oldXMenu/AddSel.c

   1 #include "copyright.h"
   2
   3 /* $Header: /gd/gnu/cvsroot/emacs/oldXMenu/AddSel.c,v 1.1 1999/10/03 19:34:52 fx Exp $ */
   4 /* Copyright    Massachusetts Institute of Technology    1985   */
   5
   6 /*
   7  * XMenu:       MIT Project Athena, X Window system menu package
   8  *
   9  *      XMenuAddSelection - Adds a selection to an XMenu object.
  10  *
  11  *      Author:         Tony Della Fera, DEC
  12  *                      August, 1985
  13  *
  14  */
  15
  16 #include <config.h>
  17 #include "XMenuInt.h"
  18
  19 int
  20 XMenuAddSelection(display, menu, p_num, data, label, active, help)
  21     Display *display;
  22     register XMenu *menu;       /* Menu object to be modified. */
  23     register int p_num;         /* Pane number to be modified. */
  24     char *data;                 /* Data value. */
  25     char *label;                /* Selection label. */
  26     int active;                 /* Make selection active? */
  27     char *help;                 /* Help string */
  28 {
  29     register XMPane *pane;      /* Pane containing the new selection. */
  30     register XMSelect *select;  /* Newly created selection. */
  31
  32
  33     int label_length;           /* Label lenght in characters. */
  34     int label_width;            /* Label width in pixels. */
  35
  36     /*
  37      * Check for NULL pointers!
  38      */
  39     if (label == NULL) {
  40         _XMErrorCode = XME_ARG_BOUNDS;
  41         return(XM_FAILURE);
  42     }
  43     /*
  44      * Find the right pane.
  45      */
  46     pane = _XMGetPanePtr(menu, p_num);
  47     if (pane == NULL) return(XM_FAILURE);
  48
  49     /*
  50      * Calloc the XMSelect structure.
  51      */
  52     select = (XMSelect *)calloc(1, sizeof(XMSelect));
  53     if (select == NULL) {
  54         _XMErrorCode = XME_CALLOC;
  55         return(XM_FAILURE);
  56     }
  57     /*
  58      * Determine label size.
  59      */
  60     label_length = strlen(label);
  61     label_width = XTextWidth(menu->s_fnt_info, label, label_length);
  62
  63     /*
  64      * Fill the XMSelect structure.
  65      */
  66     if (!strcmp (label, "--") || !strcmp (label, "---"))
  67       {
  68         select->type = SEPARATOR;
  69         select->active = 0;
  70       }
  71     else
  72       {
  73         select->type = SELECTION;
  74         select->active = active;
  75       }
  76
  77     select->serial = -1;
  78     select->label = label;
  79     select->label_width = label_width;
  80     select->label_length = label_length;
  81     select->data = data;
  82     select->parent_p = pane;
  83     select->help_string = help;
  84
  85     /*
  86      * Insert the selection at the end of the selection list.
  87      */
  88     emacs_insque(select, pane->s_list->prev);
  89
  90     /*
  91      * Update the selection count.
  92      */
  93     pane->s_count++;
  94
  95     /*
  96      * Schedule a recompute.
  97      */
  98     menu->recompute = 1;
  99
 100     /*
 101      * Return the selection number just added.
 102      */
 103     _XMErrorCode = XME_NO_ERROR;
 104     return((pane->s_count - 1));
 105 }