using UnityEngine;
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using UnityEditor;
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using System.Collections;
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[System.Serializable]
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public class ZoomArea
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{
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// Global state
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private static Vector2 m_MouseDownPosition = new Vector2(-1000000, -1000000); // in transformed space
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private static int zoomableAreaHash = "ZoomableArea".GetHashCode();
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// Range lock settings
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[SerializeField]
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private bool m_HRangeLocked;
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[SerializeField]
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private bool m_VRangeLocked;
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public bool hRangeLocked { get { return m_HRangeLocked; } set { m_HRangeLocked = value; } }
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public bool vRangeLocked { get { return m_VRangeLocked; } set { m_VRangeLocked = value; } }
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[SerializeField]
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private float m_HBaseRangeMin = 0;
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[SerializeField]
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private float m_HBaseRangeMax = 1;
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[SerializeField]
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private float m_VBaseRangeMin = 0;
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[SerializeField]
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private float m_VBaseRangeMax = 1;
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public float hBaseRangeMin { get { return m_HBaseRangeMin; } set { m_HBaseRangeMin = value; } }
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public float hBaseRangeMax { get { return m_HBaseRangeMax; } set { m_HBaseRangeMax = value; } }
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public float vBaseRangeMin { get { return m_VBaseRangeMin; } set { m_VBaseRangeMin = value; } }
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public float vBaseRangeMax { get { return m_VBaseRangeMax; } set { m_VBaseRangeMax = value; } }
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[SerializeField]
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private bool m_HAllowExceedBaseRangeMin = true;
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[SerializeField]
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private bool m_HAllowExceedBaseRangeMax = true;
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[SerializeField]
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private bool m_VAllowExceedBaseRangeMin = true;
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[SerializeField]
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private bool m_VAllowExceedBaseRangeMax = true;
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public bool hAllowExceedBaseRangeMin { get { return m_HAllowExceedBaseRangeMin; } set { m_HAllowExceedBaseRangeMin = value; } }
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public bool hAllowExceedBaseRangeMax { get { return m_HAllowExceedBaseRangeMax; } set { m_HAllowExceedBaseRangeMax = value; } }
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public bool vAllowExceedBaseRangeMin { get { return m_VAllowExceedBaseRangeMin; } set { m_VAllowExceedBaseRangeMin = value; } }
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public bool vAllowExceedBaseRangeMax { get { return m_VAllowExceedBaseRangeMax; } set { m_VAllowExceedBaseRangeMax = value; } }
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public float hRangeMin
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{
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get { return (hAllowExceedBaseRangeMin ? Mathf.NegativeInfinity : hBaseRangeMin); }
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set { SetAllowExceed(ref m_HBaseRangeMin, ref m_HAllowExceedBaseRangeMin, value); }
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}
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public float hRangeMax
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{
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get { return (hAllowExceedBaseRangeMax ? Mathf.Infinity : hBaseRangeMax); }
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set { SetAllowExceed(ref m_HBaseRangeMax, ref m_HAllowExceedBaseRangeMax, value); }
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}
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public float vRangeMin
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{
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get { return (vAllowExceedBaseRangeMin ? Mathf.NegativeInfinity : vBaseRangeMin); }
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set { SetAllowExceed(ref m_VBaseRangeMin, ref m_VAllowExceedBaseRangeMin, value); }
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}
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public float vRangeMax
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{
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get { return (vAllowExceedBaseRangeMax ? Mathf.Infinity : vBaseRangeMax); }
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set { SetAllowExceed(ref m_VBaseRangeMax, ref m_VAllowExceedBaseRangeMax, value); }
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}
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private void SetAllowExceed(ref float rangeEnd, ref bool allowExceed, float value)
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{
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if (value == Mathf.NegativeInfinity || value == Mathf.Infinity)
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{
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rangeEnd = (value == Mathf.NegativeInfinity ? 0 : 1);
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allowExceed = true;
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}
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else
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{
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rangeEnd = value;
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allowExceed = false;
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}
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}
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private float m_HScaleMin = 0.001f;
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private float m_HScaleMax = 100000.0f;
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private float m_VScaleMin = 0.001f;
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private float m_VScaleMax = 100000.0f;
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// Window resize settings
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[SerializeField]
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private bool m_ScaleWithWindow = false;
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public bool scaleWithWindow { get { return m_ScaleWithWindow; } set { m_ScaleWithWindow = value; } }
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// Slider settings
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[SerializeField]
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private bool m_HSlider = true;
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[SerializeField]
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private bool m_VSlider = true;
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public bool hSlider { get { return m_HSlider; } set { Rect r = rect; m_HSlider = value; rect = r; } }
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public bool vSlider { get { return m_VSlider; } set { Rect r = rect; m_VSlider = value; rect = r; } }
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[SerializeField]
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private bool m_IgnoreScrollWheelUntilClicked = false;
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public bool ignoreScrollWheelUntilClicked { get { return m_IgnoreScrollWheelUntilClicked; } set { m_IgnoreScrollWheelUntilClicked = value; } }
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public bool m_UniformScale;
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public bool uniformScale { get { return m_UniformScale; } set { m_UniformScale = value; } }
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// View and drawing settings
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[SerializeField]
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private Rect m_DrawArea = new Rect(0, 0, 100, 100);
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internal void SetDrawRectHack(Rect r) { m_DrawArea = r; }
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[SerializeField]
