Using CContainedWindowT in a base class causes assert in conrete class

[Philipp Kursawe]

I have a base template class

template<class T, UINT titleId, int SortIndex, class WindowClass = ATL::CWindowImpl<T>>
class ATL_NO_VTABLE ITabPageImpl : public WindowClass {

BEGIN_MSG_MAP_EX(ITabPageImpl)
MSG_WM_CREATE(onCreate)
MSG_WM_DESTROY(onDestroy)

REFLECT\_NOTIFICATIONS\_EX()

ALT_MSG_MAP(1)
NOTIFY_CODE_HANDLER_EX(LVN_DELETEITEM, onModifyTable)
END_MSG_MAP()

ITabPageImpl() : _table(this, 1) {}

private:
ATL::CContainedWindowTWTL::CListViewCtrl _table;

In the onCreate method I subclass a control, if the implementation provides a specific method:

__if_exists(T::getTableControl) {
_table.SubclassWindow(static_cast<T*>(this)->getTableControl());
}

However, after subclassing the message loop of T produces an assertion when the subclassed control is supposed to process its first message. The basic Idea is, that I want to put handling of certain messages in the base class and lift the burden on implementation classes. Thanks for any help!

Happy coding, Philipp Kursawe

[Alain Rist]

Hi Philipp, You are misunderstanding ATL::CContainedWindow operation. Post on the WTL support list[^] for help. cheers, AR

When the wise (person) points at the moon the fool looks at the finger (Chinese proverb)

[Philipp Kursawe]

Thanks Alain for your reply! Maybe I should describe what I want to achieve: I want to subclass a child window and pre-handle certain messages in my class before the child window can process them itself. I thought CContainedWindow was the way to go then? In the particular case I want to set the background colour of the window.

Happy coding, Philipp Kursawe