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172 lines
5.6 KiB
C#
172 lines
5.6 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 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.Game.Graphics.Sprites;
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using System;
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using System.Collections.Generic;
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using osu.Framework.Bindables;
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using osuTK.Graphics;
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namespace osu.Game.Graphics.UserInterface
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{
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public abstract class RollingCounter<T> : Container, IHasAccentColour
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where T : struct, IEquatable<T>
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{
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/// <summary>
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/// The current value.
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/// </summary>
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public Bindable<T> Current = new Bindable<T>();
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protected SpriteText DisplayedCountSpriteText;
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/// <summary>
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/// If true, the roll-up duration will be proportional to change in value.
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/// </summary>
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protected virtual bool IsRollingProportional => false;
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/// <summary>
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/// If IsRollingProportional = false, duration in milliseconds for the counter roll-up animation for each
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/// element; else duration in milliseconds for the counter roll-up animation in total.
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/// </summary>
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protected virtual double RollingDuration => 0;
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/// <summary>
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/// Easing for the counter rollover animation.
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/// </summary>
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protected virtual Easing RollingEasing => Easing.OutQuint;
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private T displayedCount;
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/// <summary>
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/// Value shown at the current moment.
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/// </summary>
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public virtual T DisplayedCount
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{
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get => displayedCount;
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set
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{
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if (EqualityComparer<T>.Default.Equals(displayedCount, value))
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return;
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displayedCount = value;
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DisplayedCountSpriteText.Text = FormatCount(value);
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}
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}
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public abstract void Increment(T amount);
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public float TextSize
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{
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get => DisplayedCountSpriteText.Font.Size;
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set => DisplayedCountSpriteText.Font = DisplayedCountSpriteText.Font.With(size: value);
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}
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public Color4 AccentColour
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{
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get => DisplayedCountSpriteText.Colour;
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set => DisplayedCountSpriteText.Colour = value;
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}
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/// <summary>
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/// Skeleton of a numeric counter which value rolls over time.
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/// </summary>
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protected RollingCounter()
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{
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Children = new Drawable[]
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{
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DisplayedCountSpriteText = new OsuSpriteText { Font = OsuFont.Numeric }
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};
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TextSize = 40;
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AutoSizeAxes = Axes.Both;
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DisplayedCount = Current.Value;
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Current.ValueChanged += val =>
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{
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if (IsLoaded) TransformCount(displayedCount, val.NewValue);
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};
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}
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protected override void LoadComplete()
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{
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base.LoadComplete();
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DisplayedCountSpriteText.Text = FormatCount(Current.Value);
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}
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/// <summary>
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/// Sets count value, bypassing rollover animation.
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/// </summary>
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/// <param name="count">New count value.</param>
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public virtual void SetCountWithoutRolling(T count)
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{
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Current.Value = count;
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StopRolling();
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}
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/// <summary>
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/// Stops rollover animation, forcing the displayed count to be the actual count.
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/// </summary>
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public virtual void StopRolling()
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{
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FinishTransforms(false, nameof(DisplayedCount));
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DisplayedCount = Current.Value;
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}
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/// <summary>
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/// Resets count to default value.
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/// </summary>
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public virtual void ResetCount()
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{
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SetCountWithoutRolling(default);
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}
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/// <summary>
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/// Calculates the duration of the roll-up animation by using the difference between the current visible value
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/// and the new final value.
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/// </summary>
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/// <remarks>
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/// To be used in conjunction with IsRollingProportional = true.
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/// Unless a derived class needs to have a proportional rolling, it is not necessary to override this function.
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/// </remarks>
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/// <param name="currentValue">Current visible value.</param>
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/// <param name="newValue">New final value.</param>
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/// <returns>Calculated rollover duration in milliseconds.</returns>
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protected virtual double GetProportionalDuration(T currentValue, T newValue)
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{
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return RollingDuration;
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}
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/// <summary>
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/// Used to format counts.
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/// </summary>
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/// <param name="count">Count to format.</param>
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/// <returns>Count formatted as a string.</returns>
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protected virtual string FormatCount(T count)
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{
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return count.ToString();
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}
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/// <summary>
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/// Called when the count is updated to add a transformer that changes the value of the visible count (i.e.
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/// implement the rollover animation).
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/// </summary>
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/// <param name="currentValue">Count value before modification.</param>
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/// <param name="newValue">Expected count value after modification.</param>
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protected virtual void TransformCount(T currentValue, T newValue)
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{
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double rollingTotalDuration =
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IsRollingProportional
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? GetProportionalDuration(currentValue, newValue)
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: RollingDuration;
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this.TransformTo(nameof(DisplayedCount), newValue, rollingTotalDuration, RollingEasing);
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}
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}
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}
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