package com.vaadin.tests.minitutorials.v7a1;

import com.vaadin.server.Page.UriFragmentChangedEvent;
import com.vaadin.server.Page.UriFragmentChangedListener;
import com.vaadin.server.VaadinRequest;
import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.Label;
import com.vaadin.ui.UI;
import com.vaadin.ui.VerticalLayout;

/**
 * Mini tutorial code for
 * https://vaadin.com/wiki/-/wiki/Main/Using%20URI%20fragments
 *
 * @author Vaadin Ltd
 * @since 7.0.0
 */
public class UsingUriFragments extends UI {

    private VerticalLayout layout;

    @Override
    protected void init(VaadinRequest request) {
        layout = new VerticalLayout();
        layout.setMargin(true);
        setContent(layout);

        Label label = new Label(
                "Hello, your fragment is " + getPage().getUriFragment());
        layout.addComponent(label);

        // React to fragment changes
        getPage().addUriFragmentChangedListener(
                new UriFragmentChangedListener() {
                    @Override
                    public void uriFragmentChanged(
                            UriFragmentChangedEvent source) {
                        handleFragment(source.getUriFragment());
                    }
                });

        // Handle the fragment received in the initial request
        handleFragment(getPage().getUriFragment());

        layout.addComponent(
                new Button("Show and set fragment", new Button.ClickListener() {
                    @Override
                    public void buttonClick(ClickEvent event) {
                        handleFragment(getPage().getUriFragment());
                        getPage().setUriFragment("customFragment");
                    }
                }));
    }

    private void handleFragment(String uriFragment) {
        layout.addComponent(new Label("Got new fragment: " + uriFragment));
    }

}