I read the reference of the pygame.key module and found that the control code of Escape is indeed what is received at the RPi side, though not very sure, the ^[. I thought perhaps I could press ^, then [, but it does not work either. So I gave up for now.
I am thinking of playing with the key codes later.
.END
pygame.key - pygame module to work with the keyboard
http://www.pygame.org/docs/ref/key.html
pygame.key.get_focused — true if the display is receiving keyboard input from the system
pygame.key.get_pressed — get the state of all keyboard buttons
pygame.key.get_mods — determine which modifier keys are being held
pygame.key.set_mods — temporarily set which modifier keys are pressed
pygame.key.set_repeat — control how held keys are repeated
pygame.key.get_repeat — see how held keys are repeated
pygame.key.name — get the name of a key identifier
This module contains functions for dealing with the keyboard.
The event queue gets pygame.KEYDOWN and pygame.KEYUP events when the keyboard buttons are pressed and released. Both events have a key attribute that is a integer id representing every key on the keyboard.
The pygame.KEYDOWN event has an additional attributes unicode, and scancode. unicode represents a single character string that is the fully translated character entered. This takes into account the shift and composition keys. scancode represents the platform specific key code. This could be different from keyboard to keyboard, but is useful for key selection of weird keys like the multimedia keys.
There are many keyboard constants, they are used to represent keys on the keyboard. The following is a list of all keyboard constants
KeyASCII ASCII Common Name
K_BACKSPACE \b backspace
K_TAB \t tab
K_CLEAR clear
K_RETURN \r return
K_PAUSE pause
K_ESCAPE ^[ escape
K_SPACE space
K_EXCLAIM ! exclaim
K_QUOTEDBL " quotedbl
K_HASH # hash
K_DOLLAR $ dollar
K_AMPERSAND & ampersand
K_QUOTE quote
K_LEFTPAREN ( left parenthesis
K_RIGHTPAREN ) right parenthesis
K_ASTERISK * asterisk
K_PLUS + plus sign
K_COMMA , comma
K_MINUS - minus sign
K_PERIOD . period
K_SLASH / forward slash
K_0 0 0
K_1 1 1
K_2 2 2
K_3 3 3
K_4 4 4
K_5 5 5
K_6 6 6
K_7 7 7
K_8 8 8
K_9 9 9
K_COLON : colon
K_SEMICOLON ; semicolon
K_LESS < less-than sign
K_EQUALS = equals sign
K_GREATER > greater-than sign
K_QUESTION ? question mark
K_AT @ at
K_LEFTBRACKET [ left bracket
K_BACKSLASH \ backslash
K_RIGHTBRACKET ] right bracket
K_CARET ^ caret
K_UNDERSCORE _ underscore
K_BACKQUOTE ` grave
K_a a a
K_b b b
K_c c c
K_d d d
K_e e e
K_f f f
K_g g g
K_h h h
K_i i i
K_j j j
K_k k k
K_l l l
K_m m m
K_n n n
K_o o o
K_p p p
K_q q q
K_r r r
K_s s s
K_t t t
K_u u u
K_v v v
K_w w w
K_x x x
K_y y y
K_z z z
K_DELETE delete
K_KP0 keypad 0
K_KP1 keypad 1
K_KP2 keypad 2
K_KP3 keypad 3
K_KP4 keypad 4
K_KP5 keypad 5
K_KP6 keypad 6
K_KP7 keypad 7
K_KP8 keypad 8
K_KP9 keypad 9
K_KP_PERIOD . keypad period
K_KP_DIVIDE / keypad divide
K_KP_MULTIPLY * keypad multiply
K_KP_MINUS - keypad minus
K_KP_PLUS + keypad plus
K_KP_ENTER \r keypad enter
K_KP_EQUALS = keypad equals
K_UP up arrow
K_DOWN down arrow
K_RIGHT right arrow
K_LEFT left arrow
K_INSERT insert
K_HOME home
K_END end
K_PAGEUP page up
K_PAGEDOWN page down
K_F1 F1
K_F2 F2
K_F3 F3
K_F4 F4
K_F5 F5
K_F6 F6
K_F7 F7
K_F8 F8
K_F9 F9
K_F10 F10
K_F11 F11
K_F12 F12
K_F13 F13
K_F14 F14
K_F15 F15
K_NUMLOCK numlock
K_CAPSLOCK capslock
K_SCROLLOCK scrollock
K_RSHIFT right shift
K_LSHIFT left shift
K_RCTRL right ctrl
K_LCTRL left ctrl
K_RALT right alt
K_LALT left alt
K_RMETA right meta
K_LMETA left meta
K_LSUPER left windows key
K_RSUPER right windows key
K_MODE mode shift
K_HELP help
K_PRINT print screen
K_SYSREQ sysrq
K_BREAK break
K_MENU menu
K_POWER power
K_EURO euro
The keyboard also has a list of modifier states that can be assembled bit bitwise ORing them together.
