Question

我使用wxPython获得了（显然）跨平台的截屏功能：

def take_screenshot(x=0, y=0, width=None, height=None):
try:
    import wx
except ImportError as e:
    return 'Screenshot could not be taken - wx could not be imported: %s' %(e)
import os, datetime
folder_name = datetime.date.today().strftime('%Y-%m-%d')
file_name = datetime.datetime.now().strftime('%H-%M-%S') + '.png'
directory = os.path.join(os.getcwd(), 'screenshots', folder_name)
make_directory(directory)
filename = os.path.join(directory, file_name)

app = wx.App()
screen = wx.ScreenDC()

size = screen.GetSize()
if width == None:
    width = size[0]
if height == None:
    height = size[1]
bmp = wx.EmptyBitmap(width, height)
mem = wx.MemoryDC(bmp)
mem.Blit(0, 0, width, height, screen, x, y)

del mem
bmp.SaveFile(filename, wx.BITMAP_TYPE_PNG)
return 'Screenshot saved to file: %s' %(filename)

Here is a screenshot I took on Windows 7。这段代码在Linux上运行良好。我正在运行Python 2.7.8和wxPython 3.0.2.0

有没有人见过类似的问题？我做错了吗？

Answer 1

几年前在Stack和wxPython mailing list上讨论过这个问题。那时，没有可靠的跨平台方法来截取用户屏幕的截图。从那以后我没有听说过任何改进。您可以尝试使用Stack链接中提到的PyQt方法，也可以尝试pyscreenshot项目。

Answer 2

wxPython 4及更高版本的更新

import wx

app = wx.App(False)
screen = wx.ScreenDC()

size = screen.GetSize()
width = size.width
height = size.height
bmp = wx.Bitmap(width, height)

# Create a memory DC that will be used for actually taking the screenshot
memDC = wx.MemoryDC()
# Tell the memory DC to use our Bitmap
# all drawing action on the memory DC will go to the Bitmap now
memDC.SelectObject(bmp)
# Blit (in this case copy) the actual screen on the memory DC
memDC.Blit(
    0, 0,
    width, height,
    screen,
    0, 0
)
# Select the Bitmap out of the memory DC by selecting a new bitmap
memDC.SelectObject(wx.NullBitmap)
im = bmp.ConvertToImage()
im.SaveFile('screenshot.png', wx.BITMAP_TYPE_PNG)

wxPython截图Windows

2 个答案: