Re[2]: Determine whether window created yet [Was: [lmi] wx segfault iterating on GetChildren()]

[Vadim Zeitlin]

On Wed, 15 Mar 2006 17:23:41 +0000 Greg Chicares <address@hidden> wrote:

GC> On 2006-3-11 15:06 UTC, Vadim Zeitlin wrote:
GC> > On Sat, 11 Mar 2006 14:36:07 +0000 Greg Chicares <address@hidden> wrote:
GC> > 
GC> > GC> It's somewhat distasteful to use IsShown() to determine whether
GC> > GC> a window has been "fully created". After all, a notebook that was
GC> > GC> once shown may be temporarily hidden. But is there any better way?
GC> > 
GC> >  No, not out of the box. But you can assume that the window is fully
GC> > created as soon as you get almost any message for it so it's common to set
GC> > a m_isCreated flag in EVT_WINDOW_CREATE or even EVT_SIZE or EVT_IDLE
GC> > handlers.
GC> 
GC> Okay. I want to add a variable to a wxDialog-derived class:
GC> 
GC>   /// is_fully_created_: True iff dialog construction has completed and
GC>   /// destruction has not yet begun.

 This will work but, again, I think it's a bit sloppy to rely on such
generic flag. Usually you shouldn't need it and if/when you do there are
more often than not better things to test for. In particular in your case I
still think that a dynamic Connect() would be a better solution.

GC> When should I change its value back to false, so that I can use this
GC> flag to prevent a dialog that's in the process of destruction from
GC> trying to do something it shouldn't?
GC>   - a wxWindow::Destroy() virtual override?
GC>   - an EVT_CLOSE handler?
GC>   - my class's destructor?

 Probably the last one but, again, it really depends on what do you
want/need it for exactly and so I'm afraid there is no generic "best"
solution.

 Regards,
VZ