lib/widget/check.c

   1 /*
   2    Widgets for the Midnight Commander
   3
   4    Copyright (C) 1994-2024
   5    Free Software Foundation, Inc.
   6
   7    Authors:
   8    Radek Doulik, 1994, 1995
   9    Miguel de Icaza, 1994, 1995
  10    Jakub Jelinek, 1995
  11    Andrej Borsenkow, 1996
  12    Norbert Warmuth, 1997
  13    Andrew Borodin <aborodin@vmail.ru>, 2009-2022
  14
  15    This file is part of the Midnight Commander.
  16
  17    The Midnight Commander is free software: you can redistribute it
  18    and/or modify it under the terms of the GNU General Public License as
  19    published by the Free Software Foundation, either version 3 of the License,
  20    or (at your option) any later version.
  21
  22    The Midnight Commander is distributed in the hope that it will be useful,
  23    but WITHOUT ANY WARRANTY; without even the implied warranty of
  24    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25    GNU General Public License for more details.
  26
  27    You should have received a copy of the GNU General Public License
  28    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  29  */
  30
  31 /** \file check.c
  32  *  \brief Source: WCheck widget (checkbutton)
  33  */
  34
  35 #include <config.h>
  36
  37 #include <stdlib.h>
  38
  39 #include "lib/global.h"
  40
  41 #include "lib/tty/tty.h"
  42 #include "lib/widget.h"
  43
  44 /*** global variables ****************************************************************************/
  45
  46 /*** file scope macro definitions ****************************************************************/
  47
  48 /*** file scope type declarations ****************************************************************/
  49
  50 /*** forward declarations (file scope functions) *************************************************/
  51
  52 /*** file scope variables ************************************************************************/
  53
  54 /* --------------------------------------------------------------------------------------------- */
  55 /*** file scope functions ************************************************************************/
  56 /* --------------------------------------------------------------------------------------------- */
  57
  58 static cb_ret_t
  59 check_callback (Widget *w, Widget *sender, widget_msg_t msg, int parm, void *data)
  60 {
  61     WCheck *c = CHECK (w);
  62
  63     switch (msg)
  64     {
  65     case MSG_HOTKEY:
  66         if (c->text.hotkey != NULL)
  67         {
  68             if (g_ascii_tolower ((gchar) c->text.hotkey[0]) == parm)
  69             {
  70                 /* make action */
  71                 send_message (w, sender, MSG_KEY, ' ', data);
  72                 return MSG_HANDLED;
  73             }
  74         }
  75         return MSG_NOT_HANDLED;
  76
  77     case MSG_KEY:
  78         if (parm != ' ')
  79             return MSG_NOT_HANDLED;
  80         c->state = !c->state;
  81         widget_draw (w);
  82         send_message (w->owner, w, MSG_NOTIFY, 0, NULL);
  83         return MSG_HANDLED;
  84
  85     case MSG_CURSOR:
  86         widget_gotoyx (w, 0, 1);
  87         return MSG_HANDLED;
  88
  89     case MSG_DRAW:
  90         {
  91             gboolean focused;
  92
  93             focused = widget_get_state (w, WST_FOCUSED);
  94             widget_selectcolor (w, focused, FALSE);
  95             widget_gotoyx (w, 0, 0);
  96             tty_print_string (c->state ? "[x] " : "[ ] ");
  97             hotkey_draw (w, c->text, focused);
  98             return MSG_HANDLED;
  99         }
 100
 101     case MSG_DESTROY:
 102         hotkey_free (c->text);
 103         return MSG_HANDLED;
 104
 105     default:
 106         return widget_default_callback (w, sender, msg, parm, data);
 107     }
 108 }
 109
 110 /* --------------------------------------------------------------------------------------------- */
 111
 112 static void
 113 check_mouse_callback (Widget *w, mouse_msg_t msg, mouse_event_t *event)
 114 {
 115     (void) event;
 116
 117     switch (msg)
 118     {
 119     case MSG_MOUSE_DOWN:
 120         widget_select (w);
 121         break;
 122
 123     case MSG_MOUSE_CLICK:
 124         send_message (w, NULL, MSG_KEY, ' ', NULL);
 125         send_message (w->owner, w, MSG_POST_KEY, ' ', NULL);
 126         break;
 127
 128     default:
 129         break;
 130     }
 131 }
 132
 133 /* --------------------------------------------------------------------------------------------- */
 134 /*** public functions ****************************************************************************/
 135 /* --------------------------------------------------------------------------------------------- */
 136
 137 WCheck *
 138 check_new (int y, int x, gboolean state, const char *text)
 139 {
 140     WRect r = { y, x, 1, 1 };
 141     WCheck *c;
 142     Widget *w;
 143
 144     c = g_new (WCheck, 1);
 145     w = WIDGET (c);
 146     c->text = hotkey_new (text);
 147     /* 4 is width of "[X] " */
 148     r.cols = 4 + hotkey_width (c->text);
 149     widget_init (w, &r, check_callback, check_mouse_callback);
 150     w->options |= WOP_SELECTABLE | WOP_WANT_CURSOR | WOP_WANT_HOTKEY;
 151     c->state = state;
 152
 153     return c;
 154 }
 155
 156 /* --------------------------------------------------------------------------------------------- */
 157
 158 void
 159 check_set_text (WCheck *check, const char *text)
 160 {
 161     Widget *w = WIDGET (check);
 162     hotkey_t hk;
 163
 164     hk = hotkey_new (text);
 165     if (hotkey_equal (check->text, hk))
 166     {
 167         hotkey_free (hk);
 168         return;
 169     }
 170
 171     hotkey_free (check->text);
 172     check->text = hk;
 173
 174     if (check->text.start[0] == '\0' && check->text.hotkey == NULL && check->text.end == NULL)
 175         w->rect.cols = 3;       /* "[ ]" */
 176     else
 177         w->rect.cols = 4 + hotkey_width (check->text);  /* "[ ]  text" */
 178
 179     widget_draw (w);
 180 }
 181
 182 /* --------------------------------------------------------------------------------------------- */