xref: /freebsd/contrib/dialog/yesno.c (revision 197186496661d8f63639b5b27b33851f727d4da7)
1 /*
2  *  $Id: yesno.c,v 1.51 2011/06/27 08:20:57 tom Exp $
3  *
4  *  yesno.c -- implements the yes/no box
5  *
6  *  Copyright 1999-2010,2011	Thomas E. Dickey
7  *
8  *  This program is free software; you can redistribute it and/or modify
9  *  it under the terms of the GNU Lesser General Public License, version 2.1
10  *  as published by the Free Software Foundation.
11  *
12  *  This program is distributed in the hope that it will be useful, but
13  *  WITHOUT ANY WARRANTY; without even the implied warranty of
14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  *  Lesser General Public License for more details.
16  *
17  *  You should have received a copy of the GNU Lesser General Public
18  *  License along with this program; if not, write to
19  *	Free Software Foundation, Inc.
20  *	51 Franklin St., Fifth Floor
21  *	Boston, MA 02110, USA.
22  *
23  *  An earlier version of this program lists as authors
24  *	Savio Lam (lam836@cs.cuhk.hk)
25  */
26 
27 #include <dialog.h>
28 #include <dlg_keys.h>
29 
30 /*
31  * Display a dialog box with two buttons - Yes and No.
32  */
33 int
34 dialog_yesno(const char *title, const char *cprompt, int height, int width)
35 {
36     /* *INDENT-OFF* */
37     static DLG_KEYS_BINDING binding[] = {
38 	HELPKEY_BINDINGS,
39 	ENTERKEY_BINDINGS,
40 	DLG_KEYS_DATA( DLGK_ENTER,	' ' ),
41 	DLG_KEYS_DATA( DLGK_FIELD_NEXT,	KEY_DOWN ),
42 	DLG_KEYS_DATA( DLGK_FIELD_NEXT, KEY_RIGHT ),
43 	DLG_KEYS_DATA( DLGK_FIELD_NEXT, TAB ),
44 	DLG_KEYS_DATA( DLGK_FIELD_PREV,	KEY_UP ),
45 	DLG_KEYS_DATA( DLGK_FIELD_PREV, KEY_BTAB ),
46 	DLG_KEYS_DATA( DLGK_FIELD_PREV, KEY_LEFT ),
47 	SCROLLKEY_BINDINGS,
48 	END_KEYS_BINDING
49     };
50     /* *INDENT-ON* */
51 
52     int x, y;
53     int key = 0, fkey;
54     int code;
55     int button = dlg_defaultno_button();
56     WINDOW *dialog = 0;
57     int result = DLG_EXIT_UNKNOWN;
58     char *prompt = dlg_strclone(cprompt);
59     const char **buttons = dlg_yes_labels();
60     int min_width = 25;
61     bool show = TRUE;
62     int page, last = 0, offset = 0;
63 
64 #ifdef KEY_RESIZE
65     int req_high = height;
66     int req_wide = width;
67   restart:
68 #endif
69 
70     dlg_tab_correct_str(prompt);
71     dlg_button_layout(buttons, &min_width);
72     dlg_auto_size(title, prompt, &height, &width, 2, min_width);
73     dlg_print_size(height, width);
74     dlg_ctl_size(height, width);
75 
76     x = dlg_box_x_ordinate(width);
77     y = dlg_box_y_ordinate(height);
78 
79 #ifdef KEY_RESIZE
80     if (dialog != 0)
81 	dlg_move_window(dialog, height, width, y, x);
82     else
83 #endif
84     {
85 	dialog = dlg_new_window(height, width, y, x);
86 	dlg_register_window(dialog, "yesno", binding);
87 	dlg_register_buttons(dialog, "yesno", buttons);
88     }
89 
90     dlg_draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
91     dlg_draw_bottom_box(dialog);
92     dlg_draw_title(dialog, title);
93     dlg_draw_helpline(dialog, FALSE);
94 
95     wattrset(dialog, dialog_attr);
96 
97     page = height - (1 + 3 * MARGIN);
98     dlg_draw_buttons(dialog,
99 		     height - 2 * MARGIN, 0,
100 		     buttons, button, FALSE, width);
101 
102     while (result == DLG_EXIT_UNKNOWN) {
103 	if (show) {
104 	    last = dlg_print_scrolled(dialog, prompt, offset,
105 				      page, width, TRUE);
106 	    show = FALSE;
107 	}
108 	key = dlg_mouse_wgetch(dialog, &fkey);
109 	if (dlg_result_key(key, fkey, &result))
110 	    break;
111 	if ((code = dlg_char_to_button(key, buttons)) >= 0) {
112 	    result = dlg_ok_buttoncode(code);
113 	    break;
114 	}
115 	/* handle function keys */
116 	if (fkey) {
117 	    switch (key) {
118 	    case DLGK_FIELD_NEXT:
119 		button = dlg_next_button(buttons, button);
120 		if (button < 0)
121 		    button = 0;
122 		dlg_draw_buttons(dialog,
123 				 height - 2, 0,
124 				 buttons, button,
125 				 FALSE, width);
126 		break;
127 	    case DLGK_FIELD_PREV:
128 		button = dlg_prev_button(buttons, button);
129 		if (button < 0)
130 		    button = 0;
131 		dlg_draw_buttons(dialog,
132 				 height - 2, 0,
133 				 buttons, button,
134 				 FALSE, width);
135 		break;
136 	    case DLGK_ENTER:
137 		result = dlg_yes_buttoncode(button);
138 		break;
139 #ifdef KEY_RESIZE
140 	    case KEY_RESIZE:
141 		dlg_clear();
142 		height = req_high;
143 		width = req_wide;
144 		goto restart;
145 #endif
146 	    default:
147 		if (is_DLGK_MOUSE(key)) {
148 		    result = dlg_yes_buttoncode(key - M_EVENT);
149 		    if (result < 0)
150 			result = DLG_EXIT_OK;
151 		} else if (dlg_check_scrolled(key, last, page,
152 					      &show, &offset) != 0) {
153 		    beep();
154 		}
155 		break;
156 	    }
157 	} else {
158 	    beep();
159 	}
160     }
161 
162     dlg_del_window(dialog);
163     dlg_mouse_free_regions();
164     free(prompt);
165     return result;
166 }
167