1 /*
2 Widgets for the Midnight Commander
3
4 Copyright (C) 1994-2021
5 Free Software Foundation, Inc.
6
7 Authors:
8 Radek Doulik, 1994, 1995
9 Miguel de Icaza, 1994, 1995
10 Jakub Jelinek, 1995
11 Andrej Borsenkow, 1996
12 Norbert Warmuth, 1997
13 Andrew Borodin <aborodin@vmail.ru>, 2009, 2010, 2013, 2016
14
15 This file is part of the Midnight Commander.
16
17 The Midnight Commander is free software: you can redistribute it
18 and/or modify it under the terms of the GNU General Public License as
19 published by the Free Software Foundation, either version 3 of the License,
20 or (at your option) any later version.
21
22 The Midnight Commander is distributed in the hope that it will be useful,
23 but WITHOUT ANY WARRANTY; without even the implied warranty of
24 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 GNU General Public License for more details.
26
27 You should have received a copy of the GNU General Public License
28 along with this program. If not, see <http://www.gnu.org/licenses/>.
29 */
30
31 /** \file button.c
32 * \brief Source: WButton widget
33 */
34
35 #include <config.h>
36
37 #include <stdlib.h>
38
39 #include "lib/global.h"
40
41 #include "lib/tty/tty.h"
42 #include "lib/strutil.h"
43 #include "lib/widget.h"
44
45 /*** global variables ****************************************************************************/
46
47 /*** file scope macro definitions ****************************************************************/
48
49 /*** file scope type declarations ****************************************************************/
50
51 /*** file scope variables ************************************************************************/
52
53 /* --------------------------------------------------------------------------------------------- */
54 /*** file scope functions ************************************************************************/
55 /* --------------------------------------------------------------------------------------------- */
56
57 /* --------------------------------------------------------------------------------------------- */
58 /*** public functions ****************************************************************************/
59 /* --------------------------------------------------------------------------------------------- */
60
61 cb_ret_t
button_default_callback(Widget * w,Widget * sender,widget_msg_t msg,int parm,void * data)62 button_default_callback (Widget * w, Widget * sender, widget_msg_t msg, int parm, void *data)
63 {
64 WButton *b = BUTTON (w);
65 WGroup *g = w->owner;
66 WDialog *h = DIALOG (g);
67 int off = 0;
68
69 switch (msg)
70 {
71 case MSG_HOTKEY:
72 /*
73 * Don't let the default button steal Enter from the current
74 * button. This is a workaround for the flawed event model
75 * when hotkeys are sent to all widgets before the key is
76 * handled by the current widget.
77 */
78 if (parm == '\n' && WIDGET (g->current->data) == w)
79 {
80 send_message (w, sender, MSG_KEY, ' ', data);
81 return MSG_HANDLED;
82 }
83
84 if (parm == '\n' && b->flags == DEFPUSH_BUTTON)
85 {
86 send_message (w, sender, MSG_KEY, ' ', data);
87 return MSG_HANDLED;
88 }
89
90 if (b->text.hotkey != NULL && g_ascii_tolower ((gchar) b->text.hotkey[0]) == parm)
91 {
92 send_message (w, sender, MSG_KEY, ' ', data);
93 return MSG_HANDLED;
94 }
95 return MSG_NOT_HANDLED;
96
97 case MSG_KEY:
98 if (parm != ' ' && parm != '\n')
99 return MSG_NOT_HANDLED;
100
101 h->ret_value = b->action;
102 if (b->callback == NULL || b->callback (b, b->action) != 0)
103 dlg_stop (h);
104
105 return MSG_HANDLED;
106
107 case MSG_CURSOR:
108 switch (b->flags)
109 {
110 case DEFPUSH_BUTTON:
111 off = 3;
112 break;
113 case NORMAL_BUTTON:
114 off = 2;
115 break;
116 case NARROW_BUTTON:
117 off = 1;
118 break;
119 case HIDDEN_BUTTON:
120 default:
121 off = 0;
122 break;
123 }
