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using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEditor;
// 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;
static EditorHandlesHelper()
{
s_ValueScaleHandleHash = "ValueScaleHandleHash".GetHashCode();
}
#region 单一handle
// 控制数值的handle
public static float ScaleValueHandle(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;
}
#endregion
#region 复合handle
#endregion
}
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