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root/public/ibx/branches/journaling/ibcontrols/DBControlGrid.pas

Comparing ibx/trunk/ibcontrols/DBControlGrid.pas (file contents):
Revision 27 by tony, Tue Apr 14 13:10:23 2015 UTC vs.
Revision 143 by tony, Fri Feb 23 12:11:21 2018 UTC

#	Line 1 | Line 1
1	+
2		{
3		/***************************************************************************
4		DBControlGrid.pas
#	Line 97 | Line 98 | type
98		procedure ClearCache;
99		function Add2Cache(RecNo: Longint; Control: TWinControl): TBitmap;
100		function GetRowImage(RecNo, Offset: integer): TBitmap;
101	+	procedure InvalidateRowImage(RecNo: integer);
102		function IsEmpty(RecNo: integer): boolean;
103		procedure MarkAsDeleted(RecNo: integer);
104		property AlternateColor[RecNo: integer]: boolean read GetAlternateColor;
#	Line 151 | Line 153 | type
153		FLastMouseButton: TMouseButton;
154		FLastMouseShiftState: TShiftState;
155
156	+	function ActiveControl: TControl;
157		procedure EmptyGrid;
158		function GetDataSource: TDataSource;
159		function GetRecordCount: Integer;
#	Line 236 | Line 239 | type
239		property Color;
240		property Constraints;
241		property DataSource: TDataSource read GetDataSource write SetDataSource;
239	–	property DefaultRowHeight;
242		property DefaultPositionAtEnd: boolean read  FDefaultPositionAtEnd write FDefaultPositionAtEnd;
243		property DragCursor;
244		property DragMode;
#	Line 284 | Line 286 | end;
286
287		implementation
288
289	<	uses LCLType, Math, LCLIntf, Forms, LCLMessageGlue;
289	>	uses LCLType, Math, LCLIntf, Forms, LCLMessageGlue, EditBtn, MaskEdit;
290
291		{ TDBControlGridDataLink }
292
#	Line 299 | Line 301 | end;
301
302		function TRowCache.Render(Control: TWinControl): TBitmap;
303		var Container: TBitmap;
302	–	Msg: TLMPaint;
304		begin
305		Container := TBitmap.Create;
306		try
#	Line 365 | Line 366 | begin
366		for i := StartIndex to Length(FList) - 1 do
367		begin
368		FList[i].FState := rcEmpty;
369	+	FList[i].FBitmap := nil;
370		FList[i].FAlternateColor := altColor;
371		if UseAlternateColors then
372		altColor := not altColor;
#	Line 412 | Line 414 | end;
414		procedure TRowCache.ClearCache;
415		begin
416		FreeImages(true);
417	+	SetLength(FList,0);
418		end;
419
420		function TRowCache.Add2Cache(RecNo: Longint; Control: TWinControl): TBitmap;
#	Line 420 | Line 423 | begin
423		Dec(RecNo); {Adust to zero base}
424		ExtendCache(RecNo + 1);
425		FList[RecNo].FState := rcPresent;
426	+	if FList[RecNo].FBitmap <> nil then
427	+	FList[RecNo].FBitmap.Free;
428		FList[RecNo].FBitmap := Render(Control);
429		Result := FList[RecNo].FBitmap;
430		end;
#	Line 467 | Line 472 | begin
472		until false;
473		end;
474
475	+	procedure TRowCache.InvalidateRowImage(RecNo: integer);
476	+	begin
477	+	Dec(RecNo); {adjust to zero base}
478	+	if (RecNo < 0) or (RecNo >= Length(FList)) then
479	+	Exit;
480	+
481	+	if FList[RecNo].FState = rcPresent then
482	+	begin
483	+	FList[RecNo].FBitmap.Free;
484	+	FList[RecNo].FBitmap := nil;
485	+	FList[RecNo].FState := rcEmpty;
486	+	end;
487	+	end;
488	+
489		function TRowCache.IsEmpty(RecNo: integer): boolean;
490		begin
491		Dec(RecNo);
