canvas tkinter中的Delete方法

canvas.delete(object_id)

import tkinter as tk

def delete_rectangle():
    # 假设 rect_id 是矩形的ID
    canvas.delete(rect_id)
    print("矩形已删除")

root = tk.Tk()
canvas = tk.Canvas(root, width=300, height=200, bg='white')
canvas.pack()

# 创建一个矩形，返回其ID
rect_id = canvas.create_rectangle(50, 50, 150, 100, fill='blue')

# 创建一个按钮来删除矩形
delete_button = tk.Button(root, text="删除矩形", command=delete_rectangle)
delete_button.pack()

root.mainloop()

# 创建多个对象
rect_id1 = canvas.create_rectangle(50, 50, 150, 100, fill='blue')
rect_id2 = canvas.create_rectangle(200, 50, 300, 100, fill='red')
line_id = canvas.create_line(50, 150, 300, 150, fill='green')

# 删除多个对象
canvas.delete(rect_id1, rect_id2, line_id)

canvas.delete("all")

import tkinter as tk

def delete_selected():
    selected = [obj for obj in ["rect", "line", "oval"] if var_dict[obj].get()]
    for obj in selected:
        canvas.delete(eval(f"{obj}_id"))

root = tk.Tk()
canvas = tk.Canvas(root, width=400, height=300, bg='white')
canvas.pack()

var_dict = {}
objects = ["rect", "line", "oval"]

for obj in objects:
    var_dict[obj] = tk.BooleanVar()
    tk.Checkbutton(root, text=f"删除{obj}", variable=var_dict[obj]).pack()

# 创建对象
rect_id = canvas.create_rectangle(50, 50, 150, 100, fill='blue')
line_id = canvas.create_line(50, 200, 350, 200, fill='green')
oval_id = canvas.create_oval(200, 50, 300, 150, fill='red')

# 存储ID
globals()[f"{objects[0]}_id"] = rect_id
globals()[f"{objects[1]}_id"] = line_id
globals()[f"{objects[2]}_id"] = oval_id

delete_button = tk.Button(root, text="删除选中对象", command=delete_selected)
delete_button.pack()

root.mainloop()