420 lines
10 KiB
C
420 lines
10 KiB
C
/*
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* $Id: rangebox.c,v 1.17 2013/03/17 16:02:00 tom Exp $
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*
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* rangebox.c -- implements the rangebox dialog
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*
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* Copyright 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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#include <dialog.h>
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#include <dlg_keys.h>
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#define ONE_HIGH 1
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#define MIN_HIGH (ONE_HIGH + 1 + (4 * MARGIN))
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#define MIN_WIDE (10 + 2 + (2 * MARGIN))
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struct _box;
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typedef struct _box {
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WINDOW *parent;
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WINDOW *window;
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int x;
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int y;
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int width;
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int height;
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int period;
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int value;
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} BOX;
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typedef struct {
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/* window in which the value and slider are drawn */
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WINDOW *window;
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int min_value;
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int max_value;
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/* position and width of the numeric field */
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int value_x;
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int value_len;
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int value_col;
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/* position and width of the slider field */
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int slide_x;
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int slide_y;
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int slide_len;
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/* current value drawn */
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int current;
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/* value to add to make slider move by one cell */
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int slide_inc;
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} VALUE;
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static int
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digits_of(int value)
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{
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char temp[80];
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sprintf(temp, "%d", value);
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return (int) strlen(temp);
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}
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static int
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digit_of(VALUE * data)
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{
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int col = data->value_col;
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int result = 1;
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while (++col < data->value_len) {
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result *= 10;
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}
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return result;
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}
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static bool
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set_digit(VALUE * data, int chr)
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{
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bool result = FALSE;
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char buffer[80];
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long check;
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char *next = 0;
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sprintf(buffer, "%*d", data->value_len, data->current);
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buffer[data->value_col] = (char) chr;
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check = strtol(buffer, &next, 10);
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if (next == 0 || *next == '\0') {
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if ((check <= (long) data->max_value) &&
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(check >= (long) data->min_value)) {
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result = TRUE;
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data->current = (int) check;
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}
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}
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return result;
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}
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/*
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* This is similar to the gauge code, but differs in the way the number
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* is displayed, etc.
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*/
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static void
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draw_value(VALUE * data, int value)
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{
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if (value != data->current) {
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WINDOW *win = data->window;
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int y, x;
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int n;
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int ranges = (data->max_value + 1 - data->min_value);
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int offset = (value - data->min_value);
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int scaled;
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getyx(win, y, x);
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if (ranges > data->slide_len) {
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scaled = (offset + data->slide_inc) / data->slide_inc;
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} else if (ranges < data->slide_len) {
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scaled = (offset + 1) * data->slide_inc;
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} else {
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scaled = offset;
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}
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(void) wattrset(win, gauge_attr);
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wmove(win, data->slide_y, data->slide_x);
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for (n = 0; n < data->slide_len; ++n) {
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(void) waddch(win, ' ');
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}
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wmove(win, data->slide_y, data->value_x);
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wprintw(win, "%*d", data->value_len, value);
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if ((gauge_attr & A_REVERSE) != 0) {
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wattroff(win, A_REVERSE);
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} else {
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(void) wattrset(win, A_REVERSE);
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}
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wmove(win, data->slide_y, data->slide_x);
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for (n = 0; n < scaled; ++n) {
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chtype ch2 = winch(win);
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if (gauge_attr & A_REVERSE) {
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ch2 &= ~A_REVERSE;
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}
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(void) waddch(win, ch2);
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}
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(void) wattrset(win, dialog_attr);
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wmove(win, y, x);
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data->current = value;
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dlg_trace_msg("drew %d offset %d scaled %d limit %d inc %d\n",
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value,
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offset,
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scaled,
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data->slide_len,
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data->slide_inc);
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dlg_trace_win(win);
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}
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}
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/*
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* Allow the user to select from a range of values, e.g., using a slider.
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*/
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int
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dialog_rangebox(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 min_value,
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int max_value,
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int default_value)
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{
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/* *INDENT-OFF* */
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static DLG_KEYS_BINDING binding[] = {
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DLG_KEYS_DATA( DLGK_DELETE_RIGHT,KEY_DC ),
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HELPKEY_BINDINGS,
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ENTERKEY_BINDINGS,
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DLG_KEYS_DATA( DLGK_ENTER, ' ' ),
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DLG_KEYS_DATA( DLGK_FIELD_NEXT, CHR_NEXT ),
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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, CHR_BACKSPACE ),
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DLG_KEYS_DATA( DLGK_FIELD_PREV, CHR_PREVIOUS ),
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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_PREV, '-' ),
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DLG_KEYS_DATA( DLGK_ITEM_PREV, KEY_UP ),
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DLG_KEYS_DATA( DLGK_PAGE_NEXT, KEY_NEXT),
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DLG_KEYS_DATA( DLGK_PAGE_NEXT, KEY_NPAGE),
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DLG_KEYS_DATA( DLGK_PAGE_PREV, KEY_PPAGE ),
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DLG_KEYS_DATA( DLGK_PAGE_PREV, KEY_PREVIOUS ),
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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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VALUE data;
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int key = 0, key2, fkey;
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int button;
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int result = DLG_EXIT_UNKNOWN;
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WINDOW *dialog;
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int state = dlg_default_button();
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const char **buttons = dlg_ok_labels();
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char *prompt = dlg_strclone(cprompt);
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char buffer[MAX_LEN];
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int cur_value = default_value;
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int usable;
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int ranges;
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int yorg, xorg;
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if (max_value < min_value)
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max_value = min_value;
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if (cur_value > max_value)
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cur_value = max_value;
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if (cur_value < min_value)
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cur_value = min_value;
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dlg_does_output();
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#ifdef KEY_RESIZE
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retry:
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#endif
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dlg_auto_size(title, prompt, &height, &width, 0, 0);
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height += MIN_HIGH;
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if (width < MIN_WIDE)
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width = MIN_WIDE;
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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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dialog = dlg_new_window(height, width,
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yorg = dlg_box_y_ordinate(height),
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xorg = dlg_box_x_ordinate(width));
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data.window = dialog;
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data.min_value = min_value;
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data.max_value = max_value;
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usable = (width - 2 - 4 * MARGIN);
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ranges = max_value - min_value + 1;
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/*
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* Center the number after allowing for its maximum number of digits.
