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2. In TZeosDataSetSortEngine add metod for for calc total values in RxDBGrid 3. In TZeosDataSetSortEngine add metod for for calc total values in RxDBGrid 4. In TRxMemoryDataSortEngine add metod for for calc total values in RxDBGrid git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@2705 8e941d3f-bd1b-0410-a28a-d453659cc2b4
108 lines
3.5 KiB
ObjectPascal
108 lines
3.5 KiB
ObjectPascal
{ RxDBGrid sort engine module for FBDataSet
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Copyright (C) 2009 Lagunov Aleksey alexs75@hotbox.ru
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This library is free software; you can redistribute it and/or modify it
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under the terms of the GNU Library General Public License as published by
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the Free Software Foundation; either version 2 of the License, or (at your
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option) any later version with the following modification:
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent modules,and
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to copy and distribute the resulting executable under terms of your choice,
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provided that you also meet, for each linked independent module, the terms
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and conditions of the license of that module. An independent module is a
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module which is not derived from or based on this library. If you modify
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this library, you may extend this exception to your version of the library,
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but you are not obligated to do so. If you do not wish to do so, delete this
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exception statement from your version.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
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for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; if not, write to the Free Software Foundation,
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Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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}
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unit exsortfb;
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{$mode objfpc}{$H+}
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interface
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uses
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Classes, SysUtils, DB,
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{$IFDEF FPC}
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RxDBGrid
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{$ELSE}
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exDBGrid
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{$ENDIF}
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;
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type
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{ TFBDataSetSortEngine }
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TFBDataSetSortEngine = class(TRxDBGridSortEngine)
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protected
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procedure UpdateFooterRows(ADataSet:TDataSet; AGrid:TRxDBGrid);override;
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function EnabledFooterRowsCalc:boolean;override;
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public
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procedure Sort(Field:TField; ADataSet:TDataSet; Asc:boolean; SortOptions:TRxSortEngineOptions);override;
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procedure SortList(ListField:string; ADataSet:TDataSet; Asc: array of boolean; SortOptions: TRxSortEngineOptions);override;
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end;
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implementation
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uses FBCustomDataSet;
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type
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THackFBDataSet = class(TFBDataSet);
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THackRxColumnFooter = class(TRxColumnFooter);
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procedure TFBDataSetSortEngine.UpdateFooterRows(ADataSet: TDataSet;
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AGrid: TRxDBGrid);
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var
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i,j:integer;
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Col:TRxColumn;
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begin
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if not Assigned(ADataSet) then exit;
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for i:=0 to ADataSet.RecordCount-1 do
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begin
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for j:=0 to AGrid.Columns.Count-1 do
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begin
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Col:=TRxColumn(AGrid.Columns[j]);
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if THackRxColumnFooter(Col.Footer).ValueType in [fvtSum, fvtAvg, fvtMax, fvtMin] then
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THackRxColumnFooter(Col.Footer).UpdateTestValueFromVar( THackFBDataSet(ADataSet).GetAnyRecField(i, ADataSet.FieldByName(Col.Footer.FieldName)));
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end;
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end;
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end;
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function TFBDataSetSortEngine.EnabledFooterRowsCalc: boolean;
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begin
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Result:=true;
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end;
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procedure TFBDataSetSortEngine.Sort(Field: TField; ADataSet: TDataSet;
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Asc: boolean; SortOptions: TRxSortEngineOptions);
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begin
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if Assigned(ADataSet) then
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(ADataSet as TFBDataSet).SortOnField(Field.FieldName, Asc);
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end;
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procedure TFBDataSetSortEngine.SortList(ListField: string; ADataSet: TDataSet;
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Asc: array of boolean; SortOptions: TRxSortEngineOptions);
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begin
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if Assigned(ADataSet) then
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(ADataSet as TFBDataSet).SortOnFields(ListField, Asc);
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end;
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initialization
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RegisterRxDBGridSortEngine(TFBDataSetSortEngine, 'TFBDataSet');
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end.
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