	–	try
435	–	Node.Text := Field.Text
436	–	finally
437	–	FUpdating := false
438	–	end;
439	–	end;
440	–	end
441	–	else
442	–	if assigned(Field) and (Field.FieldName = ParentField) then
443	–	begin
444	–	Node := FindNode(DataSet.FieldByName(KeyField).AsVariant);
445	–	if assigned(Node)  then
446	–	begin
447	–	if DataSet.FieldByName(ParentField).IsNull then
448	–	Destination := nil
449	–	else
450	–	Destination := FindNode(DataSet.FieldByName(ParentField).AsVariant);
451	–
452	–	if (Destination = nil) or (Destination = Node.Parent) then Exit;
453	–
454	–	FUpdating := true;
455	–	try
456	–	Node.MoveTo(Destination,naAddChild);
457	–	finally
458	–	FUpdating := false
459	–	end;
460	–	end;
461	–	end
462	–	end;
463	–
464	–	procedure TIBTreeView.SetHasChildField(AValue: string);
465	–	begin
466	–	if FHasChildField = AValue then Exit;
467	–	FHasChildField := AValue;
468	–	Reinitialise
469	–	end;
470	–
471	–	procedure TIBTreeView.SetKeyField(AValue: string);
472	–	begin
473	–	if FKeyField = AValue then Exit;
474	–	FKeyField := AValue;
475	–	Reinitialise
476	–	end;
477	–
478	–	procedure TIBTreeView.SetTextField(AValue: string);
479	–	begin
480	–	if FTextField = AValue then Exit;
481	–	FTextField := AValue;
482	–	Reinitialise
483	–	end;
484	–
485	–	procedure TIBTreeView.SetDataSource(AValue: TDataSource);
486	–	begin
487	–	FDataLink.DataSource := AValue;
488	–	IBControlLinkChanged;
489	–	end;
490	–
491	–	procedure TIBTreeView.SetParentField(AValue: string);
492	–	begin
493	–	if FParentField = AValue then Exit;
494	–	FParentField := AValue;
495	–	Reinitialise
496	–	end;
497	–
498	–	function TIBTreeView.ScrollToNode(Node: TIBTreeNode): boolean;
499	–	begin
500	–	Result :=  assigned(DataSet) and DataSet.Active and assigned(Node) and not varIsNull(Node.KeyValue);
501	–	if Result then
502	–	begin
503	–	if DataSet.Active and (DataSet.RecordCount > 0)
504	–	and (Node.KeyValue = DataSet.FieldByName(KeyField).AsVariant) then Exit;
505	–
506	–	FUpdateNode := Node;
507	–	try
508	–	DataSet.Active := false;
509	–	DataSet.Active := true;
510	–	finally
511	–	FUpdateNode := nil
512	–	end;
513	–	Result := DataSet.FieldByName(KeyField).AsVariant = Node.KeyValue
514	–	end;
515	–	end;
516	–
517	–	procedure TIBTreeView.UpdateData(Sender: TObject);
518	–	begin
519	–	if assigned(FModifiedNode) then
520	–	begin
521	–	DataSet.FieldByName(TextField).AsString := FModifiedNode.Text;
522	–	if FModifiedNode.Parent = nil then
523	–	DataSet.FieldByName(ParentField).Clear
524	–	else
525	–	DataSet.FieldByName(ParentField).AsVariant := TIBTreeNode(FModifiedNode.Parent).KeyValue;
526	–	FModifiedNode := nil
527	–	end
528	–	end;
110
111		procedure TIBTreeView.UpdateParams(Sender: TObject; Parser: TSelectSQLParser);
112		begin
#	Line 544 | Line 125 | begin
125		begin
126		if DataSource.DataSet is TIBQuery then
127		TIBQuery(DataSource.DataSet).ParamByName('IBX_PARENT_VALUE').Value :=
128	<	TIBTreeNode(FExpandNode).KeyValue
128	>	TDBTreeNode(FExpandNode).KeyValue
129		else
130		if DataSource.DataSet is TIBDataSet then
131		TIBDataSet(DataSource.DataSet).ParamByName('IBX_PARENT_VALUE').Value :=
132	<	TIBTreeNode(FExpandNode).KeyValue
132	>	TDBTreeNode(FExpandNode).KeyValue
133		end;
134		end;
135
136		procedure TIBTreeView.UpdateSQL(Sender: TObject; Parser: TSelectSQLParser);
137		begin
138		if not assigned(FExpandNode) and assigned(FUpdateNode)  then {Scrolling dataset}
139	<	Parser.Add2WhereClause(GetRelationNameQualifier + '"' + FKeyField + '" = :IBX_KEY_VALUE')
139	>	Parser.Add2WhereClause(GetRelationNameQualifier + '"' + KeyField + '" = :IBX_KEY_VALUE')
140		else
141		if (Items.Count = 0) then
142		{Need to Load Root Nodes}
143	<	Parser.Add2WhereClause(GetRelationNameQualifier + '"' + FParentField + '" is null')
