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RxDBGrid - new code for calc footer sum for any dataset

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git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@2714 8e941d3f-bd1b-0410-a28a-d453659cc2b4
This commit is contained in:
alexs75
2013-03-29 18:17:29 +00:00
parent 6e3b508236
commit 596d7cf5d9
1 changed files with 69 additions and 6 deletions
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75
components/rx/rxdbgrid.pas
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@ -846,6 +846,11 @@ begin
Grid.InvalidateCell(I, Row);
end;
type
THackDataLink = class(TDataLink);
THackDataSet = class(TDataSet);
type
{ TRxDBGridLookupComboEditor }
@ -3755,11 +3760,22 @@ end;
procedure TRxDBGrid.CalcStatTotals;
var
P: TBookmark;
DS: TDataSet;
//P: TBookmark;
//DS: TDataSet;
i: integer;
APresent: boolean;
SEA, SEB:TDataSetNotifyEvent;
//SEA, SEB:TDataSetNotifyEvent;
DHL:THackDataLink;
DHS:THackDataSet;
SaveState:TDataSetState;
SavePos:integer;
SaveActiveRecord:integer;
SaveAfterScroll:TDataSetNotifyEvent;
SaveBeforeScroll:TDataSetNotifyEvent;
RCol:TRxColumn;
begin
if (not (FFooterOptions.Active and DatalinkActive)) or (Columns.Count = 0) or
(DataSource.DataSet.RecordCount<=0) then
@ -3777,6 +3793,9 @@ begin
if not APresent then
exit;
Inc(FInProcessCalc);
(*
if Assigned(FSortEngine) and (FSortEngine.EnabledFooterRowsCalc) then
begin
for i := 0 to Columns.Count - 1 do
@ -3787,7 +3806,6 @@ begin
exit;
end;
Inc(FInProcessCalc);
DS := DataSource.DataSet;
;
P := Ds.GetBookMark;
@ -3814,6 +3832,51 @@ begin
DS.AfterScroll:=SEA;
DS.EnableControls;
end;
*)
for i := 0 to Columns.Count - 1 do
TRxColumn(Columns[i]).Footer.ResetTestValue;
DHL:=THackDataLink(Datalink);
DHS:=THackDataSet(DataSource.DataSet);
SaveState:=DHS.SetTempState(dsBrowse);
SaveAfterScroll:=DHS.AfterScroll;
SaveBeforeScroll:=DHS.BeforeScroll;
DHS.AfterScroll:=nil;
DHS.BeforeScroll:=nil;
SaveActiveRecord:=DHL.ActiveRecord;
DHL.ActiveRecord:=0;
SavePos:=DHS.RecNo;
DHS.First;
while not DHS.EOF do
begin
for i:=0 to Columns.Count-1 do
begin
RCol:=TRxColumn(Columns[i]);
if RCol.Footer.ValueType in [fvtSum, fvtAvg, fvtMax, fvtMin] then
RCol.Footer.UpdateTestValueFromVar( DHS.FieldByName(RCol.Footer.FieldName).Value);
end;
DHS.Next;
end;
DHS.RecNo := DHL.RecordCount + SavePos + 1;
while not DHS.BOF do
begin
if SavePos = DHS.RecNo then
break;
DHS.Prior;
end;
DHL.ActiveRecord:=SaveActiveRecord;
DHS.RestoreState(SaveState);
DHS.AfterScroll := SaveAfterScroll;
DHS.BeforeScroll := SaveBeforeScroll;
Dec(FInProcessCalc);
if FInProcessCalc < 0 then
@ -4384,8 +4447,8 @@ begin
exit;
inherited LayoutChanged;
{ if DatalinkActive and (FInProcessCalc = 0) and (Datalink.DataSet.State = dsBrowse) then
CalcStatTotals;}
if DatalinkActive and (FInProcessCalc = 0) and (Datalink.DataSet.State = dsBrowse) then
CalcStatTotals;
end;
procedure TRxDBGrid.SetFocus;