90 replies to this topic

[Saurman]

Hello, iam using Nextgrid latest version in slide mode.


Sometimes, when i refresh grid content (begin update, remember selection, clear rows, fill with new content, end update, restore selection), selected row is not drawn. It looks just like grid background, but when i scroll or select this row, it fixes.



Also, even if iam using begin update/end update when changing single row content, i still see some blinks (i think they shouldn't appear)

[Boki (Berg)]

Hello Saurman,

If you may send me small demo project, this will help. For first help, maybe you can try to call RefreshSlide(NextGrid1.SelectedRow); but maybe it will be better to we find core of a problem.

Maybe calling BeginUpdate/EndUpdate is not neccessary on small changes. Using this function is more recommended for large operations, such as adding more than 1000 rows and setting cells in same loop.

Best regards

[Saurman]

iam not sure a small demo can repeat this issue. The problem that iam using nextgrid with TMS components, and grid is located in TAdvOfficePager tab. There are also another grids on other tabs. It might be a tms fault with the calling of child's drawling methods (i had this problem with TMemo already)

Anyway, iam attaching piece of code that refreshes grid and grid structure
 scraps.zip   53.89KB   4 downloads

[Boki (Berg)]

Hello Saurman,

Thank you for your sample. I am looking at it. I will probably try to construct my own sample and test it.

Can you please tell me, does adding such line:

CODE

LogGrid.RefreshSlide(LogGrid.SelectedRow);

at the end helps?

Best regards

[Saurman]

i just noticed, it doesnt happen for selected row.
It has something to do with the floating panel on same tab


I have other grids in slide more on other tabs, and they works their just fine. Seams problems is caused by floating panel from TMS pack

[Boki (Berg)]

Hello Saurman,

Not sure what this may be

But, I recommend trying:

CODE

LogGrid.RefreshSlide(LogGrid.SelectedRow);

It should it will help.

Best regards

[Saurman]

k few more problems. See attached files
 bugreport.zip   12.33KB   4 downloads

[Boki (Berg)]

Hello Saurman,

Can you please tell me when this error happen? Unfortunatelly error log don't help me.

Best regards

[Saurman]

well, i have no clue where it happens aswell, and the bugreport doesnt even shows me a line from my unit, that this AV. I can only say, thats its some paint problems

[Boki (Berg)]

Hello Saurman,

Do you maybe can tell me does it happen on some action (like MouseMove over some cell, or click on some button)?

Best regards

[Saurman]

i think if it was called from my procedure, this would be reflected in the attached log. Otherwise it can be only caused by windows redraw messages in some special grid conditions. Maybe we should try to wrap the procedure, that produces AV, inty try/except and log all variables, that directly participate in producing an AV (access violation/exception).

[Boki (Berg)]

Hello Saurman,

Most probably some action like mouse move causes a repaint and this maybe trigger AV. If you may try to move mouse over some cells, maybe AV will jump.

Also, can you please tell me do you use latest release (v4.2.2 or v4.2.1)?

PS. Does this bug (AV) happen in both modes (Report and Slide)?

Best regards

[Saurman]

i got a screenshot from mad except vcl. It takes screenshot just at the moment when AV happens. On that screenshot i see, that grid is empty (which means its been totally redrawn), grid is in slide mode. My grid version - latest free (i think 4.2.1)

Tryed moving mouse all over, working fine. Can i get a recompiled NxGrid.dcu with some events loggin in TNextGrid.GetRowVisible function plz? Iam getting this av once per 4-6 mins in my app. Grid refreshes like once per 20-40 secs.

Btw, seams that av occurs only when grid is located on active tab and visible to user.

I just got 3 more reports during last 10 mins, all is pointing to a same piece of code

CODE

main thread ($c18):
004ed95f +013 ISD_dashboard.exe NxGrid               492  +1 TNextGrid.GetRowVisible
004e7757 +04b ISD_dashboard.exe NxCustomGridControl 1319  +5 TNxCustomGridControl.GetSlideTop
004e72e2 +026 ISD_dashboard.exe NxCustomGridControl 1131  +4 TNxCustomGridControl.GetCellTop
004eb7ae +0aa ISD_dashboard.exe NxCustomGridControl 3318 +10 TNxCustomGridControl.DrawSlideCaption
004eace6 +1d2 ISD_dashboard.exe NxCustomGridControl 3066 +42 TNxCustomGridControl.PaintSlidesRows
004eaab9 +011 ISD_dashboard.exe NxCustomGridControl 3005  +2 TNxCustomGridControl.PaintSlides
004ec4ae +2be ISD_dashboard.exe NxCustomGridControl 3578 +37 TNxCustomGridControl.Paint
004b94cf +057 ISD_dashboard.exe Controls                     TCustomControl.PaintWindow

[Boki (Berg)]

Hello Saurman,

Maybe this function which refresh grid causes a problem?

I will send you now PM.

Best regards

[Saurman]

one more stuff.
When multiselect is True, in slide mode


Any chances to get a normal fill, Boki?

[Boki (Berg)]

Hello Saurman,

Maybe setting aoHighlightSlideCells flag in AppearanceOptions to False may help.

Best regards

[Saurman]

well, this helps but after that Multiselect=true is not working

[Boki (Berg)]

Hello Saurman,

It work, but there is no indication that cells are selected (due to aoHighlightSlideCells) flag.

I will use to draw Slide frame around all selected slides. This will take several days to complete it.

Thank you.

Best regards

[Saurman]

one more issue. If iam using that flag, and changing current page, grid is not fully drawn:


This happens only for selected cell

[Saurman]

as for my first issue:

CODE

function TNextGrid.GetRowVisible(Index: Integer): Boolean;
begin
  try
    if RowExist(Index) then
      Result := FCells.Row[Index].Visible and FCells.Row[Index].Shown
    else
      Result := False;

  except
    on e:Exception do begin
      Result := FCells.Row[Index].Visible and FCells.Row[Index].Shown;
    end;
  end;
end;

function TNextGrid.GetRowHeight(Index: Integer): Integer;
begin
  try
    if RowExist(Index) then
      Result := FCells.Row[Index].RowHeight
    else
      Result := 16;
  except
    on e:Exception do begin
      Result := FCells.Row[Index].RowHeight;
    end;
  end;
  DoMeasuringRowHeight(Index, Result); { event }
end;

Still getting this AV. When debugger attached, it moves me to that lines