OpenEuphoria

Re: popSelf( ) wont fly

• Posted by Al Getz <xaxo at AOL.COM> Sep 13, 2000
• 527 views

Hi Derek,

  Matt suggested using getSelf() to return the id but since its not
  global it cant be used by an external program.

  Returning the id of the control is important for at least these reasons:

  1.  User created message map to handle control functions not handled
      by Win32Lib (what i need now).  This is what the original intent
      of onEvent() was (somewhat).

  2.  Enumerated controls: for messageing a large number of controls
      of the same type, such as a calculator keypad. Makes the processing
      code neat and compact if you can decode which of your controls
      is being serviced.  This is especially true when the controls
      are very much the same (such as an alpha keypad).

  3.  A large number of C functions require the hwnd of the control
      in order to call the function.  Here's just one example:

    hTarget=c_func(xSendMessage,{hwndFrom,TVM_HITTEST,0,lphti})

    This is just one of many possible function calls and even
    the wrapped version still requires the id of the control.
    So how else would one use "sendMessage()" without knowing the id?
    Having the id also allows getting the hwnd if desired.
    Using sendmessage() in either form is an important part of the
    windows API, and thats only one example.  A lot more functions
    require the hwnd of the control, so im surprised no one else
    said anything yet.  Is anyone using it that much?


  The only way around the above that i can see is to add code to winlib
  which then makes it somewhat specialized.  It would be better to
  allow the user to create his own message map if needed.  This allows
  for more flexibility also.  To do this, the id has to be known.

  Since getSelf() achieves all these goals, why not just make it a global?

  --Al