Book Image

PrimeFaces Cookbook

Book Image

PrimeFaces Cookbook

Overview of this book

PrimeFaces is the de facto standard in the Java web development. PrimeFaces is a lightweight library with one jar, zero-configuration, and no required dependencies. You just need to download PrimeFaces, add the primefaces-{version}.jar to your classpath and import the namespace to get started. This cookbook provides a head start by covering all the knowledge needed for working with PrimeFaces components in the real world. "PrimeFaces Cookbook" covers over 100 effective recipes for PrimeFaces 3.x which is a leading component suite to boost JSF applications. The book's range is wide‚Äí from AJAX basics, theming, and input components to advanced usage of datatable, menus, drag & drop, and charts. It also includes creating custom components and PrimeFaces Extensions.You will start with the basic concepts such as installing PrimeFaces, configuring it, and writing a first simple page. You will learn PrimeFaces' theming concept and common inputs and selects components. After that more advanced components and use cases will be discussed. The topics covered are grouping content with panels, data iteration components, endless menu variations, working with files and images, using drag & drop, creating charts, and maps. The last chapters describe solutions for frequent, advanced scenarios and give answers on how to write custom components based on PrimeFaces and also show the community-driven open source project PrimeFaces Extension in action.
Table of Contents (17 chapters)
PrimeFaces Cookbook
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Adding AJAX callback parameters – validation within a dialog


This recipe will continue with the discussion on RequestContext that we began in the previous recipes. There may be cases where we need values from backing beans in AJAX callbacks. Suppose we have a form in a dialog; when the user submits the form, the dialog should stay open to display any validation errors and it should be closed otherwise.

In this recipe, we will learn how the described task can be done with AJAX callback parameters. We will develop an oncomplete callback for a command button within p:dialog.

How to do it...

The developed page contains a Dialog component with an input field. The dialog will be visible when the page is loaded. There is only one valid input value—PrimeFaces Cookbook. When the user inputs this value and clicks on the Save button, the dialog should be closed. In any other case, it should stay open. The button p:commandButton defines an oncomplete callback handleComplete(xhr, status, args). It gets...