osu/osu.Game/Overlays/Music/PlaylistList.cs

256 lines
8.9 KiB
C#

// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
using System;
using System.Collections.Generic;
using System.Linq;
using osu.Framework.Extensions.IEnumerableExtensions;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
using osu.Framework.Input;
using osu.Game.Beatmaps;
using osu.Game.Graphics.Containers;
using OpenTK;
namespace osu.Game.Overlays.Music
{
public class PlaylistList : CompositeDrawable
{
public Action<BeatmapSetInfo> OnSelect;
private readonly ItemsScrollContainer items;
public PlaylistList()
{
InternalChild = items = new ItemsScrollContainer
{
RelativeSizeAxes = Axes.Both,
OnSelect = set => OnSelect?.Invoke(set)
};
}
public new MarginPadding Padding
{
get { return base.Padding; }
set { base.Padding = value; }
}
public IEnumerable<BeatmapSetInfo> BeatmapSets
{
get { return items.Sets; }
set { items.Sets = value; }
}
public BeatmapSetInfo FirstVisibleSet => items.FirstVisibleSet;
public BeatmapSetInfo NextSet => items.NextSet;
public BeatmapSetInfo PreviousSet => items.PreviousSet;
public BeatmapSetInfo SelectedSet
{
get { return items.SelectedSet; }
set { items.SelectedSet = value; }
}
public void AddBeatmapSet(BeatmapSetInfo beatmapSet) => items.AddBeatmapSet(beatmapSet);
public void RemoveBeatmapSet(BeatmapSetInfo beatmapSet) => items.RemoveBeatmapSet(beatmapSet);
public void Filter(string searchTerm) => items.SearchTerm = searchTerm;
private class ItemsScrollContainer : OsuScrollContainer
{
public Action<BeatmapSetInfo> OnSelect;
private readonly SearchContainer search;
private readonly FillFlowContainer<PlaylistItem> items;
public ItemsScrollContainer()
{
Children = new Drawable[]
{
search = new SearchContainer
{
RelativeSizeAxes = Axes.X,
AutoSizeAxes = Axes.Y,
Children = new Drawable[]
{
items = new ItemSearchContainer
{
RelativeSizeAxes = Axes.X,
AutoSizeAxes = Axes.Y,
},
}
}
};
}
public IEnumerable<BeatmapSetInfo> Sets
{
get { return items.Select(x => x.BeatmapSetInfo).ToList(); }
set
{
items.Clear();
value.ForEach(AddBeatmapSet);
}
}
public string SearchTerm
{
get { return search.SearchTerm; }
set { search.SearchTerm = value; }
}
public void AddBeatmapSet(BeatmapSetInfo beatmapSet)
{
var newItem = new PlaylistItem(beatmapSet) { OnSelect = set => OnSelect?.Invoke(set) };
items.Add(newItem);
items.SetLayoutPosition(newItem, items.Count);
}
public void RemoveBeatmapSet(BeatmapSetInfo beatmapSet)
{
var itemToRemove = items.FirstOrDefault(i => i.BeatmapSetInfo.ID == beatmapSet.ID);
if (itemToRemove != null)
items.Remove(itemToRemove);
}
public BeatmapSetInfo SelectedSet
{
get { return items.FirstOrDefault(i => i.Selected)?.BeatmapSetInfo; }
set
{
foreach (PlaylistItem s in items.Children)
s.Selected = s.BeatmapSetInfo.ID == value?.ID;
}
}
public BeatmapSetInfo FirstVisibleSet => items.FirstOrDefault(i => i.MatchingFilter)?.BeatmapSetInfo;
public BeatmapSetInfo NextSet => (items.SkipWhile(i => !i.Selected).Skip(1).FirstOrDefault() ?? items.FirstOrDefault())?.BeatmapSetInfo;
public BeatmapSetInfo PreviousSet => (items.TakeWhile(i => !i.Selected).LastOrDefault() ?? items.LastOrDefault())?.BeatmapSetInfo;
private Vector2 nativeDragPosition;
private PlaylistItem draggedItem;
protected override bool OnDragStart(InputState state)
{
nativeDragPosition = state.Mouse.NativeState.Position;
draggedItem = items.FirstOrDefault(d => d.IsDraggable);
return draggedItem != null || base.OnDragStart(state);
}
protected override bool OnDrag(InputState state)
{
nativeDragPosition = state.Mouse.NativeState.Position;
if (draggedItem == null)
return base.OnDrag(state);
return true;
}
protected override bool OnDragEnd(InputState state)
{
nativeDragPosition = state.Mouse.NativeState.Position;
var handled = draggedItem != null || base.OnDragEnd(state);
draggedItem = null;
return handled;
}
protected override void Update()
{
base.Update();
if (draggedItem == null)
return;
updateScrollPosition();
updateDragPosition();
}
private void updateScrollPosition()
{
const float start_offset = 10;
const double max_power = 50;
const double exp_base = 1.05;
var localPos = ToLocalSpace(nativeDragPosition);
if (localPos.Y < start_offset)
{
if (Current <= 0)
return;
var power = Math.Min(max_power, Math.Abs(start_offset - localPos.Y));
ScrollBy(-(float)Math.Pow(exp_base, power));
}
else if (localPos.Y > DrawHeight - start_offset)
{
if (IsScrolledToEnd())
return;
var power = Math.Min(max_power, Math.Abs(DrawHeight - start_offset - localPos.Y));
ScrollBy((float)Math.Pow(exp_base, power));
}
}
private void updateDragPosition()
{
var itemsPos = items.ToLocalSpace(nativeDragPosition);
int srcIndex = (int)items.GetLayoutPosition(draggedItem);
// Find the last item with position < mouse position. Note we can't directly use
// the item positions as they are being transformed
float heightAccumulator = 0;
int dstIndex = 0;
for (; dstIndex < items.Count; dstIndex++)
{
// Using BoundingBox here takes care of scale, paddings, etc...
heightAccumulator += items[dstIndex].BoundingBox.Height;
if (heightAccumulator > itemsPos.Y)
break;
}
dstIndex = MathHelper.Clamp(dstIndex, 0, items.Count - 1);
if (srcIndex == dstIndex)
return;
if (srcIndex < dstIndex)
{
for (int i = srcIndex + 1; i <= dstIndex; i++)
items.SetLayoutPosition(items[i], i - 1);
}
else
{
for (int i = dstIndex; i < srcIndex; i++)
items.SetLayoutPosition(items[i], i + 1);
}
items.SetLayoutPosition(draggedItem, dstIndex);
}
private class ItemSearchContainer : FillFlowContainer<PlaylistItem>, IHasFilterableChildren
{
public IEnumerable<string> FilterTerms => new string[] { };
public bool MatchingFilter
{
set
{
if (value)
InvalidateLayout();
}
}
public IEnumerable<IFilterable> FilterableChildren => Children;
public ItemSearchContainer()
{
LayoutDuration = 200;
LayoutEasing = Easing.OutQuint;
}
}
}
}
}