1053 lines
41 KiB
Python
1053 lines
41 KiB
Python
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import uuid
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import weakref
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from contextlib import contextmanager
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import logging
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import math
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import os.path
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import pathlib
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import sys
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import tkinter as tk
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import tkinter.filedialog
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import tkinter.font
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import tkinter.messagebox
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from tkinter.simpledialog import SimpleDialog
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import numpy as np
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from PIL import Image, ImageTk
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import matplotlib as mpl
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from matplotlib import _api, backend_tools, cbook, _c_internal_utils
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from matplotlib.backend_bases import (
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_Backend, FigureCanvasBase, FigureManagerBase, NavigationToolbar2,
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TimerBase, ToolContainerBase, cursors, _Mode,
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CloseEvent, KeyEvent, LocationEvent, MouseEvent, ResizeEvent)
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from matplotlib._pylab_helpers import Gcf
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from . import _tkagg
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from ._tkagg import TK_PHOTO_COMPOSITE_OVERLAY, TK_PHOTO_COMPOSITE_SET
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_log = logging.getLogger(__name__)
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cursord = {
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cursors.MOVE: "fleur",
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cursors.HAND: "hand2",
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cursors.POINTER: "arrow",
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cursors.SELECT_REGION: "crosshair",
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cursors.WAIT: "watch",
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cursors.RESIZE_HORIZONTAL: "sb_h_double_arrow",
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cursors.RESIZE_VERTICAL: "sb_v_double_arrow",
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}
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@contextmanager
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def _restore_foreground_window_at_end():
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foreground = _c_internal_utils.Win32_GetForegroundWindow()
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try:
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yield
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finally:
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if foreground and mpl.rcParams['tk.window_focus']:
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_c_internal_utils.Win32_SetForegroundWindow(foreground)
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_blit_args = {}
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# Initialize to a non-empty string that is not a Tcl command
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_blit_tcl_name = "mpl_blit_" + uuid.uuid4().hex
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def _blit(argsid):
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"""
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Thin wrapper to blit called via tkapp.call.
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*argsid* is a unique string identifier to fetch the correct arguments from
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the ``_blit_args`` dict, since arguments cannot be passed directly.
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"""
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photoimage, data, offsets, bbox, comp_rule = _blit_args.pop(argsid)
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if not photoimage.tk.call("info", "commands", photoimage):
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return
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_tkagg.blit(photoimage.tk.interpaddr(), str(photoimage), data, comp_rule, offsets,
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bbox)
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def blit(photoimage, aggimage, offsets, bbox=None):
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"""
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Blit *aggimage* to *photoimage*.
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*offsets* is a tuple describing how to fill the ``offset`` field of the
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``Tk_PhotoImageBlock`` struct: it should be (0, 1, 2, 3) for RGBA8888 data,
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(2, 1, 0, 3) for little-endian ARBG32 (i.e. GBRA8888) data and (1, 2, 3, 0)
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for big-endian ARGB32 (i.e. ARGB8888) data.
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If *bbox* is passed, it defines the region that gets blitted. That region
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will be composed with the previous data according to the alpha channel.
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Blitting will be clipped to pixels inside the canvas, including silently
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doing nothing if the *bbox* region is entirely outside the canvas.
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Tcl events must be dispatched to trigger a blit from a non-Tcl thread.
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"""
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data = np.asarray(aggimage)
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height, width = data.shape[:2]
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if bbox is not None:
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(x1, y1), (x2, y2) = bbox.__array__()
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x1 = max(math.floor(x1), 0)
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x2 = min(math.ceil(x2), width)
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y1 = max(math.floor(y1), 0)
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y2 = min(math.ceil(y2), height)
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if (x1 > x2) or (y1 > y2):
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return
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bboxptr = (x1, x2, y1, y2)
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comp_rule = TK_PHOTO_COMPOSITE_OVERLAY
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else:
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bboxptr = (0, width, 0, height)
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comp_rule = TK_PHOTO_COMPOSITE_SET
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# NOTE: _tkagg.blit is thread unsafe and will crash the process if called
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# from a thread (GH#13293). Instead of blanking and blitting here,
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# use tkapp.call to post a cross-thread event if this function is called
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# from a non-Tcl thread.
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# tkapp.call coerces all arguments to strings, so to avoid string parsing
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# within _blit, pack up the arguments into a global data structure.
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args = photoimage, data, offsets, bboxptr, comp_rule
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# Need a unique key to avoid thread races.
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# Again, make the key a string to avoid string parsing in _blit.
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argsid = str(id(args))
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_blit_args[argsid] = args
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try:
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photoimage.tk.call(_blit_tcl_name, argsid)
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except tk.TclError as e:
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if "invalid command name" not in str(e):
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raise
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photoimage.tk.createcommand(_blit_tcl_name, _blit)
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photoimage.tk.call(_blit_tcl_name, argsid)
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class TimerTk(TimerBase):
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"""Subclass of `backend_bases.TimerBase` using Tk timer events."""
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def __init__(self, parent, *args, **kwargs):
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self._timer = None
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super().__init__(*args, **kwargs)
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self.parent = parent
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def _timer_start(self):
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self._timer_stop()
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self._timer = self.parent.after(self._interval, self._on_timer)
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def _timer_stop(self):
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if self._timer is not None:
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self.parent.after_cancel(self._timer)
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self._timer = None
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def _on_timer(self):
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super()._on_timer()
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# Tk after() is only a single shot, so we need to add code here to
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# reset the timer if we're not operating in single shot mode. However,
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# if _timer is None, this means that _timer_stop has been called; so
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# don't recreate the timer in that case.
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if not self._single and self._timer:
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if self._interval > 0:
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self._timer = self.parent.after(self._interval, self._on_timer)
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else:
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# Edge case: Tcl after 0 *prepends* events to the queue
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# so a 0 interval does not allow any other events to run.
