CustomEntryIcon.cs

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using System;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using ReLogic.Content;
using Terraria.Localization;
 
namespace Terraria.GameContent.Bestiary;
 
public class CustomEntryIcon : IEntryIcon
{
    private LocalizedText _text;
 
    private Asset<Texture2D> _textureAsset;
 
    private Rectangle _sourceRectangle;
 
    private Func<bool> _unlockCondition;
 
    public CustomEntryIcon(string nameLanguageKey, string texturePath, Func<bool> unlockCondition)
    {
        _text = Language.GetText(nameLanguageKey);
        _textureAsset = Main.Assets.Request<Texture2D>(texturePath, (AssetRequestMode)1);
        _unlockCondition = unlockCondition;
        UpdateUnlockState(state: false);
    }
 
    public IEntryIcon CreateClone()
    {
        return new CustomEntryIcon(_text.Key, _textureAsset.Name, _unlockCondition);
    }
 
    public void Update(BestiaryUICollectionInfo providedInfo, Rectangle hitbox, EntryIconDrawSettings settings)
    {
        UpdateUnlockState(GetUnlockState(providedInfo));
    }
 
    public void Draw(BestiaryUICollectionInfo providedInfo, SpriteBatch spriteBatch, EntryIconDrawSettings settings)
    {
        Rectangle iconbox = settings.iconbox;
        spriteBatch.Draw(_textureAsset.Value, iconbox.Center.ToVector2() + Vector2.One, _sourceRectangle, Color.White, 0f, _sourceRectangle.Size() / 2f, 1f, SpriteEffects.None, 0f);
    }
 
    public string GetHoverText(BestiaryUICollectionInfo providedInfo)
    {
        if (GetUnlockState(providedInfo))
        {
            return _text.Value;
        }
        return "???";
    }
 
    private void UpdateUnlockState(bool state)
    {
        _sourceRectangle = _textureAsset.Frame(2, 1, state.ToInt());
        _sourceRectangle.Inflate(-2, -2);
    }
 
    public bool GetUnlockState(BestiaryUICollectionInfo providedInfo)
    {
        return providedInfo.UnlockState > BestiaryEntryUnlockState.NotKnownAtAll_0;
    }
}