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Comparing ibx/trunk/ibcontrols/IBTreeView.pas (file contents):
Revision 21 by tony, Thu Feb 26 10:33:34 2015 UTC vs.
Revision 217 by tony, Fri Mar 16 10:27:26 2018 UTC

#	Line 15 | Line 15
15		*
16		*  The Initial Developer of the Original Code is Tony Whyman.
17		*
18	<	*  The Original Code is (C) 2011 Tony Whyman, MWA Software
18	>	*  The Original Code is (C) 2015 Tony Whyman, MWA Software
19		*  (http://www.mwasoftware.co.uk).
20		*
21		*  All Rights Reserved.
#	Line 31 | Line 31 | interface
31
32		uses
33		Classes, SysUtils, LResources, Forms, Controls, Graphics, Dialogs, ComCtrls,
34	<	DB, IBSQLParser;
34	>	DB, IBSQLParser, IBCustomDataSet;
35
36		type
37		{
#	Line 52 | Line 52 | type
52		FOwner: TIBTreeView;
53		protected
54		procedure ActiveChanged; override;
55	–	procedure DataEvent(Event: TDataEvent; Info: Ptrint); override;
55		procedure DataSetChanged; override;
56		procedure RecordChanged(Field: TField); override;
57		procedure UpdateData; override;
#	Line 60 | Line 59 | type
59		constructor Create(AOwner: TIBTreeView);
60		end;
61
62	+	{ TIBTreeViewControlLink }
63	+
64	+	TIBTreeViewControlLink = class(TIBControlLink)
65	+	private
66	+	FOwner: TIBTreeView;
67	+	protected
68	+	procedure UpdateSQL(Sender: TObject); override;
69	+	procedure UpdateParams(Sender: TObject); override;
70	+	public
71	+	constructor Create(AOwner: TIBTreeView);
72	+	end;
73	+
74		{ TIBTreeNode }
75
76		TIBTreeNode = class(TTreeNode)
77		private
78		FKeyValue: variant;
79		public
80	+	constructor Create(AnOwner: TTreeNodes); override;
81		procedure DeleteAll;
82		property KeyValue: variant read FKeyValue;
83		end;
#	Line 74 | Line 86 | type
86		private
87		{ Private declarations }
88		FDataLink: TIBTreeViewDatalink;
89	+	FIBTreeViewControlLink: TIBTreeViewControlLink;
90		FHasChildField: string;
91	+	FImageIndexField: string;
92		FKeyField: string;
93	+	FSelectedIndexField: string;
94		FTextField: string;
95		FParentField: string;
96		FExpandNode: TTreeNode;
#	Line 93 | Line 108 | type
108		function GetDataSource: TDataSource;
109		function GetRelationNameQualifier: string;
110		function GetSelectedKeyValue: variant;
111	+	procedure IBControlLinkChanged;
112		procedure NodeMoved(Node: TTreeNode);
113		procedure NodeUpdated(Node: TTreeNode);
114		procedure RecordChanged(Sender: TObject; Field: TField);
115		procedure SetHasChildField(AValue: string);
116	+	procedure SetImageIndexField(AValue: string);
117		procedure SetKeyField(AValue: string);
118	+	procedure SetSelectedIndexField(AValue: string);
119		procedure SetTextField(AValue: string);
120		procedure SetDataSource(AValue: TDataSource);
121		procedure SetParentField(AValue: string);
#	Line 121 | Line 139 | type
139		{ Public declarations }
140		constructor Create(TheComponent: TComponent); override;
141		destructor Destroy; override;
142	<	function FindNode(KeyValuePath: array of variant; SelectNode: boolean): TIBTreeNode; overload;
142	>	function FindNode(KeyValuePath: TVariantArray; SelectNode: boolean): TIBTreeNode; overload;
143		function FindNode(KeyValue: variant): TIBTreeNode; overload;
144		function GetNodePath(Node: TTreeNode): TVariantArray;
145		property DataSet: TDataSet read GetDataSet;
#	Line 153 | Line 171 | type
171		property Images;
172		property Indent;
173		property HasChildField: string read FHasChildField write SetHasChildField;
174	+	property ImageIndexField: string read FImageIndexField write SetImageIndexField;
175	+	property SelectedIndexField: string read FSelectedIndexField write SetSelectedIndexField;
