content: """
  Render to qt from agg
  """
  from __future__ import (absolute_import, division, print_function,
                          unicode_literals)
  
  import six
  
  import os  # not used
  import sys
  import ctypes
  import warnings
  
  import matplotlib
  from matplotlib.figure import Figure
  
  
  from .backend_qt5agg import FigureCanvasQTAggBase as _FigureCanvasQTAggBase
  
  from .backend_agg import FigureCanvasAgg
  from .backend_qt4 import QtCore
  from .backend_qt4 import FigureManagerQT
  from .backend_qt4 import FigureCanvasQT
  from .backend_qt4 import NavigationToolbar2QT
  ##### not used
  from .backend_qt4 import show
  from .backend_qt4 import draw_if_interactive
  from .backend_qt4 import backend_version
  ######
  
  DEBUG = False
  
  _decref = ctypes.pythonapi.Py_DecRef
  _decref.argtypes = [ctypes.py_object]
  _decref.restype = None
  
  
  def new_figure_manager(num, *args, **kwargs):
      """
      Create a new figure manager instance
      """
      if DEBUG:
          print('backend_qt4agg.new_figure_manager')
      FigureClass = kwargs.pop('FigureClass', Figure)
      thisFig = FigureClass(*args, **kwargs)
      return new_figure_manager_given_figure(num, thisFig)
  
  
  def new_figure_manager_given_figure(num, figure):
      """
      Create a new figure manager instance for the given figure.
      """
      canvas = FigureCanvasQTAgg(figure)
      return FigureManagerQT(canvas, num)
  
  
  class FigureCanvasQTAggBase(_FigureCanvasQTAggBase):
      def __init__(self, figure):
          self._agg_draw_pending = False
  
  
  class FigureCanvasQTAgg(FigureCanvasQTAggBase,
                          FigureCanvasQT, FigureCanvasAgg):
      """
      The canvas the figure renders into.  Calls the draw and print fig
      methods, creates the renderers, etc...
  
      Public attribute
  
        figure - A Figure instance
     """
  
      def __init__(self, figure):
          if DEBUG:
              print('FigureCanvasQtAgg: ', figure)
          FigureCanvasQT.__init__(self, figure)
          FigureCanvasQTAggBase.__init__(self, figure)
          FigureCanvasAgg.__init__(self, figure)
          self._drawRect = None
          self.blitbox = []
          self.setAttribute(QtCore.Qt.WA_OpaquePaintEvent)
  
  
  FigureCanvas = FigureCanvasQTAgg
  FigureManager = FigureManagerQT
  