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febdb46880
Approved by: re (marius)
681 lines
18 KiB
C
681 lines
18 KiB
C
/*
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* $Id: checklist.c,v 1.153 2013/09/02 17:01:02 tom Exp $
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*
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* checklist.c -- implements the checklist box
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*
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* Copyright 2000-2012,2013 Thomas E. Dickey
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License, version 2.1
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this program; if not, write to
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* Free Software Foundation, Inc.
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* 51 Franklin St., Fifth Floor
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* Boston, MA 02110, USA.
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*
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* An earlier version of this program lists as authors:
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* Savio Lam (lam836@cs.cuhk.hk)
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* Stuart Herbert - S.Herbert@sheffield.ac.uk: radiolist extension
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* Alessandro Rubini - rubini@ipvvis.unipv.it: merged the two
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*/
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#include <dialog.h>
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#include <dlg_keys.h>
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#define MIN_HIGH (1 + (5 * MARGIN))
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typedef struct {
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/* the outer-window */
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WINDOW *dialog;
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int box_y;
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int box_x;
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int check_x;
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int item_x;
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int checkflag;
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int use_height;
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int use_width;
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/* the inner-window */
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WINDOW *list;
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DIALOG_LISTITEM *items;
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int item_no;
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const char *states;
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} ALL_DATA;
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/*
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* Print list item. The 'selected' parameter is true if 'choice' is the
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* current item. That one is colored differently from the other items.
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*/
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static void
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print_item(ALL_DATA * data,
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WINDOW *win,
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DIALOG_LISTITEM * item,
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const char *states,
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int choice,
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int selected)
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{
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chtype save = dlg_get_attrs(win);
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int i;
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bool both = (!dialog_vars.no_tags && !dialog_vars.no_items);
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bool first = TRUE;
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int climit = (getmaxx(win) - data->check_x + 1);
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const char *show = (dialog_vars.no_items
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? item->name
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: item->text);
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/* Clear 'residue' of last item */
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(void) wattrset(win, menubox_attr);
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(void) wmove(win, choice, 0);
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for (i = 0; i < data->use_width; i++)
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(void) waddch(win, ' ');
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(void) wmove(win, choice, data->check_x);
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(void) wattrset(win, selected ? check_selected_attr : check_attr);
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(void) wprintw(win,
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(data->checkflag == FLAG_CHECK) ? "[%c]" : "(%c)",
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states[item->state]);
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(void) wattrset(win, menubox_attr);
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(void) waddch(win, ' ');
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if (both) {
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dlg_print_listitem(win, item->name, climit, first, selected);
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first = FALSE;
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}
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(void) wmove(win, choice, data->item_x);
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dlg_print_listitem(win, show, climit, first, selected);
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if (selected) {
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dlg_item_help(item->help);
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}
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(void) wattrset(win, save);
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}
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static void
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print_list(ALL_DATA * data, int choice, int scrollamt, int max_choice)
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{
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int i;
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int cur_y, cur_x;
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getyx(data->dialog, cur_y, cur_x);
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for (i = 0; i < max_choice; i++) {
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print_item(data,
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data->list,
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&data->items[i + scrollamt],
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data->states,
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i, i == choice);
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}
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(void) wnoutrefresh(data->list);
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dlg_draw_scrollbar(data->dialog,
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(long) (scrollamt),
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(long) (scrollamt),
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(long) (scrollamt + max_choice),
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(long) (data->item_no),
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data->box_x + data->check_x,
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data->box_x + data->use_width,
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data->box_y,
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data->box_y + data->use_height + 1,
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menubox_border2_attr,
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menubox_border_attr);
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(void) wmove(data->dialog, cur_y, cur_x);
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}
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static bool
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check_hotkey(DIALOG_LISTITEM * items, int choice)
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{
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bool result = FALSE;
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if (dlg_match_char(dlg_last_getc(),
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(dialog_vars.no_tags
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? items[choice].text
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: items[choice].name))) {
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result = TRUE;
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}
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return result;
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}
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/*
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* This is an alternate interface to 'checklist' which allows the application
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* to read the list item states back directly without putting them in the
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* output buffer. It also provides for more than two states over which the
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* check/radio box can display.
