Usual keycodes

[Petr M. <mi...@ph...>]

Currently, interactive terminals map keycodes to ascii values of 'a' .. 'Z',
or to values above 1000, like:

enum {
    GP_FIRST_KEY = 1000,
    GP_BackSpace,
    GP_Tab,
    GP_Linefeed,
    ...
}

The enclosed patch splits this group of "gnuplot" keycodes into two groups:

1. group with "usual keycodes",
2. group with "other keycodes" (=what remains after removing "usual
   keycodes").


There are the following "usual" keycodes:
    GP_BackSpace = 0x08,
    GP_Tab = 0x09,
    GP_Return = 0x0D,
    GP_Escape = 0x1B,
    GP_Delete = 127,

Do you notice yet other keycode is missing?

The patch does effect any current functionality, but helps together with
Ethan's "pause mouse key" implementation such as
"mousekeys_17may2004.patch", where command "pause mouse key; show var"
returns something you expect from DOS keycodes and mainly for compatibility
to ginput.m in Octave.

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PM