note
	description: "[
								Battery/power supply informations.
								You should never take a battery status as absolute truth. 
								Batteries (especially failing batteries) are delicate hardware, 
								and the values reported here are best estimates based on what that 
								hardware reports. It's not uncommon for older batteries to lose 
								stored power much faster than it reports, or completely drain when 
								reporting it has 20 percent left, etc.
		
								Battery status can change at any time; if you are concerned with power state,
								you should call this function frequently, and perhaps ignore changes until
								they seem to be stable for a few seconds.
	]"
	author: "Louis Marchand"
	date: "Thu, 28 Jan 2016 02:17:06 +0000"
	revision: "2.0"

class interface
	GAME_BATTERY

create 
	default_create

feature -- Access

	update
			-- Check the battery state and life to update the features of Current
	
feature -- Status Report

	is_life_left_valid: BOOLEAN
			-- The last update did not return any valid value for seconds_left and percentage_left.
			-- You can wait for some time and retry. If it is always not valid, maybe the system does not
			-- support battery life information or the system is not running on battery.

	seconds_left: INTEGER_32
			-- An approximation of the seconds of battery life left

	percentage_left: INTEGER_32
			-- An approximation of the percentage of battery life left

	is_state_unknown: BOOLEAN
			-- Cannot identify the state of Current
			-- You can wait for some time and retry.
			-- If it is always unknown, maybe the system does not support battery.

	is_state_on_battery: BOOLEAN
			-- not plugged in, running on the battery

	is_state_no_battery: BOOLEAN
			-- plugged in, no battery available

	is_state_charging: BOOLEAN
			-- plugged in, charging battery

	is_state_charged: BOOLEAN
			-- plugged in, battery charged
	
end -- class GAME_BATTERY

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