ui.c

   1 /*
   2 Calf Box, an open source musical instrument.
   3 Copyright (C) 2010 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 #include "ui.h"
  20
  21 #include <assert.h>
  22 #include <stdio.h>
  23 #include <ncurses.h>
  24
  25 void cbox_ui_start()
  26 {
  27     initscr();
  28     cbreak();
  29     noecho();
  30     start_color();
  31     keypad(stdscr, TRUE);
  32 }
  33
  34 int cbox_ui_run(struct cbox_ui_page *page)
  35 {
  36     int ch, res;
  37     if (page->draw)
  38         page->draw(page);
  39     if (page->on_idle)
  40         halfdelay(1);
  41     while(1)
  42     {
  43         ch = getch();
  44         if (ch == ERR && page->on_idle)
  45         {
  46             res = page->on_idle(page);
  47             if (res != 0)
  48                 return res;
  49             continue;
  50         }
  51         res = page->on_key(page, ch);
  52         if (res != 0)
  53             return res;
  54     }
  55     cbreak();
  56 }
  57
  58 void cbox_ui_stop()
  59 {
  60     endwin();
  61 }
  62