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65 lines
2.2 KiB
C#
65 lines
2.2 KiB
C#
// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
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// See the LICENCE file in the repository root for full licence text.
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using System;
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using osu.Framework.Input.Events;
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using osu.Game.Rulesets.UI;
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using osu.Game.Rulesets.UI.Scrolling;
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namespace osu.Game.Screens.Edit.Compose.Components
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{
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/// <summary>
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/// A <see cref="DragBox"/> that scrolls along with the scrolling playfield.
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/// </summary>
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public partial class ScrollingDragBox : DragBox
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{
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public double MinTime { get; private set; }
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public double MaxTime { get; private set; }
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private double? startTime;
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private readonly ScrollingPlayfield playfield;
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public ScrollingDragBox(Playfield playfield)
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{
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this.playfield = playfield as ScrollingPlayfield ?? throw new ArgumentException("Playfield must be of type {nameof(ScrollingPlayfield)} to use this class.", nameof(playfield));
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}
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public override void HandleDrag(MouseButtonEvent e)
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{
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base.HandleDrag(e);
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startTime ??= playfield.TimeAtScreenSpacePosition(e.ScreenSpaceMouseDownPosition);
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double endTime = playfield.TimeAtScreenSpacePosition(e.ScreenSpaceMousePosition);
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MinTime = Math.Min(startTime.Value, endTime);
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MaxTime = Math.Max(startTime.Value, endTime);
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var startPos = ToLocalSpace(playfield.ScreenSpacePositionAtTime(startTime.Value));
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var endPos = ToLocalSpace(playfield.ScreenSpacePositionAtTime(endTime));
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switch (playfield.ScrollingInfo.Direction.Value)
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{
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case ScrollingDirection.Up:
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case ScrollingDirection.Down:
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Box.Y = Math.Min(startPos.Y, endPos.Y);
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Box.Height = Math.Max(startPos.Y, endPos.Y) - Box.Y;
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break;
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case ScrollingDirection.Left:
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case ScrollingDirection.Right:
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Box.X = Math.Min(startPos.X, endPos.X);
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Box.Width = Math.Max(startPos.X, endPos.X) - Box.X;
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break;
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}
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}
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public override void Hide()
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{
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base.Hide();
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startTime = null;
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}
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}
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}
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