mc/lib/widget/check.c

/*
   Widgets for the Midnight Commander

   Copyright (C) 1994-2023
   Free Software Foundation, Inc.

   Authors:
   Radek Doulik, 1994, 1995
   Miguel de Icaza, 1994, 1995
   Jakub Jelinek, 1995
   Andrej Borsenkow, 1996
   Norbert Warmuth, 1997
   Andrew Borodin <aborodin@vmail.ru>, 2009-2022

   This file is part of the Midnight Commander.

   The Midnight Commander is free software: you can redistribute it
   and/or modify it under the terms of the GNU General Public License as
   published by the Free Software Foundation, either version 3 of the License,
   or (at your option) any later version.

   The Midnight Commander is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

/** \file check.c
 *  \brief Source: WCheck widget (checkbutton)
 */

#include <config.h>

#include <stdlib.h>

#include "lib/global.h"

#include "lib/tty/tty.h"
#include "lib/widget.h"

/*** global variables ****************************************************************************/

/*** file scope macro definitions ****************************************************************/

/*** file scope type declarations ****************************************************************/

/*** forward declarations (file scope functions) *************************************************/

/*** file scope variables ************************************************************************/

/* --------------------------------------------------------------------------------------------- */
/*** file scope functions ************************************************************************/
/* --------------------------------------------------------------------------------------------- */

static cb_ret_t
check_callback (Widget * w, Widget * sender, widget_msg_t msg, int parm, void *data)
{
    WCheck *c = CHECK (w);

    switch (msg)
    {
    case MSG_HOTKEY:
        if (c->text.hotkey != NULL)
        {
            if (g_ascii_tolower ((gchar) c->text.hotkey[0]) == parm)
            {
                /* make action */
                send_message (w, sender, MSG_KEY, ' ', data);
                return MSG_HANDLED;
            }
        }
        return MSG_NOT_HANDLED;

    case MSG_KEY:
        if (parm != ' ')
            return MSG_NOT_HANDLED;
        c->state = !c->state;
        widget_draw (w);
        send_message (w->owner, w, MSG_NOTIFY, 0, NULL);
        return MSG_HANDLED;

    case MSG_CURSOR:
        widget_gotoyx (w, 0, 1);
        return MSG_HANDLED;

    case MSG_DRAW:
        {
            gboolean focused;

            focused = widget_get_state (w, WST_FOCUSED);
            widget_selectcolor (w, focused, FALSE);
            widget_gotoyx (w, 0, 0);
            tty_print_string (c->state ? "[x] " : "[ ] ");
            hotkey_draw (w, c->text, focused);
            return MSG_HANDLED;
        }

    case MSG_DESTROY:
        hotkey_free (c->text);
        return MSG_HANDLED;

    default:
        return widget_default_callback (w, sender, msg, parm, data);
    }
}

/* --------------------------------------------------------------------------------------------- */

static void
check_mouse_callback (Widget * w, mouse_msg_t msg, mouse_event_t * event)
{
    (void) event;

    switch (msg)
    {
    case MSG_MOUSE_DOWN:
        widget_select (w);
        break;

    case MSG_MOUSE_CLICK:
        send_message (w, NULL, MSG_KEY, ' ', NULL);
        send_message (w->owner, w, MSG_POST_KEY, ' ', NULL);
        break;

    default:
        break;
    }
}

/* --------------------------------------------------------------------------------------------- */
/*** public functions ****************************************************************************/
/* --------------------------------------------------------------------------------------------- */

WCheck *
check_new (int y, int x, gboolean state, const char *text)
{
    WRect r = { y, x, 1, 1 };
    WCheck *c;
    Widget *w;

    c = g_new (WCheck, 1);
    w = WIDGET (c);
    c->text = hotkey_new (text);
    /* 4 is width of "[X] " */
    r.cols = 4 + hotkey_width (c->text);
    widget_init (w, &r, check_callback, check_mouse_callback);
    w->options |= WOP_SELECTABLE | WOP_WANT_CURSOR | WOP_WANT_HOTKEY;
    c->state = state;

    return c;
}

/* --------------------------------------------------------------------------------------------- */

void
check_set_text (WCheck * check, const char *text)
{
    Widget *w = WIDGET (check);
    hotkey_t hk;

    hk = hotkey_new (text);
    if (hotkey_equal (check->text, hk))
    {
        hotkey_free (hk);
        return;
    }

    hotkey_free (check->text);
    check->text = hk;

    if (check->text.start[0] == '\0' && check->text.hotkey == NULL && check->text.end == NULL)
        w->rect.cols = 3;       /* "[ ]" */
    else
        w->rect.cols = 4 + hotkey_width (check->text);  /* "[ ]  text" */

    widget_draw (w);
}

/* --------------------------------------------------------------------------------------------- */