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*/
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int
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dlg_checklist(const char *title,
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const char *cprompt,
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int height,
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int width,
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int list_height,
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int item_no,
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DIALOG_LISTITEM * items,
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const char *states,
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int flag,
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int *current_item)
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{
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/* *INDENT-OFF* */
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static DLG_KEYS_BINDING binding[] = {
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HELPKEY_BINDINGS,
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ENTERKEY_BINDINGS,
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DLG_KEYS_DATA( DLGK_FIELD_NEXT, KEY_RIGHT ),
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DLG_KEYS_DATA( DLGK_FIELD_NEXT, TAB ),
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DLG_KEYS_DATA( DLGK_FIELD_PREV, KEY_BTAB ),
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DLG_KEYS_DATA( DLGK_FIELD_PREV, KEY_LEFT ),
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DLG_KEYS_DATA( DLGK_ITEM_FIRST, KEY_HOME ),
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DLG_KEYS_DATA( DLGK_ITEM_LAST, KEY_END ),
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DLG_KEYS_DATA( DLGK_ITEM_LAST, KEY_LL ),
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DLG_KEYS_DATA( DLGK_ITEM_NEXT, '+' ),
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DLG_KEYS_DATA( DLGK_ITEM_NEXT, KEY_DOWN ),
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DLG_KEYS_DATA( DLGK_ITEM_NEXT, CHR_NEXT ),
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DLG_KEYS_DATA( DLGK_ITEM_PREV, '-' ),
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DLG_KEYS_DATA( DLGK_ITEM_PREV, KEY_UP ),
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DLG_KEYS_DATA( DLGK_ITEM_PREV, CHR_PREVIOUS ),
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DLG_KEYS_DATA( DLGK_PAGE_NEXT, KEY_NPAGE ),
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DLG_KEYS_DATA( DLGK_PAGE_NEXT, DLGK_MOUSE(KEY_NPAGE) ),
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DLG_KEYS_DATA( DLGK_PAGE_PREV, KEY_PPAGE ),
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DLG_KEYS_DATA( DLGK_PAGE_PREV, DLGK_MOUSE(KEY_PPAGE) ),
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END_KEYS_BINDING
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};
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/* *INDENT-ON* */
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#ifdef KEY_RESIZE
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int old_height = height;
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int old_width = width;
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#endif
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ALL_DATA all;
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int i, j, key2, found, x, y, cur_x, cur_y;
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int key = 0, fkey;
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int button = dialog_state.visit_items ? -1 : dlg_default_button();
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int choice = dlg_default_listitem(items);
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int scrollamt = 0;
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int max_choice;
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int was_mouse;
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int use_width, list_width, name_width, text_width;
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int result = DLG_EXIT_UNKNOWN;
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int num_states;
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WINDOW *dialog;
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char *prompt = dlg_strclone(cprompt);
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const char **buttons = dlg_ok_labels();
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const char *widget_name;
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memset(&all, 0, sizeof(all));
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all.items = items;
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all.item_no = item_no;
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dlg_does_output();
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dlg_tab_correct_str(prompt);
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/*
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* If this is a radiobutton list, ensure that no more than one item is
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* selected initially. Allow none to be selected, since some users may
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* wish to provide this flavor.
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*/
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if (flag == FLAG_RADIO) {
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bool first = TRUE;
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for (i = 0; i < item_no; i++) {
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if (items[i].state) {
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if (first) {
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first = FALSE;
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} else {
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items[i].state = 0;
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}
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}
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}
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widget_name = "radiolist";
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} else {
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widget_name = "checklist";
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}
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#ifdef KEY_RESIZE
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retry:
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#endif
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all.use_height = list_height;
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use_width = dlg_calc_list_width(item_no, items) + 10;
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use_width = MAX(26, use_width);
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if (all.use_height == 0) {
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/* calculate height without items (4) */
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dlg_auto_size(title, prompt, &height, &width, MIN_HIGH, use_width);
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dlg_calc_listh(&height, &all.use_height, item_no);
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} else {
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dlg_auto_size(title, prompt,
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&height, &width,
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MIN_HIGH + all.use_height, use_width);
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}
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dlg_button_layout(buttons, &width);
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dlg_print_size(height, width);
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dlg_ctl_size(height, width);
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/* we need at least two states */
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if (states == 0 || strlen(states) < 2)
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states = " *";
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num_states = (int) strlen(states);
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all.states = states;
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all.checkflag = flag;
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x = dlg_box_x_ordinate(width);
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y = dlg_box_y_ordinate(height);
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dialog = dlg_new_window(height, width, y, x);
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all.dialog = dialog;
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dlg_register_window(dialog, widget_name, binding);
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dlg_register_buttons(dialog, widget_name, buttons);
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dlg_mouse_setbase(x, y);
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dlg_draw_box2(dialog, 0, 0, height, width, dialog_attr, border_attr, border2_attr);
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dlg_draw_bottom_box2(dialog, border_attr, border2_attr, dialog_attr);
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dlg_draw_title(dialog, title);
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(void) wattrset(dialog, dialog_attr);
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dlg_print_autowrap(dialog, prompt, height, width);
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all.use_width = width - 6;
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getyx(dialog, cur_y, cur_x);
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all.box_y = cur_y + 1;
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all.box_x = (width - all.use_width) / 2 - 1;
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/*
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* After displaying the prompt, we know how much space we really have.
