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CFormView and ScrollBars
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AliRafiee View Drop Down
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Joined: 06 May 2004
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Points: 32 		Post Options Post Options   Thanks (0) Thanks(0)   Quote AliRafiee Quote  Post ReplyReply Direct Link To This Post Topic: CFormView and ScrollBars
    Posted: 06 May 2004 at 4:10pm

Hi,

I have an MDI application, trying to use Office2003 theme.  The application's View is a CXTTabView, and in the OnInitialUpdate I add a couple of views (CFormView) to the CXTTabView.  If I resize the view so that the scrollbars show up, they flicker between gray and blue scrollbars, once I stop it displays the gray ones until I click on each part of the scroll bars, and at that point it redraws them in blue.

What am I doing wrong here?

Thanks

Ali
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LarryWaugh View Drop Down
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Joined: 25 May 2004
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Points: 9 		Post Options Post Options   Thanks (0) Thanks(0)   Quote LarryWaugh Quote  Post ReplyReply Direct Link To This Post Posted: 18 November 2004 at 3:52pm
This is a very ANNOYING problem. Does CodeJock have any input on this situation??
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Oleg View Drop Down
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Joined: 21 May 2003
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Points: 11234 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Oleg Quote  Post ReplyReply Direct Link To This Post Posted: 18 November 2004 at 11:32pm

it is OS xp bug. Remove scrollbars:

void CSimpleForm::OnInitialUpdate()
{
 CFormView::OnInitialUpdate();
 
 SetScaleToFitSize(CSize(0));
 
}
Oleg, Support Team
CODEJOCK SOFTWARE SOLUTIONS
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LarryWaugh View Drop Down
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Joined: 25 May 2004
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Points: 9 		Post Options Post Options   Thanks (0) Thanks(0)   Quote LarryWaugh Quote  Post ReplyReply Direct Link To This Post Posted: 19 November 2004 at 8:26am

Adding SetScaleToFitSize(CSize(0)); causes a Debug Assertion Failed in wingdi.cpp at line 454.

This is a CXTResizeFormView derived class in a CXTSplitterWnd.
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AliRafiee View Drop Down
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Joined: 06 May 2004
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Points: 32 		Post Options Post Options   Thanks (0) Thanks(0)   Quote AliRafiee Quote  Post ReplyReply Direct Link To This Post Posted: 19 November 2004 at 10:05am

Larry

Change the line to

SetScaleToFitSize(CSize(1,1));

to get rid of the asserts, but doesn't solve the problem, it looks like a microsoft bug!

 

Oleg,

For me that doesn't solve the problem, it just simply hids the scrollbar.

 
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robin_l View Drop Down
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Points: 117 		Post Options Post Options   Thanks (1) Thanks(1)   Quote robin_l Quote  Post ReplyReply Direct Link To This Post Posted: 05 May 2007 at 9:44am
I've struggled with this for a long time and have come up with a solution that others might find useful. It seems that if you set the WS_VSCROLL and WS_HSCROLL styles then this ensures the themed scrollbars are used. However, you need to then ensure that these flags are restored to the original values (or resizing doesn't work properly).  In your OnInitialUpdate code add the following before you do anything else:
 
BOOL bisV = (GetStyle() & WS_VSCROLL)!= 0;
BOOL bisH = (GetStyle() & WS_HSCROLL)!= 0;
// add scroll bars to ensure that themed ones are used later
// overcomes windows bug (XP)
ModifyStyle( 0, WS_HSCROLL | WS_VSCROLL );

// remove / put them back correctly
ModifyStyle( WS_HSCROLL | WS_VSCROLL, (bisH ? WS_HSCROLL : 0) | (bisV ? WS_VSCROLL : 0) );
 
ModifyStyle(0, WS_CLIPCHILDREN|WS_CLIPSIBLINGS);
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countersa08 View Drop Down
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Joined: 23 June 2007
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Points: 1 		Post Options Post Options   Thanks (0) Thanks(0)   Quote countersa08 Quote  Post ReplyReply Direct Link To This Post Posted: 23 June 2007 at 11:12pm
Thank you for this solution.  It fixed my problem too!
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tomay3000 View Drop Down
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Points: 56 		Post Options Post Options   Thanks (0) Thanks(0)   Quote tomay3000 Quote  Post ReplyReply Direct Link To This Post Posted: 31 October 2013 at 9:58pm
nice trick ;)

this also could work:

DWORD dwStyle = ::GetWindowLong(m_hWnd, GWL_STYLE);
::SetWindowLong(m_hWnd, GWL_STYLE, WS_HSCROLL | WS_VSCROLL);
::SetWindowLong(m_hWnd, GWL_STYLE, dwStyle);
Product: Codejock ToolkitPro MFC v16.2.0
Platform: Microsoft Windows 8 Pro (64-bit)

Language: Microsoft Visual C++ v6.0 (MFC)
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