Re: CPropertySheet in a CDialogBar?

From:
"AliR \(VC++ MVP\)" <AliR@online.nospam>
Newsgroups:
microsoft.public.vc.mfc
Date:
Fri, 23 May 2008 13:35:06 -0500
Message-ID:
<O6EZj.244$ZE5.156@nlpi061.nbdc.sbc.com>
The only suggestion is what you are already doing, you have to create the
property sheet programmatically, no way around it.

I have one suggestion, why are you adding a pointer to your CMyPropertySheet
to CMyDlgBar. Why do you need it pointer.
You can simply declare it like this:
class CMyDlgBar
{
private:
    CMyPropretySheet m_MyPropertySheet;
};

This way you don't have to "new" it and most importantly you will never
forget to "delete" it. Don't use pointers where a simple instance variable
would work just fine. You are adding a unnecessary level of complexity to
your code.

AliR.

<emeric.maschino@gmail.com> wrote in message
news:1736d165-90ff-4095-9dbc-34a4090f828b@w7g2000hsa.googlegroups.com...

Hi,

I have a CMyDlgBar CDialogBar-derived object (created by following the
steps in http://support.microsoft.com/kb/185672/en-us). Now I want to
add a CPropertySheet-derived object into it.

If I simply create a CMyPropertySheet class derived from
CPropertySheet and add a m_pMyPropertySheet pointer to this class as a
member variable of CMyDlgBar, the property sheet is displayed
correctly with m_pMyPropertySheet->Create( IDD_PROPERTY_SHEET, this )
in CMyDlgBar::OnInitDialog(...).

Now, rather than programmatically creating the property sheet, I would
like to define it in my dialog bar with the Resource Editor. I've thus
added a IDC_CUSTOM_CTRL Custom Control with the Resource Editor into
my IDD_DIALOGBAR CDlgBar resources and replaced the above Create line
in CMyDlgBar::OnInitDialog(...) with m_pCMyPropertySheet-

SubclassDlgItem( IDC_CUSTOM_CTRL, this ). Doing this leads to a crash

in CMyApp::InitInstance(...) at the line performing the initialization
of the main frame (if ( !pMainFrame || !pMainFrame-

LoadFrame(IDR_MAINFRAME))) generated by the application wizard. The

problem is really in the pMainFrame->LoadFrame(IDR_MAINFRAME)
instruction as the pMainFrame pointer is valid.

This problem is 100% reproduceable and is only due to adding a Custom
Control. You can test it very simply:
- create a MFC MDI application keeping the default settings of the
application wizard
- add a CDialogBar-based object as explained in the URL mentionned at
the beginning of this post
- add a Custom Control in your dialog bar resources with the Resource
Editor
- run the project; it will fail in CYourApp::InitInstance(...).
This is with Visual Studio 2005, I don't know whether this is
important or not. I hope not ;-)

As a workaround, rather than adding a Custom Control in my
IDD_DIALOGBAR CDlgBar resources to define the area I want my property
sheet to be displayed in, I've added a IDC_PICTURE_CTRL Picture
Control. I've then subclassed it as a CMyPropertySheet object in
CMyDialogBar::OnInitDialog(...) with m_pCMyPropertySheet-

SubclassDlgItem( IDC_PICTURE_CTRL, this ). This time, my application

starts up fine, the dialog bar is correctly displayed but the area of
the property sheet is filled in by an empty gray rectangle :-(.

I've noticed that using the "Picture Control/subclass" approach,
CMyPropertySheet::OnInitDialog(...) is never called. By contrast,
using the "no resource/Create" approach goes through
CMyPropertySheet::OnInitDialog(...).

Any suggestion appreciated. Thanks!

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