Python实现简易QQ截图功能：基于PIL与wxPython的开发指南

from PIL import ImageGrab
import time

# 截取图像
def catch_area(left, top, right, bottom):
    return ImageGrab.grab((left, top, right, bottom))
# 测试函数
def test():
    first = time.time()
    catch_area(101,101,200,300).save('D:/1.jpg')
    print(time.time() - first)

test()

import wx
from PIL import ImageGrab

class ScreenShot(wx.Frame):
    left,right,top,bottom = 0,0,0,0
    img = None

    def __init__(self, parent):
        wx.Frame.__init__(self, parent,
            style = wx.MAXIMIZE # 全屏显示
        )
        # 设置背景色
        self.SetBackgroundColour((255,255,255))
        # 设置透明度
        self.SetTransparent(30)
        # 注册事件
        self.Bind(wx.EVT_LEFT_DOWN, self.OnDown, self)
        self.Bind(wx.EVT_LEFT_UP, self.OnUp, self)
        # 显示button
        self.Show(True)

    def OnDown(self, event):
        pos = event.GetPosition()
        self.top = pos.y
        self.left = pos.x
        
    def OnUp(self, event):
        pos = event.GetPosition()
        self.bottom = pos.y
        self.right = pos.x
        
        print(self.left, self.top, self.right, self.bottom)
        self.img = self.catch_area(
            self.left, self.top, self.right, self.bottom)
        # 截图完毕后关闭button
        self.Close(False)

    def catch_area(self, left, top, right, bottom):
        return ImageGrab.grab((left, top, right, bottom))
        
# 测试用例
# app = wx.App(False)
# frame = ScreenShot(None)
# app.MainLoop()

import wx
import ScreenShot as SS

class MainWindow(wx.Frame):
    def __init__(self, parent):
        # 视窗属性
        wx.Frame.__init__(self, parent,
            size = (1000, 200),         # 视窗大小
            style = wx.CLIP_CHILDREN,   # 视窗样式，这个样式可以去掉原生的标题栏
            #pos = (200, 200)           # 视窗位置，下面设置居中了
        )
        # 创建位于窗口的底部的状态栏
        self.CreateStatusBar()
        # 布局
        self.root = wx.BoxSizer(wx.VERTICAL)
        self.menu = wx.BoxSizer(wx.HORIZONTAL)
        self.body = wx.BoxSizer(wx.VERTICAL)
        self.menuText = [u"开始截图", u"退出"]
        self.menubuttons = []
        for i in range(0, 2):
            # 新建按键
            self.menubuttons.append(wx.Button(self, -1, self.menuText[i]))
            self.menu.Add(self.menubuttons[i], 1, wx.SHAPED)
        # 新建只读文本框（预留）
        self.control = wx.TextCtrl(self, style = wx.TE_READONLY)
        self.body.Add(self.control, 1, wx.GROW)
        self.root.Add(self.menu, 1, wx.GROW)
        self.root.Add(self.body, 4, wx.EXPAND)
        # 激活布局
        self.SetSizer(self.root)
        self.SetAutoLayout(True)
        # self.root.Fit(self) # 适应内部大小
        # 事件注册
        self.Bind(wx.EVT_BUTTON, self.OnStart, self.menubuttons[0])
        self.Bind(wx.EVT_BUTTON, self.OnExit, self.menubuttons[1])
        # 热键注册
        self.hotkey = wx.NewIdRef()  # 创建id
        self.RegisterHotKey(self.hotkey, wx.MOD_CONTROL, ord('Q'))  # 注册热键（按ctrl+Q键响应）
        self.Bind(wx.EVT_HOTKEY, self.OnKeyBoard, id=self.hotkey)   # 绑定热键事件
        # 窗口居中
        self.Center()
        # 显示视窗
        self.Show(True)

    # 开始截图
    def OnStart(self, event):
        SS.ScreenShot(self)

    # 关闭整个应用
    def OnExit(self, event):
        self.Destroy()    

    # 热键事件
    def OnKeyBoard(self, event):
        SS.ScreenShot(self)

app = wx.App(False)
frame = MainWindow(None)
app.MainLoop()