TestCaseFlagContainer.cs

TestCaseFlagContainer.cs

// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE

using System.Linq;
using osu.Framework.Graphics;
using osu.Framework.Screens.Testing;
using osu.Framework.Graphics.Containers;
using osu.Framework.Graphics.Sprites;
using osu.Framework.MathUtils;
using osu.Framework.Threading;
using osu.Game.Overlays;
using OpenTK;
using OpenTK.Graphics;
using osu.Framework.Input;

namespace osu.Desktop.VisualTests.Tests
{
    class TestCaseFlagContainer : TestCase
    {
        class Flag : Box
        {
            public const float WIDTH = 60;
            public const float HEIGHT = 40;

            public override bool HandleInput => true;

            public Flag()
            {
                Size = new Vector2(WIDTH, HEIGHT);
                Colour = new Color4(RNG.NextSingle(), RNG.NextSingle(), RNG.NextSingle(), 1);
            }

            protected override bool OnClick(InputState state)
            {
                FadeOut(100);
                Expire();

                return base.OnClick(state);
            }
        }

        class FlagContainer : Container<Flag>
        {
            private const float spacing = 5;

            int expiredCount = 0;

            protected override void Update()
            {
                base.Update();

                while (Children.Count() < DrawWidth / 60)
                    addFlag();

                float pos = leftPos;

                foreach (var f in Children)
                {
                    if (f.Position.X + f.DrawSize.X < 0)
                    {
                        f.LifetimeEnd = Time.Current;
                        expiredCount++;
                    }

                    f.MoveToX(pos, 100);

                    pos += Flag.WIDTH + spacing;
                }
            }

            private float leftPos => -(float)(Time.Current / 40) + expiredCount * Flag.WIDTH;

            private void addFlag()
            {
                Add(new Flag
                {
                    X = DrawWidth + leftPos
                });
            }
        }

        public override string Name => @"Flags";
        public override string Description => @"scrolling flags";

        public override void Reset()
        {
            base.Reset();

            Add(new FlagContainer()
            {
                Anchor = Anchor.Centre,
                Origin = Anchor.Centre,
                RelativeSizeAxes = Axes.X,
                AutoSizeAxes = Axes.Y,
                Width = 1.1f,
            });
        }
    }
}