使用Python编写的spy程序运行时总是意外退出

import sys

from PyQt5.QtWidgets import QApplication, QWidget, QLabel, QTextEdit, QTextBrowser, QHBoxLayout, QVBoxLayout

from PyQt5 import QtCore, QtWidgets, QtWidgets

import win32gui,win32con,win32api

from win32gui import *

from dlx import *



class SpyLabel(QtWidgets.QLabel):

    def __init__(self, parent = None):

        QtWidgets.QLabel.__init__(self, parent)

        self.parent = parent

        self.spying = False

        self.rectanglePen = win32gui.CreatePen(win32con.PS_SOLID, 3, win32api.RGB(255, 0, 0))

        self.prevWindow = None

        self.setCursor(QtCore.Qt.SizeAllCursor)



    def mouseMoveEvent(self, event):

        if self.spying:

            curX, curY = win32gui.GetCursorPos()

            hwnd = win32gui.WindowFromPoint((curX, curY))

   

            #if self.checkWindowValidity(hwnd):

            if IsWindow(hwnd) and IsWindowEnabled(hwnd) and IsWindowVisible(hwnd):

                if self.prevWindow:

                    self.refreshWindow(self.prevWindow)

                self.prevWindow = hwnd

                self.highlightWindow(hwnd)

                self.displayWindowInformation(hwnd)

   

    def mouseReleaseEvent(self, event):

        if self.spying:

            if self.prevWindow:

                self.refreshWindow(self.prevWindow)

            win32gui.ReleaseCapture()

            self.spying = False

    def mousePressEvent(self,event):

        if event.button() == QtCore.Qt.LeftButton:

            self.spying = True

   

    def highlightWindow(self, hwnd):

        left, top, right, bottom = win32gui.GetWindowRect(hwnd)

        windowDc = win32gui.GetWindowDC(hwnd)

        if windowDc:

            prevPen = win32gui.SelectObject(windowDc, self.rectanglePen)

            prevBrush = win32gui.SelectObject(windowDc, win32gui.GetStockObject(win32con.HOLLOW_BRUSH))

   

            win32gui.Rectangle(windowDc, 0, 0, right - left, bottom - top)

            win32gui.SelectObject(windowDc, prevPen)

            win32gui.SelectObject(windowDc, prevBrush)

            win32gui.ReleaseDC(hwnd, windowDc)

   

    def refreshWindow(self, hwnd):

        win32gui.InvalidateRect(hwnd, None, True)

        win32gui.UpdateWindow(hwnd)

        win32gui.RedrawWindow(hwnd,

            None,

            None,  

            win32con.RDW_FRAME|

                win32con.RDW_INVALIDATE|

                win32con.RDW_UPDATENOW|

                win32con.RDW_ALLCHILDREN)

   

    def displayWindowInformation(self, hwnd):

        className = win32gui.GetClassName(hwnd)

        buf_size = 1 + win32gui.SendMessage(hwnd, win32con.WM_GETTEXTLENGTH, 0, 0)

        buffer = win32gui.PyMakeBuffer(buf_size)

        win32gui.SendMessage(hwnd, win32con.WM_GETTEXT, buf_size, buffer)

       

        windowText = buffer[:buf_size]    

        try:

            windowText = unicode(windowText, 'gbk')

        except:

            pass

        windowText=win32gui.GetWindowText(hwnd)

        message = ['Handle:\t' + str(hwnd),

                   'Class Name:\t' + className,

                   'Window Text:\t' + windowText,

                   ]

        #self.output('\r\n'.join(message))

        print(message)

        self.parent.text_browser.setText('\r\n'.join(message))  # 2



class pyspy(QWidget):

    def __init__(self):

        super(pyspy, self).__init__()

        self.browser_label = SpyLabel(self)

        self.text_browser = QTextBrowser(self)

 

        self.browser_v_layout = QVBoxLayout()

        self.all_h_layout = QHBoxLayout()

 

        self.layout_init()

 

    def layout_init(self):

 

        self.browser_v_layout.addWidget(self.browser_label)

        self.browser_v_layout.addWidget(self.text_browser)

 

        self.all_h_layout.addLayout(self.browser_v_layout)

 

        self.setLayout(self.all_h_layout)

 

if __name__ == '__main__':

    app = QApplication(sys.argv)

    window = pyspy()

    window.setGeometry(1200, 600, 300, 300)

    window.show()

    sys.exit(app.exec_())