code.delx.au - gnu-emacs/blob - oldXMenu/ChgPane.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  *      XMenuChangePane - Change the label of a  menu pane.
  10  *
  11  *      Author:         Tony Della Fera, DEC
  12  *                      December 19, 1985
  13  *
  14  */
  15
  16 #include <config.h>
  17 #include "XMenuInt.h"
  18
  19 int
  20 XMenuChangePane(register XMenu *menu, register int p_num, char *label)
  21                                 /* Menu object to be modified. */
  22                                 /* Pane number to be modified. */
  23                                 /* Selection label. */
  24 {
  25     register XMPane *p_ptr;     /* XMPane pointer. */
  26
  27     int label_length;           /* Label length in characters. */
  28     int label_width;            /* Label width in pixels. */
  29
  30     /*
  31      * Check for NULL pointers!
  32      */
  33     if (label == NULL) {
  34         _XMErrorCode = XME_ARG_BOUNDS;
  35         return(XM_FAILURE);
  36     }
  37
  38     /*
  39      * Find the right pane.
  40      */
  41     p_ptr = _XMGetPanePtr(menu, p_num);
  42     if (p_ptr == NULL) return(XM_FAILURE);
  43
  44     /*
  45      * Determine label size.
  46      */
  47     label_length = strlen(label);
  48     label_width = XTextWidth(menu->p_fnt_info, label, label_length);
  49
  50     /*
  51      * Change the pane data.
  52      */
  53     p_ptr->label = label;
  54     p_ptr->label_width = label_width;
  55     p_ptr->label_length = label_length;
  56
  57     /*
  58      * Schedule a recompute.
  59      */
  60     menu->recompute = 1;
  61
  62     /*
  63      * Return the pane number just changed.
  64      */
  65     _XMErrorCode = XME_NO_ERROR;
  66     return(p_num);
  67 }
  68