Book Image

ExtGWT Rich Internet Application Cookbook

By : Odili Charles Opute , Oded Nissan
Book Image

ExtGWT Rich Internet Application Cookbook

By: Odili Charles Opute , Oded Nissan

Overview of this book

<p>Get ready to build the next generation Gmail, Facebook, or Meebo, with HTML5 and Server Push, taking advantage of the power and versatility of Java with ExtGWT. Sencha Ext GWT takes GWT to the next level, giving you high-performance widgets, feature-rich templates and layouts, advanced charting, data loaders and stores,&nbsp; accessibility, and much more.<br /><br /><i>ExtGWT Rich Internet Application Cookbook will teach you to quickly build&nbsp; stunning functionality into your own apps with ExtGWT</i>.<br /><br />This is a catalog of practical solutions to get your ExtGWT web app up and running in no time, with tips for persistence and best practices. You begin by playing with panels, windows, and tabs, to learn the essentials. Next, you engage yourself with forms, buttons, toolbars and menus to build on further. Dealing with the UI and the trees will follow to help you make stunning user interfaces. Then you will be taught to work with Listview, Views, and Gridpanels, the more complex problems. The book will then deal with charts, visualization, and drag and drop to take you to the next level. Finally, you will wind up with serialization, persistence, and custom theming. Now, you are an expert!</p>
Table of Contents (22 chapters)
ExtGWT Rich Internet Application Cookbook
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Event Handling — Making Those GUIs Do Something
Jakarta Commons-FileUpload

Using an area chart


The area chart is actually a line chart, but with added ability to communicate the scope of its coverage with a solid fill color under its line. It is basically a colored line chart with two or more line plots.

How to do it...

Create a Chart and ChartModel object and then an AreaChart object for each area you want to plot, each having an appropriate label/legend and color with its setText() and setColour() methods respectively. The ChartModel can then be set on the chart object after giving the model a XAxis and YAxis object.

Once the data is ready, we build a list of Label objects for XAxis and then a list of Number values for each area in the chart. The values built are then given to their respective AreaChart object with areaChart.addValues() and then they are in turn added to ChartModel using model.addChartConfig() for each.

@Override
public void onModuleLoad() {
// create the Chart object
Chart chart = new Chart("resources/chart/open-flash-chart.swf");
// create...