86 lines
4.4 KiB
C#
86 lines
4.4 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Diagnostics.CodeAnalysis;
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using Microsoft.Xna.Framework;
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namespace Syntriax.Engine.Core.Abstract;
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/// <summary>
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/// Responsible for controlling <see cref="IBehaviour"/>s and notify them accordingly about the engine's updates. Connected to an <see cref="IGameObject"/>.
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/// </summary>
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public interface IBehaviourController : IAssignableGameObject
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{
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/// <summary>
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/// Callback triggered when the <see cref="Update(GameTime)"/> is called.
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/// </summary>
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Action<IBehaviourController, GameTime>? OnUpdate { get; set; }
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/// <summary>
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/// Callback triggered when the <see cref="OnPreDraw(GameTime)"/> is called.
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/// </summary>
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Action<IBehaviourController, GameTime>? OnPreDraw { get; set; }
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/// <summary>
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/// Callback triggered when the <see cref="IBehaviourController"/> has been registered a new <see cref="IBehaviour"/>.
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/// </summary>
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Action<IBehaviourController, IBehaviour>? OnBehaviourAdded { get; set; }
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/// <summary>
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/// Callback triggered when the <see cref="IBehaviourController"/> has been removed an existing <see cref="IBehaviour"/>.
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/// </summary>
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Action<IBehaviourController, IBehaviour>? OnBehaviourRemoved { get; set; }
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/// <summary>
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/// Registers the provided <see cref="IBehaviour"/> to be controlled by the <see cref="IBehaviourController"/>.
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/// </summary>
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/// <param name="behaviour">Uninitialized <see cref="IBehaviour"/> to be registered.</param>
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/// <typeparam name="T">An implemented class of <see cref="IBehaviour"/></typeparam>
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/// <returns>The provided <see cref="IBehaviour"/> class after initialization.</returns>
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T AddBehaviour<T>(T behaviour) where T : class, IBehaviour;
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/// <summary>
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/// Instantiates the provided <see cref="IBehaviour"/> type and registers it to the <see cref="IBehaviourController"/>.
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/// </summary>
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/// <param name="args">Constructor parameters for the given <see cref="IBehaviour"/> class.</param>
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/// <typeparam name="T">An implemented class of <see cref="IBehaviour"/></typeparam>
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/// <returns>The instantiated <see cref="IBehaviour"/> class after initialization.</returns>
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T AddBehaviour<T>(params object?[]? args) where T : class, IBehaviour;
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/// <summary>
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/// Looks up and tries to get the <see cref="IBehaviour"/> that is controlled by the <see cref="IBehaviourController"/>.
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/// </summary>
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/// <param name="behaviour">If return value is <see cref="true"/> outputs the class found in the <see cref="IBehaviourController"/>. If the return value is falls, this parameter is <see cref="null"/></param>
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/// <typeparam name="T">An implemented class or <see cref="interface"/></typeparam>
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/// <returns>
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/// <see cref="true"/>, if the type of <see cref="IBehaviour"/> is present in the <see cref="IBehaviourController"/>, <see cref="false"/> if not.
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/// </returns>
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bool TryGetBehaviour<T>([NotNullWhen(returnValue: true)] out T? behaviour);
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/// <typeparam name="T">An implemented class or <see cref="interface"/> of <see cref="IBehaviour"/></typeparam>
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/// <returns>Returns a list of all the matching <see cref="IBehaviour"/>s found in the <see cref="IBehaviourController"/>.</returns>
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IList<T> GetBehaviours<T>() where T : IBehaviour;
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/// <summary>
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/// Removes the <see cref="IBehaviour"/> found in the <see cref="IBehaviourController"/>.
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/// </summary>
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/// <param name="removeAll">If all of the instances of the given Type is to be removed or not.</param>
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/// <typeparam name="T">An implemented class or <see cref="interface"/> of <see cref="IBehaviour"/></typeparam>
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void RemoveBehaviour<T>(bool removeAll = false) where T : IBehaviour;
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/// <summary>
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/// To be called in every frame of the engine. Responsible for notifying <see cref="IBehaviour"/>'s under the <see cref="IBehaviourController"/>'s control that a new frame is happening.
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/// </summary>
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/// <param name="gameTime"><see cref="GameTime"/> information from the game.</param>
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void Update(GameTime gameTime);
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/// <summary>
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/// To be called before every draw call from the engine. Responsible for notifying <see cref="IBehaviour"/>'s under the <see cref="IBehaviourController"/>'s control that the engine is about to start drawing into the screen.
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/// </summary>
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/// <param name="gameTime"><see cref="GameTime"/> information from the game.</param>
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void UpdatePreDraw(GameTime gameTime);
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}
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