282 lines
8.5 KiB
C
282 lines
8.5 KiB
C
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/*
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* inputbox.c -- implements the input box
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*
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* AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
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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.priv.h"
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#include <dialog.h>
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/*
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* Display a dialog box for inputing a string
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*/
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int dialog_inputbox(unsigned char *title, unsigned char *prompt, int height, int width, unsigned char *result)
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{
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int i, x, y, box_y, box_x, box_width,
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input_x = 0, scroll = 0, key = 0, button = -1;
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unsigned char instr[MAX_LEN+1];
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WINDOW *dialog;
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/* center dialog box on screen */
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x = (COLS - width)/2;
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y = (LINES - height)/2;
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memset(instr, 0, sizeof(instr));
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#ifdef HAVE_NCURSES
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if (use_shadow)
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draw_shadow(stdscr, y, x, height, width);
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#endif
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dialog = newwin(height, width, y, x);
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keypad(dialog, TRUE);
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draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
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wattrset(dialog, border_attr);
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wmove(dialog, height-3, 0);
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waddch(dialog, ACS_LTEE);
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for (i = 0; i < width-2; i++)
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waddch(dialog, ACS_HLINE);
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wattrset(dialog, dialog_attr);
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waddch(dialog, ACS_RTEE);
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wmove(dialog, height-2, 1);
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for (i = 0; i < width-2; i++)
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waddch(dialog, ' ');
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if (title != NULL) {
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wattrset(dialog, title_attr);
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wmove(dialog, 0, (width - strlen(title))/2 - 1);
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waddch(dialog, ' ');
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waddstr(dialog, title);
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waddch(dialog, ' ');
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}
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wattrset(dialog, dialog_attr);
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print_autowrap(dialog, prompt, width, 1, 3);
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/* Draw the input field box */
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box_width = width-6;
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getyx(dialog, y, x);
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box_y = y + 2;
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box_x = (width - box_width)/2;
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draw_box(dialog, y+1, box_x-1, 3, box_width+2, border_attr, dialog_attr);
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x = width/2-11;
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y = height-2;
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print_button(dialog, "Cancel", y, x+14, FALSE);
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print_button(dialog, " OK ", y, x, TRUE);
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wmove(dialog, box_y, box_x);
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wrefresh(dialog);
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while (key != ESC) {
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key = wgetch(dialog);
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if (button == -1) { /* Input box selected */
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switch (key) {
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case TAB:
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case KEY_BTAB:
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case KEY_UP:
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case KEY_DOWN:
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break;
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case KEY_HOME:
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input_x = scroll = 0;
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wmove(dialog, box_y, box_x);
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for (i = 0; i < box_width; i++)
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waddch(dialog, instr[i] ? instr[i] : ' ');
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wmove(dialog, box_y, box_x);
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wrefresh(dialog);
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continue;
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case KEY_END:
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for (i = strlen(instr) - 1; i >= scroll + input_x && instr[i] == ' '; i--)
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instr[i] = '\0';
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i++;
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input_x = i % box_width;
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scroll = i - input_x;
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wmove(dialog, box_y, box_x);
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for (i = 0; i < box_width; i++)
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waddch(dialog, instr[scroll+i] ? instr[scroll+i] : ' ');
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wmove(dialog, box_y, input_x + box_x);
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wrefresh(dialog);
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continue;
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case KEY_LEFT:
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if (input_x || scroll) {
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wattrset(dialog, inputbox_attr);
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if (!input_x) {
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int oldscroll = scroll;
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scroll = scroll < box_width-1 ? 0 : scroll-(box_width-1);
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wmove(dialog, box_y, box_x);
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for (i = 0; i < box_width; i++)
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waddch(dialog, instr[scroll+input_x+i] ? instr[scroll+input_x+i] : ' ');
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input_x = oldscroll - 1 - scroll;
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}
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else
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input_x--;
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wmove(dialog, box_y, input_x + box_x);
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wrefresh(dialog);
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}
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continue;
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case KEY_RIGHT:
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if (scroll+input_x < MAX_LEN) {
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wattrset(dialog, inputbox_attr);
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if (!instr[scroll+input_x])
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instr[scroll+input_x] = ' ';
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if (input_x == box_width-1) {
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scroll++;
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wmove(dialog, box_y, box_x);
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for (i = 0; i < box_width; i++)
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waddch(dialog, instr[scroll+i] ? instr[scroll+i] : ' ');
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wmove(dialog, box_y, box_x + box_width - 1);
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}
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else {
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wmove(dialog, box_y, input_x + box_x);
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waddch(dialog, instr[scroll+input_x]);
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input_x++;
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}
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wrefresh(dialog);
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} else
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flash(); /* Alarm user about overflow */
