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Comparing ibx/trunk/ibcontrols/IBLookupComboEditBox.pas (file contents):
Revision 209 by tony, Wed Mar 14 12:48:51 2018 UTC vs.
Revision 291 by tony, Fri Apr 17 10:26:08 2020 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 +    {$if lcl_fullversion < 2000000}
58      procedure DataEvent(Event: TDataEvent; Info: Ptrint); override;
59 +    {$endif}
60      procedure RecordChanged(Field: TField); override;
61      procedure UpdateData; override;
62    public
# Line 77 | Line 79 | type
79  
80    TIBLookupComboEditBox = class(TDBLookupComboBox)
81    private
80 –    FCanAutoInsert: TCanAutoInsert;
82      { Private declarations }
83      FDataLink: TIBLookupComboDataLink;
84      FIBLookupControlLink: TIBLookupControlLink;
# Line 112 | Line 113 | type
113      procedure UpdateSQL(Sender: TObject; Parser: TSelectSQLParser);
114      procedure HandleEnter(Data: PtrInt);
115      procedure UpdateLinkData(Sender: TObject);
116 +    procedure ValidateListField;
117    protected
118      { Protected declarations }
119      procedure ActiveChanged(Sender: TObject);
120      procedure CheckAndInsert;
121      procedure DoEnter; override;
122      procedure DoExit; override;
123 +    {$if lcl_fullversion >= 2000002}
124 +    {Deferred update changes in Lazarus 2.0 stop the combo box working when
125 +     the datasource is nil. We thus have to reverse out the changes :(}
126 +    function DoEdit: boolean; override;
127 +    procedure Change; override;
128 +    procedure CloseUp; override;
129 +    procedure Select; override;
130 +    {$ifend}
131 +    {$if lcl_fullversion = 2000002}
132 +    procedure UTF8KeyPress(var UTF8Key: TUTF8Char); override;
133 +    {$ifend}
134      procedure KeyUp(var Key: Word; Shift: TShiftState); override;
135      procedure Loaded; override;
136      procedure Notification(AComponent: TComponent; Operation: TOperation); override;
137      procedure SetItemIndex(const Val: integer); override;
125 –    function SQLSafe(aText: string): string;
138      procedure UpdateShowing; override;
139      procedure UpdateData(Sender: TObject); override;
140    public
# Line 148 | Line 160 | type
160  
161   implementation
162  
163 < uses IBQuery, LCLType, Variants, LCLProc, LazUTF8;
163 > uses Variants, LCLProc, LazUTF8, IBUtils, IBMessages;
164  
165   { TIBLookupControlLink }
166  
# Line 170 | Line 182 | begin
182    FOwner.ActiveChanged(self)
183   end;
184  
185 + {$if lcl_fullversion < 2000000}
186   procedure TIBLookupComboDataLink.DataEvent(Event: TDataEvent; Info: Ptrint);
187   begin
188    inherited DataEvent(Event, Info);
189    if Event = deLayoutChange then
190     FOwner.LookupCache := FOwner.LookupCache; {sneaky way of calling UpdateLookup}
191   end;
192 + {$endif}
193  
194   procedure TIBLookupComboDataLink.RecordChanged(Field: TField);
195   begin
# Line 196 | Line 210 | end;
210   { TIBLookupComboEditBox }
211  
212   procedure TIBLookupComboEditBox.HandleTimer(Sender: TObject);
199 – var ActiveState: boolean;
213   begin
214    FTimer.Interval := 0;
215    FFiltered := Text <> '';
# Line 239 | Line 252 | begin
252       and ListSource.DataSet.Active   then
253    begin
254      begin
255 +      ValidateListField;
256        if varIsNull(FLastKeyValue) and (ItemIndex = -1) then
257          KeyValue := ListSource.DataSet.FieldByName(KeyField).AsVariant
258        else
# Line 347 | Line 361 | begin
361               sCompleteText := ListSource.DataSet.FieldByName(ListField).AsString;
362               if (sCompleteText <> FCurText) then
363               begin
364 +               KeyValue := ListSource.DataSet.FieldByName(KeyField).AsVariant;
365                 sResultText := sCompleteText;
366                 if ((cbactEndOfLineComplete in AutoCompleteText) and
