Vi
este artigo sobre o uso da libnotify a partir do Python numa das minhas sessões de googling e achei que era mais que positivo postá-lo aqui.
Desktop Notifications is a system for consolidating an API, UI and mechanism to allow applications, applets, services, etc. to notify the user when something interesting happens.
The software for this is currently hosted under the
Galago project, which is listed on freedesktop.org.
This software consists of a notification-daemon, a client API implemented by the libnotify library, the DBus system for tying things together, and finally various language bindings (so far only python and of course C)
The simplest way to add notifications to your app is to call the notify-send utility. But this is quite limited, and so not very interesting.
To use libnotify in a python application do the following:
GeSHi (python):
try:
import pynotify
if pynotify.init("My Application Name"):
n = pynotify.Notification("Title", "message")
n.show()
else:
print "there was a problem initializing the pynotify module"
except:
print "you don't seem to have pynotify installed"Created by GeSHI 1.0.7.20
You can set the urgency level to one of three values using the following:
GeSHi (python):
n.set_urgency(pynotify.URGENCY_LOW)
n.set_urgency(pynotify.URGENCY_NORMAL)
n.set_urgency(pynotify.URGENCY_CRITICAL)Created by GeSHI 1.0.7.20
One option to the Notification() call is to add an icon. This can use one of three methods:
1. a URI specifying the icon file name (e.g. file://path/to/my-icon.png)
2. a 'stock' icon name. One that would succeed in a call to gtk_icontheme_lookup() (e.g. 'stock-delete') Note: these are not necessarily normal GTK stock icons - any theme icon will work.
3. a pixbuf
For the first two methods, just specify the icon name or URI as the 3rd parameter to the Notification() call.
GeSHi (python):
n = pynotify.Notification("Title", "message", "icon-name")Created by GeSHI 1.0.7.20
For the pixbuf method use: (where 'icon' is a pixbuf)
GeSHi (python):
n.set_icon_from_pixbuf(icon)Created by GeSHI 1.0.7.20
To set the timeout value for the displayed message:
GeSHi (python):
n.set_timeout(seconds)Created by GeSHI 1.0.7.20
To position the message (e.g. to associate it with a toolbar applet)
GeSHi (python):
n.attach_to_widget(widget) # 'self' often works
# or position it explicitly
# n.set_hint("x", x-coordinate)
# n.set_hint("y", y-coordinate)Created by GeSHI 1.0.7.20
You can close the notification before it has timed out using
GeSHi (python):
n.close()Created by GeSHI 1.0.7.20
There's lots more you can do, such as putting buttons on the messages and getting callbacks when they are clicked, but that is beyond this tutorial. See the examples that come with the pynotify package to learn more.
