128 lines
3.9 KiB
C#
128 lines
3.9 KiB
C#
using System;
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using UnityEngine;
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namespace UnityEditor.U2D.Animation
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{
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internal class Brush
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{
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private static readonly float kWheelSizeSpeed = 1f;
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private static readonly int kBrushHashCode = "Brush".GetHashCode();
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private IGUIWrapper m_GUIWrapper;
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private float m_DeltaAcc = 0f;
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private int m_ControlID = -1;
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private SliderData m_SliderData = SliderData.zero;
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public event Action<Brush> onMove = (b) => {};
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public event Action<Brush> onSize = (b) => {};
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public event Action<Brush> onRepaint = (b) => {};
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public event Action<Brush> onStrokeBegin = (b) => {};
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public event Action<Brush> onStrokeDelta = (b) => {};
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public event Action<Brush> onStrokeStep = (b) => {};
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public event Action<Brush> onStrokeEnd = (b) => {};
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public bool isHot
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{
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get { return m_GUIWrapper.IsControlHot(m_ControlID); }
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}
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public bool isActivable
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{
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get { return m_GUIWrapper.IsControlHot(0) && m_GUIWrapper.IsControlNearest(m_ControlID); }
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}
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public int controlID
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{
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get { return m_ControlID; }
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}
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public float hardness { get; set; }
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public float step { get; set; }
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public float size { get; set; }
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public Vector3 position
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{
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get { return m_SliderData.position; }
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}
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public Brush(IGUIWrapper guiWrapper)
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{
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m_GUIWrapper = guiWrapper;
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size = 25f;
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step = 20f;
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}
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public void OnGUI()
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{
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m_ControlID = m_GUIWrapper.GetControlID(kBrushHashCode, FocusType.Passive);
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var eventType = m_GUIWrapper.eventType;
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if (!m_GUIWrapper.isAltDown)
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m_GUIWrapper.LayoutControl(controlID, 0f);
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if (isActivable)
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{
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m_SliderData.position = m_GUIWrapper.GUIToWorld(m_GUIWrapper.mousePosition);
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if (m_GUIWrapper.IsMouseDown(0))
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{
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m_DeltaAcc = 0f;
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onStrokeBegin(this);
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onStrokeStep(this);
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m_GUIWrapper.SetGuiChanged(true);
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}
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if (eventType == EventType.MouseMove)
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{
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onMove(this);
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m_GUIWrapper.UseCurrentEvent();
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}
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if (m_GUIWrapper.isShiftDown && eventType == EventType.ScrollWheel)
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{
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var sizeDelta = HandleUtility.niceMouseDeltaZoom * kWheelSizeSpeed;
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size = Mathf.Max(1f, size + sizeDelta);
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onSize(this);
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m_GUIWrapper.UseCurrentEvent();
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}
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}
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if (isHot && m_GUIWrapper.IsMouseUp(0))
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onStrokeEnd(this);
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if (m_GUIWrapper.IsRepainting() && (isHot || isActivable))
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onRepaint(this);
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Vector3 position;
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if (m_GUIWrapper.DoSlider(m_ControlID, m_SliderData, out position))
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{
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step = Mathf.Max(step, 1f);
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var delta = position - m_SliderData.position;
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var direction = delta.normalized;
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var magnitude = delta.magnitude;
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m_SliderData.position -= direction * m_DeltaAcc;
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m_DeltaAcc += magnitude;
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if (m_DeltaAcc >= step)
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{
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var stepVector = direction * step;
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while (m_DeltaAcc >= step)
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{
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m_SliderData.position += stepVector;
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onMove(this);
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onStrokeStep(this);
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m_DeltaAcc -= step;
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}
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}
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m_SliderData.position = position;
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onStrokeDelta(this);
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}
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}
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}
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}
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