367                           (cbactRetainPrefixCase in AutoCompleteText)) then
# Line 356 | Line 371 | begin
371                 end;
372                 Text := sResultText;
373                 SelStart := iSelStart;
374 <               SelLength := UTF8Length(Text);
374 >               SelLength := UTF8Length(Text) - iSelStart;
375               end;
361 –             KeyValue := ListSource.DataSet.FieldByName(KeyField).AsVariant;
376             end
377             else
378             begin
# Line 377 | Line 391 | procedure TIBLookupComboEditBox.UpdateSQ
391    Parser: TSelectSQLParser);
392   var FieldPosition: integer;
393      FilterText: string;
394 +    SQLDialect: integer;
395   begin
396    if FFiltered then
397    begin
# Line 384 | Line 399 | begin
399        FilterText := FCurText
400      else
401        FilterText := Text;
402 +
403 +    if Parser.DataSet <> nil then
404 +      SQLDialect := (Parser.DataSet as TIBCustomDataSet).Database.SQLDialect
405 +    else
406 +      SQLDialect := 1;
407 +
408      if cbactSearchCaseSensitive in AutoCompleteText then
409 <      Parser.Add2WhereClause(GetRelationNameQualifier + '"' + ListField + '" Like ''' +
410 <                                  SQLSafe(FilterText) + '%''')
409 >      Parser.Add2WhereClause(GetRelationNameQualifier + QuoteIdentifierIfNeeded(SQLDialect,ListField) + ' Like ''' +
410 >                                  SQLSafeString(FilterText) + '%''')
411      else
412 <      Parser.Add2WhereClause('Upper(' + GetRelationNameQualifier + '"' +  ListField + '") Like Upper(''' +
413 <                                  SQLSafe(FilterText) + '%'')');
412 >      Parser.Add2WhereClause('Upper(' + GetRelationNameQualifier + QuoteIdentifierIfNeeded(SQLDialect,ListField) + ') Like Upper(''' +
413 >                                  SQLSafeString(FilterText) + '%'')');
414  
415      if cbactSearchAscending in AutoCompleteText then
416      begin
# Line 413 | Line 434 | begin
434      ListSource.DataSet.FieldByName(ListField).AsString := Text
435   end;
436  
437 + {Check to ensure that ListField exists and convert to upper case if necessary}
438 +
439 + procedure TIBLookupComboEditBox.ValidateListField;
440 + var SQLDialect: integer;
441 +    FieldNames: TStringList;
442 + begin
443 +  if (ListSource = nil) or (ListSource.DataSet = nil) then Exit;
444 +  SQLDialect := (ListSource.DataSet as TIBCustomDataSet).Database.SQLDialect;
445 +  FieldNames := TStringList.Create;
446 +  try
447 +    FieldNames.CaseSensitive := true;
448 +    FieldNames.Sorted := true;
449 +    FieldNames.Duplicates := dupError;
450 +    ListSource.DataSet.GetFieldNames(FieldNames);
451 +    if FieldNames.IndexOf(ListField) = -1 then {not found}
452 +    begin
453 +      if (SQLDialect = 3) and (FieldNames.IndexOf(AnsiUpperCase(ListField)) <> - 1) then {normalise to upper case}
454 +        ListField := AnsiUpperCase(ListField)
455 +      else
456 +        IBError(ibxeListFieldNotFound,[ListField])
457 +    end;
458 +  finally
459 +    FieldNames.Free;
460 +  end;
461 + end;
462 +
463   procedure TIBLookupComboEditBox.CheckAndInsert;
464   var Accept: boolean;
465      NewKeyValue: variant;
# Line 503 | Line 550 | end;
550   procedure TIBLookupComboEditBox.KeyUp(var Key: Word; Shift: TShiftState);
551   begin
552    inherited KeyUp(Key, Shift);
506 –  if Key = VK_RETURN then
507 –     EditingDone
508 –  else
553    if Key = VK_ESCAPE then
554    begin
555      SelStart := UTF8Length(Text);      {Ensure end of line selection}
# Line 514 | Line 558 | begin
558      SelectAll;
559    end
560    else
561 +  if AutoComplete and (Style <> csDropDownList) then
562    begin
563 <    FTimer.Interval := 0;
564 <    if (IsEditableTextKey(Key) or (Key = VK_BACK))
