1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
#!/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.talogo import primitive_dictionary
from TurtleArt.tautils import debug_output
from TurtleArt.taprimitive import Primitive
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('sensor',
colors=["#FF6060", "#A06060"],
help_string=_('Palette of sensor blocks'),
position=6)
if self._status:
palette.add_block('lightsensor',
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,
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)
|