CODEWITHSUNDEEP
visual-c++mfcscroll
Shane Haw
Shane Haw

Reputation: 723

CScrollView Offset Client Rect with Scroll Position

I am trying to write a function that will work out if the window that currently has focus is entirely shown in the client rect of my CScrollView but I am struggling to work out what I am doing wrong. This is what I have thus far:

CWnd * pWnd = pView->GetFocus();
if(pWnd)
{                               
    CRect winRect;
    pWnd->GetWindowRect(&winRect);
    pView->ScreenToClient(&winRect);    //pView is a pointer the CScrollView        

    CRect viewRect;
    pView->GetClientRect(&viewRect);

    CPoint currentScrollPoint = pView->GetScrollPosition();
    viewRect.OffsetRect(currentScrollPoint);

    if(!(viewRect.PtInRect(winRect.BottomRight()) && viewRect.PtInRect(winRect.TopLeft())))
    {
        //Not shown fully
    }
}

Can anyone see what I am doing wrong here or suggest a better way of doing this?

Upvotes: 2

Views: 1617

Answers (1)

Edward Clements
Edward Clements

Reputation: 5132

The comments to the question above cleared up the actual intent of the question:

...when I tab to one that is not shown by the current client rect I want to scroll
to display that `CEdit`...

I found two articles searching MSDN for CFormView scroll tab key:

  • the first one uses OnCtlColor() to check if a sub-window has the focus and is not in view; it uses ScrollToPosition()
  • the second one mentions that ScrollToPosition() does not work in Windows CE (both the articles are quite old!), checks for WM_KEYUP of the tab key in PreTranslateMessage() and uses it's own ScrollToPos() function to scroll the control into view (this article was meant for Windows CE and you will need to replace wce_GetNextWindow by GetNextWindow

Upvotes: 2

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