124 widget_gotoyx (w, 0, b->hotpos + off);
125 return MSG_HANDLED;
126
127 case MSG_DRAW:
128 {
129 gboolean focused;
130
131 focused = widget_get_state (w, WST_FOCUSED);
132
133 widget_selectcolor (w, focused, FALSE);
134 widget_gotoyx (w, 0, 0);
135
136 switch (b->flags)
137 {
138 case DEFPUSH_BUTTON:
139 tty_print_string ("[< ");
140 break;
141 case NORMAL_BUTTON:
142 tty_print_string ("[ ");
143 break;
144 case NARROW_BUTTON:
145 tty_print_string ("[");
146 break;
147 case HIDDEN_BUTTON:
148 default:
149 return MSG_HANDLED;
150 }
151
152 hotkey_draw (w, b->text, focused);
153
154 switch (b->flags)
155 {
156 case DEFPUSH_BUTTON:
157 tty_print_string (" >]");
158 break;
159 case NORMAL_BUTTON:
160 tty_print_string (" ]");
161 break;
162 case NARROW_BUTTON:
163 tty_print_string ("]");
164 break;
165 default:
166 break;
167 }
168
169 return MSG_HANDLED;
170 }
171
172 case MSG_DESTROY:
173 hotkey_free (b->text);
174 return MSG_HANDLED;
175
176 default:
177 return widget_default_callback (w, sender, msg, parm, data);
178 }
179 }
180
181 /* --------------------------------------------------------------------------------------------- */
182
183 void
button_mouse_default_callback(Widget * w,mouse_msg_t msg,mouse_event_t * event)184 button_mouse_default_callback (Widget * w, mouse_msg_t msg, mouse_event_t * event)
185 {
186 (void) event;
187
188 switch (msg)
189 {
190 case MSG_MOUSE_DOWN:
191 widget_select (w);
192 break;
193
194 case MSG_MOUSE_CLICK:
195 send_message (w, NULL, MSG_KEY, ' ', NULL);
196 send_message (w->owner, w, MSG_POST_KEY, ' ', NULL);
197 break;
198
199 default:
200 break;
201 }
202 }
203
204 /* --------------------------------------------------------------------------------------------- */
205
206 WButton *
button_new(int y,int x,int action,button_flags_t flags,const char * text,bcback_fn callback)207 button_new (int y, int x, int action, button_flags_t flags, const char *text, bcback_fn callback)
208 {
209 WButton *b;
210 Widget *w;
211
212 b = g_new (WButton, 1);
213 w = WIDGET (b);
214
215 b->action = action;
216 b->flags = flags;
217 b->text = hotkey_new (text);
218 widget_init (w, y, x, 1, button_get_len (b), button_default_callback,
219 button_mouse_default_callback);
220 w->options |= WOP_SELECTABLE | WOP_WANT_CURSOR | WOP_WANT_HOTKEY;
221 b->callback = callback;
222 b->hotpos = (b->text.hotkey != NULL) ? str_term_width1 (b->text.start) : -1;
223
224 return b;
225 }
226
227 /* --------------------------------------------------------------------------------------------- */
228
229 char *
button_get_text(const WButton * b)230 button_get_text (const WButton * b)
231 {
232 return hotkey_get_text (b->text);
233 }
234
235 /* --------------------------------------------------------------------------------------------- */
236
237 void
button_set_text(WButton * b,const char * text)238 button_set_text (WButton * b, const char *text)
239 {
240 Widget *w = WIDGET (b);
241 hotkey_t hk;
242
243 hk = hotkey_new (text);
244 if (hotkey_equal (b->text, hk))
245 {
246 hotkey_free (hk);
247 return;
248 }
249
250 hotkey_free (b->text);
251 b->text = hk;
252 b->hotpos = (b->text.hotkey != NULL) ? str_term_width1 (b->text.start) : -1;
253 w->cols = button_get_len (b);
254 widget_draw (w);
255 }
256
257 /* --------------------------------------------------------------------------------------------- */
258
259 int
button_get_len(const WButton * b)260 button_get_len (const WButton * b)
261 {
262 int ret = hotkey_width (b->text);
263
264 switch (b->flags)
265 {
266 case DEFPUSH_BUTTON:
267 ret += 6;
268 break;
269 case NORMAL_BUTTON:
270 ret += 4;
271 break;
272 case NARROW_BUTTON:
273 ret += 2;
274 break;
275 case HIDDEN_BUTTON:
276 default:
277 return 0;
278 }
279
280 return ret;
281 }
282
283 /* --------------------------------------------------------------------------------------------- */
284