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Further refactor and simplify ChannelScrollContainer

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This commit is contained in:
Salman Ahmed
2022-03-06 23:34:12 +03:00
parent 634821e49f
commit 9bc1f3f014
3 changed files with 79 additions and 52 deletions
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50
osu.Game/Overlays/Chat/DrawableChannel.cs
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@ -11,9 +11,7 @@ using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
using osu.Framework.Graphics.Shapes;
using osu.Framework.Graphics.Sprites;
using osu.Framework.Utils;
using osu.Game.Graphics;
using osu.Game.Graphics.Containers;
using osu.Game.Graphics.Cursor;
using osu.Game.Graphics.Sprites;
using osu.Game.Online.Chat;
@ -236,53 +234,5 @@ namespace osu.Game.Overlays.Chat
};
}
}
/// <summary>
/// An <see cref="OsuScrollContainer"/> with functionality to automatically scroll whenever the maximum scrollable distance increases.
/// </summary>
private class ChannelScrollContainer : UserTrackingScrollContainer
{
/// <summary>
/// The chat will be automatically scrolled to end if and only if
/// the distance between the current scroll position and the end of the scroll
/// is less than this value.
/// </summary>
private const float auto_scroll_leniency = 10f;
private bool trackNewContent = true;
private float? lastExtent;
protected override void OnScrollChange(bool byUser)
{
base.OnScrollChange(byUser);
if (byUser)
lastExtent = null;
trackNewContent = IsScrolledToEnd(auto_scroll_leniency);
}
protected override void Update()
{
base.Update();
// If the user hasn't overridden our behaviour and there has been new content added to the container, we should update our scroll position to track it.
bool requiresScrollUpdate = trackNewContent && (lastExtent == null || Precision.AlmostBigger(ScrollableExtent, lastExtent.Value));
if (requiresScrollUpdate)
{
// Schedule required to allow FillFlow to be the correct size.
Schedule(() =>
{
if (trackNewContent)
{
if (Current < ScrollableExtent)
ScrollToEnd();
lastExtent = ScrollableExtent;
}
});
}
}
}
}
}