565 <       and AutoComplete and (Style <> csDropDownList) and
566 <       (not (cbactEndOfLineComplete in AutoCompleteText) or (SelStart = UTF8Length(Text))) then
563 >    if (Key = VK_BACK) or (Key = VK_DELETE) then
564 >    begin
565 >      if SelStart = 0 then
566 >      begin
567 >        SelStart := UTF8Length(Text);
568 >        SelLength := 0;
569 >      end;
570 >      FTimer.Interval := 0;
571 >    end
572 >    else
573 >    if IsEditableTextKey(Key) and
574 >     (not(cbactEndOfLineComplete in AutoCompleteText) or (SelStart = UTF8Length(Text))) then
575 >    begin
576 >      FTimer.Interval := 0;
577        FTimer.Interval := FKeyPressInterval;
578 +    end;
579    end;
580   end;
581  
# Line 539 | Line 595 | end;
595  
596   procedure TIBLookupComboEditBox.SetItemIndex(const Val: integer);
597   begin
598 +  if Val > 0 then
599 +    FCurText := '';
600    inherited SetItemIndex(Val);
601    FLastKeyValue := KeyValue;
602   end;
603  
546 – function TIBLookupComboEditBox.SQLSafe(aText: string): string;
547 – var I: integer;
548 – begin
549 –  Result := '';
550 –  for I := 1 to length(aText) do
551 –    if aText[I] = '''' then
552 –      Result := Result + ''''''
553 –    else
554 –      Result := Result + aText[I];
555 – end;
556 –
604   procedure TIBLookupComboEditBox.UpdateShowing;
605   begin
606    inherited UpdateShowing;
# Line 564 | Line 611 | end;
611   procedure TIBLookupComboEditBox.UpdateData(Sender: TObject);
612   begin
613    inherited UpdateData(Sender);
614 +  if FCurText <> '' then
615 +    Text := FCurText + Text;
616    FModified := false;
617   end;
618  
619 +
620 + {Workarounds due to bugs in various Lazarus 2.0 release candidates}
621 + {$if lcl_fullversion >= 2000002}
622 + type
623 +
624 +  { THackedCustomComboBox }
625 +
626 +  THackedCustomComboBox = class(TCustomComboBox)
627 +  private
628 +    procedure CallChange;
629 +    procedure CallUTF8KeyPress(var UTF8Key: TUTF8Char);
630 +  end;
631 +
632 + { THackedCustomComboBox }
633 +
634 + procedure THackedCustomComboBox.CallChange;
635 + begin
636 +  inherited Change;
637 + end;
638 +
639 + procedure THackedCustomComboBox.CallUTF8KeyPress(var UTF8Key: TUTF8Char);
640 + begin
641 +  inherited UTF8KeyPress(UTF8Key);
642 + end;
643 +
644 + procedure TIBLookupComboEditBox.Change;
645 + begin
646 +  if DataSource = nil then
647 +    THackedCustomComboBox(self).CallChange
648 +  else
649 +    inherited Change;
650 + end;
651 +
652 + procedure TIBLookupComboEditBox.CloseUp;
653 + begin
654 +  inherited DoEdit;
655 +  inherited CloseUp;
656 +  EditingDone;
657 + end;
658 +
659 + procedure TIBLookupComboEditBox.Select;
660 + begin
661 +  inherited Select;
662 +  if DataSource = nil then
663 +    inherited DoEdit;
664 + end;
665 +
666 + function TIBLookupComboEditBox.DoEdit: boolean;
667 + begin
668 +  {DoEdit will swallow characters if no editable Field. Hence, to enabled
669 +   writing we must avoid calling the inherited method.}
670 +  if DataSource = nil then
671 +    Result := true
672 +  else
673 +    Result := inherited DoEdit;
674 + end;
675 + {$ifend}
676 +
677 + {$if lcl_fullversion = 2000002}
678 + procedure TIBLookupComboEditBox.UTF8KeyPress(var UTF8Key: TUTF8Char);
679 + begin
680 +  if DataSource = nil then
681 +    THackedCustomComboBox(self).CallUTF8KeyPress(UTF8Key)
682 +  else
683 +    inherited;
684 + end;
685 + {$ifend}
686 +
687 +
688   constructor TIBLookupComboEditBox.Create(TheComponent: TComponent);
689   begin
690    inherited Create(TheComponent);
# Line 599 | Line 717 | begin
717      FForceAutoComplete := false;
718    end;
719    CheckAndInsert;
720 +  FCurText := '';
721    if FModified then
722      Change; {ensure Update}
723    inherited EditingDone;

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