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Code Issues Releases Wiki Activity

Selection support of SectionsContainer.

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This commit is contained in:
Huo Yaoyuan 2017-05-20 06:39:01 +08:00
parent 058c5e18a4
commit e06c917c95
1 changed files with 28 additions and 0 deletions
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28
osu.Game/Graphics/Containers/SectionsContainer.cs
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@ -4,6 +4,7 @@
using System;
using System.Collections.Generic;
using System.Linq;
using osu.Framework.Configuration;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
@ -47,6 +48,9 @@ namespace osu.Game.Graphics.Containers
}
}
public Bindable<Drawable> SelectedSection { get; } = new Bindable<Drawable>();
public void ScrollToSection(Drawable section) => scrollContainer.ScrollIntoView(section);
private List<Drawable> sections = new List<Drawable>();
public IEnumerable<Drawable> Sections
{
@ -64,6 +68,7 @@ namespace osu.Game.Graphics.Containers
originalSectionMargin = sections[0].Margin;
updateSectionMargin();
scrollContainer.Add(sections);
SelectedSection.Value = sections[0];
}
}
@ -86,6 +91,7 @@ namespace osu.Game.Graphics.Containers
});
}
float lastKnownScroll;
protected override void UpdateAfterChildren()
{
base.UpdateAfterChildren();
@ -96,6 +102,28 @@ namespace osu.Game.Graphics.Containers
expandableHeader.Y = -offset;
fixedHeader.Y = -offset + expandableHeader.Height;
float currentScroll = scrollContainer.Current;
if (currentScroll != lastKnownScroll)
{
lastKnownScroll = currentScroll;
Drawable bestMatch = null;
float minDiff = float.MaxValue;
foreach (var section in sections)
{
float diff = Math.Abs(scrollContainer.GetChildPosInContent(section) - currentScroll);
if (diff < minDiff)
{
minDiff = diff;
bestMatch = section;
}
}
if (bestMatch != null)
SelectedSection.Value = bestMatch;
}
}
}
}