Re: Controls won't get resized in deep window hierarchies

--- In [email protected], Catalin Rotaru <catalin.rotaru@...> wrote:
>
> We have an application with a complex hierarchy of Splitters, Pannels
> and Resizable dialog-views. Recently we noticed that on 64-bit Vista
> resizing the main frame would fail to resize the inner-most windows or
> controls.
> 
> A bit of research got me to this:
> 
> http://blogs.msdn.com/alejacma/archive/2008/11/20/controls-won-t-get-resized-once-the-nesting-hierarchy-of-windows-exceeds-a-certain-depth-x64.aspx
> 
> Turns out that recursive calls WM_SIZE must not exceed a certain depth
> which on x64 is not very large.
> 
> It's a known bug. An awful one. Yet another reason to make me want to
> switch to a HWND-free framework, and to never have to deal with the
> problems and limitations Microsoft has in Windows' controls.
> 
> Anyway, the question is now: what to do? Anybody had encountered this
> problem before? Suggestions of a workaround? I can't exactly change my
> hierarchy thus I need a way to deliver the WM_SIZE messages
> non-recursively. But they are triggered by main frame resizes and the
> recursive calls are in CDialogResize, Splitter and Panel. So I am at a
> loss.
> 
> Any suggestions are GREATLY appreciated.
> 
> Thanks,
> Cata
>

I might suggest taking a look at a signals/slots library such as sigslot:

http://sigslot.sourceforge.net/

I've begun using this library more and more in the past weeks/months and have found it simple to use and quite powerful.  It's more limited than some other signal/slot implementations, but it is also exceptionally simple to use and understand.  Using signals/slots, perhaps you could wire up a signal to replace WM_SIZE and add OnSize slots to your various classes to react to the size signal.

I have no idea if/how sigslot works on x64.  I did have to change line 419 in sigslot.h from:

typedef sender_set::const_iterator const_iterator;

to

typedef typename sender_set::const_iterator const_iterator;

to get it to compile on newer versions of Visual Studio.

Best of luck,

~Mike




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