Login.java

package org.aplikator.client.local.command;

import javax.inject.Inject;

import org.aplikator.client.local.Aplikator;
import org.aplikator.client.shared.rpc.AplikatorErrorCallback;
import org.aplikator.client.shared.rpc.AplikatorService;
import org.gwtbootstrap3.client.ui.Button;
import org.gwtbootstrap3.client.ui.Container;
import org.gwtbootstrap3.client.ui.FormLabel;
import org.gwtbootstrap3.client.ui.Input;
import org.gwtbootstrap3.client.ui.Legend;
import org.gwtbootstrap3.client.ui.TextBox;
import org.jboss.errai.common.client.api.RemoteCallback;
import org.jboss.errai.enterprise.client.jaxrs.api.RestClient;
import org.jboss.errai.ui.nav.client.local.Page;
import org.jboss.errai.ui.nav.client.local.PageHidden;
import org.jboss.errai.ui.nav.client.local.PageShowing;
import org.jboss.errai.ui.nav.client.local.PageShown;

import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.KeyCodes;
import com.google.gwt.event.dom.client.KeyUpEvent;
import com.google.gwt.event.dom.client.KeyUpHandler;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.uibinder.client.UiHandler;
import com.google.gwt.user.client.ui.Composite;

@Page(path = "login")
public class Login extends Composite {

    private static LoginUiBinder loginUiBinder = GWT.create(LoginUiBinder.class);

    interface LoginUiBinder extends UiBinder<Container, Login> {
    }

    @Inject
    private Aplikator aplikator;

    @UiField
    Legend title;

    @UiField
    TextBox username;

    @UiField
    FormLabel usernameLabel;

    @UiField
    Input password;

    @UiField
    FormLabel passwordLabel;


    @UiField
    Button submit;


    public Login() {
        initWidget(loginUiBinder.createAndBindUi(this));
        title.setText(Aplikator.application.getConfigString("aplikator.login.title"));
        usernameLabel.setText(Aplikator.application.getConfigString("aplikator.login.username"));
        passwordLabel.setText(Aplikator.application.getConfigString("aplikator.login.password"));
        submit.setText(Aplikator.application.getConfigString("aplikator.login.submit"));
        KeyUpHandler onEnter = new KeyUpHandler() {
            @Override
            public void onKeyUp(KeyUpEvent event) {
                event.stopPropagation();
                if (event.getNativeKeyCode() == KeyCodes.KEY_ENTER) {
                    submit();
                }
            }
        };
        username.addKeyUpHandler(onEnter);
        password.addKeyUpHandler(onEnter);
    }

    @PageShowing
    public void enterLoginPage() {
        aplikator.displayLoginButton(false);
    }

    @PageShown
    public void grabFocus() {

        username.setFocus(true);
        username.setSelectionRange(0, username.getText().length());
    }

    @UiHandler("submit")
    public void submit(ClickEvent event) {
        submit();
    }

    private void submit() {
        RestClient.create(AplikatorService.class, new RemoteCallback<Void>() {
                    @Override
                    public void callback(Void response) {
                        aplikator.reloadApplication(true);

                    }
                },
                new AplikatorErrorCallback()
        ).login(username.getText(), password.getText());

    }

    @PageHidden
    public void leaveLoginPage() {
        aplikator.displayLoginButton(true);
    }


}