mc/lib/widget/listbox-window.c

/*
   Widget based utility functions.

   Copyright (C) 1994-2014
   The Free Software Foundation, Inc.

   Authors:
   Miguel de Icaza, 1994, 1995, 1996
   Radek Doulik, 1994, 1995
   Jakub Jelinek, 1995
   Andrej Borsenkow, 1995
   Andrew Borodin <aborodin@vmail.ru>, 2009, 2010, 2013

   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 listbox-window.c
 *  \brief Source: Listbox widget, a listbox within dialog window
 */

#include <config.h>

#include <stdlib.h>

#include "lib/global.h"
#include "lib/tty/tty.h"        /* COLS */
#include "lib/skin.h"
#include "lib/strutil.h"        /* str_term_width1() */
#include "lib/widget.h"

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

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

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

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

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

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

Listbox *
create_listbox_window_centered (int center_y, int center_x, int lines, int cols,
                                const char *title, const char *help)
{
    const int space = 4;

    int xpos, ypos;
    Listbox *listbox;

    /* Adjust sizes */
    lines = min (lines, LINES - 6);

    if (title != NULL)
    {
        int len;

        len = str_term_width1 (title) + 4;
        cols = max (cols, len);
    }

    cols = min (cols, COLS - 6);

    /* adjust position */
    if ((center_y < 0) || (center_x < 0))
    {
        ypos = LINES / 2;
        xpos = COLS / 2;
    }
    else
    {
        ypos = center_y;
        xpos = center_x;
    }

    ypos -= lines / 2;
    xpos -= cols / 2;

    if (ypos + lines >= LINES)
        ypos = LINES - lines - space;
    if (ypos < 0)
        ypos = 0;

    if (xpos + cols >= COLS)
        xpos = COLS - cols - space;
    if (xpos < 0)
        xpos = 0;

    listbox = g_new (Listbox, 1);

    listbox->dlg =
        dlg_create (TRUE, ypos, xpos, lines + space, cols + space,
                    listbox_colors, NULL, NULL, help, title, DLG_TRYUP);

    listbox->list = listbox_new (2, 2, lines, cols, FALSE, NULL);
    add_widget (listbox->dlg, listbox->list);

    return listbox;
}

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

Listbox *
create_listbox_window (int lines, int cols, const char *title, const char *help)
{
    return create_listbox_window_centered (-1, -1, lines, cols, title, help);
}

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

/** Returns the number of the item selected */
int
run_listbox (Listbox * l)
{
    int val = -1;

    if (dlg_run (l->dlg) != B_CANCEL)
        val = l->list->pos;
    dlg_destroy (l->dlg);
    g_free (l);
    return val;
}

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