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internal Vector2 m_Scale = new Vector2(1, -1);
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[SerializeField]
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internal Vector2 m_Translation = new Vector2(0, 0);
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[SerializeField]
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private float m_MarginLeft, m_MarginRight, m_MarginTop, m_MarginBottom;
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[SerializeField]
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private Rect m_LastShownAreaInsideMargins = new Rect(0, 0, 100, 100);
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public Vector2 scale { get { return m_Scale; } }
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public float margin { set { m_MarginLeft = m_MarginRight = m_MarginTop = m_MarginBottom = value; } }
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public float leftmargin { get { return m_MarginLeft; } set { m_MarginLeft = value; } }
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public float rightmargin { get { return m_MarginRight; } set { m_MarginRight = value; } }
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public float topmargin { get { return m_MarginTop; } set { m_MarginTop = value; } }
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public float bottommargin { get { return m_MarginBottom; } set { m_MarginBottom = value; } }
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[SerializeField]
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bool m_MinimalGUI;
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[System.Serializable]
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public class Styles
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{
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#if UNITY_5_5_OR_NEWER
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public GUIStyle background = "AnimationKeyframeBackground";
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#else
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public GUIStyle background = "AnimationCurveEditorBackground";
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#endif
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public GUIStyle horizontalScrollbar;
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public GUIStyle horizontalMinMaxScrollbarThumb;
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public GUIStyle horizontalScrollbarLeftButton;
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public GUIStyle horizontalScrollbarRightButton;
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public GUIStyle verticalScrollbar;
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public GUIStyle verticalMinMaxScrollbarThumb;
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public GUIStyle verticalScrollbarUpButton;
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public GUIStyle verticalScrollbarDownButton;
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public float sliderWidth;
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public float visualSliderWidth;
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public Styles(bool minimalGUI)
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{
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if (minimalGUI)
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{
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visualSliderWidth = 0;
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sliderWidth = 15;
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}
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else
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{
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visualSliderWidth = 15;
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sliderWidth = 15;
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}
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}
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public void InitGUIStyles(bool minimalGUI)
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{
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if (minimalGUI)
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{
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horizontalMinMaxScrollbarThumb = "MiniMinMaxSliderHorizontal";
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horizontalScrollbarLeftButton = GUIStyle.none;
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horizontalScrollbarRightButton = GUIStyle.none;
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horizontalScrollbar = GUIStyle.none;
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verticalMinMaxScrollbarThumb = "MiniMinMaxSlidervertical";
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verticalScrollbarUpButton = GUIStyle.none;
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verticalScrollbarDownButton = GUIStyle.none;
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verticalScrollbar = GUIStyle.none;
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}
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else
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{
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horizontalMinMaxScrollbarThumb = "horizontalMinMaxScrollbarThumb";
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horizontalScrollbarLeftButton = "horizontalScrollbarLeftbutton";
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horizontalScrollbarRightButton = "horizontalScrollbarRightbutton";
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horizontalScrollbar = GUI.skin.horizontalScrollbar;
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verticalMinMaxScrollbarThumb = "verticalMinMaxScrollbarThumb";
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verticalScrollbarUpButton = "verticalScrollbarUpbutton";
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verticalScrollbarDownButton = "verticalScrollbarDownbutton";
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verticalScrollbar = GUI.skin.verticalScrollbar;
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}
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}
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}
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private Styles m_Styles;
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private Styles styles
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{
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get
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{
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if (m_Styles == null)
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m_Styles = new Styles(m_MinimalGUI);
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return m_Styles;
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}
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}
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public Rect rect
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{
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get { return new Rect(drawRect.x, drawRect.y, drawRect.width + (m_VSlider ? styles.visualSliderWidth : 0), drawRect.height + (m_HSlider ? styles.visualSliderWidth : 0)); }
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set
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{
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Rect newDrawArea = new Rect(value.x, value.y, value.width - (m_VSlider ? styles.visualSliderWidth : 0), value.height - (m_HSlider ? styles.visualSliderWidth : 0));
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if (newDrawArea != m_DrawArea)
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{
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if (m_ScaleWithWindow)
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{
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m_DrawArea = newDrawArea;
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shownAreaInsideMargins = m_LastShownAreaInsideMargins;
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}
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else
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{
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m_Translation += new Vector2((newDrawArea.width - m_DrawArea.width) / 2, (newDrawArea.height - m_DrawArea.height) / 2);
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m_DrawArea = newDrawArea;
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}
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}
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EnforceScaleAndRange();
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}
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}
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public Rect drawRect { get { return m_DrawArea; } }
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public void SetShownHRangeInsideMargins(float min, float max)
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{
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m_Scale.x = (drawRect.width - leftmargin - rightmargin) / (max - min);
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m_Translation.x = -min * m_Scale.x + leftmargin;
