/*
* $Id: rangebox.c,v 1.24 2018/06/19 22:57:01 tom Exp $
*
* rangebox.c -- implements the rangebox dialog
*
* Copyright 2012-2017,2018 Thomas E. Dickey
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License, version 2.1
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to
* Free Software Foundation, Inc.
* 51 Franklin St., Fifth Floor
* Boston, MA 02110, USA.
*/
#include <dialog.h>
#include <dlg_keys.h>
#define ONE_HIGH 1
#define MIN_HIGH (ONE_HIGH + 1 + (4 * MARGIN))
#define MIN_WIDE (10 + 2 + (2 * MARGIN))
struct _box;
typedef struct _box {
WINDOW *parent;
WINDOW *window;
int x;
int y;
int width;
int height;
int period;
int value;
} BOX;
typedef struct {
/* window in which the value and slider are drawn */
WINDOW *window;
int min_value;
int max_value;
/* position and width of the numeric field */
int value_x;
int value_len;
int value_col;
/* position and width of the slider field */
int slide_x;
int slide_y;
int slide_len;
/* current value drawn */
int current;
/* value to add to make slider move by one cell */
int slide_inc;
} VALUE;
static int
digits_of(int value)
{
char temp[80];
sprintf(temp, "%d", value);
return (int) strlen(temp);
}
static int
digit_of(VALUE * data)
{
int col = data->value_col;
int result = 1;
while (++col < data->value_len) {
result *= 10;
}
return result;
}
static bool
set_digit(VALUE * data, int chr)
{
bool result = FALSE;
char buffer[80];
long check;
char *next = 0;
sprintf(buffer, "%*d", data->value_len, data->current);
buffer[data->value_col] = (char) chr;
check = strtol(buffer, &next, 10);
if (next == 0 || *next == '\0') {
if ((check <= (long) data->max_value) &&
(check >= (long) data->min_value)) {
result = TRUE;
data->current = (int) check;
}
}
return result;
}
/*
* This is similar to the gauge code, but differs in the way the number
* is displayed, etc.
*/
static void
draw_value(VALUE * data, int value)
{
if (value != data->current) {
WINDOW *win = data->window;
int y, x;
int n;
int ranges = (data->max_value + 1 - data->min_value);
int offset = (value - data->min_value);
int scaled;
getyx(win, y, x);
if (ranges > data->slide_len) {
scaled = (offset + data->slide_inc) / data->slide_inc;
} else if (ranges < data->slide_len) {
scaled = (offset + 1) * data->slide_inc;
} else {
scaled = offset;
}
dlg_attrset(win, gauge_attr);
wmove(win, data->slide_y, data->slide_x);
for (n = 0; n < data->slide_len; ++n) {
(void) waddch(win, ' ');
}
wmove(win, data->slide_y, data->value_x);
wprintw(win, "%*d", data->value_len, value);
if ((gauge_attr & A_REVERSE) != 0) {
dlg_attroff(win, A_REVERSE);
} else {
dlg_attrset(win, A_REVERSE);
}
wmove(win, data->slide_y, data->slide_x);
for (n = 0; n < scaled; ++n) {
chtype ch2 = winch(win);
if (gauge_attr & A_REVERSE) {
ch2 &= ~A_REVERSE;
}
(void) waddch(win, ch2);
}
dlg_attrset(win, dialog_attr);
wmove(win, y, x);
data->current = value;
DLG_TRACE(("# drew %d offset %d scaled %d limit %d inc %d\n",
value,
offset,
scaled,
data->slide_len,
data->slide_inc));
dlg_trace_win(win);
}
}
/*
* Allow the user to select from a range of values, e.g., using a slider.
