JakeWharton

/* Base fragment to ensure the parent activity implements a contract interface. */
public abstract class ContractFragment<T> extends Fragment {
    private T mContract;

    @Override
    public void onAttach(Activity activity) {
        try {
            mContract = (T)activity;
        } catch (ClassCastException e) {
            throw new IllegalStateException(activity.getClass().getSimpleName()

kklimonda

import sys
from gi.repository import Gtk, Gdk, WebKit

class BrowserTab(Gtk.VBox):
    def __init__(self, *args, **kwargs):
        super(BrowserTab, self).__init__(*args, **kwargs)

        go_button = Gtk.Button("go to...")
        go_button.connect("clicked", self._load_url)
        self.url_bar = Gtk.Entry()