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Use UserTrackingScrollContainer instead

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This commit is contained in:
Dean Herbert 2021-02-02 15:16:10 +09:00
parent ed63b571d2
commit 398ab9c2c2
2 changed files with 22 additions and 12 deletions
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2
osu.Game.Tests/Visual/Online/TestSceneStandAloneChatDisplay.cs
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@ -208,7 +208,7 @@ namespace osu.Game.Tests.Visual.Online
protected DrawableChannel DrawableChannel => InternalChildren.OfType<DrawableChannel>().First();
protected OsuScrollContainer ScrollContainer => (OsuScrollContainer)((Container)DrawableChannel.Child).Child;
protected UserTrackingScrollContainer ScrollContainer => (UserTrackingScrollContainer)((Container)DrawableChannel.Child).Child;
public FillFlowContainer FillFlow => (FillFlowContainer)ScrollContainer.Child;

32
osu.Game/Overlays/Chat/DrawableChannel.cs
View File

@ -16,6 +16,7 @@ using osu.Framework.Graphics.Shapes;
using osu.Game.Graphics;
using osu.Framework.Extensions.Color4Extensions;
using osu.Framework.Graphics.Sprites;
using osu.Framework.Utils;
using osu.Game.Graphics.Sprites;
namespace osu.Game.Overlays.Chat
@ -147,8 +148,8 @@ namespace osu.Game.Overlays.Chat
// due to the scroll adjusts from old messages removal above, a scroll-to-end must be enforced,
// to avoid making the container think the user has scrolled back up and unwantedly disable auto-scrolling.
if (scroll.ShouldAutoScroll || newMessages.Any(m => m is LocalMessage))
ScheduleAfterChildren(() => scroll.ScrollToEnd());
if (newMessages.Any(m => m is LocalMessage))
scroll.ScrollToEnd();
});
private void pendingMessageResolved(Message existing, Message updated) => Schedule(() =>
@ -239,7 +240,7 @@ 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 : OsuScrollContainer
private class ChannelScrollContainer : UserTrackingScrollContainer
{
/// <summary>
/// The chat will be automatically scrolled to end if and only if
@ -250,21 +251,30 @@ namespace osu.Game.Overlays.Chat
private float? lastExtent;
/// <summary>
/// Whether this container should automatically scroll to end on the next call to <see cref="UpdateAfterChildren"/>.
/// </summary>
public bool ShouldAutoScroll { get; private set; } = true;
protected override void OnUserScroll(float value, bool animated = true, double? distanceDecay = default)
{
base.OnUserScroll(value, animated, distanceDecay);
lastExtent = null;
}
protected override void UpdateAfterChildren()
{
base.UpdateAfterChildren();
if ((lastExtent == null || ScrollableExtent > lastExtent) && ShouldAutoScroll)
ScrollToEnd();
// If the user has scrolled to the bottom of the container, we should resume tracking new content.
bool cancelUserScroll = UserScrolling && IsScrolledToEnd(auto_scroll_leniency);
ShouldAutoScroll = IsScrolledToEnd(auto_scroll_leniency);
// 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 = !UserScrolling && (lastExtent == null || Precision.AlmostBigger(ScrollableExtent, lastExtent.Value));
lastExtent = ScrollableExtent;
if (cancelUserScroll || requiresScrollUpdate)
{
ScheduleAfterChildren(() =>
{
ScrollToEnd();
lastExtent = ScrollableExtent;
});
}
}
}
}