2 * This file is part of DisOrder.
3 * Copyright (C) 2006-2008 Richard Kettlewell
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
20 /** @file disobedience/control.c
21 * @brief Volume control and buttons
24 #include "disobedience.h"
27 /* Forward declarations ---------------------------------------------------- */
31 static void clicked_icon(GtkButton
*, gpointer
);
32 static void clicked_menu(GtkMenuItem
*, gpointer userdata
);
33 static void toggled_menu(GtkCheckMenuItem
*, gpointer userdata
);
35 static int enable_rtp(disorder_eclient
*c
,
36 disorder_eclient_no_response
*completed
,
38 static int disable_rtp(disorder_eclient
*c
,
39 disorder_eclient_no_response
*completed
,
42 static double left(double v
, double b
);
43 static double right(double v
, double b
);
44 static double volume(double l
, double r
);
45 static double balance(double l
, double r
);
47 static void volume_adjusted(GtkAdjustment
*a
, gpointer user_data
);
48 static gchar
*format_volume(GtkScale
*scale
, gdouble value
);
49 static gchar
*format_balance(GtkScale
*scale
, gdouble value
);
51 static void icon_changed(const char *event
,
54 static void volume_changed(const char *event
,
58 /* Control bar ------------------------------------------------------------- */
60 /** @brief Guard against feedback */
61 int suppress_actions
= 1;
63 /** @brief Definition of an icon
65 * We have two kinds of icon:
66 * - action icons, which just do something but don't have a state as such
67 * - toggle icons, which toggle between two states ("on" and "off").
69 * The scratch button is an action icon; currently all the others are toggle
72 * (All icons can be sensitive or insensitive, separately to the above.)
75 /** @brief Filename for 'on' image */
78 /** @brief Text for 'on' tooltip */
81 /** @brief Filename for 'off' image or NULL for an action icon */
84 /** @brief Text for 'off tooltip */
87 /** @brief Associated menu item or NULL */
90 /** @brief Events that change this icon, separated by spaces */
93 /** @brief @ref eclient.h function to call to go from off to on
95 * For action buttons, this should be NULL.
97 int (*action_go_on
)(disorder_eclient
*c
,
98 disorder_eclient_no_response
*completed
,
101 /** @brief @ref eclient.h function to call to go from on to off
103 * For action buttons, this action is used.
105 int (*action_go_off
)(disorder_eclient
*c
,
106 disorder_eclient_no_response
*completed
,
109 /** @brief Get button state
110 * @return 1 for on, 0 for off
114 /** @brief Get button sensitivity
115 * @return 1 for sensitive, 0 for insensitive
117 * Can be NULL for always sensitive.
119 int (*sensitive
)(void);
121 /** @brief Pointer to button */
124 /** @brief Pointer to menu item */
128 GtkWidget
*image_off
;
131 static int pause_resume_on(void) {
132 return !(last_state
& DISORDER_TRACK_PAUSED
);
135 static int pause_resume_sensitive(void) {
136 return !!(last_state
& DISORDER_PLAYING
)
137 && (last_rights
& RIGHT_PAUSE
);
140 static int scratch_sensitive(void) {
141 return !!(last_state
& DISORDER_PLAYING
)
142 && right_scratchable(last_rights
, config
->username
, playing_track
);
145 static int random_sensitive(void) {
146 return !!(last_rights
& RIGHT_GLOBAL_PREFS
);
149 static int random_enabled(void) {
150 return !!(last_state
& DISORDER_RANDOM_ENABLED
);
153 static int playing_sensitive(void) {
154 return !!(last_rights
& RIGHT_GLOBAL_PREFS
);
157 static int playing_enabled(void) {
158 return !!(last_state
& DISORDER_PLAYING_ENABLED
);
161 static int rtp_enabled(void) {
162 return rtp_is_running
;
165 static int rtp_sensitive(void) {
166 return rtp_supported
;
169 /** @brief Table of all icons */
170 static struct icon icons
[] = {
172 icon_on
: "pause.png",
173 tip_on
: "Pause playing track",
174 icon_off
: "play.png",
175 tip_off
: "Resume playing track",
176 menuitem
: "<GdisorderMain>/Control/Playing",
178 sensitive
: pause_resume_sensitive
,
179 action_go_on
: disorder_eclient_resume
,
180 action_go_off
: disorder_eclient_pause
,
181 events
: "pause-changed playing-changed rights-changed",
184 icon_on
: "cross.png",
185 tip_on