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* Limit the list to avoid overwriting the ok-button.
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*/
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if (all.use_height + MIN_HIGH > height - cur_y)
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all.use_height = height - MIN_HIGH - cur_y;
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if (all.use_height <= 0)
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all.use_height = 1;
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max_choice = MIN(all.use_height, item_no);
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max_choice = MAX(max_choice, 1);
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/* create new window for the list */
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all.list = dlg_sub_window(dialog, all.use_height, all.use_width,
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y + all.box_y + 1, x + all.box_x + 1);
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/* draw a box around the list items */
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dlg_draw_box(dialog, all.box_y, all.box_x,
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all.use_height + 2 * MARGIN,
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all.use_width + 2 * MARGIN,
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menubox_border_attr, menubox_border2_attr);
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text_width = 0;
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name_width = 0;
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/* Find length of longest item to center checklist */
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for (i = 0; i < item_no; i++) {
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text_width = MAX(text_width, dlg_count_columns(items[i].text));
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name_width = MAX(name_width, dlg_count_columns(items[i].name));
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}
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/* If the name+text is wider than the list is allowed, then truncate
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* one or both of them. If the name is no wider than 1/4 of the list,
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* leave it intact.
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*/
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use_width = (all.use_width - 6);
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if (dialog_vars.no_tags) {
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list_width = MIN(all.use_width, text_width);
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} else if (dialog_vars.no_items) {
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list_width = MIN(all.use_width, name_width);
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} else {
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if (text_width >= 0
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&& name_width >= 0
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&& use_width > 0
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&& text_width + name_width > use_width) {
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int need = (int) (0.25 * use_width);
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if (name_width > need) {
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int want = (int) (use_width * ((double) name_width) /
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(text_width + name_width));
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name_width = (want > need) ? want : need;
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}
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text_width = use_width - name_width;
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}
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list_width = (text_width + name_width);
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}
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all.check_x = (use_width - list_width) / 2;
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all.item_x = ((dialog_vars.no_tags
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? 0
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: (dialog_vars.no_items
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? 0
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: (2 + name_width)))
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+ all.check_x + 4);
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/* ensure we are scrolled to show the current choice */
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scrollamt = MIN(scrollamt, max_choice + item_no - 1);
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if (choice >= (max_choice + scrollamt - 1)) {
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scrollamt = MAX(0, choice - max_choice + 1);
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choice = max_choice - 1;
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}
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print_list(&all, choice, scrollamt, max_choice);
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/* register the new window, along with its borders */
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dlg_mouse_mkbigregion(all.box_y + 1, all.box_x,
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all.use_height, all.use_width + 2,
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KEY_MAX, 1, 1, 1 /* by lines */ );
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dlg_draw_buttons(dialog, height - 2, 0, buttons, button, FALSE, width);
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dlg_trace_win(dialog);
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while (result == DLG_EXIT_UNKNOWN) {
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if (button < 0) /* --visit-items */
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wmove(dialog, all.box_y + choice + 1, all.box_x + all.check_x + 2);
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key = dlg_mouse_wgetch(dialog, &fkey);
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if (dlg_result_key(key, fkey, &result))
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break;
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was_mouse = (fkey && is_DLGK_MOUSE(key));
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if (was_mouse)
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key -= M_EVENT;
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if (was_mouse && (key >= KEY_MAX)) {
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getyx(dialog, cur_y, cur_x);
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i = (key - KEY_MAX);
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if (i < max_choice) {
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choice = (key - KEY_MAX);
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print_list(&all, choice, scrollamt, max_choice);
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key = ' '; /* force the selected item to toggle */
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} else {
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beep();
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continue;
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}
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fkey = FALSE;
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} else if (was_mouse && key >= KEY_MIN) {
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key = dlg_lookup_key(dialog, key, &fkey);
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}
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/*
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* A space toggles the item status. We handle either a checklist
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* (any number of items can be selected) or radio list (zero or one
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* items can be selected).
