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#
# Usage:
# ruby joy2.rb [n]
# n: if given, use n'th joystick
# if not given, show all connected joystick
#
require 'sdl'
White = [255,255,255]
def print_joystick_info
for i in 0..SDL::Joystick.num-1
print i,":",SDL::Joystick.indexName(0),"\n"
end
end
def display_button_state ( screen, joy )
for i in 0..joy.numButtons-1
if joy.button(i) then
screen.fillRect( i*30+30, 50, 10, 10, [0,0,128] )
else
screen.fillRect( i*30+30, 50, 10, 10, White )
end
end
end
def display_hat_state ( screen, joy )
# display the state of only first hat
if joy.numHats > 0 then
x = y = 0
x = 1 if ( joy.hat(0) & SDL::Joystick::HAT_RIGHT ) != 0
x = -1 if ( joy.hat(0) & SDL::Joystick::HAT_LEFT ) != 0
y = 1 if ( joy.hat(0) & SDL::Joystick::HAT_DOWN ) != 0
y = -1 if ( joy.hat(0) & SDL::Joystick::HAT_UP ) != 0
screen.fillRect( 450 + x*40, 200 + y*40, 10, 10, White )
end
end
def display_axis_state ( screen, joy )
for i in 0..joy.numAxes-1
screen.fillRect( i*30+130, joy.axis(i)*100/32768+200, 20, 20, White )
end
end
SDL.init( SDL::INIT_VIDEO|SDL::INIT_JOYSTICK )
screen = SDL::setVideoMode(640, 480, 16, SDL::SWSURFACE)
if SDL::Joystick.num == 0 then
print "No joystick available\n"
exit
end
if ARGV.size == 0 then
print_joystick_info
exit
end
joynum = ARGV[0].to_i
if SDL::Joystick.num < joynum then
print "Joystick No.#{joynum} is not available\n"
exit
end
joy=SDL::Joystick.open(joynum)
while true
while event = SDL::Event2.poll
case event
when SDL::Event2::KeyDown, SDL::Event2::Quit
exit
end
end
SDL::Joystick.updateAll
screen.fillRect(0,0,640,480,0)
display_button_state screen, joy
display_hat_state screen, joy
display_axis_state screen, joy
screen.updateRect(0, 0, 0, 0)
end
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