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Qt for Python UsingQtProperties: Difference between revisions
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[[Category:LanguageBindings::PySide]]<br />[[Category:Snippets]] | |||
'''English''' [[:Using_Qt_Properties_in_PySide_Korean|한국어]] | |||
PySide provides a | = Using Qt Properties in PySide = | ||
PySide provides a <code&gt;Property&lt;/code&gt; function which allows for declaring properties that simultaneously behave both as Qt and Python properties, and have their setters and getters defined as Python functions. | |||
A short example illustrating defining and accessing a Qt property from Python is given below: | A short example illustrating defining and accessing a Qt property from Python is given below: | ||
The complete specification for | <code><br />from PySide.QtCore import QObject, Property | ||
class MyObject(QObject):<br /> def ''init''(self,startval=42):<br /> QObject.''init''(self)<br /> self.ppval = startval | |||
def readPP(self):<br /> return self.ppval | |||
def setPP(self,val):<br /> self.ppval = val | |||
pp = Property(int, readPP, setPP) | |||
obj = MyObject()<br />obj.pp = 47<br />print (obj.pp)<br /></code> | |||
The complete specification for PySide's property system is given in "PSEP 103&quot;:http://web.archive.org/web/20120423210319/http://www.pyside.org/docs/pseps/psep-0103.html. | |||
== Properties in QML expressions == | |||
If you are using properties of your objects in QML expressions, QML requires the property to be NOTIFYable. This can be done using a simple signal: | |||
<code><br />class Person(QtCore.QObject):<br /> def ''init''(self, name):<br /> QtCore.QObject.''init''(self)<br /> self._person_name = name | |||
def _name(self):<br /> return self._person_name | |||
&#64;QtCore.Signal<br /> def name_changed(self): pass | |||
name = QtCore.Property(unicode, _name, notify=name_changed)<br /></code> | |||
Revision as of 09:03, 24 February 2015
English 한국어
Using Qt Properties in PySide
PySide provides a <code>Property</code> function which allows for declaring properties that simultaneously behave both as Qt and Python properties, and have their setters and getters defined as Python functions.
A short example illustrating defining and accessing a Qt property from Python is given below:
<br />from PySide.QtCore import QObject, Property
class MyObject(QObject):<br /> def ''init''(self,startval=42):<br /> QObject.''init''(self)<br /> self.ppval = startval
def readPP(self):<br /> return self.ppval
def setPP(self,val):<br /> self.ppval = val
pp = Property(int, readPP, setPP)
obj = MyObject()<br />obj.pp = 47<br />print (obj.pp)<br />
The complete specification for PySide's property system is given in "PSEP 103":http://web.archive.org/web/20120423210319/http://www.pyside.org/docs/pseps/psep-0103.html.
Properties in QML expressions
If you are using properties of your objects in QML expressions, QML requires the property to be NOTIFYable. This can be done using a simple signal:
<br />class Person(QtCore.QObject):<br /> def ''init''(self, name):<br /> QtCore.QObject.''init''(self)<br /> self._person_name = name
def _name(self):<br /> return self._person_name
&#64;QtCore.Signal<br /> def name_changed(self): pass
name = QtCore.Property(unicode, _name, notify=name_changed)<br />