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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="messagedialog.py" xml:lang="sv">
<info>
<title type="text">MessageDialog (Python)</title>
<link type="guide" xref="beginner.py#windows"/>
<link type="next" xref="gmenu.py"/>
<revision version="0.1" date="2012-06-11" status="draft"/>
<credit type="author copyright">
<name>Marta Maria Casetti</name>
<email its:translate="no">mmcasetti@gmail.com</email>
<years>2012</years>
</credit>
<desc>Ett meddelandefönster</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>MessageDialog</title>
<media type="image" mime="image/png" src="media/messagedialog.png"/>
<p>En meddelandedialog som skriver ut meddelanden i terminalen, beroende på dina val.</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
from gi.repository import Gio
import sys
class MyWindow(Gtk.ApplicationWindow):
# constructor for a window (the parent window) with a label
def __init__(self, app):
Gtk.Window.__init__(self, title="GMenu Example", application=app)
self.set_default_size(400, 200)
label = Gtk.Label()
label.set_text("This application goes boom!")
self.add(label)
# create the message_action (a Gio.SimpleAction) - for the window
message_action = Gio.SimpleAction.new("message", None)
# connect the signal from the action to the function message_cb()
message_action.connect("activate", self.message_cb)
# add the action to the application
app.add_action(message_action)
# callback function for the signal "activate" from the message_action
# in the menu of the parent window
def message_cb(self, action, parameter):
# a Gtk.MessageDialog
messagedialog = Gtk.MessageDialog(parent=self,
flags=Gtk.DialogFlags.MODAL,
type=Gtk.MessageType.WARNING,
buttons=Gtk.ButtonsType.OK_CANCEL,
message_format="This action will cause the universe to stop existing.")
# connect the response (of the button clicked) to the function
# dialog_response()
messagedialog.connect("response", self.dialog_response)
# show the messagedialog
messagedialog.show()
def dialog_response(self, widget, response_id):
# if the button clicked gives response OK (-5)
if response_id == Gtk.ResponseType.OK:
print("*boom*")
# if the button clicked gives response CANCEL (-6)
elif response_id == Gtk.ResponseType.CANCEL:
print("good choice")
# if the messagedialog is destroyed (by pressing ESC)
elif response_id == Gtk.ResponseType.DELETE_EVENT:
print("dialog closed or cancelled")
# finally, destroy the messagedialog
widget.destroy()
class MyApplication(Gtk.Application):
def __init__(self):
Gtk.Application.__init__(self)
def do_activate(self):
win = MyWindow(self)
win.show_all()
def quit_cb(self, action, parameter):
self.quit()
def do_startup(self):
Gtk.Application.do_startup(self)
# create a menu (a Gio.Menu)
menu = Gio.Menu()
# append a menu item with label "Message" and action "app.message"
menu.append("Message", "app.message")
# append a menu item with label "Quit" and action "app.quit"
menu.append("Quit", "app.quit")
# set menu as the menu for the application
self.set_app_menu(menu)
# a new simpleaction - for the application
quit_action = Gio.SimpleAction.new("quit", None)
quit_action.connect("activate", self.quit_cb)
self.add_action(quit_action)
app = MyApplication()
exit_status = app.run(sys.argv)
sys.exit(exit_status)
</code>
</section>
<section id="methods">
<title>Användbara metoder för en MessageDialog-komponent</title>
<p>På rad 18 ansluts signalen <code>"activate"</code> till återanropsfunktionen <code>message_cb()</code> med <code><var>komponent</var>.connect(<var>signal</var>, <var>återanropsfunktion</var>)</code>. Se <link xref="signals-callbacks.py"/> för en utförligare förklaring.</p>
<list>
<item><p>In the constructor of MessageDialog we could set flags as <code>Gtk.DialogFlags.DESTROY_WITH_PARENT</code> (to destroy the messagedialog window when its parent window is destroyed) or as <code>Gtk.DialogFlags.MODAL</code> (no interaction with other windows of the application).</p></item>
<item><p>In the constructor of MessageDialog we could set type as any of <code>Gtk.MessageType.INFO, Gtk.MessageType.WARNING, Gtk.MessageType.QUESTION, Gtk.MessageType.ERROR, Gtk.MessageType.OTHER</code> depending on what type of message we want.</p></item>
<item><p>In the constructor of MessageDialog we could set buttons as any of <code>Gtk.ButtonsType.NONE, Gtk.ButtonsType.OK, Gtk.ButtonsType.CLOSE, Gtk.ButtonsType.CANCEL, Gtk.ButtonsType.YES_NO, Gtk.ButtonsType.OK_CANCEL</code>, or any button using <code>add_button()</code> as in Gtk.Dialog.</p></item>
<item><p>Vi skulle kunna ersätta standardbilden för vår MessageDialog med en annan genom att använda</p>
<code mime="text/x-python">
image = Gtk.Image()
image.set_from_stock(Gtk.STOCK_CAPS_LOCK_WARNING, Gtk.IconSize.DIALOG)
image.show()
messagedialog.set_image(image)</code>
<p>där <code>Gtk.STOCK_CAPS_LOCK_WARNING</code> är någon bild från <link href="http://developer.gnome.org/gtk3/unstable/gtk3-Stock-Items.html">standardobjekten</link>. Vi skulle också kunna ställa in valfri bild som i Image-komponenten, som <code>image.set_from_file("filnamn.png")</code>.</p></item>
<item><p><code>format_secondary_text("något sekundärt meddelande")</code> ställer in ett sekundärt meddelande. Den primära texten blir fet.</p></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/GtkMessageDialog.html">GtkMessageDialog</link></p></item>
<item><p><link href="http://developer.gnome.org/gtk3/unstable/GtkDialog.html">GtkDialog</link></p></item>
<item><p><link href="http://developer.gnome.org/gtk3/unstable/GtkWindow.html">GtkWindow</link></p></item>
<item><p><link href="http://developer.gnome.org/gio/stable/GSimpleAction.html">GSimpleAction</link></p></item>
<item><p><link href="http://developer.gnome.org/gio/unstable/GActionMap.html">GActionMap</link></p></item>
<item><p><link href="http://developer.gnome.org/gio/stable/GMenu.html">GMenu</link></p></item>
<item><p><link href="http://developer.gnome.org/gtk3/unstable/GtkApplication.html">GtkApplication</link></p></item>
</list>
</section>
</page>
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