如何从 NavigationToolbar2Tk/FigureCanvasTkAgg 中删除工具栏按钮 [英] How to remove toolbar button from NavigationToolbar2Tk/FigureCanvasTkAgg

问题描述

我将matplotlib与tk/tkinter一起使用，遵循"

如何删除工具栏按钮?

解决方案

嵌入在 tkinter 中的 Canvas 和 NavigationToolbar2Tk 似乎具有不同的结构，并且不同的功能.标准matplotlib 窗口使用Qt 作为后端.

<小时>

toolbar = NavigationToolbar2Tk(self._canvas, frame)

列出按钮信息

  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-即首页

  def my_function():打印(按下回家")工具栏.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 小部件- Label ， Entry 等

<小时>

正如评论中提到的ImportanceOfBeingErnest一样，它可以做得更优雅.

  NavigationToolbar2Tk.toolitems = [如果在NavigationToolbar2Tk.toolitems中为t，则为tt[0] 不在 ('Pan',)]

<小时>

完整的工作示例

导入tkinter从 matplotlib.backends.backend_tkagg 导入(FigureCanvasTkAgg, NavigationToolbar2Tk)# 实现默认的 Matplotlib 键绑定.从 matplotlib.backend_bases 导入 key_press_handlerfrom matplotlib.figure 导入图将numpy导入为np根 = tkinter.Tk()root.wm_title(嵌入Tk")无花果=图(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) # 一个 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 ift [0]不在('Pan'，)]中# ---工具栏= NavigationToolbar2Tk(画布，根目录)工具栏.update()canvas.get_tk_widget().pack(side = tkinter.TOP，fill = tkinter.BOTH，expand = 1)打印(工具栏.toolitems)def on_key_press(事件):print(您按下了{}".format(event.key))key_press_handler(事件，画布，工具栏)canvas.mpl_connect("key_press_event", on_key_press)定义_退出():root.quit()#停止mainlooproot.destroy() # 这在 Windows 上是必要的，以防止# 致命的 Python 错误:PyEval_RestoreThread: NULL tstatebutton = tkinter.Button(master = root，text ="Quit"，command = _quit)button.pack(side=tkinter.BOTTOM)tkinter.mainloop()# 如果你把root.destroy()放在这里，如果窗口是会导致错误#用窗口管理器关闭.

I am using matplotlib with tk/tkinter, following the "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()

According to Tool Manager

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

should work, but it does not.

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

As one can see in the screenshot from vs-code, FigureCanvasTkAgg does not have attribute 'manager':

How to remove the toolbar button?

解决方案

It seems Canvas and NavigationToolbar2Tk embedded in tkinter have different constructions and differen functions. Standard matplotlib window uses Qt as backend.

---

toolbar = NavigationToolbar2Tk(self._canvas, frame)

To list information about buttons

print(toolbar.toolitems)    

To remove Pan button - it is 4th button

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

To assign new function to existing button - ie. Home

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

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

To add new button

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

The same way you could add other tkinter widgets - Label, Entry, etc.

---

EDIT: as ImportanceOfBeingErnest mentioned in comment it can be done more elegant way.

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

---

Full working example

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.

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