matplotlib · tacaswell · Apr 15, 2020 · Apr 15, 2020 · Apr 15, 2020 · Apr 15, 2020
diff --git a/lib/matplotlib/backend_bases.py b/lib/matplotlib/backend_bases.py
@@ -46,6 +46,7 @@
     backend_tools as tools, cbook, colors, textpath, tight_bbox, transforms,
     widgets, get_backend, is_interactive, rcParams)
 from matplotlib._pylab_helpers import Gcf
+from matplotlib.backend_managers import ToolManager
 from matplotlib.transforms import Affine2D
 from matplotlib.path import Path
 
@@ -2590,7 +2591,9 @@ def __init__(self, canvas, num):
                 'button_press_event',
                 self.button_press)
 
-        self.toolmanager = None
+        self.toolmanager = (ToolManager(canvas.figure)
+                            if mpl.rcParams['toolbar'] == 'toolmanager'
+                            else None)
         self.toolbar = None
 
         @self.canvas.figure.add_axobserver

diff --git a/lib/matplotlib/backends/_backend_tk.py b/lib/matplotlib/backends/_backend_tk.py
@@ -15,7 +15,6 @@
 from matplotlib.backend_bases import (
     _Backend, FigureCanvasBase, FigureManagerBase, NavigationToolbar2,
     StatusbarBase, TimerBase, ToolContainerBase, cursors)
-from matplotlib.backend_managers import ToolManager
 from matplotlib._pylab_helpers import Gcf
 from matplotlib.figure import Figure
 from matplotlib.widgets import SubplotTool
@@ -405,17 +404,13 @@ class FigureManagerTk(FigureManagerBase):
         The tk.Toolbar
     window : tk.Window
         The tk.Window
-
     """
+
     def __init__(self, canvas, num, window):
         FigureManagerBase.__init__(self, canvas, num)
         self.window = window
         self.window.withdraw()
         self.set_window_title("Figure %d" % num)
-        self.canvas = canvas
-        # If using toolmanager it has to be present when initializing the
-        # toolbar
-        self.toolmanager = self._get_toolmanager()
         # packing toolbar first, because if space is getting low, last packed
         # widget is getting shrunk first (-> the canvas)
         self.toolbar = self._get_toolbar()
@@ -440,13 +435,6 @@ def _get_toolbar(self):
             toolbar = None
         return toolbar
 
-    def _get_toolmanager(self):
-        if mpl.rcParams['toolbar'] == 'toolmanager':
-            toolmanager = ToolManager(self.canvas.figure)
-        else:
-            toolmanager = None
-        return toolmanager
-
     def resize(self, width, height):
         self.canvas._tkcanvas.configure(width=width, height=height)
 
@@ -502,7 +490,6 @@ class NavigationToolbar2Tk(NavigationToolbar2, tk.Frame):
         ``pack_toolbar=False``.
     """
     def __init__(self, canvas, window, *, pack_toolbar=True):
-        self.canvas = canvas
         # Avoid using self.window (prefer self.canvas.get_tk_widget().master),
         # so that Tool implementations can reuse the methods.
         self.window = window

diff --git a/lib/matplotlib/backends/backend_gtk3.py b/lib/matplotlib/backends/backend_gtk3.py
@@ -10,7 +10,6 @@
 from matplotlib.backend_bases import (
     _Backend, FigureCanvasBase, FigureManagerBase, NavigationToolbar2,
     StatusbarBase, TimerBase, ToolContainerBase, cursors)
-from matplotlib.backend_managers import ToolManager
 from matplotlib.figure import Figure
 from matplotlib.widgets import SubplotTool
 
@@ -343,7 +342,6 @@ def __init__(self, canvas, num):
         w = int(self.canvas.figure.bbox.width)
         h = int(self.canvas.figure.bbox.height)
 
-        self.toolmanager = self._get_toolmanager()
         self.toolbar = self._get_toolbar()
         self.statusbar = None
 
@@ -420,14 +418,6 @@ def _get_toolbar(self):
             toolbar = None
         return toolbar
 
-    def _get_toolmanager(self):
-        # must be initialised after toolbar has been set
-        if mpl.rcParams['toolbar'] == 'toolmanager':
-            toolmanager = ToolManager(self.canvas.figure)
-        else:
-            toolmanager = None
-        return toolmanager
-
     def get_window_title(self):
         return self.window.get_title()
 

diff --git a/lib/matplotlib/backends/backend_qt5.py b/lib/matplotlib/backends/backend_qt5.py
@@ -15,7 +15,6 @@
     TimerBase, cursors, ToolContainerBase, StatusbarBase, MouseButton)
 import matplotlib.backends.qt_editor.figureoptions as figureoptions
 from matplotlib.backends.qt_editor.formsubplottool import UiSubplotTool
-from matplotlib.backend_managers import ToolManager
 from . import qt_compat
 from .qt_compat import (
     QtCore, QtGui, QtWidgets, _isdeleted, is_pyqt5, __version__, QT_API)
@@ -512,12 +511,10 @@ class FigureManagerQT(FigureManagerBase):
         The qt.QToolBar
     window : qt.QMainWindow
         The qt.QMainWindow
-
     """
 
     def __init__(self, canvas, num):
         FigureManagerBase.__init__(self, canvas, num)
-        self.canvas = canvas
         self.window = MainWindow()
         self.window.closing.connect(canvas.close_event)
         self.window.closing.connect(self._widgetclosed)
@@ -526,19 +523,15 @@ def __init__(self, canvas, num):
         image = str(cbook._get_data_path('images/matplotlib.svg'))
         self.window.setWindowIcon(QtGui.QIcon(image))
 
