576 lines
15 KiB
C
576 lines
15 KiB
C
/*
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* $Id: checklist.c,v 1.83 2004/12/20 20:42:58 tom Exp $
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*
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* checklist.c -- implements the checklist box
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*
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* AUTHOR: 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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* Thomas E. Dickey - rewrote...
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "dialog.h"
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static int list_width, check_x, item_x, checkflag;
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#define LLEN(n) ((n) * CHECKBOX_TAGS)
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#define ItemData(i) &items[LLEN(i)]
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#define ItemName(i) items[LLEN(i)]
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#define ItemText(i) items[LLEN(i) + 1]
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#define ItemStatus(i) items[LLEN(i) + 2]
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#define ItemHelp(i) items[LLEN(i) + 3]
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static void
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print_arrows(WINDOW *win,
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int box_x,
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int box_y,
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int scrollamt,
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int choice,
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int item_no,
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int list_height)
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{
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dlg_draw_arrows2(win, scrollamt,
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scrollamt + choice < item_no - 1,
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box_x + check_x + 5,
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box_y,
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box_y + list_height + 1,
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menubox_attr,
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menubox_border_attr);
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}
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/*
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* Print list item
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*/
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static void
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print_item(WINDOW *win, char **items, int status,
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int choice, int selected)
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{
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chtype save = getattrs(win);
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int i;
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chtype attr = A_NORMAL;
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const int *indx;
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int limit;
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/* Clear 'residue' of last item */
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wattrset(win, menubox_attr);
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(void) wmove(win, choice, 0);
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for (i = 0; i < list_width; i++)
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(void) waddch(win, ' ');
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(void) wmove(win, choice, check_x);
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wattrset(win, selected ? check_selected_attr : check_attr);
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(void) wprintw(win,
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(checkflag == FLAG_CHECK) ? "[%c]" : "(%c)",
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status ? 'X' : ' ');
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wattrset(win, menubox_attr);
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(void) waddch(win, ' ');
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if (strlen(ItemName(0)) != 0) {
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indx = dlg_index_wchars(ItemName(0));
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limit = dlg_count_wchars(ItemName(0));
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wattrset(win, selected ? tag_key_selected_attr : tag_key_attr);
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(void) waddnstr(win, ItemName(0), indx[1]);
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if ((int) strlen(ItemName(0)) > indx[1]) {
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limit = dlg_limit_columns(ItemName(0), (item_x - check_x - 6), 1);
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if (limit > 1) {
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wattrset(win, selected ? tag_selected_attr : tag_attr);
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(void) waddnstr(win,
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ItemName(0) + indx[1],
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indx[limit] - indx[1]);
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}
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}
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}
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if (strlen(ItemText(0)) != 0) {
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indx = dlg_index_wchars(ItemText(0));
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limit = dlg_limit_columns(ItemText(0), (getmaxx(win) - item_x - 1), 0);
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if (limit > 0) {
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(void) wmove(win, choice, item_x);
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wattrset(win, selected ? item_selected_attr : item_attr);
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dlg_print_text(win, ItemText(0), indx[limit], &attr);
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}
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}
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if (selected) {
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dlg_item_help(ItemHelp(0));
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}
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wattrset(win, save);
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}
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/*
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* Display a dialog box with a list of options that can be turned on or off
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* The `flag' parameter is used to select between radiolist and checklist.
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*/
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int
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dialog_checklist(const char *title, const char *cprompt, int height, int width,
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int list_height, int item_no, char **items, int flag)
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{
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bool show_status = FALSE;
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bool separate_output = ((flag == FLAG_CHECK)
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&& (dialog_vars.separate_output));
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int i, j, key2, found, x, y, cur_x, cur_y, box_x, box_y;
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int key = 0, fkey;
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int button = dialog_state.visit_items ? -1 : dlg_defaultno_button();
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int choice = dlg_default_item(items, CHECKBOX_TAGS);
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int scrollamt = 0;
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int max_choice, *status;
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int use_width, name_width, text_width;
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int result = DLG_EXIT_UNKNOWN;
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WINDOW *dialog, *list;
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char *prompt = dlg_strclone(cprompt);
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const char **buttons = dlg_ok_labels();
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dlg_tab_correct_str(prompt);
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if (list_height == 0) {
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use_width = dlg_calc_listw(item_no, items, CHECKBOX_TAGS) + 10;
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/* calculate height without items (4) */
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dlg_auto_size(title, prompt, &height, &width, 4, MAX(26, use_width));
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dlg_calc_listh(&height, &list_height, item_no);
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} else {
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dlg_auto_size(title, prompt, &height, &width, 4 + list_height, 26);
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}
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dlg_print_size(height, width);
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dlg_ctl_size(height, width);
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checkflag = flag;
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/* Allocate space for storing item on/off status */
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status = malloc(sizeof(int) * item_no);
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assert_ptr(status, "dialog_checklist");
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/* Initializes status */
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for (i = 0; i < item_no; i++)
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status[i] = !dlg_strcmp(ItemStatus(i), "on");
