如何从NavigationToolbar2Tk / FigureCanvasTkAgg中删除工具栏按钮

Question

我将tp / tkinter与matplotlib结合使用，遵循“ Embedding in Tk”

self._figure = Figure()
self._axes: matplotlib.axes.Axes = self._figure.add_subplot(111)
self._canvas = FigureCanvasTkAgg(self._figure, master=frame)

toolbar = NavigationToolbar2Tk(self._canvas, frame)
toolbar.update()

根据Tool Manager

self._figure.canvas.manager.toolmanager.remove_tool("pan")

应该可以，但是不能。

# self._figure.canvas does not have attribute 'manager'

从vs代码的屏幕截图中可以看到，FigureCanvasTkAgg没有属性'manager'：

如何删除工具栏按钮？

Answer 1

似乎Canvas中嵌入的NavigationToolbar2Tk和tkinter具有不同的结构和不同的功能。标准matplotlib窗口使用Qt作为后端。

---

toolbar = NavigationToolbar2Tk(self._canvas, frame)

列出有关按钮的信息

print(toolbar.toolitems)    

要删除Pan按钮-这是第四个按钮

toolbar.children['!button4'].pack_forget()

要将新功能分配给现有按钮-即Home

def my_function():
    print("Pressed Home")

toolbar.children['!button1'].config(command=my_function)

添加新按钮

button = tkinter.Button(master=toolbar, text="Quit", command=_quit)
#button.pack()
button.pack(side="left")

以相同的方式添加其他tkinter个小部件-Label，Entry等。

---

编辑：如评论中的ImportanceOfBeingErnest所述，它可以做得更优雅。

NavigationToolbar2Tk.toolitems = [t for t in NavigationToolbar2Tk.toolitems if
             t[0] not in ('Pan',)]

---

完整的示例

import tkinter

from matplotlib.backends.backend_tkagg import (
    FigureCanvasTkAgg, NavigationToolbar2Tk)
# Implement the default Matplotlib key bindings.
from matplotlib.backend_bases import key_press_handler
from matplotlib.figure import Figure

import numpy as np


root = tkinter.Tk()
root.wm_title("Embedding in Tk")

fig = Figure(figsize=(5, 4), dpi=100)
t = np.arange(0, 3, .01)
fig.add_subplot(111).plot(t, 2 * np.sin(2 * np.pi * t))

canvas = FigureCanvasTkAgg(fig, master=root)  # A tk.DrawingArea.
canvas.draw()
canvas.get_tk_widget().pack(side=tkinter.TOP, fill=tkinter.BOTH, expand=1)

# ---

NavigationToolbar2Tk.toolitems = [t for t in NavigationToolbar2Tk.toolitems if
                                  t[0] not in ('Pan',)]

# ---

toolbar = NavigationToolbar2Tk(canvas, root)
toolbar.update()

canvas.get_tk_widget().pack(side=tkinter.TOP, fill=tkinter.BOTH, expand=1)



print(toolbar.toolitems)

def on_key_press(event):
    print("you pressed {}".format(event.key))
    key_press_handler(event, canvas, toolbar)


canvas.mpl_connect("key_press_event", on_key_press)


def _quit():
    root.quit()     # stops mainloop
    root.destroy()  # this is necessary on Windows to prevent
                    # Fatal Python Error: PyEval_RestoreThread: NULL tstate


button = tkinter.Button(master=root, text="Quit", command=_quit)
button.pack(side=tkinter.BOTTOM)

tkinter.mainloop()
# If you put root.destroy() here, it will cause an error if the window is
# closed with the window manager.