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

Uploading a file with drag-and-drop


In supported browsers, a file can also be dragged-and-dropped for uploading with fileUpload, and the component itself will be the drop zone.

How to do it...

The dragDropSupport attribute defines whether or not to enable drag-and-drop from the filesystem. By default, the value of this attribute is true. In order to provide drag-and-drop support, the fileUpload component should be in advanced mode, which is the default mode. The definition of the fileUpload component for uploading files with drag-and-drop would be as follows:

<p:fileUpload id="upload" value="#{fileController.file}"
  dragDropSupport="true"
  update="growl"
  fileUploadListener="#{fileController.handleFileUpload}" />

How it works...

The fileUploadListener attribute defines the method that will be invoked when a file is uploaded.

There's more...

For applying features like restricting file upload type, limiting maximum size limit, and so on please refer to the Basic, automatic, and multiple...