it.unibo.cs.v2.client.LoginPage.java Source code

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Here is the source code for it.unibo.cs.v2.client.LoginPage.java

Source

/* Copyright 2011 Massimo Gengarelli <gengarel@cs.unibo.it>
 * This file is part of Floz Configurator.
 * Floz Configurator is free software: you can redistribute it and/or modify it 
 * under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or 
 * (at your option) any later version.
 *
 * Floz Configurator is distributed in the hope that it will be useful, but 
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License 
 * along with Floz Configurator. If not, see http://www.gnu.org/licenses/.
 */

package it.unibo.cs.v2.client;

import it.unibo.cs.v2.servlets.LoginUser;
import it.unibo.cs.v2.servlets.LoginUserAsync;

import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.dom.client.KeyCodes;
import com.google.gwt.event.dom.client.KeyDownEvent;
import com.google.gwt.event.dom.client.KeyDownHandler;
import com.google.gwt.event.logical.shared.CloseEvent;
import com.google.gwt.event.logical.shared.CloseHandler;
import com.google.gwt.user.client.Cookies;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.DisclosurePanel;
import com.google.gwt.user.client.ui.FlexTable;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.HTMLPanel;
import com.google.gwt.user.client.ui.PasswordTextBox;
import com.google.gwt.user.client.ui.TextBox;

public class LoginPage extends HTMLPanel implements ClickHandler, KeyDownHandler {
    private TextBox userName = new TextBox();
    private PasswordTextBox password = new PasswordTextBox();
    private Button submitButton = new Button("Login");

    private LoginUserAsync userProxy = (LoginUserAsync) GWT.create(LoginUser.class);

    private HTML errorLabel = new HTML();

    private DisclosurePanel disclosure = new DisclosurePanel("Register a new user");

    private AsyncCallback<Boolean> callback;

    public LoginPage() {
        super("");

        FlexTable mainTable = new FlexTable();
        errorLabel.setVisible(false);
        errorLabel.getElement().getStyle().setColor("red");

        disclosure.setContent(new RegistrationForm());

        if (Cookies.getCookie("login") != null) {
            userName.setText(Cookies.getCookie("login"));
            password.setFocus(true);
        } else
            userName.setFocus(true);

        mainTable.clear();

        /* First row */
        mainTable.setWidget(0, 0, new HTML("<b>Username</b>"));
        mainTable.setWidget(0, 1, userName);

        mainTable.setWidget(1, 0, new HTML("<b>Password</b>"));
        mainTable.setWidget(1, 1, password);

        mainTable.setWidget(2, 0, submitButton);
        mainTable.getElement().setAttribute("align", "center");

        add(mainTable);
        add(errorLabel);
        add(disclosure);

        disclosure.getElement().setAttribute("align", "center");
        disclosure.setAnimationEnabled(true);

        disclosure.addCloseHandler(new CloseHandler<DisclosurePanel>() {
            @Override
            public void onClose(CloseEvent<DisclosurePanel> event) {
                ((RegistrationForm) disclosure.getContent()).hideLabel();
            }
        });

        submitButton.addClickHandler(this);
        password.addKeyDownHandler(this);
    }

    public final void setAsyncCallback(AsyncCallback<Boolean> callback) {
        this.callback = callback;
    }

    public void showError(String error) {
        errorLabel.setHTML(error);
        errorLabel.setVisible(true);
    }

    public void hideError() {
        errorLabel.setVisible(false);
    }

    public String getProvidedLogin() {
        return userName.getText();
    }

    public String getProvidedPassword() {
        return password.getText();
    }

    @Override
    public void onKeyDown(KeyDownEvent event) {
        if (event.getNativeKeyCode() == KeyCodes.KEY_ENTER)
            userProxy.loginUser(userName.getText(), password.getText(), callback);
    }

    @Override
    public void onClick(ClickEvent event) {
        userProxy.loginUser(userName.getText(), password.getText(), callback);
    }
}