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implementation |
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|
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< |
uses LCLType, Math, LCLIntf, Forms, LCLMessageGlue; |
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> |
uses LCLType, Math, LCLIntf, Forms, LCLMessageGlue, EditBtn, MaskEdit; |
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{ TDBControlGridDataLink } |
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function TRowCache.Render(Control: TWinControl): TBitmap; |
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var Container: TBitmap; |
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– |
Msg: TLMPaint; |
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begin |
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Container := TBitmap.Create; |
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try |
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for i := StartIndex to Length(FList) - 1 do |
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begin |
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FList[i].FState := rcEmpty; |
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FList[i].FBitmap := nil; |
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FList[i].FAlternateColor := altColor; |
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if UseAlternateColors then |
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altColor := not altColor; |
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procedure TRowCache.ClearCache; |
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begin |
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FreeImages(true); |
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SetLength(FList,0); |
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end; |
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function TRowCache.Add2Cache(RecNo: Longint; Control: TWinControl): TBitmap; |
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Dec(RecNo); {Adust to zero base} |
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ExtendCache(RecNo + 1); |
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FList[RecNo].FState := rcPresent; |
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if FList[RecNo].FBitmap <> nil then |
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FList[RecNo].FBitmap.Free; |
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FList[RecNo].FBitmap := Render(Control); |
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Result := FList[RecNo].FBitmap; |
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end; |
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if FList[RecNo].FState = rcPresent then |
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begin |
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FList[RecNo].FBitmap.Free; |
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FList[RecNo].FBitmap := nil; |
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FList[RecNo].FState := rcEmpty; |
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end; |
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end; |
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begin |
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OldFixedRows := FixedRows; |
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Clear; |
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+ |
FRowCache.ClearCache; |
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RowCount := OldFixedRows + 1; |
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if dgpIndicator in FOptions then |
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ColWidths[0]:=12; |
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and ValidDataSet and FDatalink.DataSet.CanModify; |
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end; |
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|
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– |
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procedure TDBControlGrid.DoDrawRow(aRow: integer; aRect: TRect; |
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aState: TGridDrawState); |
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var CachedRow: TBitmap; |
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aRow := integer(Data); |
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FInCacheRefresh := true; |
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if assigned(FDataLink.DataSet) then |
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< |
FDatalink.DataSet.MoveBy(aRow - FDrawRow) |
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> |
FDatalink.DataSet.MoveBy(aRow - FDrawRow); |
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end; |
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procedure TDBControlGrid.DoSetupDrawPanel(Data: PtrInt); |
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Exit; {ignore these keys if we are in a combobox} |
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if (AControl <> nil) and (AControl is TCustomMemo) |
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and (Key = VK_RETURN) then Exit; {Ignore Return in a CustomMemo} |
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and (Key in [VK_RETURN,VK_UP,VK_DOWN]) then Exit; {Ignore Return in a CustomMemo} |
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> |
|
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> |
if (AControl <> nil) and (AControl is TCustomGrid) |
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and (Key in [VK_RETURN,VK_UP,VK_DOWN,VK_TAB]) then Exit; {Ignore Return in a CustomMemo} |
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|
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if (AControl <> nil) and ((AControl is TDateEdit) or (AControl is TCustomMaskedit)) |
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and (Key in [VK_RETURN,VK_UP,VK_DOWN, |
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VK_ESCAPE,VK_LEFT,VK_RIGHT]) then Exit; {Ignore Return in a CustomMemo} |
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Done := false; |
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if assigned(FOnKeyDownHander) then |
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OnKeyDownHander(Sender,Key,Shift,Done); |
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and (FModified or (FRowCache.IsEmpty(aDataSet.RecNo))) then |
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begin |
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RecNo := aDataSet.RecNo; |
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Application.ProcessMessages; {A couple of trips round the message loop seems to be necessary} |
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Application.ProcessMessages; |
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if RecNo = aDataSet.RecNo then {Guard against sudden changes} |
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< |
FRowCache.Add2Cache(aDataSet.RecNo,FDrawPanel); |
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> |
FRowCache.Add2Cache(RecNo,FDrawPanel); |
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end; |
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end; |
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procedure TDBControlGrid.OnDataSetChanged(aDataSet: TDataSet); |
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begin |
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< |
if (aDataSet.State = dsBrowse) and (FLastRecordCount > GetRecordCount) then |
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> |
if aDataSet.State = dsBrowse then |
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begin |
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{must be delete} |
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< |
FRowCache.MarkAsDeleted(FSelectedRecNo); |
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< |
Dec(FSelectedRow); |
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> |
if GetRecordCount = 0 then |
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> |
begin |
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> |
{Must be closed/reopened} |
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> |
FRowCache.ClearCache; |
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> |
FSelectedRow := 0; |
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> |
end |
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> |
else |
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> |
if FLastRecordCount > GetRecordCount then |
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> |
begin |
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> |
{must be delete} |
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> |
FRowCache.MarkAsDeleted(FSelectedRecNo); |
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> |
Dec(FSelectedRow); |
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> |
end; |
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LayoutChanged; |
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end; |
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FLastRecordCount := GetRecordCount; |
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|
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procedure TDBControlGrid.SetupDrawPanel(aRow: integer); |
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begin |
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+ |
if FDrawPanel = nil then Exit; |
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if ValidDataSet and FRowCache.AlternateColor[FDataLink.DataSet.RecNo] then |
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FDrawPanel.Color := AlternateColor |
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else |
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if aCol < FixedCols then |
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DrawIndicator(Canvas,aRow, aRect,GetDataSetState,false) |
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else |
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< |
if FDrawPanel = nil then |
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< |
DrawFillRect(Canvas,aRect) else |
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> |
if (FDrawPanel = nil) or not FDataLink.Active then |
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> |
DrawFillRect(Canvas,aRect) |
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> |
else |
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if not FDrawingActiveRecord and FDataLink.Active then |
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DoDrawRow(aRow,aRect,aState); |
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{if we are drawing the active record then this is rendered by the Draw Panel |
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FInCacheRefresh := false; |
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FCacheRefreshQueued := false; |
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Row := FixedRows; |
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+ |
FDrawingActiveRecord := false; |
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+ |
FSelectedRecNo := 0; |
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+ |
FSelectedRow := 0; |
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FRequiredRecNo := 0; |
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end; |
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FRowCache.UseAlternateColors := AlternateColor <> Color; |
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FRowCache.AltColorStartNormal := AltColorStartNormal; |
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end; |
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|
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end. |
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+ |
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