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98 lines
2.9 KiB
C#
98 lines
2.9 KiB
C#
// 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 System;
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using osu.Framework.Allocation;
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using osu.Framework.Graphics.Containers;
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using osu.Framework.Input.Events;
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using osu.Framework.Threading;
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using osuTK;
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namespace osu.Game.Screens.Play.HUD
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{
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public abstract partial class SongProgressBar : CompositeDrawable
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{
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/// <summary>
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/// The current seek position of the audio, on a (0..1) range.
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/// This is generally the seek target, which will eventually match the gameplay clock when it catches up.
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/// </summary>
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protected double AudioProgress => length == 0 ? 1 : AudioTime / length;
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/// <summary>
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/// The current (non-frame-stable) audio time.
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/// </summary>
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protected double AudioTime => Math.Clamp(GameplayClock.CurrentTime - StartTime, 0.0, length);
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[Resolved]
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protected IGameplayClock GameplayClock { get; private set; } = null!;
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/// <summary>
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/// Action which is invoked when a seek is requested, with the proposed millisecond value for the seek operation.
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/// </summary>
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public Action<double>? OnSeek { get; set; }
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/// <summary>
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/// Whether the progress bar should allow interaction, ie. to perform seek operations.
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/// </summary>
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public virtual bool Interactive { get; set; }
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public double StartTime { get; set; }
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public double EndTime { get; set; } = 1.0;
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private double length => EndTime - StartTime;
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private bool handleClick;
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protected override bool OnMouseDown(MouseDownEvent e)
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{
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handleClick = true;
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return base.OnMouseDown(e);
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}
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protected override bool OnClick(ClickEvent e)
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{
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if (handleClick)
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handleMouseInput(e);
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return true;
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}
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protected override void OnDrag(DragEvent e)
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{
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handleMouseInput(e);
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}
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protected override bool OnDragStart(DragStartEvent e)
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{
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Vector2 posDiff = e.MouseDownPosition - e.MousePosition;
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if (Math.Abs(posDiff.X) < Math.Abs(posDiff.Y))
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{
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handleClick = false;
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return false;
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}
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handleMouseInput(e);
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return true;
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}
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private void handleMouseInput(UIEvent e)
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{
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if (!Interactive)
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return;
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double relativeX = Math.Clamp(ToLocalSpace(e.ScreenSpaceMousePosition).X / DrawWidth, 0, 1);
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onUserChange(StartTime + (EndTime - StartTime) * relativeX);
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}
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private ScheduledDelegate? scheduledSeek;
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private void onUserChange(double value)
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{
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scheduledSeek?.Cancel();
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scheduledSeek = Schedule(() => OnSeek?.Invoke(value));
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}
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}
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}
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