osu/osu.Game/Skinning/Editor/SkinSelectionHandler.cs

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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;
using System.Collections.Generic;
using System.Linq;
using osu.Framework.Allocation;
using osu.Framework.Extensions.EnumExtensions;
using osu.Framework.Graphics;
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using osu.Framework.Graphics.Primitives;
using osu.Framework.Graphics.UserInterface;
using osu.Framework.Utils;
using osu.Game.Extensions;
using osu.Game.Graphics.UserInterface;
using osu.Game.Rulesets.Edit;
using osu.Game.Screens.Edit.Compose.Components;
using osuTK;
namespace osu.Game.Skinning.Editor
{
public class SkinSelectionHandler : SelectionHandler<ISkinnableDrawable>
{
[Resolved]
private SkinEditor skinEditor { get; set; }
public override bool HandleRotation(float angle)
{
if (SelectedBlueprints.Count == 1)
{
// for single items, rotate around the origin rather than the selection centre.
((Drawable)SelectedBlueprints.First().Item).Rotation += angle;
}
else
{
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var selectionQuad = getSelectionQuad();
foreach (var b in SelectedBlueprints)
{
var drawableItem = (Drawable)b.Item;
var rotatedPosition = RotatePointAroundOrigin(b.ScreenSpaceSelectionPoint, selectionQuad.Centre, angle);
updateDrawablePosition(drawableItem, rotatedPosition);
drawableItem.Rotation += angle;
}
}
// this isn't always the case but let's be lenient for now.
return true;
}
public override bool HandleScale(Vector2 scale, Anchor anchor)
{
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// convert scale to screen space
scale = ToScreenSpace(scale) - ToScreenSpace(Vector2.Zero);
adjustScaleFromAnchor(ref scale, anchor);
// the selection quad is always upright, so use an AABB rect to make mutating the values easier.
var selectionRect = getSelectionQuad().AABBFloat;
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// If the selection has no area we cannot scale it
if (selectionRect.Area == 0)
return false;
// copy to mutate, as we will need to compare to the original later on.
var adjustedRect = selectionRect;
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// first, remove any scale axis we are not interested in.
if (anchor.HasFlagFast(Anchor.x1)) scale.X = 0;
if (anchor.HasFlagFast(Anchor.y1)) scale.Y = 0;
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// for now aspect lock scale adjustments that occur at corners..
if (!anchor.HasFlagFast(Anchor.x1) && !anchor.HasFlagFast(Anchor.y1))
{
// project scale vector along diagonal
Vector2 diag = (selectionRect.TopLeft - selectionRect.BottomRight).Normalized();
scale = Vector2.Dot(scale, diag) * diag;
}
// ..or if any of the selection have been rotated.
// this is to avoid requiring skew logic (which would likely not be the user's expected transform anyway).
else if (SelectedBlueprints.Any(b => !Precision.AlmostEquals(((Drawable)b.Item).Rotation, 0)))
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{
if (anchor.HasFlagFast(Anchor.x1))
// if dragging from the horizontal centre, only a vertical component is available.
scale.X = scale.Y / selectionRect.Height * selectionRect.Width;
else
// in all other cases (arbitrarily) use the horizontal component for aspect lock.
scale.Y = scale.X / selectionRect.Width * selectionRect.Height;
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}
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if (anchor.HasFlagFast(Anchor.x0)) adjustedRect.X -= scale.X;
if (anchor.HasFlagFast(Anchor.y0)) adjustedRect.Y -= scale.Y;
adjustedRect.Width += scale.X;
adjustedRect.Height += scale.Y;
// scale adjust applied to each individual item should match that of the quad itself.
