oldXMenu/ChgSel.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  *      XMenuChangeSelection - Change a menu selection.
  10  *
  11  *      Author:         Tony Della Fera, DEC
  12  *                      December 19, 1985
  13  *
  14  */
  15
  16 #include "XMenuInt.h"
  17
  18 int
  19 XMenuChangeSelection(Display *display, register XMenu *menu, register int p_num, register int s_num, char *data, int data_sw, char *label, int label_sw)
  20                                 /* previously opened display. */
  21                                 /* Menu object to be modified. */
  22                                 /* Pane number to be modified. */
  23                                 /* Selection number to modified. */
  24                                 /* Data value. */
  25                                 /* Change to new data value? */
  26                                 /* Selection label. */
  27                                 /* Change to new label? */
  28 {
  29     register XMPane *p_ptr;     /* XMPane pointer. */
  30     register XMSelect *s_ptr;   /* XMSelect pointer. */
  31
  32     int label_length;           /* Label length in characters. */
  33     int label_width;            /* Label width in pixels. */
  34
  35     /*
  36      * Check for NULL pointers!
  37      */
  38     if (label == NULL) {
  39         _XMErrorCode = XME_ARG_BOUNDS;
  40         return(XM_FAILURE);
  41     }
  42
  43     /*
  44      * Find the right pane.
  45      */
  46     p_ptr = _XMGetPanePtr(menu, p_num);
  47     if (p_ptr == NULL) return(XM_FAILURE);
  48
  49     /*
  50      * Find the right selection.
  51      */
  52     s_ptr = _XMGetSelectionPtr(p_ptr, s_num);
  53     if (s_ptr == NULL) return(XM_FAILURE);
  54
  55     /*
  56      * Reset the label?
  57      */
  58     if (label_sw) {
  59         /*
  60          * Determine label size.
  61          */
  62         label_length = strlen(label);
  63         label_width = XTextWidth(menu->s_fnt_info, label, label_length);
  64
  65         /*
  66          * Change the selection data.
  67          */
  68         s_ptr->label = label;
  69         s_ptr->label_width = label_width;
  70         s_ptr->label_length = label_length;
  71
  72         /*
  73          * Schedule a recompute.
  74          */
  75         menu->recompute = 1;
  76     }
  77
  78     /*
  79      * Reset the data?
  80      */
  81     if (data_sw) s_ptr->data = data;
  82
  83     /*
  84      * Return successfully.
  85      */
  86     _XMErrorCode = XME_NO_ERROR;
  87     return(s_num);
  88 }