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continue;
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case KEY_BACKSPACE:
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case KEY_DC:
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if (input_x || scroll) {
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i = strlen(instr);
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memmove(instr+scroll+input_x-1, instr+scroll+input_x, i-scroll+input_x+1);
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wattrset(dialog, inputbox_attr);
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if (!input_x) {
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int oldscroll = scroll;
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scroll = scroll < box_width-1 ? 0 : scroll-(box_width-1);
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wmove(dialog, box_y, box_x);
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for (i = 0; i < box_width; i++)
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waddch(dialog, instr[scroll+input_x+i] ? instr[scroll+input_x+i] : ' ');
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input_x = oldscroll - 1 - scroll;
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}
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else
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input_x--;
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wmove(dialog, box_y, input_x + box_x);
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for (i = input_x; i < box_width; i++)
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waddch(dialog, instr[scroll+i] ? instr[scroll+i] : ' ');
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wmove(dialog, box_y, input_x + box_x);
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wrefresh(dialog);
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}
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continue;
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default:
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if (key < 0x100 && isprint(key)) {
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for (i = strlen(instr) - 1; i >= scroll + input_x && instr[i] == ' '; i--)
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instr[i] = '\0';
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i++;
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if (i < MAX_LEN) {
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memmove(instr+scroll+input_x+1, instr+scroll+input_x, i-scroll+input_x);
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wattrset(dialog, inputbox_attr);
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instr[scroll+input_x] = key;
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if (input_x == box_width-1) {
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scroll++;
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wmove(dialog, box_y, box_x);
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for (i = 0; i < box_width-1; i++)
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waddch(dialog, instr[scroll+i]);
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}
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else {
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wmove(dialog, box_y, input_x + box_x);
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for (i = input_x; i < box_width; i++)
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waddch(dialog, instr[scroll+i] ? instr[scroll+i] : ' ');
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wmove(dialog, box_y, ++input_x + box_x);
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}
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wrefresh(dialog);
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} else
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flash(); /* Alarm user about overflow */
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continue;
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}
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}
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}
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switch (key) {
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case 'O':
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case 'o':
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delwin(dialog);
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strcpy(result, instr);
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return 0;
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case 'C':
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case 'c':
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delwin(dialog);
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return 1;
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case KEY_UP:
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case KEY_LEFT:
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case KEY_BTAB:
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switch (button) {
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case -1:
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button = 1; /* Indicates "Cancel" button is selected */
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print_button(dialog, " OK ", y, x, FALSE);
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print_button(dialog, "Cancel", y, x+14, TRUE);
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wrefresh(dialog);
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break;
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case 0:
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button = -1; /* Indicates input box is selected */
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print_button(dialog, "Cancel", y, x+14, FALSE);
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print_button(dialog, " OK ", y, x, TRUE);
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wmove(dialog, box_y, box_x + input_x);
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wrefresh(dialog);
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break;
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case 1:
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button = 0; /* Indicates "OK" button is selected */
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print_button(dialog, "Cancel", y, x+14, FALSE);
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print_button(dialog, " OK ", y, x, TRUE);
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wrefresh(dialog);
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break;
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}
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break;
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case TAB:
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case KEY_DOWN:
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case KEY_RIGHT:
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switch (button) {
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case -1:
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button = 0; /* Indicates "OK" button is selected */
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print_button(dialog, "Cancel", y, x+14, FALSE);
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print_button(dialog, " OK ", y, x, TRUE);
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wrefresh(dialog);
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break;
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case 0:
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button = 1; /* Indicates "Cancel" button is selected */
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print_button(dialog, " OK ", y, x, FALSE);
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print_button(dialog, "Cancel", y, x+14, TRUE);
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wrefresh(dialog);
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break;
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case 1:
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button = -1; /* Indicates input box is selected */
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print_button(dialog, "Cancel", y, x+14, FALSE);
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print_button(dialog, " OK ", y, x, TRUE);
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wmove(dialog, box_y, box_x + input_x);
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wrefresh(dialog);
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break;
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}
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break;
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case ' ':
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case '\n':
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delwin(dialog);
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for (i = strlen(instr) - 1; i >= scroll + input_x && instr[i] == ' '; i--)
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instr[i] = '\0';
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if (button < 1)
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strcpy(result, instr);
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return (button == -1 ? 0 : button);
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case ESC:
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break;
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}
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}
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delwin(dialog);
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return -1; /* ESC pressed */
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}
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/* End of dialog_inputbox() */
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