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max_choice = MIN(list_height, item_no);
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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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dlg_mouse_setbase(x, y);
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dlg_draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
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dlg_draw_bottom_box(dialog);
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dlg_draw_title(dialog, title);
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wattrset(dialog, dialog_attr);
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dlg_print_autowrap(dialog, prompt, height, width);
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list_width = width - 6;
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getyx(dialog, cur_y, cur_x);
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box_y = cur_y + 1;
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box_x = (width - list_width) / 2 - 1;
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/* create new window for the list */
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list = dlg_sub_window(dialog, list_height, list_width,
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y + box_y + 1, x + box_x + 1);
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/* draw a box around the list items */
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dlg_draw_box(dialog, box_y, box_x,
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list_height + 2 * MARGIN,
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list_width + 2 * MARGIN,
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menubox_border_attr, menubox_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, (int) strlen(ItemText(i)));
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name_width = MAX(name_width, (int) strlen(ItemName(i)));
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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 = (list_width - 6);
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if (text_width + name_width > use_width) {
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int need = 0.25 * use_width;
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if (name_width > need) {
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int want = use_width * ((double) name_width) / (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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check_x = (use_width - (text_width + name_width)) / 2;
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item_x = name_width + check_x + 6;
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/* Print the list */
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if (choice >= (max_choice + scrollamt)) {
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scrollamt = choice - max_choice + 1;
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choice = max_choice - 1;
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}
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for (i = 0; i < max_choice; i++)
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print_item(list,
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ItemData(i + scrollamt),
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status[i + scrollamt], i, i == choice);
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(void) wnoutrefresh(list);
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/* register the new window, along with its borders */
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dlg_mouse_mkbigregion(box_y + 1, box_x, list_height, list_width + 2,
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KEY_MAX, 1, 1, 1 /* by lines */ );
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print_arrows(dialog,
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box_x, box_y,
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scrollamt, choice, item_no, list_height);
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dlg_draw_buttons(dialog, height - 2, 0, buttons, button, FALSE, width);
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while (result == DLG_EXIT_UNKNOWN) {
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if (button < 0) /* --visit-items */
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wmove(dialog, box_y + choice + 1, box_x + check_x + 2);
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key = dlg_mouse_wgetch(dialog, &fkey);
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if (fkey && (key >= (M_EVENT + KEY_MAX))) {
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getyx(dialog, cur_y, cur_x);
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i = (key - (M_EVENT + KEY_MAX));
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if (scrollamt + i < max_choice) {
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/* De-highlight current item */
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print_item(list,
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ItemData(scrollamt + choice),
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status[scrollamt + choice], choice, FALSE);
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/* Highlight new item */
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choice = (key - (M_EVENT + KEY_MAX));
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print_item(list,
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ItemData(scrollamt + choice),
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status[scrollamt + choice], choice, TRUE);
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(void) wnoutrefresh(list);
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(void) wmove(dialog, cur_y, cur_x);
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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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}
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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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getyx(dialog, cur_y, cur_x);
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if (flag == FLAG_CHECK) { /* checklist? */
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status[scrollamt + choice] = !status[scrollamt + choice];
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print_item(list,
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ItemData(scrollamt + choice),
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status[scrollamt + choice], choice, TRUE);
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} else { /* radiolist */
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if (!status[scrollamt + choice]) {
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for (i = 0; i < item_no; i++)
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status[i] = FALSE;
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status[scrollamt + choice] = TRUE;
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for (i = 0; i < max_choice; i++)
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print_item(list,
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ItemData(scrollamt + i),
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status[scrollamt + i], i, i == choice);
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}
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}
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(void) wnoutrefresh(list);
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(void) wmove(dialog, cur_y, cur_x);
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wrefresh(dialog);
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continue; /* wait for another key press */
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} else if (key == ESC) {
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result = DLG_EXIT_ESC;
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continue;
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}
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if (!fkey) {
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fkey = TRUE;
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switch (key) {
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case '\n':
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case '\r':
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key = KEY_ENTER;
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break;
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case '-':
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key = KEY_UP;
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break;
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case '+':
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key = KEY_DOWN;
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break;
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case TAB:
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key = KEY_RIGHT;
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break;
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default:
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fkey = FALSE;
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break;
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}
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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 (dlg_match_char(dlg_last_getc(), ItemName(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 (dlg_match_char(dlg_last_getc(), ItemName(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 KEY_HOME:
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i = -scrollamt;
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break;
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case KEY_LL:
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case KEY_END:
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i = item_no - 1 - scrollamt;
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break;
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case M_EVENT + KEY_PPAGE:
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case KEY_PPAGE:
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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);
