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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" type="guide" style="task" id="menubutton.py" xml:lang="sv">
<info>
<title type="text">MenuButton</title>
<link type="guide" xref="beginner.py#buttons"/>
<link type="next" xref="toolbar.py"/>
<revision version="0.1" date="2012-08-19" status="draft"/>
<credit type="author copyright">
<name>Tiffany Antopolski</name>
<email its:translate="no">tiffany.antopolski@gmail.com</email>
<years>2012</years>
</credit>
<credit type="author copyright">
<name>Marta Maria Casetti</name>
<email its:translate="no">mmcasetti@gmail.com</email>
<years>2012</years>
</credit>
<desc>En komponent som visar en meny när den klickas på</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>MenuButton</title>
<media type="image" mime="image/png" src="media/menubutton.png"/>
<p>The GtkMenuButton widget is used to display a menu when clicked on. This menu can be provided either as a GtkMenu, or an abstract GMenuModel. The GtkMenuButton widget can hold any valid child widget. That is, it can hold almost any other standard GtkWidget. The most commonly used child is the provided GtkArrow.</p>
<note><p>Du behöver köra GNOME 3.6 för att MenuButton ska fungera.</p></note>
<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
from gi.repository import Gio
import sys
class MyWindow(Gtk.ApplicationWindow):
def __init__(self, app):
Gtk.Window.__init__(self, title="Menubutton Example", application=app)
self.set_default_size(600, 400)
grid = Gtk.Grid()
# a menubutton
menubutton = Gtk.MenuButton()
menubutton.set_size_request(80, 35)
grid.attach(menubutton, 0, 0, 1, 1)
# a menu with two actions
menumodel = Gio.Menu()
menumodel.append("New", "app.new")
menumodel.append("About", "win.about")
# a submenu with one action for the menu
submenu = Gio.Menu()
submenu.append("Quit", "app.quit")
menumodel.append_submenu("Other", submenu)
# the menu is set as the menu of the menubutton
menubutton.set_menu_model(menumodel)
# the action related to the window (about)
about_action = Gio.SimpleAction.new("about", None)
about_action.connect("activate", self.about_callback)
self.add_action(about_action)
self.add(grid)
# callback for "about"
def about_callback(self, action, parameter):
print("You clicked \"About\"")
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)
# the actions related to the application
new_action = Gio.SimpleAction.new("new", None)
new_action.connect("activate", self.new_callback)
self.add_action(new_action)
quit_action = Gio.SimpleAction.new("quit", None)
quit_action.connect("activate", self.quit_callback)
self.add_action(quit_action)
# callback functions for the actions related to the application
def new_callback(self, action, parameter):
print("You clicked \"New\"")
def quit_callback(self, action, parameter):
print("You clicked \"Quit\"")
self.quit()
app = MyApplication()
exit_status = app.run(sys.argv)
sys.exit(exit_status)
</code>
</section>
<section id="methods">
<title>Användbara metoder för en MenuButton-komponent</title>
<p>På rad 33 ansluts signalen <code>"activate"</code> från åtgärden <code>about_action</code> till återanropsfunktionen <code>about_callback()</code> med <code><var>åtgärd</var>.connect(<var>signal</var>, <var>återanropsfunktion</var>)</code>. Se <link xref="signals-callbacks.py"/> för en utförligare förklaring.</p>
<p>The positioning of the menu is determined by the "direction" property of the menu button and the "halign" or "valign" properties of the menu. For example, when the direction is <code>Gtk.ArrowType.DOWN</code> (other option: <code>UP</code>) and the horizontal alignment is <code>Gtk.Align.START</code> (other options: <code>CENTER</code> and <code>END</code>), the menu will be positioned below the button, with the starting edge (depending on the text direction) of the menu aligned with the starting edge of the button. If there is not enough space below the button, the menu is popped up above the button instead. If the alignment would move part of the menu offscreen, it is 'pushed in'.</p>
<p>In the case of vertical alignment, the possible ArrowType directions are <code>LEFT</code> and <code>RIGHT</code> and the vertical alignment is again <code>START</code>, <code>CENTER</code> or <code>END</code>.</p>
<p><code>set_align_widget(alignment)</code> and <code>set_direction(direction)</code> can be used to set these properties.</p>
</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/GtkMenuButton.html">MenuButton</link></p></item>
</list>
</section>
</page>
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