Re: CWindowImpl and dynamically created button

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]
> > 
> > 
> >
>




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