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

Comparing ibx/trunk/ibcontrols/IBLookupComboEditBox.pas (file contents):
Revision 29 by tony, Sat May 9 11:37:49 2015 UTC vs.
Revision 278 by tony, Mon Feb 4 13:47:40 2019 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	+	{$if lcl_fullversion < 2000000}
58	+	procedure DataEvent(Event: TDataEvent; Info: Ptrint); override;
59	+	{$endif}
60		procedure RecordChanged(Field: TField); override;
61		procedure UpdateData; override;
62		public
#	Line 76 | Line 79 | type
79
80		TIBLookupComboEditBox = class(TDBLookupComboBox)
81		private
79	–	FCanAutoInsert: TCanAutoInsert;
82		{ Private declarations }
83		FDataLink: TIBLookupComboDataLink;
84		FIBLookupControlLink: TIBLookupControlLink;
#	Line 92 | Line 94 | type
94		FUpdating: boolean;
95		FInserting: boolean;
96		FExiting: boolean;
97	+	FForceAutoComplete: boolean;
98	+	FInCheckAndInsert: boolean;
99		FLastKeyValue: variant;
100	+	FCurText: string;
101	+	FModified: boolean;
102		procedure DoActiveChanged(Data: PtrInt);
103		function GetAutoCompleteText: TComboBoxAutoCompleteText;
104		function GetListSource: TDataSource;
#	Line 113 | Line 119 | type
119		procedure CheckAndInsert;
120		procedure DoEnter; override;
121		procedure DoExit; override;
122	+	{$if lcl_fullversion >= 2000002}
123	+	{Deferred update changes in Lazarus 2.0 stop the combo box working when
124	+	the datasource is nil. We thus have to reverse out the changes :(}
125	+	function DoEdit: boolean; override;
126	+	procedure Change; override;
127	+	procedure CloseUp; override;
128	+	procedure Select; override;
129	+	{$ifend}
130	+	{$if lcl_fullversion = 2000002}
131	+	procedure UTF8KeyPress(var UTF8Key: TUTF8Char); override;
132	+	{$ifend}
133		procedure KeyUp(var Key: Word; Shift: TShiftState); override;
134		procedure Loaded; override;
135		procedure Notification(AComponent: TComponent; Operation: TOperation); override;
136		procedure SetItemIndex(const Val: integer); override;
120	–	function SQLSafe(aText: string): string;
137		procedure UpdateShowing; override;
138	<
138	>	procedure UpdateData(Sender: TObject); override;
139		public
140		{ Public declarations }
141		constructor Create(TheComponent: TComponent); override;
#	Line 143 | Line 159 | type
159
160		implementation
161
162	<	uses IBQuery, LCLType, Variants, LCLProc;
162	>	uses Variants, LCLProc, LazUTF8, IBUtils;
163
164		{ TIBLookupControlLink }
165
#	Line 165 | Line 181 | begin
181		FOwner.ActiveChanged(self)
182		end;
183
184	+	{$if lcl_fullversion < 2000000}
185	+	procedure TIBLookupComboDataLink.DataEvent(Event: TDataEvent; Info: Ptrint);
186	+	begin
187	+	inherited DataEvent(Event, Info);
188	+	if Event = deLayoutChange then
189	+	FOwner.LookupCache := FOwner.LookupCache; {sneaky way of calling UpdateLookup}
190	+	end;
191	+	{$endif}
192	+
193		procedure TIBLookupComboDataLink.RecordChanged(Field: TField);
194		begin
195		FOwner.RecordChanged(self,Field);
#	Line 184 | Line 209 | end;
209		{ TIBLookupComboEditBox }
210
211		procedure TIBLookupComboEditBox.HandleTimer(Sender: TObject);
187	–	var ActiveState: boolean;
212		begin
213		FTimer.Interval := 0;
214		FFiltered := Text <> '';
#	Line 313 | Line 337 | procedure TIBLookupComboEditBox.UpdateLi
337		var
338		iSelStart: Integer; // char position
339		sCompleteText, sPrefixText, sResultText: string;
316	–	curText: string;
340		begin
341		if assigned(ListSource) and assigned(ListSource.DataSet) and (ListSource.DataSet is TIBCustomDataSet)
342		and ListSource.DataSet.Active then
343		begin
344	+	FCurText := Text;
345		FUpdating := true;
346		try
347		iSelStart := SelStart;//Capture original cursor position
348		if ((iSelStart < UTF8Length(Text)) and
