lib/widget/radio.c

   1 /*
   2    Widgets for the Midnight Commander
   3
   4    Copyright (C) 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003,
   5    2004, 2005, 2006, 2007, 2009, 2010, 2011
   6    The Free Software Foundation, Inc.
   7
   8    Authors:
   9    Radek Doulik, 1994, 1995
  10    Miguel de Icaza, 1994, 1995
  11    Jakub Jelinek, 1995
  12    Andrej Borsenkow, 1996
  13    Norbert Warmuth, 1997
  14    Andrew Borodin <aborodin@vmail.ru>, 2009, 2010
  15
  16    This file is part of the Midnight Commander.
  17
  18    The Midnight Commander is free software: you can redistribute it
  19    and/or modify it under the terms of the GNU General Public License as
  20    published by the Free Software Foundation, either version 3 of the License,
  21    or (at your option) any later version.
  22
  23    The Midnight Commander is distributed in the hope that it will be useful,
  24    but WITHOUT ANY WARRANTY; without even the implied warranty of
  25    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26    GNU General Public License for more details.
  27
  28    You should have received a copy of the GNU General Public License
  29    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  30  */
  31
  32 /** \file radio.c
  33  *  \brief Source: WRadui widget (radiobuttons)
  34  */
  35
  36 #include <config.h>
  37
  38 #include <stdlib.h>
  39
  40 #include "lib/global.h"
  41
  42 #include "lib/tty/tty.h"
  43 #include "lib/tty/mouse.h"
  44 #include "lib/widget.h"
  45
  46 /*** global variables ****************************************************************************/
  47
  48 /*** file scope macro definitions ****************************************************************/
  49
  50 /*** file scope type declarations ****************************************************************/
  51
  52 /*** file scope variables ************************************************************************/
  53
  54 /*** file scope functions ************************************************************************/
  55
  56 static cb_ret_t
  57 radio_callback (Widget * w, Widget * sender, widget_msg_t msg, int parm, void *data)
  58 {
  59     WRadio *r = RADIO (w);
  60     int i;
  61
  62     switch (msg)
  63     {
  64     case MSG_HOTKEY:
  65         {
  66             for (i = 0; i < r->count; i++)
  67             {
  68                 if (r->texts[i].hotkey != NULL)
  69                 {
  70                     int c = g_ascii_tolower ((gchar) r->texts[i].hotkey[0]);
  71
  72                     if (c != parm)
  73                         continue;
  74                     r->pos = i;
  75
  76                     /* Take action */
  77                     send_message (w, sender, MSG_KEY, ' ', data);
  78                     return MSG_HANDLED;
  79                 }
  80             }
  81         }
  82         return MSG_NOT_HANDLED;
  83
  84     case MSG_KEY:
  85         switch (parm)
  86         {
  87         case ' ':
  88             r->sel = r->pos;
  89             send_message (w->owner, w, MSG_ACTION, 0, NULL);
  90             send_message (w, sender, MSG_FOCUS, ' ', data);
  91             return MSG_HANDLED;
  92
  93         case KEY_UP:
  94         case KEY_LEFT:
  95             if (r->pos > 0)
  96             {
  97                 r->pos--;
  98                 return MSG_HANDLED;
  99             }
 100             return MSG_NOT_HANDLED;
 101
 102         case KEY_DOWN:
 103         case KEY_RIGHT:
 104             if (r->count - 1 > r->pos)
 105             {
 106                 r->pos++;
 107                 return MSG_HANDLED;
 108             }
 109         }
 110         return MSG_NOT_HANDLED;
 111
 112     case MSG_CURSOR:
 113         send_message (w->owner, w, MSG_ACTION, 0, NULL);
 114         send_message (w, sender, MSG_FOCUS, ' ', data);
 115         widget_move (r, r->pos, 1);
 116         return MSG_HANDLED;
 117
 118     case MSG_UNFOCUS:
 119     case MSG_FOCUS:
 120     case MSG_DRAW:
 121         for (i = 0; i < r->count; i++)
 122         {
 123             const gboolean focused = (i == r->pos && msg == MSG_FOCUS);
 124
 125             widget_selectcolor (w, focused, FALSE);
 126             widget_move (r, i, 0);
 127             tty_draw_hline (w->y + i, w->x, ' ', w->cols);
 128             tty_print_string ((r->sel == i) ? "(*) " : "( ) ");
 129             hotkey_draw (w, r->texts[i], focused);
 130         }
 131         return MSG_HANDLED;
 132
 133     case MSG_DESTROY:
 134         for (i = 0; i < r->count; i++)
 135             release_hotkey (r->texts[i]);
 136         g_free (r->texts);
 137         return MSG_HANDLED;
 138
 139     default:
 140         return widget_default_callback (w, sender, msg, parm, data);
 141     }
 142 }
 143
 144 /* --------------------------------------------------------------------------------------------- */
 145
 146 static int
 147 radio_event (Gpm_Event * event, void *data)
 148 {
 149     Widget *w = WIDGET (data);
 150
 151     if (!mouse_global_in_widget (event, w))
 152         return MOU_UNHANDLED;
 153
 154     if ((event->type & (GPM_DOWN | GPM_UP)) != 0)
 155     {
 156         WRadio *r = RADIO (data);
 157         Gpm_Event local;
 158
 159         local = mouse_get_local (event, w);
 160
 161         r->pos = local.y - 1;
 162         dlg_select_widget (w);
 163         if ((event->type & GPM_UP) != 0)
 164         {
 165             radio_callback (w, NULL, MSG_KEY, ' ', NULL);
 166             send_message (w->owner, w, MSG_POST_KEY, ' ', NULL);
 167         }
 168     }
 169
 170     return MOU_NORMAL;
 171 }
 172
 173 /* --------------------------------------------------------------------------------------------- */
 174 /*** public functions ****************************************************************************/
 175 /* --------------------------------------------------------------------------------------------- */
 176
 177 WRadio *
 178 radio_new (int y, int x, int count, const char **texts)
 179 {
 180     WRadio *r;
 181     Widget *w;
 182     int i, wmax = 0;
 183
 184     r = g_new (WRadio, 1);
 185     w = WIDGET (r);
 186
 187     /* Compute the longest string */
 188     r->texts = g_new (hotkey_t, count);
 189
 190     for (i = 0; i < count; i++)
 191     {
 192         int width;
 193
 194         r->texts[i] = parse_hotkey (texts[i]);
 195         width = hotkey_width (r->texts[i]);
 196         wmax = max (width, wmax);
 197     }
 198
 199     init_widget (w, y, x, count, 4 + wmax, radio_callback, radio_event);
 200     /* 4 is width of "(*) " */
 201     r->state = 1;
 202     r->pos = 0;
 203     r->sel = 0;
 204     r->count = count;
 205     widget_want_hotkey (w, TRUE);
 206
 207     return r;
 208 }
 209
 210 /* --------------------------------------------------------------------------------------------- */