setop/python-escpos
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Preliminary support of pos 'line display' printing

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This commit is contained in:
TAHRI Ahmed
2016-11-15 16:24:44 +01:00
committed by Patrick Kanzler
parent a6e1d0df00
commit 1f427953a8
3 changed files with 76 additions and 0 deletions
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5
src/escpos/constants.py
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@@ -64,6 +64,11 @@ _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
# Line display printing
LINE_DISPLAY_OPEN = ESC + b'\x3d\x02'
LINE_DISPLAY_CLEAR = ESC + b'\x40'
LINE_DISPLAY_CLOSE = ESC + b'\x3d\x01'
# Sheet modes
SHEET_SLIP_MODE = ESC + b'\x63\x30\x04' # slip paper
SHEET_ROLL_MODE = ESC + b'\x63\x30\x01' # paper roll

36
src/escpos/escpos.py
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@@ -26,6 +26,7 @@ from .constants import BARCODE_TXT_OFF, BARCODE_TXT_BTH, BARCODE_TXT_ABV, BARCOD
from .constants import TXT_SIZE, TXT_NORMAL
from .constants import SET_FONT
from .constants import LINESPACING_FUNCS, LINESPACING_RESET
from .constants import LINE_DISPLAY_OPEN, LINE_DISPLAY_CLEAR, LINE_DISPLAY_CLOSE
from .constants import CD_KICK_DEC_SEQUENCE, CD_KICK_5, CD_KICK_2, PAPER_FULL_CUT, PAPER_PART_CUT
from .constants import HW_RESET, HW_SELECT, HW_INIT
from .constants import CTL_VT, CTL_HT, CTL_CR, CTL_FF, CTL_LF, CTL_SET_HT, PANEL_BUTTON_OFF, PANEL_BUTTON_ON
@@ -570,6 +571,41 @@ class Escpos(object):
except:
raise CashDrawerError()
def linedisplay_select(self, select_display=False):
""" Selects the line display or the printer
This method is used for line displays that are daisy-chained between your computer and printer.
If you set `select_display` to true, only the display is selected and if you set it to false,
only the printer is selected.
:param select_display: whether the display should be selected or the printer
:type select_display: bool
"""
if select_display:
self._raw(LINE_DISPLAY_OPEN)
else:
self._raw(LINE_DISPLAY_CLOSE)
def linedisplay_clear(self):
""" Clears the line display and resets the cursor
This method is used for line displays that are daisy-chained between your computer and printer.
"""
self._raw(LINE_DISPLAY_CLEAR)
def linedisplay(self, text):
"""
Display text on a line display connected to your printer
You should connect a line display to your printer. You can do this by daisy-chaining
the display between your computer and printer.
:param text: Text to display
"""
self.linedisplay_select(select_display=True)
self.linedisplay_clear()
self.text(text)
self.linedisplay_select(select_display=False)
def hw(self, hw):
""" Hardware operations