matplotlib · timhoffm · Jan 26, 2022 · Dec 17, 2021 · QuLogic · Jan 19, 2022
diff --git a/lib/matplotlib/backend_bases.py b/lib/matplotlib/backend_bases.py
@@ -2717,6 +2717,9 @@ class FigureManagerBase:
                 figure.canvas.manager.button_press_handler_id)
     """
 
+    _toolbar2_class = None
+    _toolmanager_toolbar_class = None
+
     def __init__(self, canvas, num):
         self.canvas = canvas
         canvas.manager = self  # store a pointer to parent
@@ -2734,7 +2737,19 @@ def __init__(self, canvas, num):
         self.toolmanager = (ToolManager(canvas.figure)
                             if mpl.rcParams['toolbar'] == 'toolmanager'
                             else None)
-        self.toolbar = None
+        if (mpl.rcParams["toolbar"] == "toolbar2"
+                and self._toolbar2_class):
+            self.toolbar = self._toolbar2_class(self.canvas)
+        elif (mpl.rcParams["toolbar"] == "toolmanager"
+                and self._toolmanager_toolbar_class):
+            self.toolbar = self._toolmanager_toolbar_class(self.toolmanager)
+        else:
+            self.toolbar = None
+
+        if self.toolmanager:
+            tools.add_tools_to_manager(self.toolmanager)
+            if self.toolbar:
+                tools.add_tools_to_container(self.toolbar)
 
         @self.canvas.figure.add_axobserver
         def notify_axes_change(fig):

diff --git a/lib/matplotlib/backends/_backend_tk.py b/lib/matplotlib/backends/_backend_tk.py
@@ -410,14 +410,8 @@ def __init__(self, canvas, num, window):
         self.window.withdraw()
         # packing toolbar first, because if space is getting low, last packed
         # widget is getting shrunk first (-> the canvas)
-        self.toolbar = self._get_toolbar()
         self.canvas._tkcanvas.pack(side=tk.TOP, fill=tk.BOTH, expand=1)
 
-        if self.toolmanager:
-            backend_tools.add_tools_to_manager(self.toolmanager)
-            if self.toolbar:
-                backend_tools.add_tools_to_container(self.toolbar)
-
         # If the window has per-monitor DPI awareness, then setup a Tk variable
         # to store the DPI, which will be updated by the C code, and the trace
         # will handle it on the Python side.
@@ -430,15 +424,6 @@ def __init__(self, canvas, num, window):
 
         self._shown = False
 
-    def _get_toolbar(self):
-        if mpl.rcParams['toolbar'] == 'toolbar2':
-            toolbar = NavigationToolbar2Tk(self.canvas)
-        elif mpl.rcParams['toolbar'] == 'toolmanager':
-            toolbar = ToolbarTk(self.toolmanager)
-        else:
-            toolbar = None
-        return toolbar
-
     def _update_window_dpi(self, *args):
         newdpi = self._window_dpi.get()
         self.window.call('tk', 'scaling', newdpi / 72)
@@ -898,6 +883,8 @@ def trigger(self, *args):
 
 
 Toolbar = ToolbarTk
+FigureManagerTk._toolbar2_class = NavigationToolbar2Tk
+FigureManagerTk._toolmanager_toolbar_class = ToolbarTk
 
 
 @_Backend.export

diff --git a/lib/matplotlib/backends/backend_gtk3.py b/lib/matplotlib/backends/backend_gtk3.py
@@ -331,13 +331,6 @@ def __init__(self, canvas, num):
         # calculate size for window
         w, h = self.canvas.get_width_height()
 
-        self.toolbar = self._get_toolbar()
-
-        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 is not None:
             self.toolbar.show()
             self.vbox.pack_end(self.toolbar, False, False, 0)
@@ -737,6 +730,8 @@ def error_msg_gtk(msg, parent=None):
     FigureCanvasGTK3, _backend_gtk.ConfigureSubplotsGTK)
 backend_tools._register_tool_class(
     FigureCanvasGTK3, _backend_gtk.RubberbandGTK)
+FigureManagerGTK3._toolbar2_class = NavigationToolbar2GTK3
+FigureManagerGTK3._toolmanager_toolbar_class = ToolbarGTK3
 