*/
int
dialog_rangebox(const char *title,
const char *cprompt,
int height,
int width,
int min_value,
int max_value,
int default_value)
{
/* *INDENT-OFF* */
static DLG_KEYS_BINDING binding[] = {
DLG_KEYS_DATA( DLGK_DELETE_RIGHT,KEY_DC ),
HELPKEY_BINDINGS,
ENTERKEY_BINDINGS,
TOGGLEKEY_BINDINGS,
DLG_KEYS_DATA( DLGK_FIELD_NEXT, CHR_NEXT ),
DLG_KEYS_DATA( DLGK_FIELD_NEXT, KEY_RIGHT ),
DLG_KEYS_DATA( DLGK_FIELD_NEXT, TAB ),
DLG_KEYS_DATA( DLGK_FIELD_PREV, CHR_BACKSPACE ),
DLG_KEYS_DATA( DLGK_FIELD_PREV, CHR_PREVIOUS ),
DLG_KEYS_DATA( DLGK_FIELD_PREV, KEY_BTAB ),
DLG_KEYS_DATA( DLGK_FIELD_PREV, KEY_LEFT ),
DLG_KEYS_DATA( DLGK_ITEM_FIRST, KEY_HOME),
DLG_KEYS_DATA( DLGK_ITEM_LAST, KEY_END),
DLG_KEYS_DATA( DLGK_ITEM_LAST, KEY_LL ),
DLG_KEYS_DATA( DLGK_ITEM_NEXT, '+'),
DLG_KEYS_DATA( DLGK_ITEM_NEXT, KEY_DOWN),
DLG_KEYS_DATA( DLGK_ITEM_PREV, '-' ),
DLG_KEYS_DATA( DLGK_ITEM_PREV, KEY_UP ),
DLG_KEYS_DATA( DLGK_PAGE_NEXT, KEY_NEXT),
DLG_KEYS_DATA( DLGK_PAGE_NEXT, KEY_NPAGE),
DLG_KEYS_DATA( DLGK_PAGE_PREV, KEY_PPAGE ),
DLG_KEYS_DATA( DLGK_PAGE_PREV, KEY_PREVIOUS ),
END_KEYS_BINDING
};
/* *INDENT-ON* */
#ifdef KEY_RESIZE
int old_height = height;
int old_width = width;
#endif
VALUE data;
int key = 0, key2, fkey;
int button;
int result = DLG_EXIT_UNKNOWN;
WINDOW *dialog;
int state = dlg_default_button();
const char **buttons = dlg_ok_labels();
char *prompt;
char buffer[MAX_LEN];
int cur_value = default_value;
int usable;
int ranges;
int yorg, xorg;
DLG_TRACE(("# tailbox args:\n"));
DLG_TRACE2S("title", title);
DLG_TRACE2S("message", cprompt);
DLG_TRACE2N("height", height);
DLG_TRACE2N("width", width);
DLG_TRACE2N("minval", min_value);
DLG_TRACE2N("maxval", max_value);
DLG_TRACE2N("default", default_value);
if (max_value < min_value)
max_value = min_value;
if (cur_value > max_value)
cur_value = max_value;
if (cur_value < min_value)
cur_value = min_value;
dlg_does_output();
#ifdef KEY_RESIZE
retry:
#endif
prompt = dlg_strclone(cprompt);
dlg_auto_size(title, prompt, &height, &width, 0, 0);
height += MIN_HIGH;
if (width < MIN_WIDE)
width = MIN_WIDE;
dlg_button_layout(buttons, &width);
dlg_print_size(height, width);
dlg_ctl_size(height, width);
dialog = dlg_new_window(height, width,
yorg = dlg_box_y_ordinate(height),
xorg = dlg_box_x_ordinate(width));
data.window = dialog;
data.min_value = min_value;
data.max_value = max_value;
usable = (width - 2 - 4 * MARGIN);
ranges = max_value - min_value + 1;
/*
* Center the number after allowing for its maximum number of digits.
*/
data.value_len = digits_of(max_value);
if (digits_of(min_value) > data.value_len)
data.value_len = digits_of(min_value);
data.value_x = (usable - data.value_len) / 2 + MARGIN;
data.value_col = data.value_len - 1;
/*
* The slider is scaled, to try to use the width of the dialog.
