source: trunk/third/emacs/oldXMenu/AddSel.c @ 8996

#include "copyright.h"

/* $Header: /afs/dev.mit.edu/source/repository/third/emacs/oldXMenu/AddSel.c,v 1.1.1.1 1996-09-26 00:59:42 ghudson Exp $ */
/* Copyright    Massachusetts Institute of Technology    1985   */

/*
 * 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 <config.h>
#include "XMenuInt.h"

int
XMenuAddSelection(display, menu, p_num, data, label, active)
    Display *display;
    register XMenu *menu;       /* Menu object to be modified. */
    register int p_num;         /* Pane number to be modified. */
    char *data;                 /* Data value. */
    char *label;                /* Selection label. */
    int active;                 /* Make selection active? */
{
    register XMPane *pane;      /* Pane containing the new selection. */
    register XMSelect *select;  /* Newly created selection. */


    int label_length;           /* Label lenght 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.
     */
    select = (XMSelect *)calloc(1, sizeof(XMSelect));
    if (select == 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, "---"))
      {
        select->type = SEPARATOR;
        select->active = 0;
      }
    else
      {
        select->type = SELECTION;
        select->active = active;
      }

    select->serial = -1;
    select->label = label;
    select->label_width = label_width;
    select->label_length = label_length;
    select->data = data;
    select->parent_p = pane;
    
    /*
     * Insert the selection at the end of the selection list.
     */
    emacs_insque(select, 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));
}