Package gaetest.client

Source Code of gaetest.client.MyHandler

package gaetest.client;

import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.core.client.GWT;
import com.google.gwt.core.client.GWT.UncaughtExceptionHandler;
import com.google.gwt.event.dom.client.*;
import com.google.gwt.event.shared.EventBus;
import com.google.gwt.event.shared.SimpleEventBus;
import com.google.gwt.user.client.ui.*;
import com.google.web.bindery.requestfactory.gwt.client.RequestFactoryLogHandler;
import com.google.web.bindery.requestfactory.shared.LoggingRequest;
import com.google.web.bindery.requestfactory.shared.Receiver;
import gaetest.shared.FieldVerifier;
import gaetest.shared.TestRequestFactory;
import gaetest.shared.TestRequestFactory.UserRequest;
import gaetest.shared.UserProxy;

import java.util.ArrayList;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
* Entry point classes define <code>onModuleLoad()</code>.
*/
public class Gaetest implements EntryPoint {
  /**
   * The message displayed to the user when the server cannot be reached or
   * returns an error.
   */
  private static final String SERVER_ERROR = "An error occurred while "
      + "attempting to contact the server. Please check your network "
      + "connection and try again.";

  /**
   * Create a remote service proxy to talk to the server-side Greeting service.
   */
  private final GreetingServiceAsync greetingService = GWT
      .create(GreetingService.class);

  private static final Logger log = Logger.getLogger(Gaetest.class.getName());
  EventBus eventBus = new SimpleEventBus();

  /**
   * This is the entry point method.
   */
  @Override
  public void onModuleLoad() {
    GWT.setUncaughtExceptionHandler(new UncaughtExceptionHandler() {
      @Override
      public void onUncaughtException(Throwable e) {
        log.log(Level.SEVERE, e.getMessage(), e);
      }
    });

    final TestRequestFactory requests = GWT.create(TestRequestFactory.class);
    requests.initialize(eventBus);

    RequestFactoryLogHandler.LoggingRequestProvider provider = new RequestFactoryLogHandler.LoggingRequestProvider() {
      @Override
      public LoggingRequest getLoggingRequest() {
        return requests.loggingRequest();
      }
    };
    // Logger.getLogger("").addHandler(new ErrorDialog().getHandler());
    Logger.getLogger("").addHandler(
        new RequestFactoryLogHandler(provider, Level.ALL,
            new ArrayList<String>()));

    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() {
      @Override
      public void onClick(ClickEvent event) {
        dialogBox.hide();
        sendButton.setEnabled(true);
        sendButton.setFocus(true);
      }
    });

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

      /**
       * Fired when the user types in the nameField.
       */
      @Override
      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("");
        UserRequest userContext = requests.userRequest();
        UserProxy user = userContext.create(UserProxy.class);
        user.setName(textToServer);
        userContext.save(user).fire(new Receiver<Long>() {

          @Override
          public void onSuccess(Long response) {
//            String result = response.toString();
            dialogBox.setText("Remote Procedure Call");
            serverResponseLabel.removeStyleName("serverResponseLabelError");
            serverResponseLabel.setHTML("User id: ");
            dialogBox.center();
            closeButton.setFocus(true);
          }

        });

        // greetingService.greetServer(textToServer, new AsyncCallback<String>()
        // {
        // public void onFailure(Throwable caught) {
        // // Show the RPC error message to the user
        // dialogBox.setText("Remote Procedure Call - Failure");
        // serverResponseLabel.addStyleName("serverResponseLabelError");
        // serverResponseLabel.setHTML(SERVER_ERROR);
        // dialogBox.center();
        // closeButton.setFocus(true);
        // }
        //
        // public void onSuccess(String result) {
        // dialogBox.setText("Remote Procedure Call");
        // serverResponseLabel.removeStyleName("serverResponseLabelError");
        // serverResponseLabel.setHTML(result);
        // 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);
  }
}
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