sbox-public/engine/Launcher/StandaloneTest/Widgets/StartupWindow.Toggle.cs

using Editor;

namespace Sandbox;

public partial class StartupWindow
{
	private class Toggle : Widget
	{
		public Action<bool> ValueChanged;

		private bool _value;

		public bool Value
		{
			get => _value;
			set
			{
				if ( _value == value )
					return;

				_value = value;
				Update();
				ValueChanged?.Invoke( _value );
			}
		}

		public string Text { get; set; }

		public Toggle( string text, Widget parent = null ) : base( parent )
		{
			Text = text;
		}

		protected override Vector2 SizeHint()
		{
			return new Vector2( 35, 20 );
		}

		protected override void OnPaint()
		{
			Paint.Antialiasing = true;

			var r = LocalRect;
			r.Size = new Vector2( 35, 20 );

			if ( Value )
				Paint.SetBrush( Theme.ButtonBackground );
			else
				Paint.SetBrush( Theme.ControlBackground );

			Paint.SetPen( Theme.Text.WithAlpha( 0.25f ), 1.0f );
			Paint.DrawRect( r, 10.0f );
			Paint.ClearPen();

			if ( Paint.HasMouseOver )
			{
				Paint.SetBrush( Theme.Text.WithAlpha( 0.2f ) );
				Paint.DrawRect( r, 10.0f );
			}

			r = r.Shrink( 4.0f );

			{
				var circle = r;
				circle.Size = circle.Size.WithX( circle.Size.y );

				if ( Value )
					circle.Position = circle.Position.WithX( r.Right - 12.0f );

				Paint.SetBrush( Theme.Text.WithAlpha( 0.5f ) );
				Paint.DrawRect( circle, 16.0f );
			}

			// Draw label
			if ( !string.IsNullOrEmpty( Text ) )
			{
				r = LocalRect + new Vector2( 35 + 8, 0 );
				Paint.SetDefaultFont();
				Paint.ClearBrush();
				Paint.SetPen( Theme.TextControl );
				Paint.DrawText( r, Text, TextFlag.LeftCenter );
			}
		}

		protected override void OnMouseClick( MouseEvent e )
		{
			Value = !Value;
		}
	}
}