Problems with vertical scrollbar

Hello,
I have two problems with the vertical scrollbar in the property-grid. I have added two more categories to the GridSample. They only hold one variable height item each. When these categories are expanded and another category will be expanded so that the visible grid becomes bigger than the corresponding window the vertical scrollbar does not appear. The image below shows this problem:


The second problem may have the same cause as the first one. After expanding another category the vertical scrollbar appears but its length is incorrect. When I click it, the scrollbar gets shorter. See the second picture.


It looks like a problem in calculating the correct height of the grid. I hope someone can help me.

Best regards,
   Holger

Hello Oleg,
I am already using XTP v. 9.80 together with Visual Studio 6.0.
I can produce the problem as follows:
I add the following code


to the OnInitDialog-function of CPropertyGridDlg-class (in file PropertyGridDlg.cpp of GridSample, right behind the "Custon Buttons"-category).
Then I run the application, enlarge the window a little bit (currently it has a height of 510  pixel, width doesn't matter), expand the "Height: 72"-category, after that expand the "Height: 144"-category and get no scrollbar but nearly half of the "Height: 144"-item is invisible. If you collapse "Height: 72"-category and expand it again a scrollbar occurs but it has a wrong length as you can see the length of the bar changing, when clicking on it.

BTW if the window is a little bit bigger (lets say height about 520 pixel) no scrollbar occurs when expanding/collapsing "Height: 72"-category ("Height: 144"-category remains expanded). But also half of the "Height: 144"-category is not visible.

Hope this helps you to reproduce the error.

Bye
   Holger

Did you ever find a solution for this problem?

Hello again,

when I add the following code to the OnGridNotify function of the PropertyGrid sample (together with the above mentioned variable heights items) I get a correct scrollbar behavior:

if(wParam == XTP_PGN_ITEMEXPANDCHANGED) {     CXTPPropertyGridItem* pItem = (CXTPPropertyGridItem*)lParam;     if (pItem)     {         pItem->GetGrid()->SetTopIndex(pItem->GetGrid()->GetTopIndex());     } }

I don't know what side effects the above code has, but during debugging the PropertyGrid sample I saw that CListBox::SetTopIndex recalculates the scrollbar. So I just gave it a try. It is not what I would tell a good solution but maybe it can be a hint for the CodeJock team on how to improve the library code.

Bye
   Holger.