176		property KeyField: string read FKeyField write SetKeyField;
177		property MultiSelect;
178		property MultiSelectStyle;
#	Line 232 | Line 252 | type
252
253		implementation
254
255	<	uses IBQuery,IBCustomDataSet, Variants;
255	>	uses IBQuery,Variants;
256
257		function StrIntListToVar(s: string): TVariantArray;
258		var i, idx: integer;
#	Line 268 | Line 288 | begin
288		raise Exception.Create('Ordinal Type Expected when converting to integer string');
289		end;
290
291	+	{ TIBTreeViewControlLink }
292	+
293	+	constructor TIBTreeViewControlLink.Create(AOwner: TIBTreeView);
294	+	begin
295	+	inherited Create;
296	+	FOwner := AOwner;
297	+	end;
298	+
299	+	procedure TIBTreeViewControlLink.UpdateParams(Sender: TObject);
300	+	begin
301	+	FOwner.UpdateParams(self,TIBParserDataSet(Sender).Parser)
302	+	end;
303	+
304	+	procedure TIBTreeViewControlLink.UpdateSQL(Sender: TObject);
305	+	begin
306	+	FOwner.UpdateSQL(self,TIBParserDataSet(Sender).Parser)
307	+	end;
308	+
309		{ TIBTreeNode }
310
311	+	constructor TIBTreeNode.Create(AnOwner: TTreeNodes);
312	+	begin
313	+	inherited Create(AnOwner);
314	+	FKeyValue := NULL;
315	+	end;
316	+
317		procedure TIBTreeNode.DeleteAll;
318		var Node, NextNode: TTreeNode;
319		begin
#	Line 287 | Line 331 | end;
331		{ TIBTreeView }
332
333		procedure TIBTreeView.ActiveChanged(Sender: TObject);
290	–	var AtTopLevel: boolean;
334		begin
335		if (csDesigning in ComponentState) then Exit;
336	+	IBControlLinkChanged;
337		if assigned(DataSet) and not DataSet.Active then
338		begin
339		if not assigned(FExpandNode) and not assigned(FUpdateNode) then {must really be closing}
#	Line 297 | Line 341 | begin
341		end
342		else
343		begin
300	–	AtTopLevel := Items.TopLvlCount = 0;
344		AddNodes;
345		if not FLocatingNode and (Selected = nil) and (Items.TopLvlCount > 0) then
346		begin
#	Line 321 | Line 364 | begin
364		DataSet.First;
365		while not DataSet.EOF do
366		begin
367	<	Node := Items.AddChild(FExpandNode,DataSet.FieldByName(TextField).AsString);
368	<	TIBTreeNode(Node).FKeyValue := DataSet.FieldByName(KeyField).AsVariant;
369	<	Node.HasChildren := (HasChildField = '') or (DataSet.FieldByName(HasChildField).AsInteger <> 0);
370	<	Inc(ChildCount);
367	>	if (FExpandNode = nil) or (TIBTreeNode(FExpandNode).KeyValue <> DataSet.FieldByName(KeyField).AsVariant) then
368	>	begin
369	>	Node := Items.AddChild(FExpandNode,DataSet.FieldByName(TextField).AsString);
370	>	if ImageIndexField <> '' then
371	>	Node.ImageIndex := DataSet.FieldByName(ImageIndexField).AsInteger;
372	>	if SelectedIndexField <> '' then
373	>	Node.SelectedIndex := DataSet.FieldByName(SelectedIndexField).AsInteger;
374	>	TIBTreeNode(Node).FKeyValue := DataSet.FieldByName(KeyField).AsVariant;
375	>	Node.HasChildren := (HasChildField = '') or (DataSet.FieldByName(HasChildField).AsInteger <> 0);
376	>	Inc(ChildCount);
377	>	end;
378		DataSet.Next
379		end;
380		finally
#	Line 338 | Line 388 | end;
388
389		procedure TIBTreeView.DataSetChanged(Sender: TObject);
390		begin
391	<	//  Reinitialise
391	>	//  Do nothing;
392		end;
393
394		function TIBTreeView.GetDataSet: TDataSet;
#	Line 391 | Line 441 | procedure TIBTreeView.RecordChanged(Send
441		var Node: TIBTreeNode;
442		Destination: TIBTreeNode;
443		begin
444	+	if DataSet.State = dsInsert then Exit;
445	+
446		if assigned(Field) and (Field.FieldName = TextField) then
447		begin
448		Node := FindNode(DataSet.FieldByName(KeyField).AsVariant);
#	Line 405 | Line 457 | begin
457		end;
458		end
459		else
460	+	if assigned(Field) and (Field.FieldName = ImageIndexField) then
461	+	begin