 
 @_BackendGTK.export

diff --git a/lib/matplotlib/backends/backend_gtk4.py b/lib/matplotlib/backends/backend_gtk4.py
@@ -279,13 +279,6 @@ def __init__(self, canvas, num):
         # calculate size for window
         w, h = self.canvas.get_width_height()
 
-        self.toolbar = self._get_toolbar()
-
-        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 is not None:
             sw = Gtk.ScrolledWindow(vscrollbar_policy=Gtk.PolicyType.NEVER)
             sw.set_child(self.toolbar)
@@ -335,17 +328,6 @@ def full_screen_toggle(self):
         else:
             self.window.unfullscreen()
 
-    def _get_toolbar(self):
-        # must be inited after the window, drawingArea and figure
-        # attrs are set
-        if mpl.rcParams['toolbar'] == 'toolbar2':
-            toolbar = NavigationToolbar2GTK4(self.canvas)
-        elif mpl.rcParams['toolbar'] == 'toolmanager':
-            toolbar = ToolbarGTK4(self.toolmanager)
-        else:
-            toolbar = None
-        return toolbar
-
     def get_window_title(self):
         return self.window.get_title()
 
@@ -673,6 +655,8 @@ def trigger(self, *args, **kwargs):
 backend_tools._register_tool_class(
     FigureCanvasGTK4, _backend_gtk.RubberbandGTK)
 Toolbar = ToolbarGTK4
+FigureManagerGTK4._toolbar2_class = NavigationToolbar2GTK4
+FigureManagerGTK4._toolmanager_toolbar_class = ToolbarGTK4
 
 
 @_BackendGTK.export

diff --git a/lib/matplotlib/backends/backend_macosx.py b/lib/matplotlib/backends/backend_macosx.py
@@ -62,30 +62,6 @@ def resize(self, width, height):
         self.draw_idle()
 
 
-class FigureManagerMac(_macosx.FigureManager, FigureManagerBase):
-    """
-    Wrap everything up into a window for the pylab interface
-    """
-    def __init__(self, canvas, num):
-        _macosx.FigureManager.__init__(self, canvas)
-        icon_path = str(cbook._get_data_path('images/matplotlib.pdf'))
-        _macosx.FigureManager.set_icon(icon_path)
-        FigureManagerBase.__init__(self, canvas, num)
-        if mpl.rcParams['toolbar'] == 'toolbar2':
-            self.toolbar = NavigationToolbar2Mac(canvas)
-        else:
-            self.toolbar = None
-        if self.toolbar is not None:
-            self.toolbar.update()
-
-        if mpl.is_interactive():
-            self.show()
-            self.canvas.draw_idle()
-
-    def close(self):
-        Gcf.destroy(self)
-
-
 class NavigationToolbar2Mac(_macosx.NavigationToolbar2, NavigationToolbar2):
 
     def __init__(self, canvas):
@@ -123,6 +99,24 @@ def set_message(self, message):
         _macosx.NavigationToolbar2.set_message(self, message.encode('utf-8'))
 
 
+class FigureManagerMac(_macosx.FigureManager, FigureManagerBase):
+    _toolbar2_class = NavigationToolbar2Mac
+
+    def __init__(self, canvas, num):
+        _macosx.FigureManager.__init__(self, canvas)
+        icon_path = str(cbook._get_data_path('images/matplotlib.pdf'))
+        _macosx.FigureManager.set_icon(icon_path)
+        FigureManagerBase.__init__(self, canvas, num)
+        if self.toolbar is not None:
+            self.toolbar.update()
+        if mpl.is_interactive():
+            self.show()
+            self.canvas.draw_idle()
+
+    def close(self):
+        Gcf.destroy(self)
+
+
 @_Backend.export
 class _BackendMac(_Backend):
     FigureCanvas = FigureCanvasMac

