kalumet-modules/console/src/main/java/org/apache/kalumet/console/app/LoginScreen.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.kalumet.console.app;

import nextapp.echo2.app.Button;
import nextapp.echo2.app.ContentPane;
import nextapp.echo2.app.Extent;
import nextapp.echo2.app.Grid;
import nextapp.echo2.app.Label;
import nextapp.echo2.app.PasswordField;
import nextapp.echo2.app.Row;
import nextapp.echo2.app.SplitPane;
import nextapp.echo2.app.TextField;
import nextapp.echo2.app.WindowPane;
import nextapp.echo2.app.event.ActionEvent;
import nextapp.echo2.app.event.ActionListener;

/**
 * Login screen <code>ContentPane</code>.
 */
public class LoginScreen
    extends ContentPane
{

    private TextField usernameField;

    private PasswordField passwordField;

    // the menu listener
    private ActionListener aboutButtonActionListener = new ActionListener()
    {

        public void actionPerformed( ActionEvent event )
        {
            if ( KalumetConsoleApplication.getApplication().getDefaultWindow().getComponent( "about" ) == null )
            {
                KalumetConsoleApplication.getApplication().getDefaultWindow().getContent().add( new AboutWindow() );
            }
        }

    };

    /**
     * Create a new <code>LoginScreen</code>.
     */
    public LoginScreen()
    {
        super();

        // define a title pane
        SplitPane titlePane = new SplitPane( SplitPane.ORIENTATION_VERTICAL_TOP_BOTTOM, new Extent( 30, Extent.PX ) );
        titlePane.setResizable( false );
        add( titlePane );
        Label titleLabel = new Label( Messages.getString( "kalumet.console" ) );
        titleLabel.setStyleName( "title" );
        titlePane.add( titleLabel );

        // create a menu pane
        SplitPane menuPane = new SplitPane( SplitPane.ORIENTATION_VERTICAL, new Extent( 26 ) );
        menuPane.setResizable( false );
        titlePane.add( menuPane );

        // create the menu row
        Row menuRow = new Row();
        menuRow.setStyleName( "menu" );
        menuPane.add( menuRow );
        Button aboutButton = new Button( Messages.getString( "about" ), Styles.INFORMATION );
        aboutButton.setStyleName( "default" );
        aboutButton.addActionListener( aboutButtonActionListener );
        menuRow.add( aboutButton );

        // create the split central pane
        SplitPane mainPane = new SplitPane( SplitPane.ORIENTATION_HORIZONTAL_LEFT_RIGHT, new Extent( 200, Extent.PX ) );
        menuPane.add( mainPane );
        ContentPane leftPane = new ContentPane();
        leftPane.setStyleName( "left" );
        mainPane.add( leftPane );
        ContentPane centralPane = new ContentPane();
        centralPane.setStyleName( "central" );
        mainPane.add( centralPane );

        // create a new window for login fields
        WindowPane loginWindow = new WindowPane();
        loginWindow.setStyleName( "login" );
        loginWindow.setTitle( Messages.getString( "login" ) );
        loginWindow.setIcon( Styles.USER );
        loginWindow.setDefaultCloseOperation( WindowPane.DO_NOTHING_ON_CLOSE );
        add( loginWindow );

        SplitPane splitPane = new SplitPane( SplitPane.ORIENTATION_VERTICAL_BOTTOM_TOP, new Extent( 32 ) );
        loginWindow.add( splitPane );

        Row controlRow = new Row();
        controlRow.setStyleName( "control" );
        splitPane.add( controlRow );

        Button button = new Button( Messages.getString( "continue" ), Styles.ACCEPT );
        button.setStyleName( "control" );
        button.addActionListener( new ActionListener()
        {
            public void actionPerformed( ActionEvent e )
            {
                processLogin();
            }
        } );
        controlRow.add( button );

        Grid layoutGrid = new Grid();
        layoutGrid.setStyleName( "login" );
        splitPane.add( layoutGrid );

        Label label = new Label( Messages.getString( "username" ) );
        label.setStyleName( "default" );
        layoutGrid.add( label );

        usernameField = new TextField();
        usernameField.setStyleName( "default" );
        usernameField.addActionListener( new ActionListener()
        {
            public void actionPerformed( ActionEvent e )
            {
                KalumetConsoleApplication.getApplication().setFocusedComponent( passwordField );
            }
        } );
        layoutGrid.add( usernameField );

        label = new Label( Messages.getString( "password" ) );
        label.setStyleName( "default" );
        layoutGrid.add( label );

        passwordField = new PasswordField();
        passwordField.setStyleName( "default" );
        layoutGrid.add( passwordField );
        passwordField.addActionListener( new ActionListener()
        {
            public void actionPerformed( ActionEvent e )
            {
                processLogin();
            }
        } );

        KalumetConsoleApplication.getApplication().setFocusedComponent( usernameField );
    }

    /**
     * Process a user log-in request
     */
    private void processLogin()
    {

        String userid = usernameField.getText();
        String password = passwordField.getText();

        usernameField.setText( "" );
        passwordField.setText( "" );
        KalumetConsoleApplication.getApplication().setFocusedComponent( usernameField );

        KalumetConsoleApplication.getApplication().connect( userid, password );
    }

}