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EnforceScaleAndRange();
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}
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public void SetShownHRange(float min, float max)
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{
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m_Scale.x = drawRect.width / (max - min);
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m_Translation.x = -min * m_Scale.x;
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EnforceScaleAndRange();
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}
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public void SetShownVRangeInsideMargins(float min, float max)
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{
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m_Scale.y = -(drawRect.height - topmargin - bottommargin) / (max - min);
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m_Translation.y = drawRect.height - min * m_Scale.y - topmargin;
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EnforceScaleAndRange();
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}
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public void SetShownVRange(float min, float max)
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{
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m_Scale.y = -drawRect.height / (max - min);
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m_Translation.y = drawRect.height - min * m_Scale.y;
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EnforceScaleAndRange();
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}
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// ShownArea is in curve space
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public Rect shownArea
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{
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set
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{
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m_Scale.x = drawRect.width / value.width;
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m_Scale.y = -drawRect.height / value.height;
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m_Translation.x = -value.x * m_Scale.x;
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m_Translation.y = drawRect.height - value.y * m_Scale.y;
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EnforceScaleAndRange();
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}
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get
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{
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return new Rect(
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-m_Translation.x / m_Scale.x,
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-(m_Translation.y - drawRect.height) / m_Scale.y,
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drawRect.width / m_Scale.x,
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drawRect.height / -m_Scale.y
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);
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}
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}
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public Rect shownAreaInsideMargins
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{
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set
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{
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shownAreaInsideMarginsInternal = value;
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EnforceScaleAndRange();
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}
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get
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{
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return shownAreaInsideMarginsInternal;
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}
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}
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private Rect shownAreaInsideMarginsInternal
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{
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set
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{
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m_Scale.x = (drawRect.width - leftmargin - rightmargin) / value.width;
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m_Scale.y = -(drawRect.height - topmargin - bottommargin) / value.height;
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m_Translation.x = -value.x * m_Scale.x + leftmargin;
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m_Translation.y = drawRect.height - value.y * m_Scale.y - topmargin;
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}
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get
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{
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float leftmarginRel = leftmargin / m_Scale.x;
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float rightmarginRel = rightmargin / m_Scale.x;
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float topmarginRel = topmargin / m_Scale.y;
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float bottommarginRel = bottommargin / m_Scale.y;
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Rect area = shownArea;
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area.x += leftmarginRel;
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area.y -= topmarginRel;
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area.width -= leftmarginRel + rightmarginRel;
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area.height += topmarginRel + bottommarginRel;
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return area;
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}
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}
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public virtual Bounds drawingBounds
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{
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get
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{
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return new Bounds(
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new Vector3((hBaseRangeMin + hBaseRangeMax) * 0.5f, (vBaseRangeMin + vBaseRangeMax) * 0.5f, 0),
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new Vector3(hBaseRangeMax - hBaseRangeMin, vBaseRangeMax - vBaseRangeMin, 1)
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);
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}
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}
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// Utility transform functions
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public Matrix4x4 drawingToViewMatrix
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{
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get
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{
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return Matrix4x4.TRS(m_Translation, Quaternion.identity, new Vector3(m_Scale.x, m_Scale.y, 1));
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}
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}
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public Vector2 DrawingToViewTransformPoint(Vector2 lhs)
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{ return new Vector2(lhs.x * m_Scale.x + m_Translation.x, lhs.y * m_Scale.y + m_Translation.y); }
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public Vector3 DrawingToViewTransformPoint(Vector3 lhs)
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{ return new Vector3(lhs.x * m_Scale.x + m_Translation.x, lhs.y * m_Scale.y + m_Translation.y, 0); }
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public Vector2 ViewToDrawingTransformPoint(Vector2 lhs)
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{ return new Vector2((lhs.x - m_Translation.x) / m_Scale.x, (lhs.y - m_Translation.y) / m_Scale.y); }
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public Vector3 ViewToDrawingTransformPoint(Vector3 lhs)
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{ return new Vector3((lhs.x - m_Translation.x) / m_Scale.x, (lhs.y - m_Translation.y) / m_Scale.y, 0); }
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public Vector2 DrawingToViewTransformVector(Vector2 lhs)
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{ return new Vector2(lhs.x * m_Scale.x, lhs.y * m_Scale.y); }
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public Vector3 DrawingToViewTransformVector(Vector3 lhs)
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{ return new Vector3(lhs.x * m_Scale.x, lhs.y * m_Scale.y, 0); }
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public Vector2 ViewToDrawingTransformVector(Vector2 lhs)
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{ return new Vector2(lhs.x / m_Scale.x, lhs.y / m_Scale.y); }
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public Vector3 ViewToDrawingTransformVector(Vector3 lhs)
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{ return new Vector3(lhs.x / m_Scale.x, lhs.y / m_Scale.y, 0); }
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public Vector2 mousePositionInDrawing
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{