diff --git a/lib/matplotlib/backends/backend_nbagg.py b/lib/matplotlib/backends/backend_nbagg.py
@@ -72,7 +72,7 @@ class NavigationIPy(NavigationToolbar2WebAgg):
 
 
 class FigureManagerNbAgg(FigureManagerWebAgg):
-    ToolbarCls = NavigationIPy
+    _toolbar2_class = ToolbarCls = NavigationIPy
 
     def __init__(self, canvas, num):
         self._shown = False

diff --git a/lib/matplotlib/backends/backend_qt.py b/lib/matplotlib/backends/backend_qt.py
@@ -529,13 +529,6 @@ def __init__(self, canvas, num):
 
         self.window._destroying = False
 
-        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()
@@ -582,17 +575,6 @@ def _widgetclosed(self):
             # Gcf can get destroyed before the Gcf.destroy
             # line is run, leading to a useless AttributeError.
 
-    def _get_toolbar(self, canvas, parent):
-        # must be inited after the window, drawingArea and figure
-        # attrs are set
-        if mpl.rcParams['toolbar'] == 'toolbar2':
-            toolbar = NavigationToolbar2QT(canvas)
-        elif mpl.rcParams['toolbar'] == 'toolmanager':
-            toolbar = ToolbarQt(self.toolmanager)
-        else:
-            toolbar = None
-        return toolbar
-
     def resize(self, width, height):
         # The Qt methods return sizes in 'virtual' pixels so we do need to
         # rescale from physical to logical pixels.
@@ -1021,6 +1003,10 @@ def trigger(self, *args, **kwargs):
         qApp.clipboard().setPixmap(pixmap)
 
 
+FigureManagerQT._toolbar2_class = NavigationToolbar2QT
+FigureManagerQT._toolmanager_toolbar_class = ToolbarQt
+
+
 @_Backend.export
 class _BackendQT(_Backend):
     FigureCanvas = FigureCanvasQT

diff --git a/lib/matplotlib/backends/backend_webagg_core.py b/lib/matplotlib/backends/backend_webagg_core.py
@@ -453,20 +453,15 @@ def set_history_buttons(self):
 
 
 class FigureManagerWebAgg(backend_bases.FigureManagerBase):
-    ToolbarCls = NavigationToolbar2WebAgg
+    _toolbar2_class = ToolbarCls = NavigationToolbar2WebAgg
 
     def __init__(self, canvas, num):
         self.web_sockets = set()
         super().__init__(canvas, num)
-        self.toolbar = self._get_toolbar(canvas)
 
     def show(self):
         pass
 
-    def _get_toolbar(self, canvas):
-        toolbar = self.ToolbarCls(canvas)
-        return toolbar
-
     def resize(self, w, h, forward=True):
         self._send_event(
             'resize',

diff --git a/lib/matplotlib/backends/backend_wx.py b/lib/matplotlib/backends/backend_wx.py
@@ -901,13 +901,9 @@ def __init__(self, num, fig, *, canvas_class=None):
 
         self.figmgr = FigureManagerWx(self.canvas, num, self)
 
-        self.toolbar = self._get_toolbar()
-        if self.figmgr.toolmanager:
-            backend_tools.add_tools_to_manager(self.figmgr.toolmanager)
-            if self.toolbar:
-                backend_tools.add_tools_to_container(self.toolbar)
-        if self.toolbar is not None:
-            self.SetToolBar(self.toolbar)
+        toolbar = self.canvas.manager.toolbar
-        toolbar = self.canvas.manager.toolbar
+        toolbar = self.figmgr.toolbar
-        toolbar = self.canvas.manager.toolbar
+        toolbar = self.figmgr.toolbar
+        if toolbar is not None:
+            self.SetToolBar(toolbar)
 
         # On Windows, canvas sizing must occur after toolbar addition;
         # otherwise the toolbar further resizes the canvas.
@@ -920,18 +916,8 @@ def __init__(self, num, fig, *, canvas_class=None):
 
         self.Bind(wx.EVT_CLOSE, self._on_close)
 
