/* 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
 *
 * 	XMenuDeletePane - Deletes a pane from an XMenu object.
 *
 *	Author:		Tony Della Fera, DEC
 *			20-Nov-85
 *
 */

#include "XMenuInt.h"

int
XMenuDeletePane(register Display *display, register XMenu *menu, register int p_num)
                              	/* Previously opened display */
                         	/* Menu object to be modified. */
                       		/* Pane number to be deleted. */
{
    register XMPane *p_ptr;	/* Pointer to pane being deleted. */
    register XMSelect *s_ptr;	/* Pointer to selections being deleted. */
    register XMSelect *s_next;  /* Pointer to next selection to be deleted. */

    /*
     * Find the right pane.
     */
    p_ptr = _XMGetPanePtr(menu, p_num);
    if (p_ptr == NULL) return(XM_FAILURE);

    /*
     * Remove the pane from the association table.
     */
    XDeleteAssoc(display, menu->assoc_tab, p_ptr->window);

    /*
     * Remove the pane from the pane list and update
     * the pane count.
     */
    emacs_remque(p_ptr);
    menu->p_count--;

    /*
     * Remove all the selections in the pane from the
     * association table and free their XMSelect structures.
     */
    for (
	s_ptr = p_ptr->s_list->next;
	s_ptr != p_ptr->s_list;
	s_ptr = s_next
    ) {
	XDeleteAssoc(display, menu->assoc_tab, s_ptr->window);
	s_next = s_ptr->next;
	free(s_ptr);
    }
    free(p_ptr->s_list);

    if (p_ptr->window) {
	/*
	 * Destroy the selection transparencies.
	 */
	XDestroySubwindows(display, p_ptr->window);

	/*
	 * Destroy the pane window.
	 */
	XDestroyWindow(display, p_ptr->window);
    }

    /*
     * Free the pane's XMPane structure.
     */
    free(p_ptr);

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

    /*
     * Return the pane number just deleted.
     */
    _XMErrorCode = XME_NO_ERROR;
    return(p_num);
}