is there a way that makes emacs recognize key hold

Hi guys, hope you all doing fine. I was wondering about a way that makes emacs recognize a key hold, so can i for example create a program that for example when the space bar is pressed and hold then i press another key with it, it would send some Unicode character that i dont use or such a program is impossible. I'm sorry i have no idea about the topic so excuse my ignorance i use ubuntu 20.04 by the way.

Would be nice, could implement hold ctrl and press tab for cycling through buffers.

> Would be nice, could implement hold ctrl and press tab for cycling through buffers. (define-key global-map [C-tab] #'next-buffer) But it's a bad idea. Minor modes might redefine the tab (for example Yasnippet) and they will have precedence over global tab so it won't work that well.

Can't hold down and repeat press to cycle (like in intellij idea) and release to select.

> Can't hold down and repeat press to cycle Have you tried? You can keep Ctrl pressed with pinky and press as many different keys as you prefer. When I press C-x C-f I don't move my pinky off the Ctrl key. Same with C-tab. Press Ctrl and keep it pressed, while you press tab repeatedly. But I wouldn't use it, as said, it will clash with some minor modes and might be confusing. > (like in intellij idea) and release to select I have never used intellij so I have no idea what you are talking about there.

No. Emacs only recognizes key chords if they use one of the built-in modifiers -- shift, control, meta, alt, super, or hyper. You can't chord two arbitrary keys. You could use lower-level X11 key mapping to change a key to one of the less-used modifiers, and bind ex. Alt-Space to do what you want. You could also get a mechanical keyboard which runs QMK, which opens up a lot of possibilities for macros and chording.

You want https://github.com/kmonad/kmonad.

Makes me think of this: https://xkcd.com/1172/

You could either use the mouse because it recognizes a press as opposed to a click, or use timers to detect if another key in a window has been pressed this used to detect key cords, an example might be which key.