: "Cancel playing track",
186 menuitem
: "<GdisorderMain>/Control/Scratch",
187 sensitive
: scratch_sensitive
,
188 action_go_off
: disorder_eclient_scratch_playing
,
189 events
: "playing-track-changed rights-changed",
192 icon_on
: "randomcross.png",
193 tip_on
: "Disable random play",
194 icon_off
: "random.png",
195 tip_off
: "Enable random play",
196 menuitem
: "<GdisorderMain>/Control/Random play",
198 sensitive
: random_sensitive
,
199 action_go_on
: disorder_eclient_random_enable
,
200 action_go_off
: disorder_eclient_random_disable
,
201 events
: "random-changed rights-changed",
204 icon_on
: "notescross.png",
205 tip_on
: "Disable play",
206 icon_off
: "notes.png",
207 tip_off
: "Enable play",
209 sensitive
: playing_sensitive
,
210 action_go_on
: disorder_eclient_enable
,
211 action_go_off
: disorder_eclient_disable
,
212 events
: "enabled-changed rights-changed",
215 icon_on
: "speakercross.png",
216 tip_on
: "Stop playing network stream",
217 icon_off
: "speaker.png",
218 tip_off
: "Play network stream",
219 menuitem
: "<GdisorderMain>/Control/Network player",
221 sensitive
: rtp_sensitive
,
222 action_go_on
: enable_rtp
,
223 action_go_off
: disable_rtp
,
224 events
: "rtp-changed",
228 /** @brief Count of icons */
229 #define NICONS (int)(sizeof icons / sizeof *icons)
231 static GtkAdjustment
*volume_adj
;
232 static GtkAdjustment
*balance_adj
;
233 static GtkWidget
*volume_widget
;
234 static GtkWidget
*balance_widget
;
236 /** @brief Create the control bar */
237 GtkWidget
*control_widget(void) {
238 GtkWidget
*hbox
= gtk_hbox_new(FALSE
, 1), *vbox
;
241 D(("control_widget"));
242 assert(mainmenufactory
); /* ordering must be right */
243 for(n
= 0; n
< NICONS
; ++n
) {
244 /* Create the button */
245 icons
[n
].button
= gtk_button_new();
246 gtk_widget_set_style(icons
[n
].button
, tool_style
);
247 icons
[n
].image_on
= gtk_image_new_from_pixbuf(find_image(icons
[n
].icon_on
));
248 gtk_widget_set_style(icons
[n
].image_on
, tool_style
);
249 g_object_ref(icons
[n
].image_on
);
250 /* If it's a toggle icon, create the 'off' half too */
251 if(icons
[n
].icon_off
) {
252 icons
[n
].image_off
= gtk_image_new_from_pixbuf(find_image(icons
[n
].icon_off
));
253 gtk_widget_set_style(icons
[n
].image_off
, tool_style
);
254 g_object_ref(icons
[n
].image_off
);
256 g_signal_connect(G_OBJECT(icons
[n
].button
), "clicked",
257 G_CALLBACK(clicked_icon
), &icons
[n
]);
258 /* pop the icon in a vbox so it doesn't get vertically stretch if there are
259 * taller things in the control bar */
260 vbox
= gtk_vbox_new(FALSE
, 0);
261 gtk_box_pack_start(GTK_BOX(vbox
), icons
[n
].button
, TRUE
, FALSE
, 0);
262 gtk_box_pack_start(GTK_BOX(hbox
), vbox
, FALSE
, FALSE
, 0);
263 if(icons
[n
].menuitem
) {
264 /* Find the menu item */
265 icons
[n
].item
= gtk_item_factory_get_widget(mainmenufactory
,
267 if(icons
[n
].icon_off
)
268 g_signal_connect(G_OBJECT(icons
[n
].item
), "toggled",
269 G_CALLBACK(toggled_menu
), &icons
[n
]);
271 g_signal_connect(G_OBJECT(icons
[n
].item
), "activate",
272 G_CALLBACK(clicked_menu
), &icons
[n
]);
274 /* Make sure the icon is updated when relevant things changed */
275 char **events
= split(icons
[n
].events
, 0, 0, 0, 0);
277 event_register(*events
++, icon_changed
, &icons
[n
]);
278 event_register("connected-changed", icon_changed
, &icons
[n
]);
280 /* create the adjustments for the volume control */
281 volume_adj
= GTK_ADJUSTMENT(gtk_adjustment_new(0, 0, goesupto
,
282 goesupto
/ 20, goesupto
/ 20,
284 balance_adj
= GTK_ADJUSTMENT(gtk_adjustment_new(0, -1, 1,
286 /* the volume control */
287 volume_widget
= gtk_hscale_new(volume_adj
);
288 balance_widget
= gtk_hscale_new(balance_adj
);
289 gtk_widget_set_style(volume_widget
, tool_style
);
290 gtk_widget_set_style(balance_widget
, tool_style
);
291 gtk_scale_set_digits(GTK_SCALE(volume_widget
), 10);
292 gtk_scale_set_digits(GTK_SCALE(balance_widget
), 10);
293 gtk_widget_set_size_request(volume_widget
, 192, -1);
294 gtk_widget_set_size_request(balance_widget
, 192, -1);
295 gtk_tooltips_set_tip(tips
, volume_widget
, "Volume", "");
