Add sensor to detect ebook mode

1 files changed, 74 insertions, 0 deletions

diff --git a/sensors.py b/sensors.py
new file mode 100644
index 0000000..7469612
--- /dev/null
+++ b/sensors.py
@@ -0,0 +1,74 @@
+import threading
+import subprocess
+
+from gi.repository import GObject
+
+GObject.threads_init()
+
+
+class EbookModeDetector(GObject.GObject):
+
+    EBOOK_DEVICE = '/dev/input/event4'
+
+    __gsignals__ = {
+        'changed': (GObject.SignalFlags.RUN_FIRST, None, ([bool])), }
+
+    def __init__(self):
+        GObject.GObject.__init__(self)
+        self._ebook_mode = self._get_initial_value()
+        self._start_reading()
+
+    def get_ebook_mode(self):
+        return self._ebook_mode
+
+    def _get_initial_value(self):
+        output = subprocess.call(['evtest', '--query', self.EBOOK_DEVICE,
+                                  'EV_SW', 'SW_TABLET_MODE'])
+        # 10 is ebook_mode, 0 is normal
+        return (output == 10)
+        logging.error('Initial state %s', (output == 10))
+
+    def _start_reading(self):
+        thread = threading.Thread(target=self._read)
+        thread.daemon = True
+        thread.start()
+
+    def _read(self):
+        fd = open(self.EBOOK_DEVICE, 'rb')
+        for x in range(12):
+            fd.read(1)
+        self._report_change(ord(fd.read(1)))
+
+    def _report_change(self, value):
+        self._ebook_mode = (value == 1)
+        self.emit('changed', self._ebook_mode)
+        # restart
+        GObject.idle_add(self._start_reading)
+
+# Move to tests
+
+import logging
+from gi.repository import Gtk
+
+
+def log_ebook_mode(detector, ebook_mode):
+    logging.error('Ebook mode %s', ebook_mode)
+
+
+def quit(win, detector):
+    Gtk.main_quit()
+
+
+def main():
+    win = Gtk.Window()
+    win.set_default_size(450, 550)
+    label = Gtk.Label('Put your xo in ebook mode nd in notebook mode')
+    win.add(label)
+    win.show_all()
+    ebookdetector = EbookModeDetector()
+    ebookdetector.connect('changed', log_ebook_mode)
+    win.connect('destroy', quit, ebookdetector)
+    Gtk.main()
+
+if __name__ == '__main__':
+    main()