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<page xmlns="http://projectmallard.org/1.0/" xmlns:its="http://www.w3.org/2005/11/its" xmlns:e="http://projectmallard.org/experimental/" type="guide" style="task" id="properties.py" xml:lang="ca">
<info>
<title type="text">Properties (Python)</title>
<link type="guide" xref="beginner.py#theory"/>
<link type="next" xref="grid.py"/>
<revision version="0.1" date="2012-06-24" status="draft"/>
<desc>An explanation of properties, getters and setters.</desc>
<credit type="author copyright">
<name>Sebastian Pölsterl</name>
<email its:translate="no">sebp@k-d-w.org</email>
<years>2011</years>
</credit>
<credit type="editor">
<name>Marta Maria Casetti</name>
<email its:translate="no">mmcasetti@gmail.com</email>
<years>2012</years>
</credit>
</info>
<title>Properties</title>
<links type="section"/>
<section id="overview">
<title>Overview</title>
<p><em>Properties</em> describe the configuration and state of widgets. Each
widget has its own particular set of properties. For example, a widget such as
a button has the property <code>label</code> which contains the text of the
widget. You can specify the name and value of any number of properties as
keyword arguments when creating an instance of a widget. For example, to
create a label with the text “Hello World”, an angle of 25 degrees, and
aligned to the right, you can use:</p>
<code>
label = Gtk.Label(label="Hello World", angle=25, halign=Gtk.Align.END)</code>
<p>Alternatively, you can define these properties separately by using the method associated with it.</p>
<code>
label = Gtk.Label()
label.set_label("Hello World")
label.set_angle(25)
label.set_halign(Gtk.Align.END)</code>
<p>Once you have created such a label, you can get the text of the label with <code>label.get_label()</code>, and analogously for the other properties.</p>
<p>Instead of using getters and setters you can also get and set the properties with <code>get_property(<var>"prop-name"</var>)</code> and <code>set_property(<var>"prop-name"</var>, <var>value</var>)</code>, respectively.</p>
</section>
<section id="references">
<title>References</title>
<p><link href="http://python-gtk-3-tutorial.readthedocs.org/en/latest/basics.html">Basics - Properties</link> in Python GTK+ 3 Tutorial</p>
</section>
</page>
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