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# coding=utf-8
"""Convert a simple GTK+ program to be a Sugar activity.
You must convert the simple GTK+ program from exercise 17 to be a Sugar
activity.
All the other files for the activity (activity.info, setup.py, etc.) have been
provided already; you must simply modify the code in this file to derive the
class from sugar3.activity.activity.Activity instead of from Gtk.Window, and
make a few other changes.
1. Remove the “#!/usr/bin/python” line from the top of the file.
The first line of the file should now be “# coding=utf-8”.
2. Rename the class to “Exercise18Activity”.
3. Add a ‘handle’ parameter to __init__ and propagate it to the parent
constructor in the super() call.
4. Remove the window title from the constructor super() call.
5. Remove the call to set_default_size() and the window destroy callback.
6. Add an activity toolbar (ToolbarBox), and add an activity button
(ActivityToolbarButton) and a stop button (StopButton) to it.
7. Change the self.add() call to self.set_canvas().
8. In a terminal, change to this directory and run ‘./setup.py dev’ to add the
activity to Sugar on your computer.
9. In a terminal, run ‘sugar-emulator’ and test the activity.
Note that the necessary ‘import’ statements have already been added to the
file.
Don't forget to document any new methods you add.
Hint: The code necessary for step 6 is:
# Create the standard activity toolbox.
toolbar_box = ToolbarBox()
self.set_toolbar_box(toolbar_box)
toolbar_box.show()
main_toolbar = toolbar_box.toolbar
activity_toolbar_button = widgets.ActivityToolbarButton(self)
main_toolbar.insert(activity_toolbar_button, 0)
activity_toolbar_button.show()
stop_button = widgets.StopButton(self)
stop_button.show()
main_toolbar.insert(stop_button, -1)
"""
from gi.repository import Gtk
from sugar3.activity import activity, widgets
from sugar3.graphics.toolbarbox import ToolbarBox
from sugar3.graphics.toolbutton import ToolButton
class Exercise18Activity(activity.Activity):
"""A simple window which displays a label and a button."""
def __init__(self, handle):
super(Exercise18Activity, self).__init__(handle)
# Create the standard activity toolbox.
toolbar_box = ToolbarBox()
self.set_toolbar_box(toolbar_box)
toolbar_box.show()
main_toolbar = toolbar_box.toolbar
activity_toolbar_button = widgets.ActivityToolbarButton(self)
main_toolbar.insert(activity_toolbar_button, 0)
activity_toolbar_button.show()
stop_button = widgets.StopButton(self)
stop_button.show()
main_toolbar.insert(stop_button, -1)
# Add a box to the window.
box = Gtk.Box()
box.set_orientation(Gtk.Orientation.VERTICAL)
box.set_spacing(8)
box.set_border_width(8)
box.show()
self.set_canvas(box)
# Create and set up the label and button.
label = Gtk.Label('Initial label.')
label.show()
box.pack_start(label, True, True, 0)
button = Gtk.Button('Change Label')
button.show()
box.pack_start(button, False, True, 0)
# Connect the button callback.
button.connect('clicked', self.__button_clicked_cb)
# Store the label as an object variable so it can be accessed from the
# button callback.
self._label = label
def __button_clicked_cb(self, button):
"""Callback to change the label text when the button is clicked."""
self._label.set_text('Final label.')
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