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else
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continue;
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break;
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case M_EVENT + KEY_NPAGE:
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case KEY_NPAGE:
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i = MIN(choice + max_choice, item_no - scrollamt - 1);
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break;
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case KEY_UP:
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i = choice - 1;
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if (choice == 0 && scrollamt == 0)
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continue;
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break;
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case KEY_DOWN:
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i = choice + 1;
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if (scrollamt + choice >= item_no - 1)
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continue;
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break;
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default:
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found = FALSE;
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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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if (i != choice) {
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getyx(dialog, cur_y, cur_x);
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if (i < 0 || i >= max_choice) {
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#if defined(NCURSES_VERSION_MAJOR) && NCURSES_VERSION_MAJOR < 5
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/*
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* Using wscrl to assist ncurses scrolling is not needed
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* in version 5.x
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*/
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if (i == -1) {
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if (list_height > 1) {
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/* De-highlight current first item */
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print_item(list,
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ItemData(scrollamt),
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status[scrollamt], 0, FALSE);
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scrollok(list, TRUE);
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wscrl(list, -1);
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scrollok(list, FALSE);
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}
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scrollamt--;
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print_item(list,
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ItemData(scrollamt),
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status[scrollamt], 0, TRUE);
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} else if (i == max_choice) {
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if (list_height > 1) {
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/* De-highlight current last item before scrolling up */
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print_item(list,
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ItemData(scrollamt + max_choice - 1),
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status[scrollamt + max_choice - 1],
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max_choice - 1, FALSE);
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scrollok(list, TRUE);
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wscrl(list, 1);
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scrollok(list, FALSE);
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}
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scrollamt++;
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print_item(list,
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ItemData(scrollamt + max_choice - 1),
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status[scrollamt + max_choice - 1],
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max_choice - 1, TRUE);
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} else
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#endif
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{
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if (i < 0) {
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scrollamt += i;
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choice = 0;
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} else {
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choice = max_choice - 1;
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scrollamt += (i - max_choice + 1);
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}
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for (i = 0; i < max_choice; i++) {
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print_item(list,
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ItemData(scrollamt + i),
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status[scrollamt + i], i, i == choice);
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}
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}
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(void) wnoutrefresh(list);
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print_arrows(dialog,
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box_x, box_y,
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scrollamt, choice, item_no, list_height);
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} else {
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/* De-highlight current item */
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print_item(list,
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ItemData(scrollamt + choice),
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status[scrollamt + choice], choice, FALSE);
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/* Highlight new item */
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choice = i;
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print_item(list,
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ItemData(scrollamt + choice),
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status[scrollamt + choice], choice, TRUE);
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(void) wnoutrefresh(list);
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(void) wmove(dialog, cur_y, cur_x);
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wrefresh(dialog);
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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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if (fkey) {
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switch (key) {
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case KEY_ENTER:
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result = dlg_ok_buttoncode(button);
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break;
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case KEY_BTAB:
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case KEY_LEFT:
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button = dlg_prev_button(buttons, button);
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dlg_draw_buttons(dialog, height - 2, 0, buttons, button,
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FALSE, width);
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break;
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case KEY_RIGHT:
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button = dlg_next_button(buttons, button);
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dlg_draw_buttons(dialog, height - 2, 0, buttons, button,
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FALSE, width);
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break;
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default:
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if (key >= M_EVENT) {
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if ((key2 = dlg_ok_buttoncode(key - M_EVENT)) >= 0) {
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result = key2;
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break;
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}
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beep();
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}
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}
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} else {
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beep();
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}
|
|
}
|
|
|
|
dlg_del_window(dialog);
|
|
switch (result) {
|
|
case DLG_EXIT_OK: /* FALLTHRU */
|
|
case DLG_EXIT_EXTRA:
|
|
show_status = TRUE;
|
|
break;
|
|
case DLG_EXIT_HELP:
|
|
dlg_add_result("HELP ");
|
|
show_status = dialog_vars.help_status;
|
|
if (USE_ITEM_HELP(ItemHelp(scrollamt + choice))) {
|
|
if (show_status) {
|
|
if (separate_output) {
|
|
dlg_add_result(ItemHelp(scrollamt + choice));
|
|
dlg_add_result("\n");
|
|
} else {
|
|
dlg_add_quoted(ItemHelp(scrollamt + choice));
|
|
}
|
|
} else {
|
|
dlg_add_result(ItemHelp(scrollamt + choice));
|
|
}
|
|
result = DLG_EXIT_ITEM_HELP;
|
|
} else {
|
|
if (show_status) {
|
|
if (separate_output) {
|
|
dlg_add_result(ItemName(scrollamt + choice));
|
|
dlg_add_result("\n");
|
|
} else {
|
|
dlg_add_quoted(ItemName(scrollamt + choice));
|
|
}
|
|
} else {
|
|
dlg_add_result(ItemName(scrollamt + choice));
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (show_status) {
|
|
for (i = 0; i < item_no; i++) {
|
|
if (status[i]) {
|
|
if (separate_output) {
|
|
dlg_add_result(ItemName(i));
|
|
dlg_add_result("\n");
|
|
} else {
|
|
if (*(dialog_vars.input_result))
|
|
dlg_add_result(" ");
|
|
if (flag == FLAG_CHECK) {
|
|
dlg_add_quoted(ItemName(i));
|
|
} else {
|
|
dlg_add_result(ItemName(i));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
dlg_mouse_free_regions();
|
|
free(status);
|
|
free(prompt);
|
|
return result;
|
|
}
|