#	Line 509 | Line 528 | end;
528
529		{ TDBControlGrid }
530
531	+	function TDBControlGrid.ActiveControl: TControl;
532	+	var AParent: TWinControl;
533	+	begin
534	+	Result := nil;
535	+	AParent := Parent;
536	+	while (AParent <> nil) and  not (AParent is TCustomForm) do
537	+	AParent := AParent.Parent;
538	+	if (AParent <> nil) and (AParent is TCustomForm)then
539	+	Result := TCustomForm(AParent).ActiveControl;
540	+	end;
541	+
542		procedure TDBControlGrid.EmptyGrid;
543		var
544		OldFixedRows: Integer;
545		begin
546		OldFixedRows := FixedRows;
547		Clear;
548	+	FRowCache.ClearCache;
549		RowCount := OldFixedRows + 1;
550		if dgpIndicator in FOptions then
551		ColWidths[0]:=12;
#	Line 567 | Line 598 | begin
598		and ValidDataSet and FDatalink.DataSet.CanModify;
599		end;
600
570	–
601		procedure TDBControlGrid.DoDrawRow(aRow: integer; aRect: TRect;
602		aState: TGridDrawState);
603		var CachedRow: TBitmap;
#	Line 580 | Line 610 | begin
610		begin
611		FCacheRefreshQueued := true;
612		Application.QueueAsyncCall(@DoMoveRecord,PtrInt(aRow));
613	<	end
613	>	end;
614	>	Canvas.FillRect(aRect);
615		end
616		else
617		Canvas.Draw(aRect.Left,aRect.Top,CachedRow)
#	Line 595 | Line 626 | begin
626		aRow := integer(Data);
627		FInCacheRefresh := true;
628		if assigned(FDataLink.DataSet) then
629	<	FDatalink.DataSet.MoveBy(aRow - FDrawRow)
629	>	FDatalink.DataSet.MoveBy(aRow - FDrawRow);
630		end;
631
632		procedure TDBControlGrid.DoSetupDrawPanel(Data: PtrInt);
#	Line 631 | Line 662 | end;
662		procedure TDBControlGrid.KeyDownHandler(Sender: TObject; var Key: Word;
663		Shift: TShiftState);
664		var Done: boolean;
665	+	AControl: TControl;
666		begin
667		if Visible and assigned(FDrawPanel) and FDrawPanel.Visible and FWeHaveFocus then
668		begin
669	+	AControl := ActiveControl;
670	+	if (AControl <> nil) and (AControl is TCustomComboBox)
671	+	and ((Key in [VK_UP,VK_DOWN]) or
672	+	(TCustomComboBox(AControl).DroppedDown and (Key = VK_RETURN)) or
673	+	((TCustomComboBox(AControl).Text <> '') and (Key =  VK_ESCAPE))) then
674	+	Exit; {ignore these keys if we are in a  combobox}
675	+
676	+	if (AControl <> nil) and (AControl is TCustomMemo)
677	+	and (Key in [VK_RETURN,VK_UP,VK_DOWN]) then Exit; {Ignore Return in a CustomMemo}
678	+
679	+	if (AControl <> nil) and (AControl is TCustomGrid)
680	+	and (Key in [VK_RETURN,VK_UP,VK_DOWN,VK_TAB]) then Exit; {Ignore Return in a CustomMemo}
681	+
682	+	if (AControl <> nil) and ((AControl is TDateEdit) or (AControl is TCustomMaskedit))
683	+	and (Key in [VK_RETURN,VK_UP,VK_DOWN,
684	+	VK_ESCAPE,VK_LEFT,VK_RIGHT]) then Exit; {Ignore Return in a CustomMemo}
685		Done := false;
686		if assigned(FOnKeyDownHander) then
687		OnKeyDownHander(Sender,Key,Shift,Done);
#	Line 655 | Line 703 | begin
703		and (FModified or (FRowCache.IsEmpty(aDataSet.RecNo))) then
704		begin
705		RecNo := aDataSet.RecNo;
658	–	Application.ProcessMessages;  {A couple of trips round the message loop seems to be necessary}
706		Application.ProcessMessages;
707		if RecNo = aDataSet.RecNo then   {Guard against sudden changes}
708	<	FRowCache.Add2Cache(aDataSet.RecNo,FDrawPanel);
708	>	FRowCache.Add2Cache(RecNo,FDrawPanel);
