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Add comment and reduce how often ChildrenOfType is invoked in ExpandingButtonContainer

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This commit is contained in:
Dean Herbert 2022-01-06 23:38:54 +09:00
parent 5aca2dd4ce
commit f703c5f038
1 changed files with 14 additions and 12 deletions
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26
osu.Game/Overlays/ExpandingButtonContainer.cs
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@ -65,7 +65,7 @@ namespace osu.Game.Overlays
protected override void OnHoverLost(HoverLostEvent e)
{
expandEvent?.Cancel();
lastHoveredButton = null;
hoveredButton = null;
State = ExpandedState.Contracted;
base.OnHoverLost(e);
@ -112,22 +112,24 @@ namespace osu.Game.Overlays
}
}
private Drawable lastHoveredButton;
private Drawable hoveredButton => FillFlow.ChildrenOfType<OsuButton>().FirstOrDefault(c => c.IsHovered);
private Drawable hoveredButton;
private void queueExpandIfHovering()
{
// only expand when we hover a different button.
if (lastHoveredButton == hoveredButton) return;
// if the same button is hovered, let the scheduled expand play out..
if (hoveredButton?.IsHovered == true)
return;
if (State != ExpandedState.Expanded)
{
expandEvent?.Cancel();
// ..otherwise check whether a new button is hovered, and if so, queue a new hover operation.
// usually we wouldn't use ChildrenOfType in implementations, but this is the simplest way
// to handle cases like the editor where the buttons may be nested within a child hierarchy.
hoveredButton = FillFlow.ChildrenOfType<OsuButton>().FirstOrDefault(c => c.IsHovered);
expandEvent?.Cancel();
if (hoveredButton?.IsHovered == true && State != ExpandedState.Expanded)
expandEvent = Scheduler.AddDelayed(() => State = ExpandedState.Expanded, 750);
}
lastHoveredButton = hoveredButton;
}
}