--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-client/src/main/java/de/intevation/flys/client/client/FLYS.java	Tue Feb 08 10:29:49 2011 +0000
@@ -0,0 +1,147 @@
+package de.intevation.flys.client.client;
+
+import de.intevation.flys.client.shared.FieldVerifier;
+import com.google.gwt.core.client.EntryPoint;
+import com.google.gwt.core.client.GWT;
+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.user.client.rpc.AsyncCallback;
+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.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;
+
+/**
+ * Entry point classes define <code>onModuleLoad()</code>.
+ */
+public class FLYS 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);
+
+  /**
+   * 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);
+      }
+    });
+
+    // 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("");
+        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);
+  }
+}