osu-lazer/osu.Game/Overlays/Profile/Sections/Beatmaps/PaginatedBeatmapContainer.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 OpenTK;
using osu.Framework.Configuration;
using osu.Framework.Graphics;
using osu.Game.Online.API.Requests;
using osu.Game.Overlays.Direct;
using osu.Game.Users;
using System.Linq;

namespace osu.Game.Overlays.Profile.Sections.Beatmaps
{
    public class PaginatedBeatmapContainer : PaginatedContainer
    {
        private const float panel_padding = 10f;

        private readonly BeatmapSetType type;

        private DirectPanel playing;

        public PaginatedBeatmapContainer(BeatmapSetType type, Bindable<User> user, string header, string missing)
            : base(user, header, missing)
        {
            this.type = type;

            ItemsPerPage = 6;

            ItemsContainer.Spacing = new Vector2(panel_padding);
            ItemsContainer.Margin = new MarginPadding { Bottom = panel_padding };
        }

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

            var req = new GetUserBeatmapsRequest(User.Value.Id, type, VisiblePages++ * ItemsPerPage);

            req.Success += sets =>
            {
                ShowMoreButton.FadeTo(sets.Count == ItemsPerPage ? 1 : 0);
                ShowMoreLoading.Hide();

                if (!sets.Any())
                {
                    MissingText.Show();
                    return;
                }

                foreach (var s in sets)
                {
                    if (!s.OnlineBeatmapSetID.HasValue)
                        continue;

                    var subReq = new GetBeatmapSetRequest(s.OnlineBeatmapSetID.Value);
                    subReq.Success += b =>
                    {
                        var panel = new DirectGridPanel(b.ToBeatmapSet(Rulesets)) { Width = 400 };
                        ItemsContainer.Add(panel);

                        panel.PreviewPlaying.ValueChanged += newValue =>
                        {
                            if (newValue)
                            {
                                if (playing != null && playing != panel)
                                    playing.PreviewPlaying.Value = false;
                                playing = panel;
                            }
                        };
                    };

                    Api.Queue(subReq);
                }
            };

            Api.Queue(req);
        }
    }
}