KMOD_NONE, KMOD_LSHIFT, KMOD_RSHIFT, KMOD_SHIFT, KMOD_CAPS,
KMOD_LCTRL, KMOD_RCTRL, KMOD_CTRL, KMOD_LALT, KMOD_RALT,
KMOD_ALT, KMOD_LMETA, KMOD_RMETA, KMOD_META, KMOD_NUM, KMOD_MODE
pygame.key.get_focused()
true if the display is receiving keyboard input from the system
get_focused() -> bool
This is true when the display window has keyboard focus from the system. If the display needs to ensure it does not lose keyboard focus, it can use pygame.event.set_grab() to grab all input.
pygame.key.get_pressed()
get the state of all keyboard buttons
get_pressed() -> bools
Returns a sequence of boolean values representing the state of every key on the keyboard. Use the key constant values to index the array. A True value means the that button is pressed.
Getting the list of pushed buttons with this function is not the proper way to handle text entry from the user. You have no way to know the order of keys pressed, and rapidly pushed keys can be completely unnoticed between two calls to pygame.key.get_pressed(). There is also no way to translate these pushed keys into a fully translated character value. See the pygame.KEYDOWN events on the event queue for this functionality.
pygame.key.get_mods()
determine which modifier keys are being held
get_mods() -> int
Returns a single integer representing a bitmask of all the modifier keys being held. Using bitwise operators you can test if specific shift keys are pressed, the state of the capslock button, and more.
pygame.key.set_mods()
temporarily set which modifier keys are pressed
set_mods(int) -> None
Create a bitmask of the modifier constants you want to impose on your program.
pygame.key.set_repeat()
control how held keys are repeated
set_repeat() -> None
set_repeat(delay, interval) -> None
When the keyboard repeat is enabled, keys that are held down will generate multiple pygame.KEYDOWN events. The delay is the number of milliseconds before the first repeated pygame.KEYDOWN will be sent. After that another pygame.KEYDOWN will be sent every interval milliseconds. If no arguments are passed the key repeat is disabled.
When pygame is initialized the key repeat is disabled.
pygame.key.get_repeat()
see how held keys are repeated
get_repeat() -> (delay, interval)
When the keyboard repeat is enabled, keys that are held down will generate multiple pygame.KEYDOWN events. The delay is the number of milliseconds before the first repeated pygame.KEYDOWN will be sent. After that another pygame.KEYDOWN will be sent every interval milliseconds.
When pygame is initialized the key repeat is disabled.