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*/
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if (key == ' ') {
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int current = scrollamt + choice;
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int next = items[current].state + 1;
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if (next >= num_states)
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next = 0;
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if (flag == FLAG_CHECK) { /* checklist? */
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getyx(dialog, cur_y, cur_x);
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items[current].state = next;
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print_item(&all, all.list,
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&items[scrollamt + choice],
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states,
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choice, TRUE);
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(void) wnoutrefresh(all.list);
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(void) wmove(dialog, cur_y, cur_x);
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} else { /* radiolist */
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for (i = 0; i < item_no; i++) {
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if (i != current) {
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items[i].state = 0;
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}
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}
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if (items[current].state) {
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getyx(dialog, cur_y, cur_x);
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items[current].state = next ? next : 1;
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print_item(&all, all.list,
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&items[current],
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states,
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choice, TRUE);
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(void) wnoutrefresh(all.list);
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(void) wmove(dialog, cur_y, cur_x);
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} else {
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items[current].state = 1;
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print_list(&all, choice, scrollamt, max_choice);
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}
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}
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continue; /* wait for another key press */
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}
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/*
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* Check if key pressed matches first character of any item tag in
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* list. If there is more than one match, we will cycle through
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* each one as the same key is pressed repeatedly.
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*/
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found = FALSE;
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if (!fkey) {
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if (button < 0 || !dialog_state.visit_items) {
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for (j = scrollamt + choice + 1; j < item_no; j++) {
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if (check_hotkey(items, j)) {
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found = TRUE;
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i = j - scrollamt;
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break;
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}
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}
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if (!found) {
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for (j = 0; j <= scrollamt + choice; j++) {
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if (check_hotkey(items, j)) {
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found = TRUE;
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i = j - scrollamt;
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break;
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}
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}
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}
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if (found)
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dlg_flush_getc();
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} else if ((j = dlg_char_to_button(key, buttons)) >= 0) {
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button = j;
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ungetch('\n');
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continue;
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}
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}
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/*
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* A single digit (1-9) positions the selection to that line in the
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* current screen.
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*/
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if (!found
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&& (key <= '9')
