如何使用 pyautogui 检查是否按住了特定的组合键和鼠标左键

Question

我想使用鼠标和键盘的特定组合来捕获屏幕的一部分。

我

获得了捕获屏幕的功能，我所需要的只是某种方式来对鼠标和键盘的组合做出反应，例如：Ctrl + Shift +鼠标在特定区域拖动。

对于鼠标拖动到特定区域，我需要执行以下操作，检查是否按住 Ctrl+Shift，然后在单击鼠标后立即记录鼠标坐标(用户开始单击并拖动该区域(和释放单击时的坐标(用户完成选择区域(...我需要这四个坐标来进行屏幕捕获功能

下面是一些相关的不完整代码。我只需要 on_press(( 的函数来实现我的目标

from pynput.keyboard import Key, Listener
from pynput.mouse import Listener
def on_press(key):
    #Here i want to do the listening stuff and recording the mousepositions
def on_release(key):
   if key == Key.ctrl_l:
      if key == Key.shift:
         return False
   if key == Key.shift:
      if key == Key.ctrl_l:
         return False
with Listener(
        on_press=on_press,
        on_release=on_release) as listener:
    listener.join()
#x is the list which contains the relevant recorded coordinates
x=[top_left_x,top_left_y,bottom_right_x,bottom_right_y]
screen = grab_screen(region=(x[0],x[1],x[2],x[3]))
cv2.imshow('window',screen)

请帮帮我...如果您对抓取屏幕功能代码感兴趣在这里：

import cv2
import numpy as np
import win32gui, win32ui, win32con, win32api
def grab_screen(region=None):
    hwin = win32gui.GetDesktopWindow()
    if region:
            left,top,x2,y2 = region
            width = x2 - left + 1
            height = y2 - top + 1
    else:
        width = win32api.GetSystemMetrics(win32con.SM_CXVIRTUALSCREEN)
        height = win32api.GetSystemMetrics(win32con.SM_CYVIRTUALSCREEN)
        left = win32api.GetSystemMetrics(win32con.SM_XVIRTUALSCREEN)
        top = win32api.GetSystemMetrics(win32con.SM_YVIRTUALSCREEN)
    hwindc = win32gui.GetWindowDC(hwin)
    srcdc = win32ui.CreateDCFromHandle(hwindc)
    memdc = srcdc.CreateCompatibleDC()
    bmp = win32ui.CreateBitmap()
    bmp.CreateCompatibleBitmap(srcdc, width, height)
    memdc.SelectObject(bmp)
    memdc.BitBlt((0, 0), (width, height), srcdc, (left, top), win32con.SRCCOPY)
    signedIntsArray = bmp.GetBitmapBits(True)
    img = np.fromstring(signedIntsArray, dtype='uint8')
    img.shape = (height,width,4)
    srcdc.DeleteDC()
    memdc.DeleteDC()
    win32gui.ReleaseDC(hwin, hwindc)
    win32gui.DeleteObject(bmp.GetHandle())
    return cv2.cvtColor(img, cv2.COLOR_BGRA2RGB)

Answer 1

这应该会有所帮助。COMBINATION列表是组合中的键列表。

from pynput import keyboard
# The key combination to check
COMBINATION = {keyboard.Key.shift, keyboard.Key.ctrl, keyboard.Key.alt, keyboard.KeyCode.from_char('x')}
# The currently active modifiers
current = set()
def on_press(key):
    if key in COMBINATION:
        current.add(key)
        if all(k in current for k in COMBINATION):
            print('All modifiers active!')
    if key == keyboard.Key.esc:
        listener.stop()

def on_release(key):
    try:
        current.remove(key)
    except KeyError:
        pass

with keyboard.Listener(on_press=on_press, on_release=on_release) as listener:
    listener.join()

它可以工作，但如果在侦听器启动之前按下其中一个修饰键，则必须释放并再次按下它才能让程序检测到它。