1 # indicator-keyboard-led - simulate keyboard lock keys LED
3 This is a Unity application indicator designed for keyboards without lock
4 keys LED. It allows the user to check the state of the three locks (Caps lock,
5 Num lock and Scroll lock) without requiring any mouse or keyboard action. It
6 also allows the lock keys to be toggled with mouse clicks, which could be
7 useful for keyboards without Scroll lock keys or malfunctioning keyboards.
11 ![indicator default][sc1]
12 Default appearance of the indicator with Num lock on and Caps and Scroll locks
15 ![indicator menu][sc2]
16 Menu of the indicator, shown on click. The locks can be toggled by clicking
17 the respective item in the menu.
19 ![indicator short][sc3]
20 Alternative (short) appearance of the indicator.
22 ## Installation from Ubuntu PPA
24 * This is a work in progress. *
26 After installation the postinst script will prompt you for preferences
27 configuration. These config are explained here:
31 The default appearance of the indicator has long labels:
32 ![⚫Num ⚫Caps ⚫Scroll][sc1]
34 On small displays it may be preferable to use short labels:
39 This option allows you to reorder the locks and also to hide
40 some locks if you don't need them.
42 Use a string consisting of zero or one occurrence of the
43 characters 'N', 'C' and 'S' to set this option.
45 For exampe, the default order is "Num Caps Scroll".
46 ![⚫Num ⚫Caps ⚫Scroll][sc1]
48 **CNS** changes this to "Caps Num Scroll".
49 ![⚫Caps ⚫Num ⚫Scroll][sc4]
51 **NC** hides Scroll lock from the default appearance.
54 **C**, combined with the previous *short* option,
55 would give a very compact Caps lock indicator.
58 [sc1]: screenshots/sc1.png
59 [sc2]: screenshots/sc2.png
60 [sc3]: screenshots/sc3.png
61 [sc4]: screenshots/sc4.png
62 [sc5]: screenshots/sc5.png
63 [sc6]: screenshots/sc6.png
67 `xdotool` is used to emulate key strokes to set/unset locks on mouse clicks.
68 If you installed xdotool at a non-default location, please provide its full
69 path (e.g. /home/user/bin/xdotool) with this option.
71 If it is installed in your $PATH environment variable, or not installed at
72 all, leave this option blank.
74 ### Changing your mind
76 If you want to change these settings afterwards, simply run
78 sudo dpkg-reconfigure indicator-keyboard-led
80 and you will be prompted again.
84 The indicator should be shown at the top right corner, with a filled circle
85 representing a lock turned on and an unfilled circle representing a lock
88 Clicking on the indicator should result in a menu with the three locks.
89 Clicking on the menu item would cause the corresponding lock to toggle.
91 ## Known bugs / Troubleshooting
93 ### Pressing Scroll Lock does nothing
95 It seems to be a common problem that Scroll Lock is not usable in Ubuntu.
96 To solve this, do the following (assuming US keyboard):
98 > # backup your symbols file
99 > sudo cp /usr/share/X11/xkb/symbols/us{,.distribution}
101 > Add the following line in the `xkb_symbols "basic" {` section. Do not worry
102 > if that second line is not there, it is only there for some languages and
103 > was not there for us on my system.
106 > modifier_map Mod3 { Scroll_Lock }; <==<< Add this line
108 > include "level3(ralt_switch)" <==<< before this line
112 > You may have to do the same in your other layouts if you switch between
115 > Also, there is a cache where xkb layouts live. You should clear it before
116 > restarting your X server to check the new keyboard symbol file(s).
118 > sudo dpkg-reconfigure xkb-data
120 *By Pykler and Giovanni Toraldo on AskUbuntu.* [Source][quotesrc]. Slightly
121 modified. [Original source][origsrc] by dm+ on PCLinuxOS-Forums.
123 [origsrc]: http://www.pclinuxos.com/forum/index.php/topic,125690.msg1052201.html?PHPSESSID=2qsv83lve6dgd0ivq14bfcjc30#msg1052201
124 [quotesrc]: http://askubuntu.com/a/597757/274080
126 ### Scroll lock does not appear on indicator
128 Your installed GTK+ version is probably older than 3.18, which
129 does not support [`gdk_keymap_get_scroll_lock_state ()`][gtkdoc-scroll].
130 The earliest Ubuntu release that supports GTK+ 3.18 is 16.04 (Xenial).
131 If you use an older version, Scroll lock functionality will be disabled.
132 Please consider upgrading your system if you really want Scroll lock.
134 If your installed GTK+ is 3.18+ then please file a bug report.
136 [gtkdoc-scroll]: https://developer.gnome.org/gdk3/stable/gdk3-Keyboard-Handling.html#gdk-keymap-get-scroll-lock-state
138 ### Drop-down menu only has "Quit", the clickable locks do not appear
140 Please verify that xdotool is installed in your PATH with the executable
141 bit set. If you provided a custom path to xdotool please verify that it
142 is correct and is an executable regular file.
146 As motivated by Issue #1, this script has been localized to French (with
147 the assistance of Wikipedia and Google Translate). Corrections to the
148 translation, as well as translations to other languages, are welcome.
149 Feel free to create a pull request or open an issue.
151 ![indicator default, French locale][sc7]
152 Default appearance in a French locale.
154 [sc7]: screenshots/sc7.png
158 The program "indicator-keyboard-led.py" is released under the MIT License.
159 Please refer to the file for the full text of the license.
161 The icon "indicator-keyboard-led.svg" is released to the public domain.
165 I would like to thank [Tobias Schlitt](https://github.com/tobyS), who wrote
166 [indicator-chars](https://github.com/tobyS/indicator-chars) which I used
167 as a reference when writing this software.
169 The icon used in the indicator (indicator-keyboard-led.svg) is modified
170 from the file "emblem-readonly.svg" by
171 [Jakub Steiner](http://jimmac.musichall.cz)
172 who released it to the public domain for the
173 [Tango Icon Library](http://tango.freedesktop.org/Tango_Icon_Library).
179 I was a user of [indicator-keylock][ind-kl], but only one key lock can be shown
180 on the panel. I didn't like the Notify OSD events either.
182 I then came across [lks-indicator][lks] and [indicator-xbdmod][xbdmod], but
183 I didn't like the fact that they refresh the indicator on a regular time
184 interval (every *x* milliseconds) rather than on state changes (only when
185 the locks are toggled).
187 I also thought it would be fun to be able to toggle the locks on-screen.
189 [ind-kl]: https://launchpad.net/~tsbarnes/+archive/ubuntu/indicator-keylock
190 [lks]: https://github.com/SergKolo/lks-indicator
191 [xbdmod]: https://github.com/sneetsher/indicator-xkbmod