oldXMenu/AddSel.c

   1 /* Copyright    Massachusetts Institute of Technology    1985   */
   2
   3 #include "copyright.h"
   4
   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 <string.h>
  17 #include "XMenuInt.h"
  18
  19 int
  20 XMenuAddSelection(Display *display, register XMenu *menu, register int p_num, char *data, char *label, int active, char const *help)
  21
  22                                 /* Menu object to be modified. */
  23                                 /* Pane number to be modified. */
  24                                 /* Data value. */
  25                                 /* Selection label. */
  26                                 /* Make selection active? */
  27                                 /* Help string */
  28 {
  29     register XMPane *pane;      /* Pane containing the new selection. */
  30     register XMSelect *sel;     /* Newly created selection. */
  31
  32
  33     int label_length;           /* Label length 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     sel = (XMSelect *)calloc(1, sizeof(XMSelect));
  53     if (sel == 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         sel->type = SEPARATOR;
  69         sel->active = 0;
  70       }
  71     else
  72       {
  73         sel->type = SELECTION;
  74         sel->active = active;
  75       }
  76
  77     sel->serial = -1;
  78     sel->label = label;
  79     sel->label_width = label_width;
  80     sel->label_length = label_length;
  81     sel->data = data;
  82     sel->parent_p = pane;
  83     sel->help_string = help;
  84
  85     /*
  86      * Insert the selection at the end of the selection list.
  87      */
  88     emacs_insque(sel, 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 }