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package com.vaadin.tests.navigator;
import com.vaadin.navigator.Navigator;
import com.vaadin.navigator.View;
import com.vaadin.navigator.ViewBeforeLeaveEvent;
import com.vaadin.navigator.ViewChangeListener.ViewChangeEvent;
import com.vaadin.navigator.ViewLeaveAction;
import com.vaadin.server.VaadinRequest;
import com.vaadin.tests.components.AbstractTestUI;
import com.vaadin.ui.Button;
import com.vaadin.ui.HorizontalLayout;
import com.vaadin.ui.Label;
import com.vaadin.ui.TextField;
import com.vaadin.ui.VerticalLayout;
import com.vaadin.ui.Window;
public class DelayedViewLeaveConfirmation extends AbstractTestUI {
public static class OtherView extends VerticalLayout implements View {
public OtherView() {
addComponent(new Label("Just another view"));
}
@Override
public void enter(ViewChangeEvent event) {
}
}
public static class MainView extends VerticalLayout implements View {
private Label saved;
private TextField input;
public MainView() {
saved = new Label("Initial");
saved.setCaption("Saved value");
input = new TextField("Enter a value");
input.setId("input");
Button navigateAway = new Button("Navigate to the other view",
event -> getUI().getNavigator().navigateTo("other"));
Button logout = new Button("Simulate logout", event -> getUI()
.getNavigator().runAfterLeaveConfirmation(() -> {
removeAllComponents();
addComponent(new Label("You have been logged out"));
getUI().getPage().setUriFragment("", false);
}));
navigateAway.setId("navigateAway");
logout.setId("logout");
addComponents(saved, input, navigateAway, logout);
}
@Override
public void enter(ViewChangeEvent event) {
input.setValue(saved.getValue());
}
@Override
public void beforeLeave(ViewBeforeLeaveEvent event) {
boolean hasChanges = !(saved.getValue().equals(input.getValue()));
if (hasChanges) {
getUI().addWindow(new ConfirmationWindow(event::navigate));
} else {
event.navigate();
}
}
}
public static class ConfirmationWindow extends Window {
public ConfirmationWindow(ViewLeaveAction action) {
super();
VerticalLayout layout = new VerticalLayout();
layout.addComponent(new Label(
"You have unsaved changes. Are you sure you want to leave?"));
Button leave = new Button("YES, LEAVE!", event -> {
close();
action.run();
});
leave.setId("leave");
Button stay = new Button("NO, STAY!", event -> close());
stay.setId("stay");
layout.addComponents(new HorizontalLayout(leave, stay));
setContent(layout);
}
}
@Override
protected void setup(VaadinRequest request) {
setNavigator(new Navigator(this, this));
getNavigator().addView("main", MainView.class);
getNavigator().addView("other", OtherView.class);
}
}
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