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An E Notation Numeric Edit Control

Posted by Mike Scanlon on September 6th, 1998

NumEdit is a simple edit control that forces the user to enter a double value in e notation, such as 1.23, 12e4, -12E4, and so forth. The member functions GetValue() and SetValue() make working with doubles in the edit field a bit easier.

Just declare a variable as type CNumEdit, and off you go.

Download demo project - 28 KB

Download source - 2 KB

About the Author

Mike Scanlon

Visit http://mike.pricklysoft.com.

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Comments

  • Thanks

    Posted by lukecodeguru on 02/22/2006 12:26am

    I appreciate that code. Thanks to you!

    Reply

  • Thanks

    Posted by sangamesha on 10/28/2004 08:22am

    I found it is helpfull.

    Reply

  • ExEditors Library

    Posted by Legacy on 03/19/2002 12:00am

    Originally posted by: Mike Philips 

    A complete collection of editors in a single file:


    http://www.exontrol.com/sg.jsp?content=products/exeditors


    Regards, 

    Mike

    Reply

  • NumEdit: for VC++ newbies

    Posted by Legacy on 08/08/2000 12:00am

    Originally posted by: Eric Hurtebis

    Many thanks for NumEdit: that's all what I was looking for...

    Just to tell about how I used it in my project:

    Copy the 2 files NumEdit.cpp and NumEdit.h in your project directory. Include them in your project (Project, Add).
    (the class CNumEdit will appear in ClassView).

    Add a Edit control in your dialog ressource.
    Add a member variable, CEdit type (e.g. m_x).

    In ClassView, class C...Dlg, double-click on m_x to modify C...Dlg.h:
    change CEdit m_x into CNumEdit m_x.
    also #include NumEdit.h

    In OnInitDialog, you can initialize m_x:
    m_x.SetValue(3.1415).

    Possible enhancements:
    the format string "%G" can be a private member; and can be user-tunable, e.g. "%8.3f", usable for SetValue or UpdateValue (for display, as soon as killfocus).

    Thanks,
    Eric.

    Reply

  • NumEdit

    Posted by Legacy on 03/07/2000 12:00am

    Originally posted by: Boris

    Found Bugs:
    1. on Paste - lets you make paste
    2. lets insert chars(numeric) before "-"
    :)

    Reply

  • Thanks!

    Posted by Legacy on 12/03/1999 12:00am

    Originally posted by: Carlos Melo

    It's just what I need!
    Thanks a lot.
    Keep up the good work.

    Greetings from Portugal,
    Carlos

    Reply

  • A bug found in CPrinter::PrintText(PRTTYPE *ps,double LineSpacing)

    Posted by Legacy on 04/23/1999 12:00am

    Originally posted by: Joseph Kiernan 

    ----------------------------------

    If you want to use display text in CScrollView::OnDraw(),

    you must change 

    ps->pDC->LPtoDP((LPPOINT)&rc, 2); 

    ==> ps->pDC->LPtoDP((CRect)rc); 


    --------------------------------------


    This may no work as intended.  The cast to a CRect causes 

    the RECT rc to be copied into a temporary object.  This 

    temp object is passed to the LP2DP(), changed, then 

    discarded.	The original rc is not changed!  This has the 

    exact same effect as not calling the LPtoDP at all.  


    The proposed solution (or commenting out the LPtoDP) does 

    seem to work for CScrollView but not for any print 

    previews.  The solution we ended up with (to support both 

    view classes)was


    extern BOOL g_bUsingScrollView;

    if (! g_bUsingScrollView)

       ps->pDC->LPtoDP(&rc);


    // don't forget about LastPos at the end of the function

    Reply

  • res dir added

    Posted by Legacy on 02/02/1999 12:00am

    Originally posted by: Mike Scanlon

    The res dir has been added to the demo project.

    Reply
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