CXTPPropertyGridInPlaceEdit::OnEnKillFocus() BANG!

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   Hello,
Our application uses CodeJock to implement user-interface properties.

In debug mode only, after entering a property and pressing ENTER, we get a crash:

Unhandled exception at 0x7c28fdea (mfc71d.dll) in <our app name>.exe
0xC0000005: Access violation reading location 0x00000306.

The debugger stops at mfc\cmdtarg.cpp in function _AfxDispatchCmdMsg() around this block:

 case AfxSigCmd_v:
  // normal command or control notification
  ASSERT(CN_COMMAND == 0);        // CN_COMMAND same as BN_CLICKED
  ASSERT(pExtra == NULL);
  (pTarget->*mmf.pfnCmd_v_v)();     // *** STOPS HERE I THINK ***
  break;

Next up the call stack is CXTPPropertyGridInplaceEdit::OnEnKillfocus().

Here's the stack:

mfc71d.dll!CWnd::Invalidate(int bErase=0)  Line 135 + 0xa
CXTPPropertyGridInplaceEdit::OnEnKillfocus()  Line 176 
mfc71d.dll!_AfxDispatchCmdMsg(CCmdTarget * pTarget=0x0884c018, unsigned int nID=0, int nCode=512, void (void)* pfn=0x00f8390d, void * pExtra=0x00000000, unsigned int nSig=53, AFX_CMDHANDLERINFO * pHandlerInfo=0x00000000)  Line 89 C++
mfc71d.dll!CCmdTarget::OnCmdMsg(unsigned int nID=0, int nCode=512, void * pExtra=0x00000000, AFX_CMDHANDLERINFO * pHandlerInfo=0x00000000)  Line 396 + 0x27 C++
mfc71d.dll!CWnd::ReflectChildNotify(unsigned int uMsg=273, unsigned int wParam=33554432, long lParam=1051288, long * pResult=0x00000000)  Line 3233 + 0x21 C++
mfc71d.dll!CWnd::OnChildNotify(unsigned int uMsg=273, unsigned int wParam=33554432, long lParam=1051288, long * pResult=0x00000000)  Line 3205 C++

Can anyone tell me what might be going wrong?

Has anyone seen something like this before?

Thanks for looking,

Pete

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newbarker Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 30 April 2009 Location: United Kingdom Status: Offline Points: 3	Post Options Post Reply Quote newbarker Report Post Thanks(0) Quote Reply Topic: CXTPPropertyGridInPlaceEdit::OnEnKillFocus() BANG! Posted: 30 April 2009 at 6:58am
	Hello, Our application uses CodeJock to implement user-interface properties. In debug mode only, after entering a property and pressing ENTER, we get a crash: Unhandled exception at 0x7c28fdea (mfc71d.dll) in <our app name>.exe 0xC0000005: Access violation reading location 0x00000306. The debugger stops at mfc\cmdtarg.cpp in function _AfxDispatchCmdMsg() around this block: case AfxSigCmd_v: // normal command or control notification ASSERT(CN_COMMAND == 0); // CN_COMMAND same as BN_CLICKED ASSERT(pExtra == NULL); (pTarget->mmf.pfnCmd_v_v)(); // STOPS HERE I THINK * break; Next up the call stack is CXTPPropertyGridInplaceEdit::OnEnKillfocus(). Here's the stack: mfc71d.dll!CWnd::Invalidate(int bErase=0) Line 135 + 0xa CXTPPropertyGridInplaceEdit::OnEnKillfocus() Line 176 mfc71d.dll!_AfxDispatchCmdMsg(CCmdTarget * pTarget=0x0884c018, unsigned int nID=0, int nCode=512, void (void)* pfn=0x00f8390d, void * pExtra=0x00000000, unsigned int nSig=53, AFX_CMDHANDLERINFO * pHandlerInfo=0x00000000) Line 89 C++ mfc71d.dll!CCmdTarget::OnCmdMsg(unsigned int nID=0, int nCode=512, void * pExtra=0x00000000, AFX_CMDHANDLERINFO * pHandlerInfo=0x00000000) Line 396 + 0x27 C++ mfc71d.dll!CWnd::ReflectChildNotify(unsigned int uMsg=273, unsigned int wParam=33554432, long lParam=1051288, long * pResult=0x00000000) Line 3233 + 0x21 C++ mfc71d.dll!CWnd::OnChildNotify(unsigned int uMsg=273, unsigned int wParam=33554432, long lParam=1051288, long * pResult=0x00000000) Line 3205 C++ Can anyone tell me what might be going wrong? Has anyone seen something like this before? Thanks for looking, Pete

newbarker Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 30 April 2009 Location: United Kingdom Status: Offline Points: 3	Post Options Post Reply Quote newbarker Report Post Thanks(0) Quote Reply Posted: 06 May 2009 at 5:34am
	Moderator: This topic is still pending approval. Can you approve it please? Here's the place in the CodeJock code where CWnd::Invalidate() is called: void CXTPPropertyGridInplaceEdit::OnEnKillfocus() { if (!m_pGrid) return; if (m_pItem) { m_pItem->OnValidateEdit(); if (m_pGrid) m_pGrid->Invalidate(FALSE); } #ifdef XTP_SITENOTIFY_ONFOCUS XTP_SITENOTIFY_ONFOCUS(this, m_pGrid, FALSE) #endif }

Oleg Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 21 May 2003 Location: United States Status: Offline Points: 11234	Post Options Post Reply Quote Oleg Report Post Thanks(0) Quote Reply Posted: 07 May 2009 at 12:55am
	Hi, Can you compile our sample and check if it works ? What version do you have ?
	Oleg, Support Team CODEJOCK SOFTWARE SOLUTIONS

newbarker Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 30 April 2009 Location: United Kingdom Status: Offline Points: 3	Post Options Post Reply Quote newbarker Report Post Thanks(0) Quote Reply Posted: 07 May 2009 at 4:35am
	Appreciate your reply. I've compiled these samples: PropertyGrid\BindSample PropertyGrid\DrawClient PropertyGrid\GridSample PropertyGrid\OwnerDraw and couldn't get any of them to crash. We're using version 9.60.1. I understand this might be a bit old but we're only using the property grid part of codejock. The property grid is one of the main UI parts to our application, and the application is pretty large so I wanted to try to avoid upgrading at this time because I'm fairly sure an upgrade would take us time to subsume and stabilise. I need to try and fix this fairly quickly. Our application makes a lot of use of BCG and docking windows. The property grid sits inside a BCG docking window. I notice the samples are dialog-based and wonder if that might make a difference. Any ideas you have would be well received. Thanks, Pete