143	>	Parser.Add2WhereClause(GetRelationNameQualifier + '"' + ParentField + '" is null')
144		else
145		if assigned(FExpandNode) then
146	<	Parser.Add2WhereClause(GetRelationNameQualifier + '"' + FParentField + '" = :IBX_PARENT_VALUE');
147	<	end;
148	<
149	<	procedure TIBTreeView.Added(Node: TTreeNode);
569	<	begin
570	<	if assigned(DataSet) and DataSet.Active and not FNoAddNodeToDataset then
571	<	begin
572	<	DataSet.Append;
573	<	TIBTreeNode(Node).FKeyValue := DataSet.FieldByName(KeyField).AsVariant;
574	<	if (Node.Text = '') and not DataSet.FieldByName(TextField).IsNull then
575	<	Node.Text := DataSet.FieldByName(TextField).AsString;
576	<	FModifiedNode := TIBTreeNode(Node);
577	<	FDataLink.UpdateRecord
578	<	end;
579	<	inherited Added(Node);
580	<	end;
581	<
582	<	procedure TIBTreeView.Delete(Node: TTreeNode);
583	<	begin
584	<	if not (tvsUpdating in States) {TreeNodes being cleared}
585	<	and not (tvsManualNotify in States) {Tree Collapse with node delete}
586	<	and ScrollToNode(TIBTreeNode(Node)) then
587	<	DataSet.Delete;
588	<	inherited Delete(Node);
589	<	end;
590	<
591	<	procedure TIBTreeView.Change(Node: TTreeNode);
592	<	begin
593	<	inherited Change(Node);
594	<	ScrollToNode(TIBTreeNode(Node));
595	<	end;
596	<
597	<	function TIBTreeView.CreateNode: TTreeNode;
598	<	var
599	<	NewNodeClass: TTreeNodeClass;
600	<	begin
601	<	Result := nil;
602	<	if Assigned(OnCustomCreateItem) then
603	<	OnCustomCreateItem(Self, Result);
604	<	if Result = nil then
605	<	begin
606	<	NewNodeClass:=TIBTreeNode;
607	<	if Assigned(OnCreateNodeClass) then
608	<	OnCreateNodeClass(Self,NewNodeClass);
609	<	Result := NewNodeClass.Create(Items);
610	<	end;
611	<	end;
612	<
613	<	function TIBTreeView.CanEdit(Node: TTreeNode): Boolean;
614	<	begin
615	<	Result := inherited CanEdit(Node)
616	<	and assigned(DataSet) and not DataSet.FieldByName(TextField).ReadOnly
617	<	end;
618	<
619	<	procedure TIBTreeView.Expand(Node: TTreeNode);
620	<	begin
621	<	inherited Expand(Node);
622	<	if Node.HasChildren and assigned(DataSet) and (Node.GetFirstChild = nil) then
623	<	begin
624	<	FExpandNode := Node;
625	<	DataSet.Active := false;
626	<	DataSet.Active := true;
627	<	if assigned(Selected) then
628	<	ScrollToNode(TIBTreeNode(Selected))
629	<	end;
630	<	end;
631	<
632	<	procedure TIBTreeView.IBControlLinkChanged;
633	<	begin
634	<	if assigned(DataSource) and (DataSource.DataSet <> nil) and (DataSource.DataSet is TIBParserDataset) then
635	<	FIBTreeViewControllink.IBDataSet := TIBCustomDataSet(DataSource.DataSet)
636	<	else
637	<	FIBTreeViewControllink.IBDataSet := nil;
638	<	end;
639	<
640	<	procedure TIBTreeView.Loaded;
641	<	begin
642	<	inherited Loaded;
643	<	IBControlLinkChanged;
644	<	Reinitialise
645	<	end;
646	<
647	<	procedure TIBTreeView.NodeChanged(Node: TTreeNode;
648	<	ChangeEvent: TTreeNodeChangeReason);
649	<	begin
650	<	inherited NodeChanged(Node, ChangeEvent);
651	<	if not FNoAddNodeToDataset and not FUpdating then
652	<	case ChangeEvent of
653	<	ncTextChanged:
654	<	NodeUpdated(Node);
655	<	ncParentChanged:
656	<	NodeMoved(Node);
657	<	end;
146	>	begin
147	>	Parser.Add2WhereClause(GetRelationNameQualifier + '"' + ParentField + '" = :IBX_PARENT_VALUE');
148	>	Parser.Add2WhereClause(GetRelationNameQualifier + '"' + KeyField + '" = :IBX_PARENT_VALUE',true);
149	>	end;
150		end;
151
152	<	procedure TIBTreeView.Notification(AComponent: TComponent; Operation: TOperation
661	<	);
152	>	procedure TIBTreeView.DataSourceChanged;
153		begin
154	<	inherited Notification(AComponent, Operation);
155	<	if (Operation = opRemove) and
156	<	(FDataLink <> nil) and (AComponent = DataSource) then
157	<	DataSource := nil;
