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QuestionHow can I get access to CXXView variables from a Parent Class in MFC Pin
Member 1503370419-Jan-21 8:34
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AnswerRe: How can I get access to CXXView variables from a Parent Class in MFC Pin
Victor Nijegorodov19-Jan-21 21:52
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GeneralRe: How can I get access to CXXView variables from a Parent Class in MFC Pin
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GeneralRe: How can I get access to CXXView variables from a Parent Class in MFC Pin
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GeneralRe: How can I get access to CXXView variables from a Parent Class in MFC Pin
Member 1503370421-Jan-21 6:58
MemberMember 1503370421-Jan-21 6:58 
Dear Victor Nijegorodov

Before of all, many thanks for your advice.

The structure of solution is as follows:
Calculations are to be done in CLASS A;
and class CXXView : public CView, public CALSS A
CXXView dose not know when these Calculations are done;
When CLASS A send a message to CXXView, then CXXView execute other methods;
The message is InvalidateRect;

The problem is that CXXView dose not know when these Calculations are done.
On the ther hand, I don't want to define a flag and check it continuously if Calculations are done or not?

so CXXView has to await receiving InvalidateRect message from CLASS A

I tried to define an instance of CXXView class within the CLASS A:

CXXView* pCurrentView;
CRect rect = pCurrentView->m_Rect_zone;
HWND pWnd = pCurrentView->GetSafeHwnd();
InvalidateRect(NULL, NULL, FALSE);

but I was not succeeded because of this compiler error:
Uninitialized variable pCurrentView

One macro or something like that is missing here (CXXView* pCurrentView;) which I am not familiar with that.

Best Regards
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