# -*- encoding=utf-8 -*-import osimport tkinter as tkfrom PIL import Imagefrom PIL import ImageTkleft_mouse_down_x = 0left_mouse_down_y = 0left_mouse_up_x = 0left_mouse_up_y = 0sole_rectangle = Nonedef left_mouse_down(event):  # print('鼠标左键按下')  global left_mouse_down_x, left_mouse_down_y  left_mouse_down_x = event.x  left_mouse_down_y = event.ydef left_mouse_up(event):  # print('鼠标左键释放')  global left_mouse_up_x, left_mouse_up_y  left_mouse_up_x = event.x  left_mouse_up_y = event.y  corp_img(img_path, 'img/one_corp.png', left_mouse_down_x, left_mouse_down_y,       left_mouse_up_x, left_mouse_up_y)def moving_mouse(event):  # print('鼠标左键按下并移动')  global sole_rectangle  global left_mouse_down_x, left_mouse_down_y  moving_mouse_x = event.x  moving_mouse_y = event.y  if sole_rectangle is not None:    canvas.delete(sole_rectangle) # 删除前一个矩形  sole_rectangle = canvas.create_rectangle(left_mouse_down_x, left_mouse_down_y, moving_mouse_x,                       moving_mouse_y, outline='red')def right_mouse_down(event):  # print('鼠标右键按下')  passdef right_mouse_up(event):  # print('鼠标右键释放')  passdef corp_img(source_path, save_path, x_begin, y_begin, x_end, y_end):  if x_begin < x_end:    min_x = x_begin    max_x = x_end  else:    min_x = x_end    max_x = x_begin  if y_begin < y_end:    min_y = y_begin    max_y = y_end  else:    min_y = y_end    max_y = y_begin  save_path = os.path.abspath(save_path)  if os.path.isfile(source_path):    corp_image = Image.open(source_path)    region = corp_image.crop((min_x, min_y, max_x, max_y))    region.save(save_path)    print('裁剪完成,保存于:{}'.format(save_path))  else:    print('未找到文件:{}'.format(source_path))if __name__ == '__main__':  pass  win = tk.Tk()  frame = tk.Frame()  frame.pack()  screenwidth = win.winfo_screenwidth()  screenheight = win.winfo_screenheight()  img_path = 'img/one.png'  # img_path = 'img/bg.jpg'  # img_path = 'img/test.jpg'  # img_path = 'img/pic.gif'  image = Image.open(img_path)  image_x, image_y = image.size  if image_x > screenwidth or image_y > screenheight:    print('The picture size is too big,max should in:{}x{}, your:{}x{}'.format(screenwidth,                                          screenheight,                                          image_x,                                          image_y))  img = ImageTk.PhotoImage(image)  canvas = tk.Canvas(frame, width=image_x, height=image_y, bg='pink')  i = canvas.create_image(0, 0, anchor='nw', image=img)  canvas.pack()  canvas.bind('<Button-1>', left_mouse_down) # 鼠标左键按下  canvas.bind('<ButtonRelease-1>', left_mouse_up) # 鼠标左键释放  canvas.bind('<Button-3>', right_mouse_down) # 鼠标右键按下  canvas.bind('<ButtonRelease-3>', right_mouse_up) # 鼠标右键释放  canvas.bind('<B1-Motion>', moving_mouse) # 鼠标左键按下并移动  win.mainloop()