AddSel.c 2.34 KB
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/* Copyright    Massachusetts Institute of Technology    1985	*/

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#include "copyright.h"


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

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

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

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                         	/* Menu object to be modified. */
                       		/* Pane number to be modified. */
               			/* Data value. */
                		/* Selection label. */
               			/* Make selection active? */
               			/* Help string */
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{
    register XMPane *pane;	/* Pane containing the new selection. */
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    register XMSelect *sel;	/* Newly created selection. */
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    int label_length;		/* Label length in characters. */
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    int label_width;		/* Label width in pixels. */
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    /*
     * 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.
     */
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    sel = (XMSelect *)calloc(1, sizeof(XMSelect));
    if (sel == NULL) {
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	_XMErrorCode = XME_CALLOC;
	return(XM_FAILURE);
    }
    /*
     * Determine label size.
     */
    label_length = strlen(label);
    label_width = XTextWidth(menu->s_fnt_info, label, label_length);
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    /*
     * Fill the XMSelect structure.
     */
    if (!strcmp (label, "--") || !strcmp (label, "---"))
      {
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	sel->type = SEPARATOR;
	sel->active = 0;
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      }
    else
      {
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	sel->type = SELECTION;
	sel->active = active;
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      }

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