如何使用 PyQt 更改光标形状?
问题描述
我有一个简单的应用程序，它运行的进程可能会持续几分钟才能完成.我正在尝试向用户提供它正在处理请求的指示 - 例如将光标更改为沙漏.
I have a simple application that runs a process that can last for several minutes before completing. I am trying to provide an indication to the user that it is processing the request - such as changing the cursor to an hourglass.
但我不能让它正常工作.我所有的尝试都导致错误或无效.而且我似乎错误地调用了光标形状，因为 PyQt4.Qt.WaitCursor 返回模块不包含它的错误.
But I cannot quite get it to work right. All of my attempts have resulted in either an error or had no effect. And I seem to be calling the cursor shapes incorrectly, since PyQt4.Qt.WaitCursor returns an error that the module does not contain it.
向用户指示进程正在运行的正确方法是什么?
What is the correct way to indicate to the user that the process is running?
解决方案
我认为 QApplication.setOverrideCursor 就是你要找的东西:
I think QApplication.setOverrideCursor is what you're looking for:
PyQt5:
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import QApplication
...
QApplication.setOverrideCursor(Qt.WaitCursor)
# do lengthy process
QApplication.restoreOverrideCursor()
PyQt4:
from PyQt4.QtCore import Qt
from PyQt4.QtGui import QApplication
...
QApplication.setOverrideCursor(Qt.WaitCursor)
# do lengthy process
QApplication.restoreOverrideCursor()
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