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# This incantation is cancellable and runs as fast as possible
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# while also allowing events and drawing every frame. GH#18236
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self._timer = self.parent.after_idle(
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lambda: self.parent.after(self._interval, self._on_timer)
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)
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else:
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self._timer = None
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class FigureCanvasTk(FigureCanvasBase):
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required_interactive_framework = "tk"
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manager_class = _api.classproperty(lambda cls: FigureManagerTk)
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def __init__(self, figure=None, master=None):
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super().__init__(figure)
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self._idle_draw_id = None
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self._event_loop_id = None
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w, h = self.get_width_height(physical=True)
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self._tkcanvas = tk.Canvas(
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master=master, background="white",
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width=w, height=h, borderwidth=0, highlightthickness=0)
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self._tkphoto = tk.PhotoImage(
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master=self._tkcanvas, width=w, height=h)
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self._tkcanvas_image_region = self._tkcanvas.create_image(
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w//2, h//2, image=self._tkphoto)
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self._tkcanvas.bind("<Configure>", self.resize)
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if sys.platform == 'win32':
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self._tkcanvas.bind("<Map>", self._update_device_pixel_ratio)
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self._tkcanvas.bind("<Key>", self.key_press)
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self._tkcanvas.bind("<Motion>", self.motion_notify_event)
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self._tkcanvas.bind("<Enter>", self.enter_notify_event)
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self._tkcanvas.bind("<Leave>", self.leave_notify_event)
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self._tkcanvas.bind("<KeyRelease>", self.key_release)
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for name in ["<Button-1>", "<Button-2>", "<Button-3>"]:
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self._tkcanvas.bind(name, self.button_press_event)
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for name in [
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"<Double-Button-1>", "<Double-Button-2>", "<Double-Button-3>"]:
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self._tkcanvas.bind(name, self.button_dblclick_event)
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for name in [
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"<ButtonRelease-1>", "<ButtonRelease-2>", "<ButtonRelease-3>"]:
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self._tkcanvas.bind(name, self.button_release_event)
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# Mouse wheel on Linux generates button 4/5 events
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for name in "<Button-4>", "<Button-5>":
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self._tkcanvas.bind(name, self.scroll_event)
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# Mouse wheel for windows goes to the window with the focus.
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# Since the canvas won't usually have the focus, bind the
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# event to the window containing the canvas instead.
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# See https://wiki.tcl-lang.org/3893 (mousewheel) for details
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root = self._tkcanvas.winfo_toplevel()
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# Prevent long-lived references via tkinter callback structure GH-24820
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weakself = weakref.ref(self)
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weakroot = weakref.ref(root)
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def scroll_event_windows(event):
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self = weakself()
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if self is None:
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root = weakroot()
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if root is not None:
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root.unbind("<MouseWheel>", scroll_event_windows_id)
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return
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return self.scroll_event_windows(event)
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scroll_event_windows_id = root.bind("<MouseWheel>", scroll_event_windows, "+")
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# Can't get destroy events by binding to _tkcanvas. Therefore, bind
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# to the window and filter.
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def filter_destroy(event):
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self = weakself()
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if self is None:
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root = weakroot()
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if root is not None:
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root.unbind("<Destroy>", filter_destroy_id)
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return
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if event.widget is self._tkcanvas:
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CloseEvent("close_event", self)._process()
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filter_destroy_id = root.bind("<Destroy>", filter_destroy, "+")
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self._tkcanvas.focus_set()
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self._rubberband_rect_black = None
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self._rubberband_rect_white = None
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def _update_device_pixel_ratio(self, event=None):
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# Tk gives scaling with respect to 72 DPI, but Windows screens are
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# scaled vs 96 dpi, and pixel ratio settings are given in whole
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# percentages, so round to 2 digits.
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ratio = round(self._tkcanvas.tk.call('tk', 'scaling') / (96 / 72), 2)
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if self._set_device_pixel_ratio(ratio):
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# The easiest way to resize the canvas is to resize the canvas
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# widget itself, since we implement all the logic for resizing the
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# canvas backing store on that event.
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w, h = self.get_width_height(physical=True)
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self._tkcanvas.configure(width=w, height=h)
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def resize(self, event):
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width, height = event.width, event.height
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# compute desired figure size in inches
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dpival = self.figure.dpi
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winch = width / dpival
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hinch = height / dpival
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self.figure.set_size_inches(winch, hinch, forward=False)
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self._tkcanvas.delete(self._tkcanvas_image_region)
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self._tkphoto.configure(width=int(width), height=int(height))
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self._tkcanvas_image_region = self._tkcanvas.create_image(
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int(width / 2), int(height / 2), image=self._tkphoto)
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ResizeEvent("resize_event", self)._process()
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self.draw_idle()
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def draw_idle(self):
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# docstring inherited
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if self._idle_draw_id:
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return
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def idle_draw(*args):
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try:
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self.draw()
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finally:
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self._idle_draw_id = None
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self._idle_draw_id = self._tkcanvas.after_idle(idle_draw)
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def get_tk_widget(self):
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"""
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Return the Tk widget used to implement FigureCanvasTkAgg.
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Although the initial implementation uses a Tk canvas, this routine
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is intended to hide that fact.
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"""
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return self._tkcanvas
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def _event_mpl_coords(self, event):
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# calling canvasx/canvasy allows taking scrollbars into account (i.e.
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# the top of the widget may have been scrolled out of view).
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return (self._tkcanvas.canvasx(event.x),
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# flipy so y=0 is bottom of canvas
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self.figure.bbox.height - self._tkcanvas.canvasy(event.y))
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def motion_notify_event(self, event):
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MouseEvent("motion_notify_event", self,
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*self._event_mpl_coords(event),
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modifiers=self._mpl_modifiers(event),
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guiEvent=event)._process()
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def enter_notify_event(self, event):
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LocationEvent("figure_enter_event", self,
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*self._event_mpl_coords(event),
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modifiers=self._mpl_modifiers(event),
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guiEvent=event)._process()
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def leave_notify_event(self, event):
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LocationEvent("figure_leave_event", self,
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*self._event_mpl_coords(event),
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modifiers=self._mpl_modifiers(event),
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guiEvent=event)._process()
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def button_press_event(self, event, dblclick=False):
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# set focus to the canvas so that it can receive keyboard events
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self._tkcanvas.focus_set()
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num = getattr(event, 'num', None)
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if sys.platform == 'darwin': # 2 and 3 are reversed.
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num = {2: 3, 3: 2}.get(num, num)
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MouseEvent("button_press_event", self,
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*self._event_mpl_coords(event), num, dblclick=dblclick,
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modifiers=self._mpl_modifiers(event),
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guiEvent=event)._process()
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def button_dblclick_event(self, event):
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self.button_press_event(event, dblclick=True)
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def button_release_event(self, event):
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num = getattr(event, 'num', None)
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if sys.platform == 'darwin': # 2 and 3 are reversed.