349		(cbactEndOfLineComplete in AutoCompleteText)) then
350		Exit;
327	–	curText := Text;
351		sPrefixText := UTF8Copy(Text, 1, iSelStart);
352		ListSource.DataSet.Active := false;
353		ListSource.DataSet.Active :=  true;
354	<	Text := curText;
355	<	if not FExiting and Focused and (Text <> '')then
354	>	Text := FCurText;
355	>	if not FExiting and (FForceAutoComplete or Focused) and (FCurText <> '')then
356		begin
357		if ListSource.DataSet.Active and (ListSource.DataSet.RecordCount > 0) then
358		begin
359		sCompleteText := ListSource.DataSet.FieldByName(ListField).AsString;
360	<	if (sCompleteText <> Text) then
360	>	if (sCompleteText <> FCurText) then
361		begin
362	+	KeyValue := ListSource.DataSet.FieldByName(KeyField).AsVariant;
363		sResultText := sCompleteText;
364		if ((cbactEndOfLineComplete in AutoCompleteText) and
365		(cbactRetainPrefixCase in AutoCompleteText)) then
#	Line 345 | Line 369 | begin
369		end;
370		Text := sResultText;
371		SelStart := iSelStart;
372	<	SelLength := UTF8Length(Text);
372	>	SelLength := UTF8Length(Text) - iSelStart;
373		end;
374	+	end
375	+	else
376	+	begin
377	+	SelStart := iSelStart;
378	+	SelLength := 0;
379		end;
380		end;
381		finally
382		FUpdating := false
383		end;
384	+	FModified := true;
385		end;
386		end;
387
388		procedure TIBLookupComboEditBox.UpdateSQL(Sender: TObject;
389		Parser: TSelectSQLParser);
390		var FieldPosition: integer;
391	+	FilterText: string;
392		begin
393		if FFiltered then
394		begin
395	+	if FUpdating then
396	+	FilterText := FCurText
397	+	else
398	+	FilterText := Text;
399		if cbactSearchCaseSensitive in AutoCompleteText then
400		Parser.Add2WhereClause(GetRelationNameQualifier + '"' + ListField + '" Like ''' +
401	<	SQLSafe(Text) + '%''')
401	>	SQLSafeString(FilterText) + '%''')
402		else
403	<	Parser.Add2WhereClause(GetRelationNameQualifier + 'Upper("' + ListField + '") Like Upper(''' +
404	<	SQLSafe(Text) + '%'')');
403	>	Parser.Add2WhereClause('Upper(' + GetRelationNameQualifier + '"' +  ListField + '") Like Upper(''' +
404	>	SQLSafeString(FilterText) + '%'')');
405
406	<	end;
407	<	if cbactSearchAscending in AutoCompleteText then
408	<	begin
409	<	FieldPosition := Parser.GetFieldPosition(ListField);
375	<	if FieldPosition = 0 then Exit;
406	>	if cbactSearchAscending in AutoCompleteText then
407	>	begin
408	>	FieldPosition := Parser.GetFieldPosition(ListField);
409	>	if FieldPosition = 0 then Exit;
410
411	<	Parser.OrderByClause := IntToStr(FieldPosition) + ' ascending';
411	>	Parser.OrderByClause := IntToStr(FieldPosition) + ' ascending';
412	>	end;
413		end;
414		end;
415
416		procedure TIBLookupComboEditBox.HandleEnter(Data: PtrInt);
417		begin
418	+	if AppDestroying in Application.Flags then Exit;
419		SelectAll
420		end;
421
#	Line 393 | Line 429 | procedure TIBLookupComboEditBox.CheckAnd
429		var Accept: boolean;
430		NewKeyValue: variant;
431		begin
432	<	if AutoInsert and (Text <> '') and assigned(ListSource) and assigned(ListSource.DataSet)
433	<	and ListSource.DataSet.Active and (ListSource.DataSet.RecordCount = 0) then
432	>	if FInCheckAndInsert then Exit;
433	>	FInCheckAndInsert := true;
434		try
435	<	{Is it OK to insert a new list member?}
436	<	Accept := true;
437	<	if assigned(FOnCanAutoInsert) then
438	<	OnCanAutoInsert(self,Text,Accept);
439	<	if not Accept then
440	<	begin
441	<	ResetParser;
442	<	Text := FOriginalTextValue;
443	<	SelectAll;
444	<	Exit;
445	<	end;
435	>	if AutoInsert and (Text <> '') and assigned(ListSource) and assigned(ListSource.DataSet)
436	>	and ListSource.DataSet.Active and (ListSource.DataSet.RecordCount = 0) then
437	>	try
438	>	{Is it OK to insert a new list member?}
439	>	Accept := true;
