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osu-lazer/osu.Game.Rulesets.Mania/Edit/ManiaSelectionHandler.cs
2018-11-30 14:21:20 +09:00

126 lines
4.8 KiB
C#

// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
using System.Linq;
using osu.Framework.Allocation;
using osu.Framework.Input.Events;
using osu.Framework.Timing;
using osu.Game.Rulesets.Edit;
using osu.Game.Rulesets.Mania.Edit.Blueprints;
using osu.Game.Rulesets.Mania.Objects;
using osu.Game.Rulesets.UI;
using osu.Game.Rulesets.UI.Scrolling;
using osu.Game.Screens.Edit.Compose.Components;
using osuTK;
namespace osu.Game.Rulesets.Mania.Edit
{
public class ManiaSelectionHandler : SelectionHandler
{
[Resolved]
private IScrollingInfo scrollingInfo { get; set; }
[Resolved]
private IManiaHitObjectComposer composer { get; set; }
private IClock editorClock;
[BackgroundDependencyLoader]
private void load(IAdjustableClock clock)
{
editorClock = clock;
}
public override void HandleDrag(SelectionBlueprint blueprint, DragEvent dragEvent)
{
adjustOrigins((ManiaSelectionBlueprint)blueprint);
performDragMovement(dragEvent);
performColumnMovement(dragEvent);
base.HandleDrag(blueprint, dragEvent);
}
/// <summary>
/// Ensures that the position of hitobjects remains centred to the mouse position.
/// E.g. The hitobject position will change if the editor scrolls while a hitobject is dragged.
/// </summary>
/// <param name="reference">The <see cref="ManiaSelectionBlueprint"/> that received the drag event.</param>
private void adjustOrigins(ManiaSelectionBlueprint reference)
{
var referenceParent = (HitObjectContainer)reference.HitObject.Parent;
float offsetFromReferenceOrigin = reference.DragPosition.Y - reference.HitObject.OriginPosition.Y;
float targetPosition = referenceParent.ToLocalSpace(reference.ScreenSpaceDragPosition).Y - offsetFromReferenceOrigin;
// Flip the vertical coordinate space when scrolling downwards
if (scrollingInfo.Direction.Value == ScrollingDirection.Down)
targetPosition = targetPosition - referenceParent.DrawHeight;
float movementDelta = targetPosition - reference.HitObject.Position.Y;
foreach (var b in SelectedBlueprints.OfType<ManiaSelectionBlueprint>())
b.HitObject.Y += movementDelta;
}
private void performDragMovement(DragEvent dragEvent)
{
foreach (var b in SelectedBlueprints)
{
var hitObject = b.HitObject;
var objectParent = (HitObjectContainer)hitObject.Parent;
// Using the hitobject position is required since AdjustPosition can be invoked multiple times per frame
// without the position having been updated by the parenting ScrollingHitObjectContainer
hitObject.Y += dragEvent.Delta.Y;
float targetPosition;
// If we're scrolling downwards, a position of 0 is actually further away from the hit target
// so we need to flip the vertical coordinate in the hitobject container's space
if (scrollingInfo.Direction.Value == ScrollingDirection.Down)
targetPosition = -hitObject.Position.Y;
else
targetPosition = hitObject.Position.Y;
objectParent.Remove(hitObject);
hitObject.HitObject.StartTime = scrollingInfo.Algorithm.TimeAt(targetPosition,
editorClock.CurrentTime,
scrollingInfo.TimeRange.Value,
objectParent.DrawHeight);
objectParent.Add(hitObject);
}
}
private void performColumnMovement(DragEvent dragEvent)
{
var lastColumn = composer.ColumnAt(dragEvent.ScreenSpaceLastMousePosition);
var currentColumn = composer.ColumnAt(dragEvent.ScreenSpaceMousePosition);
if (lastColumn == null || currentColumn == null)
return;
int columnDelta = currentColumn.Index - lastColumn.Index;
if (columnDelta == 0)
return;
int minColumn = int.MaxValue;
int maxColumn = int.MinValue;
foreach (var obj in SelectedHitObjects.OfType<ManiaHitObject>())
{
if (obj.Column < minColumn)
minColumn = obj.Column;
if (obj.Column > maxColumn)
maxColumn = obj.Column;
}
columnDelta = MathHelper.Clamp(columnDelta, -minColumn, composer.TotalColumns - 1 - maxColumn);
foreach (var obj in SelectedHitObjects.OfType<ManiaHitObject>())
obj.Column += columnDelta;
}
}
}