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29 * $Id: dup_field.c,v 1.2 2021/03/27 23:41:57 tom Exp $
31 * Demonstrate move_field().
34 #include <test.priv.h>
38 #include <edit_field.h>
39 #include <popup_msg.h>
41 #define MY_DEMO EDIT_FIELD('f')
43 static char empty[] = "";
44 static FIELD *all_fields[100];
51 { CTRL('A'), REQ_BEG_FIELD, "go to beginning of field" },
52 { CTRL('D'), REQ_DOWN_FIELD, "move downward to field" },
53 { CTRL('E'), REQ_END_FIELD, "go to end of field" },
54 { CTRL('G'), MY_DEMO, "move current field with cursor keys" },
55 { CTRL('H'), REQ_DEL_PREV, "delete previous character" },
56 { CTRL('I'), REQ_NEXT_FIELD, "go to next field" },
57 { CTRL('K'), REQ_CLR_EOF, "clear to end of field" },
58 { CTRL('N'), REQ_NEXT_FIELD, "go to next field" },
59 { CTRL('P'), REQ_PREV_FIELD, "go to previous field" },
60 { CTRL('Q'), MY_QUIT, "exit form" },
61 { CTRL('U'), REQ_UP_FIELD, "move upward to field" },
62 { CTRL('W'), REQ_NEXT_WORD, "go to next word" },
63 { CTRL('X'), REQ_CLR_FIELD, "clear field" },
64 { CTRL('['), MY_QUIT, "exit form" },
65 { KEY_F(1), MY_HELP, "show this screen", },
66 { KEY_BACKSPACE, REQ_DEL_PREV, "delete previous character" },
67 { KEY_BTAB, REQ_PREV_FIELD, "go to previous field" },
68 { KEY_DOWN, REQ_DOWN_CHAR, "move down 1 character" },
69 { KEY_END, REQ_LAST_FIELD, "go to last field" },
70 { KEY_HOME, REQ_FIRST_FIELD, "go to first field" },
71 { KEY_LEFT, REQ_LEFT_CHAR, "move left 1 character" },
72 { KEY_NEXT, REQ_NEXT_FIELD, "go to next field" },
73 { KEY_PREVIOUS, REQ_PREV_FIELD, "go to previous field" },
74 { KEY_RIGHT, REQ_RIGHT_CHAR, "move right 1 character" },
75 { KEY_UP, REQ_UP_CHAR, "move up 1 character" }
80 my_help_edit_field(void)
84 char **msgs = typeCalloc(char *, 3 + SIZEOF(commands));
86 msgs[used++] = strdup("Defined form edit/traversal keys:");
87 for (n = 0; n < SIZEOF(commands); ++n) {
90 const char *code = keyname(commands[n].code);
92 #ifdef NCURSES_VERSION
93 if ((name = form_request_name(commands[n].result)) == 0)
95 name = commands[n].help;
96 need = 5 + strlen(code) + strlen(name);
97 msg = typeMalloc(char, need);
98 _nc_SPRINTF(msg, _nc_SLIMIT(need) "%s -- %s", code, name);
102 strdup("Arrow keys move within a field as you would expect.");
104 popup_msg2(stdscr, msgs);
105 for (n = 0; msgs[n] != 0; ++n) {
117 make_label(const char *label, int frow, int fcol)
119 FIELD *f = new_field(1, (int) strlen(label), frow, fcol, 0, 0);
122 set_field_buffer(f, 0, label);
123 set_field_opts(f, (int) ((unsigned) field_opts(f) & ~O_ACTIVE));
129 make_field(int frow, int fcol, int rows, int cols)
131 FIELD *f = new_field(rows, cols, frow, fcol, 0, 1);
134 set_field_back(f, A_UNDERLINE);
135 init_edit_field(f, empty);
143 WINDOW *w = form_win(f);
144 WINDOW *s = form_sub(f);
154 my_form_driver(FORM *form, int c)
158 if (form_driver(form, REQ_VALIDATION) == E_OK)
162 my_help_edit_field();
175 my_field_attrs(FIELD *f)
177 return (FieldAttrs *) field_userptr(f);
181 buffer_length(FIELD *f)