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&& (key > '0')
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&& (key - '1' < max_choice)) {
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found = TRUE;
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i = key - '1';
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}
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if (!found) {
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if (fkey) {
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found = TRUE;
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switch (key) {
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case DLGK_ITEM_FIRST:
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i = -scrollamt;
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break;
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case DLGK_ITEM_LAST:
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i = item_no - 1 - scrollamt;
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break;
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case DLGK_PAGE_PREV:
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if (choice)
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i = 0;
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else if (scrollamt != 0)
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i = -MIN(scrollamt, max_choice);
|
|
else
|
|
continue;
|
|
break;
|
|
case DLGK_PAGE_NEXT:
|
|
i = MIN(choice + max_choice, item_no - scrollamt - 1);
|
|
break;
|
|
case DLGK_ITEM_PREV:
|
|
i = choice - 1;
|
|
if (choice == 0 && scrollamt == 0)
|
|
continue;
|
|
break;
|
|
case DLGK_ITEM_NEXT:
|
|
i = choice + 1;
|
|
if (scrollamt + choice >= item_no - 1)
|
|
continue;
|
|
break;
|
|
default:
|
|
found = FALSE;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (found) {
|
|
if (i != choice) {
|
|
getyx(dialog, cur_y, cur_x);
|
|
if (i < 0 || i >= max_choice) {
|
|
if (i < 0) {
|
|
scrollamt += i;
|
|
choice = 0;
|
|
} else {
|
|
choice = max_choice - 1;
|
|
scrollamt += (i - max_choice + 1);
|
|
}
|
|
print_list(&all, choice, scrollamt, max_choice);
|
|
} else {
|
|
choice = i;
|
|
print_list(&all, choice, scrollamt, max_choice);
|
|
}
|
|
}
|
|
continue; /* wait for another key press */
|
|
}
|
|
|
|
if (fkey) {
|
|
switch (key) {
|
|
case DLGK_ENTER:
|
|
result = dlg_enter_buttoncode(button);
|
|
break;
|
|
case DLGK_FIELD_PREV:
|
|
button = dlg_prev_button(buttons, button);
|
|
dlg_draw_buttons(dialog, height - 2, 0, buttons, button,
|
|
FALSE, width);
|
|
break;
|
|
case DLGK_FIELD_NEXT:
|
|
button = dlg_next_button(buttons, button);
|
|
dlg_draw_buttons(dialog, height - 2, 0, buttons, button,
|
|
FALSE, width);
|
|
break;
|
|
#ifdef KEY_RESIZE
|
|
case KEY_RESIZE:
|
|
/* reset data */
|
|
height = old_height;
|
|
width = old_width;
|
|
/* repaint */
|
|
dlg_clear();
|
|
dlg_del_window(dialog);
|
|
refresh();
|
|
dlg_mouse_free_regions();
|
|
goto retry;
|
|
#endif
|
|
default:
|
|
if (was_mouse) {
|
|
if ((key2 = dlg_ok_buttoncode(key)) >= 0) {
|
|
result = key2;
|
|
break;
|
|
}
|
|
beep();
|
|
}
|
|
}
|
|
} else {
|
|
beep();
|
|
}
|
|
}
|
|
|
|
dlg_del_window(dialog);
|
|
dlg_mouse_free_regions();
|
|
free(prompt);
|
|
*current_item = (scrollamt + choice);
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* Display a dialog box with a list of options that can be turned on or off
|
|
* The `flag' parameter is used to select between radiolist and checklist.
|
|
*/
|
|
int
|
|
dialog_checklist(const char *title,
|
|
const char *cprompt,
|
|
int height,
|
|
int width,
|
|
int list_height,
|
|
int item_no,
|
|
char **items,
|
|
int flag)
|
|
{
|
|
int result;
|
|
int i, j;
|
|
DIALOG_LISTITEM *listitems;
|
|
bool separate_output = ((flag == FLAG_CHECK)
|
|
&& (dialog_vars.separate_output));
|
|
bool show_status = FALSE;
|
|
int current = 0;
|
|
char *help_result;
|
|
|
|
listitems = dlg_calloc(DIALOG_LISTITEM, (size_t) item_no + 1);
|
|
assert_ptr(listitems, "dialog_checklist");
|
|
|
|
for (i = j = 0; i < item_no; ++i) {
|
|
listitems[i].name = items[j++];
|
|
listitems[i].text = (dialog_vars.no_items
|
|
? dlg_strempty()
|
|
: items[j++]);
|
|
listitems[i].state = !dlg_strcmp(items[j++], "on");
|
|
listitems[i].help = ((dialog_vars.item_help)
|
|
? items[j++]
|
|
: dlg_strempty());
|
|
}
|
|
dlg_align_columns(&listitems[0].text, (int) sizeof(DIALOG_LISTITEM), item_no);
|
|
|
|
result = dlg_checklist(title,
|
|
cprompt,
|
|
height,
|
|
width,
|
|
list_height,
|
|
item_no,
|
|
listitems,
|
|
NULL,
|
|
flag,
|
|
¤t);
|
|
|
|
switch (result) {
|
|
case DLG_EXIT_OK: /* FALLTHRU */
|
|
case DLG_EXIT_EXTRA:
|
|
show_status = TRUE;
|
|
break;
|
|
case DLG_EXIT_HELP:
|
|
dlg_add_help_listitem(&result, &help_result, &listitems[current]);
|
|
if ((show_status = dialog_vars.help_status)) {
|
|
if (separate_output) {
|
|
dlg_add_string(help_result);
|
|
dlg_add_separator();
|
|
} else {
|
|
dlg_add_quoted(help_result);
|
|
}
|
|
} else {
|
|
dlg_add_string(help_result);
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (show_status) {
|
|
for (i = 0; i < item_no; i++) {
|
|
if (listitems[i].state) {
|
|
if (separate_output) {
|
|
dlg_add_string(listitems[i].name);
|
|
dlg_add_separator();
|
|
} else {
|
|
if (dlg_need_separator())
|
|
dlg_add_separator();
|
|
if (flag == FLAG_CHECK)
|
|
dlg_add_quoted(listitems[i].name);
|
|
else
|
|
dlg_add_string(listitems[i].name);
|
|
}
|
|
}
|
|
}
|
|
dlg_add_last_key(separate_output);
|
|
}
|
|
|
|
dlg_free_columns(&listitems[0].text, (int) sizeof(DIALOG_LISTITEM), item_no);
|
|
free(listitems);
|
|
return result;
|
|
}
|