xorg - X Windows 上的两个焦点

Question

是否可以在 X 窗口上有两个不同的焦点/焦点？（基本上是在一台物理机上同时使用两个鼠标和键盘。如果是这样，这是如何实现的？

Answer 1

对于最近的 Xorg 服务器，是的。您需要使用 XInput Extension 2.0 或更高版本。您还需要一个能够做到这一点的窗口管理器，我不确定哪个现代 WM 已经可以做到这一点。

文档：

• http://cgit.freedesktop.org/xorg/proto/inputproto/
• http://cgit.freedesktop.org/xorg/lib/libXi/
• http://who-t.blogspot.com/（他是写所有这些东西的人，他的博客充满了要学习的东西）

在 Debian 测试中，我什至可以得到两个指针并立即开始使用它们（一个由 USB 鼠标控制，另一个由触摸板控制）：

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"