wxPython用于让用户选择一个屏幕区域，然后调用pyautogui的screenshot进行截图。保持半秒(理想状态)截一张tmp图片比较上一张是否发生了变化，如果有变化，保存。
本例：macos10.14、python3.7.2、wxPython4.1.1、PyAutoGUI0.9.53、Pillow7.2.0
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import math import os import platform import pyautogui # PyAutoGUI0.9.53 import threading import time import wx # wxPython4.1.1 from PIL import Image # Pillow7.2.0 class Shotor: def __init__(self): self.desktop = self.get_desktop() self.last_screenshot_path = None def get_desktop(self): # 保存到桌面 if(platform.system() == 'Windows'): import winreg key = winreg.OpenKey(winreg.HKEY_CURRENT_USER, r'Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders') return winreg.QueryValueEx(key, "Desktop")[0] else: return os.path.join(os.path.expanduser('~'), "Desktop") def pixel_equal(self, image1, image2, x, y): # 比较像素 piex1 = image1.load()[x, y] # 取像素点 piex2 = image2.load()[x, y] threshold = 10 # 阈值 if abs(piex1[0] - piex2[0]) < threshold and \ abs(piex1[1] - piex2[1]) < threshold and \ abs(piex1[2] - piex2[2]) < threshold: # 如果像素点的RGB值小于阈值，就认为像素点是一样的 return True else: return False def compare(self, image1, image2): # 根据像素比较图片 count = 0 # 全部像素点个数 same_count = 0 # 相同像素点个数 diff_count = 0 # 不同像素点个数 step = 2 # 视情况优化 for i in range(image1.size[0], step=step): for j in range(image1.size[1], step=step): count += 1 if self.pixel_equal(image1, image2, i, j): same_count += 1 else: diff_count += 1 same_rate = same_count / count # 相同像素占比 diff_rate = diff_count / count # 不同像素占比 return same_rate, diff_rate def shot(self, x, y, w, h): thread = threading.Thread(target=self.shotThread, args=[x, y, w, h]) thread.setDaemon(True) thread.start() # 子线程去截图。否则阻塞UI def shotThread(self, x, y, w, h): image = pyautogui.screenshot( region=(x*2, y*2, w*2, h*2)) # 为什么截图定位偏移为1/2 ？ tmp_path = os.path.join(self.desktop, "diffshot_tmp.png") image.save(tmp_path) if self.last_screenshot_path: image1 = Image.open(tmp_path) image2 = Image.open(self.last_screenshot_path) same_rate, diff_rate = self.compare(image1, image2) if same_rate < 1: # 如果图片比较有新内容，就保存此截图 self.saveShot(image) else: self.saveShot(image) time.sleep(0.5) self.shot(x, y, w, h) def saveShot(self, image): screenshot_path = os.path.join( self.desktop, "diffshot_{}.png".format(time.time())) image.save(screenshot_path) self.last_screenshot_path = screenshot_path print("截图1张") class EventManager: def __init__(self): self.shot_x = 0 self.shot_y = 0 self.shot_w = 0 self.shot_h = 0 self.down_x = 0 self.down_y = 0 self.isDrawing = False _app = wx.App() # 首先进行初始化操作 ws = wx.DisplaySize() self.width = ws[0] self.height = ws[1] _frame = wx.Frame(None, -1, "比较截图") _frame.ShowFullScreen(True) _frame.SetTransparent(200) _frame.SetBackgroundStyle(wx.BG_STYLE_CUSTOM) _frame.Bind(wx.EVT_MOUSE_EVENTS, self.mouseEvent) # 监听鼠标事件 _bmp = wx.Bitmap(self.width, self.height) _staticBmp = wx.StaticBitmap(_frame, wx.ID_ANY, _bmp) self.buffer_bmp = _bmp self.staticBmp = _staticBmp self.frame = _frame self.app = _app self.drawButtons() def exitEvent(self, event): self.frame.Destroy() def showFullRect(self): self.frame.Show() self.app.MainLoop() def mouseEvent(self, event): if event.LeftDown(): pos = event.GetPosition() self.down_x = pos[0] self.down_y = pos[1] self.drawButtons() # 重绘按钮，会清除ClientDC绘制的图形 self.isDrawing = True elif event.LeftUp(): self.drawRect(event, True) self.isDrawing = False elif event.Dragging(): if self.isDrawing: self.drawRect(event) def drawButtons(self): _button_exit = wx.Button(self.frame, -1, "退出", pos=(50, self.height - 90)) _button_exit.Bind(wx.EVT_BUTTON, self.exitEvent) self.button_shot = wx.Button( self.frame, -1, "截图", pos=(50 + 100, self.height - 90)) self.button_shot.Bind(wx.EVT_BUTTON, self.shotEvent) def drawRect(self, event, isUp=False): pos = event.GetPosition() up_x = pos[0] up_y = pos[1] x = self.down_x y = self.height-self.down_y w = up_x - self.down_x h = self.down_y - up_y paint = wx.ClientDC(self.staticBmp) # 如果ClientDC使用Clear方法，会导致按钮也清除 paint.DrawRectangle(x, y, w, h) # self.frame.SetTransparent(60) # 提高透明度 if isUp: x = min(self.down_x, up_x) # pyautogui截图从左上角开始 y = min(self.down_y, up_y) w = math.fabs(self.down_x - up_x) h = math.fabs(self.down_y - up_y) self.shot_x = x self.shot_y = y self.shot_w = w self.shot_h = h def shotEvent(self, event): self.button_shot.Unbind(wx.EVT_BUTTON) self.frame.Unbind(wx.EVT_MOUSE_EVENTS) Shotor().shot(self.shot_x, self.shot_y, self.shot_w, self.shot_h) if "__main__" == __name__: EventManager().showFullRect() |
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本文由崔维友 威格灵 cuiweiyou vigiles cuiweiyou 原创，转载请注明出处：http://www.gaohaiyan.com/3164.html
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