openCom-Companion/sbapp/plyer/platforms/android/compass.py

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'''
Android Compass
---------------------
'''
from plyer.facades import Compass
from jnius import PythonJavaClass, java_method, autoclass, cast
from plyer.platforms.android import activity
Context = autoclass('android.content.Context')
Sensor = autoclass('android.hardware.Sensor')
SensorManager = autoclass('android.hardware.SensorManager')
class MFUSensorListener(PythonJavaClass):
__javainterfaces__ = ['android/hardware/SensorEventListener']
def __init__(self):
super().__init__()
service = activity.getSystemService(Context.SENSOR_SERVICE)
self.SensorManager = cast('android.hardware.SensorManager', service)
self.sensor = self.SensorManager.getDefaultSensor(
Sensor.TYPE_MAGNETIC_FIELD_UNCALIBRATED)
self.values = [None, None, None, None, None, None]
def enable(self):
self.SensorManager.registerListener(
self, self.sensor,
SensorManager.SENSOR_DELAY_NORMAL
)
def disable(self):
self.SensorManager.unregisterListener(self, self.sensor)
@java_method('(Landroid/hardware/SensorEvent;)V')
def onSensorChanged(self, event):
self.values = event.values[:6]
@java_method('(Landroid/hardware/Sensor;I)V')
def onAccuracyChanged(self, sensor, accuracy):
pass
class MagneticFieldSensorListener(PythonJavaClass):
__javainterfaces__ = ['android/hardware/SensorEventListener']
def __init__(self):
super().__init__()
self.SensorManager = cast(
'android.hardware.SensorManager',
activity.getSystemService(Context.SENSOR_SERVICE)
)
self.sensor = self.SensorManager.getDefaultSensor(
Sensor.TYPE_MAGNETIC_FIELD
)
self.values = [None, None, None]
def enable(self):
self.SensorManager.registerListener(
self, self.sensor,
SensorManager.SENSOR_DELAY_NORMAL
)
def disable(self):
self.SensorManager.unregisterListener(self, self.sensor)
@java_method('(Landroid/hardware/SensorEvent;)V')
def onSensorChanged(self, event):
self.values = event.values[:3]
@java_method('(Landroid/hardware/Sensor;I)V')
def onAccuracyChanged(self, sensor, accuracy):
# Maybe, do something in future?
pass
class AndroidCompass(Compass):
def __init__(self):
super().__init__()
self.bState = False
def _enable(self):
if (not self.bState):
self.listenerm = MagneticFieldSensorListener()
self.listenermu = MFUSensorListener()
self.listenerm.enable()
self.listenermu.enable()
self.bState = True
def _disable(self):
if (self.bState):
self.bState = False
self.listenerm.disable()
self.listenermu.disable()
del self.listenerm
del self.listenermu
def _get_orientation(self):
if (self.bState):
return tuple(self.listenerm.values)
else:
return (None, None, None)
def _get_field_uncalib(self):
if (self.bState):
return tuple(self.listenermu.values)
else:
return (None, None, None, None, None, None)
def __del__(self):
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if self.bState:
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self._disable()
super().__del__()
def instance():
return AndroidCompass()