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root/public/ibx/trunk/ibcontrols/IBLookupComboEditBox.pas

Comparing ibx/trunk/ibcontrols/IBLookupComboEditBox.pas (file contents):
Revision 31 by tony, Tue Jul 14 15:31:25 2015 UTC vs.
Revision 268 by tony, Fri Dec 28 11:36:35 2018 UTC

#	Line 30 | Line 30 | unit IBLookupComboEditBox;
30		interface
31
32		uses
33	<	Classes, SysUtils, LResources, Forms, Controls, Graphics, Dialogs, DbCtrls,
34	<	ExtCtrls, IBSQLParser, DB, StdCtrls, IBCustomDataSet;
33	>	Classes, SysUtils, LCLType, LResources, Forms, Controls, Graphics, Dialogs, DbCtrls,
34	>	ExtCtrls, IBSQLParser, DB, StdCtrls, IBCustomDataSet, LCLVersion;
35
36		type
37
#	Line 54 | Line 54 | type
54		FOwner: TIBLookupComboEditBox;
55		protected
56		procedure ActiveChanged; override;
57	+	procedure DataEvent(Event: TDataEvent; Info: Ptrint); override;
58		procedure RecordChanged(Field: TField); override;
59		procedure UpdateData; override;
60		public
#	Line 76 | Line 77 | type
77
78		TIBLookupComboEditBox = class(TDBLookupComboBox)
79		private
79	–	FCanAutoInsert: TCanAutoInsert;
80		{ Private declarations }
81		FDataLink: TIBLookupComboDataLink;
82		FIBLookupControlLink: TIBLookupControlLink;
#	Line 92 | Line 92 | type
92		FUpdating: boolean;
93		FInserting: boolean;
94		FExiting: boolean;
95	+	FForceAutoComplete: boolean;
96	+	FInCheckAndInsert: boolean;
97		FLastKeyValue: variant;
98	+	FCurText: string;
99	+	FModified: boolean;
100		procedure DoActiveChanged(Data: PtrInt);
101		function GetAutoCompleteText: TComboBoxAutoCompleteText;
102		function GetListSource: TDataSource;
#	Line 113 | Line 117 | type
117		procedure CheckAndInsert;
118		procedure DoEnter; override;
119		procedure DoExit; override;
120	+	{$if lcl_fullversion >= 2000003}
121	+	{Deferred update changes in Lazarus 2.0 stop the combo box working when
122	+	the datasource is nil. We thus have to reverse out the changes :(}
123	+	function DoEdit: boolean; override;
124	+	procedure Change; override;
125	+	procedure CloseUp; override;
126	+	procedure Select; override;
127	+	{$ifend}
128		procedure KeyUp(var Key: Word; Shift: TShiftState); override;
129		procedure Loaded; override;
130		procedure Notification(AComponent: TComponent; Operation: TOperation); override;
131		procedure SetItemIndex(const Val: integer); override;
132		function SQLSafe(aText: string): string;
133		procedure UpdateShowing; override;
134	<
134	>	procedure UpdateData(Sender: TObject); override;
135		public
136		{ Public declarations }
137		constructor Create(TheComponent: TComponent); override;
#	Line 143 | Line 155 | type
155
156		implementation
157
158	<	uses IBQuery, LCLType, Variants, LCLProc;
158	>	uses Variants, LCLProc, LazUTF8;
159
160		{ TIBLookupControlLink }
161
#	Line 165 | Line 177 | begin
177		FOwner.ActiveChanged(self)
178		end;
179
180	+	procedure TIBLookupComboDataLink.DataEvent(Event: TDataEvent; Info: Ptrint);
181	+	begin
182	+	inherited DataEvent(Event, Info);
183	+	if Event = deLayoutChange then
184	+	FOwner.LookupCache := FOwner.LookupCache; {sneaky way of calling UpdateLookup}
185	+	end;
186	+
187		procedure TIBLookupComboDataLink.RecordChanged(Field: TField);
188		begin
189		FOwner.RecordChanged(self,Field);
#	Line 184 | Line 203 | end;
203		{ TIBLookupComboEditBox }
204
205		procedure TIBLookupComboEditBox.HandleTimer(Sender: TObject);
187	–	var ActiveState: boolean;
206		begin
207		FTimer.Interval := 0;