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num = {2: 3, 3: 2}.get(num, num)
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MouseEvent("button_release_event", self,
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*self._event_mpl_coords(event), num,
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modifiers=self._mpl_modifiers(event),
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guiEvent=event)._process()
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def scroll_event(self, event):
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num = getattr(event, 'num', None)
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step = 1 if num == 4 else -1 if num == 5 else 0
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MouseEvent("scroll_event", self,
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*self._event_mpl_coords(event), step=step,
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modifiers=self._mpl_modifiers(event),
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guiEvent=event)._process()
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def scroll_event_windows(self, event):
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"""MouseWheel event processor"""
|
||
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# need to find the window that contains the mouse
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||
|
|
w = event.widget.winfo_containing(event.x_root, event.y_root)
|
||
|
|
if w != self._tkcanvas:
|
||
|
|
return
|
||
|
|
x = self._tkcanvas.canvasx(event.x_root - w.winfo_rootx())
|
||
|
|
y = (self.figure.bbox.height
|
||
|
|
- self._tkcanvas.canvasy(event.y_root - w.winfo_rooty()))
|
||
|
|
step = event.delta / 120
|
||
|
|
MouseEvent("scroll_event", self,
|
||
|
|
x, y, step=step, modifiers=self._mpl_modifiers(event),
|
||
|
|
guiEvent=event)._process()
|
||
|
|
|
||
|
|
@staticmethod
|
||
|
|
def _mpl_modifiers(event, *, exclude=None):
|
||
|
|
# add modifier keys to the key string. Bit details originate from
|
||
|
|
# http://effbot.org/tkinterbook/tkinter-events-and-bindings.htm
|
||
|
|
# BIT_SHIFT = 0x001; BIT_CAPSLOCK = 0x002; BIT_CONTROL = 0x004;
|
||
|
|
# BIT_LEFT_ALT = 0x008; BIT_NUMLOCK = 0x010; BIT_RIGHT_ALT = 0x080;
|
||
|
|
# BIT_MB_1 = 0x100; BIT_MB_2 = 0x200; BIT_MB_3 = 0x400;
|
||
|
|
# In general, the modifier key is excluded from the modifier flag,
|
||
|
|
# however this is not the case on "darwin", so double check that
|
||
|
|
# we aren't adding repeat modifier flags to a modifier key.
|
||
|
|
modifiers = [
|
||
|
|
("ctrl", 1 << 2, "control"),
|
||
|
|
("alt", 1 << 17, "alt"),
|
||
|
|
("shift", 1 << 0, "shift"),
|
||
|
|
] if sys.platform == "win32" else [
|
||
|
|
("ctrl", 1 << 2, "control"),
|
||
|
|
("alt", 1 << 4, "alt"),
|
||
|
|
("shift", 1 << 0, "shift"),
|
||
|
|
("cmd", 1 << 3, "cmd"),
|
||
|
|
] if sys.platform == "darwin" else [
|
||
|
|
("ctrl", 1 << 2, "control"),
|
||
|
|
("alt", 1 << 3, "alt"),
|
||
|
|
("shift", 1 << 0, "shift"),
|
||
|
|
("super", 1 << 6, "super"),
|
||
|
|
]
|
||
|
|
return [name for name, mask, key in modifiers
|
||
|
|
if event.state & mask and exclude != key]
|
||
|
|
|
||
|
|
def _get_key(self, event):
|
||
|
|
unikey = event.char
|
||
|
|
key = cbook._unikey_or_keysym_to_mplkey(unikey, event.keysym)
|
||
|
|
if key is not None:
|
||
|
|
mods = self._mpl_modifiers(event, exclude=key)
|
||
|
|
# shift is not added to the keys as this is already accounted for.
|
||
|
|
if "shift" in mods and unikey:
|
||
|
|
mods.remove("shift")
|
||
|
|
return "+".join([*mods, key])
|
||
|
|
|
||
|
|
def key_press(self, event):
|
||
|
|
KeyEvent("key_press_event", self,
|
||
|
|
self._get_key(event), *self._event_mpl_coords(event),
|
||
|
|
guiEvent=event)._process()
|
||
|
|
|
||
|
|
def key_release(self, event):
|
||
|
|
KeyEvent("key_release_event", self,
|
||
|
|
self._get_key(event), *self._event_mpl_coords(event),
|
||
|
|
guiEvent=event)._process()
|
||
|
|
|
||
|
|
def new_timer(self, *args, **kwargs):
|
||
|
|
# docstring inherited
|
||
|
|
return TimerTk(self._tkcanvas, *args, **kwargs)
|
||
|
|
|
||
|
|
def flush_events(self):
|
||
|
|
# docstring inherited
|
||
|
|
self._tkcanvas.update()
|
||
|
|
|
||
|
|
def start_event_loop(self, timeout=0):
|
||
|
|
# docstring inherited
|
||
|
|
if timeout > 0:
|
||
|
|
milliseconds = int(1000 * timeout)
|
||
|
|
if milliseconds > 0:
|
||
|
|
self._event_loop_id = self._tkcanvas.after(
|
||
|
|
milliseconds, self.stop_event_loop)
|
||
|
|
else:
|
||
|
|
self._event_loop_id = self._tkcanvas.after_idle(
|
||
|
|
self.stop_event_loop)
|
||
|
|
self._tkcanvas.mainloop()
|
||
|
|
|
||
|
|
def stop_event_loop(self):
|
||
|
|
# docstring inherited
|
||
|
|
if self._event_loop_id:
|
||
|
|
self._tkcanvas.after_cancel(self._event_loop_id)
|
||
|
|
self._event_loop_id = None
|
||
|
|
self._tkcanvas.quit()
|
||
|
|
|
||
|
|
def set_cursor(self, cursor):
|
||
|
|
try:
|
||
|
|
self._tkcanvas.configure(cursor=cursord[cursor])
|
||
|
|
except tkinter.TclError:
|
||
|
|
pass
|
||
|
|
|
||
|
|
|
||
|
|
class FigureManagerTk(FigureManagerBase):
|
||
|
|
"""
|
||
|
|
Attributes
|
||
|
|
----------
|
||
|
|
canvas : `FigureCanvas`
|
||
|
|
The FigureCanvas instance
|
||
|
|
num : int or str
|
||
|
|
The Figure number
|
||
|
|
toolbar : tk.Toolbar
|
||
|
|
The tk.Toolbar
|
||
|
|
window : tk.Window
|
||
|
|
The tk.Window
|
||
|
|
"""
|
||
|
|
|
||
|
|
_owns_mainloop = False
|
||
|
|
|
||
|
|
def __init__(self, canvas, num, window):
|
||
|
|
self.window = window
|
||
|
|
super().__init__(canvas, num)
|
||
|
|
self.window.withdraw()
|
||
|
|
# packing toolbar first, because if space is getting low, last packed
|
||
|
|
# widget is getting shrunk first (-> the canvas)
|
||
|
|
self.canvas._tkcanvas.pack(side=tk.TOP, fill=tk.BOTH, expand=1)
