在Matplotlib导航工具栏Python中仅显示像素位置和隐藏像素值

import matplotlib.pyplot as plt
from matplotlib.backends.backend_tkagg import NavigationToolbar2Tk
import tkinter as tk

class CustomToolbar(NavigationToolbar2Tk):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.update()

    def update(self):
        super().update()
        self.message.set_text('Pixel Position: (%.1f, %.1f)' % (self.canvas.figure.bbox.width, self.canvas.figure.bbox.height))

    def mouse_move_event(self, event):
        if event.inaxes:
            x, y = event.xdata, event.ydata
            self.message.set_text('Pixel Position: (%.1f, %.1f)' % (x, y))
        else:
            self.message.set_text('Pixel Position: (None, None)')
        super().mouse_move_event(event)

# 创建一个简单的图形
fig, ax = plt.subplots()
ax.plot([1, 2, 3], [4, 5, 6])

# 创建Tkinter窗口
root = tk.Tk()
canvas = fig.canvas
toolbar = CustomToolbar(canvas, root)
canvas.get_tk_widget().pack(side=tk.TOP, fill=tk.BOTH, expand=1)
toolbar.update()

# 运行Tkinter事件循环
root.mainloop()