setop/python-escpos
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Merge remote-tracking branch 'origin/development' into capabilities

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This commit is contained in:
Michael Elsdörfer
2016-08-30 13:04:17 +02:00
parent 5fa89ff685 cbe38648f5
commit ea7769f8b2
6 changed files with 97 additions and 8 deletions
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21
src/escpos/constants.py
View File

@@ -55,11 +55,18 @@ _CUT_PAPER = lambda m: GS + b'V' + m
PAPER_FULL_CUT = _CUT_PAPER(b'\x00') # Full cut paper
PAPER_PART_CUT = _CUT_PAPER(b'\x01') # Partial cut paper
# Beep
BEEP = b'\x07'
# Panel buttons (e.g. the FEED button)
_PANEL_BUTTON = lambda n: ESC + b'c5' + six.int2byte(n)
PANEL_BUTTON_ON = _PANEL_BUTTON(0) # enable all panel buttons
PANEL_BUTTON_OFF = _PANEL_BUTTON(1) # disable all panel buttons
# Sheet modes
SHEET_SLIP_MODE = ESC + b'\x63\x30\x04' # slip paper
SHEET_ROLL_MODE = ESC + b'\x63\x30\x01' # paper roll
# Text format
# TODO: Acquire the "ESC/POS Application Programming Guide for Paper Roll
# Printers" and tidy up this stuff too.
@@ -104,6 +111,18 @@ SET_FONT = lambda n: ESC + b'\x4d' + n
TXT_FONT_A = SET_FONT(b'\x00') # Font type A
TXT_FONT_B = SET_FONT(b'\x01') # Font type B
# Text colors
TXT_COLOR_BLACK = ESC + b'\x72\x00' # Default Color
TXT_COLOR_RED = ESC + b'\x72\x01' # Alternative Color (Usually Red)
# Spacing
LINESPACING_RESET = ESC + b'2'
LINESPACING_FUNCS = {
60: ESC + b'A', # line_spacing/60 of an inch, 0 <= line_spacing <= 85
360: ESC + b'+', # line_spacing/360 of an inch, 0 <= line_spacing <= 255
180: ESC + b'3', # line_spacing/180 of an inch, 0 <= line_spacing <= 255
}
# Char code table
CHARCODE_PC437 = ESC + b'\x74\x00' # USA: Standard Europe
CHARCODE_JIS = ESC + b'\x74\x01' # Japanese Katakana
@@ -189,7 +208,7 @@ QR_ECLEVEL_L = 0
QR_ECLEVEL_M = 1
QR_ECLEVEL_Q = 2
QR_ECLEVEL_H = 3
# QRcode models
QR_MODEL_1 = 1
QR_MODEL_2 = 2

29
src/escpos/escpos.py
View File

@@ -585,6 +585,35 @@ class Escpos(object):
else:
self._raw(TXT_INVERT_OFF)
def line_spacing(self, spacing=None, divisor=180):
""" Set line character spacing.
If no spacing is given, we reset it to the default.
There are different commands for setting the line spacing, using
a different denominator:
'+'' line_spacing/360 of an inch, 0 <= line_spacing <= 255
'3' line_spacing/180 of an inch, 0 <= line_spacing <= 255
'A' line_spacing/60 of an inch, 0 <= line_spacing <= 85
Some printers may not support all of them. The most commonly
available command (using a divisor of 180) is chosen.
"""
if spacing is None:
self._raw(LINESPACING_RESET)
return
if divisor not in LINESPACING_FUNCS:
raise ValueError("divisor must be either 360, 180 or 60")
if (divisor in [360, 180] \
and (not(0 <= spacing <= 255))):
raise ValueError("spacing must be a int between 0 and 255 when divisor is 360 or 180")
if divisor == 60 and (not(0 <= spacing <= 85)):
raise ValueError("spacing must be a int between 0 and 85 when divisor is 60")
self._raw(LINESPACING_FUNCS[divisor] + six.int2byte(spacing))
def cut(self, mode=''):
""" Cut paper.