python screen-print不捕获所有Windows应用程序的下拉菜单

Question

我已经测试了三种不同的方法来捕获包含下拉菜单的Windows屏幕。这两种方法都没有捕获下拉菜单。有人可以向我解释如何实现这一目标吗？

要捕获的图像：

捕获所有三种方法后得到的图像

但是，例如Outlook正确捕获下拉列表：

捕获脚本：

import numpy as np
from PIL import ImageGrab
import cv2
import os
import time
import datetime
from mss.windows import MSS as mss
import win32api
import win32gui
import ctypes

user32 = ctypes.windll.user32
dtwidth = user32.GetSystemMetrics(0)
dtheight = user32.GetSystemMetrics(1)

inputkey = {}
inpkeystat = False
mouse_state = 0

CLK_EMPTY = 0
CLK_OK = 1

env = os.environ
try:
    usrenv = env['TEMP']
except:
    usrenv = env['TMP']

BASEDIR = os.path.join(usrenv, './')

def get_click():
    global inputkey
    global mouse_state
    global inpkeystat

    (x, y) = (0, 0)
    wintext = ""
    retcode = CLK_EMPTY

    if inpkeystat == False:
        mouse_state = win32api.GetKeyState(0x01)
        inpkeystat = True

    mouseleft = win32api.GetKeyState(0x01)
    if mouseleft != mouse_state:  # Button state changed
        mouse_state = mouseleft
        if mouseleft < 0:
            # Left Button Pressed
            x, y = win32api.GetCursorPos()
            hwnd = win32gui.WindowFromPoint((x, y))
            wintext = win32gui.GetWindowText(hwnd)
            inpkeystat = False
            retcode = CLK_OK

    return retcode, wintext, (x, y)


logfile = os.path.join(BASEDIR, "scrnprintlog.txt")
date = datetime.datetime.now().strftime("%d-%m-%Y %I:%M%p")
printseq = 1

with open(logfile, "a") as myfile:
    myfile.write("-------------------------------------------
")
    myfile.write(" Log screenprint test
")
    myfile.write(date)
    myfile.write("
-------------------------------------------
")

print "-------------------------------------------"
print " Click mouse on screen to start capture"
print "-------------------------------------------"

while (True):
    clkevent, clkwin, (clkx, clky) = get_click()
    if clkevent == CLK_OK: break

while(True):
    (ax1, ay1, ax2, ay2) = (0, 0, dtwidth, dtheight)

    time.sleep(2)
    #method 1
    try:
        winImage = ImageGrab.grab((ax1, ay1, ax2, ay2))
        imgFile = 'scr-' + str(printseq) + '-pre-imggrab.png'
        imgSave = os.path.join(BASEDIR, imgFile)
        winImage.save(imgSave)

        date = datetime.datetime.now().strftime("%d-%m-%Y %I:%M%p")
        logstring = date + ': ' + imgFile + "
"
        with open(logfile, "a") as myfile:
            myfile.write(logstring)
    except:
        pass

    #method 2
    try:
        sct = mss()
        imgFile = 'scr-' + str(printseq) + '-pre-shot.png'
        imgSave = os.path.join(BASEDIR, imgFile)
        sct.shot(mon=-1, output=imgSave)
        date = datetime.datetime.now().strftime("%d-%m-%Y %I:%M%p")
        logstring = date + ': ' + imgFile + "
"
        with open(logfile, "a") as myfile:
            myfile.write(logstring)
    except:
        pass

    #method 3
    try:
        printscreen_pil =  ImageGrab.grab()
        printscreen_numpy =   np.array(printscreen_pil.getdata(),dtype='uint8')
                        .reshape((printscreen_pil.size[1],printscreen_pil.size[0],3))
        imgFile = 'scr-' + str(printseq) + '-pre-pil.png'
        imgSave = os.path.join(BASEDIR, imgFile)
        cv2.imwrite(imgSave, printscreen_numpy)
        date = datetime.datetime.now().strftime("%d-%m-%Y %I:%M%p")
        logstring = date + ': ' + imgFile + "
"
        with open(logfile, "a") as myfile:
            myfile.write(logstring)
    except:
        pass

    print "-------------------------------------------
"
    print "Click mouse for screen capture
"

    while (True):
        clkevent, clkwin, (clkx, clky) = get_click()
        if clkevent == CLK_OK: break
    print "-------------------------------------------
"

    printseq += 1