*/
if (ranges > usable) {
data.slide_inc = (ranges + usable - 1) / usable;
data.slide_len = 1 + ranges / data.slide_inc;
} else if (ranges < usable) {
data.slide_inc = usable / ranges;
data.slide_len = ranges * data.slide_inc;
} else {
data.slide_inc = 1;
data.slide_len = usable;
}
data.slide_x = (usable - data.slide_len) / 2 + MARGIN + 2;
data.slide_y = height - 5;
data.current = cur_value - 1;
dlg_register_window(dialog, "rangebox", binding);
dlg_register_buttons(dialog, "rangebox", buttons);
dlg_draw_box2(dialog, 0, 0, height, width, dialog_attr, border_attr, border2_attr);
dlg_mouse_setbase(xorg, yorg);
dlg_mouse_mkregion(data.slide_y - 1, data.slide_x - 1, 3, usable + 2, 'i');
dlg_draw_box2(dialog,
height - 6, data.slide_x - MARGIN,
2 + MARGIN, data.slide_len + 2 * MARGIN,
dialog_attr,
border_attr,
border2_attr);
dlg_draw_bottom_box2(dialog, border_attr, border2_attr, dialog_attr);
dlg_draw_title(dialog, title);
dlg_draw_helpline(dialog, FALSE);
dlg_attrset(dialog, dialog_attr);
dlg_print_autowrap(dialog, prompt, height, width);
dlg_trace_win(dialog);
while (result == DLG_EXIT_UNKNOWN) {
draw_value(&data, cur_value);
button = (state < 0) ? 0 : state;
dlg_draw_buttons(dialog, height - 2, 0, buttons, button, FALSE, width);
if (state < 0) {
data.value_col = data.value_len + state;
wmove(dialog, data.slide_y, data.value_x + data.value_col);
}
key = dlg_mouse_wgetch(dialog, &fkey);
if (dlg_result_key(key, fkey, &result))
break;
if ((key2 = dlg_char_to_button(key, buttons)) >= 0) {
result = key2;
} else {
/* handle function-keys */
if (fkey) {
switch (key) {
case DLGK_TOGGLE:
case DLGK_ENTER:
result = dlg_ok_buttoncode(button);
break;
case DLGK_FIELD_PREV:
if (state < 0 && state > -data.value_len) {
--state;
} else {
state = dlg_prev_ok_buttonindex(state, -data.value_len);
}
break;
case DLGK_FIELD_NEXT:
if (state < 0) {
++state;
} else {
state = dlg_next_ok_buttonindex(state, -data.value_len);
}
break;
case DLGK_ITEM_FIRST:
cur_value = min_value;
break;
case DLGK_ITEM_LAST:
cur_value = max_value;
break;
case DLGK_ITEM_PREV:
if (state < 0) {
cur_value -= digit_of(&data);
} else {
cur_value -= 1;
}
if (cur_value < min_value)
cur_value = min_value;
break;
case DLGK_ITEM_NEXT:
if (state < 0) {
cur_value += digit_of(&data);
} else {
cur_value += 1;
}
if (cur_value > max_value)
cur_value = max_value;
break;
case DLGK_PAGE_PREV:
cur_value -= data.slide_inc;
if (cur_value < min_value)
cur_value = min_value;
break;
case DLGK_PAGE_NEXT:
cur_value += data.slide_inc;
if (cur_value > max_value)
cur_value = max_value;
break;
#ifdef KEY_RESIZE
case KEY_RESIZE:
dlg_will_resize(dialog);
/* reset data */
height = old_height;
width = old_width;
/* repaint */
free(prompt);
dlg_clear();
dlg_del_window(dialog);
dlg_mouse_free_regions();
goto retry;
#endif
case DLGK_MOUSE('i'):
state = -data.value_len;
break;
default:
if (is_DLGK_MOUSE(key)) {
result = dlg_ok_buttoncode(key - M_EVENT);
if (result < 0)
result = DLG_EXIT_OK;
}
break;
}
} else if (isdigit(key) && state < 0) {
if (set_digit(&data, key)) {
cur_value = data.current;
data.current--;
}
} else {
beep();
}
}
}
sprintf(buffer, "%d", cur_value);
dlg_add_result(buffer);
dlg_add_separator();
dlg_add_last_key(-1);
dlg_del_window(dialog);
dlg_mouse_free_regions();
free(prompt);
return result;
}