特性 ¶

详细描述 ¶

The Property function lets you declare properties that behave both as Qt and Python properties, and have their setters and getters defined as Python functions.

Here is an example that illustrates how to use this function:

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from PySide2.QtCore import QObject, Property

class MyObject(QObject):

def __init__(self,startval=42):

QObject.__init__(self) self.ppval = startval

def readPP(self):

return self.ppval

def setPP(self,val):

self.ppval = val

pp = Property(int, readPP, setPP)

obj = MyObject() obj.pp = 47 print(obj.pp)

Properties in QML expressions ¶

If you are using properties of your objects in QML expressions, QML requires that the property changes are notified. Here is an example illustrating how to do this:

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from PySide2.QtCore import QObject, Signal, Property

class Person(QObject):

def __init__(self, name):

QObject.__init__(self) self._person_name = name

def _name(self):

return self._person_name

@Signal def name_changed(self):

pass

name = Property(str, _name, notify=name_changed)