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var scaledDelta = new Vector2(
MathF.Max(adjustedRect.Width / selectionRect.Width, 0),
MathF.Max(adjustedRect.Height / selectionRect.Height, 0)
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);
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foreach (var b in SelectedBlueprints)
{
var drawableItem = (Drawable)b.Item;
// each drawable's relative position should be maintained in the scaled quad.
var screenPosition = b.ScreenSpaceSelectionPoint;
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var relativePositionInOriginal =
new Vector2(
(screenPosition.X - selectionRect.TopLeft.X) / selectionRect.Width,
(screenPosition.Y - selectionRect.TopLeft.Y) / selectionRect.Height
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);
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var newPositionInAdjusted = new Vector2(
adjustedRect.TopLeft.X + adjustedRect.Width * relativePositionInOriginal.X,
adjustedRect.TopLeft.Y + adjustedRect.Height * relativePositionInOriginal.Y
);
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updateDrawablePosition(drawableItem, newPositionInAdjusted);
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drawableItem.Scale *= scaledDelta;
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}
return true;
}
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public override bool HandleFlip(Direction direction, bool flipOverOrigin)
{
var selectionQuad = getSelectionQuad();
Vector2 scaleFactor = direction == Direction.Horizontal ? new Vector2(-1, 1) : new Vector2(1, -1);
foreach (var b in SelectedBlueprints)
{
var drawableItem = (Drawable)b.Item;
var flippedPosition = GetFlippedPosition(direction, flipOverOrigin ? drawableItem.Parent.ScreenSpaceDrawQuad : selectionQuad, b.ScreenSpaceSelectionPoint);
updateDrawablePosition(drawableItem, flippedPosition);
drawableItem.Scale *= scaleFactor;
drawableItem.Rotation -= drawableItem.Rotation % 180 * 2;
}
return true;
}
public override bool HandleMovement(MoveSelectionEvent<ISkinnableDrawable> moveEvent)
{
foreach (var c in SelectedBlueprints)
{
var item = c.Item;
Drawable drawable = (Drawable)item;
drawable.Position += drawable.ScreenSpaceDeltaToParentSpace(moveEvent.ScreenSpaceDelta);
if (item.UsesFixedAnchor) continue;
applyClosestAnchor(drawable);
}
return true;
}
private static void applyClosestAnchor(Drawable drawable) => applyAnchor(drawable, getClosestAnchor(drawable));
protected override void OnSelectionChanged()
{
base.OnSelectionChanged();
SelectionBox.CanRotate = true;
SelectionBox.CanScaleX = true;
SelectionBox.CanScaleY = true;
SelectionBox.CanFlipX = true;
SelectionBox.CanFlipY = true;
SelectionBox.CanReverse = false;
}
protected override void DeleteItems(IEnumerable<ISkinnableDrawable> items) =>
skinEditor.DeleteItems(items.ToArray());
protected override IEnumerable<MenuItem> GetContextMenuItemsForSelection(IEnumerable<SelectionBlueprint<ISkinnableDrawable>> selection)
{
var closestItem = new TernaryStateRadioMenuItem("Closest", MenuItemType.Standard, _ => applyClosestAnchors())
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{
State = { Value = GetStateFromSelection(selection, c => !c.Item.UsesFixedAnchor) }
};
yield return new OsuMenuItem("Anchor")
{
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Items = createAnchorItems((d, a) => d.UsesFixedAnchor && ((Drawable)d).Anchor == a, applyFixedAnchors)
.Prepend(closestItem)
.ToArray()
};
yield return new OsuMenuItem("Origin")
{
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Items = createAnchorItems((d, o) => ((Drawable)d).Origin == o, applyOrigins).ToArray()
};
foreach (var item in base.GetContextMenuItemsForSelection(selection))
yield return item;
IEnumerable<TernaryStateMenuItem> createAnchorItems(Func<ISkinnableDrawable, Anchor, bool> checkFunction, Action<Anchor> applyFunction)
{
var displayableAnchors = new[]
{
Anchor.TopLeft,
Anchor.TopCentre,
Anchor.TopRight,
Anchor.CentreLeft,
Anchor.Centre,
Anchor.CentreRight,
Anchor.BottomLeft,
Anchor.BottomCentre,
Anchor.BottomRight,
};
return displayableAnchors.Select(a =>
{
return new TernaryStateRadioMenuItem(a.ToString(), MenuItemType.Standard, _ => applyFunction(a))
{
State = { Value = GetStateFromSelection(selection, c => checkFunction(c.Item, a)) }
};
});
}
}
private static void updateDrawablePosition(Drawable drawable, Vector2 screenSpacePosition)
{
drawable.Position =
drawable.Parent.ToLocalSpace(screenSpacePosition) - drawable.AnchorPosition;
}
private void applyOrigins(Anchor origin)
{
foreach (var item in SelectedItems)
{
var drawable = (Drawable)item;
if (origin == drawable.Origin) continue;
var previousOrigin = drawable.OriginPosition;
drawable.Origin = origin;
drawable.Position += drawable.OriginPosition - previousOrigin;
if (item.UsesFixedAnchor) continue;
applyClosestAnchor(drawable);
}
}
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/// <summary>
/// A screen-space quad surrounding all selected drawables, accounting for their full displayed size.
