Dois focos no X Windows - xorg

É possível ter dois focos / focos diferentes no X windows? (Basicamente usando dois mouses e teclados com uma máquina física simultaneamente. Se sim, como isso é feito?

Respostas:

Com servidores Xorg recentes, sim. Você precisa usar o XInput Extension versão 2.0 ou mais recente. Você também precisará de um gerenciador de janelas capaz de fazer isso, e eu não sei qual dos WMs modernos já pode fazer isso.

Documentação:

• http://cgit.freedesktop.org/xorg/proto/inputproto/
• http://cgit.freedesktop.org/xorg/lib/libXi/
• http://who-t.blogspot.com/ (ele é o cara que escreveu tudo isso, o blog dele está cheio de coisas para aprender)

No Debian Testing eu posso até obter dois ponteiros e começar a usá-los agora (um controlado pelo mouse USB e o outro pelo touchpad):

pzanoni@vicky:~$ xinput --list
⎡ Virtual core pointer                      id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ USB Optical Mouse                         id=11   [slave  pointer  (2)]
⎜   ↳ SynPS/2 Synaptics TouchPad                id=13   [slave  pointer  (2)]
⎜   ↳ TPPS/2 IBM TrackPoint                     id=14   [slave  pointer  (2)]
⎣ Virtual core keyboard                     id=3    [master keyboard (2)]
↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
↳ Power Button                              id=6    [slave  keyboard (3)]
↳ Video Bus                                 id=7    [slave  keyboard (3)]
↳ Sleep Button                              id=8    [slave  keyboard (3)]
↳ Lite-On Technology USB Productivity Option Keyboard( has the hub in # 1 )     id=9    [slave  keyboard (3)]
↳ Lite-On Technology USB Productivity Option Keyboard( has the hub in # 1 )     id=10   [slave  keyboard (3)]
↳ AT Translated Set 2 keyboard              id=12   [slave  keyboard (3)]
↳ ThinkPad Extra Buttons                    id=15   [slave  keyboard (3)]
↳ ACPI Virtual Keyboard Device              id=16   [slave  keyboard (3)]
pzanoni@vicky:~$ xinput --create-master my 1 1
pzanoni@vicky:~$ xinput --list
⎡ Virtual core pointer                      id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ USB Optical Mouse                         id=11   [slave  pointer  (2)]
⎜   ↳ SynPS/2 Synaptics TouchPad                id=13   [slave  pointer  (2)]
⎜   ↳ TPPS/2 IBM TrackPoint                     id=14   [slave  pointer  (2)]
⎣ Virtual core keyboard                     id=3    [master keyboard (2)]
↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
↳ Power Button                              id=6    [slave  keyboard (3)]
↳ Video Bus                                 id=7    [slave  keyboard (3)]
↳ Sleep Button                              id=8    [slave  keyboard (3)]
↳ Lite-On Technology USB Productivity Option Keyboard( has the hub in # 1 )     id=9    [slave  keyboard (3)]
↳ Lite-On Technology USB Productivity Option Keyboard( has the hub in # 1 )     id=10   [slave  keyboard (3)]
↳ AT Translated Set 2 keyboard              id=12   [slave  keyboard (3)]
↳ ThinkPad Extra Buttons                    id=15   [slave  keyboard (3)]
↳ ACPI Virtual Keyboard Device              id=16   [slave  keyboard (3)]
⎡ my pointer                                id=17   [master pointer  (18)]
⎜   ↳ my XTEST pointer                          id=19   [slave  pointer  (17)]
⎣ my keyboard                               id=18   [master keyboard (17)]
↳ my XTEST keyboard                         id=20   [slave  keyboard (18)]
pzanoni@vicky:~$ xinput --reattach "SynPS/2 Synaptics TouchPad" "my pointer"