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Code Issues Releases Wiki Activity

Add composite managing display of selection box drag handles

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This commit is contained in:
Salman Ahmed 2021-04-24 08:06:00 +03:00
parent ab71782674
commit 77f7d4c963
1 changed files with 103 additions and 0 deletions
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osu.Game/Screens/Edit/Compose/Components/SelectionBoxDragHandleDisplay.cs Normal file
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// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// See the LICENCE file in the repository root for full licence text.
using System.Collections.Generic;
using System.Linq;
using JetBrains.Annotations;
using osu.Framework.Allocation;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
namespace osu.Game.Screens.Edit.Compose.Components
{
/// <summary>
/// Represents a display composite containing and managing the visibility state of the selection box's drag handles.
/// </summary>
public class SelectionBoxDragHandleDisplay : CompositeDrawable
{
private Container<SelectionBoxScaleHandle> scaleHandles;
private Container<SelectionBoxRotationHandle> rotationHandles;
private readonly List<SelectionBoxDragHandle> allDragHandles = new List<SelectionBoxDragHandle>();
public new MarginPadding Padding
{
get => base.Padding;
set => base.Padding = value;
}
[BackgroundDependencyLoader]
private void load()
{
InternalChildren = new Drawable[]
{
scaleHandles = new Container<SelectionBoxScaleHandle>
{
RelativeSizeAxes = Axes.Both,
},
rotationHandles = new Container<SelectionBoxRotationHandle>
{
RelativeSizeAxes = Axes.Both,
Padding = new MarginPadding(-12.5f),
},
};
}
public void AddScaleHandle(SelectionBoxScaleHandle handle)
{
bindDragHandle(handle);
scaleHandles.Add(handle);
}
public void AddRotationHandle(SelectionBoxRotationHandle handle)
{
handle.Alpha = 0;
handle.AlwaysPresent = true;
bindDragHandle(handle);
rotationHandles.Add(handle);
}
private void bindDragHandle(SelectionBoxDragHandle handle)
{
handle.HoverGained += updateRotationHandlesVisibility;
handle.HoverLost += updateRotationHandlesVisibility;
handle.OperationStarted += updateRotationHandlesVisibility;
handle.OperationEnded += updateRotationHandlesVisibility;
allDragHandles.Add(handle);
}
private SelectionBoxRotationHandle displayedRotationHandle;
private SelectionBoxDragHandle activeHandle;
private void updateRotationHandlesVisibility()
{
if (activeHandle?.InOperation == true || activeHandle?.IsHovered == true)
return;
displayedRotationHandle?.FadeOut(SelectionBoxControl.TRANSFORM_DURATION, Easing.OutQuint);
displayedRotationHandle = null;
activeHandle = allDragHandles.SingleOrDefault(h => h.InOperation);
activeHandle ??= allDragHandles.SingleOrDefault(h => h.IsHovered);
if (activeHandle != null)
{
displayedRotationHandle = getCorrespondingRotationHandle(activeHandle, rotationHandles);
displayedRotationHandle?.FadeIn(SelectionBoxControl.TRANSFORM_DURATION, Easing.OutQuint);
}
}
/// <summary>
/// Gets the rotation handle corresponding to the given handle.
/// </summary>
[CanBeNull]
private static SelectionBoxRotationHandle getCorrespondingRotationHandle(SelectionBoxDragHandle handle, IEnumerable<SelectionBoxRotationHandle> rotationHandles)
{
if (handle is SelectionBoxRotationHandle rotationHandle)
return rotationHandle;
return rotationHandles.SingleOrDefault(r => r.Anchor == handle.Anchor);
}
}
}