709		end;
710		end;
711
712		procedure TDBControlGrid.OnDataSetChanged(aDataSet: TDataSet);
713		begin
714	<	if (aDataSet.State = dsBrowse) and (FLastRecordCount >  GetRecordCount) then
714	>	if aDataSet.State = dsBrowse then
715		begin
716	<	{must be delete}
717	<	FRowCache.MarkAsDeleted(FSelectedRecNo);
718	<	Dec(FSelectedRow);
716	>	if GetRecordCount = 0 then
717	>	begin
718	>	{Must be closed/reopened}
719	>	FRowCache.ClearCache;
720	>	FSelectedRow := 0;
721	>	end
722	>	else
723	>	if FLastRecordCount >  GetRecordCount then
724	>	begin
725	>	{must be delete}
726	>	FRowCache.MarkAsDeleted(FSelectedRecNo);
727	>	Dec(FSelectedRow);
728	>	end;
729		LayoutChanged;
730		end;
731		FLastRecordCount := GetRecordCount;
#	Line 765 | Line 822 | begin
822		RemoveFreeNotification(FDrawPanel);
823		FDrawPanel.RemoveAllHandlersOfObject(self);
824		theForm := Parent;
825	<	while not (theForm is TCustomForm) and (theForm.Parent <> nil) do
825	>	while not ((theForm is TCustomForm) or (theForm is TCustomFrame))
826	>	and (theForm.Parent <> nil) do
827		theForm := theForm.Parent;
828		FDrawPanel.Parent := theForm;
829		end;
#	Line 782 | Line 840 | begin
840		FDrawPanel.Visible := false;
841		FRowCache.Height := FDrawPanel.Height;
842		FRowCache.Width := FDrawPanel.Width;
843	<	AddHandlerOnResize(@OnDrawPanelResize);
843	>	FDrawPanel.AddHandlerOnResize(@OnDrawPanelResize);
844		FreeNotification(FDrawPanel);
845		end;
846		except
#	Line 806 | Line 864 | end;
864
865		procedure TDBControlGrid.SetupDrawPanel(aRow: integer);
866		begin
867	+	if FDrawPanel = nil then Exit;
868		if ValidDataSet and FRowCache.AlternateColor[FDataLink.DataSet.RecNo] then
869		FDrawPanel.Color := AlternateColor
870		else
#	Line 1125 | Line 1184 | begin
1184		if aCol < FixedCols then
1185		DrawIndicator(Canvas,aRow, aRect,GetDataSetState,false)
1186		else
1187	+	if (FDrawPanel = nil) or not FDataLink.Active then
1188	+	DrawFillRect(Canvas,aRect)
1189	+	else
1190		if not FDrawingActiveRecord and FDataLink.Active then
1191		DoDrawRow(aRow,aRect,aState);
1192		{if we are drawing the active record then this is rendered by the Draw Panel
#	Line 1370 | Line 1432 | begin
1432		FInCacheRefresh := false;
1433		FCacheRefreshQueued := false;
1434		Row := FixedRows;
1435	+	FDrawingActiveRecord := false;
1436	+	FSelectedRecNo := 0;
1437	+	FSelectedRow := 0;
1438	+	FRequiredRecNo := 0;
1439		end;
1440		FRowCache.UseAlternateColors := AlternateColor <> Color;
1441		FRowCache.AltColorStartNormal := AltColorStartNormal;
#	Line 1559 | Line 1625 | begin
1625		PrevRow := Row;
1626		Row := FDrawRow;
1627		if not FInCacheRefresh then
1628	+	begin
1629		FSelectedRow := FDrawRow;
1630	+	if FDatalink.DataSet.State <> dsInsert then
1631	+	FRowCache.InvalidateRowImage(FSelectedRecNo);
1632	+	end;
1633		InvalidateRow(PrevRow);
1634		SetupDrawPanel(FDrawRow);
1635		end;
#	Line 1621 | Line 1691 | begin
1691		FDataLink.Free;
1692		end;
1693		if assigned(FRowCache) then FRowCache.Free;
1694	+	Application.RemoveAsyncCalls(self);
1695		inherited Destroy;
1696		end;
1697
#	Line 1659 | Line 1730 | begin
1730		end;
1731
1732		end.
1733	+

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