/*******************************************************************************
*
* Copyright 2011 Spiffy UI Team
*
* 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 MY_PACKAGE.client;
import MY_PACKAGE.client.resources.HTMLResources;
import org.spiffyui.client.JSONUtil;
import org.spiffyui.client.MainFooter;
import org.spiffyui.client.MainHeader;
import org.spiffyui.client.MessageUtil;
import org.spiffyui.client.rest.RESTCallback;
import org.spiffyui.client.rest.RESTException;
import org.spiffyui.client.rest.RESTility;
import org.spiffyui.client.widgets.LongMessage;
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.KeyPressEvent;
import com.google.gwt.event.dom.client.KeyPressHandler;
import com.google.gwt.json.client.JSONObject;
import com.google.gwt.json.client.JSONValue;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.HTMLPanel;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.TextBox;
/**
* This class is the main entry point for our GWT module.
*/
public class Index implements EntryPoint, ClickHandler, KeyPressHandler
{
private static Index g_index;
private TextBox m_text = new TextBox();
private LongMessage m_longMessage = new LongMessage("longMsgPanel");
/**
* The Index page constructor
*/
public Index()
{
g_index = this;
}
@Override
public void onModuleLoad()
{
/*
This is where we load our module and create our dynamic controls. The MainHeader
displays our title bar at the top of our page.
*/
MainHeader header = new MainHeader();
header.setHeaderTitle("Hello Spiffy MY_PROJECT!");
/*
The main footer shows our message at the bottom of the page.
*/
MainFooter footer = new MainFooter();
footer.setFooterString("MY_PROJECT was built with the <a href=\"http://www.spiffyui.org\">Spiffy UI Framework</a>");
/*
This HTMLPanel holds most of our content.
MainPanel_html was built in the HTMLProps task from MainPanel.html, which allows you to use large passages of html
without having to string escape them.
*/
HTMLPanel panel = new HTMLPanel(HTMLResources.INSTANCE.getMainPanelHTML().getText())
{
@Override
public void onLoad()
{
super.onLoad();
/*
Let's set focus into the text field when the page first loads
*/
m_text.setFocus(true);
}
};
RootPanel.get("mainContent").add(panel);
/*
These dynamic controls add interactivity to our page.
*/
panel.add(m_longMessage, "longMsg");
panel.add(m_text, "nameField");
final Button button = new Button("Submit");
panel.add(button, "submitButton");
button.addClickHandler(this);
m_text.addKeyPressHandler(this);
}
@Override
public void onClick(ClickEvent event)
{
sendRequest();
}
@Override
public void onKeyPress(KeyPressEvent event)
{
/*
We want to submit the request if the user pressed enter
*/
if (event.getNativeEvent().getKeyCode() == KeyCodes.KEY_ENTER) {
sendRequest();
}
}
/**
* Send the REST request to the server and read the response back.
*/
private void sendRequest()
{
String q = m_text.getValue().trim();
if (q.equals("")) {
MessageUtil.showWarning("Please enter your name in the text field.", false);
return;
}
RESTility.callREST("simple/" + q, new RESTCallback() {
@Override
public void onSuccess(JSONValue val)
{
showSuccessMessage(val);
}
@Override
public void onError(int statusCode, String errorResponse)
{
MessageUtil.showError("Error. Status Code: " + statusCode + " " + errorResponse);
}
@Override
public void onError(RESTException e)
{
MessageUtil.showError(e.getReason());
}
});
}
/**
* Show the successful message result of our REST call.
*
* @param val the value containing the JSON response from the server
*/
private void showSuccessMessage(JSONValue val)
{
JSONObject obj = val.isObject();
String name = JSONUtil.getStringValue(obj, "user");
String browser = JSONUtil.getStringValue(obj, "userAgent");
String server = JSONUtil.getStringValue(obj, "serverInfo");
String message = "Hello, " + name + "! <br/>You are using " + browser + ".<br/>The server is " + server + ".";
m_longMessage.setHTML(message);
}
}