|
||
|
|
|
||
|
|
# 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.
|
||
|
|
window_frame = int(window.wm_frame(), 16)
|
||
|
|
self._window_dpi = tk.IntVar(master=window, value=96,
|
||
|
|
name=f'window_dpi{window_frame}')
|
||
|
|
self._window_dpi_cbname = ''
|
||
|
|
if _tkagg.enable_dpi_awareness(window_frame, window.tk.interpaddr()):
|
||
|
|
self._window_dpi_cbname = self._window_dpi.trace_add(
|
||
|
|
'write', self._update_window_dpi)
|
||
|
|
|
||
|
|
self._shown = False
|
||
|
|
|
||
|
|
@classmethod
|
||
|
|
def create_with_canvas(cls, canvas_class, figure, num):
|
||
|
|
# docstring inherited
|
||
|
|
with _restore_foreground_window_at_end():
|
||
|
|
if cbook._get_running_interactive_framework() is None:
|
||
|
|
cbook._setup_new_guiapp()
|
||
|
|
_c_internal_utils.Win32_SetProcessDpiAwareness_max()
|
||
|
|
window = tk.Tk(className="matplotlib")
|
||
|
|
window.withdraw()
|
||
|
|
|
||
|
|
# Put a Matplotlib icon on the window rather than the default tk
|
||
|
|
# icon. See https://www.tcl.tk/man/tcl/TkCmd/wm.html#M50
|
||
|
|
#
|
||
|
|
# `ImageTk` can be replaced with `tk` whenever the minimum
|
||
|
|
# supported Tk version is increased to 8.6, as Tk 8.6+ natively
|
||
|
|
# supports PNG images.
|
||
|
|
icon_fname = str(cbook._get_data_path(
|
||
|
|
'images/matplotlib.png'))
|
||
|
|
icon_img = ImageTk.PhotoImage(file=icon_fname, master=window)
|
||
|
|
|
||
|
|
icon_fname_large = str(cbook._get_data_path(
|
||
|
|
'images/matplotlib_large.png'))
|
||
|
|
icon_img_large = ImageTk.PhotoImage(
|
||
|
|
file=icon_fname_large, master=window)
|
||
|
|
|
||
|
|
window.iconphoto(False, icon_img_large, icon_img)
|
||
|
|
|
||
|
|
canvas = canvas_class(figure, master=window)
|
||
|
|
manager = cls(canvas, num, window)
|
||
|
|
if mpl.is_interactive():
|
||
|
|
manager.show()
|
||
|
|
canvas.draw_idle()
|
||
|
|
return manager
|
||
|
|
|
||
|
|
@classmethod
|
||
|
|
def start_main_loop(cls):
|
||
|
|
managers = Gcf.get_all_fig_managers()
|
||
|
|
if managers:
|
||
|
|
first_manager = managers[0]
|
||
|
|
manager_class = type(first_manager)
|
||
|
|
if manager_class._owns_mainloop:
|
||
|
|
return
|
||
|
|
manager_class._owns_mainloop = True
|
||
|
|
try:
|
||
|
|
first_manager.window.mainloop()
|
||
|
|
finally:
|
||
|
|
manager_class._owns_mainloop = False
|
||
|
|
|
||
|
|
def _update_window_dpi(self, *args):
|
||
|
|
newdpi = self._window_dpi.get()
|
||
|
|
self.window.call('tk', 'scaling', newdpi / 72)
|
||
|
|
if self.toolbar and hasattr(self.toolbar, '_rescale'):
|
||
|
|
self.toolbar._rescale()
|
||
|
|
self.canvas._update_device_pixel_ratio()
|
||
|
|
|
||
|
|
def resize(self, width, height):
|
||
|
|
max_size = 1_400_000 # the measured max on xorg 1.20.8 was 1_409_023
|
||
|
|
|
||
|
|
if (width > max_size or height > max_size) and sys.platform == 'linux':
|
||
|
|
raise ValueError(
|
||
|
|
'You have requested to resize the '
|
||
|
|
f'Tk window to ({width}, {height}), one of which '
|
||
|
|
f'is bigger than {max_size}. At larger sizes xorg will '
|
||
|
|
'either exit with an error on newer versions (~1.20) or '
|
||
|
|
'cause corruption on older version (~1.19). We '
|
||
|
|
'do not expect a window over a million pixel wide or tall '
|
||
|
|
'to be intended behavior.')
|
||
|
|
self.canvas._tkcanvas.configure(width=width, height=height)
|
||
|
|
|
||
|
|
def show(self):
|
||
|
|
with _restore_foreground_window_at_end():
|
||
|
|
if not self._shown:
|
||
|
|
def destroy(*args):
|
||
|
|
Gcf.destroy(self)
|
||
|
|
self.window.protocol("WM_DELETE_WINDOW", destroy)
|
||
|
|
self.window.deiconify()
|
||
|
|
self.canvas._tkcanvas.focus_set()
|
||
|
|
else:
|
||
|
|
self.canvas.draw_idle()
|
||
|
|
if mpl.rcParams['figure.raise_window']:
|
||
|
|
self.canvas.manager.window.attributes('-topmost', 1)
|
||
|
|
self.canvas.manager.window.attributes('-topmost', 0)
|
||
|
|
self._shown = True
|
||
|
|
|
||
|
|
def destroy(self, *args):
|
||
|
|
if self.canvas._idle_draw_id:
|
||
|
|
self.canvas._tkcanvas.after_cancel(self.canvas._idle_draw_id)
|
||
|
|
if self.canvas._event_loop_id:
|
||
|
|
self.canvas._tkcanvas.after_cancel(self.canvas._event_loop_id)
|
||
|
|
if self._window_dpi_cbname:
|
||
|
|
self._window_dpi.trace_remove('write', self._window_dpi_cbname)
