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Diffstat (limited to 'lib/widget/listbox-window.c')
| -rw-r--r-- | lib/widget/listbox-window.c | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/lib/widget/listbox-window.c b/lib/widget/listbox-window.c new file mode 100644 index 0000000..42551c4 --- /dev/null +++ b/lib/widget/listbox-window.c @@ -0,0 +1,175 @@ +/* + Widget based utility functions. + + Copyright (C) 1994-2022 + 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 = 0, ypos = 0; + Listbox *listbox; + widget_pos_flags_t pos_flags = WPOS_TRYUP; + + /* 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)) + pos_flags |= WPOS_CENTER; + else + { + /* Actually, this this is not used in MC. */ + + 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, pos_flags, FALSE, listbox_colors, + NULL, NULL, help, title); + + listbox->list = listbox_new (2, 2, lines, cols, FALSE, NULL); + group_add_widget (GROUP (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; + widget_destroy (WIDGET (l->dlg)); + g_free (l); + return val; +} + +/* --------------------------------------------------------------------------------------------- */ + +/** + * A variant of run_listbox() which is more convenient to use when we + * need to select arbitrary 'data'. + * + * @param select the item to select initially, by its 'data'. Optional. + * @return the 'data' of the item selected, or NULL if none selected. + */ +void * +run_listbox_with_data (Listbox * l, const void *select) +{ + void *val = NULL; + + if (select != NULL) + listbox_select_entry (l->list, listbox_search_data (l->list, select)); + + if (dlg_run (l->dlg) != B_CANCEL) + { + WLEntry *e; + e = listbox_get_nth_item (l->list, l->list->pos); + if (e != NULL) + { + /* The assert guards against returning a soon-to-be deallocated + * pointer (as in listbox_add_item(..., TRUE)). */ + g_assert (!e->free_data); + val = e->data; + } + } + + widget_destroy (WIDGET (l->dlg)); + g_free (l); + return val; +} + +/* --------------------------------------------------------------------------------------------- */ |