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93 lines
2.0 KiB
93 lines
2.0 KiB
6 years ago
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#!/usr/bin/env python
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import os
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import sys
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import termios
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import atexit
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from select import select
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class KBHit:
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def __init__(self):
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'''Creates a KBHit object that you can call to do various keyboard things.
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'''
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self.set_kbhit_terminal()
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def set_kbhit_terminal(self):
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# Save the terminal settings
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self.fd = sys.stdin.fileno()
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self.new_term = termios.tcgetattr(self.fd)
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self.old_term = termios.tcgetattr(self.fd)
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# New terminal setting unbuffered
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self.new_term[3] = (self.new_term[3] & ~termios.ICANON & ~termios.ECHO)
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termios.tcsetattr(self.fd, termios.TCSAFLUSH, self.new_term)
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# Support normal-terminal reset at exit
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atexit.register(self.set_normal_term)
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def set_normal_term(self):
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''' Resets to normal terminal. On Windows this is a no-op.
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'''
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if os.name == 'nt':
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pass
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else:
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termios.tcsetattr(self.fd, termios.TCSAFLUSH, self.old_term)
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def getch(self):
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''' Returns a keyboard character after kbhit() has been called.
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Should not be called in the same program as getarrow().
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'''
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return sys.stdin.read(1)
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def getarrow(self):
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''' Returns an arrow-key code after kbhit() has been called. Codes are
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0 : up
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1 : right
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2 : down
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3 : left
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Should not be called in the same program as getch().
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'''
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if os.name == 'nt':
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msvcrt.getch() # skip 0xE0
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c = msvcrt.getch()
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vals = [72, 77, 80, 75]
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else:
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c = sys.stdin.read(3)[2]
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vals = [65, 67, 66, 68]
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return vals.index(ord(c.decode('utf-8')))
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def kbhit(self):
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''' Returns True if keyboard character was hit, False otherwise.
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'''
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dr,dw,de = select([sys.stdin], [], [], 0)
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return dr != []
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# Test
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if __name__ == "__main__":
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kb = KBHit()
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print('Hit any key, or ESC to exit')
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while True:
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if kb.kbhit():
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c = kb.getch()
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if ord(c) == 27: # ESC
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break
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print(c)
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kb.set_normal_term()
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