oldXMenu/InsPane.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  *      XMenuInsertPane - Inserts a pane into an XMenu object in
  10  *                        a particular position.
  11  *
  12  *      Author:         Tony Della Fera, DEC
  13  *                      20-Nov-85
  14  *
  15  */
  16
  17 #include <config.h>
  18 #include "XMenuInt.h"
  19
  20 int
  21 XMenuInsertPane(register XMenu *menu, register int p_num, char *label, int active)
  22                                 /* Menu object to be modified. */
  23                                 /* Pane number of new pane. */
  24                                 /* Selection label. */
  25                                 /* Make selection active? */
  26 {
  27     register XMPane *p_ptr;     /* XMPane pointer. */
  28     register XMPane *pane;      /* Newly created pane. */
  29     register XMSelect *sel;     /* Initial selection for the new pane. */
  30
  31     int label_length;           /* Label length in characters. */
  32     int label_width;            /* Label width in pixels. */
  33
  34     /*
  35      * Check for NULL pointers!
  36      */
  37     if (label == NULL) {
  38         _XMErrorCode = XME_ARG_BOUNDS;
  39         return(XM_FAILURE);
  40     }
  41
  42     /*
  43      * Find the pane number one less than the one specified since that
  44      * is the pane after which the insertion will occur.
  45      */
  46     p_ptr = _XMGetPanePtr(menu, (p_num - 1));
  47     if (p_ptr == NULL) return(XM_FAILURE);
  48
  49     /*
  50      * Calloc the XMPane structure and the initial XMSelect.
  51      */
  52     pane = (XMPane *)calloc(1, sizeof(XMPane));
  53     if (pane == NULL) {
  54         _XMErrorCode = XME_CALLOC;
  55         return(XM_FAILURE);
  56     }
  57     sel = (XMSelect *)calloc(1, sizeof(XMSelect));
  58     if (sel == NULL) {
  59         _XMErrorCode = XME_CALLOC;
  60         return(XM_FAILURE);
  61     }
  62
  63     /*
  64      * Determine label size.
  65      */
  66     label_length = strlen(label);
  67     label_width = XTextWidth(menu->p_fnt_info, label, label_length);
  68
  69     /*
  70      * Set up the initial selection.
  71      * Values not explicitly set are zeroed by calloc.
  72      */
  73     sel->next = sel;
  74     sel->prev = sel;
  75     sel->type = SL_HEADER;
  76     sel->serial = -1;
  77     sel->parent_p = pane;
  78
  79     /*
  80      * Fill the XMPane structure.
  81      */
  82     pane->type = PANE;
  83     pane->active = active;
  84     pane->serial = -1;
  85     pane->label = label;
  86     pane->label_width = label_width;
  87     pane->label_length = label_length;
  88     pane->s_list = sel;
  89
  90     /*
  91      * Insert the pane after the pane with the pane
  92      * number one less than the desired number for the
  93      * new pane.
  94      */
  95     emacs_insque(pane, p_ptr);
  96
  97     /*
  98      * Update the pane count.
  99      */
 100     menu->p_count++;
 101
 102     /*
 103      * Schedule a recompute.
 104      */
 105     menu->recompute = 1;
 106
 107     /*
 108      * Return the number of the pane just added.
 109      */
 110     _XMErrorCode = XME_NO_ERROR;
 111     return(p_num);
 112 }