Viewing file:  inputbox.c (6.03 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/*
* inputbox.c -- implements the input box
*
* ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
* MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "dialog.h"
unsigned char dialog_input_result[MAX_LEN + 1];
/*
* Print the termination buttons
*/
static void
print_buttons(WINDOW *dialog, int height, int width, int selected)
{
int x = width / 2 - 11;
int y = height - 2;
print_button (dialog, " Ok ", y, x, selected==0);
print_button (dialog, " Help ", y, x + 14, selected==1);
wmove(dialog, y, x+1+14*selected);
wrefresh(dialog);
}
/*
* Display a dialog box for inputing a string
*/
int
dialog_inputbox (const char *title, const char *prompt, int height, int width,
const char *init)
{
int i, x, y, box_y, box_x, box_width;
int input_x = 0, scroll = 0, key = 0, button = -1;
unsigned char *instr = dialog_input_result;
WINDOW *dialog;
/* center dialog box on screen */
x = (COLS - width) / 2;
y = (LINES - height) / 2;
draw_shadow (stdscr, y, x, height, width);
dialog = newwin (height, width, y, x);
keypad (dialog, TRUE);
draw_box (dialog, 0, 0, height, width, dialog_attr, border_attr);
wattrset (dialog, border_attr);
mvwaddch (dialog, height-3, 0, ACS_LTEE);
for (i = 0; i < width - 2; i++)
waddch (dialog, ACS_HLINE);
wattrset (dialog, dialog_attr);
waddch (dialog, ACS_RTEE);
if (title != NULL && strlen(title) >= width-2 ) {
/* truncate long title -- mec */
char * title2 = malloc(width-2+1);
memcpy( title2, title, width-2 );
title2[width-2] = '\0';
title = title2;
}
if (title != NULL) {
wattrset (dialog, title_attr);
mvwaddch (dialog, 0, (width - strlen(title))/2 - 1, ' ');
waddstr (dialog, (char *)title);
waddch (dialog, ' ');
}
wattrset (dialog, dialog_attr);
print_autowrap (dialog, prompt, width - 2, 1, 3);
/* Draw the input field box */
box_width = width - 6;
getyx (dialog, y, x);
box_y = y + 2;
box_x = (width - box_width) / 2;
draw_box (dialog, y + 1, box_x - 1, 3, box_width + 2,
border_attr, dialog_attr);
print_buttons(dialog, height, width, 0);
/* Set up the initial value */
wmove (dialog, box_y, box_x);
wattrset (dialog, inputbox_attr);
if (!init)
instr[0] = '\0';
else
strcpy (instr, init);
input_x = strlen (instr);
if (input_x >= box_width) {
scroll = input_x - box_width + 1;
input_x = box_width - 1;
for (i = 0; i < box_width - 1; i++)
waddch (dialog, instr[scroll + i]);
} else
waddstr (dialog, instr);
wmove (dialog, box_y, box_x + input_x);
wrefresh (dialog);
while (key != ESC) {
key = wgetch (dialog);
if (button == -1) { /* Input box selected */
switch (key) {
case TAB:
case KEY_UP:
case KEY_DOWN:
break;
case KEY_LEFT:
continue;
case KEY_RIGHT:
continue;
case KEY_BACKSPACE:
case 127:
if (input_x || scroll) {
wattrset (dialog, inputbox_attr);
if (!input_x) {
scroll = scroll < box_width - 1 ?
0 : scroll - (box_width - 1);
wmove (dialog, box_y, box_x);
for (i = 0; i < box_width; i++)
waddch (dialog, instr[scroll + input_x + i] ?
instr[scroll + input_x + i] : ' ');
input_x = strlen (instr) - scroll;
} else
input_x--;
instr[scroll + input_x] = '\0';
mvwaddch (dialog, box_y, input_x + box_x, ' ');
wmove (dialog, box_y, input_x + box_x);
wrefresh (dialog);
}
continue;
default:
if (key < 0x100 && isprint (key)) {
if (scroll + input_x < MAX_LEN) {
wattrset (dialog, inputbox_attr);
instr[scroll + input_x] = key;
instr[scroll + input_x + 1] = '\0';
if (input_x == box_width - 1) {
scroll++;
wmove (dialog, box_y, box_x);
for (i = 0; i < box_width - 1; i++)
waddch (dialog, instr[scroll + i]);
} else {
wmove (dialog, box_y, input_x++ + box_x);
waddch (dialog, key);
}
wrefresh (dialog);
} else
flash (); /* Alarm user about overflow */
continue;
}
}
}
switch (key) {
case 'O':
case 'o':
delwin (dialog);
return 0;
case 'H':
case 'h':
delwin (dialog);
return 1;
case KEY_UP:
case KEY_LEFT:
switch (button) {
case -1:
button = 1; /* Indicates "Cancel" button is selected */
print_buttons(dialog, height, width, 1);
break;
case 0:
button = -1; /* Indicates input box is selected */
print_buttons(dialog, height, width, 0);
wmove (dialog, box_y, box_x + input_x);
wrefresh (dialog);
break;
case 1:
button = 0; /* Indicates "OK" button is selected */
print_buttons(dialog, height, width, 0);
break;
}
break;
case TAB:
case KEY_DOWN:
case KEY_RIGHT:
switch (button) {
case -1:
button = 0; /* Indicates "OK" button is selected */
print_buttons(dialog, height, width, 0);
break;
case 0:
button = 1; /* Indicates "Cancel" button is selected */
print_buttons(dialog, height, width, 1);
break;
case 1:
button = -1; /* Indicates input box is selected */
print_buttons(dialog, height, width, 0);
wmove (dialog, box_y, box_x + input_x);
wrefresh (dialog);
break;
}
break;
case ' ':
case '\n':
delwin (dialog);
return (button == -1 ? 0 : button);
case 'X':
case 'x':
key = ESC;
case ESC:
break;
}
}
delwin (dialog);
return -1; /* ESC pressed */
}
|