Python实现用鼠标截图功能
import tkinter
import tkinter.filedialog
import os
from PIL import ImageGrab
from time import sleep
#创建tkinter主窗口
root = tkinter.Tk()
#指定主窗口位置与大小
root.geometry('100x40+400+300')
#不允许改变窗口大小
root.resizable(False, False)
class MyCapture:
def __init__(self, png):
#变量X和Y用来记录鼠标左键按下的位置
self.X = tkinter.IntVar(value=0)
self.Y = tkinter.IntVar(value=0)
#屏幕尺寸
screenWidth = root.winfo_screenwidth()
screenHeight = root.winfo_screenheight()
#创建顶级组件容器
self.top = tkinter.Toplevel(
root, width=screenWidth, height=screenHeight)
#不显示最大化、最小化按钮
self.top.overrideredirect(True)
self.canvas = tkinter.Canvas(
self.top, bg='white', width=screenWidth, height=screenHeight)
#显示全屏截图,在全屏截图上进行区域截图
self.image = tkinter.PhotoImage(file=png)
self.canvas.create_image(
screenWidth//2, screenHeight//2, image=self.image)
#鼠标左键按下的位置
def onLeftButtonDown(event):
self.X.set(event.x)
self.Y.set(event.y)
#开始截图
self.sel = True
self.canvas.bind('<Button-1>', onLeftButtonDown)
#鼠标左键移动,显示选取的区域
def onLeftButtonMove(event):
if not self.sel:
return
global lastDraw
try:
#删除刚画完的图形,要不然鼠标移动的时候是黑乎乎的一片矩形
self.canvas.delete(lastDraw)
except Exception as e:
pass
lastDraw = self.canvas.create_rectangle(
self.X.get(), self.Y.get(), event.x, event.y, outline='black')
self.canvas.bind('<B1-Motion>', onLeftButtonMove)
#获取鼠标左键抬起的位置,保存区域截图
def onLeftButtonUp(event):
self.sel = False
try:
self.canvas.delete(lastDraw)
except Exception as e:
pass
sleep(0.1)
#考虑鼠标左键从右下方按下而从左上方抬起的截图
left, right = sorted([self.X.get(), event.x])
top, bottom = sorted([self.Y.get(), event.y])
pic = ImageGrab.grab((left+1, top+1, right, bottom))
#弹出保存截图对话框
fileName = tkinter.filedialog.asksaveasfilename(
title='保存截图', filetypes=[('JPG files', '*.jpg')])
if fileName:
pic.save(fileName+'.jpg')
#关闭当前窗口
self.top.destroy()
self.canvas.bind('<ButtonRelease-1>', onLeftButtonUp)
self.canvas.pack(fill=tkinter.BOTH, expand=tkinter.YES)
#开始截图
def buttonCaptureClick():
#最小化主窗口
root.state('icon')
sleep(0.2)
filename = 'temp.png'
im = ImageGrab.grab()
im.save(filename)
im.close()
#显示全屏幕截图
w = MyCapture(filename)
buttonCapture.wait_window(w.top)
#截图结束,恢复主窗口,并删除临时的全屏幕截图文件
root.state('normal')
os.remove(filename)
buttonCapture = tkinter.Button(root, text='截图', command=buttonCaptureClick)
buttonCapture.place(x=10, y=10, width=80, height=20)
#启动消息主循环
root.mainloop()