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get { return ViewToDrawingTransformPoint(Event.current.mousePosition); }
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}
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public Vector2 NormalizeInViewSpace(Vector2 vec)
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{
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vec = Vector2.Scale(vec, m_Scale);
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vec /= vec.magnitude;
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return Vector2.Scale(vec, new Vector2(1 / m_Scale.x, 1 / m_Scale.y));
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}
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// Utility mouse event functions
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private bool IsZoomEvent()
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{
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return (
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(Event.current.button == 1 && Event.current.alt) // right+alt drag
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//|| (Event.current.button == 0 && Event.current.command) // left+commend drag
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//|| (Event.current.button == 2 && Event.current.command) // middle+command drag
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);
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}
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private bool IsPanEvent()
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{
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return (
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(Event.current.button == 0 && Event.current.alt) // left+alt drag
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|| (Event.current.button == 2 && !Event.current.command) // middle drag
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);
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}
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public ZoomArea()
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{
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m_MinimalGUI = false;
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}
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public ZoomArea(bool minimalGUI)
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{
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m_MinimalGUI = minimalGUI;
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}
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public void BeginViewGUI()
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{
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if (styles.horizontalScrollbar == null)
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styles.InitGUIStyles(m_MinimalGUI);
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GUILayout.BeginArea(m_DrawArea, styles.background);
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HandleZoomAndPanEvents(m_DrawArea);
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GUILayout.EndArea();
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}
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public void HandleZoomAndPanEvents(Rect area)
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{
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area.x = 0;
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area.y = 0;
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int id = GUIUtility.GetControlID(zoomableAreaHash, FocusType.Passive, area);
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switch (Event.current.GetTypeForControl(id))
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{
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case EventType.mouseDown:
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if (area.Contains(Event.current.mousePosition))
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{
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// Catch keyboard control when clicked inside zoomable area
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// (used to restrict scrollwheel)
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GUIUtility.keyboardControl = id;
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if (IsZoomEvent() || IsPanEvent())
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{
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GUIUtility.hotControl = id;
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m_MouseDownPosition = mousePositionInDrawing;
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Event.current.Use();
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}
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}
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break;
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case EventType.mouseUp:
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//Debug.Log("mouse-up!");
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if (GUIUtility.hotControl == id)
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{
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GUIUtility.hotControl = 0;
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// If we got the mousedown, the mouseup is ours as well
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// (no matter if the click was in the area or not)
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m_MouseDownPosition = new Vector2(-1000000, -1000000);
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//Event.current.Use();
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}
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break;
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case EventType.mouseDrag:
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if (GUIUtility.hotControl != id) break;
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if (IsZoomEvent())
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{
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// Zoom in around mouse down position
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Zoom(m_MouseDownPosition, false);
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Event.current.Use();
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}
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else if (IsPanEvent())
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{
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// Pan view
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Pan();
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Event.current.Use();
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}
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break;
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case EventType.scrollWheel:
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if (!area.Contains(Event.current.mousePosition))
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break;
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if (m_IgnoreScrollWheelUntilClicked && GUIUtility.keyboardControl != id)
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break;
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// Zoom in around cursor position
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Zoom(mousePositionInDrawing, true);
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Event.current.Use();
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break;
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}
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}
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public void EndViewGUI()
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{
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}
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private void Pan()
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{
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if (!m_HRangeLocked)
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m_Translation.x += Event.current.delta.x;
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if (!m_VRangeLocked)
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m_Translation.y += Event.current.delta.y;
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EnforceScaleAndRange();
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}
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private void Zoom(Vector2 zoomAround, bool scrollwhell)
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{
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// Get delta (from scroll wheel or mouse pad)
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// Add x and y delta to cover all cases
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// (scrool view has only y or only x when shift is pressed,
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// while mouse pad has both x and y at all times)
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float delta = Event.current.delta.x + Event.current.delta.y;
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if (scrollwhell)
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delta = -delta;
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// Scale multiplier. Don't allow scale of zero or below!
