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git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@2708 8e941d3f-bd1b-0410-a28a-d453659cc2b4
115 lines
2.9 KiB
ObjectPascal
115 lines
2.9 KiB
ObjectPascal
unit exsortzeos;
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{$mode objfpc}{$H+}
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interface
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uses
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Classes, SysUtils, DB, RxDBGrid, ZConnection, ZDataset, ZAbstractDataset, ZAbstractRODataset;
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type
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{ TZeosDataSetSortEngine }
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TZeosDataSetSortEngine = 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 ZDbcIntfs, ZVariant;
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type
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THackZeosDS = class(TZAbstractRODataset);
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THackRxColumnFooter = class(TRxColumnFooter);
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procedure TZeosDataSetSortEngine.UpdateFooterRows(ADataSet: TDataSet;
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AGrid: TRxDBGrid);
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var
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RS:IZResultSet;
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CurRow, i: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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RS:=THackZeosDS(ADataSet).ResultSet;
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CurRow:=RS.GetRow;
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RS.First;
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// while not RS.IsLast do
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while not RS.IsAfterLast do
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begin
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for i:=0 to AGrid.Columns.Count-1 do
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begin
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Col:=TRxColumn(AGrid.Columns[i]);
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if THackRxColumnFooter(Col.Footer).ValueType in [fvtSum, fvtAvg, fvtMax, fvtMin] then
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THackRxColumnFooter(Col.Footer).UpdateTestValueFromVar(EncodeVariant(RS.GetValueByName(Col.FieldName)));
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end;
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RS.Next;
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end;
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RS.MoveAbsolute(CurRow);
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end;
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function TZeosDataSetSortEngine.EnabledFooterRowsCalc: boolean;
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begin
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Result:=true;
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end;
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procedure TZeosDataSetSortEngine.Sort(Field:TField; ADataSet:TDataSet; Asc:boolean; SortOptions:TRxSortEngineOptions);
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begin
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if not Assigned(ADataSet) then exit;
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if ADataSet is TZAbstractDataset then
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begin
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TZAbstractDataset(ADataSet).SortedFields:=Field.FieldName;
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if Asc then
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TZAbstractDataset(ADataSet).SortType:=stAscending
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else
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TZAbstractDataset(ADataSet).SortType:=stDescending;
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end;
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end;
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procedure TZeosDataSetSortEngine.SortList(ListField: string;
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ADataSet: TDataSet; Asc: array of boolean; SortOptions: TRxSortEngineOptions);
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var
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S:string;
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i, C:integer;
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begin
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if not Assigned(ADataSet) then exit;
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S:='';
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C:=Pos(';', ListField);
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i:=0;
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while C>0 do
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begin
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if S<>'' then S:=S+';';
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S:=S + Copy(ListField, 1, C-1);
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Delete(ListField, 1, C);
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if (i<=High(Asc)) and (not Asc[i]) then
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S:=S + ' DESC';
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C:=Pos(';', ListField);
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inc(i);
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end;
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if ListField<>'' then
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begin
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if S<>'' then S:=S+';';
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S:=S + ListField;
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if (i<=High(Asc)) and (not Asc[i]) then
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S:=S + ' DESC';
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end;
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(ADataSet as TZAbstractRODataset).SortedFields:=S;
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end;
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initialization
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RegisterRxDBGridSortEngine(TZeosDataSetSortEngine, 'TZReadOnlyQuery');
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RegisterRxDBGridSortEngine(TZeosDataSetSortEngine, 'TZQuery');
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RegisterRxDBGridSortEngine(TZeosDataSetSortEngine, 'TZTable');
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RegisterRxDBGridSortEngine(TZeosDataSetSortEngine, 'TZMacroQuery');
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end.
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