src/bfu/widget.h

   1 #ifndef EL__BFU_WIDGET_H
   2 #define EL__BFU_WIDGET_H
   3
   4 /* XXX: Include common definitions first */
   5 #include "bfu/common.h"
   6
   7 #include "bfu/button.h"
   8 #include "bfu/checkbox.h"
   9 #include "bfu/group.h"
  10 #include "bfu/inpfield.h"
  11 #include "bfu/inphist.h"
  12 #include "bfu/leds.h"
  13 #include "bfu/listbox.h"
  14 #include "bfu/msgbox.h"
  15 #include "bfu/text.h"
  16 #include "util/lists.h"
  17 #include "util/box.h"
  18
  19 struct dialog_data;
  20
  21
  22 struct widget_ops {
  23         /* XXX: Order matters here. --Zas */
  24         widget_handler_T *display;
  25         widget_handler_T *init;
  26         widget_handler_T *mouse;
  27         widget_handler_T *kbd;
  28         widget_handler_T *select;
  29         widget_handler_T *clear;
  30 };
  31
  32 struct widget {
  33         const struct widget_ops *ops;
  34
  35         unsigned char *text;
  36
  37         widget_handler_T *handler;
  38
  39         void *data;
  40         int datalen;    /* 0 = no alloc/copy to cdata. */
  41
  42         union {
  43                 struct widget_info_checkbox checkbox;
  44                 struct widget_info_field field;
  45                 struct widget_info_button button;
  46                 struct widget_info_text text;
  47         } info;
  48
  49         enum widget_type type;
  50 };
  51
  52 struct widget_data {
  53         struct widget *widget;
  54
  55         /* For WIDGET_FIELD: @cdata is in the charset of the terminal.
  56          * (That charset can be UTF-8 only if CONFIG_UTF8 is defined,
  57          * and is assumed to be unibyte otherwise.)  The UTF-8 I/O
  58          * option has no effect here.
  59          *
  60          * For WIDGET_TEXT: @cdata is cast from/to an unsigned char **
  61          * that points to the first element of an array.  Each element
  62          * in this array corresponds to one line of text, and is an
  63          * unsigned char * that points to the first character of that
  64          * line.  The array has @widget_data.info.text.lines elements.
  65          *
  66          * For WIDGET_LISTBOX: @cdata points to struct listbox_data.  */
  67         unsigned char *cdata;
  68
  69         struct box box;
  70
  71         union {
  72                 struct widget_data_info_field field;
  73                 struct widget_data_info_checkbox checkbox;
  74                 struct widget_data_info_text text;
  75         } info;
  76 };
  77
  78 void display_widget(struct dialog_data *, struct widget_data *);
  79
  80 static inline int
  81 widget_is_focusable(struct widget_data *widget_data)
  82 {
  83         switch (widget_data->widget->type) {
  84                 case WIDGET_LISTBOX: return 0;
  85                 case WIDGET_TEXT: return text_is_scrollable(widget_data);
  86                 default: return 1;
  87         }
  88 }
  89
  90
  91 #endif