462	+	Node := FindNode(DataSet.FieldByName(KeyField).AsVariant);
463	+	if assigned(Node) then
464	+	begin
465	+	FUpdating := true;
466	+	try
467	+	Node.ImageIndex := Field.AsInteger
468	+	finally
469	+	FUpdating := false
470	+	end;
471	+	end;
472	+	end
473	+	else
474		if assigned(Field) and (Field.FieldName = ParentField) then
475		begin
476		Node := FindNode(DataSet.FieldByName(KeyField).AsVariant);
#	Line 415 | Line 481 | begin
481		else
482		Destination := FindNode(DataSet.FieldByName(ParentField).AsVariant);
483
484	<	if Destination = Node.Parent then Exit;
484	>	if (Destination = nil) or (Destination = Node.Parent) then Exit;
485
486		FUpdating := true;
487		try
#	Line 434 | Line 500 | begin
500		Reinitialise
501		end;
502
503	+	procedure TIBTreeView.SetImageIndexField(AValue: string);
504	+	begin
505	+	if FImageIndexField = AValue then Exit;
506	+	FImageIndexField := AValue;
507	+	Reinitialise
508	+	end;
509	+
510		procedure TIBTreeView.SetKeyField(AValue: string);
511		begin
512		if FKeyField = AValue then Exit;
#	Line 441 | Line 514 | begin
514		Reinitialise
515		end;
516
517	+	procedure TIBTreeView.SetSelectedIndexField(AValue: string);
518	+	begin
519	+	if FSelectedIndexField = AValue then Exit;
520	+	FSelectedIndexField := AValue;
521	+	Reinitialise;
522	+	end;
523	+
524		procedure TIBTreeView.SetTextField(AValue: string);
525		begin
526		if FTextField = AValue then Exit;
#	Line 450 | Line 530 | end;
530
531		procedure TIBTreeView.SetDataSource(AValue: TDataSource);
532		begin
533	<	FDataLink.DataSource := AValue
533	>	FDataLink.DataSource := AValue;
534	>	IBControlLinkChanged;
535		end;
536
537		procedure TIBTreeView.SetParentField(AValue: string);
#	Line 466 | Line 547 | begin
547		if Result then
548		begin
549		if DataSet.Active and (DataSet.RecordCount > 0)
550	<	and (Node.KeyValue = DataSet.FieldByName(KeyField).AsVariant) then Exit;
550	>	and DataSet.Locate(KeyField,Node.KeyValue,[]) then Exit;
551
552		FUpdateNode := Node;
553		try
#	Line 496 | Line 577 | procedure TIBTreeView.UpdateParams(Sende
577		begin
578		if not assigned(FExpandNode) and assigned(FUpdateNode)  then {Scrolling dataset}
579		begin
580	<	if (Sender as TDataLink).DataSet is TIBQuery then
581	<	TIBQuery((Sender as TDataLink).DataSet).ParamByName('IBX_KEY_VALUE').Value :=
580	>	if DataSource.DataSet is TIBQuery then
581	>	TIBQuery(DataSource.DataSet).ParamByName('IBX_KEY_VALUE').Value :=
582		FUpdateNode.KeyValue
583		else
584	<	if (Sender as TDataLink).DataSet is TIBDataSet then
585	<	TIBDataSet((Sender as TDataLink).DataSet).ParamByName('IBX_KEY_VALUE').Value :=
584	>	if DataSource.DataSet is TIBDataSet then
585	>	TIBDataSet(DataSource.DataSet).ParamByName('IBX_KEY_VALUE').Value :=
586		FUpdateNode.KeyValue
587		end
588		else
589		if assigned(FExpandNode) then
590		begin
591	<	if (Sender as TDataLink).DataSet is TIBQuery then
592	<	TIBQuery((Sender as TDataLink).DataSet).ParamByName('IBX_PARENT_VALUE').Value :=
591	>	if DataSource.DataSet is TIBQuery then
592	>	TIBQuery(DataSource.DataSet).ParamByName('IBX_PARENT_VALUE').Value :=
593		TIBTreeNode(FExpandNode).KeyValue
594		else
595	<	if (Sender as TDataLink).DataSet is TIBDataSet then
596	<	TIBDataSet((Sender as TDataLink).DataSet).ParamByName('IBX_PARENT_VALUE').Value :=
595	>	if DataSource.DataSet is TIBDataSet then
596	>	TIBDataSet(DataSource.DataSet).ParamByName('IBX_PARENT_VALUE').Value :=
597		TIBTreeNode(FExpandNode).KeyValue
598		end;
599		end;
#	Line 527 | Line 608 | begin
608		Parser.Add2WhereClause(GetRelationNameQualifier + '"' + FParentField + '" is null')
609		else
610		if assigned(FExpandNode) then
