oldXMenu/AddPane.c

   1 /* Copyright    Massachusetts Institute of Technology    1985   */
   2
   3 #include "copyright.h"
   4
   5 /*
   6  * XMenu:       MIT Project Athena, X Window system menu package
   7  *
   8  *      XMenuAddPane - Adds a pane to an XMenu object.
   9  *
  10  *      Author:         Tony Della Fera, DEC
  11  *                      August, 1985
  12  *
  13  */
  14
  15 #include <string.h>
  16 #include "XMenuInt.h"
  17
  18 int
  19 XMenuAddPane(Display *display, register XMenu *menu, register char const *label, int active)
  20
  21                                 /* Menu object to be modified. */
  22                                 /* Selection label. */
  23                                 /* Make selection active? */
  24 {
  25     register XMPane *pane;      /* Newly created pane. */
  26     register XMSelect *sel;     /* Initial selection for the new pane. */
  27
  28     int label_length;           /* Label length in characters. */
  29     int label_width;            /* Label width in pixels. */
  30
  31     /*
  32      * Check for NULL pointers!
  33      */
  34     if (label == NULL) {
  35         _XMErrorCode = XME_ARG_BOUNDS;
  36         return(XM_FAILURE);
  37     }
  38
  39     /*
  40      * Calloc the XMPane structure and the initial XMSelect.
  41      */
  42     pane = (XMPane *)calloc(1, sizeof(XMPane));
  43     if (pane == NULL) {
  44         _XMErrorCode = XME_CALLOC;
  45         return(XM_FAILURE);
  46     }
  47     sel = (XMSelect *)calloc(1, sizeof(XMSelect));
  48     if (sel == NULL) {
  49         _XMErrorCode = XME_CALLOC;
  50         return(XM_FAILURE);
  51     }
  52
  53     /*
  54      * Determine label size.
  55      */
  56     label_length = strlen(label);
  57     label_width = XTextWidth(menu->p_fnt_info,
  58                              label,
  59                              label_length);
  60
  61     /*
  62      * Set up the initial selection.
  63      * Values not explicitly set are zeroed by calloc.
  64      */
  65     sel->next = sel;
  66     sel->prev = sel;
  67     sel->type = SL_HEADER;
  68     sel->serial = -1;
  69     sel->parent_p = pane;
  70
  71     /*
  72      * Fill the XMPane structure.
  73      * X and Y position are set to 0 since a recompute will follow.
  74      */
  75     pane->type = PANE;
  76     pane->active = active;
  77     pane->serial = -1;
  78     pane->label = label;
  79     pane->label_width = label_width;
  80     pane->label_length = label_length;
  81     pane->s_list = sel;
  82
  83     /*
  84      * Insert the pane at the end of the pane list.
  85      */
  86     emacs_insque(pane, menu->p_list->prev);
  87
  88     /*
  89      * Update the pane count.
  90      */
  91     menu->p_count++;
  92
  93     /*
  94      * Schedule a recompute.
  95      */
  96     menu->recompute = 1;
  97
  98     /*
  99      * Return the pane number just added.
 100      */
 101     _XMErrorCode = XME_NO_ERROR;
 102     return((menu->p_count - 1));
 103 }