440	>	if assigned(FOnCanAutoInsert) then
441	>	OnCanAutoInsert(self,Text,Accept);
442	>	if not Accept then
443	>	begin
444	>	ResetParser;
445	>	Text := FOriginalTextValue;
446	>	SelectAll;
447	>	Exit;
448	>	end;
449
450	<	FInserting := true;
451	<	try
452	<	{New Value}
453	<	FFiltered := false;
454	<	if assigned(FOnAutoInsert) then
455	<	begin
456	<	{In an OnAutoInsert handler, the client is expected to insert the new
457	<	row into the List DataSet and to set the KeyValue property to the
458	<	value of the primary key of the new row.}
459	<	OnAutoInsert(self,Text,NewKeyValue);
460	<	end
461	<	else
462	<	begin
463	<	ListSource.DataSet.Append;
464	<	{The new KeyValue should be determined by an external generator or
465	<	in the "OnInsert" handler. If it is the same as the ListField, then
466	<	it will be set from the UpdateLinkData method}
467	<	try
468	<	ListSource.DataSet.Post;
469	<	except
470	<	ListSource.DataSet.Cancel;
471	<	raise;
472	<	end;
473	<	NewKeyValue := ListSource.DataSet.FieldByName(KeyField).AsVariant;
474	<	end;
475	<	Text := ''; {Ensure full list}
476	<	UpdateList;
477	<	KeyValue := NewKeyValue;
478	<	UpdateData(nil); {Force sync with DataField}
479	<	finally
480	<	FInserting := false
481	<	end;
482	<	except
483	<	Text := FOriginalTextValue;
484	<	ResetParser;
485	<	raise;
450	>	FInserting := true;
451	>	try
452	>	{New Value}
453	>	FFiltered := false;
454	>	if assigned(FOnAutoInsert) then
455	>	begin
456	>	{In an OnAutoInsert handler, the client is expected to insert the new
457	>	row into the List DataSet and to set the KeyValue property to the
458	>	value of the primary key of the new row.}
459	>	OnAutoInsert(self,Text,NewKeyValue);
460	>	end
461	>	else
462	>	begin
463	>	ListSource.DataSet.Append;
464	>	{The new KeyValue should be determined by an external generator or
465	>	in the "OnInsert" handler. If it is the same as the ListField, then
466	>	it will be set from the UpdateLinkData method}
467	>	try
468	>	ListSource.DataSet.Post;
469	>	except
470	>	ListSource.DataSet.Cancel;
471	>	raise;
472	>	end;
473	>	NewKeyValue := ListSource.DataSet.FieldByName(KeyField).AsVariant;
474	>	end;
475	>	Text := ''; {Ensure full list}
476	>	UpdateList;
477	>	KeyValue := NewKeyValue;
478	>	UpdateData(nil); {Force sync with DataField}
479	>	finally
480	>	FInserting := false
481	>	end;
482	>	except
483	>	Text := FOriginalTextValue;
484	>	ResetParser;
485	>	raise;
486	>	end;
487	>	finally
488	>	FInCheckAndInsert := false
489		end;
490		end;
491
#	Line 457 | Line 499 | end;
499
500		procedure TIBLookupComboEditBox.DoExit;
501		begin
502	+	if FTimer.Interval <> 0 then
503	+	HandleTimer(nil);
504		FExiting := true;
505		try
506		CheckAndInsert;
#	Line 471 | Line 515 | end;
515		procedure TIBLookupComboEditBox.KeyUp(var Key: Word; Shift: TShiftState);
516		begin
517		inherited KeyUp(Key, Shift);
474	–	if Key = VK_RETURN then
475	–	EditingDone
476	–	else
518		if Key = VK_ESCAPE then
519		begin
520		SelStart := UTF8Length(Text);      {Ensure end of line selection}
#	Line 482 | Line 523 | begin
523		SelectAll;
524		end
525		else
526	<	if (IsEditableTextKey(Key) or (Key = VK_BACK))
527	<	and AutoComplete and (Style <> csDropDownList) and
528	<	(not (cbactEndOfLineComplete in AutoCompleteText) or (SelStart = UTF8Length(Text))) then
529	<	FTimer.Interval := FKeyPressInterval
530	<	else
531	<	FTimer.Interval := 0;
526	>	if AutoComplete and (Style <> csDropDownList) then
527	>	begin
528	>	if (Key = VK_BACK) or (Key = VK_DELETE) then
529	>	begin
530	>	if SelStart = 0 then
531	>	begin
532	>	SelStart := UTF8Length(Text);
533	>	SelLength := 0;
534	>	end;
535	>	FTimer.Interval := 0;
536	>	end
537	>	else
538	>	if IsEditableTextKey(Key) and