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float scale = Mathf.Max(0.01F, 1 + delta * 0.01F);
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if (!m_HRangeLocked && !Event.current.shift)
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{
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// Offset to make zoom centered around cursor position
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m_Translation.x -= zoomAround.x * (scale - 1) * m_Scale.x;
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// Apply zooming
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m_Scale.x *= scale;
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}
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if (!m_VRangeLocked && !EditorGUI.actionKey)
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{
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// Offset to make zoom centered around cursor position
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m_Translation.y -= zoomAround.y * (scale - 1) * m_Scale.y;
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// Apply zooming
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m_Scale.y *= scale;
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}
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EnforceScaleAndRange();
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}
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public void EnforceScaleAndRange()
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{
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float hScaleMin = m_HScaleMin;
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float vScaleMin = m_VScaleMin;
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float hScaleMax = m_HScaleMax;
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float vScaleMax = m_VScaleMax;
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if (hRangeMax != Mathf.Infinity && hRangeMin != Mathf.NegativeInfinity)
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hScaleMax = Mathf.Min(m_HScaleMax, hRangeMax - hRangeMin);
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if (vRangeMax != Mathf.Infinity && vRangeMin != Mathf.NegativeInfinity)
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vScaleMax = Mathf.Min(m_VScaleMax, vRangeMax - vRangeMin);
|
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Rect oldArea = m_LastShownAreaInsideMargins;
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Rect newArea = shownAreaInsideMargins;
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if (newArea == oldArea)
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return;
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float epsilon = 0.00001f;
|
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if (newArea.width < oldArea.width - epsilon)
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{
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float xLerp = Mathf.InverseLerp(oldArea.width, newArea.width, hScaleMin);
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newArea = new Rect(
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Mathf.Lerp(oldArea.x, newArea.x, xLerp),
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newArea.y,
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Mathf.Lerp(oldArea.width, newArea.width, xLerp),
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newArea.height
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);
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}
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if (newArea.height < oldArea.height - epsilon)
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{
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float yLerp = Mathf.InverseLerp(oldArea.height, newArea.height, vScaleMin);
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newArea = new Rect(
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newArea.x,
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Mathf.Lerp(oldArea.y, newArea.y, yLerp),
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newArea.width,
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Mathf.Lerp(oldArea.height, newArea.height, yLerp)
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);
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}
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if (newArea.width > oldArea.width + epsilon)
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{
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float xLerp = Mathf.InverseLerp(oldArea.width, newArea.width, hScaleMax);
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newArea = new Rect(
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Mathf.Lerp(oldArea.x, newArea.x, xLerp),
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newArea.y,
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Mathf.Lerp(oldArea.width, newArea.width, xLerp),
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newArea.height
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);
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}
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if (newArea.height > oldArea.height + epsilon)
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{
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float yLerp = Mathf.InverseLerp(oldArea.height, newArea.height, vScaleMax);
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newArea = new Rect(
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newArea.x,
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Mathf.Lerp(oldArea.y, newArea.y, yLerp),
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newArea.width,
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Mathf.Lerp(oldArea.height, newArea.height, yLerp)
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);
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}
|
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// Enforce ranges
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if (newArea.xMin < hRangeMin)
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newArea.x = hRangeMin;
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if (newArea.xMax > hRangeMax)
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newArea.x = hRangeMax - newArea.width;
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if (newArea.yMin < vRangeMin)
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newArea.y = vRangeMin;
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if (newArea.yMax > vRangeMax)
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newArea.y = vRangeMax - newArea.height;
|
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shownAreaInsideMarginsInternal = newArea;
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m_LastShownAreaInsideMargins = newArea;
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}
|
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public float PixelToTime(float pixelX, Rect rect)
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{
|
return ((pixelX - rect.x) * shownArea.width / rect.width + shownArea.x);
|
}
|
|
public float TimeToPixel(float time, Rect rect)
|
{
|
return (time - shownArea.x) / shownArea.width * rect.width + rect.x;
|
}
|
|
public float PixelDeltaToTime(Rect rect)
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{
|
return shownArea.width / rect.width;
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}
|
}
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