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<?xml version="1.0" encoding="utf-8"?>
<page xmlns="http://projectmallard.org/1.0/" xmlns:its="http://www.w3.org/2005/11/its" xmlns:xi="http://www.w3.org/2001/XInclude" xmlns:e="http://projectmallard.org/experimental/" type="guide" style="task" id="label.py" xml:lang="sv">
<info>
<title type="text">Label (Python)</title>
<link type="guide" xref="beginner.py#display-widgets"/>
<link type="seealso" xref="properties.py"/>
<link type="seealso" xref="strings.py"/>
<link type="next" xref="properties.py"/>
<revision version="0.2" date="2012-06-18" status="draft"/>
<credit type="author copyright">
<name>Marta Maria Casetti</name>
<email its:translate="no">mmcasetti@gmail.com</email>
<years>2012</years>
</credit>
<credit type="author">
<name>Sebastian Pölsterl</name>
<email its:translate="no">sebp@k-d-w.org</email>
<years>2012</years>
</credit>
<desc>En komponent som visar en liten till medelstor mängd text</desc>
<mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
<mal:name>Sebastian Rasmussen</mal:name>
<mal:email>sebras@gmail.com</mal:email>
<mal:years>2019</mal:years>
</mal:credit>
<mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
<mal:name>Anders Jonsson</mal:name>
<mal:email>anders.jonsson@norsjovallen.se</mal:email>
<mal:years>2021</mal:years>
</mal:credit>
</info>
<title>Label</title>
<media type="image" mime="image/png" src="media/label.png"/>
<p>En enkel etikett</p>
<links type="section"/>
<section id="code">
<title>Kod som använts för att generera detta exempel</title>
<code mime="text/x-python" style="numbered">from gi.repository import Gtk
import sys
class MyWindow(Gtk.ApplicationWindow):
# konstruktor för ett Gtk.ApplicationWindow
def __init__(self, app):
Gtk.Window.__init__(self, title="Välkommen till GNOME", application=app)
self.set_default_size(200, 100)
# skapa en etikett
label = Gtk.Label()
# ställ in etikettens text
label.set_text("Hej GNOME!")
# lägg till etiketten till fönstret
self.add(label)
class MyApplication(Gtk.Application):
def __init__(self):
Gtk.Application.__init__(self)
def do_activate(self):
win = MyWindow(self)
win.show_all()
def do_startup(self):
Gtk.Application.do_startup(self)
app = MyApplication()
exit_status = app.run(sys.argv)
sys.exit(exit_status)
</code>
<p>Another way to obtain what we have in the example is to create the label as an instance of another class and add it to the instance of <code>MyWindow</code> in the <code>do_activate(self)</code> method:</p>
<note>
<p>The highlighted lines indicate code that is different from the previous snippet.</p>
</note>
<code mime="text/x-python">
# en klass för att definiera ett fönster
class MyWindow(Gtk.ApplicationWindow):
def __init__(self, app):
Gtk.Window.__init__(self, title="Välkommen till GNOME", application=app)
self.set_default_size(200, 100)
# en klass för att definiera en etikett
<e:hi>
class MyLabel(Gtk.Label):
def __init__(self):
Gtk.Label.__init__(self)
self.set_text("Hej GNOME!")
</e:hi>
class MyApplication(Gtk.Application):
def __init__(self):
Gtk.Application.__init__(self)
def do_activate(self):
# skapa en instans av MyWindow
win = MyWindow(self)
# skapa en instans av MyLabel
<e:hi>
label = MyLabel()
</e:hi>
# och lägg till den till fönstret
<e:hi>
win.add(label)
</e:hi>
# visa fönstret och allt som finns i det
win.show_all()</code>
</section>
<section id="methods">
<title>Användbara metoder för en Label-komponent</title>
<note style="tip">
<p>An explanation of how to work with strings in GTK+ can be found in <link xref="strings.py"/>.</p>
</note>
<list>
<item><p><code>set_line_wrap(True)</code> breaks lines if the text of the label exceeds the size of the widget.</p></item>
<item><p><code>set_justify(Gtk.Justification.LEFT)</code> (or <code>Gtk.Justification.RIGHT, Gtk.Justification.CENTER, Gtk.Justification.FILL</code>) sets the alignment of the lines in the text of the label relative to each other. The method has no effect on a single-line label.</p></item>
<item><p>For decorated text we can use <code>set_markup("text")</code>, where <code>"text"</code> is a text in the <link href="http://developer.gnome.org/pango/stable/PangoMarkupFormat.html">Pango Markup Language</link>. An example:</p>
<code mime="text/x-python"><![CDATA[
label.set_markup("Text can be <small>small</small>, <big>big</big>, "
"<b>bold</b>, <i>italic</i> and even point to somewhere "
"on the <a href=\"http://www.gtk.org\" "
"title=\"Click to find out more\">internet</a>.")]]></code>
</item>
</list>
</section>
<section id="references">
<title>API-referenser</title>
<p>I detta exempel använde vi följande:</p>
<list>
<item><p><link href="http://developer.gnome.org/gtk3/unstable/GtkLabel.html">GtkLabel</link></p></item>
<item><p><link href="http://developer.gnome.org/gtk3/unstable/GtkWindow.html">GtkWindow</link></p></item>
</list>
</section>
</page>
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