在tkinter中清除FigureCanvasTkAgg画布,可以通过以下步骤实现:
import tkinter as tk
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg
root = tk.Tk()
fig = Figure()
canvas = FigureCanvasTkAgg(fig, master=root)
canvas.get_tk_widget().pack()
ax = fig.add_subplot(111)
ax.plot([1, 2, 3, 4], [1, 4, 9, 16])
canvas.draw()
def clear_canvas():
ax.clear()
canvas.draw()
clear_button = tk.Button(root, text="Clear", command=clear_canvas)
clear_button.pack()
完整的示例代码如下:
import tkinter as tk
from matplotlib.figure import Figure
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg
def clear_canvas():
ax.clear()
canvas.draw()
root = tk.Tk()
fig = Figure()
canvas = FigureCanvasTkAgg(fig, master=root)
canvas.get_tk_widget().pack()
ax = fig.add_subplot(111)
ax.plot([1, 2, 3, 4], [1, 4, 9, 16])
canvas.draw()
clear_button = tk.Button(root, text="Clear", command=clear_canvas)
clear_button.pack()
tk.mainloop()
这个例子中,我们使用了tkinter创建了一个窗口,然后在窗口中添加了一个FigureCanvasTkAgg画布,并在画布上绘制了一条简单的曲线。通过点击"Clear"按钮,调用clear_canvas函数可以清除画布上的图形。
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