|
||
|
|
|
||
|
|
# NOTE: events need to be flushed before issuing destroy (GH #9956),
|
||
|
|
# however, self.window.update() can break user code. An async callback
|
||
|
|
# is the safest way to achieve a complete draining of the event queue,
|
||
|
|
# but it leaks if no tk event loop is running. Therefore we explicitly
|
||
|
|
# check for an event loop and choose our best guess.
|
||
|
|
def delayed_destroy():
|
||
|
|
self.window.destroy()
|
||
|
|
|
||
|
|
if self._owns_mainloop and not Gcf.get_num_fig_managers():
|
||
|
|
self.window.quit()
|
||
|
|
|
||
|
|
if cbook._get_running_interactive_framework() == "tk":
|
||
|
|
# "after idle after 0" avoids Tcl error/race (GH #19940)
|
||
|
|
self.window.after_idle(self.window.after, 0, delayed_destroy)
|
||
|
|
else:
|
||
|
|
self.window.update()
|
||
|
|
delayed_destroy()
|
||
|
|
|
||
|
|
def get_window_title(self):
|
||
|
|
return self.window.wm_title()
|
||
|
|
|
||
|
|
def set_window_title(self, title):
|
||
|
|
self.window.wm_title(title)
|
||
|
|
|
||
|
|
def full_screen_toggle(self):
|
||
|
|
is_fullscreen = bool(self.window.attributes('-fullscreen'))
|
||
|
|
self.window.attributes('-fullscreen', not is_fullscreen)
|
||
|
|
|
||
|
|
|
||
|
|
class NavigationToolbar2Tk(NavigationToolbar2, tk.Frame):
|
||
|
|
def __init__(self, canvas, window=None, *, pack_toolbar=True):
|
||
|
|
"""
|
||
|
|
Parameters
|
||
|
|
----------
|
||
|
|
canvas : `FigureCanvas`
|
||
|
|
The figure canvas on which to operate.
|
||
|
|
window : tk.Window
|
||
|
|
The tk.Window which owns this toolbar.
|
||
|
|
pack_toolbar : bool, default: True
|
||
|
|
If True, add the toolbar to the parent's pack manager's packing
|
||
|
|
list during initialization with ``side="bottom"`` and ``fill="x"``.
|
||
|
|
If you want to use the toolbar with a different layout manager, use
|
||
|
|
``pack_toolbar=False``.
|
||
|
|
"""
|
||
|
|
|
||
|
|
if window is None:
|
||
|
|
window = canvas.get_tk_widget().master
|
||
|
|
tk.Frame.__init__(self, master=window, borderwidth=2,
|
||
|
|
width=int(canvas.figure.bbox.width), height=50)
|
||
|
|
|
||
|
|
self._buttons = {}
|
||
|
|
for text, tooltip_text, image_file, callback in self.toolitems:
|
||
|
|
if text is None:
|
||
|
|
# Add a spacer; return value is unused.
|
||
|
|
self._Spacer()
|
||
|
|
else:
|
||
|
|
self._buttons[text] = button = self._Button(
|
||
|
|
text,
|
||
|
|
str(cbook._get_data_path(f"images/{image_file}.png")),
|
||
|
|
toggle=callback in ["zoom", "pan"],
|
||
|
|
command=getattr(self, callback),
|
||
|
|
)
|
||
|
|
if tooltip_text is not None:
|
||
|
|
add_tooltip(button, tooltip_text)
|
||
|
|
|
||
|
|
self._label_font = tkinter.font.Font(root=window, size=10)
|
||
|
|
|
||
|
|
# This filler item ensures the toolbar is always at least two text
|
||
|
|
# lines high. Otherwise the canvas gets redrawn as the mouse hovers
|
||
|
|
# over images because those use two-line messages which resize the
|
||
|
|
# toolbar.
|
||
|
|
label = tk.Label(master=self, font=self._label_font,
|
||
|
|
text='\N{NO-BREAK SPACE}\n\N{NO-BREAK SPACE}')
|
||
|
|
label.pack(side=tk.RIGHT)
|
||
|
|
|
||
|
|
self.message = tk.StringVar(master=self)
|
||
|
|
self._message_label = tk.Label(master=self, font=self._label_font,
|
||
|
|
textvariable=self.message,
|
||
|
|
justify=tk.RIGHT)
|
||
|
|
self._message_label.pack(side=tk.RIGHT)
|
||
|
|
|
||
|
|
NavigationToolbar2.__init__(self, canvas)
|
||
|
|
if pack_toolbar:
|
||
|
|
self.pack(side=tk.BOTTOM, fill=tk.X)
|
||
|
|
|
||
|
|
def _rescale(self):
|
||
|
|
"""
|
||
|
|
Scale all children of the toolbar to current DPI setting.
|
||
|
|
|
||
|
|
Before this is called, the Tk scaling setting will have been updated to
|
||
|
|
match the new DPI. Tk widgets do not update for changes to scaling, but
|
||
|
|
all measurements made after the change will match the new scaling. Thus
|
||
|
|
this function re-applies all the same sizes in points, which Tk will
|
||
|
|
scale correctly to pixels.
|
||
|
|
"""
|
||
|
|
for widget in self.winfo_children():
|
||
|
|
if isinstance(widget, (tk.Button, tk.Checkbutton)):
|
||
|
|
if hasattr(widget, '_image_file'):
|
||
|
|
# Explicit class because ToolbarTk calls _rescale.
|
||
|
|
NavigationToolbar2Tk._set_image_for_button(self, widget)
|
||
|
|
else:
|
||
|
|
# Text-only button is handled by the font setting instead.
|
||
|
|
pass
|
||
|
|
elif isinstance(widget, tk.Frame):
|
||
|
|
widget.configure(height='18p')
|
||
|
|
widget.pack_configure(padx='3p')
|
||
|
|
elif isinstance(widget, tk.Label):
|
||
|
|
pass # Text is handled by the font setting instead.
|
||
|
|
else:
|
||
|
|
_log.warning('Unknown child class %s', widget.winfo_class)
|
||
|
|
self._label_font.configure(size=10)
|
||
|
|
|
||
|
|
def _update_buttons_checked(self):
|
||
|
|
# sync button checkstates to match active mode
|
||
|
|
for text, mode in [('Zoom', _Mode.ZOOM), ('Pan', _Mode.PAN)]:
|
||
|
|
if text in self._buttons:
|
||
|
|
if self.mode == mode:
|
||
|
|
self._buttons[text].select() # NOT .invoke()
|
||
|
|
else:
|
||
|
|
self._buttons[text].deselect()
|
||
|
|
|
||
|
|
def pan(self, *args):
|
||
|
|
super().pan(*args)
|
||
|
|
self._update_buttons_checked()
|
||
|
|
|
||
|
|
def zoom(self, *args):
|
||
|
|
super().zoom(*args)
|
||
|
|
self._update_buttons_checked()
|
||
|
|
|
||
|
|
def set_message(self, s):
|
||
|
|
self.message.set(s)
|
||
|
|
|
||
|
|
def draw_rubberband(self, event, x0, y0, x1, y1):
