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

Comparing ibx/trunk/ibcontrols/IBLookupComboEditBox.pas (file contents):
Revision 80 by tony, Mon Jan 1 11:31:07 2018 UTC vs.
Revision 263 by tony, Thu Dec 6 15:55:01 2018 UTC

#	Line 30 | Line 30 | unit IBLookupComboEditBox;
30		interface
31
32		uses
33	<	Classes, SysUtils, LResources, Forms, Controls, Graphics, Dialogs, DbCtrls,
33	>	Classes, SysUtils, LCLType, LResources, Forms, Controls, Graphics, Dialogs, DbCtrls,
34		ExtCtrls, IBSQLParser, DB, StdCtrls, IBCustomDataSet, LCLVersion;
35
36		type
#	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 96 | Line 96 | type
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 116 | Line 117 | type
117		procedure CheckAndInsert;
118		procedure DoEnter; override;
119		procedure DoExit; override;
120	+	{$if lcl_fullversion >= 2000000}
121	+	{Deferred update changes in Lazarus 2.0 stop the combo box working when
122	+	the datasource is nil. We thus have to reverse out the changes :(}
123	+	function DoEdit: boolean; override;
124	+	procedure Change; override;
125	+	procedure CloseUp; override;
126	+	procedure Select; override;
127	+	procedure UTF8KeyPress(var UTF8Key: TUTF8Char); override;
128	+	{$ifend}
129		procedure KeyUp(var Key: Word; Shift: TShiftState); override;
130		procedure Loaded; override;
131		procedure Notification(AComponent: TComponent; Operation: TOperation); override;
132		procedure SetItemIndex(const Val: integer); override;
133		function SQLSafe(aText: string): string;
134		procedure UpdateShowing; override;
135	<
135	>	procedure UpdateData(Sender: TObject); override;
136		public
137		{ Public declarations }
138		constructor Create(TheComponent: TComponent); override;
#	Line 146 | Line 156 | type
156
157		implementation
158
159	<	uses IBQuery, LCLType, Variants, LCLProc, LazUTF8;
159	>	uses Variants, LCLProc, LazUTF8;
160
161		{ TIBLookupControlLink }
162
#	Line 168 | Line 178 | begin
178		FOwner.ActiveChanged(self)
179		end;
180
181	+	procedure TIBLookupComboDataLink.DataEvent(Event: TDataEvent; Info: Ptrint);
182	+	begin
183	+	inherited DataEvent(Event, Info);
184	+	if Event = deLayoutChange then
185	+	FOwner.LookupCache := FOwner.LookupCache; {sneaky way of calling UpdateLookup}
186	+	end;
187	+
188		procedure TIBLookupComboDataLink.RecordChanged(Field: TField);
189		begin
190		FOwner.RecordChanged(self,Field);
#	Line 187 | Line 204 | end;
204		{ TIBLookupComboEditBox }
205
206		procedure TIBLookupComboEditBox.HandleTimer(Sender: TObject);
190	–	var ActiveState: boolean;
207		begin
208		FTimer.Interval := 0;
209		FFiltered := Text <> '';
#	Line 338 | Line 354 | begin
354		sCompleteText := ListSource.DataSet.FieldByName(ListField).AsString;
355		if (sCompleteText <> FCurText) then
356		begin
357	+	KeyValue := ListSource.DataSet.FieldByName(KeyField).AsVariant;
358		sResultText := sCompleteText;
359		if ((cbactEndOfLineComplete in AutoCompleteText) and
360		(cbactRetainPrefixCase in AutoCompleteText)) then
#	Line 347 | Line 364 | begin
364		end;
365		Text := sResultText;
366		SelStart := iSelStart;
367	<	SelLength := UTF8Length(Text);
367	>	SelLength := UTF8Length(Text) - iSelStart;
368		end;
352	–	KeyValue := ListSource.DataSet.FieldByName(KeyField).AsVariant;
369		end
370		else
371		begin
#	Line 360 | Line 376 | begin
376		finally
377		FUpdating := false
378		end;
379	+	FModified := true;
380		end;
381		end;
382
#	Line 493 | Line 510 | end;
510		procedure TIBLookupComboEditBox.KeyUp(var Key: Word; Shift: TShiftState);
511		begin
512		inherited KeyUp(Key, Shift);
496	–	if Key = VK_RETURN then