-    @property
-    def toolmanager(self):
-        return self.figmgr.toolmanager
-
-    def _get_toolbar(self):
-        if mpl.rcParams['toolbar'] == 'toolbar2':
-            toolbar = NavigationToolbar2Wx(self.canvas)
-        elif mpl.rcParams['toolbar'] == 'toolmanager':
-            toolbar = ToolbarWx(self.toolmanager)
-        else:
-            toolbar = None
-        return toolbar
+    toolmanager = property(lambda self: self.figmgr.toolmanager)
+    toolbar = property(lambda self: self.GetToolBar())  # backcompat
 
     @_api.deprecated(
         "3.6", alternative="the canvas_class constructor parameter")
@@ -956,7 +942,7 @@ def _on_close(self, event):
 
     def Destroy(self, *args, **kwargs):
         try:
-            self.canvas.mpl_disconnect(self.toolbar._id_drag)
+            self.canvas.mpl_disconnect(self.canvas.manager.toolbar._id_drag)
             # Rationale for line above: see issue 2941338.
         except AttributeError:
             pass  # classic toolbar lacks the attribute
@@ -965,8 +951,8 @@ def Destroy(self, *args, **kwargs):
         # MPLBACKEND=wxagg python -c 'from pylab import *; plot()'.
         if self and not self.IsBeingDeleted():
             super().Destroy(*args, **kwargs)
-            # self.toolbar.Destroy() should not be necessary if the close event
-            # is allowed to propagate.
+            # toolbar.Destroy() should not be necessary if the close event is
+            # allowed to propagate.
         return True
 
 
@@ -988,20 +974,7 @@ class FigureManagerWx(FigureManagerBase):
     def __init__(self, canvas, num, frame):
         _log.debug("%s - __init__()", type(self))
         self.frame = self.window = frame
-        self._initializing = True
         super().__init__(canvas, num)
-        self._initializing = False
-
-    @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 not self._initializing:
-            raise AttributeError("can't set attribute")
 
     def show(self):
         # docstring inherited
@@ -1373,6 +1346,10 @@ def trigger(self, *args, **kwargs):
             wx.TheClipboard.Close()
 
 
+FigureManagerWx._toolbar2_class = NavigationToolbar2Wx
+FigureManagerWx._toolmanager_toolbar_class = ToolbarWx
+
+
 @_Backend.export
 class _BackendWx(_Backend):
     FigureCanvas = FigureCanvasWx

diff --git a/lib/matplotlib/tests/test_backend_bases.py b/lib/matplotlib/tests/test_backend_bases.py
@@ -4,8 +4,6 @@
 from matplotlib.backend_bases import (
     FigureCanvasBase, LocationEvent, MouseButton, MouseEvent,
     NavigationToolbar2, RendererBase)
-from matplotlib.backend_tools import (ToolZoom, ToolPan, RubberbandBase,
-                                      ToolViewsPositions, _views_positions)
 from matplotlib.figure import Figure
 import matplotlib.pyplot as plt
 import matplotlib.transforms as transforms
@@ -250,14 +248,6 @@ def test_toolbar_zoompan():
         plt.rcParams['toolbar'] = 'toolmanager'
     ax = plt.gca()
     assert ax.get_navigate_mode() is None
-    ax.figure.canvas.manager.toolmanager.add_tool(name="zoom",
-                                                  tool=ToolZoom)
-    ax.figure.canvas.manager.toolmanager.add_tool(name="pan",
-                                                  tool=ToolPan)
-    ax.figure.canvas.manager.toolmanager.add_tool(name=_views_positions,
-                                                  tool=ToolViewsPositions)
-    ax.figure.canvas.manager.toolmanager.add_tool(name='rubberband',
-                                                  tool=RubberbandBase)
     ax.figure.canvas.manager.toolmanager.trigger_tool('zoom')
     assert ax.get_navigate_mode() == "ZOOM"
     ax.figure.canvas.manager.toolmanager.trigger_tool('pan')