|
||
|
|
# Block copied from remove_rubberband for backend_tools convenience.
|
||
|
|
if self.canvas._rubberband_rect_white:
|
||
|
|
self.canvas._tkcanvas.delete(self.canvas._rubberband_rect_white)
|
||
|
|
if self.canvas._rubberband_rect_black:
|
||
|
|
self.canvas._tkcanvas.delete(self.canvas._rubberband_rect_black)
|
||
|
|
height = self.canvas.figure.bbox.height
|
||
|
|
y0 = height - y0
|
||
|
|
y1 = height - y1
|
||
|
|
self.canvas._rubberband_rect_black = (
|
||
|
|
self.canvas._tkcanvas.create_rectangle(
|
||
|
|
x0, y0, x1, y1))
|
||
|
|
self.canvas._rubberband_rect_white = (
|
||
|
|
self.canvas._tkcanvas.create_rectangle(
|
||
|
|
x0, y0, x1, y1, outline='white', dash=(3, 3)))
|
||
|
|
|
||
|
|
def remove_rubberband(self):
|
||
|
|
if self.canvas._rubberband_rect_white:
|
||
|
|
self.canvas._tkcanvas.delete(self.canvas._rubberband_rect_white)
|
||
|
|
self.canvas._rubberband_rect_white = None
|
||
|
|
if self.canvas._rubberband_rect_black:
|
||
|
|
self.canvas._tkcanvas.delete(self.canvas._rubberband_rect_black)
|
||
|
|
self.canvas._rubberband_rect_black = None
|
||
|
|
|
||
|
|
def _set_image_for_button(self, button):
|
||
|
|
"""
|
||
|
|
Set the image for a button based on its pixel size.
|
||
|
|
|
||
|
|
The pixel size is determined by the DPI scaling of the window.
|
||
|
|
"""
|
||
|
|
if button._image_file is None:
|
||
|
|
return
|
||
|
|
|
||
|
|
# Allow _image_file to be relative to Matplotlib's "images" data
|
||
|
|
# directory.
|
||
|
|
path_regular = cbook._get_data_path('images', button._image_file)
|
||
|
|
path_large = path_regular.with_name(
|
||
|
|
path_regular.name.replace('.png', '_large.png'))
|
||
|
|
size = button.winfo_pixels('18p')
|
||
|
|
|
||
|
|
# Nested functions because ToolbarTk calls _Button.
|
||
|
|
def _get_color(color_name):
|
||
|
|
# `winfo_rgb` returns an (r, g, b) tuple in the range 0-65535
|
||
|
|
return button.winfo_rgb(button.cget(color_name))
|
||
|
|
|
||
|
|
def _is_dark(color):
|
||
|
|
if isinstance(color, str):
|
||
|
|
color = _get_color(color)
|
||
|
|
return max(color) < 65535 / 2
|
||
|
|
|
||
|
|
def _recolor_icon(image, color):
|
||
|
|
image_data = np.asarray(image).copy()
|
||
|
|
black_mask = (image_data[..., :3] == 0).all(axis=-1)
|
||
|
|
image_data[black_mask, :3] = color
|
||
|
|
return Image.fromarray(image_data, mode="RGBA")
|
||
|
|
|
||
|
|
# Use the high-resolution (48x48 px) icon if it exists and is needed
|
||
|
|
with Image.open(path_large if (size > 24 and path_large.exists())
|
||
|
|
else path_regular) as im:
|
||
|
|
# assure a RGBA image as foreground color is RGB
|
||
|
|
im = im.convert("RGBA")
|
||
|
|
image = ImageTk.PhotoImage(im.resize((size, size)), master=self)
|
||
|
|
button._ntimage = image
|
||
|
|
|
||
|
|
# create a version of the icon with the button's text color
|
||
|
|
foreground = (255 / 65535) * np.array(
|
||
|
|
button.winfo_rgb(button.cget("foreground")))
|
||
|
|
im_alt = _recolor_icon(im, foreground)
|
||
|
|
image_alt = ImageTk.PhotoImage(
|
||
|
|
im_alt.resize((size, size)), master=self)
|
||
|
|
button._ntimage_alt = image_alt
|
||
|
|
|
||
|
|
if _is_dark("background"):
|
||
|
|
# For Checkbuttons, we need to set `image` and `selectimage` at
|
||
|
|
# the same time. Otherwise, when updating the `image` option
|
||
|
|
# (such as when changing DPI), if the old `selectimage` has
|
||
|
|
# just been overwritten, Tk will throw an error.
|
||
|
|
image_kwargs = {"image": image_alt}
|
||
|
|
else:
|
||
|
|
image_kwargs = {"image": image}
|
||
|
|
# Checkbuttons may switch the background to `selectcolor` in the
|
||
|
|
# checked state, so check separately which image it needs to use in
|
||
|
|
# that state to still ensure enough contrast with the background.
|
||
|
|
if (
|
||
|
|
isinstance(button, tk.Checkbutton)
|
||
|
|
and button.cget("selectcolor") != ""
|
||
|
|
):
|
||
|
|
if self._windowingsystem != "x11":
|
||
|
|
selectcolor = "selectcolor"
|
||
|
|
else:
|
||
|
|
# On X11, selectcolor isn't used directly for indicator-less
|
||
|
|
# buttons. See `::tk::CheckEnter` in the Tk button.tcl source
|
||
|
|
# code for details.
|
||
|
|
r1, g1, b1 = _get_color("selectcolor")
|
||
|
|
r2, g2, b2 = _get_color("activebackground")
|
||
|
|
selectcolor = ((r1+r2)/2, (g1+g2)/2, (b1+b2)/2)
|
||
|
|
if _is_dark(selectcolor):
|
||
|
|
image_kwargs["selectimage"] = image_alt
|
||
|
|
else:
|
||
|
|
image_kwargs["selectimage"] = image
|
||
|
|
|
||
|
|
button.configure(**image_kwargs, height='18p', width='18p')
|
||
|
|
|
||
|
|
def _Button(self, text, image_file, toggle, command):
|
||
|
|
if not toggle:
|
||
|
|
b = tk.Button(
|
||
|
|
master=self, text=text, command=command,
|
||
|
|
relief="flat", overrelief="groove", borderwidth=1,
|
||
|
|
)
|
||
|
|
else:
|
||
|
|
# There is a bug in tkinter included in some python 3.6 versions
|
||
|
|
# that without this variable, produces a "visual" toggling of
|
||
|
|
# other near checkbuttons
|
||
|
|
# https://bugs.python.org/issue29402
|
||
|
|
# https://bugs.python.org/issue25684
|
||
|
|
var = tk.IntVar(master=self)
|
||
|
|
b = tk.Checkbutton(
|
||
|
|
master=self, text=text, command=command, indicatoron=False,
|
||
|
|
variable=var, offrelief="flat", overrelief="groove",
|
||
|
|
borderwidth=1
|
||
|
|
)
|
||
|
|
b.var = var
|
||
|
|
b._image_file = image_file
|
||
|
|
if image_file is not None:
