# include <stdio.h>
# include <stdlib.h>

# include <X11/Intrinsic.h>
# include <X11/StringDefs.h>
# include <X11/Xaw/Box.h>
# include <X11/Xaw/Label.h>
# include <X11/Xm/PushB.h>

int main ( int argc, char *argv[] );
void Farewell ( Widget widget, XtPointer clientData, XtPointer callData );

/*******************************************************************************/

int main ( int argc, char *argv[] )

/*******************************************************************************/
/*
  Purpose:

    MAIN is the main program for GOODBYE.

  Discussion:

    GOODBYE puts up an X window with a labeled button. 

  Compilation:

    gcc goodbye.c -lXaw -lXm -lXt

  Reference:

    Paul Asente and Ralph Swick,
    X Window System Toolkit,
    Digital Press, 1990

  Modified:

    01 October 2002
*/
{
  XtAppContext app;
  Widget box;
  Widget button;
  Arg buttonArgs[] = 
  {
    {XtNx, 10},
    {XtNy, 40},
    {XtNlabel, "Click and die!"} 
  };
  Widget label;
  Arg labelArgs[] = 
  {
    { XtNx, 10},
    { XtNy, 10},
    {XtNlabel, "Goodbye, world!"}
  };
  Widget toplevel;
/*
  Create a top level shell widget;
*/
  toplevel = XtAppInitialize ( &app, "Goodbye", (XrmOptionDescList) NULL,
    0, &argc, argv, (String *) NULL, (ArgList) NULL, 0 );
/*
  Create the box widget.
*/
  box = XtCreateManagedWidget ( "box", boxWidgetClass,
    toplevel, (Arg *) NULL, 0 );
/*
  Create the label widget.
*/
  label = XtCreateManagedWidget ( "label", labelWidgetClass,
    box, labelArgs, XtNumber(labelArgs) );
/*
  Create the button widget.
*/
  button = XtCreateManagedWidget ( "button", xmPushButtonWidgetClass,
    box, buttonArgs, XtNumber(buttonArgs) );
/*
  Associate the callback function.
*/
  XtAddCallback ( button, XtNcallback, Farewell, NULL );
/*
  Realize the widgets.
*/
  XtRealizeWidget ( toplevel );
/*
  Enter the event loop.
*/
  XtAppMainLoop ( app );
}
/*******************************************************************************/

void Farewell ( Widget widget, XtPointer clientData, 
  XtPointer callData )

/*******************************************************************************/
/*
  Purpose:

    FAREWELL is a callback function.

  Modified:

    01 October 2002
 
  Parameters:

    ?put, Widget widget, ?

    ?put, XtPointer clientData, ?

    ?put, XtPointer callData, ?
*/
{
  exit ( 0 );
}