539	>	(not(cbactEndOfLineComplete in AutoCompleteText) or (SelStart = UTF8Length(Text))) then
540	>	begin
541	>	FTimer.Interval := 0;
542	>	FTimer.Interval := FKeyPressInterval;
543	>	end;
544	>	end;
545		end;
546
547		procedure TIBLookupComboEditBox.Loaded;
#	Line 506 | Line 560 | end;
560
561		procedure TIBLookupComboEditBox.SetItemIndex(const Val: integer);
562		begin
563	+	if Val > 0 then
564	+	FCurText := '';
565		inherited SetItemIndex(Val);
566		FLastKeyValue := KeyValue;
567		end;
568
513	–	function TIBLookupComboEditBox.SQLSafe(aText: string): string;
514	–	var I: integer;
515	–	begin
516	–	Result := '';
517	–	for I := 1 to length(aText) do
518	–	if aText[I] = '''' then
519	–	Result := Result + ''''''
520	–	else
521	–	Result := Result + aText[I];
522	–	end;
523	–
569		procedure TIBLookupComboEditBox.UpdateShowing;
570		begin
571		inherited UpdateShowing;
#	Line 528 | Line 573 | begin
573		ActiveChanged(nil);
574		end;
575
576	+	procedure TIBLookupComboEditBox.UpdateData(Sender: TObject);
577	+	begin
578	+	inherited UpdateData(Sender);
579	+	if FCurText <> '' then
580	+	Text := FCurText + Text;
581	+	FModified := false;
582	+	end;
583	+
584	+
585	+	{Workarounds due to bugs in various Lazarus 2.0 release candidates}
586	+	{$if lcl_fullversion >= 2000002}
587	+	type
588	+
589	+	{ THackedCustomComboBox }
590	+
591	+	THackedCustomComboBox = class(TCustomComboBox)
592	+	private
593	+	procedure CallChange;
594	+	procedure CallUTF8KeyPress(var UTF8Key: TUTF8Char);
595	+	end;
596	+
597	+	{ THackedCustomComboBox }
598	+
599	+	procedure THackedCustomComboBox.CallChange;
600	+	begin
601	+	inherited Change;
602	+	end;
603	+
604	+	procedure THackedCustomComboBox.CallUTF8KeyPress(var UTF8Key: TUTF8Char);
605	+	begin
606	+	inherited UTF8KeyPress(UTF8Key);
607	+	end;
608	+
609	+	procedure TIBLookupComboEditBox.Change;
610	+	begin
611	+	if DataSource = nil then
612	+	THackedCustomComboBox(self).CallChange
613	+	else
614	+	inherited Change;
615	+	end;
616	+
617	+	procedure TIBLookupComboEditBox.CloseUp;
618	+	begin
619	+	inherited DoEdit;
620	+	inherited CloseUp;
621	+	EditingDone;
622	+	end;
623	+
624	+	procedure TIBLookupComboEditBox.Select;
625	+	begin
626	+	inherited Select;
627	+	if DataSource = nil then
628	+	inherited DoEdit;
629	+	end;
630	+
631	+	function TIBLookupComboEditBox.DoEdit: boolean;
632	+	begin
633	+	{DoEdit will swallow characters if no editable Field. Hence, to enabled
634	+	writing we must avoid calling the inherited method.}
635	+	if DataSource = nil then
636	+	Result := true
637	+	else
638	+	Result := inherited DoEdit;
639	+	end;
640	+	{$ifend}
641	+
642	+	{$if lcl_fullversion = 2000002}
643	+	procedure TIBLookupComboEditBox.UTF8KeyPress(var UTF8Key: TUTF8Char);
644	+	begin
645	+	if DataSource = nil then
646	+	THackedCustomComboBox(self).CallUTF8KeyPress(UTF8Key)
647	+	else
648	+	inherited;
649	+	end;
650	+	{$ifend}
651	+
652	+
653		constructor TIBLookupComboEditBox.Create(TheComponent: TComponent);
654		begin
655		inherited Create(TheComponent);
#	Line 546 | Line 668 | begin
668		if assigned(FDataLink) then FDataLink.Free;
669		if assigned(FIBLookupControlLink) then FIBLookupControlLink.Free;
670		if assigned(FTimer) then FTimer.Free;
671	+	Application.RemoveAsyncCalls(self);
672		inherited Destroy;
673		end;
674
675		procedure TIBLookupComboEditBox.EditingDone;
676		begin
677	+	FForceAutoComplete := true;
678	+	try
679	+	if FTimer.Interval <> 0 then
680	+	HandleTimer(nil);
681	+	finally
682	+	FForceAutoComplete := false;
683	+	end;
684		CheckAndInsert;
685	+	FCurText := '';
686	+	if FModified then
687	+	Change; {ensure Update}
688		inherited EditingDone;
689		end;
690

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