LoginView.java

/*
 * Copyright 2014-2016 CyberVision, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.kaaproject.kaa.server.admin.client.login;

import com.google.gwt.core.client.GWT;
import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.safehtml.shared.SafeHtmlUtils;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.FlexTable;
import com.google.gwt.user.client.ui.FormPanel;
import com.google.gwt.user.client.ui.HTMLPanel;
import com.google.gwt.user.client.ui.HasHorizontalAlignment;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.PasswordTextBox;
import com.google.gwt.user.client.ui.TextBox;
import com.google.gwt.user.client.ui.Widget;

import org.kaaproject.avro.ui.gwt.client.widget.AlertPanel;
import org.kaaproject.avro.ui.gwt.client.widget.AlertPanel.Type;
import org.kaaproject.kaa.server.admin.client.KaaAdminResources.KaaAdminStyle;
import org.kaaproject.kaa.server.admin.client.util.HasErrorMessage;
import org.kaaproject.kaa.server.admin.client.util.Utils;

public class LoginView extends Composite implements HasErrorMessage {
  private static LoginViewUiBinder uiBinder = GWT.create(LoginViewUiBinder.class);
  @UiField(provided = true)
  final AlertPanel errorPanel;
  @UiField(provided = true)
  final AlertPanel infoPanel;
  @UiField(provided = true)
  final KaaAdminStyle kaaAdminStyle;
  @UiField
  HTMLPanel loginTitle;
  @UiField
  FormPanel loginForm;
  @UiField
  FlexTable loginTable;
  private TextBox usernameBox;
  private PasswordTextBox passwordBox;
  private Button loginButton;
  private Label forgotPasswordLabel;

  /**
   * Instantiates a new LoginView.
   */
  public LoginView() {

    errorPanel = new AlertPanel(Type.ERROR);
    infoPanel = new AlertPanel(Type.INFO);
    kaaAdminStyle = Utils.kaaAdminStyle;

    initWidget(uiBinder.createAndBindUi(this));

    loginTitle.getElement().setInnerSafeHtml(
        SafeHtmlUtils.fromSafeConstant(Utils.messages.loginTitle()));

    usernameBox = new TextBox();
    usernameBox.setName("j_username");
    usernameBox.setWidth("100%");

    passwordBox = new PasswordTextBox();
    passwordBox.setName("j_password");
    passwordBox.setWidth("100%");

    Label loginLabel = new Label(Utils.constants.username());
    loginTable.setWidget(0, 0, loginLabel);
    loginTable.setWidget(0, 1, usernameBox);
    Label passwordLabel = new Label(Utils.constants.password());
    loginTable.setWidget(1, 0, passwordLabel);
    loginTable.setWidget(1, 1, passwordBox);

    forgotPasswordLabel = new Label(Utils.constants.forgotPassword());
    forgotPasswordLabel.addStyleName(Utils.kaaAdminStyle.linkLabel());
    loginTable.setWidget(2, 0, forgotPasswordLabel);

    loginTable.getFlexCellFormatter().setWidth(0, 0, "130px");
    loginTable.getFlexCellFormatter()
        .setHorizontalAlignment(0, 0, HasHorizontalAlignment.ALIGN_RIGHT);
    loginTable.getFlexCellFormatter()
        .setHorizontalAlignment(1, 0, HasHorizontalAlignment.ALIGN_RIGHT);
    loginTable.getFlexCellFormatter()
        .setHorizontalAlignment(2, 0, HasHorizontalAlignment.ALIGN_RIGHT);
    loginTable.getFlexCellFormatter()
        .setColSpan(2, 0, 2);

    loginButton = new Button(Utils.constants.login());
    loginButton.addStyleName(Utils.kaaAdminStyle.loginButton());
    loginTable.setWidget(3, 2, loginButton);
    loginButton.getElement().getStyle().setMarginTop(15, Unit.PX);

    loginForm.setWidget(loginTable);
    loginForm.setAction("");

  }

  public Button getLoginButton() {
    return loginButton;
  }

  public TextBox getUsernameBox() {
    return usernameBox;
  }

  public PasswordTextBox getPasswordBox() {
    return passwordBox;
  }

  public Label getForgotPasswordLabel() {
    return forgotPasswordLabel;
  }

  @Override
  public void clearError() {
    errorPanel.setMessage("");
    errorPanel.setVisible(false);
  }

  @Override
  public void setErrorMessage(String message) {
    errorPanel.setMessage(message);
    errorPanel.setVisible(true);
  }

  /**
   * Clear messages.
   */
  public void clearMessages() {
    errorPanel.setMessage("");
    errorPanel.setVisible(false);
    infoPanel.setMessage("");
    infoPanel.setVisible(false);
  }

  public void setInfoMessage(String message) {
    infoPanel.setMessage(message);
    infoPanel.setVisible(true);
  }

  interface LoginViewUiBinder extends UiBinder<Widget, LoginView> {
  }

}