Codejock Developer Community : Scrollbars don't work with many large columns

Scrollbars don't work with many large columns : Thanks,Sergio.

Fri, 08 May 2009 12:17:43 +0000

Author: mdoubson
Subject: 14175
Posted: 08 May 2009 at 12:17pm

Thanks, Sergio.

Scrollbars don't work with many large columns : I never posted the ExpandAll()...

Fri, 08 May 2009 12:10:11 +0000

Author: Sergio
Subject: 14175
Posted: 08 May 2009 at 12:10pm

I never posted the ExpandAll() query.

It was someone else : https://forum.codejock.com/forum_posts.asp?TID=13445&KW=expandall

I found the clue by myself.

Scrollbars don't work with many large columns : For the first thread, I thought...

Fri, 08 May 2009 06:08:42 +0000

Author: Sergio
Subject: 14175
Posted: 08 May 2009 at 6:08am

For the first thread, I thought it was ended and closed. I will look and give you an answer soon.

For the second one, we solved it like that (I can't retrieve it too.) :

     BOOL COverridenXTPReportControl::FFullExpandAll()
     {
          //ExpandAll();   <--------   22.03.2007 - Doesn't work properly (only one level is expanded)

          CXTPReportRows* pRows = GetRows();
          if (pRows)
          {
               CXTPReportRow* pRow;
               for (int i=0; iGetCount(); i++)
               {
                    pRow = pRows->GetAt(i);
                    if (pRow && pRow->HasChildren() && !pRow->IsExpanded())
                    {
                         pRow->SetExpanded(TRUE);
                    }
               }

               return TRUE;
          }

          return FALSE;
     }

Regards,

Scrollbars don't work with many large columns : it was 2 different threads - h...

Thu, 07 May 2009 14:52:34 +0000

Author: mdoubson
Subject: 14175
Posted: 07 May 2009 at 2:52pm

it was 2 different threads - http://forum.codejock.com/forum_posts.asp?TID=13387 (about multi-selection)

and it was another thread about the problem with expand all function which not covered full deep of hierarchy but I can't find it now?

Scrollbars don't work with many large columns : Could you please give me the reference...

Thu, 07 May 2009 12:39:32 +0000

Author: Sergio
Subject: 14175
Posted: 07 May 2009 at 12:39pm

Could you please give me the reference of that post (the link) ?

------

Take a look in the Microsoft MSDN Library - Visual Studio 2008 - CWnd::OnHScroll(...), their example uses 32 bits values with correct implementation (look at the curpos variable).

The new code will work as the previous one, but will just use a 32 bits value as input instead of 16 bits.

Just do this kind of change to your code (do the same for OnVScroll(...)) :

Your code :

     void CXTPReportControl::OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)
     {
          if (pScrollBar != NULL)
          {
               CWnd::OnHScroll(nSBCode, nPos, pScrollBar);
               return;
          }
          int nCurPos = m_nLeftOffset;

          ...

32 bits fix :

     void CXTPReportControl::OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)
     {
          if (pScrollBar != NULL)
          {
               CWnd::OnHScroll(nSBCode, nPos, pScrollBar);
               return;
          }

          // Use 32 bits scrollbar position instead of 16 bits - End
          nPos = GetScrollPos(SB_HORZ);

          int nCurPos = m_nLeftOffset;

          ...

Hope you will agree now and see that you will have no further impacts.

Regards,

Scrollbars don't work with many large columns : In some moment you was interested...

Tue, 05 May 2009 17:47:17 +0000

Author: mdoubson
Subject: 14175
Posted: 05 May 2009 at 5:47pm

In some moment you was interested in Expand-Collapse action with all deep levels covered - I propose you to test current app but you did not try?

Scrollbars don't work with many large columns : Very good - if you make a simple...

Tue, 05 May 2009 09:50:25 +0000

Author: mdoubson
Subject: 14175
Posted: 05 May 2009 at 9:50am

Very good - if you make a simple test case I can try it and if it properly supported any scroll size - we can use it in the Core - I should be sure that it will also works in ActiveX (e.g. for old VB6)

Scrollbars don't work with many large columns : Ok, we will do your job and fix...

Tue, 05 May 2009 09:00:55 +0000

Author: Sergio
Subject: 14175
Posted: 05 May 2009 at 9:00am

Ok, we will do your job and fix your OnHScroll(...) & OnVScroll(...).

Regards,

Scrollbars don't work with many large columns : Right - I think our scroolbar...

Mon, 04 May 2009 11:05:36 +0000

Author: mdoubson
Subject: 14175
Posted: 04 May 2009 at 11:05am

Right - I think our scroolbar based on 16 bit restriction. I don't propose you to modify Core but make desired implementation on App level.

Scrollbars don't work with many large columns : I took a look at your code and...

Mon, 04 May 2009 11:01:04 +0000

Author: Sergio
Subject: 14175
Posted: 04 May 2009 at 11:01am

I took a look at your code and you should not use value "nPos" of the OnHScroll(...)/OnVScroll(...). This value is limited to 16 bits due to the Windows message.

In the OnHScroll(...) & OnVScroll(...) methods, I think you just have to retrieve this value using the GetScrollInfo(...) which will give you a 32 bits value.

We don't make this change because we don't want to have any conflicts with your future changes.

Regards,