On Wed, Jun 18, 2008 at 08:30:00AM -0500, Samir Unni wrote: > Hi, > > I'm trying to figure out how to set a keybinding for "switch the input focus > to the previous region" as C-a shift-tab. However, the "Default Key > Bindings" section on the man page doesn't show any examples of the syntax > for using modifier keys other than control that I can base my custom key > binding off of. So I have 2 questions about custom keybindings: > > 1. Is "switch the input focus to the previous region" a possible action > to bind a key to? I'm using the CVS version of screen, and due to the > support for vertical splitting, I frequently end up with 4 or 5 terminals > in > one screen session. It's very frustrating to have to C-a tab 3 or 4 times > to > get to the previous terminal, when I'm switching between two of those 4 or > 5 > terminals a lot in a short period of time.
From the manual: -- Command: focus (`C-a <Tab>') Move the input focus to the next region. This is done in a cyclic way so that the top region is selected after the bottom one. If no subcommand is given it defaults to `down'. `up' cycles in the opposite order, `top' and `bottom' go to the top and bottom region respectively. Useful bindings are (j and k as in vi) bind j focus down bind k focus up bind t focus top bind b focus bottom > 2. Is it even possible to set a key binding with a modifier key other > than control? [...] Typically no. The interaction between screen and the terminal is via characters. When you press a key or combination of keys, the terminal sends one or more characters that an application like screen can read. When you press <Ctrl-A>, it sends the ^A (0x1) character, when you press <Alt-A> it sends either ESC (0x2b) and a or a with the eighth bit set depending on the version of the terminal. When you press <Shift-A>, it sends A instead of a... and so on. Now, for the <Fx> or <PgDwn>, <Tab>... keys, you'll find that some terminals do send different character sequences when <Shift> or <Ctrl> is pressed. It's worth checking. When not in screen, try <Ctrl-V> followed by the key combination to see what you get. For instance, here, <Shift-Tab> sends ^[[Z (the 3 characters ESC [ Z), so that I could bind that to "focus up" if I wanted to. And actually, it's done by default here. Because the terminfo entry for my terminal has: $ infocmp -1L xterm-256color | grep -i back_tab back_tab=\E[Z, And "focus up" is bound to kB (which is the termcap name for backtab) in screen by default. -- Stéphane _______________________________________________ screen-users mailing list screen-users@gnu.org http://lists.gnu.org/mailman/listinfo/screen-users