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using System;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using System.Collections.Generic;
using System.Linq;
using V3.Input;
namespace V3.Widgets
{
// ReSharper disable once ClassNeverInstantiated.Global
public sealed class SelectButton : AbstractTextWidget, IClickable
{
public List<string> Values { get; } = new List<string>();
public int SelectedIndex { get; set; }
public bool IsClicked { get; set; }
public bool IsEnabled { get; set; } = true;
private readonly ContentManager mContentManager;
private Texture2D mTriangle;
private Rectangle mBoxArrowLeft;
private Rectangle mBoxArrowRight;
public SelectButton(ContentManager contentManager) : base(contentManager)
{
mContentManager = contentManager;
}
public override void Initialize()
{
mTriangle = mContentManager.Load<Texture2D>("Menu/arrow_white");
base.Initialize();
}
public void HandleMouseEvent(IMouseEvent mouseEvent)
{
if (mouseEvent.MouseButton == MouseButton.Left && mouseEvent.ButtonState == ButtonState.Released)
{
if (!mouseEvent.PositionReleased.HasValue)
return;
var rectangle = new Rectangle((int)Position.X, (int)Position.Y, (int)Size.X, (int)Size.Y);
var position = mouseEvent.PositionReleased.Value;
if (rectangle.Contains(position))
IsClicked = true;
int change;
if (mBoxArrowLeft.Contains(position))
change = -1;
else if (mBoxArrowRight.Contains(position))
change = 1;
else
return;
SelectedIndex += change;
if (SelectedIndex < 0)
SelectedIndex += Values.Count;
if (SelectedIndex >= Values.Count)
SelectedIndex -= Values.Count;
}
}
public override void Draw(SpriteBatch spriteBatch)
{
UpdateSelection();
var arrowPadding = 30;
var arrowLength = 20;
var arrowY = (int)Position.Y + (int)(Size.Y / 2) - arrowLength / 2;
mBoxArrowLeft = new Rectangle((int)Position.X + arrowPadding,
arrowY, arrowLength, arrowLength);
mBoxArrowRight = new Rectangle((int)Position.X + (int)Size.X - arrowPadding,
arrowY, arrowLength, arrowLength);
spriteBatch.Draw(mTriangle, mBoxArrowLeft, null, Color.Gray, 0, new Vector2(0, 0), SpriteEffects.FlipHorizontally, 0);
spriteBatch.Draw(mTriangle, mBoxArrowRight, Color.Gray);
base.Draw(spriteBatch);
}
public override Vector2 GetMinimumSize()
{
Vector2 size;
try
{
size = new Vector2(Values.Max(v => Font.MeasureString(v).X), Font.MeasureString(Text).Y);
}
catch (ArgumentException)
{
// Return whatever.
size = new Vector2(100, 40);
}
size.X += 2 * PaddingX;
size.Y += 2 * PaddingY;
return size;
}
private void UpdateSelection()
{
Text = Values[SelectedIndex];
}
}
}
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