|
||
|
|
# Explicit class because ToolbarTk calls _Button.
|
||
|
|
NavigationToolbar2Tk._set_image_for_button(self, b)
|
||
|
|
else:
|
||
|
|
b.configure(font=self._label_font)
|
||
|
|
b.pack(side=tk.LEFT)
|
||
|
|
return b
|
||
|
|
|
||
|
|
def _Spacer(self):
|
||
|
|
# Buttons are also 18pt high.
|
||
|
|
s = tk.Frame(master=self, height='18p', relief=tk.RIDGE, bg='DarkGray')
|
||
|
|
s.pack(side=tk.LEFT, padx='3p')
|
||
|
|
return s
|
||
|
|
|
||
|
|
def save_figure(self, *args):
|
||
|
|
filetypes = self.canvas.get_supported_filetypes_grouped()
|
||
|
|
tk_filetypes = [
|
||
|
|
(name, " ".join(f"*.{ext}" for ext in exts))
|
||
|
|
for name, exts in sorted(filetypes.items())
|
||
|
|
]
|
||
|
|
|
||
|
|
default_extension = self.canvas.get_default_filetype()
|
||
|
|
default_filetype = self.canvas.get_supported_filetypes()[default_extension]
|
||
|
|
filetype_variable = tk.StringVar(self.canvas.get_tk_widget(), default_filetype)
|
||
|
|
|
||
|
|
# adding a default extension seems to break the
|
||
|
|
# asksaveasfilename dialog when you choose various save types
|
||
|
|
# from the dropdown. Passing in the empty string seems to
|
||
|
|
# work - JDH!
|
||
|
|
# defaultextension = self.canvas.get_default_filetype()
|
||
|
|
defaultextension = ''
|
||
|
|
initialdir = os.path.expanduser(mpl.rcParams['savefig.directory'])
|
||
|
|
# get_default_filename() contains the default extension. On some platforms,
|
||
|
|
# choosing a different extension from the dropdown does not overwrite it,
|
||
|
|
# so we need to remove it to make the dropdown functional.
|
||
|
|
initialfile = pathlib.Path(self.canvas.get_default_filename()).stem
|
||
|
|
fname = tkinter.filedialog.asksaveasfilename(
|
||
|
|
master=self.canvas.get_tk_widget().master,
|
||
|
|
title='Save the figure',
|
||
|
|
filetypes=tk_filetypes,
|
||
|
|
defaultextension=defaultextension,
|
||
|
|
initialdir=initialdir,
|
||
|
|
initialfile=initialfile,
|
||
|
|
typevariable=filetype_variable
|
||
|
|
)
|
||
|
|
|
||
|
|
if fname in ["", ()]:
|
||
|
|
return
|
||
|
|
# Save dir for next time, unless empty str (i.e., use cwd).
|
||
|
|
if initialdir != "":
|
||
|
|
mpl.rcParams['savefig.directory'] = (
|
||
|
|
os.path.dirname(str(fname)))
|
||
|
|
|
||
|
|
# If the filename contains an extension, let savefig() infer the file
|
||
|
|
# format from that. If it does not, use the selected dropdown option.
|
||
|
|
if pathlib.Path(fname).suffix[1:] != "":
|
||
|
|
extension = None
|
||
|
|
else:
|
||
|
|
extension = filetypes[filetype_variable.get()][0]
|
||
|
|
|
||
|
|
try:
|
||
|
|
self.canvas.figure.savefig(fname, format=extension)
|
||
|
|
except Exception as e:
|
||
|
|
tkinter.messagebox.showerror("Error saving file", str(e))
|
||
|
|
|
||
|
|
def set_history_buttons(self):
|
||
|
|
state_map = {True: tk.NORMAL, False: tk.DISABLED}
|
||
|
|
can_back = self._nav_stack._pos > 0
|
||
|
|
can_forward = self._nav_stack._pos < len(self._nav_stack) - 1
|
||
|
|
if "Back" in self._buttons:
|
||
|
|
self._buttons['Back']['state'] = state_map[can_back]
|
||
|
|
if "Forward" in self._buttons:
|
||
|
|
self._buttons['Forward']['state'] = state_map[can_forward]
|
||
|
|
|
||
|
|
|
||
|
|
def add_tooltip(widget, text):
|
||
|
|
tipwindow = None
|
||
|
|
|
||
|
|
def showtip(event):
|
||
|
|
"""Display text in tooltip window."""