296 gtk_tooltips_set_tip(tips
, balance_widget
, "Balance", "");
297 gtk_box_pack_start(GTK_BOX(hbox
), volume_widget
, FALSE
, TRUE
, 0);
298 gtk_box_pack_start(GTK_BOX(hbox
), balance_widget
, FALSE
, TRUE
, 0);
299 /* space updates rather than hammering the server */
300 gtk_range_set_update_policy(GTK_RANGE(volume_widget
), GTK_UPDATE_DELAYED
);
301 gtk_range_set_update_policy(GTK_RANGE(balance_widget
), GTK_UPDATE_DELAYED
);
302 /* notice when the adjustments are changed */
303 g_signal_connect(G_OBJECT(volume_adj
), "value-changed",
304 G_CALLBACK(volume_adjusted
), 0);
305 g_signal_connect(G_OBJECT(balance_adj
), "value-changed",
306 G_CALLBACK(volume_adjusted
), 0);
307 /* format the volume/balance values ourselves */
308 g_signal_connect(G_OBJECT(volume_widget
), "format-value",
309 G_CALLBACK(format_volume
), 0);
310 g_signal_connect(G_OBJECT(balance_widget
), "format-value",
311 G_CALLBACK(format_balance
), 0);
312 event_register("volume-changed", volume_changed
, 0);
313 event_register("rtp-changed", volume_changed
, 0);
317 /** @brief Update the volume control when it changes */
318 static void volume_changed(const char attribute((unused
)) *event
,
319 void attribute((unused
)) *eventdata
,
320 void attribute((unused
)) *callbackdata
) {
322 gboolean volume_supported
;
324 D(("volume_changed"));
326 /* Only display volume/balance controls if they will work */
328 || (rtp_supported
&& mixer_supported(DEFAULT_BACKEND
)))
329 volume_supported
= TRUE
;
331 volume_supported
= FALSE
;
332 /* TODO: if the server doesn't know how to set the volume [but isn't using
333 * network play] then we should have volume_supported = FALSE */
334 if(volume_supported
) {
335 gtk_widget_show(volume_widget
);
336 gtk_widget_show(balance_widget
);
337 l
= volume_l
/ 100.0;
338 r
= volume_r
/ 100.0;
339 gtk_adjustment_set_value(volume_adj
, volume(l
, r
) * goesupto
);
340 gtk_adjustment_set_value(balance_adj
, balance(l
, r
));
342 gtk_widget_hide(volume_widget
);
343 gtk_widget_hide(balance_widget
);
348 /** @brief Update the state of one of the control icons
350 static void icon_changed(const char attribute((unused
)) *event
,
351 void attribute((unused
)) *evendata
,
352 void *callbackdata
) {
353 //fprintf(stderr, "icon_changed (%s)\n", event);
354 const struct icon
*const icon
= callbackdata
;
355 int on
= icon
->on ? icon
->on() : 1;
356 int sensitive
= icon
->sensitive ? icon
->sensitive() : 1;
357 //fprintf(stderr, "sensitive->%d\n", sensitive);
358 GtkWidget
*child
, *newchild
;
361 /* If the connection is down nothing is ever usable */
362 if(!(last_state
& DISORDER_CONNECTED
))
364 //fprintf(stderr, "(checked connected) sensitive->%d\n", sensitive);
365 /* Replace the child */
366 newchild
= on ? icon
->image_on
: icon
->image_off
;
367 child
= gtk_bin_get_child(GTK_BIN(icon
->button
));
368 if(child
!= newchild
) {
370 gtk_container_remove(GTK_CONTAINER(icon
->button
), child
);
371 gtk_container_add(GTK_CONTAINER(icon
->button
), newchild
);
372 gtk_widget_show(newchild
);
374 /* If you disable play or random play NOT via the icon (for instance, via the
375 * edit menu or via a completely separate command line invocation) then the
376 * icon shows up as insensitive. Hover the mouse over it and the correct
377 * state is immediately displayed. sensitive and GTK_WIDGET_SENSITIVE show
378 * it to be in the correct state, so I think this is may be a GTK+ bug. */
380 gtk_tooltips_set_tip(tips
, icon
->button
,
381 on ? icon
->tip_on
: icon
->tip_off
, "");
382 gtk_widget_set_sensitive(icon
->button
, sensitive
);
383 /* Icons with an associated menu item */
386 gtk_check_menu_item_set_active(GTK_CHECK_MENU_ITEM(icon
->item
), on
);
387 gtk_widget_set_sensitive(icon
->item
, sensitive
);
392 static void icon_action_completed(void attribute((unused
)) *v
,
395 popup_protocol_error(0, err
);
398 static void clicked_icon(GtkButton
attribute((unused
)) *button
,
400 const struct icon
*icon
= userdata
;
404 if(!icon
->on
|| icon
->on())
405 icon
->action_go_off(client
, icon_action_completed
, 0);
407 icon
->action_go_on(client
, icon_action_completed
