111 lines
3.8 KiB
C#
111 lines
3.8 KiB
C#
using System;
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using System.Collections.Generic;
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using Microsoft.Xna.Framework.Input;
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using Engine.Core;
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using Engine.Systems.Input;
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namespace Engine.Integration.MonoGame;
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public class KeyboardInputs : Behaviour, IButtonInputs<Keys>, IUpdate
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{
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public IButtonInputs<Keys>.InputEvent OnAnyButtonPressed { get; } = new();
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public IButtonInputs<Keys>.InputEvent OnAnyButtonReleased { get; } = new();
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private readonly Dictionary<Keys, IButtonInputs<Keys>.InputEvent> OnPressed = new(256);
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private readonly Dictionary<Keys, IButtonInputs<Keys>.InputEvent> OnReleased = new(256);
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private int cachePressedCurrentlyCount = 0;
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private readonly Keys[] cachePressedCurrently = new Keys[256];
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private int cachePressedPreviouslyCount = 0;
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private readonly Keys[] cachePressedPreviously = new Keys[256];
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public void RegisterOnPress(Keys key, IButtonInputs<Keys>.InputEvent.EventHandler callback)
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{
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if (!OnPressed.TryGetValue(key, out IButtonInputs<Keys>.InputEvent? delegateCallback))
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{
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delegateCallback = new();
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OnPressed.Add(key, delegateCallback);
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}
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delegateCallback.AddListener(callback);
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}
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public void UnregisterOnPress(Keys key, IButtonInputs<Keys>.InputEvent.EventHandler callback)
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{
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if (OnPressed.TryGetValue(key, out IButtonInputs<Keys>.InputEvent? delegateCallback))
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delegateCallback.RemoveListener(callback);
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}
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public void RegisterOnRelease(Keys key, IButtonInputs<Keys>.InputEvent.EventHandler callback)
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{
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if (!OnReleased.TryGetValue(key, out IButtonInputs<Keys>.InputEvent? delegateCallback))
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{
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delegateCallback = new();
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OnReleased.Add(key, delegateCallback);
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}
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delegateCallback.AddListener(callback);
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}
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public void UnregisterOnRelease(Keys key, IButtonInputs<Keys>.InputEvent.EventHandler callback)
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{
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if (OnReleased.TryGetValue(key, out IButtonInputs<Keys>.InputEvent? delegateCallback))
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delegateCallback.RemoveListener(callback);
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}
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public void Update()
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{
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KeyboardState keyboardState = Keyboard.GetState();
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keyboardState.GetPressedKeys(cachePressedCurrently);
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cachePressedCurrentlyCount = keyboardState.GetPressedKeyCount();
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for (int i = 0; i < cachePressedCurrentlyCount; i++)
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{
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Keys currentlyPressedKey = cachePressedCurrently[i];
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if (WasPressed(currentlyPressedKey))
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continue;
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if (OnPressed.TryGetValue(currentlyPressedKey, out IButtonInputs<Keys>.InputEvent? callback))
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callback?.Invoke(this, new(currentlyPressedKey));
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OnAnyButtonPressed?.Invoke(this, new(currentlyPressedKey));
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}
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for (int i = 0; i < cachePressedPreviouslyCount; i++)
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{
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Keys previouslyPressedKey = cachePressedPreviously[i];
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if (IsPressed(previouslyPressedKey))
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continue;
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if (OnReleased.TryGetValue(previouslyPressedKey, out IButtonInputs<Keys>.InputEvent? callback))
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callback?.Invoke(this, new(previouslyPressedKey));
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OnAnyButtonReleased?.Invoke(this, new(previouslyPressedKey));
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}
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Array.Copy(cachePressedCurrently, cachePressedPreviously, cachePressedCurrentlyCount);
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cachePressedPreviouslyCount = cachePressedCurrentlyCount;
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}
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public bool IsPressed(Keys key)
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{
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for (int i = 0; i < cachePressedCurrentlyCount; i++)
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if (cachePressedCurrently[i] == key)
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return true;
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return false;
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}
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private bool WasPressed(Keys key)
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{
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for (int i = 0; i < cachePressedPreviouslyCount; i++)
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if (cachePressedPreviously[i] == key)
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return true;
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return false;
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}
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}
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