GroupOptionButton.cs

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using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using ReLogic.Content;
using Terraria.Audio;
using Terraria.ID;
using Terraria.Localization;
using Terraria.UI;
 
namespace Terraria.GameContent.UI.Elements;
 
public class GroupOptionButton<T> : UIElement, IGroupOptionButton
{
    private T _currentOption;
 
    private readonly Asset<Texture2D> _BasePanelTexture;
 
    private readonly Asset<Texture2D> _selectedBorderTexture;
 
    private readonly Asset<Texture2D> _hoveredBorderTexture;
 
    private readonly Asset<Texture2D> _iconTexture;
 
    private readonly T _myOption;
 
    private Color _color;
 
    private Color _borderColor;
 
    public float FadeFromBlack = 1f;
 
    private float _whiteLerp = 0.7f;
 
    private float _opacity = 0.7f;
 
    private bool _hovered;
 
    private bool _soundedHover;
 
    public bool ShowHighlightWhenSelected = true;
 
    private bool _UseOverrideColors;
 
    private Color _overrideUnpickedColor = Color.White;
 
    private Color _overridePickedColor = Color.White;
 
    private float _overrideOpacityPicked;
 
    private float _overrideOpacityUnpicked;
 
    public readonly LocalizedText Description;
 
    private UIText _title;
 
    public T OptionValue => _myOption;
 
    public bool IsSelected
    {
        get
        {
            if (_currentOption != null)
            {
                return _currentOption.Equals(_myOption);
            }
            return false;
        }
    }
 
    public GroupOptionButton(T option, LocalizedText title, LocalizedText description, Color textColor, string iconTexturePath, float textSize = 1f, float titleAlignmentX = 0.5f, float titleWidthReduction = 10f)
    {
        _borderColor = Color.White;
        _currentOption = option;
        _myOption = option;
        Description = description;
        Width = StyleDimension.FromPixels(44f);
        Height = StyleDimension.FromPixels(34f);
        _BasePanelTexture = Main.Assets.Request<Texture2D>("Images/UI/CharCreation/PanelGrayscale", (AssetRequestMode)1);
        _selectedBorderTexture = Main.Assets.Request<Texture2D>("Images/UI/CharCreation/CategoryPanelHighlight", (AssetRequestMode)1);
        _hoveredBorderTexture = Main.Assets.Request<Texture2D>("Images/UI/CharCreation/CategoryPanelBorder", (AssetRequestMode)1);
        if (iconTexturePath != null)
        {
            _iconTexture = Main.Assets.Request<Texture2D>(iconTexturePath, (AssetRequestMode)1);
        }
        _color = Colors.InventoryDefaultColor;
        if (title != null)
        {
            UIText uIText = new UIText(title, textSize)
            {
                HAlign = titleAlignmentX,
                VAlign = 0.5f,
                Width = StyleDimension.FromPixelsAndPercent(0f - titleWidthReduction, 1f),
                Top = StyleDimension.FromPixels(0f)
            };
            uIText.TextColor = textColor;
            Append(uIText);
            _title = uIText;
        }
    }
 
    public void SetText(LocalizedText text, float textSize, Color color)
    {
        if (_title != null)
        {
            _title.Remove();
        }
        UIText uIText = new UIText(text, textSize)
        {
            HAlign = 0.5f,
            VAlign = 0.5f,
            Width = StyleDimension.FromPixelsAndPercent(-10f, 1f),
            Top = StyleDimension.FromPixels(0f)
        };
        uIText.TextColor = color;
        Append(uIText);
        _title = uIText;
    }
 
    public void SetCurrentOption(T option)
    {
        _currentOption = option;
    }
 
    protected override void DrawSelf(SpriteBatch spriteBatch)
    {
        if (_hovered)
        {
            if (!_soundedHover)
            {
                SoundEngine.PlaySound(12);
            }
            _soundedHover = true;
        }
        else
        {
            _soundedHover = false;
        }
        CalculatedStyle dimensions = GetDimensions();
        Color color = _color;
        float num = _opacity;
        bool isSelected = IsSelected;
        if (_UseOverrideColors)
        {
            color = (isSelected ? _overridePickedColor : _overrideUnpickedColor);
            num = (isSelected ? _overrideOpacityPicked : _overrideOpacityUnpicked);
        }
        Utils.DrawSplicedPanel(spriteBatch, _BasePanelTexture.Value, (int)dimensions.X, (int)dimensions.Y, (int)dimensions.Width, (int)dimensions.Height, 10, 10, 10, 10, Color.Lerp(Color.Black, color, FadeFromBlack) * num);
        if (isSelected && ShowHighlightWhenSelected)
        {
            Utils.DrawSplicedPanel(spriteBatch, _selectedBorderTexture.Value, (int)dimensions.X + 7, (int)dimensions.Y + 7, (int)dimensions.Width - 14, (int)dimensions.Height - 14, 10, 10, 10, 10, Color.Lerp(color, Color.White, _whiteLerp) * num);
        }
        if (_hovered)
        {
            Utils.DrawSplicedPanel(spriteBatch, _hoveredBorderTexture.Value, (int)dimensions.X, (int)dimensions.Y, (int)dimensions.Width, (int)dimensions.Height, 10, 10, 10, 10, _borderColor);
        }
        if (_iconTexture != null)
        {
            Color color2 = Color.White;
            if (!_hovered && !isSelected)
            {
                color2 = Color.Lerp(color, Color.White, _whiteLerp) * num;
            }
            spriteBatch.Draw(_iconTexture.Value, new Vector2(dimensions.X + 1f, dimensions.Y + 1f), color2);
        }
    }
 
    public override void LeftMouseDown(UIMouseEvent evt)
    {
        SoundEngine.PlaySound(12);
        base.LeftMouseDown(evt);
    }
 
    public override void MouseOver(UIMouseEvent evt)
    {
        base.MouseOver(evt);
        _hovered = true;
    }
 
    public override void MouseOut(UIMouseEvent evt)
    {
        base.MouseOut(evt);
        _hovered = false;
    }
 
    public void SetColor(Color color, float opacity)
    {
        _color = color;
        _opacity = opacity;
    }
 
    public void SetColorsBasedOnSelectionState(Color pickedColor, Color unpickedColor, float opacityPicked, float opacityNotPicked)
    {
        _UseOverrideColors = true;
        _overridePickedColor = pickedColor;
        _overrideUnpickedColor = unpickedColor;
        _overrideOpacityPicked = opacityPicked;
        _overrideOpacityUnpicked = opacityNotPicked;
    }
 
    public void SetBorderColor(Color color)
    {
        _borderColor = color;
    }
}