From 046a24dbf4fcd45e4b8123c82c46e89394191f13 Mon Sep 17 00:00:00 2001
From: Jose Commins <axora@axora.net>
Date: Mon, 18 Apr 2016 20:12:58 +0100
Subject: Added support for async driver for systems with Python 3.4 and above.

---
 install.sh     |  15 +++++++-
 touch_async.py | 111 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 125 insertions(+), 1 deletion(-)
 create mode 100644 touch_async.py

diff --git a/install.sh b/install.sh
index 9af1910..f5cbd0a 100644
--- a/install.sh
+++ b/install.sh
@@ -1,5 +1,12 @@
 #!/bin/bash
 
+
+# For checking version numbers greater than or equal.
+check_ver_lte() {
+    [  "$1" = "`echo -e "$1\n$2" | sort -V | head -n1`" ]
+}
+
+
 chmod +x *.sh *.py
 sudo patch -b /boot/config.txt 7inch.patch
 sudo apt-get install -y python3-pip libudev-dev
@@ -7,7 +14,13 @@ sudo pip-3.2 install python-uinput pyudev
 #if pip-3.2 can't be found, please use pip3
 #sudo pip3 install python-uinput pyudev
 
-sudo cp touch.py /usr/bin/
+PYTHON_VERSION=`python3 -c 'import sys; print(".".join(map(str, sys.version_info[:3])))'`
+if check_ver_lte "3.4" $PYTHON_VERSION; then
+    echo "Python $PYTHON_VERSION detected - using async driver."
+    sudo cp touch_async.py /usr/bin/touch.py
+else
+    sudo cp touch.py /usr/bin/
+fi
 sudo cp touch.sh /etc/init.d/
 
 sudo chmod +x /usr/bin/touch.py
diff --git a/touch_async.py b/touch_async.py
new file mode 100644
index 0000000..6d3d47e
--- /dev/null
+++ b/touch_async.py
@@ -0,0 +1,111 @@
+#!/usr/bin/env python3
+
+import struct
+import time
+import math
+import glob
+import uinput
+import pyudev
+import os
+import asyncio
+
+
+def check_device(thedevice):
+    # Currently we don't get a full udev dictionary from the device on
+    # Raspberry pi, so we do a hard search for the device vendor/id hex.
+    if '0EEF:0005' in (thedevice.get('DEVPATH')):
+        print("Device found at: ", thedevice.device_node)
+        with open(thedevice.device_node, 'rb') as f:
+            print("Opening device and initiating mouse emulation.")
+            tasks.clear()
+            tasks.append(asyncio.async(read_and_emulate_mouse(f)))
+            loop.run_until_complete(asyncio.wait(tasks))
+            print("Device async task terminated.")
+
+
+@asyncio.coroutine
+def async_read_data(fd, length):
+    yield from asyncio.sleep(0)
+    return fd.read(length)
+
+
+@asyncio.coroutine
+def read_and_emulate_mouse(fd):
+
+    cnt = 0
+
+    input_device = uinput.Device([
+        uinput.BTN_LEFT,
+        uinput.BTN_RIGHT,
+        uinput.ABS_X,
+        uinput.ABS_Y,
+    ])
+
+    clicked = False
+    rightClicked = False
+    (lastX, lastY) = (0, 0)
+    startTime = time.time()
+
+    while True:
+        cnt = cnt + 1
+        try:
+            touch_data = yield from async_read_data(fd, 25)
+            # print('Data' + ': ' + str(cnt) + ' - ' + str(len(touch_data)))
+            if touch_data == 0:
+                break;
+        except IOError:
+            return 0
+
+        (tag, btnLeft, x, y) = struct.unpack_from('>c?HH', touch_data)
+        print(btnLeft, x, y)
+
+        if btnLeft:
+            input_device.emit(uinput.ABS_X, x, True)
+            input_device.emit(uinput.ABS_Y, y, True)
+
+            if not clicked:
+                print("Left click.")
+                input_device.emit(uinput.BTN_LEFT, 1)
+                clicked = True
+                startTime = time.time()
+                (lastX, lastY) = (x, y)
+
+            duration = time.time() - startTime
+            movement = math.sqrt(pow(x - lastX, 2) + pow(y - lastY, 2))
+
+            if clicked and (not rightClicked) and (duration > 1) and (movement < 20):
+                print("Right click.")
+                input_device.emit(uinput.BTN_RIGHT, 1)
+                input_device.emit(uinput.BTN_RIGHT, 0)
+                rightClicked = True
+        else:
+            print("Release.")
+            clicked = False
+            rightClicked = False
+            input_device.emit(uinput.BTN_LEFT, 0)
+
+    fd.close()
+
+
+if __name__ == "__main__":
+    os.system("modprobe uinput")
+
+    tasks = []
+    loop = asyncio.get_event_loop()
+
+    context = pyudev.Context()
+    print("Checking devices already plugged-in...")
+    for device in context.list_devices(subsystem='hidraw'):
+        check_device(device)
+
+    monitor = pyudev.Monitor.from_netlink(context)
+    monitor.filter_by(subsystem='hidraw')
+    print("Waiting for touch device connection...")
+
+    for device in iter(monitor.poll, None):
+        print("HID device notification.  ACTION: ", device.get('ACTION'))
+#        print(device.device_node)
+
+        if 'add' in (device.get('ACTION')):
+            check_device(device)
+
-- 
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