|
||
|
|
nonlocal tipwindow
|
||
|
|
if tipwindow or not text:
|
||
|
|
return
|
||
|
|
x, y, _, _ = widget.bbox("insert")
|
||
|
|
x = x + widget.winfo_rootx() + widget.winfo_width()
|
||
|
|
y = y + widget.winfo_rooty()
|
||
|
|
tipwindow = tk.Toplevel(widget)
|
||
|
|
tipwindow.overrideredirect(1)
|
||
|
|
tipwindow.geometry(f"+{x}+{y}")
|
||
|
|
try: # For Mac OS
|
||
|
|
tipwindow.tk.call("::tk::unsupported::MacWindowStyle",
|
||
|
|
"style", tipwindow._w,
|
||
|
|
"help", "noActivates")
|
||
|
|
except tk.TclError:
|
||
|
|
pass
|
||
|
|
label = tk.Label(tipwindow, text=text, justify=tk.LEFT,
|
||
|
|
relief=tk.SOLID, borderwidth=1)
|
||
|
|
label.pack(ipadx=1)
|
||
|
|
|
||
|
|
def hidetip(event):
|
||
|
|
nonlocal tipwindow
|
||
|
|
if tipwindow:
|
||
|
|
tipwindow.destroy()
|
||
|
|
tipwindow = None
|
||
|
|
|
||
|
|
widget.bind("<Enter>", showtip)
|
||
|
|
widget.bind("<Leave>", hidetip)
|
||
|
|
|
||
|
|
|
||
|
|
@backend_tools._register_tool_class(FigureCanvasTk)
|
||
|
|
class RubberbandTk(backend_tools.RubberbandBase):
|
||
|
|
def draw_rubberband(self, x0, y0, x1, y1):
|
||
|
|
NavigationToolbar2Tk.draw_rubberband(
|
||
|
|
self._make_classic_style_pseudo_toolbar(), None, x0, y0, x1, y1)
|
||
|
|
|
||
|
|
def remove_rubberband(self):
|
||
|
|
NavigationToolbar2Tk.remove_rubberband(
|
||
|
|
self._make_classic_style_pseudo_toolbar())
|
||
|
|
|
||
|
|
|
||
|
|
class ToolbarTk(ToolContainerBase, tk.Frame):
|
||
|
|
def __init__(self, toolmanager, window=None):
|
||
|
|
ToolContainerBase.__init__(self, toolmanager)
|
||
|
|
if window is None:
|
||
|
|
window = self.toolmanager.canvas.get_tk_widget().master
|
||
|
|
xmin, xmax = self.toolmanager.canvas.figure.bbox.intervalx
|
||
|
|
height, width = 50, xmax - xmin
|
||
|
|
tk.Frame.__init__(self, master=window,
|
||
|
|
width=int(width), height=int(height),
|
||
|
|
borderwidth=2)
|
||
|
|
self._label_font = tkinter.font.Font(size=10)
|
||
|
|
# This filler item ensures the toolbar is always at least two text
|
||
|
|
# lines high. Otherwise the canvas gets redrawn as the mouse hovers
|
||
|
|
# over images because those use two-line messages which resize the
|
||
|
|
# toolbar.
|
||
|
|
label = tk.Label(master=self, font=self._label_font,
|
||
|
|
text='\N{NO-BREAK SPACE}\n\N{NO-BREAK SPACE}')
|
||
|
|
label.pack(side=tk.RIGHT)
|
||
|
|
self._message = tk.StringVar(master=self)
|
||
|
|
self._message_label = tk.Label(master=self, font=self._label_font,
|
||
|
|
textvariable=self._message)
|
||
|
|
self._message_label.pack(side=tk.RIGHT)
|
||
|
|
self._toolitems = {}
|
||
|
|
self.pack(side=tk.TOP, fill=tk.X)
|
||
|
|
self._groups = {}
|
||
|
|
|
||
|
|
def _rescale(self):
|
||
|
|
return NavigationToolbar2Tk._rescale(self)
|
||
|
|
|
||
|
|
def add_toolitem(
|
||
|
|
self, name, group, position, image_file, description, toggle):
|
||
|
|
frame = self._get_groupframe(group)
|
||
|
|
buttons = frame.pack_slaves()
|
||
|
|
if position >= len(buttons) or position < 0:
|
||
|
|
before = None
|
||
|
|
else:
|
||
|
|
before = buttons[position]
|
||
|
|
button = NavigationToolbar2Tk._Button(frame, name, image_file, toggle,
|
||
|
|
lambda: self._button_click(name))
|
||
|
|
button.pack_configure(before=before)
|
||
|
|
if description is not None:
|
||
|
|
add_tooltip(button, description)
|
||
|
|
self._toolitems.setdefault(name, [])
|
||
|
|
self._toolitems[name].append(button)
|
||
|
|
|
||
|
|
def _get_groupframe(self, group):
|
||
|
|
if group not in self._groups:
|
||
|
|
if self._groups:
|
||
|
|
self._add_separator()
|
||
|
|
frame = tk.Frame(master=self, borderwidth=0)
|
||
|
|
frame.pack(side=tk.LEFT, fill=tk.Y)
|
||
|
|
frame._label_font = self._label_font
|
||
|
|
self._groups[group] = frame
|
||
|
|
return self._groups[group]
|
||
|
|
|
||
|
|
def _add_separator(self):
|
||
|
|
return NavigationToolbar2Tk._Spacer(self)
|
||
|
|
|
||
|
|
def _button_click(self, name):
|
||
|
|
self.trigger_tool(name)
|
||
|
|
|
||
|
|
def toggle_toolitem(self, name, toggled):
|
||
|
|
if name not in self._toolitems:
|
||
|
|
return
|
||
|
|
for toolitem in self._toolitems[name]:
|
||
|
|
if toggled:
|
||
|
|
toolitem.select()
|
||
|
|
else:
|
||
|
|
toolitem.deselect()
|
||
|
|
|
||
|
|
def remove_toolitem(self, name):
|
||
|
|
for toolitem in self._toolitems.pop(name, []):
|
||
|
|
toolitem.pack_forget()
|
||
|
|
|
||
|
|
def set_message(self, s):
|
||
|
|
self._message.set(s)
|
||
|
|
|
||
|
|
|
||
|
|
@backend_tools._register_tool_class(FigureCanvasTk)
|
||
|
|
class SaveFigureTk(backend_tools.SaveFigureBase):
|
||
|
|
def trigger(self, *args):
|
||
|
|
NavigationToolbar2Tk.save_figure(
|
||
|
|
self._make_classic_style_pseudo_toolbar())
|
||
|
|
|
||
|
|
|
||
|
|
@backend_tools._register_tool_class(FigureCanvasTk)
|
||
|
|
class ConfigureSubplotsTk(backend_tools.ConfigureSubplotsBase):
|
||
|
|
def trigger(self, *args):
|
||
|
|
NavigationToolbar2Tk.configure_subplots(self)
|
||
|
|
|
||
|
|
|
||
|
|
@backend_tools._register_tool_class(FigureCanvasTk)
|
||
|
|
class HelpTk(backend_tools.ToolHelpBase):
|
||
|
|
def trigger(self, *args):
|
||
|
|
dialog = SimpleDialog(
|
||
|
|
self.figure.canvas._tkcanvas, self._get_help_text(), ["OK"])
|
||
|
|
dialog.done = lambda num: dialog.frame.master.withdraw()
|
||
|
|
|
||
|
|
|
||
|
|
Toolbar = ToolbarTk
|
||
|
|
FigureManagerTk._toolbar2_class = NavigationToolbar2Tk
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FigureManagerTk._toolmanager_toolbar_class = ToolbarTk
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@_Backend.export
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class _BackendTk(_Backend):
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backend_version = tk.TkVersion
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FigureCanvas = FigureCanvasTk
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FigureManager = FigureManagerTk
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mainloop = FigureManagerTk.start_main_loop
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