Browse Source
* The power state is currently exposed via a property. Events
(firing on state changes, alarms at certain percentages, etc)
will come later.
* A simple sample project (only outputs to console so far) is
included.
improved_timing
9 changed files with 155 additions and 0 deletions
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|
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namespace DotSDL.Power { |
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/// <summary> |
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/// The status of the system's battery. |
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/// </summary> |
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public enum BatteryStatus { |
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/// <summary> |
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/// Cannot determine power status. |
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/// </summary> |
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Unknown = 0x00, |
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|
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/// <summary> |
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/// Not plugged in, running on the battery. |
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/// </summary> |
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OnBattery = 0x01, |
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/// <summary> |
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/// Plugged in, no battery available. |
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/// </summary> |
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NoBattery = 0x02, |
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/// <summary> |
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/// Plugged in, charging battery. |
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/// </summary> |
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Charging = 0x03, |
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/// <summary> |
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/// Plugged in, battery charged. |
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/// </summary> |
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Charged = 0x04 |
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} |
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} |
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using System; |
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namespace DotSDL.Power { |
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/// <summary> |
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/// Contains functions for handling a system's power supply. This is most |
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/// useful on laptops, though it may also be useful for desktop PCs that |
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/// are connected to a UPS. |
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/// </summary> |
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public static class PowerState { |
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/// <summary> |
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/// Retrieves the current power state of the system as a |
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/// <see cref="PowerStatus"/> object. |
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/// </summary> |
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public static PowerStatus CurrentPowerState { |
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get { |
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var state = Sdl.Power.GetPowerInfo(out var secs, out var pct); |
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return new PowerStatus { |
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BatteryStatus = state, |
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BatteryPercent = pct, |
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TimeRemaining = TimeSpan.FromSeconds(secs) |
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}; |
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} |
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} |
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} |
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} |
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using System; |
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namespace DotSDL.Power { |
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public class PowerStatus { |
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/// <summary> |
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/// The current state of the system's battery. |
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/// </summary> |
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public BatteryStatus BatteryStatus { get; internal set; } |
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/// <summary> |
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/// The approximate percentage of battery power remaining. |
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/// </summary> |
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public int BatteryPercent { get; internal set; } |
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/// <summary> |
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/// The approximate amount of time that the system can be powered by the |
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/// battery. |
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/// </summary> |
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public TimeSpan TimeRemaining { get; internal set; } |
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} |
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} |
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using DotSDL.Power; |
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using System.Runtime.InteropServices; |
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namespace DotSDL.Sdl { |
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/// <summary> |
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/// Contains the necessary constants and function imports from SDL_power.h. |
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/// </summary> |
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internal static class Power { |
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/// <summary> |
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/// Get the current power supply details. |
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/// </summary> |
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/// <param name="secs">Seconds of battery life left. You can pass a NULL |
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/// here if you don't care. Will return -1 if we can't determine a value, |
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/// or we're not running on a battery.</param> |
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/// <param name="pct">Percentage of battery life left, between 0 and 100. |
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/// You can pass a NULL here if you don't care. Will return -1 if we |
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/// can't determine a value, or we're not running on a battery.</param> |
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/// <returns>The state of the battery (if any).</returns> |
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[DllImport(Meta.DllName, EntryPoint = "SDL_GetPowerInfo", CallingConvention = CallingConvention.Cdecl)] |
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internal static extern BatteryStatus GetPowerInfo(out int secs, out int pct); |
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} |
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} |
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using System; |
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namespace Sample.Power { |
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class Program { |
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static void Main(string[] args) { |
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var window = new Window(256, 128); |
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window.Start(100, 16); |
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} |
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} |
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} |
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<Project Sdk="Microsoft.NET.Sdk"> |
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<PropertyGroup> |
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<OutputType>Exe</OutputType> |
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<TargetFramework>netcoreapp2.0</TargetFramework> |
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</PropertyGroup> |
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<ItemGroup> |
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<ProjectReference Include="..\..\DotSDL\DotSDL.csproj" /> |
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</ItemGroup> |
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</Project> |
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using System; |
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using DotSDL.Events; |
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using DotSDL.Graphics; |
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using DotSDL.Input.Keyboard; |
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namespace Sample.Power { |
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public class Window : SdlWindow { |
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public Window(int width, int height) : base("Power Test", |
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new Point { X = WindowPosUndefined, Y = WindowPosUndefined }, |
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width, height, width, height) { |
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KeyPressed += Window_KeyPressed; |
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} |
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private void Window_KeyPressed(object sender, KeyboardEvent e) { |
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if(e.Keycode == Keycode.Escape) |
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Stop(); |
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if(e.Keycode == Keycode.P) { |
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var power = DotSDL.Power.PowerState.CurrentPowerState; |
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Console.WriteLine($"Status: {power.BatteryStatus}; percent: {power.BatteryPercent}; minutes: {power.TimeRemaining.TotalMinutes}"); |
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} |
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} |
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} |
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} |
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