Login.java :  » Network » socialconferenceproject » at » socialconference » web » client » ui » Android Open Source

/** 
 * Copyright 2010 Erlacher Felix, Estgfaeller Wolfgang, Ferula Patrick
 *
 * 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 at.socialconference.web.client.ui;

import at.socialconference.inter.connection.protocol.SocketProtocol;
import at.socialconference.web.client.SCwebService;
import at.socialconference.web.client.SCwebService.Util;
import at.socialconference.web.client.util.AsyncCallbackGetClientUser;

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.KeyPressEvent;
import com.google.gwt.event.dom.client.KeyPressHandler;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.PasswordTextBox;
import com.google.gwt.user.client.ui.TextBox;

/**
 * Provides a login form
 * 
 */
public class Login extends Composite {

  private class LoginCallback implements AsyncCallback<Integer> {
    public void onSuccess(Integer result) {
      if (result == 1)
        Util.getInstance().getClientUser(new AsyncCallbackGetClientUser());
      else if (result == SocketProtocol.RESP_NO_LOGIN)
        Window.alert("Wrong username");
      else if (result == SocketProtocol.RESP_WRONG_PW)
        Window.alert("Wrong password");
      else if (result == SocketProtocol.RESP_SESSION_CREATION_FAILED)
        Window.alert("Session creation failed");
      else if (result == -1)
        Window.alert("Internal server error: Backend unreachable");
      else
        Window.alert("Internal server error...");
    }

    public void onFailure(Throwable caught) {
      Window.alert("Server error: Unable to reach server");
    }
  }

  // TextBox for the User Name
  private TextBox txtLogin = new TextBox();
  // PasswordTextBox for the password
  private PasswordTextBox txtPassword = new PasswordTextBox();
  /** Button Login for the login */
  private Button btnLogin = new Button("login");

  private FlowPanel content = new FlowPanel();

  public Login() {
    Label lblLogin = new Label("Please login to get full functionality");
    content.setStyleName("login");

    content.add(lblLogin);
    Label label = new Label("Username");
    content.add(label);
    content.add(txtLogin);
    content.add(new Label("Password"));
    content.add(txtPassword);
    btnLogin.setStyleName("login");
    content.add(btnLogin);

    txtPassword.addKeyPressHandler(new KeyPressHandler() {

      @Override
      public void onKeyPress(KeyPressEvent event) {
        char keyCode = event.getCharCode();
        if (keyCode == KeyCodes.KEY_ENTER) {
          SCwebService.Util.getInstance().login(txtLogin.getText(), txtPassword.getText(), new LoginCallback());
        }
      }
    });

    btnLogin.addClickHandler(new ClickHandler() {
      public void onClick(ClickEvent Klikka) {
        SCwebService.Util.getInstance().login(txtLogin.getText(), txtPassword.getText(), new LoginCallback());
      };
    });

    initWidget(content);
  }
}