Calling OnDraw() to redraw window 2

[edmund1978]

I need to update my main document view window (in MFC program) using my code in OnDraw in myView class. This needs to be done when a button in one of my dialogs is pressed. I have a message handler but don't know how to call OnDraw (what to put as parameter). I've seen InvalidateRectacngle(..,..) mentioned, but couldn't make this work properly.

 

[GEAK]

If you have a pointer to the doc, you can do this:

   pDoc->UpdateAllViews(NULL);

If you have a pointer to the view you can do this:

   pView->Invalidate();

If you have neither, you can get a pointer to the view (in a SDI app):

   CFrameWnd* pMainWnd = (CFrameWnd*)AfxGetMainWnd();
   CView* pView = pMainWnd->GetActiveView();

or if you're working in a MDI app:

   CMDIFrameWnd* pMainWnd = (CMDIFrameWnd*)AfxGetMainWnd();
   CFrameWnd* pChild = pMainWnd->MDIGetActive();
   CView* pView = pChild->GetActiveView();

CWnd::Invalidate() will erase the background and redraw the entire client area of a view. Invalidate(FALSE) will only redraw (background will not be erased).

 

[edmund1978]

Thanks