Re: CArchiveException : badClass - C / C++ / MFC Discussion Boards

Beginner question: Limit number of MDI pages open at one time...

John Soares1-Jul-02 6:42

1-Jul-02 6:42

I have an MDI application. What I need to do is limit the number of MDI windows open at one time to two(2).

How can I do this easily? I thought of using OnFileOpen() and then counting the number of times it went to this function was called, but I can still open multiple windows. Then I thought of going into the resources. I saw they had about 28 files that could be opened, so I limited that to two. That didn't work either.

I have no other code to show you, but any hints would be appreciated.

Best,

John Soares
support@onlinescamreports.com

Re: Beginner question: Limit number of MDI pages open at one time...

Chad Koehler1-Jul-02 6:50

Chad Koehler

1-Jul-02 6:50

Do you have multiple document templates? Or multiple views off of the same document... Either way what you are asking is possible. Just two different ways to do it.

Exporting template based class from a Dll

PinkPanter1-Jul-02 6:17

PinkPanter

1-Jul-02 6:17

How can we build a Dll with template-based-class export capability?
Can we export classes like this:

#ifdef INSIDE_DLL_PROJECT
#define DLL_OBJ __declspec(dllexport)
#else
#define DLL_OBJ __declspec(dllimport)
#endif

template<class T>
class DLL_OBJ SimpleTemplateClass
{
//declarations and class interface
};

I want to hide my implementation template classes and build a Dll (as we do for non-template export Dll) instead of distributing all class codes in an .h unit.
Does the same problem prevent MS to build WTL Dlls?
I use MS Visual C++ 6.

Re: Exporting template based class from a Dll

Mike Nordell2-Jul-02 7:17

Mike Nordell

2-Jul-02 7:17

Since your < and > signs disappeared I can't really say. But you can _not_ ship anything where you are not exporting the explicit instantiations of a template class without shipping the code itself.

It's three steps:
1 - Class template (the code).
2 - Template class (the code instantiation of that template class).
3 - Exporting 2.

CArchiveRxception : badClass

Olivier REIX1-Jul-02 6:07

Olivier REIX

1-Jul-02 6:07

Hi,

(FYI : Moving my project from VC6 to VC7, I have an horrible amount of problems.)
The last one is I can not read my old files. The same code compiled with VC6 is OK. Now if I compile with VC7, I have a CArchiveException::badClass.

The output window of the debugger write :
"Warning: Cannot load DCStoreContents from archive. Class not defined.
CArchive exception: badClass."

Any idea ?

Re: CArchiveException : badClass

Olivier REIX2-Jul-02 21:32

Olivier REIX

2-Jul-02 21:32

The answer was found on Microsoft forum : this is a bug of VC7 (modification of the IMPLEMENT_SERIAL macro) and we just have to wait for the service release.

Re: CArchiveException : badClass

zebbedi15-Dec-03 10:47

zebbedi

15-Dec-03 10:47

I have just got this same error under visual studio 2003 when trying to serialize a CMapStringToOb class from disk back into the hash table from inside a MFC DLL. The strange thing is im also serializing about another 6 CArray objects which work with no problem what so ever.

From what i can gather this bug was found in 2002 .NET and has still not been fixed??

Did you ever get your code working?

Thanks

zebbedi

Re: CArchiveException : badClass

Olivier REIX15-Dec-03 20:20

Olivier REIX

15-Dec-03 20:20

Wow, this was one year ago !

As I wrote, there was a bug in the IMPLEMENT_SERIAL macro in the VS.NET 2002, which was signaled in Microsoft Forum.

In June this year, I tried again to move our VC6 project to the (then) new VS.net 2003 and this time I think it worked correctly from the beginning (I do not remember having any of this problem - but I did have others).

So I don't think I have had the problem with VS 2003, and I can not see how to help, sorry.

