Global shortcut hook on linux
Global shortcut term means that you can set certain operation on some keyboard combination wherever you are in the system.
When you are a programmer on Windows and want to implement some feature on Linux it almost always makes you angry. Just because they are very different systems. In this article, I'll tell about how to implement global hotkeys on Linux. Maybe I'll save your time :)
Where to start
In Unix systems, there is no internal hook system for a keyboard. So you can't just register / unregister global hotkey. But on Linux, you can use XServer to implement the hook
In common we need two functions:
XUngrabKey. Our program has to
monitor the state of a keyboard. And it will do it in a while-cycle so we have to create also thread for this
Also, you might want to make the code more universal. In that case, we'll create an extended class of
TThread with our needs.
And now we can use our unit like this: