When using a program like htop - mouse scroll wheel action will not do anything.
How can I reproduce such behavior in my Bash script?
I guess there should be a way to tell the terminal to ignore scrolling requests. How is that done?
1
-
htop isn't a bash script, is a ncurses app AFAIK – AnonymousLurker Nov 26 '18 at 16:53
-
You can do it with ncurses. I don't know what bash tools are available, but it is possible. – ctrl-alt-delor Nov 26 '18 at 16:58
-
this may be relevant stackoverflow.com/q/10576401/537980 – ctrl-alt-delor Nov 26 '18 at 17:00
2
htop happens to use ncurses
ncurses (and other things that use the full screen in a terminal) initializes the terminal using the terminfo capability smcup. For xterm (and terminal emulators that imitate it), that switches to the alternate screen. Those terminals may respond to a wheel mouse by sending up/down cursor keys instead of scrolling the terminal window (which you would see in htop by the focus-line moving up/down). Your bash script may see those cursor keys, but not handle them.
You can experiment with the feature in a script using
tput smcup
to switch to the alternate screen, and
tput rmcup
to switch back to the normal screen.
