emacs/oldXMenu/AddSel.c

/* Copyright    Massachusetts Institute of Technology    1985	*/

/*

Copyright 1985, 1986, 1987 by the Massachusetts Institute of Technology

Permission to use, copy, modify, and distribute this
software and its documentation for any purpose and without
fee is hereby granted, provided that the above copyright
notice appear in all copies and that both that copyright
notice and this permission notice appear in supporting
documentation, and that the name of M.I.T. not be used in
advertising or publicity pertaining to distribution of the
software without specific, written prior permission.
M.I.T. makes no representations about the suitability of
this software for any purpose.  It is provided "as is"
without express or implied warranty.

*/




/*
 * XMenu:	MIT Project Athena, X Window system menu package
 *
 * 	XMenuAddSelection - Adds a selection to an XMenu object.
 *
 *	Author:		Tony Della Fera, DEC
 *			August, 1985
 *
 */

#include <string.h>
#include "XMenuInt.h"

int
XMenuAddSelection(Display *display, register XMenu *menu, register int p_num, char *data, char *label, int active, char const *help)

                         	/* Menu object to be modified. */
                       		/* Pane number to be modified. */
               			/* Data value. */
                		/* Selection label. */
               			/* Make selection active? */
               			/* Help string */
{
    register XMPane *pane;	/* Pane containing the new selection. */
    register XMSelect *sel;	/* Newly created selection. */


    int label_length;		/* Label length in characters. */
    int label_width;		/* Label width in pixels. */

    /*
     * Check for NULL pointers!
     */
    if (label == NULL) {
	_XMErrorCode = XME_ARG_BOUNDS;
	return(XM_FAILURE);
    }
    /*
     * Find the right pane.
     */
    pane = _XMGetPanePtr(menu, p_num);
    if (pane == NULL) return(XM_FAILURE);

    /*
     * Calloc the XMSelect structure.
     */
    sel = (XMSelect *)calloc(1, sizeof(XMSelect));
    if (sel == NULL) {
	_XMErrorCode = XME_CALLOC;
	return(XM_FAILURE);
    }
    /*
     * Determine label size.
     */
    label_length = strlen(label);
    label_width = XTextWidth(menu->s_fnt_info, label, label_length);

    /*
     * Fill the XMSelect structure.
     */
    if (!strcmp (label, "--") || !strcmp (label, "---"))
      {
	sel->type = SEPARATOR;
	sel->active = 0;
      }
    else
      {
	sel->type = SELECTION;
	sel->active = active;
      }

    sel->serial = -1;
    sel->label = label;
    sel->label_width = label_width;
    sel->label_length = label_length;
    sel->data = data;
    sel->parent_p = pane;
    sel->help_string = help;

    /*
     * Insert the selection at the end of the selection list.
     */
    emacs_insque(sel, pane->s_list->prev);

    /*
     * Update the selection count.
     */
    pane->s_count++;

    /*
     * Schedule a recompute.
     */
    menu->recompute = 1;

    /*
     * Return the selection number just added.
     */
    _XMErrorCode = XME_NO_ERROR;
    return((pane->s_count - 1));
}