keysyms are values that are recognized by Tk as names for certain keys. They are, for the most part, borrowed from X.
A keysym can be used with [bind] to indicate a particular key.
bind . <KeyPress> {puts %K}Then press any key or key combination to learn the keysym for your desired key binding.
Corresponding Tkinter script:
from Tkinter import *
class Output(Label):
def printkey(self, event):
self.config(text=event.keysym)
root = Tk()
label = Label(root, text='Press a key...')
output = Output(root, takefocus=1)
label.pack()
output.pack()
output.focus()
output.bind('<KeyPress>', output.printkey)
root.mainloop() Now you know why we use Tcl instead of Python!
fisheggs 2008-01-26:
To be fair, you're comparing an apple to an Orange Glazed Coffee Cake. So this is the Deep Dish Apple Pie version of the tcl example.
package require snit
::snit::widgetadaptor Output {
constructor {args} {
installhull using label
$self configurelist $args
}
method printkey {event} {
# I really should have created a ::snit::type that collected all
# the event values and made them available as instance variables
# and passed that in here, but to keep it simple....
$self config -text $event
}
delegate method * to hull
delegate option * to hull
}
label .label -text "Press a key..."
Output .output -takefocus 1
pack .label
pack .output
focus .output
bind .output <KeyPress> {.output printkey %K}PYK 2013-11-28: Now you know why we don't use snit!
CLN 2001-06-11: Is there any way to use accented characters (as used in many European languages) in bindings? I want, for example, Alt-e' (meant to be Alt pressed with an accented e) to be bound to a command.
Peter Lewerin 2001-06-30:
bind . <Alt-Key-eacute> ...
would seem to do what you want, but possibly only if you actually have a é key to press. At least for me, characters composed with dead keys don't fire the bindings, but character keys (e.g. adiaeresis on my keyboard) do.
Every key on a physical keyboard is assigned a number between 0 and 255. This is callled the keycode. The keycode is the unique identifier for the key, and no more than that, and has nothing really to do with human-language characters. A keysym, however, is very often either the character itself or something that a human would immediately recognize as indicating a certain character or key, e.g., "space".
Mo Dejong included in the Tk test suite keypress-pertinent code. He advises, "See the following procs in tk/tests/event.test:
With these commands you can do the following:
_keypress_string $w HELLO\n
This will generate a keypress for each letter followed by an event for the return key.
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