private void UpdateLayoutRect(Rect rect)
{
_rect_header = VxlGUI.GetAboveElement(rect, 0, VxlGUI.MED_BAR);
Rect rect_body = VxlGUI.GetSandwichedRectY(rect, VxlGUI.MED_BAR + VxlGUI.SM_SPACE, 0);
float listheight = Mathf.Max(0, (rect_body.height - VxlGUI.MED_BAR - VxlGUI.SM_SPACE - VxlGUI.SM_SPACE) / 2f);
_rect_guidscroll = VxlGUI.GetAboveElement(rect_body, 0, listheight);
_rect_guidcontent = VxlGUI.GetScrollViewRect(_guidlist, _rect_guidscroll.width, _rect_guidscroll.height);
_rect_panel = VxlGUI.GetMiddleY(rect_body, VxlGUI.MED_BAR);
_rect_libscroll = VxlGUI.GetBelowElement(rect_body, 0, listheight);
_rect_libcontent = VxlGUI.GetScrollViewRect(_libobjlist, _rect_libscroll.width, _rect_libscroll.height);
}