New in pygame 1.8.
pygame.key.name()
get the name of a key identifier
name(key) -> string
Get the descriptive name of the button from a keyboard button id constant.
indexnext |previous |Pygame v1.9.2 documentation »
*** key functions ***
for event in pygame.event.get():
if event.type is pygame.QUIT:
return False
if event.type is pygame.KEYDOWN:
keyname = pygame.key.name(event.key)
if event.key == pygame.K_ESCAPE:
cons.watchkeys['escape'] = 1
if keyname == 'left':
cons.watchkeys['left'] = 1
if keyname == 'right':
cons.watchkeys['right'] = 1
if keyname == 'up':
cons.watchkeys['up'] = 1
if keyname == 'down':
cons.watchkeys['down'] = 1
if event.key == pygame.K_w:
cons.watchkeys['w'] = 1
if event.key == pygame.K_a:
cons.watchkeys['a'] = 1
if event.key == pygame.K_s:
cons.watchkeys['s'] = 1
if event.key == pygame.K_d:
cons.watchkeys['d'] = 1
if event.key == pygame.K_z:
cons.watchkeys['z'] = 1
if event.key == pygame.K_x:
cons.watchkeys['x'] = 1
if event.key == pygame.K_SPACE:
cons.watchkeys['space'] = 1
if event.key == pygame.K_1:
cons.watchkeys['1'] = 1
if event.key == pygame.K_2:
cons.watchkeys['2'] = 1
if event.key == pygame.K_3:
cons.watchkeys['3'] = 1
if event.key == pygame.K_LALT or event.key == pygame.K_RALT:
cons.watchkeys['alt'] = 1
if event.key == pygame.K_RETURN:
cons.watchkeys['enter'] = 1
if event.key == pygame.K_TAB:
cons.watchkeys['tab'] = 1
if event.key == pygame.K_LSHIFT or event.key == pygame.K_RSHIFT:
cons.watchkeys['shift'] = 1
if event.key == pygame.K_LCTRL:
cons.watchkeys['control'] = 1
if event.key == pygame.K_F4:
cons.watchkeys['f4'] = 1
if event.key == pygame.K_F11:
cons.watchkeys['f11'] = 1
if event.key == pygame.K_c:
cons.watchkeys['c'] = 1
if event.key == pygame.K_PRINT:
Tools.screenshotThis()
if event.type is pygame.KEYUP:
keyname = pygame.key.name(event.key)
if event.key == pygame.K_ESCAPE:
cons.watchkeys['escape'] = 0
if keyname == 'left':
cons.watchkeys['left'] = 0
if keyname == 'right':
cons.watchkeys['right'] = 0
if keyname == 'up':
cons.watchkeys['up'] = 0
if keyname == 'down':
cons.watchkeys['down'] = 0
if event.key == pygame.K_w:
cons.watchkeys['w'] = 0
if event.key == pygame.K_a:
cons.watchkeys['a'] = 0
if event.key == pygame.K_s:
cons.watchkeys['s'] = 0
if event.key == pygame.K_d:
cons.watchkeys['d'] = 0
if event.key == pygame.K_z:
cons.watchkeys['z'] = 0
if event.key == pygame.K_x:
cons.watchkeys['x'] = 0
if event.key == pygame.K_SPACE:
cons.watchkeys['space'] = 0
if event.key == pygame.K_0:
cons.watchkeys['0'] = 0
if event.key == pygame.K_2:
cons.watchkeys['2'] = 0
if event.key == pygame.K_3:
cons.watchkeys['3'] = 0
if event.key == pygame.K_LALT or event.key == pygame.K_RALT:
cons.watchkeys['alt'] = 0
if event.key == pygame.K_RETURN:
cons.watchkeys['enter'] = 0
if event.key == pygame.K_TAB:
cons.watchkeys['tab'] = 0
if event.key == pygame.K_LSHIFT or event.key == pygame.K_RSHIFT:
cons.watchkeys['shift'] = 0
if event.key == pygame.K_LCTRL:
cons.watchkeys['control'] = 0
if event.key == pygame.K_F4:
cons.watchkeys['f4'] = 0
if event.key == pygame.K_F11:
cons.watchkeys['f11'] = 0
if event.key == pygame.K_c:
cons.watchkeys['c'] = 0
*** Key codes ***
ESC key - ^[ means Control-LeftSquareBracket which is ASCII 27 which is ESC
ESC => ^[
up => ^[OA
down => ^[OB
right => ^[OC
left => ^[OD
home => ^[[1~
end => ^[[4~
F1 => ^[[11~
F12 => ^[[24~
.END
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