1 files changed, 167 insertions, 0 deletions
diff --git a/AlienSurvival/Assets/Tools/EditorGUIHelper/Editor/EditorHandlesHelper.cs b/AlienSurvival/Assets/Tools/EditorGUIHelper/Editor/EditorHandlesHelper.cs
new file mode 100644
index 0000000..0585894
--- /dev/null
+++ b/AlienSurvival/Assets/Tools/EditorGUIHelper/Editor/EditorHandlesHelper.cs
@@ -0,0 +1,167 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEditor;
+
+// https://docs.unity3d.com/ScriptReference/Handles.html
+
+// Scene视图中的自定义handles
+public static class EditorHandlesHelper
+{
+    static int s_ValueScaleHandleHash;
+
+    // limit value 数据
+    static float s_StartScale;
+    static float s_ValueDrag;
+    static float s_ScaleDrawLength;
+
+    // style 
+    static GUIStyle s_StyleBlackLabel;
+    static GUIStyle s_StyleWhiteLabel;
+    static Dictionary<int/*color*/, GUIStyle> s_StyleLabels;
+
+    static EditorHandlesHelper()
+    {
+        s_ValueScaleHandleHash = "ValueScaleHandleHash".GetHashCode();
+
+        SetupStyles();
+    }
+
+    static void SetupStyles()
+    {
+        s_StyleBlackLabel = new GUIStyle();
+        s_StyleBlackLabel.normal.textColor = Color.black;
+        s_StyleWhiteLabel = new GUIStyle();
+        s_StyleWhiteLabel.normal.textColor = Color.white;
+        s_StyleLabels = new Dictionary<int, GUIStyle>();
+    }
+
+    #region 单一handle
+
+    // 箭头
+    public static void Arrow(Vector3 position, Vector3 direction, float length = 1f, float arrowSize = 0.1f, bool dotted = false)
+    {
+        direction = direction.normalized;
+        if(!dotted)
+            Handles.DrawLine(position, position + direction * length);
+        else
+            Handles.DrawDottedLine(position, position + direction * length,1f);
+        Handles.ConeHandleCap(0, position + direction * length, Quaternion.LookRotation(direction, Vector3.up), arrowSize, EventType.Repaint);
+    }
+
+    // 控制数值的箭头
+    public static float ScaleValue(float value, Vector3 position, Vector3 direction, float length, Handles.CapFunction capFunc, Quaternion capRot, float size, float snap = 0)
+    {
+        Handles.DrawLine(position, position + direction * length);
+        value = ScaleValue(value, position + direction, capRot, size, capFunc, snap);
+        return value;
+    }
+
+    // 控制数值的handle
+    public static float ScaleValue(float value, Vector3 position, Quaternion rotation, float size, Handles.CapFunction capFunc, float snap)
+    {
+        int controlID = GUIUtility.GetControlID(s_ValueScaleHandleHash, FocusType.Keyboard);
+        int id = controlID;
+        Event current = Event.current;
+        switch (current.GetTypeForControl(id))
+        {
+            case EventType.MouseDown:
+                if ((HandleUtility.nearestControl == id && current.button == 0) || (GUIUtility.keyboardControl == id && current.button == 2))
+                {
+                    GUIUtility.keyboardControl = id;
+                    GUIUtility.hotControl = id;
+                    s_StartScale = value;
+                    s_ValueDrag = 0f;
+                    current.Use();
+                    EditorGUIUtility.SetWantsMouseJumping(1);
+                }
+                break;
+            case EventType.MouseUp:
+                if (GUIUtility.hotControl == id && (current.button == 0 || current.button == 2))
+                {
+                    GUIUtility.hotControl = 0;
+                    s_ScaleDrawLength = 1f;
+                    current.Use();
+                    EditorGUIUtility.SetWantsMouseJumping(0);
+                }
+                break;
+            case EventType.MouseDrag:
+                if (GUIUtility.hotControl == id)
+                {
+                    s_ValueDrag += HandleUtility.niceMouseDelta * 0.01f;
+                    value = (Handles.SnapValue(s_ValueDrag, snap) + 1f) * s_StartScale;
+                    s_ScaleDrawLength = value / s_StartScale;
+                    GUI.changed = true;
+                    current.Use();
+                }
+                break;
+            case EventType.KeyDown:
+                if (GUIUtility.hotControl == id && current.keyCode == KeyCode.Escape)
+                {
+                    value = s_StartScale;
+                    s_ScaleDrawLength = 1f;
+                    GUIUtility.hotControl = 0;
+                    GUI.changed = true;
+                    current.Use();
+                }
+                break;
+            case EventType.Repaint:
+                {
+                    Color color = Color.white;
+                    if (id == GUIUtility.keyboardControl)
+                    {
+                        color = Handles.color;
+                        Handles.color = Handles.selectedColor;
+                    }
+                    capFunc(id, position, rotation, size * 0.15f, EventType.Repaint);
+                    if (id == GUIUtility.keyboardControl)
+                    {
+                        Handles.color = color;
+                    }
+                    break;
+                }
+            case EventType.Layout:
+                HandleUtility.AddControl(id, HandleUtility.DistanceToCircle(position, size * 0.15f));
+                break;
+        }
+        return value;
+    }
+
+    // 带背景的label
+    public static void Label(Vector3 position, string label, Color textColor)
+    {
+        GUIStyle textStyle = TryGetLabelStyleOrCreate(textColor);
+        Handles.Label(position, label, textStyle);
+    }
+
+    public static void WireCube(Vector3 position, Vector3 size, Color col)
+    {
+        Color c = Handles.color;
+        Handles.color = col;
+        Handles.DrawWireCube(position, size);
+        Handles.color = c;
+    }
+
+    #endregion
+
+    #region 复合handle
+
+    #endregion
+
+    #region 内部方法
+
+    static GUIStyle TryGetLabelStyleOrCreate(Color color)
+    {
+        GUIStyle style;
+        if (!s_StyleLabels.TryGetValue(color.GetHashCode(), out style))
+        {
+            style = new GUIStyle();
+            style.normal.textColor = color;
+            s_StyleLabels.Add(color.GetHashCode(), style);
+        }
+        return style;
+    }
+
+    #endregion 
+
+}