Best regards,
Olivier

Re: CArchiveException : badClass

zebbedi15-Dec-03 20:44

zebbedi

15-Dec-03 20:44

Thanks for the reply,

Just out of interest were you using a collection class of some type (CArray, CMap etc). If so please could you tell me which.

My DLL currently has another 6 CArray collections in it which serialize no problem. Its only this CMapStringToOb that is giving me grief.

Soon as i take the exact same code outside the DLL it works perfectly.

Probelm regarding cpp

SamirSood1-Jul-02 4:44

SamirSood

1-Jul-02 4:44

I have a probelm that one of my cpp files is converted into the Hex code automatically . The exe is working fine but i am not able to trace the code back.
Can you suggest some Solution

Samir Sood

Re: Probelm regarding cpp

[James Pullicino]1-Jul-02 5:06

[James Pullicino]

1-Jul-02 5:06

Are you compiling in debug mode?

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CEdit Control Co-Ordinates

Chavez1-Jul-02 4:18

Chavez

1-Jul-02 4:18

Hi, I would like to get hold of the co-ordinates of an Edit control on a dialog.

I've tried creating a control var for that Edit box and using of it's functions but am having no joy.

I would appreciate any help you could give me.

Jacques Victor

Re: CEdit Control Co-Ordinates

dazinith1-Jul-02 4:41

dazinith

1-Jul-02 4:41

CEdit* pEdit = (CEdit*)GetDlgItem(IDC_MYEDIT);
CRect EditRect;
pEdit->GetWindowRect(EditRect); // puts coordinates into CRect
ScreenToClient(EditRect); // converts from screen coordinates to relative to the dialog its in

EditRect.top -= 50; // subtract 50 from the top pos
// set the position to the new position
pEdit->SetWindowPos(&wndTop, EditRect.left, EditRect.top, 0, 0, SWP_NOZORDER | SWP_NOSIZE);

// hope that helps

-dz

Need a DialogBar HOWTO

bisserke1-Jul-02 3:56

bisserke

1-Jul-02 3:56

I'm looking for a decent DialogBar HOWTO.
Need a kind of tool window like those neat panels from macromedia.
I know it can be done with a CDialogBar and with dockable disabled.

It aint so hard to for a single dialog, but i want to use tabs. I cant get it done, so ...

Anybody got an idea how to get the job done, where to find a decent HOWTO ?

ps. i'm quite new to MFC thus... keep answers not too technical Confused | :confused:

thx all

I used to have a life ... now I have a computer

Re: Need a DialogBar HOWTO

[James Pullicino]1-Jul-02 4:00

[James Pullicino]

1-Jul-02 4:00

Can't you insert a tabctrl in your dlg resource?

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Re: Need a DialogBar HOWTO

bisserke1-Jul-02 4:07

bisserke

1-Jul-02 4:07

sure i can. I aint that dumb.

But i got problems creating child windows.
And catching their messages.

I used to have a life ... now I have a computer

Re: Need a DialogBar HOWTO

[James Pullicino]1-Jul-02 5:15

[James Pullicino]

1-Jul-02 5:15

I don't know about child windows, but catching there messages might involve overrriding the following function: CControlBar::WindowProc()

Check the source code for it and you will see something like this:

<br />
LRESULT CControlBar::WindowProc(UINT nMsg, WPARAM wParam, LPARAM lParam)<br />
{<br />
    ASSERT_VALID(this);<br />
<br />
    // Parent notification messages are just passed to parent of control bar.<br />
    switch (nMsg)<br />
    {<br />
    case WM_COMMAND:<br />
    case WM_DRAWITEM:<br />
    case WM_MEASUREITEM:<br />
    case WM_DELETEITEM:<br />
    case WM_COMPAREITEM:<br />
    case WM_VKEYTOITEM:<br />
    case WM_CHARTOITEM:<br />
        return ::SendMessage(::GetParent(m_hWnd), nMsg, wParam, lParam);<br />
    }<br />
    return CWnd::WindowProc(nMsg, wParam, lParam);<br />
}<br />

Add the desired messages you wish to capture after
case WM_CHARTOITEM:

For more info, search for the following article in the MSDN:

Using CDialogBar in 32-Bit MDI Applications
Nigel Thompson
Microsoft Developer Network Technology Group
Created: September 27, 1994

James

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How do you remove or hide the Menu in an MDI window (CMDIFrameWnd)?