611	+	begin
612		Parser.Add2WhereClause(GetRelationNameQualifier + '"' + FParentField + '" = :IBX_PARENT_VALUE');
613	+	Parser.Add2WhereClause(GetRelationNameQualifier + '"' + FKeyField + '" = :IBX_PARENT_VALUE',true);
614	+	end;
615		end;
616
617		procedure TIBTreeView.Added(Node: TTreeNode);
#	Line 589 | Line 673 | begin
673		FExpandNode := Node;
674		DataSet.Active := false;
675		DataSet.Active := true;
676	<	if assigned(Selected) then
593	<	ScrollToNode(TIBTreeNode(Selected))
676	>	Selected := Node;
677		end;
678		end;
679
680	+	procedure TIBTreeView.IBControlLinkChanged;
681	+	begin
682	+	if assigned(DataSource) and (DataSource.DataSet <> nil) and (DataSource.DataSet is TIBParserDataset) then
683	+	FIBTreeViewControllink.IBDataSet := TIBCustomDataSet(DataSource.DataSet)
684	+	else
685	+	FIBTreeViewControllink.IBDataSet := nil;
686	+	end;
687	+
688		procedure TIBTreeView.Loaded;
689		begin
690		inherited Loaded;
691	+	IBControlLinkChanged;
692		Reinitialise
693		end;
694
#	Line 618 | Line 710 | procedure TIBTreeView.Notification(AComp
710		begin
711		inherited Notification(AComponent, Operation);
712		if (Operation = opRemove) and
713	<	(FDataLink <> nil) and (AComponent = DataSource) then DataSource := nil;
713	>	(FDataLink <> nil) and (AComponent = DataSource) then
714	>	DataSource := nil;
715		end;
716
717		procedure TIBTreeView.Reinitialise;
#	Line 632 | Line 725 | constructor TIBTreeView.Create(TheCompon
725		begin
726		inherited Create(TheComponent);
727		FDataLink := TIBTreeViewDatalink.Create(self);
728	+	FIBTreeViewControlLink := TIBTreeViewControlLink.Create(self);
729		end;
730
731		destructor TIBTreeView.Destroy;
732		begin
733		if assigned(FDataLink) then FDataLink.Free;
734	+	if assigned(FIBTreeViewControlLink) then FIBTreeViewControlLink.Free;
735		inherited Destroy;
736		end;
737
738	<	function TIBTreeView.FindNode(KeyValuePath: array of variant;
739	<	SelectNode: boolean): TIBTreeNode;
738	>	function TIBTreeView.FindNode(KeyValuePath: TVariantArray; SelectNode: boolean
739	>	): TIBTreeNode;
740		var Node: TTreeNode;
741		i,j: integer;
742		begin
743		Result := nil;
744	+	if Length(KeyValuePath) = 0 then Exit;
745	+
746		FLocatingNode := true;
747		try
748		for j := 0 to Items.TopLvlCount - 1 do
#	Line 655 | Line 752 | begin
752		Node.Expand(false);
753		while assigned(Node)  do
754		begin
755	<	if TIBTreeNode(Node).KeyValue = KeyValuePath[i] then
755	>	if not VarIsNull(TIBTreeNode(Node).KeyValue) and
756	>	(TIBTreeNode(Node).KeyValue = KeyValuePath[i]) then
757		begin
758		Inc(i);
759		if i = Length(KeyValuePath) then
#	Line 733 | Line 831 | begin
831		FOwner.ActiveChanged(self)
832		end;
833
736	–	procedure TIBTreeViewDatalink.DataEvent(Event: TDataEvent; Info: Ptrint);
737	–	begin
738	–	if (Event = deCheckBrowseMode) and (Info = 1) and not DataSet.Active then
739	–	begin
740	–	if (DataSet is TIBDataSet) then
741	–	FOwner.UpdateSQL(self,TIBDataSet(DataSet).Parser)
742	–	else
743	–	if (DataSet is TIBQuery) then
744	–	FOwner.UpdateSQL(self,TIBQuery(DataSet).Parser)
745	–	end
746	–	else
747	–	if (Event = deCheckBrowseMode) and (Info = 2) and not DataSet.Active then
748	–	begin
749	–	if (DataSet is TIBDataSet) then
750	–	FOwner.UpdateParams(self,TIBDataSet(DataSet).Parser)
751	–	else
752	–	if (DataSet is TIBQuery) then
753	–	FOwner.UpdateParams(self,TIBQuery(DataSet).Parser)
754	–	end
755	–	else
756	–	inherited DataEvent(Event, Info);
757	–	end;
758	–
834		procedure TIBTreeViewDatalink.DataSetChanged;
835		begin
836		FOwner.DataSetChanged(self)

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