208		FFiltered := Text <> '';
#	Line 313 | Line 331 | procedure TIBLookupComboEditBox.UpdateLi
331		var
332		iSelStart: Integer; // char position
333		sCompleteText, sPrefixText, sResultText: string;
316	–	curText: string;
334		begin
335		if assigned(ListSource) and assigned(ListSource.DataSet) and (ListSource.DataSet is TIBCustomDataSet)
336		and ListSource.DataSet.Active then
337		begin
338	+	FCurText := Text;
339		FUpdating := true;
340		try
341		iSelStart := SelStart;//Capture original cursor position
342		if ((iSelStart < UTF8Length(Text)) and
343		(cbactEndOfLineComplete in AutoCompleteText)) then
344		Exit;
327	–	curText := Text;
345		sPrefixText := UTF8Copy(Text, 1, iSelStart);
346		ListSource.DataSet.Active := false;
347		ListSource.DataSet.Active :=  true;
348	<	Text := curText;
349	<	if not FExiting and Focused and (Text <> '')then
348	>	Text := FCurText;
349	>	if not FExiting and (FForceAutoComplete or Focused) and (FCurText <> '')then
350		begin
351		if ListSource.DataSet.Active and (ListSource.DataSet.RecordCount > 0) then
352		begin
353		sCompleteText := ListSource.DataSet.FieldByName(ListField).AsString;
354	<	if (sCompleteText <> Text) then
354	>	if (sCompleteText <> FCurText) then
355		begin
356	+	KeyValue := ListSource.DataSet.FieldByName(KeyField).AsVariant;
357		sResultText := sCompleteText;
358		if ((cbactEndOfLineComplete in AutoCompleteText) and
359		(cbactRetainPrefixCase in AutoCompleteText)) then
#	Line 345 | Line 363 | begin
363		end;
364		Text := sResultText;
365		SelStart := iSelStart;
366	<	SelLength := UTF8Length(Text);
366	>	SelLength := UTF8Length(Text) - iSelStart;
367		end;
368	<	KeyValue := ListSource.DataSet.FieldByName(KeyField).AsVariant;
368	>	end
369	>	else
370	>	begin
371	>	SelStart := iSelStart;
372	>	SelLength := 0;
373		end;
374		end;
375		finally
376		FUpdating := false
377		end;
378	+	FModified := true;
379		end;
380		end;
381
382		procedure TIBLookupComboEditBox.UpdateSQL(Sender: TObject;
383		Parser: TSelectSQLParser);
384		var FieldPosition: integer;
385	+	FilterText: string;
386		begin
387		if FFiltered then
388		begin
389	+	if FUpdating then
390	+	FilterText := FCurText
391	+	else
392	+	FilterText := Text;
393		if cbactSearchCaseSensitive in AutoCompleteText then
394		Parser.Add2WhereClause(GetRelationNameQualifier + '"' + ListField + '" Like ''' +
395	<	SQLSafe(Text) + '%''')
395	>	SQLSafe(FilterText) + '%''')
396		else
397	<	Parser.Add2WhereClause(GetRelationNameQualifier + 'Upper("' + ListField + '") Like Upper(''' +
398	<	SQLSafe(Text) + '%'')');
397	>	Parser.Add2WhereClause('Upper(' + GetRelationNameQualifier + '"' +  ListField + '") Like Upper(''' +
398	>	SQLSafe(FilterText) + '%'')');
399
400	<	end;
401	<	if cbactSearchAscending in AutoCompleteText then
402	<	begin
403	<	FieldPosition := Parser.GetFieldPosition(ListField);
376	<	if FieldPosition = 0 then Exit;
400	>	if cbactSearchAscending in AutoCompleteText then
401	>	begin
402	>	FieldPosition := Parser.GetFieldPosition(ListField);
403	>	if FieldPosition = 0 then Exit;
404
405	<	Parser.OrderByClause := IntToStr(FieldPosition) + ' ascending';
405	>	Parser.OrderByClause := IntToStr(FieldPosition) + ' ascending';
406	>	end;
407		end;
408		end;
409
#	Line 395 | Line 423 | procedure TIBLookupComboEditBox.CheckAnd
423		var Accept: boolean;
424		NewKeyValue: variant;
425		begin
426	<	if AutoInsert and (Text <> '') and assigned(ListSource) and assigned(ListSource.DataSet)
