[mousetrap/gnome3-wip: 98/240] Add logging.

[Heidi Ellis <heidiellis src gnome org>]

commit 56c4b98186c473fd1d38a676fc901fd924671ab9
Author: Stoney Jackson <dr stoney gmail com>
Date:   Tue Jun 17 11:06:21 2014 -0400

    Add logging.

 src/mousetrap/initialize_logging.py |   24 ++++++++++++++++++++++++
 src/mousetrap/main.py               |   20 +++++++++++++-------
 src/mousetrap/pointers/eyes.py      |    7 ++++++-
 3 files changed, 43 insertions(+), 8 deletions(-)
---
diff --git a/src/mousetrap/initialize_logging.py b/src/mousetrap/initialize_logging.py
new file mode 100644
index 0000000..ad30a55
--- /dev/null
+++ b/src/mousetrap/initialize_logging.py
@@ -0,0 +1,24 @@
+import logging
+
+
+class MouseTrapLoggerInitializer():
+    initialized = False
+
+    @classmethod
+    def initialize(cls):
+        if not cls.initialized:
+            cls._initialize_logger()
+            cls.initialized = True
+
+    @classmethod
+    def _initialize_logger(cls):
+        app_logger = logging.getLogger('mousetrap')
+        app_logger.setLevel(logging.DEBUG)
+        handler = logging.StreamHandler()
+        handler.setLevel(logging.DEBUG)
+        formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
+        handler.setFormatter(formatter)
+        app_logger.addHandler(handler)
+
+
+MouseTrapLoggerInitializer.initialize()
diff --git a/src/mousetrap/main.py b/src/mousetrap/main.py
index 7183ccc..9147cd7 100644
--- a/src/mousetrap/main.py
+++ b/src/mousetrap/main.py
@@ -2,7 +2,10 @@
 Where it all begins.
 '''
 
-from datetime import datetime
+# NOTE: import this first to set up logging properly.
+import mousetrap.initialize_logging
+
+import logging
 from gi.repository import GObject, Gdk, Gtk
 from mousetrap.vision import Camera
 from mousetrap.gui import ScreenPointer, Gui
@@ -10,11 +13,14 @@ from mousetrap.pointers.nose_joystick import Pointer
 from mousetrap.pointers.eyes import Pointer as Eyes
 
 
-FPS = 10
-INTERVAL = int(round(1000.0 / FPS))
+LOGGER = logging.getLogger('mousetrap.main')
 
 
 class Main(object):
+
+    FPS = 10
+    INTERVAL = int(round(1000.0 / FPS))
+
     def __init__(self):
         self.timeout_id = None
         self.camera = Camera()
@@ -25,7 +31,7 @@ class Main(object):
         self.eyes = Eyes()
 
     def run(self):
-        self.timeout_id = GObject.timeout_add(INTERVAL, self.on_timeout, None)
+        self.timeout_id = GObject.timeout_add(self.INTERVAL, self.on_timeout, None)
         self.gui.start()
 
     def on_timeout(self, user_data):
@@ -41,7 +47,7 @@ class Main(object):
         if position is not None:
             return True
 
-        print str(datetime.now()) + ': No change.'
+        LOGGER.debug('No change.')
 
         self.eyes.update_image(image)
         keys = self.eyes.get_keys()
@@ -49,12 +55,12 @@ class Main(object):
         if keys is None:
             return True
 
-        print keys.get_actions()
+        LOGGER.debug(keys.get_actions())
 
         display = Display()
 
         for action in keys.get_actions():
-            print action.event, action.button
+            LOGGER.debug('%s %s', action.event, action.button)
 
             xtest.fake_input(display, action.event, action.button)
             display.sync()
diff --git a/src/mousetrap/pointers/eyes.py b/src/mousetrap/pointers/eyes.py
index eb8cc07..f79099f 100644
--- a/src/mousetrap/pointers/eyes.py
+++ b/src/mousetrap/pointers/eyes.py
@@ -1,9 +1,14 @@
 import mousetrap.pointers.interface as interface
 from mousetrap.vision import FeatureDetector, FeatureNotFoundException
+import logging
+
+
+LOGGER = logging.getLogger(__name__)
 
 
 class Pointer(interface.Pointer):
     def __init__(self):
+
         self._left_locator = LeftEyeLocator()
 
         self._history = []
@@ -67,7 +72,7 @@ class LeftEyeLocator(object):
         face = self._face_detector.detect(image)
         eye = self._eye_detector.detect(face["image"])
 
-        print eye
+        LOGGER.debug(eye)
 
         return (0, 0)