Manipulator.cs
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using UnityEngine;
namespace UnityEditor.Timeline
{
abstract class Manipulator
{
int m_Id;
protected virtual bool MouseDown(Event evt, WindowState state) { return false; }
protected virtual bool MouseDrag(Event evt, WindowState state) { return false; }
protected virtual bool MouseWheel(Event evt, WindowState state) { return false; }
protected virtual bool MouseUp(Event evt, WindowState state) { return false; }
protected virtual bool DoubleClick(Event evt, WindowState state) { return false; }
protected virtual bool KeyDown(Event evt, WindowState state) { return false; }
protected virtual bool KeyUp(Event evt, WindowState state) { return false; }
protected virtual bool ContextClick(Event evt, WindowState state) { return false; }
protected virtual bool ValidateCommand(Event evt, WindowState state) { return false; }
protected virtual bool ExecuteCommand(Event evt, WindowState state) { return false; }
public virtual void Overlay(Event evt, WindowState state) {}
public bool HandleEvent(WindowState state)
{
if (m_Id == 0)
m_Id = GUIUtility.GetPermanentControlID();
bool isHandled = false;
var evt = Event.current;
switch (evt.GetTypeForControl(m_Id))
{
case EventType.ScrollWheel:
isHandled = MouseWheel(evt, state);
break;
case EventType.MouseUp:
{
if (GUIUtility.hotControl == m_Id)
{
isHandled = MouseUp(evt, state);
GUIUtility.hotControl = 0;
evt.Use();
}
}
break;
case EventType.MouseDown:
{
isHandled = evt.clickCount < 2 ? MouseDown(evt, state) : DoubleClick(evt, state);
if (isHandled)
GUIUtility.hotControl = m_Id;
}
break;
case EventType.MouseDrag:
{
if (GUIUtility.hotControl == m_Id)
isHandled = MouseDrag(evt, state);
}
break;
case EventType.KeyDown:
isHandled = KeyDown(evt, state);
break;
case EventType.KeyUp:
isHandled = KeyUp(evt, state);
break;
case EventType.ContextClick:
isHandled = ContextClick(evt, state);
break;
case EventType.ValidateCommand:
isHandled = ValidateCommand(evt, state);
break;
case EventType.ExecuteCommand:
isHandled = ExecuteCommand(evt, state);
break;
}
if (isHandled)
evt.Use();
return isHandled;
}
}
}