427	<	and ListSource.DataSet.Active and (ListSource.DataSet.RecordCount = 0) then
426	>	if FInCheckAndInsert then Exit;
427	>	FInCheckAndInsert := true;
428		try
429	<	{Is it OK to insert a new list member?}
430	<	Accept := true;
431	<	if assigned(FOnCanAutoInsert) then
432	<	OnCanAutoInsert(self,Text,Accept);
433	<	if not Accept then
434	<	begin
435	<	ResetParser;
436	<	Text := FOriginalTextValue;
437	<	SelectAll;
438	<	Exit;
439	<	end;
429	>	if AutoInsert and (Text <> '') and assigned(ListSource) and assigned(ListSource.DataSet)
430	>	and ListSource.DataSet.Active and (ListSource.DataSet.RecordCount = 0) then
431	>	try
432	>	{Is it OK to insert a new list member?}
433	>	Accept := true;
434	>	if assigned(FOnCanAutoInsert) then
435	>	OnCanAutoInsert(self,Text,Accept);
436	>	if not Accept then
437	>	begin
438	>	ResetParser;
439	>	Text := FOriginalTextValue;
440	>	SelectAll;
441	>	Exit;
442	>	end;
443
444	<	FInserting := true;
445	<	try
446	<	{New Value}
447	<	FFiltered := false;
448	<	if assigned(FOnAutoInsert) then
449	<	begin
450	<	{In an OnAutoInsert handler, the client is expected to insert the new
451	<	row into the List DataSet and to set the KeyValue property to the
452	<	value of the primary key of the new row.}
453	<	OnAutoInsert(self,Text,NewKeyValue);
454	<	end
455	<	else
456	<	begin
457	<	ListSource.DataSet.Append;
458	<	{The new KeyValue should be determined by an external generator or
459	<	in the "OnInsert" handler. If it is the same as the ListField, then
460	<	it will be set from the UpdateLinkData method}
461	<	try
462	<	ListSource.DataSet.Post;
463	<	except
464	<	ListSource.DataSet.Cancel;
465	<	raise;
466	<	end;
467	<	NewKeyValue := ListSource.DataSet.FieldByName(KeyField).AsVariant;
468	<	end;
469	<	Text := ''; {Ensure full list}
470	<	UpdateList;
471	<	KeyValue := NewKeyValue;
472	<	UpdateData(nil); {Force sync with DataField}
473	<	finally
474	<	FInserting := false
475	<	end;
476	<	except
477	<	Text := FOriginalTextValue;
478	<	ResetParser;
479	<	raise;
444	>	FInserting := true;
445	>	try
446	>	{New Value}
447	>	FFiltered := false;
448	>	if assigned(FOnAutoInsert) then
449	>	begin
450	>	{In an OnAutoInsert handler, the client is expected to insert the new
451	>	row into the List DataSet and to set the KeyValue property to the
452	>	value of the primary key of the new row.}
453	>	OnAutoInsert(self,Text,NewKeyValue);
454	>	end
455	>	else
456	>	begin
457	>	ListSource.DataSet.Append;
458	>	{The new KeyValue should be determined by an external generator or
459	>	in the "OnInsert" handler. If it is the same as the ListField, then
460	>	it will be set from the UpdateLinkData method}
461	>	try
462	>	ListSource.DataSet.Post;
463	>	except
464	>	ListSource.DataSet.Cancel;
465	>	raise;
466	>	end;
467	>	NewKeyValue := ListSource.DataSet.FieldByName(KeyField).AsVariant;
468	>	end;
469	>	Text := ''; {Ensure full list}
470	>	UpdateList;
471	>	KeyValue := NewKeyValue;
472	>	UpdateData(nil); {Force sync with DataField}
473	>	finally
474	>	FInserting := false
475	>	end;
476	>	except
477	>	Text := FOriginalTextValue;
478	>	ResetParser;
479	>	raise;
480	>	end;
481	>	finally
482	>	FInCheckAndInsert := false
483		end;
484		end;
485
#	Line 475 | Line 509 | end;
509		procedure TIBLookupComboEditBox.KeyUp(var Key: Word; Shift: TShiftState);
510		begin
511		inherited KeyUp(Key, Shift);
478	–	if Key = VK_RETURN then
479	–	EditingDone
480	–	else
