/* $XConsortium: helloint.c /main/5 1995/07/15 20:45:32 drk $ */
/*
 * Motif
 *
 * Copyright (c) 1987-2012, The Open Group. All rights reserved.
 *
 * These libraries and programs are free software; you can
 * redistribute them and/or modify them under the terms of the GNU
 * Lesser General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 * These libraries and programs are distributed in the hope that
 * they will be useful, but WITHOUT ANY WARRANTY; without even the
 * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 * PURPOSE. See the GNU Lesser General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with these librararies and programs; if not, write
 * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
 * Floor, Boston, MA 02110-1301 USA
 */
/*
 * HISTORY
 */
#include <stdlib.h>		/* for getenv() */
#include <Xm/Xm.h>              /* Motif Toolkit */
#include <Mrm/MrmPublic.h>      /* Mrm Toolkit */

#define APP_CLASS "XmdHelloInt"

static void Activate(Widget, XtPointer,	XtPointer);

/* 
 * MRM database file list 
 */
static String uid_vec[]={"helloint.uid","l_strings.uid"}; 
/* 
 * Callback bindings
 */
static MrmRegisterArg reg_vec[] = {       
  {"helloworld_button_activate",(XtPointer)Activate}
};

/*
 * MRM Hierachy
 */
static MrmHierarchy s_mrm_hierarchy;		


/****************************************************************
 *
 *  Main program. Fetch UIL interface description and enter 
 *  event loop.
 *
 ****************************************************************/
int main(int argc, 
	 char *argv[])
{
  XtAppContext app_context;
  Widget       top_level, helloworld_main;
  MrmCode      mrm_class;
  char       * applresdir;

  /*
   *  This demo requires XAPPLRESDIR to be set to '.'. Mrm
   *  will only report that l_strings.uid could not be found,
   *  so, to be a little more friendly, we help the user. This
   *  it not a check that normally would be done, since the uid
   *  files would be installed in the appropriate directory.
   */

  if ((applresdir = (char *)getenv("XAPPLRESDIR")) == NULL ||
      strcmp(applresdir, ".") != 0) {
    XtError("Environment variable XAPPLRESDIR must be set to \".\"\n");
  }

  /*
   *  Set up language environment.
   */
  XtSetLanguageProc(NULL, NULL, NULL);
  
  /*
   *  Initialize MRM
   */
  
  MrmInitialize ();
  
  /* 
   * Initialize Xt and create a resizable shell 
   */
  
  top_level = XtVaAppInitialize(&app_context, "XmdHelloInt", 
				NULL, 0, &argc, argv, NULL, 
				XmNallowShellResize, True, NULL); 

  /*
   * Create the Mrm hierarchy
   */
  
  if (MrmOpenHierarchy (XtNumber(uid_vec),	    /* number of files	    */
			uid_vec, 		    /* files     	    */
			NULL,			    /* os_ext_list (null)   */
			&s_mrm_hierarchy)	    /* ptr to returned id   */
      != MrmSUCCESS) {
    XtError ("can't open hierarchy\n");
  }
  
  /*
   * Register our callback routines so that the resource manager can 
   * resolve them at widget-creation time.
   */

  if (MrmRegisterNames (reg_vec, XtNumber(reg_vec)) != MrmSUCCESS) {
    XtError("can't register names\n");
  }

  /*
   *  Call MRM to fetch and create the widgets 
   */
  
  if (MrmFetchWidget (s_mrm_hierarchy, 
		      "helloworld_main", 
		      top_level,
		      &helloworld_main, 
		      &mrm_class) != MrmSUCCESS) {
    XtError ("can't fetch interface\n");
  }
  
  /*
   * Manage the widget returned by Mrm.
   */

  XtManageChild(helloworld_main);

  /*
   * Realize the widget tree.
   */
  XtRealizeWidget(top_level);
   
  /*
   *  Loop and process events
   */
  
  XtAppMainLoop(app_context);

  /* UNREACHABLE */
  return (0);
}


static void Activate(Widget    widget,
		     XtPointer client_data,
		     XtPointer callback_data)
{
  static Boolean first_time = True;
  Arg arglist[1];
  
  if (first_time) {
    /*
     * Get "Goodbye World!" in the language of choice and
     * set the label string of widget to this string.
     */
    XtSetArg(arglist[0], XmNlabelString, "bye_label");
    MrmFetchSetValues(s_mrm_hierarchy, widget, arglist, 1);
    first_time = False;
  } else {
    /*
     * We're done...
     */
    exit(0);
  }
}