497	–	EditingDone
498	–	else
513		if Key = VK_ESCAPE then
514		begin
515		SelStart := UTF8Length(Text);      {Ensure end of line selection}
#	Line 504 | Line 518 | begin
518		SelectAll;
519		end
520		else
521	+	if AutoComplete and (Style <> csDropDownList) then
522		begin
523	<	FTimer.Interval := 0;
524	<	if (IsEditableTextKey(Key) or (Key = VK_BACK))
525	<	and AutoComplete and (Style <> csDropDownList) and
526	<	(not (cbactEndOfLineComplete in AutoCompleteText) or (SelStart = UTF8Length(Text))) then
523	>	if (Key = VK_BACK) or (Key = VK_DELETE) then
524	>	begin
525	>	if SelStart = 0 then
526	>	begin
527	>	SelStart := UTF8Length(Text);
528	>	SelLength := 0;
529	>	end;
530	>	FTimer.Interval := 0;
531	>	end
532	>	else
533	>	if IsEditableTextKey(Key) and
534	>	(not(cbactEndOfLineComplete in AutoCompleteText) or (SelStart = UTF8Length(Text))) then
535	>	begin
536	>	FTimer.Interval := 0;
537		FTimer.Interval := FKeyPressInterval;
538	+	end;
539		end;
540		end;
541
#	Line 529 | Line 555 | end;
555
556		procedure TIBLookupComboEditBox.SetItemIndex(const Val: integer);
557		begin
558	+	if Val > 0 then
559	+	FCurText := '';
560		inherited SetItemIndex(Val);
561		FLastKeyValue := KeyValue;
562		end;
#	Line 551 | Line 579 | begin
579		ActiveChanged(nil);
580		end;
581
582	+	procedure TIBLookupComboEditBox.UpdateData(Sender: TObject);
583	+	begin
584	+	inherited UpdateData(Sender);
585	+	if FCurText <> '' then
586	+	Text := FCurText + Text;
587	+	FModified := false;
588	+	end;
589	+
590	+	{$if lcl_fullversion >= 2000000}
591	+	type
592	+
593	+	{ THackedCustomComboBox }
594	+
595	+	THackedCustomComboBox = class(TCustomComboBox)
596	+	private
597	+	procedure CallUTF8KeyPress(var UTF8Key: TUTF8Char);
598	+	procedure CallChange;
599	+	end;
600	+
601	+	{ THackedCustomComboBox }
602	+
603	+	procedure THackedCustomComboBox.CallUTF8KeyPress(var UTF8Key: TUTF8Char);
604	+	begin
605	+	inherited UTF8KeyPress(UTF8Key);
606	+	end;
607	+
608	+	procedure THackedCustomComboBox.CallChange;
609	+	begin
610	+	inherited Change;
611	+	end;
612	+
613	+	procedure TIBLookupComboEditBox.UTF8KeyPress(var UTF8Key: TUTF8Char);
614	+	begin
615	+	{TDBLookupComboBox.UTF8KeyPress will swallow the character if
616	+	the datalink is not editable. hence to enable writing we must override it}
617	+	if ((DataSource = nil) or (Field = nil)) and not ReadOnly then
618	+	THackedCustomComboBox(self).CallUTF8KeyPress(UTF8Key)
619	+	else
620	+	inherited;
621	+	end;
622	+
623	+	procedure TIBLookupComboEditBox.Change;
624	+	begin
625	+	THackedCustomComboBox(self).CallChange;
626	+	end;
627	+
628	+	procedure TIBLookupComboEditBox.CloseUp;
629	+	begin
630	+	inherited CloseUp;
631	+	inherited DoEdit;
632	+	end;
633	+
634	+	procedure TIBLookupComboEditBox.Select;
635	+	begin
636	+	inherited Select;
637	+	inherited DoEdit;
638	+	end;
639	+
640	+	function TIBLookupComboEditBox.DoEdit: boolean;
641	+	begin
642	+	{DoEdit will swallow characters if no editable Field. Hence, to enabled
643	+	writing we must avoid calling the inherited method.}
644	+	if ((DataSource = nil) or (Field = nil)) and not ReadOnly then
645	+	Result := true
646	+	else
647	+	Result := inherited DoEdit;
648	+	end;
649	+	{$ifend}
650	+
651		constructor TIBLookupComboEditBox.Create(TheComponent: TComponent);
652		begin
653		inherited Create(TheComponent);
#	Line 583 | Line 680 | begin
680		FForceAutoComplete := false;
681		end;
682		CheckAndInsert;
683	+	FCurText := '';
684	+	if FModified then
685	+	Change; {ensure Update}
686		inherited EditingDone;
687		end;
688

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