menuitem.h

   1 /*
   2 Calf Box, an open source musical instrument.
   3 Copyright (C) 2010-2011 Krzysztof Foltman
   4
   5 This program is free software: you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation, either version 3 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 */
  18
  19 #ifndef CBOX_MENUITEM_H
  20 #define CBOX_MENUITEM_H
  21
  22 #include <glib.h>
  23 #include <ncurses.h>
  24 #include <stdint.h>
  25
  26 struct cbox_menu;
  27 struct cbox_menu_item;
  28 struct cbox_menu_item_command;
  29 struct cbox_menu_item_static;
  30 struct cbox_menu_item_menu;
  31 struct cbox_menu_state;
  32
  33 struct cbox_menu_measure
  34 {
  35     int label_width;
  36     int value_width;
  37     int height;
  38 };
  39
  40 struct cbox_menu_item_class
  41 {
  42     void (*measure)(struct cbox_menu_item *item, struct cbox_menu_state *state);
  43     void (*draw)(struct cbox_menu_item *item, struct cbox_menu_state *state, gchar *value, int hilited);
  44     gchar *(*format_value)(const struct cbox_menu_item *item, struct cbox_menu_state *state);
  45     int (*on_key)(struct cbox_menu_item *item, struct cbox_menu_state *state, int key);
  46     int (*on_idle)(struct cbox_menu_item *item, struct cbox_menu_state *state);
  47     void (*destroy)(struct cbox_menu_item *item);
  48
  49 };
  50
  51 typedef int (*cbox_menu_item_execute_func)(struct cbox_menu_item_command *item, void *context);
  52 typedef char *(*cbox_menu_item_format_value)(const struct cbox_menu_item_static *item, void *context);
  53
  54 struct cbox_menu_item
  55 {
  56     gchar *label;
  57     struct cbox_menu_item_class *item_class;
  58     void *item_context;
  59     int x, y;
  60     /* TODO: is_active? */
  61 };
  62
  63 struct cbox_menu_item_command
  64 {
  65     struct cbox_menu_item item;
  66     int (*execute)(struct cbox_menu_item_command *item, void *menu_context);
  67 };
  68
  69 struct cbox_menu_item_int
  70 {
  71     struct cbox_menu_item item;
  72     int *value;
  73     int vmin, vmax;
  74     const char *fmt;
  75     int (*on_change)(struct cbox_menu_item_int *item, void *menu_context);
  76 };
  77
  78 struct cbox_menu_item_double
  79 {
  80     struct cbox_menu_item item;
  81     double *value;
  82     double vmin, vmax;
  83     const char *fmt;
  84     double step_arg;
  85     double (*step)(struct cbox_menu_item_double *item, int where);
  86     int (*on_change)(struct cbox_menu_item_double *item, void *menu_context);
  87 };
  88
  89 struct cbox_menu_item_static
  90 {
  91     struct cbox_menu_item item;
  92     char *(*format_value)(const struct cbox_menu_item_static *item, void *menu_context);
  93 };
  94
  95 typedef struct cbox_menu *(*create_menu_func)(struct cbox_menu_item_menu *item, void *menu_context);
  96
  97 struct cbox_menu_item_menu
  98 {
  99     struct cbox_menu_item item;
 100     struct cbox_menu *menu;
 101     create_menu_func create_menu;
 102 };
 103
 104 extern struct cbox_menu_item *cbox_menu_item_new_command(const char *label, cbox_menu_item_execute_func exec, void *item_context);
 105 extern struct cbox_menu_item *cbox_menu_item_new_static(const char *label, cbox_menu_item_format_value fmt, void *item_context);
 106 extern struct cbox_menu_item *cbox_menu_item_new_int(const char *label, int *value, int vmin, int vmax, void *item_context);
 107 extern struct cbox_menu_item *cbox_menu_item_new_menu(const char *label, struct cbox_menu *menu, void *item_context);
 108 extern struct cbox_menu_item *cbox_menu_item_new_dynamic_menu(const char *label, create_menu_func func, void *item_context);
 109 extern void cbox_menu_item_destroy(struct cbox_menu_item *);
 110
 111 #endif