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

Custom ComboBox displays


The GXT ComboBox widget uses a ListView object which in turn uses a Template to render the drop-down list presented by the combo. Perhaps you've thought of a combo that displays a list formatted a certain way, such as a list of customers with all parts of their names or only last names bold and italicized for emphasis. What about a combo of countries with an icon of their flag shown on the left-hand side, the country name in the middle, and a computed value (for example, GDP) showing on the far right.

These and more can be achieved in ComboBox as well as other data-bound GXT widgets that render items directly or indirectly with templates, like the case of a ListView. Combining such flexible data formatting with the power of a ModelProcessor used to compute values into data objects means the possibilities are endless.

How to do it...

Build and configure a ComboBox, setting its display and value fields appropriately, as well as its store. Then use the setTemplate() method...