Re: Re: CWindowImpl and dynamically created button

Thanks for the replies: I'm using Remote Spy (this application is on Windows Mobile, actually) and it confirms that clicking on the button does not generate any messages in ANY windows in the application.

I will build out an app that isolates the behavior I'm seeing on the desktop platform and post a link to that once I'm done (or if it doesn't have the same problem!).

--- On Wed, 10/21/09, domehead100 <[email protected]> wrote:

> From: domehead100 <[email protected]>
> Subject: [wtl] Re: CWindowImpl and dynamically created button
> To: [email protected]
> Date: Wednesday, October 21, 2009, 9:20 AM
> As Jim, said, a small code sample or
> sample project would be helpful.
> 
> With the freezes, it sounds like something is definitely
> not right :o).
> 
> How do you know the button is not sending messages? 
> Are you using Spy++? If that doesn't work for you, there are
> some fairly easy ways to hook SendMessage calls and log them
> in your debug build, for example, using the Detours library
> from Microsoft.
> 
> --- In [email protected],
> Root Null <imperialgeniusx@...> wrote:
> >
> > Mike,
> >   thanks for the response: I am
> creating (4) inside of (2), but setting (3) to be its
> parent. I'm looking for just regular run of the mill button
> behavior: when I click on the button it should switch
> colors/behave like a button/generate WM_COMMAND messages to
> someone (ANYONE will do), but none of those happen at all.
> > 
> > To further complicate things, I've been getting these
> periodic application freezes: the app simply stops
> responding to clicks or scrolls or menu requests. About 1
> out of every 3 times, it recovers after 10 to 20 seconds.
> Other times I have to force kill the debugging session. I'm
> assuming both of these are somehow related and there's
> something foolish I'm doing, but I'm at a bit of a loss. I'm
> largely a Java person or old style Win32, and this WTL thing
> is new for me.
> > 
> > Imp.
> > 
> > --- On Tue, 10/20/09, domehead100
> <domehead100@...> wrote:
> > 
> > > From: domehead100 <domehead100@...>
> > > Subject: [wtl] Re: CWindowImpl and dynamically
> created button
> > > To: [email protected]
> > > Date: Tuesday, October 20, 2009, 11:57 AM
> > > Are you creating (4) inside of (2),
> > > even though (4) is a child of (3)?
> > > wnd.Create(_display->m_hWnd, rc, _T("TEST"),
> > > WS_CHILD|WS_VISIBLE,0,ID_TEST_ACTION);
> > > 
> > > (noting _display->m_hWnd)
> > > 
> > > Anyway, the button will send messages to it's
> parent. 
> > > The parent is apparently _display.  Are you
> looking for
> > > the messages in _display's message map?  If
> you're
> > > looking for them in (2)'s message map, they won't
> be sent to
> > > (2) but rather to (3)(_display) since that it the
> button's
> > > parent.
> > > 
> > > ~Mike
> > > 
> > > 
> > > 
> > > 
> > > --- In [email protected],
> > > "imperialgeniusx" <imperialgeniusx@>
> wrote:
> > > >
> > > > Hi all,
> > > >   I'm new to WTL and
> implementing
> > > custom controls and have been having some
> difficulty with
> > > what SHOULD be a pretty straightforward thing:
> adding a
> > > button to a CWindowImpl and then having the
> button respond
> > > to clicks and generate events. For some reason,
> this simply
> > > doesn't happen.
> > > > 
> > > >  The basic hierarchy I have is
> > > > 
> > > > CFrameWindowImpl
> > > >   CWindowImpl (1)
> > > >     CWindowImpl (2)
> > > >       CButton (4)
> > > >     CButton (3)
> > > > 
> > > > The numbers reflect the order things are
> created:
> > > everything is dynamically created, and (2) and
> (3) are
> > > created at the same time as children of (1), and
> (4) is
> > > created on demand later on as a child of (2).
> > > > 
> > > > When I display (1) and click on (3), I get
> WM_COMMAND
> > > messages. When I click on (2) anywhere other than
> the
> > > drawing area of (4), I get WM_LBUTTONDOWN and
> WM_LBUTTONUP
> > > messages. (4) is correctly drawn: I get WM_PAINT
> messages
> > > and the button appears in the CWindowImpl area
> correctly.
> > > However when I click on (4) I get nothing: no
> > > WM_LBUTTONDOWN, WM_LBUTTONUP or anything of that
> ilk.
> > > > 
> > > > (2) is created using the following code:
> > > > 
> > > > CVerticalLayout * _display = new
> > > CVerticalLayout(m_hWnd, IDC_DETAILS_LAYOUT);
> > > > 
> > > >  where CVerticalLayout is based on
> CWindowImpl.
> > > The constructor for CVerticalLayout does this:
> > > > 
> > > > this->Create(parent, NULL,
> L"VerticalLayout",
> > > WS_CHILD|WS_VISIBLE|WS_TABSTOP,0,uID);
> > > > 
> > > > and uses the following declarations/message
> map
> > > > 
> > > >
> DECLARE_WND_SUPERCLASS(_T("VerticalLayout"),
> > > GetWndClassName())
> > > > BEGIN_MSG_MAP(CVerticalLayout)
> > > > 
>    MESSAGE_HANDLER(WM_CREATE,
> > > OnCreate)
> > > > 
>    MESSAGE_HANDLER(WM_VSCROLL,
> > > OnVScroll)
> > > > 
>    MESSAGE_HANDLER(WM_KEYDOWN,
> > > OnKeyDown)
> > > > 
>    MESSAGE_HANDLER(WM_DESTROY,
> > > OnDestroy)
> > > > END_MSG_MAP()
> > > > 
> > > > (3) is created using the following code:
> > > > 
> > > > CButton _action;
> > > > _action.Create(this->m_hWnd,NULL,
> szDownload,
> > >
> WS_CHILD|WS_VISIBLE|BS_PUSHBUTTON,0,ID_DETAILS_ACTION);
> > > > 
> > > > and (4) is created using this:
> > > > 
> > > > RECT rc;
> > > > rc.top = 0; rc.bottom = 30; rc.left = 0;
> rc.right =
> > > 150;
> > > > CButton wnd;
> > > > wnd.Create(_display->m_hWnd, rc,
> _T("TEST"),
> > > WS_CHILD|WS_VISIBLE,0,ID_TEST_ACTION);
> > > > 
> > > >   Is this something that
> anyone else
> > > has seen before, or is there a magic setting
> somewhere I
> > > need to deploy to make this do the right thing? I
> thought
> > > that if (3) works then (4) should just work, but
> this
> > > doesn't seem to be the case. I don't even get the
> default
> > > button action when clicked. I get absolutely
> nothing. I've
> > > looked at this using Spy and it confirms that no
> messages
> > > are being sent to any of the windows in the
> application when
> > > I hover over the button's paint area and click,
> but messages
> > > are sent when I click anywhere else on the
> application.
> > > > 
> > > >   Thanks,
> > > >   Imp.
> > > >
> > > 
> > > 
> > > 
> > > 
> > > ------------------------------------
> > > 
> > > Yahoo! Groups Links
> > > 
> > > 
> > >     mailto:[email protected]
> > > 
> > > 
> > >
> >
> 
> 
> 
> 
> ------------------------------------
> 
> Yahoo! Groups Links
> 
> 
>     mailto:[email protected]
> 
> 
> 


      


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