PROSAGA码农传奇-python-自定义PyQt信号从未被QSignalTransition子类接收

自定义PyQt信号从未被QSignalTransition子类接收

作者: 誓言
发布时间: 2024-01-18 01:36:57 (3月前)
转自：

<div class =“post-text”itemprop =“text”>
  <P>
    该
    <a href="https://doc.qt.io/qt-5/qstate.html#assignProperty" rel="nofollow noreferrer">
       <code>
        assignProperty()
      </code>
    </A>
     方法需要一个Q_PROPERTY，在PySide / PySide2的情况下等于Property（与python本身提供的属性不同），在PyQt4 / PyQt5的情况下你必须使用
    <a href="http://pyqt.sourceforge.net/Docs/PyQt5/qt_properties.html#PyQt5.QtCore.pyqtProperty" rel="nofollow noreferrer">
      pyqtProperty
    </A>
    ，这是错误的原因所以解决方案是替换为以下：
  </p>
   <pre>
    <code>
      from PyQt5.QtCore import QObject, pyqtSignal, QSignalTransition, QCoreApplication, QStateMachine, QState, QFinalState, pyqtProperty

class Factorial(QObject):
    xChanged = pyqtSignal(int)
    def __init__(self):
        super(Factorial, self).__init__()
        self.xval = -1
        self.facval = 1

def getX(self):
        return self.xval

def setX(self, x):
        if self.xval == x:
            return
        self.xval = x
        self.xChanged.emit(x)

x = pyqtProperty(int, getX, setX) # <---

def getFact(self):
        return self.facval

def setFact(self, fac):
        self.facval = fac

fac = pyqtProperty(int, getFact, setFact) # <---

# ...

</code>
  </pre>
</DIV>