512		if Key = VK_ESCAPE then
513		begin
514		SelStart := UTF8Length(Text);      {Ensure end of line selection}
#	Line 486 | Line 517 | begin
517		SelectAll;
518		end
519		else
520	<	if (IsEditableTextKey(Key) or (Key = VK_BACK))
521	<	and AutoComplete and (Style <> csDropDownList) and
522	<	(not (cbactEndOfLineComplete in AutoCompleteText) or (SelStart = UTF8Length(Text))) then
523	<	FTimer.Interval := FKeyPressInterval
524	<	else
525	<	FTimer.Interval := 0;
520	>	if AutoComplete and (Style <> csDropDownList) then
521	>	begin
522	>	if (Key = VK_BACK) or (Key = VK_DELETE) then
523	>	begin
524	>	if SelStart = 0 then
525	>	begin
526	>	SelStart := UTF8Length(Text);
527	>	SelLength := 0;
528	>	end;
529	>	FTimer.Interval := 0;
530	>	end
531	>	else
532	>	if IsEditableTextKey(Key) and
533	>	(not(cbactEndOfLineComplete in AutoCompleteText) or (SelStart = UTF8Length(Text))) then
534	>	begin
535	>	FTimer.Interval := 0;
536	>	FTimer.Interval := FKeyPressInterval;
537	>	end;
538	>	end;
539		end;
540
541		procedure TIBLookupComboEditBox.Loaded;
#	Line 510 | Line 554 | end;
554
555		procedure TIBLookupComboEditBox.SetItemIndex(const Val: integer);
556		begin
557	+	if Val > 0 then
558	+	FCurText := '';
559		inherited SetItemIndex(Val);
560		FLastKeyValue := KeyValue;
561		end;
#	Line 532 | Line 578 | begin
578		ActiveChanged(nil);
579		end;
580
581	+	procedure TIBLookupComboEditBox.UpdateData(Sender: TObject);
582	+	begin
583	+	inherited UpdateData(Sender);
584	+	if FCurText <> '' then
585	+	Text := FCurText + Text;
586	+	FModified := false;
587	+	end;
588	+
589	+	{$if lcl_fullversion >= 2000003}
590	+	type
591	+
592	+	{ THackedCustomComboBox }
593	+
594	+	THackedCustomComboBox = class(TCustomComboBox)
595	+	private
596	+	procedure CallChange;
597	+	end;
598	+
599	+	{ THackedCustomComboBox }
600	+
601	+	procedure THackedCustomComboBox.CallChange;
602	+	begin
603	+	inherited Change;
604	+	end;
605	+
606	+	procedure TIBLookupComboEditBox.Change;
607	+	begin
608	+	THackedCustomComboBox(self).CallChange;
609	+	end;
610	+
611	+	procedure TIBLookupComboEditBox.CloseUp;
612	+	begin
613	+	inherited CloseUp;
614	+	inherited DoEdit;
615	+	end;
616	+
617	+	procedure TIBLookupComboEditBox.Select;
618	+	begin
619	+	inherited Select;
620	+	inherited DoEdit;
621	+	end;
622	+
623	+	function TIBLookupComboEditBox.DoEdit: boolean;
624	+	begin
625	+	{DoEdit will swallow characters if no editable Field. Hence, to enabled
626	+	writing we must avoid calling the inherited method.}
627	+	if IsUnbound then
628	+	Result := true
629	+	else
630	+	Result := inherited DoEdit;
631	+	end;
632	+	{$ifend}
633	+
634		constructor TIBLookupComboEditBox.Create(TheComponent: TComponent);
635		begin
636		inherited Create(TheComponent);
#	Line 550 | Line 649 | begin
649		if assigned(FDataLink) then FDataLink.Free;
650		if assigned(FIBLookupControlLink) then FIBLookupControlLink.Free;
651		if assigned(FTimer) then FTimer.Free;
652	+	Application.RemoveAsyncCalls(self);
653		inherited Destroy;
654		end;
655
656		procedure TIBLookupComboEditBox.EditingDone;
657		begin
658	+	FForceAutoComplete := true;
659	+	try
660	+	if FTimer.Interval <> 0 then
661	+	HandleTimer(nil);
662	+	finally
663	+	FForceAutoComplete := false;
664	+	end;
665		CheckAndInsert;
666	+	FCurText := '';
667	+	if FModified then
668	+	Change; {ensure Update}
669		inherited EditingDone;
670		end;
671

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