tbd-station-14/Content.Client/GameObjects/Components/WelderComponent.cs

using System;
using Content.Client.UserInterface;
using Content.Client.Utility;
using Content.Shared.GameObjects;
using Content.Shared.GameObjects.Components;
using Robust.Client.UserInterface;
using Robust.Client.UserInterface.Controls;
using Robust.Shared.GameObjects;
using Robust.Shared.Localization;
using Robust.Shared.Timing;
using Robust.Shared.ViewVariables;

namespace Content.Client.GameObjects.Components
{
    [RegisterComponent]
    public class WelderComponent : Component, IItemStatus
    {
        public override string Name => "Welder";
        public override uint? NetID => ContentNetIDs.WELDER;

        [ViewVariables] public float FuelCapacity { get; private set; }
        [ViewVariables] public float Fuel { get; private set; }
        [ViewVariables] public bool Activated { get; private set; }

        [ViewVariables(VVAccess.ReadWrite)] private bool _uiUpdateNeeded;

        public override void HandleComponentState(ComponentState curState, ComponentState nextState)
        {
            if (!(curState is WelderComponentState cast))
                return;

            FuelCapacity = cast.FuelCapacity;
            Fuel = cast.Fuel;
            Activated = cast.Activated;

            _uiUpdateNeeded = true;
        }

        public Control MakeControl() => new StatusControl(this);

        private sealed class StatusControl : Control
        {
            private readonly WelderComponent _parent;
            private readonly RichTextLabel _label;

            public StatusControl(WelderComponent parent)
            {
                _parent = parent;
                _label = new RichTextLabel {StyleClasses = {NanoStyle.StyleClassItemStatus}};
                AddChild(_label);

                parent._uiUpdateNeeded = true;
            }

            protected override void Update(FrameEventArgs args)
            {
                base.Update(args);

                if (!_parent._uiUpdateNeeded)
                {
                    return;
                }

                _parent._uiUpdateNeeded = false;

                var fuelCap = _parent.FuelCapacity;
                var fuel = _parent.Fuel;

                _label.SetMarkup(Loc.GetString("Fuel: [color={0}]{1}/{2}[/color]",
                    fuel < fuelCap / 4f ? "darkorange" : "orange", Math.Round(fuel), fuelCap));
            }
        }
    }
}