Non blocking keypress reading?

[Sard Aukary]

On Windows XP is there a way to test that a certain key has been pressed
without blocking?

I’ve tried using curses but it blocks the current thread and any other
thread until a key is pressed.


I want to give the user 10 seconds so make a selection before a default
action is taken.

Here is the test code I’ve got;


require 'curses'
include Curses
init_screen
noecho
trap(0) { echo }

t1 = Time.new
Thread.new do

#example timer thread
while(true) do
x = Time.new - t1
h = 3+3
setpos(12,10)

addstr("#{x}")

end
end

setpos(1,5)
addstr("Please select your location")
setpos(3,5)
addstr(" 1 - Work")
setpos(4,5)
addstr(" 2 - Home")
setpos(6,5)
addstr("Esc - Exit")
while (c = getch) != ?\e do
# check what key is pressed and do stuff
end

 

[William Crawford]

On Windows XP is there a way to test that a certain key has been pressed
without blocking?

From my quick search, I didn't find a way. Maybe this will help though?

http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-core/4435

 

[Jan Svitok]

On Windows XP is there a way to test that a certain key has been pressed
without blocking?

I've tried using curses but it blocks the current thread and any other
thread until a key is pressed.


I want to give the user 10 seconds so make a selection before a default
action is taken.

Here is the test code I've got;


require 'curses'
include Curses
init_screen
noecho
trap(0) { echo }

t1 = Time.new
Thread.new do

#example timer thread
while(true) do
x = Time.new - t1
h = 3+3
setpos(12,10)

addstr("#{x}")

end
end

setpos(1,5)
addstr("Please select your location")
setpos(3,5)
addstr(" 1 - Work")
setpos(4,5)
addstr(" 2 - Home")
setpos(6,5)
addstr("Esc - Exit")
while (c = getch) != ?\e do
# check what key is pressed and do stuff
end

search the archive for kbhit

 

[Michael Fellinger]

On Windows XP is there a way to test that a certain key has been pressed
without blocking?

I=E2=80=99ve tried using curses but it blocks the current thread and any = other
thread until a key is pressed.


I want to give the user 10 seconds so make a selection before a default
action is taken.

require 'timeout'
begin
=C2=A0 Timeout.timeout(10) do
=C2=A0 =C2=A0 key =3D gets
=C2=A0 end
rescue Timeout::Error
=C2=A0 key =3D default
end

Here is the test code I=E2=80=99ve got;


require 'curses'
include Curses
init_screen
noecho
trap(0) { echo }

t1 =3D Time.new
Thread.new do

#example timer thread
while(true) do
x =3D Time.new - t1
h =3D 3+3
setpos(12,10)

addstr("#{x}")

end
end

setpos(1,5)
addstr("Please select your location")
setpos(3,5)
addstr(" 1 - Work")
setpos(4,5)
addstr(" 2 - Home")
setpos(6,5)
addstr("Esc - Exit")
while (c =3D getch) !=3D ?\e do
# check what key is pressed and do stuff
end

=2D-=20
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