50 lines
1.2 KiB
C#
50 lines
1.2 KiB
C#
namespace Engine.Core;
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public class StateEnable : IStateEnable
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{
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public Event<IStateEnable, IStateEnable.EnabledChangedArguments> OnEnabledChanged { get; } = new();
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public Event<IHasEntity> OnEntityAssigned { get; } = new();
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public Event<IAssignable>? OnUnassigned { get; } = new();
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private bool _enabled = true;
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private IEntity _entity = null!;
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public IEntity Entity => _entity;
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public bool Enabled
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{
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get => _enabled;
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set
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{
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if (value == _enabled)
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return;
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bool previousState = _enabled;
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_enabled = value;
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OnEnabledChanged?.Invoke(this, new(previousState));
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}
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}
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protected virtual void OnAssign(IEntity entity) { }
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public bool Assign(IEntity entity)
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{
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if (_entity is not null && _entity.IsInitialized)
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return false;
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_entity = entity;
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OnAssign(entity);
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OnEntityAssigned?.Invoke(this);
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return true;
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}
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public bool Unassign()
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{
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if (_entity is null)
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return false;
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_entity = null!;
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OnUnassigned?.Invoke(this);
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return true;
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}
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}
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