lib/widget/listbox-window.c

   1 /* Widget based utility functions.
   2    Copyright (C) 1994, 1995, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
   3    2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
   4
   5    Authors: 1994, 1995, 1996 Miguel de Icaza
   6    1994, 1995 Radek Doulik
   7    1995  Jakub Jelinek
   8    1995  Andrej Borsenkow
   9    2009, 2010 Andrew Borodin
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 2 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program; if not, write to the Free Software
  23    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  24
  25  */
  26
  27 /** \file listbox-window.c
  28  *  \brief Source: Listbox widget, a listbox within dialog window
  29  */
  30
  31 #include <config.h>
  32
  33 #include <stdlib.h>
  34
  35 #include "lib/global.h"
  36 #include "lib/tty/tty.h"        /* COLS */
  37 #include "lib/skin.h"
  38 #include "lib/strutil.h"        /* str_term_width1() */
  39 #include "lib/widget.h"
  40
  41 /*** global variables ****************************************************************************/
  42
  43 /*** file scope macro definitions ****************************************************************/
  44
  45 /*** file scope type declarations ****************************************************************/
  46
  47 /*** file scope variables ************************************************************************/
  48
  49 /*** file scope functions ************************************************************************/
  50
  51 /* --------------------------------------------------------------------------------------------- */
  52 /*** public functions ****************************************************************************/
  53 /* --------------------------------------------------------------------------------------------- */
  54
  55 Listbox *
  56 create_listbox_window_centered (int center_y, int center_x, int lines, int cols,
  57                                 const char *title, const char *help)
  58 {
  59     const dlg_colors_t listbox_colors = {
  60         PMENU_ENTRY_COLOR,
  61         PMENU_SELECTED_COLOR,
  62         PMENU_ENTRY_COLOR,
  63         PMENU_SELECTED_COLOR,
  64         PMENU_TITLE_COLOR
  65     };
  66
  67     const int space = 4;
  68
  69     int xpos, ypos, len;
  70     Listbox *listbox;
  71
  72     /* Adjust sizes */
  73     lines = min (lines, LINES - 6);
  74
  75     if (title != NULL)
  76     {
  77         len = str_term_width1 (title) + 4;
  78         cols = max (cols, len);
  79     }
  80
  81     cols = min (cols, COLS - 6);
  82
  83     /* adjust position */
  84     if ((center_y < 0) || (center_x < 0))
  85     {
  86         ypos = LINES / 2;
  87         xpos = COLS / 2;
  88     }
  89     else
  90     {
  91         ypos = center_y;
  92         xpos = center_x;
  93     }
  94
  95     ypos -= lines / 2;
  96     xpos -= cols / 2;
  97
  98     if (ypos + lines >= LINES)
  99         ypos = LINES - lines - space;
 100     if (ypos < 0)
 101         ypos = 0;
 102
 103     if (xpos + cols >= COLS)
 104         xpos = COLS - cols - space;
 105     if (xpos < 0)
 106         xpos = 0;
 107
 108     listbox = g_new (Listbox, 1);
 109
 110     listbox->dlg =
 111         create_dlg (TRUE, ypos, xpos, lines + space, cols + space,
 112                     listbox_colors, NULL, help, title, DLG_REVERSE | DLG_TRYUP);
 113
 114     listbox->list = listbox_new (2, 2, lines, cols, FALSE, NULL);
 115     add_widget (listbox->dlg, listbox->list);
 116
 117     return listbox;
 118 }
 119
 120 /* --------------------------------------------------------------------------------------------- */
 121
 122 Listbox *
 123 create_listbox_window (int lines, int cols, const char *title, const char *help)
 124 {
 125     return create_listbox_window_centered (-1, -1, lines, cols, title, help);
 126 }
 127
 128 /* --------------------------------------------------------------------------------------------- */
 129
 130 /** Returns the number of the item selected */
 131 int
 132 run_listbox (Listbox * l)
 133 {
 134     int val = -1;
 135
 136     if (run_dlg (l->dlg) != B_CANCEL)
 137         val = l->list->pos;
 138     destroy_dlg (l->dlg);
 139     g_free (l);
 140     return val;
 141 }
 142
 143 /* --------------------------------------------------------------------------------------------- */