1 files changed, 105 insertions, 0 deletions
diff --git a/plugins/light_sensor/light_sensor.py b/plugins/light_sensor/light_sensor.py
new file mode 100644
index 0000000..ebf8587
--- /dev/null
+++ b/plugins/light_sensor/light_sensor.py
@@ -0,0 +1,105 @@
+#!/usr/bin/env python
+#Copyright (c) 2011 Walter Bender
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+import os
+
+from gettext import gettext as _
+
+from plugins.plugin import Plugin
+
+from TurtleArt.tapalette import make_palette
+from TurtleArt.tautils import debug_output
+from TurtleArt.taprimitive import Primitive
+from TurtleArt.tatype import TYPE_NUMBER
+
+import logging
+_logger = logging.getLogger('turtleart-activity light-sensor plugin')
+
+
+LIGHT_SENSOR_DEVICE = '/sys/devices/platform/olpc-ols.0/level'
+
+
+class Light_sensor(Plugin):
+
+    def __init__(self, parent):
+        Plugin.__init__(self)
+        self._parent = parent
+        if os.path.exists(LIGHT_SENSOR_DEVICE):
+            self._status = True
+        else:
+            self._status = False
+        self._light = 0
+        self.running_sugar = self._parent.running_sugar
+
+    def setup(self):
+        # set up light-sensor specific blocks
+        palette = make_palette('extras',
+                               colors=["#FF0000", "#A00000"],
+                               help_string=_('Palette of extra options'),
+                               position=8,
+                               translation=_('extras'))
+        '''
+        palette = make_palette('sensor',
+                               colors=["#FF6060", "#A06060"],
+                               help_string=_('Palette of sensor blocks'),
+                               position=6)
+        '''
+
+        if self._status:
+            palette.add_block('lightsensor',
+                              hidden=True,
+                              style='box-style',
+                              label=_('brightness'),
+                              value_block=True,
+                              help_string=\
+                                  _('light level detected by light sensor'),
+                              prim_name='lightsensor')
+        else:
+            palette.add_block('lightsensor',
+                              style='box-style',
+                              label=_('brightness'),
+                              value_block=True,
+                              help_string=\
+                                  _('light level detected by light sensor'),
+                              hidden=True,
+                              prim_name='lightsensor')
+
+        self._parent.lc.def_prim(
+            'lightsensor', 0,
+            Primitive(self.prim_lightsensor,
+                      return_type=TYPE_NUMBER,
+                      call_afterwards=self.after_light))
+
+    def _status_report(self):
+        debug_output('Reporting light-sensor status: %s' % (str(self._status)))
+        return self._status
+
+    # Block primitives
+
+    def prim_lightsensor(self):
+        if not self._status:
+            return -1
+        else:
+            fh = open(LIGHT_SENSOR_DEVICE)
+            string = fh.read()
+            fh.close()
+            self._light = float(string)
+            return self._light
+
+    def after_light(self):
+        if self._parent.lc.update_values:
+            self._parent.lc.update_label_value('lightsensor', self._light)