From ceb61a78a5c46b9a23ba39be6944f4a6811c36d5 Mon Sep 17 00:00:00 2001
From: TAHRI Ahmed <nyuubi.10@gmail.com>
Date: Tue, 15 Nov 2016 16:24:44 +0100
Subject: [PATCH] Preliminary support of pos 'line display' printing through
 Epson printer

---
 src/escpos/constants.py |  5 +++++
 src/escpos/escpos.py    | 10 ++++++++++
 2 files changed, 15 insertions(+)

diff --git a/src/escpos/constants.py b/src/escpos/constants.py
index b5cce39..9abe15f 100644
--- a/src/escpos/constants.py
+++ b/src/escpos/constants.py
@@ -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
diff --git a/src/escpos/escpos.py b/src/escpos/escpos.py
index 1249c10..f9e40f5 100644
--- a/src/escpos/escpos.py
+++ b/src/escpos/escpos.py
@@ -585,6 +585,16 @@ class Escpos(object):
             except:
                 raise CashDrawerError()
 
+    def linedisplay(self, text):
+        """
+        Display text on line display thought your epson printer
+        :param text: Text to display
+        """
+        self._raw(LINE_DISPLAY_OPEN)
+        self._raw(LINE_DISPLAY_CLEAR)
+        self.text(text)
+        self._raw(LINE_DISPLAY_CLOSE)
+
     def hw(self, hw):
         """ Hardware operations