154	>	if assigned(DataSource) and (DataSource.DataSet <> nil) and (DataSource.DataSet is TIBParserDataset) then
155	>	FIBTreeViewControllink.IBDataSet := TIBCustomDataSet(DataSource.DataSet)
156	>	else
157	>	FIBTreeViewControllink.IBDataSet := nil;
158		end;
159
160	<	procedure TIBTreeView.Reinitialise;
160	>	procedure TIBTreeView.RefreshDataset;
161		begin
162	<	if [csDesigning,csLoading] * ComponentState <> [] then Exit;
163	<	FLastSelected := GetNodePath(Selected);
673	<	Items.Clear;
162	>	DataSet.Active := false;
163	>	DataSet.Active := true;
164		end;
165
166		constructor TIBTreeView.Create(TheComponent: TComponent);
167		begin
168		inherited Create(TheComponent);
679	–	FDataLink := TIBTreeViewDatalink.Create(self);
169		FIBTreeViewControlLink := TIBTreeViewControlLink.Create(self);
170		end;
171
172		destructor TIBTreeView.Destroy;
173		begin
685	–	if assigned(FDataLink) then FDataLink.Free;
174		if assigned(FIBTreeViewControlLink) then FIBTreeViewControlLink.Free;
175		inherited Destroy;
176		end;
177
690	–	function TIBTreeView.FindNode(KeyValuePath: array of variant;
691	–	SelectNode: boolean): TIBTreeNode;
692	–	var Node: TTreeNode;
693	–	i,j: integer;
694	–	begin
695	–	Result := nil;
696	–	FLocatingNode := true;
697	–	try
698	–	for j := 0 to Items.TopLvlCount - 1 do
699	–	begin
700	–	Node := Items.TopLvlItems[j];
701	–	i := 0;
702	–	Node.Expand(false);
703	–	while assigned(Node)  do
704	–	begin
705	–	if TIBTreeNode(Node).KeyValue = KeyValuePath[i] then
706	–	begin
707	–	Inc(i);
708	–	if i = Length(KeyValuePath) then
709	–	begin
710	–	Result := TIBTreeNode(Node);
711	–	if SelectNode then
712	–	Selected := Node;
713	–	Exit
714	–	end
715	–	else
716	–	begin
717	–	Node.Expand(false);
718	–	Node := Node.GetFirstChild;
719	–	end
720	–	end
721	–	else
722	–	Node := Node.GetNextSibling
723	–	end
724	–	end
725	–	finally
726	–	FLocatingNode := false
727	–	end
728	–	end;
729	–
730	–	function TIBTreeView.FindNode(KeyValue: variant): TIBTreeNode;
731	–	var i: integer;
732	–	begin
733	–	Result := nil;
734	–	if (Selected <> nil) and (TIBTreeNode(Selected).KeyValue = KeyValue) then
735	–	Result := TIBTreeNode(Selected)
736	–	else
737	–	{Find it the hard way}
738	–	begin
739	–	FullExpand;
740	–	for i := 0 to Items.Count -1 do
741	–	if TIBTreeNode(Items[i]).KeyValue = KeyValue then
742	–	begin
743	–	Result := TIBTreeNode(Items[i])
744	–	end;
745	–	end;
746	–	end;
747	–
748	–	function TIBTreeView.GetNodePath(Node: TTreeNode): TVariantArray;
749	–	var aParent: TTreeNode;
750	–	i: integer;
751	–	begin
752	–	if not assigned(Node) or not (Node is TIBTreeNode) then
753	–	SetLength(Result,0)
754	–	else
755	–	begin
756	–	{Count length of Path}
757	–	i := 1;
758	–	aParent := Node.Parent;
759	–	while (aParent <> nil) do
760	–	begin
761	–	Inc(i);
762	–	aParent := aParent.Parent
763	–	end;
764	–
765	–	{Save Path}
766	–	Setlength(Result,i);
767	–	while i > 0 do
768	–	begin
769	–	Dec(i);
770	–	Result[i] := TIBTreeNode(Node).KeyValue;
771	–	Node := Node.Parent
772	–	end;
773	–	end;
774	–	end;
775	–
776	–	{ TIBTreeViewDatalink }
777	–
778	–	procedure TIBTreeViewDatalink.ActiveChanged;
779	–	begin
780	–	FOwner.ActiveChanged(self)
781	–	end;
782	–
783	–	procedure TIBTreeViewDatalink.DataSetChanged;
784	–	begin
785	–	FOwner.DataSetChanged(self)
786	–	end;
787	–
788	–	procedure TIBTreeViewDatalink.RecordChanged(Field: TField);
789	–	begin
790	–	FOwner.RecordChanged(self,Field);
791	–	end;
792	–
793	–	procedure TIBTreeViewDatalink.UpdateData;
794	–	begin
795	–	FOwner.UpdateData(self)
796	–	end;
797	–
798	–	constructor TIBTreeViewDatalink.Create(AOwner: TIBTreeView);
799	–	begin
800	–	inherited Create;
801	–	FOwner := AOwner
802	–	end;
803	–
178		end.

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