How to configure Deepin Desktop Environment (DDE) to change keyboard layout with caps lock?

Question

My system is Manjaro Linux. But I think this does not metter.
In settings panel I cannot make CapsLock as keyboard layout changer.
Please help.

Answer 1

Install ibus into your system.

Run it in some startup script: ibus-daemon -drx

Now little hack. When you bind Caps_Lock to change layout, case will be change too. To prevent it behavior, need map Caps option. A one solution: setxkbmap -option 'lv3:caps_switch_latch'

Go to ibus preferences to change required layouts and shortcuts. When your press Caps it was defined as ISO_Level3_Shift. All is done!

NOTE:

Edit /etc/X11/xorg.conf.d/00-keyboard.conf for persistent xkb option

Section "InputClass"
         Identifier "system-keyboard"
         MatchIsKeyboard "on"
         Option "XkbOptions"    "lv3:caps_switch_latch"
EndSection

---

UPD:

After time I found two other ways, based on independent hotkey listener. First approach use xbindkeys and xdotool, it have a lag.

; layout
(xbindkey '(release "c:66") "xdotool key Super_L+space")

Second via D-Bus instead xdotool, described it here

#!/bin/sh

LANG=$(dbus-send \
    --type=method_call \
    --print-reply=literal \
        --dest=com.deepin.daemon.InputDevices \
    /com/deepin/daemon/InputDevice/Keyboard \
    org.freedesktop.DBus.Properties.Get \
    string:"com.deepin.daemon.InputDevice.Keyboard" \
    string:"CurrentLayout" | awk '{print $2}')

if [[ $LANG = 'us;' ]]; then
    dbus-send \
        --type=method_call \
        --dest=com.deepin.daemon.InputDevices \
        /com/deepin/daemon/InputDevice/Keyboard \
        org.freedesktop.DBus.Properties.Set \
        string:"com.deepin.daemon.InputDevice.Keyboard" \
        string:"CurrentLayout" \
        variant:string:"ru;"
else
    dbus-send \
        --type=method_call \
        --dest=com.deepin.daemon.InputDevices \
        /com/deepin/daemon/InputDevice/Keyboard \
        org.freedesktop.DBus.Properties.Set \
        string:"com.deepin.daemon.InputDevice.Keyboard" \
        string:"CurrentLayout" \
        variant:string:"us;"
fi

Answer 2

Open dconf-editor, navigate to the switch-layout key for deepin (it should be /com/deepin/dde/keybinding/system/switch-layout) and set it to ['Caps_Lock']