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# coding=utf-8
'''
Flash
=====
The :class:`Flash` provides access to public methods to use flash of your
device.
.. note::
In android you need CAMERA, FLASHLIGHT permissions
to access flash.
.. versionadded:: 1.2.5
This can be used to activate the flash of your camera on
Android and iOS.
Simple Examples
---------------
To turn on flash::
>>> from plyer import flash
>>> flash.on()
To turn off flash::
>>> flash.off()
To release flash::
>>> flash.release()
Supported Platforms
-------------------
Android, iOS
'''
class Flash:
"""
Flash facade.
"""
def on(self):
"""
Activate the flash
"""
self._on()
def off(self):
"""
Deactiavte the flash
"""
self._off()
def release(self):
"""
Release any access to the Flash / Camera.
Call this when you're done using the Flash.
This will release the Camera, and stop any process.
Next call to `_on` will reactivate it.
"""
self._release()
# private
def _on(self):
raise NotImplementedError()
def _off(self):
raise NotImplementedError()
def _release(self):
pass
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