1-Jul-02 3:32

How do you remove (without resulting to error) or hide the Menu in an MDI window (CMDIFrameWnd)?

Re: How do you remove or hide the Menu in an MDI window (CMDIFrameWnd)?

[James Pullicino]1-Jul-02 4:06

[James Pullicino]

1-Jul-02 4:06

Have you tried deleting each menu item one by one?

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Re: How do you remove or hide the Menu in an MDI window (CMDIFrameWnd)?

1-Jul-02 5:46

No I haven't tried that, but will try.

Got a solution though: I am currently trying to set the Menu of the Main Frame Window menu to NULL:

////
BOOL CMainFrame::OnEraseBkgnd(CDC* pDC)
{
// TODO: Add your message handler code here and/or call default

if (GetMenu ())
SetMenu (NULL);

return CMDIFrameWnd::OnEraseBkgnd(pDC);
}
////

It works.. except sometimes there are some minor flicker when adding or closing child windows.

Other ideas are much appreciated Smile | :)

Thanks.

dialog from property sheet? (newbie)

1-Jul-02 3:09

I have a property sheet, which I added a button.
The button brings up a modeless dialog, using the Visual C++'s sample modeless code. The dialog is never visually created, but successfully returns from the Create call (i.e., 1).

m_pCrowsFeet_modeless = NULL;
if (m_pCrowsFeet_modeless == NULL){
m_pCrowsFeet_modeless = new CrowsFeet_Dlg(this);
BOOL dana1 = m_pCrowsFeet_modeless->Create();
if (dana1 == TRUE)
GetDlgItem(IDOK)->EnableWindow(FALSE);
}
else
m_pCrowsFeet_modeless->SetActiveWindow();

The value of dana1 from the Create is 1. But the error occurs when
EnableWindow(FALSE) is invoked. That is the ASSERT(::IsWindow(m_hWnd) is violated and aborts.

CWnd* CWnd::GetDlgItem(int nID) const
{
ASSERT(::IsWindow(m_hWnd));

if (m_pCtrlCont == NULL)
return CWnd::FromHandle(::GetDlgItem(m_hWnd, nID));
else
return m_pCtrlCont->GetDlgItem(nID);
}

The dialog works when called from an application, but not from a property sheet.

Is not a property derived from Cwnd and therefore an IsWindow?
The this from the dialog code does not appear to have a m_hWnd.
Is this true of a propertysheet?

Although the same parent is used to create a window

BOOL ret = Create(NULL, windowName, WS_OVERLAPPEDWINDOW | WS_VSCROLL,
CRect(10,10,300,400), parent, 0);

Thanks, dana

Re: dialog from property sheet? (newbie)

Prem Kumar1-Jul-02 4:47

Prem Kumar

1-Jul-02 4:47

try removing the 'this' in the line

m_pCrowsFeet_modeless = new CrowsFeet_Dlg(this);

and then see.

Attach to process

Hans Ruck1-Jul-02 2:53

Hans Ruck

1-Jul-02 2:53

I click Build/Start Debug/Attach to process. Normally i must get the processes list as i can choose something from it. But the list is empty.
Do you know how could i bring the PIDs into the list?

rechi

Re: Attach to process

Hans Ruck1-Jul-02 3:14

Hans Ruck

1-Jul-02 3:14

This was related to the one below.
The problem will not appear if you don't have any service blocked.

rechi

ATL service stopping

Hans Ruck1-Jul-02 2:19

Hans Ruck

1-Jul-02 2:19

I've created an ATL service. I've started it and it was ok, but the stop action blocked and now the service is in stopping state.
How should i stop the service without reboot?

rechi

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.