//draw editor gui
public virtual void Draw(ActionObject aco)
{
GUILayout.BeginVertical();
float rateTime = mTime / aco.mTotalTime;
TimeLine(rateTime);
rateTime = GUILayout.HorizontalSlider(rateTime, 0, 1f, GUILayout.Width(window_size.x));
mTime = aco.mTotalTime * rateTime;
float parentTime = aco.GetParentEventTime(this);
if (parentTime > mTime)
{
mTime = parentTime;
}
GUILayout.EndVertical();
}