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I've created two functions, scroll-window-up and scroll-window-down, and want to add these to ace-window's dispatch list:

(add-to-list 'aw-dispatch-alist
             '(?S gpolonkai/scroll-window-down " Scroll window down"))
(add-to-list 'aw-dispatch-alist
             '(?s gpolonkai/scroll-window-up " Scroll window up"))

When I press s in dispatch time, the selected window scrolls up,but for S it says there is no such candidate. I remember it worked on my other machine, so there may be some differences in how the two OS handles keys. If I'm right, is there a more reliable way to distinguish between upper and lower case characters? If not, can I specify C-s or M-s where it needs a character?

Edit: it seems I messed up a bit… the error message I get when pressing S is:

Args out of range: "S", 0, 5
  • Which two OS's are you dealing with? Upper and lower case letters work for me. – glucas Feb 23 '17 at 22:40
  • Windows and Fedora Linux. And it turns out the same problem exists on my Android phone with Termux. – GergelyPolonkai Feb 23 '17 at 22:42
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I'm not sure why S might not be working for you, but you can use a modifier key.

Try this: invoke ace-window, and hit for example C-s at the dispatch prompt. The error message actually tells you what character was sent, e.g.

No such candidate, 19

You can use that to add C-s to your dispatch list:

(add-to-list 'aw-dispatch-alist '(19 some-command " Do Something"))
  • You may be able to get S working the same way, i.e. use the number reported in the "no such candidate" message you are seeing to define the dispatch command. – glucas Feb 23 '17 at 22:51
  • Thanks for the C-s workaround! It works fine, although I hope I will get an answer less hacky. I corrected my question as it seems I messed it up a bit. Sorry about that. – GergelyPolonkai Feb 23 '17 at 22:51

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