利用Python实现一个简易的截图工具

# # -*- coding: utf-8 -*-
import tkinter as tk
import pyautogui
import tkinter
from PIL import ImageTk
from PIL import Image
 
root = tk.Tk()
root.wm_attributes('-topmost', 1)
 
root.overrideredirect(True)  # 隐藏窗口的标题栏
# root.attributes("-alpha", 0.3)    # 窗口透明度70 %
root.attributes("-alpha", 0.4)  # 窗口透明度60 %
# root.geometry("300x200+10+10")      # 设置窗口大小与位置
root.geometry("{0}x{1}+0+0".format(root.winfo_screenwidth(), root.winfo_screenheight()))
root.configure(bg="blue")
 
# 当工具条
canvas = tk.Canvas(root)
canvas.configure(width=300)
canvas.configure(height=100)
canvas.configure(bg="yellow")
canvas.configure(highlightthickness=0)  # 高亮厚度
canvas.place(x=(root.winfo_screenwidth() - 500), y=(root.winfo_screenheight() - 300))
canvas.create_text(150, 50, font='Arial -20 bold', text='ESC退出，假装工具条')
 
# 再创建1个Canvas用于圈选
cv = tk.Canvas(root)
x, y = 0, 0
xstart, ystart = 0, 0
 
 
def move(event):
    global x, y, xstart, ystart
    new_x = (event.x - x) + canvas.winfo_x()
    new_y = (event.y - y) + canvas.winfo_y()
    s = "300x200+" + str(new_x) + "+" + str(new_y)
    canvas.place(x=new_x - xstart, y=new_y - ystart)
    print("s = ", s)
    print(root.winfo_x(), root.winfo_y())
    print(event.x, event.y)
 
 
# 鼠标左键按下
def button_1(event):
    global x, y, xstart, ystart
    x, y = event.x, event.y
    xstart, ystart = event.x, event.y
    print("event.x, event.y = ", event.x, event.y)
    xstart, ystart = event.x, event.y
    cv.configure(height=1)
    cv.configure(width=1)
    cv.place(x=event.x, y=event.y)
 
 
# 鼠标左键按下并移动
def b1_Motion(event):
    global x, y
    x, y = event.x, event.y
    print("event.x, event.y = ", event.x, event.y)
    cv.configure(height=event.y - ystart)
    cv.configure(width=event.x - xstart)
 
 
# 鼠标左键松开
def buttonRelease_1(event):
    global x, y, xstart, ystart
    x, y = event.x, event.y
    print("event.x, event.y = ", event.x, event.y)
    Pstart = [0, 0]
    cv.place_forget()
    img = pyautogui.screenshot(region=[xstart, ystart, x - xstart, y - ystart])  # x,y,w,h
    img.save('screenshot.png')
 
 
# 退出
def sys_out(even):
    root.destroy()
    func()
 
# 绑定事件
canvas.bind("<B1-Motion>", move)
# 绑定事件到Esc键，当按下Esc键就会调用sys_out函数，弹出对话框
root.bind('<Escape>', sys_out)
root.bind("<Button-1>", button_1)
root.bind("<B1-Motion>", b1_Motion)
root.bind("<ButtonRelease-1>", buttonRelease_1)
img_png = None
def func():
    root1 = tk.Tk()
    root1.wm_attributes('-topmost', 1)
    img_open = Image.open("screenshot.png")
    global img_png
    img_png = ImageTk.PhotoImage(img_open)
    label_img = tk.Label(root1, image = img_png)
    label_img.pack()
 
root.mainloop()