/// </summary>
/// <returns></returns>
private Quad getSelectionQuad() =>
GetSurroundingQuad(SelectedBlueprints.SelectMany(b => b.Item.ScreenSpaceDrawQuad.GetVertices().ToArray()));
private void applyFixedAnchors(Anchor anchor)
{
foreach (var item in SelectedItems)
{
var drawable = (Drawable)item;
item.UsesFixedAnchor = true;
applyAnchor(drawable, anchor);
}
}
private void applyClosestAnchors()
{
foreach (var item in SelectedItems)
{
item.UsesFixedAnchor = false;
applyClosestAnchor((Drawable)item);
}
}
private static Anchor getClosestAnchor(Drawable drawable)
{
var parent = drawable.Parent;
if (parent == null)
return drawable.Anchor;
var screenPosition = getScreenPosition();
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var absolutePosition = parent.ToLocalSpace(screenPosition);
var factor = parent.RelativeToAbsoluteFactor;
var result = default(Anchor);
static Anchor getAnchorFromPosition(float xOrY, Anchor anchor0, Anchor anchor1, Anchor anchor2)
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{
if (xOrY >= 2 / 3f)
return anchor2;
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if (xOrY >= 1 / 3f)
return anchor1;
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return anchor0;
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}
result |= getAnchorFromPosition(absolutePosition.X / factor.X, Anchor.x0, Anchor.x1, Anchor.x2);
result |= getAnchorFromPosition(absolutePosition.Y / factor.Y, Anchor.y0, Anchor.y1, Anchor.y2);
return result;
Vector2 getScreenPosition()
{
var quad = drawable.ScreenSpaceDrawQuad;
var origin = drawable.Origin;
var pos = quad.TopLeft;
if (origin.HasFlagFast(Anchor.x2))
pos.X += quad.Width;
else if (origin.HasFlagFast(Anchor.x1))
pos.X += quad.Width / 2f;
if (origin.HasFlagFast(Anchor.y2))
pos.Y += quad.Height;
else if (origin.HasFlagFast(Anchor.y1))
pos.Y += quad.Height / 2f;
return pos;
}
}
private static void applyAnchor(Drawable drawable, Anchor anchor)
{
if (anchor == drawable.Anchor) return;
var previousAnchor = drawable.AnchorPosition;
drawable.Anchor = anchor;
drawable.Position -= drawable.AnchorPosition - previousAnchor;
}
private static void adjustScaleFromAnchor(ref Vector2 scale, Anchor reference)
{
// cancel out scale in axes we don't care about (based on which drag handle was used).
if ((reference & Anchor.x1) > 0) scale.X = 0;
if ((reference & Anchor.y1) > 0) scale.Y = 0;
// reverse the scale direction if dragging from top or left.
if ((reference & Anchor.x0) > 0) scale.X = -scale.X;
if ((reference & Anchor.y0) > 0) scale.Y = -scale.Y;
}
}
}