2020-02-14 06:36:16 +00:00
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// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
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// See the LICENCE file in the repository root for full licence text.
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using osu.Framework.Allocation;
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using osu.Framework.Bindables;
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using osu.Framework.Graphics;
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using osu.Framework.Graphics.Containers;
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using osu.Framework.Graphics.Sprites;
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using osu.Framework.Input.Events;
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using osuTK;
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using osuTK.Graphics;
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namespace osu.Game.Graphics.Containers
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{
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public abstract class OsuRearrangeableListItem<TModel> : RearrangeableListItem<TModel>
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{
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public const float FADE_DURATION = 100;
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/// <summary>
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/// Whether any item is currently being dragged. Used to hide other items' drag handles.
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/// </summary>
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2020-09-08 07:36:36 +00:00
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public readonly BindableBool DragActive = new BindableBool();
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2020-02-14 06:36:16 +00:00
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private Color4 handleColour = Color4.White;
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2020-02-14 07:09:15 +00:00
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/// <summary>
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/// The colour of the drag handle.
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/// </summary>
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2020-02-14 06:36:16 +00:00
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protected Color4 HandleColour
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{
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get => handleColour;
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set
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{
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if (handleColour == value)
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return;
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handleColour = value;
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if (handle != null)
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handle.Colour = value;
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}
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}
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2020-02-14 07:09:15 +00:00
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/// <summary>
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/// Whether the drag handle should be shown.
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/// </summary>
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2020-09-10 18:11:45 +00:00
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protected readonly Bindable<bool> ShowDragHandle = new Bindable<bool>(true);
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private Container handleContainer;
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private PlaylistItemHandle handle;
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protected OsuRearrangeableListItem(TModel item)
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: base(item)
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{
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RelativeSizeAxes = Axes.X;
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AutoSizeAxes = Axes.Y;
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}
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[BackgroundDependencyLoader]
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private void load()
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{
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InternalChild = new GridContainer
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{
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RelativeSizeAxes = Axes.X,
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AutoSizeAxes = Axes.Y,
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Content = new[]
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{
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new[]
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{
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handleContainer = new Container
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{
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Anchor = Anchor.Centre,
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Origin = Anchor.Centre,
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AutoSizeAxes = Axes.Both,
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Padding = new MarginPadding { Horizontal = 5 },
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Child = handle = new PlaylistItemHandle
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{
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Size = new Vector2(12),
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Colour = HandleColour,
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AlwaysPresent = true,
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Alpha = 0
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}
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},
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CreateContent()
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}
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},
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ColumnDimensions = new[] { new Dimension(GridSizeMode.AutoSize) },
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RowDimensions = new[] { new Dimension(GridSizeMode.AutoSize) }
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};
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}
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2020-09-08 07:36:36 +00:00
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protected override void LoadComplete()
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{
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base.LoadComplete();
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ShowDragHandle.BindValueChanged(show => handleContainer.Alpha = show.NewValue ? 1 : 0, true);
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2020-02-14 06:36:16 +00:00
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}
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protected override bool OnDragStart(DragStartEvent e)
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{
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if (!base.OnDragStart(e))
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return false;
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2020-09-08 07:36:36 +00:00
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DragActive.Value = true;
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2020-02-14 06:36:16 +00:00
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return true;
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}
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protected override void OnDragEnd(DragEndEvent e)
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{
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DragActive.Value = false;
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2020-02-14 06:36:16 +00:00
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base.OnDragEnd(e);
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}
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protected override bool IsDraggableAt(Vector2 screenSpacePos) => handle.HandlingDrag;
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protected override bool OnHover(HoverEvent e)
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{
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handle.UpdateHoverState(IsDragged || !DragActive.Value);
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return base.OnHover(e);
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}
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protected override void OnHoverLost(HoverLostEvent e) => handle.UpdateHoverState(false);
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protected abstract Drawable CreateContent();
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public class PlaylistItemHandle : SpriteIcon
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{
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public bool HandlingDrag { get; private set; }
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private bool isHovering;
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public PlaylistItemHandle()
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{
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Icon = FontAwesome.Solid.Bars;
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}
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protected override bool OnMouseDown(MouseDownEvent e)
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{
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base.OnMouseDown(e);
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HandlingDrag = true;
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UpdateHoverState(isHovering);
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return false;
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}
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protected override void OnMouseUp(MouseUpEvent e)
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{
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base.OnMouseUp(e);
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HandlingDrag = false;
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UpdateHoverState(isHovering);
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}
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public void UpdateHoverState(bool hovering)
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{
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isHovering = hovering;
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if (isHovering || HandlingDrag)
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this.FadeIn(FADE_DURATION);
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else
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this.FadeOut(FADE_DURATION);
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}
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}
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}
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}
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