, 0);
410 static void clicked_menu(GtkMenuItem
attribute((unused
)) *menuitem
,
412 clicked_icon(NULL
, userdata
);
415 static void toggled_menu(GtkCheckMenuItem
attribute((unused
)) *menuitem
,
417 clicked_icon(NULL
, userdata
);
420 /** @brief Called when a volume command completes */
421 static void volume_completed(void attribute((unused
)) *v
,
423 int attribute((unused
)) l
,
424 int attribute((unused
)) r
) {
426 popup_protocol_error(0, err
);
427 /* We don't set the UI's notion of the volume here, it is set from the log
428 * regardless of the reason it changed */
431 /** @brief Called when the volume has been adjusted */
432 static void volume_adjusted(GtkAdjustment
attribute((unused
)) *a
,
433 gpointer
attribute((unused
)) user_data
) {
434 double v
= gtk_adjustment_get_value(volume_adj
) / goesupto
;
435 double b
= gtk_adjustment_get_value(balance_adj
);
438 /* This is the result of an update from the server, not a change from the
439 * user. Don't feedback! */
441 D(("volume_adjusted"));
442 /* force to 'stereotypical' values */
443 v
= nearbyint(100 * v
) / 100;
444 b
= nearbyint(5 * b
) / 5;
445 /* Set the volume. We don't want a reply, we'll get the actual new volume
448 int l
= nearbyint(left(v
, b
) * 100), r
= nearbyint(right(v
, b
) * 100);
449 mixer_control(DEFAULT_BACKEND
, &l
, &r
, 1);
451 disorder_eclient_volume(client
, volume_completed
,
452 nearbyint(left(v
, b
) * 100),
453 nearbyint(right(v
, b
) * 100),
457 /** @brief Formats the volume value */
458 static gchar
*format_volume(GtkScale
attribute((unused
)) *scale
,
462 snprintf(s
, sizeof s
, "%.1f", (double)value
);
466 /** @brief Formats the balance value */
467 static gchar
*format_balance(GtkScale
attribute((unused
)) *scale
,
471 if(fabs(value
) < 0.1)
472 return g_strdup("0");
473 snprintf(s
, sizeof s
, "%+.1f", (double)value
);
477 /* Volume mapping. We consider left, right, volume to be in [0,1]
478 * and balance to be in [-1,1].
480 * First, we just have volume = max(left, right).
482 * Balance we consider to linearly represent the amount by which the quieter
483 * channel differs from the louder. In detail:
485 * if right > left then balance > 0:
486 * balance = 0 => left = right (as an endpoint, not an instance)
487 * balance = 1 => left = 0
488 * fitting to linear, left = right * (1 - balance)
489 * so balance = 1 - left / right
490 * (right > left => right > 0 so no division by 0.)
492 * if left > right then balance < 0:
493 * balance = 0 => right = left (same caveat as above)
494 * balance = -1 => right = 0
495 * again fitting to linear, right = left * (1 + balance)
496 * so balance = right / left - 1
497 * (left > right => left > 0 so no division by 0.)
499 * if left = right then we just have balance = 0.
501 * Thanks to Clive and Andrew.
504 /** @brief Return the greater of @p x and @p y */
505 static double max(double x
, double y
) {
506 return x
> y ? x
: y
;
509 /** @brief Compute the left channel volume */
510 static double left(double v
, double b
) {
511 if(b
> 0) /* volume = right */
513 else /* volume = left */
517 /** @brief Compute the right channel volume */
518 static double right(double v
, double b
) {
519 if(b
> 0) /* volume = right */
521 else /* volume = left */
525 /** @brief Compute the overall volume */
526 static double volume(double l
, double r
) {
530 /** @brief Compute the balance */
531 static double balance(double l
, double r
) {
536 else /* left = right */
540 /** @brief Called to enable RTP play
542 * Rather odd signature is to fit in with the other icons which all call @ref
543 * lib/eclient.h functions.
545 static int enable_rtp(disorder_eclient
attribute((unused
)) *c
,
546 disorder_eclient_no_response
attribute((unused
)) *completed
,
547 void attribute((unused
)) *v
) {
552 /** @brief Called to disable RTP play
554 * Rather odd signature is to fit in with the other icons which all call @ref
555 * lib/eclient.h functions.
557 static int disable_rtp(disorder_eclient
attribute((unused
)) *c
,
558 disorder_eclient_no_response
attribute((unused
)) *completed
,
559 void attribute((unused
)) *v
) {