유리상자 속 이야기

public partial class MainForm : Form
{
    private Timer MonitorTimer = new Timer();
    
    
    public MainForm() {
        InitializeComponent();
    }

    protected override void OnLoad(EventArgs e) {
        base.OnLoad(e);

        this.MonitorTimer.Interval = 5000; // 5초에 한번씩 상태를 체크
        this.MonitorTimer.Tick += new EventHandler(MonitorTimer_Tick);
        this.MonitorTimer.Start();
        // 최초 호출
        this.UpdateText();
        this.UpdateIcon();
    }


    protected override void OnClosing(CancelEventArgs e) {
        base.OnClosing(e);
        this.MonitorTimer.Stop();
    }


    void MonitorTimer_Tick(object sender, EventArgs e) {
        this.UpdateText();
        this.UpdateIcon();
    }


    private void UpdateText() {
        PowerStatus status = SystemInformation.PowerStatus;

        this.lblChargeStatus.Text = status.BatteryChargeStatus.ToString();
        this.lblFullLifeTime.Text = (status.BatteryFullLifetime != -1 ? status.BatteryFullLifetime.ToString() : "-");
        this.lblPowerStatus.Text = status.PowerLineStatus.ToString();
        this.lblRemainLifeTime.Text = (status.BatteryLifeRemaining != -1 ? TimeSpan.FromSeconds(status.BatteryLifeRemaining).ToString() : "-");
        this.progBarPower.Value = (int)(status.BatteryLifePercent != 255 ? status.BatteryLifePercent * 100 : 0);
    }


    private void UpdateIcon() {
        PowerStatus status = SystemInformation.PowerStatus;
        if (status.PowerLineStatus == PowerLineStatus.Offline) {
            if (status.BatteryLifePercent > 0.5) {
                this.picBoxPower.Image = PowerMonitor.Resource1.BatteryGreen;
            } else {
                this.picBoxPower.Image = PowerMonitor.Resource1.BatteryRed;
            }
        } else if (status.PowerLineStatus == PowerLineStatus.Online) {
            this.picBoxPower.Image = PowerMonitor.Resource1.PowerGreen;
        } else if(status.PowerLineStatus == PowerLineStatus.Unknown) {
            this.picBoxPower.Image = PowerMonitor.Resource1.unkown;
        }
    }
}