-        # Give the keyboard focus to the figure instead of the
-        # manager; StrongFocus accepts both tab and click to focus and
-        # will enable the canvas to process event w/o clicking.
-        # ClickFocus only takes the focus is the window has been
-        # clicked
-        # on. http://qt-project.org/doc/qt-4.8/qt.html#FocusPolicy-enum or
-        # http://doc.qt.digia.com/qt/qt.html#FocusPolicy-enum
+        # Give the keyboard focus to the figure instead of the manager:
+        # StrongFocus accepts both tab and click to focus and will enable the
+        # canvas to process event without clicking.
+        # https://doc.qt.io/qt-5/qt.html#FocusPolicy-enum
         self.canvas.setFocusPolicy(QtCore.Qt.StrongFocus)
         self.canvas.setFocus()
 
         self.window._destroying = False
 
-        self.toolmanager = self._get_toolmanager()
         self.toolbar = self._get_toolbar(self.canvas, self.window)
         self.statusbar = None
 
@@ -603,13 +596,6 @@ def _get_toolbar(self, canvas, parent):
             toolbar = None
         return toolbar
 
-    def _get_toolmanager(self):
-        if matplotlib.rcParams['toolbar'] == 'toolmanager':
-            toolmanager = ToolManager(self.canvas.figure)
-        else:
-            toolmanager = None
-        return toolmanager
-
     def resize(self, width, height):
         # these are Qt methods so they return sizes in 'virtual' pixels
         # so we do not need to worry about dpi scaling here.

diff --git a/lib/matplotlib/backends/backend_wx.py b/lib/matplotlib/backends/backend_wx.py
@@ -935,7 +935,8 @@ def __init__(self, num, fig):
         # By adding toolbar in sizer, we are able to put it at the bottom
         # of the frame - so appearance is closer to GTK version
 
-        self.toolmanager = self._get_toolmanager()
+        self.figmgr = FigureManagerWx(self.canvas, num, self)
+
         statusbar = (StatusbarWx(self, self.toolmanager)
                      if self.toolmanager else StatusBarWx(self))
         self.SetStatusBar(statusbar)
@@ -961,15 +962,17 @@ def __init__(self, num, fig):
 
         self.canvas.SetMinSize((2, 2))
 
-        self.figmgr = FigureManagerWx(self.canvas, num, self)
-
         self.Bind(wx.EVT_CLOSE, self._onClose)
 
     @cbook.deprecated("3.2", alternative="self.GetStatusBar()")
     @property
     def statusbar(self):
         return self.GetStatusBar()
 
+    @property
+    def toolmanager(self):
+        return self.figmgr.toolmanager
+
     def _get_toolbar(self):
         if mpl.rcParams['toolbar'] == 'toolbar2':
             toolbar = NavigationToolbar2Wx(self.canvas)
@@ -979,13 +982,6 @@ def _get_toolbar(self):
             toolbar = None
         return toolbar
 
-    def _get_toolmanager(self):
-        if mpl.rcParams['toolbar'] == 'toolmanager':
-            toolmanager = ToolManager(self.canvas.figure)
-        else:
-            toolmanager = None
-        return toolmanager
-
     def get_canvas(self, fig):
         return FigureCanvasWx(self, -1, fig)
 
@@ -1045,8 +1041,16 @@ def __init__(self, canvas, num, frame):
         self.frame = frame
         self.window = frame
 
-        self.toolmanager = getattr(frame, "toolmanager", None)
-        self.toolbar = frame.GetToolBar()
+    @property
+    def toolbar(self):
+        return self.frame.GetToolBar()
+
+    @toolbar.setter
+    def toolbar(self, value):
+        # Never allow this, except that base class inits this to None before
+        # the frame is set up.
+        if value is not None or hasattr(self, "frame"):
+            raise AttributeError("can't set attribute")
 
     def show(self):
         # docstring inherited
@@ -1110,7 +1114,6 @@ class NavigationToolbar2Wx(NavigationToolbar2, wx.ToolBar):
     def __init__(self, canvas):
         wx.ToolBar.__init__(self, canvas.GetParent(), -1)
         NavigationToolbar2.__init__(self, canvas)
-        self.canvas = canvas
         self._idle = True
         self.prevZoomRect = None
         # for now, use alternate zoom-rectangle drawing on all