183 return my_field_attrs(f)->row_lengths[0];
187 set_buffer_length(FIELD *f, int length)
189 my_field_attrs(f)->row_lengths[0] = length;
193 offset_in_field(FORM *form)
195 FIELD *field = current_field(form);
198 form_getyx(form, currow, curcol);
199 return curcol + currow * (int) field->dcols;
203 inactive_field(FIELD *f)
205 set_field_back(f, my_field_attrs(f)->background);
209 my_edit_field(FORM *form, int *result)
211 int ch = wgetch(form_win(form));
217 int before_off = offset_in_field(form);
219 form_getyx(form, before_row, before_col);
220 before = current_field(form);
221 set_field_back(before, A_NORMAL);
223 set_field_back(before, A_REVERSE);
224 } else if (ch <= MAX_FORM_COMMAND) {
225 inactive_field(before);
229 for (n = 0; n < SIZEOF(commands); ++n) {
230 if (commands[n].code == ch) {
231 *result = commands[n].result;
236 status = form_driver(form, *result);
238 if (status == E_OK) {
239 bool modified = TRUE;
240 int length = buffer_length(before);
242 if (length < before_off)
249 if ((int) (before_row + 1) == (int) (before->rows))
256 if (length > before_off)
261 if (before_col > 0) {
263 } else if (before_row > 0) {
264 length -= (int) before->cols + before_col;
269 length += (int) before->cols;
273 modified = (ch < MIN_FORM_COMMAND
279 * If we do not force a re-validation, then field_buffer 0 will
280 * be lagging by one character.
282 if (modified && form_driver(form, REQ_VALIDATION) == E_OK && *result
286 set_buffer_length(before, length);
289 if (current_field(form) != before)
290 inactive_field(before);
302 /* describe the form */
303 all_fields[n++] = make_label("Sample Form", 0, 15);
306 all_fields[n++] = make_label(fname, 2, 0);
307 all_fields[n++] = make_field(3, 0, 1, 18);
308 set_field_type(all_fields[n - 1], TYPE_ALPHA, 1);
310 fname = "First Name";
311 all_fields[n++] = make_label(fname, 2, 20);
312 all_fields[n++] = make_field(3, 20, 1, 12);
313 set_field_type(all_fields[n - 1], TYPE_ALPHA, 1);
315 fname = "Middle Name";
316 all_fields[n++] = make_label(fname, 2, 34);
317 all_fields[n++] = make_field(3, 34, 1, 12);
318 set_field_type(all_fields[n - 1], TYPE_ALPHA, 1);
321 all_fields[n++] = make_label(fname, 5, 0);
322 all_fields[n++] = make_field(6, 0, 4, 46);
323 init_edit_field(all_fields[n - 1], empty);
325 all_fields[n] = (FIELD *) 0;
327 if ((form = new_form(all_fields)) != 0) {
333 switch (my_edit_field(form, &c)) {
336 case E_UNKNOWN_COMMAND:
337 finished = my_form_driver(form, c);
349 for (c = 0; all_fields[c] != 0; c++) {
350 free_edit_field(all_fields[c]);
351 free_field(all_fields[c]);
360 setlocale(LC_ALL, "");
366 nonl(); /* lets us read ^M's */
367 intrflush(stdscr, FALSE);
368 keypad(stdscr, TRUE);
372 init_pair(1, COLOR_WHITE, COLOR_BLUE);
373 init_pair(2, COLOR_GREEN, COLOR_BLACK);
374 init_pair(3, COLOR_CYAN, COLOR_BLACK);
375 bkgd((chtype) COLOR_PAIR(1));
382 ExitProgram(EXIT_SUCCESS);
389 printf("This program requires the curses form library\n");
390 ExitProgram(EXIT_FAILURE);