source: menu/lxdialog/inputbox.c@ 4aede02

experimental
Last change on this file since 4aede02 was 613d46b, checked in by George Boudreau <georgeb@…>, 18 years ago

Added new configuration tool.. <make> menuconfig. Needs work, especially inline help text
  • Property mode set to 100644
File size: 6.0 KB
Line 
1/*
2 * inputbox.c -- implements the input box
3 *
4 * ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
5 * MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21
22#include "dialog.h"
23
24unsigned char dialog_input_result[MAX_LEN + 1];
25
26/*
27 * Print the termination buttons
28 */
29static void
30print_buttons(WINDOW *dialog, int height, int width, int selected)
31{
32 int x = width / 2 - 11;
33 int y = height - 2;
34
35 print_button (dialog, " Ok ", y, x, selected==0);
36 print_button (dialog, " Help ", y, x + 14, selected==1);
37
38 wmove(dialog, y, x+1+14*selected);
39 wrefresh(dialog);
40}
41
42/*
43 * Display a dialog box for inputing a string
44 */
45int
46dialog_inputbox (const char *title, const char *prompt, int height, int width,
47 const char *init)
48{
49 int i, x, y, box_y, box_x, box_width;
50 int input_x = 0, scroll = 0, key = 0, button = -1;
51 unsigned char *instr = dialog_input_result;
52 WINDOW *dialog;
53
54 /* center dialog box on screen */
55 x = (COLS - width) / 2;
56 y = (LINES - height) / 2;
57
58
59 draw_shadow (stdscr, y, x, height, width);
60
61 dialog = newwin (height, width, y, x);
62 keypad (dialog, TRUE);
63
64 draw_box (dialog, 0, 0, height, width, dialog_attr, border_attr);
65 wattrset (dialog, border_attr);
66 mvwaddch (dialog, height-3, 0, ACS_LTEE);
67 for (i = 0; i < width - 2; i++)
68 waddch (dialog, ACS_HLINE);
69 wattrset (dialog, dialog_attr);
70 waddch (dialog, ACS_RTEE);
71
72 if (title != NULL && strlen(title) >= width-2 ) {
73 /* truncate long title -- mec */
74 char * title2 = malloc(width-2+1);
75 memcpy( title2, title, width-2 );
76 title2[width-2] = '\0';
77 title = title2;
78 }
79
80 if (title != NULL) {
81 wattrset (dialog, title_attr);
82 mvwaddch (dialog, 0, (width - strlen(title))/2 - 1, ' ');
83 waddstr (dialog, (char *)title);
84 waddch (dialog, ' ');
85 }
86
87 wattrset (dialog, dialog_attr);
88 print_autowrap (dialog, prompt, width - 2, 1, 3);
89
90 /* Draw the input field box */
91 box_width = width - 6;
92 getyx (dialog, y, x);
93 box_y = y + 2;
94 box_x = (width - box_width) / 2;
95 draw_box (dialog, y + 1, box_x - 1, 3, box_width + 2,
96 border_attr, dialog_attr);
97
98 print_buttons(dialog, height, width, 0);
99
100 /* Set up the initial value */
101 wmove (dialog, box_y, box_x);
102 wattrset (dialog, inputbox_attr);
103
104 if (!init)
105 instr[0] = '\0';
106 else
107 strcpy (instr, init);
108
109 input_x = strlen (instr);
110
111 if (input_x >= box_width) {
112 scroll = input_x - box_width + 1;
113 input_x = box_width - 1;
114 for (i = 0; i < box_width - 1; i++)
115 waddch (dialog, instr[scroll + i]);
116 } else
117 waddstr (dialog, instr);
118
119 wmove (dialog, box_y, box_x + input_x);
120
121 wrefresh (dialog);
122
123 while (key != ESC) {
124 key = wgetch (dialog);
125
126 if (button == -1) { /* Input box selected */
127 switch (key) {
128 case TAB:
129 case KEY_UP:
130 case KEY_DOWN:
131 break;
132 case KEY_LEFT:
133 continue;
134 case KEY_RIGHT:
135 continue;
136 case KEY_BACKSPACE:
137 case 127:
138 if (input_x || scroll) {
139 wattrset (dialog, inputbox_attr);
140 if (!input_x) {
141 scroll = scroll < box_width - 1 ?
142 0 : scroll - (box_width - 1);
143 wmove (dialog, box_y, box_x);
144 for (i = 0; i < box_width; i++)
145 waddch (dialog, instr[scroll + input_x + i] ?
146 instr[scroll + input_x + i] : ' ');
147 input_x = strlen (instr) - scroll;
148 } else
149 input_x--;
150 instr[scroll + input_x] = '\0';
151 mvwaddch (dialog, box_y, input_x + box_x, ' ');
152 wmove (dialog, box_y, input_x + box_x);
153 wrefresh (dialog);
154 }
155 continue;
156 default:
157 if (key < 0x100 && isprint (key)) {
158 if (scroll + input_x < MAX_LEN) {
159 wattrset (dialog, inputbox_attr);
160 instr[scroll + input_x] = key;
161 instr[scroll + input_x + 1] = '\0';
162 if (input_x == box_width - 1) {
163 scroll++;
164 wmove (dialog, box_y, box_x);
165 for (i = 0; i < box_width - 1; i++)
166 waddch (dialog, instr[scroll + i]);
167 } else {
168 wmove (dialog, box_y, input_x++ + box_x);
169 waddch (dialog, key);
170 }
171 wrefresh (dialog);
172 } else
173 flash (); /* Alarm user about overflow */
174 continue;
175 }
176 }
177 }
178 switch (key) {
179 case 'O':
180 case 'o':
181 delwin (dialog);
182 return 0;
183 case 'H':
184 case 'h':
185 delwin (dialog);
186 return 1;
187 case KEY_UP:
188 case KEY_LEFT:
189 switch (button) {
190 case -1:
191 button = 1; /* Indicates "Cancel" button is selected */
192 print_buttons(dialog, height, width, 1);
193 break;
194 case 0:
195 button = -1; /* Indicates input box is selected */
196 print_buttons(dialog, height, width, 0);
197 wmove (dialog, box_y, box_x + input_x);
198 wrefresh (dialog);
199 break;
200 case 1:
201 button = 0; /* Indicates "OK" button is selected */
202 print_buttons(dialog, height, width, 0);
203 break;
204 }
205 break;
206 case TAB:
207 case KEY_DOWN:
208 case KEY_RIGHT:
209 switch (button) {
210 case -1:
211 button = 0; /* Indicates "OK" button is selected */
212 print_buttons(dialog, height, width, 0);
213 break;
214 case 0:
215 button = 1; /* Indicates "Cancel" button is selected */
216 print_buttons(dialog, height, width, 1);
217 break;
218 case 1:
219 button = -1; /* Indicates input box is selected */
220 print_buttons(dialog, height, width, 0);
221 wmove (dialog, box_y, box_x + input_x);
222 wrefresh (dialog);
223 break;
224 }
225 break;
226 case ' ':
227 case '\n':
228 delwin (dialog);
229 return (button == -1 ? 0 : button);
230 case 'X':
231 case 'x':
232 key = ESC;
233 case ESC:
234 break;
235 }
236 }
237
238 delwin (dialog);
239 return -1; /* ESC pressed */
240}
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