com.googlecode.konamigwt.hadoken.client.Hadoken.java Source code

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Here is the source code for com.googlecode.konamigwt.hadoken.client.Hadoken.java

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/**
 * "THE BEER-WARE LICENSE" (Revision 42):
 * Nicolas FRANCOIS wrote this software. As long as you retain this notice
 * you can do whatever you want with this stuff. If we meet some day,
 * and you think this stuff is worth it, you can buy me a beer in
 * return.
 */
package com.googlecode.konamigwt.hadoken.client;

import com.google.gwt.core.client.EntryPoint;
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.KeyUpEvent;
import com.google.gwt.event.dom.client.KeyUpHandler;
import com.google.gwt.media.client.Audio;
import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.Timer;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.DialogBox;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.Image;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.TextBox;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.googlecode.konamigwt.client.Konami;
import com.googlecode.konamigwt.client.KonamiHandler;
import com.googlecode.konamigwt.hadoken.shared.FieldVerifier;

/**
 * Entry point classes define <code>onModuleLoad()</code>.
 */
public class Hadoken implements EntryPoint {

    /**
     * This is the entry point method.
     */
    public void onModuleLoad() {

        final Button sendButton = new Button("Send");
        final TextBox nameField = new TextBox();
        nameField.setText("GWT User");
        final Label errorLabel = new Label();

        // We can add style names to widgets
        sendButton.addStyleName("sendButton");

        // Add the nameField and sendButton to the RootPanel
        // Use RootPanel.get() to get the entire body element
        RootPanel.get("nameFieldContainer").add(nameField);
        RootPanel.get("sendButtonContainer").add(sendButton);
        RootPanel.get("errorLabelContainer").add(errorLabel);

        // Focus the cursor on the name field when the app loads
        nameField.setFocus(true);
        nameField.selectAll();

        // Create the popup dialog box
        final DialogBox dialogBox = new DialogBox();
        dialogBox.setText("Remote Procedure Call");
        dialogBox.setAnimationEnabled(true);
        final Button closeButton = new Button("Close");
        // We can set the id of a widget by accessing its Element
        closeButton.getElement().setId("closeButton");
        final Label textToServerLabel = new Label();
        final HTML serverResponseLabel = new HTML();
        VerticalPanel dialogVPanel = new VerticalPanel();
        dialogVPanel.addStyleName("dialogVPanel");
        dialogVPanel.add(new HTML("<b>Sending name to the server:</b>"));
        dialogVPanel.add(textToServerLabel);
        dialogVPanel.add(new HTML("<br><b>Server replies:</b>"));
        dialogVPanel.add(serverResponseLabel);
        dialogVPanel.setHorizontalAlignment(VerticalPanel.ALIGN_RIGHT);
        dialogVPanel.add(closeButton);
        dialogBox.setWidget(dialogVPanel);

        // Add a handler to close the DialogBox
        closeButton.addClickHandler(new ClickHandler() {
            public void onClick(ClickEvent event) {

                dialogBox.hide();
                sendButton.setEnabled(true);
                sendButton.setFocus(true);
            }
        });

        // Quick and Dirty implementation
        new Konami(new KonamiHandler() {
            @Override
            public void onKonamiCodePerformed() {
                final Image image = new Image("media/ryu.gif");
                DOM.appendChild(RootPanel.get().getElement(), image.getElement());

                final Audio audio = Audio.createIfSupported();
                if (audio != null) {
                    audio.setSrc("media/hadoken.ogg");
                    DOM.appendChild(RootPanel.get().getElement(), audio.getElement());
                    audio.play();
                }
                Timer timer = new Timer() {

                    @Override
                    public void run() {
                        DOM.removeChild(RootPanel.get().getElement(), image.getElement());
                        if (audio != null) {
                            DOM.removeChild(RootPanel.get().getElement(), audio.getElement());
                        }
                    }

                };
                timer.schedule(1100);

            }
        }).start();

        // Create a handler for the sendButton and nameField
        class MyHandler implements ClickHandler, KeyUpHandler {
            /**
             * Fired when the user clicks on the sendButton.
             */
            public void onClick(ClickEvent event) {
                sendNameToServer();
            }

            /**
             * Fired when the user types in the nameField.
             */
            public void onKeyUp(KeyUpEvent event) {
                if (event.getNativeKeyCode() == KeyCodes.KEY_ENTER) {
                    sendNameToServer();
                }
            }

            /**
             * Send the name from the nameField to the server and wait for a response.
             */
            private void sendNameToServer() {
                // First, we validate the input.
                errorLabel.setText("");
                String textToServer = nameField.getText();
                if (!FieldVerifier.isValidName(textToServer)) {
                    errorLabel.setText("Please enter at least four characters");
                    return;
                }

                // Then, we send the input to the server.
                sendButton.setEnabled(false);
                textToServerLabel.setText(textToServer);
                serverResponseLabel.setText("");
                serverResponseLabel.removeStyleName("serverResponseLabelError");
                serverResponseLabel.setHTML("Hello " + textToServer);
                dialogBox.center();
                closeButton.setFocus(true);
            }
        }

        // Add a handler to send the name to the server
        MyHandler handler = new MyHandler();
        sendButton.addClickHandler(handler);
        nameField.addKeyUpHandler(handler);
    }
}