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*/
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data.value_len = digits_of(max_value);
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if (digits_of(min_value) > data.value_len)
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data.value_len = digits_of(min_value);
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data.value_x = (usable - data.value_len) / 2 + MARGIN;
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data.value_col = data.value_len - 1;
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/*
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* The slider is scaled, to try to use the width of the dialog.
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*/
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if (ranges > usable) {
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data.slide_inc = (ranges + usable - 1) / usable;
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data.slide_len = 1 + ranges / data.slide_inc;
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} else if (ranges < usable) {
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data.slide_inc = usable / ranges;
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data.slide_len = ranges * data.slide_inc;
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} else {
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data.slide_inc = 1;
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data.slide_len = usable;
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}
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data.slide_x = (usable - data.slide_len) / 2 + MARGIN + 2;
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data.slide_y = height - 5;
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data.current = cur_value - 1;
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dlg_register_window(dialog, "rangebox", binding);
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dlg_register_buttons(dialog, "rangebox", buttons);
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dlg_draw_box2(dialog, 0, 0, height, width, dialog_attr, border_attr, border2_attr);
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dlg_mouse_setbase(xorg, yorg);
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dlg_mouse_mkregion(data.slide_y - 1, data.slide_x - 1, 3, usable + 2, 'i');
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dlg_draw_box2(dialog,
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height - 6, data.slide_x - MARGIN,
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2 + MARGIN, data.slide_len + 2 * MARGIN,
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dialog_attr,
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border_attr,
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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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dlg_draw_helpline(dialog, FALSE);
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(void) wattrset(dialog, dialog_attr);
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dlg_print_autowrap(dialog, prompt, height, width);
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dlg_trace_win(dialog);
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while (result == DLG_EXIT_UNKNOWN) {
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draw_value(&data, cur_value);
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button = (state < 0) ? 0 : state;
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dlg_draw_buttons(dialog, height - 2, 0, buttons, button, FALSE, width);
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if (state < 0) {
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data.value_col = data.value_len + state;
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wmove(dialog, data.slide_y, data.value_x + data.value_col);
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}
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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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if ((key2 = dlg_char_to_button(key, buttons)) >= 0) {
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result = key2;
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} else {
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/* handle function-keys */
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if (fkey) {
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switch (key) {
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case DLGK_ENTER:
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result = dlg_ok_buttoncode(button);
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break;
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case DLGK_FIELD_PREV:
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if (state < 0 && state > -data.value_len) {
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--state;
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} else {
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state = dlg_prev_ok_buttonindex(state, -data.value_len);
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}
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break;
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case DLGK_FIELD_NEXT:
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if (state < 0) {
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++state;
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} else {
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state = dlg_next_ok_buttonindex(state, -data.value_len);
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}
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break;
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case DLGK_ITEM_FIRST:
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cur_value = min_value;
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break;
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case DLGK_ITEM_LAST:
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cur_value = max_value;
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break;
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case DLGK_ITEM_PREV:
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if (state < 0) {
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cur_value -= digit_of(&data);
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} else {
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cur_value -= 1;
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}
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if (cur_value < min_value)
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cur_value = min_value;
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break;
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case DLGK_ITEM_NEXT:
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if (state < 0) {
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cur_value += digit_of(&data);
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} else {
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cur_value += 1;
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}
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if (cur_value > max_value)
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cur_value = max_value;
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break;
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case DLGK_PAGE_PREV:
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cur_value -= data.slide_inc;
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if (cur_value < min_value)
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cur_value = min_value;
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break;
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case DLGK_PAGE_NEXT:
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cur_value += data.slide_inc;
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if (cur_value > max_value)
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cur_value = max_value;
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break;
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#ifdef KEY_RESIZE
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case KEY_RESIZE:
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/* reset data */
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height = old_height;
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width = old_width;
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/* repaint */
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dlg_clear();
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dlg_del_window(dialog);
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refresh();
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dlg_mouse_free_regions();
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goto retry;
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#endif
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case DLGK_MOUSE('i'):
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state = -data.value_len;
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break;
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default:
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if (is_DLGK_MOUSE(key)) {
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result = dlg_ok_buttoncode(key - M_EVENT);
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if (result < 0)
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result = DLG_EXIT_OK;
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}
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break;
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}
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} else if (isdigit(key) && state < 0) {
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if (set_digit(&data, key)) {
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cur_value = data.current;
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data.current--;
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}
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} else {
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beep();
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}
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}
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}
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sprintf(buffer, "%d", cur_value);
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dlg_add_result(buffer);
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dlg_add_separator();
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dlg_add_last_key(-1);
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dlg_del_window(dialog);
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dlg_mouse_free_regions();
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free(prompt);
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return result;
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}
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