lib/widget/listbox-window.c

   1 /*
   2    Widget based utility functions.
   3
   4    Copyright (C) 1994, 1995, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
   5    2005, 2006, 2007, 2008, 2009, 2010, 2011
   6    The Free Software Foundation, Inc.
   7
   8    Authors:
   9    Miguel de Icaza, 1994, 1995, 1996
  10    Radek Doulik, 1994, 1995
  11    Jakub Jelinek, 1995
  12    Andrej Borsenkow, 1995
  13    Andrew Borodin <aborodin@vmail.ru>, 2009, 2010
  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 listbox-window.c
  32  *  \brief Source: Listbox widget, a listbox within dialog window
  33  */
  34
  35 #include <config.h>
  36
  37 #include <stdlib.h>
  38
  39 #include "lib/global.h"
  40 #include "lib/tty/tty.h"        /* COLS */
  41 #include "lib/skin.h"
  42 #include "lib/strutil.h"        /* str_term_width1() */
  43 #include "lib/widget.h"
  44
  45 /*** global variables ****************************************************************************/
  46
  47 /*** file scope macro definitions ****************************************************************/
  48
  49 /*** file scope type declarations ****************************************************************/
  50
  51 /*** file scope variables ************************************************************************/
  52
  53 /*** file scope functions ************************************************************************/
  54
  55 /* --------------------------------------------------------------------------------------------- */
  56 /*** public functions ****************************************************************************/
  57 /* --------------------------------------------------------------------------------------------- */
  58
  59 Listbox *
  60 create_listbox_window_centered (int center_y, int center_x, int lines, int cols,
  61                                 const char *title, const char *help)
  62 {
  63     const dlg_colors_t listbox_colors = {
  64         PMENU_ENTRY_COLOR,
  65         PMENU_SELECTED_COLOR,
  66         PMENU_ENTRY_COLOR,
  67         PMENU_SELECTED_COLOR,
  68         PMENU_TITLE_COLOR
  69     };
  70
  71     const int space = 4;
  72
  73     int xpos, ypos, len;
  74     Listbox *listbox;
  75
  76     /* Adjust sizes */
  77     lines = min (lines, LINES - 6);
  78
  79     if (title != NULL)
  80     {
  81         len = str_term_width1 (title) + 4;
  82         cols = max (cols, len);
  83     }
  84
  85     cols = min (cols, COLS - 6);
  86
  87     /* adjust position */
  88     if ((center_y < 0) || (center_x < 0))
  89     {
  90         ypos = LINES / 2;
  91         xpos = COLS / 2;
  92     }
  93     else
  94     {
  95         ypos = center_y;
  96         xpos = center_x;
  97     }
  98
  99     ypos -= lines / 2;
 100     xpos -= cols / 2;
 101
 102     if (ypos + lines >= LINES)
 103         ypos = LINES - lines - space;
 104     if (ypos < 0)
 105         ypos = 0;
 106
 107     if (xpos + cols >= COLS)
 108         xpos = COLS - cols - space;
 109     if (xpos < 0)
 110         xpos = 0;
 111
 112     listbox = g_new (Listbox, 1);
 113
 114     listbox->dlg =
 115         create_dlg (TRUE, ypos, xpos, lines + space, cols + space,
 116                     listbox_colors, NULL, NULL, help, title, DLG_REVERSE | DLG_TRYUP);
 117
 118     listbox->list = listbox_new (2, 2, lines, cols, FALSE, NULL);
 119     add_widget (listbox->dlg, listbox->list);
 120
 121     return listbox;
 122 }
 123
 124 /* --------------------------------------------------------------------------------------------- */
 125
 126 Listbox *
 127 create_listbox_window (int lines, int cols, const char *title, const char *help)
 128 {
 129     return create_listbox_window_centered (-1, -1, lines, cols, title, help);
 130 }
 131
 132 /* --------------------------------------------------------------------------------------------- */
 133
 134 /** Returns the number of the item selected */
 135 int
 136 run_listbox (Listbox * l)
 137 {
 138     int val = -1;
 139
 140     if (run_dlg (l->dlg) != B_CANCEL)
 141         val = l->list->pos;
 142     destroy_dlg (l->dlg);
 143     g_free (l);
 144     return val;
 145 }
 146
 147 /* --------------------------------------------------------------------------------------------- */