default_tools = {'home': ToolHome, 'back': ToolBack, 'forward': ToolForward,
     'zoom': ToolZoom, 'pan': ToolPan,
     'subplots': 'ToolConfigureSubplots',
     'save': 'ToolSaveFigure',
     'grid': ToolGrid,
     'grid_minor': ToolMinorGrid,
     'fullscreen': ToolFullScreen,
     'quit': ToolQuit,
     'quit_all': ToolQuitAll,
     'allnav': _ToolEnableAllNavigation,
     'nav': _ToolEnableNavigation,
     'xscale': ToolXScale,
     'yscale': ToolYScale,
     'position': ToolCursorPosition,
     _views_positions: ToolViewsPositions,
     'cursor': 'ToolSetCursor',
     'rubberband': 'ToolRubberband',
     'help': 'ToolHelp',
     'copy': 'ToolCopyToClipboard',
     }

import matplotlib.pyplot as plt
import matplotlib as mpl
from pprint import pprint

plt.rcParams['toolbar'] = 'toolmanager'
fig = plt.gcf()
pprint(mpl.backend_tools.default_tools)

import matplotlib.pyplot as plt
import matplotlib as mpl

plt.rcParams['toolbar'] = 'toolmanager'
fig = plt.gcf()
# 通过mpl.backend_tools.add_tools_to_container函数添加工具项
mpl.backend_tools.add_tools_to_container(fig.canvas.manager.toolbar, tools=[['foo', [ 'fullscreen']]])
plt.show()

import matplotlib.pyplot as plt
import matplotlib as mpl

plt.rcParams['toolbar'] = 'toolmanager'
fig = plt.gcf()

fig.canvas.manager.toolmanager.remove_tool('forward')
fig.canvas.manager.toolbar.remove_toolitem('back')
fig.canvas.manager.toolbar.add_tool('quit', 'foo')
fig.canvas.manager.toolbar.add_toolitem('fullscreen', 'foo', -1,'fullscreen','fullscreen',False) 

plt.show()

class FigureManagerQT(FigureManagerBase):
 self.toolbar = self._get_toolbar(self.canvas, self.window)

 if self.toolmanager:
  backend_tools.add_tools_to_manager(self.toolmanager)
  if self.toolbar:
   backend_tools.add_tools_to_container(self.toolbar)

 if self.toolbar:
  self.window.addToolBar(self.toolbar)
  tbs_height = self.toolbar.sizeHint().height()
 else:
  tbs_height = 0

 def _get_toolbar(self, canvas, parent):
  # must be inited after the window, drawingArea and figure
  # attrs are set
  if matplotlib.rcParams['toolbar'] == 'toolbar2':
   toolbar = NavigationToolbar2QT(canvas, parent, True)
  elif matplotlib.rcParams['toolbar'] == 'toolmanager':
   toolbar = ToolbarQt(self.toolmanager, self.window)
  else:
   toolbar = None
  return toolbar

 class ToolbarQt(ToolContainerBase, QtWidgets.QToolBar):
 def __init__(self, toolmanager, parent):
  ToolContainerBase.__init__(self, toolmanager)
  QtWidgets.QToolBar.__init__(self, parent)
  self.setAllowedAreas(
   QtCore.Qt.TopToolBarArea | QtCore.Qt.BottomToolBarArea)
  message_label = QtWidgets.QLabel("")
  message_label.setAlignment(
   QtCore.Qt.AlignRight | QtCore.Qt.AlignVCenter)
  message_label.setSizePolicy(
   QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding,
         QtWidgets.QSizePolicy.Ignored))
  self._message_action = self.addWidget(message_label)
  self._toolitems = {}
  self._groups = {}

 def add_toolitem(
   self, name, group, position, image_file, description, toggle):

  button = QtWidgets.QToolButton(self)
  if image_file:
   button.setIcon(NavigationToolbar2QT._icon(self, image_file))
  button.setText(name)
  if description:
   button.setToolTip(description)

  def handler():
   self.trigger_tool(name)
  if toggle:
   button.setCheckable(True)
   button.toggled.connect(handler)
  else:
   button.clicked.connect(handler)

  self._toolitems.setdefault(name, [])
  self._add_to_group(group, name, button, position)
  self._toolitems[name].append((button, handler))

 def _add_to_group(self, group, name, button, position):
  gr = self._groups.get(group, [])
  if not gr:
   sep = self.insertSeparator(self._message_action)
   gr.append(sep)
  before = gr[position]
  widget = self.insertWidget(before, button)
  gr.insert(position, widget)
  self._groups[group] = gr

 def toggle_toolitem(self, name, toggled):
  if name not in self._toolitems:
   return
  for button, handler in self._toolitems[name]:
   button.toggled.disconnect(handler)
   button.setChecked(toggled)
   button.toggled.connect(handler)

 def remove_toolitem(self, name):
  for button, handler in self._toolitems[name]:
   button.setParent(None)
  del self._toolitems[name]

 def set_message(self, s):
  self.widgetForAction(self._message_action).setText(s

def add_tools_to_container(container, tools=default_toolbar_tools):
 """
 Add multiple tools to the container.

 Parameters
 ----------
 container : Container
  `backend_bases.ToolContainerBase` object that will get the tools added.
 tools : list, optional
  List in the form ``[[group1, [tool1, tool2 ...]], [group2, [...]]]``
  where the tools ``[tool1, tool2, ...]`` will display in group1.
  See `add_tool` for details.
 """

 for group, grouptools in tools:
  for position, tool in enumerate(grouptools):
   container.add_tool(tool, group, position)

def add_tools_to_manager(toolmanager, tools=default_tools):
 """
 Add multiple tools to a `.ToolManager`.

 Parameters
 ----------
 toolmanager : `.backend_managers.ToolManager`
  Manager to which the tools are added.
 tools : {str: class_like}, optional
  The tools to add in a {name: tool} dict, see `add_tool` for more
  info.
 """

 for name, tool in tools.items():
  toolmanager.add_tool(name, tool)