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  • Book Overview & Buying PrimeFaces Cookbook
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PrimeFaces Cookbook

PrimeFaces Cookbook

3.3 (17)
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PrimeFaces Cookbook

PrimeFaces Cookbook

3.3 (17)

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)
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PrimeFaces Cookbook
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
1
Index

Creating dynamic image streaming programmatically


With the graphicImage component, it is possible to render an image that is created programmatically in the server-side backing bean.

How to do it...

The following is an example that renders a PrimeFaces logo that is read with the resource streaming mechanism.

<p:graphicImage value="#{dynaImageController.graphicText}" />

public StreamedContent getGraphicText() throws IOException {
  InputStream stream = this.getClass().getResourceAsStream("/chapter9/primefaces.jpg");
  return new DefaultStreamedContent(stream);
}

How it works…

As seen, the getGraphicText() method returns an instance of StreamedContent. PrimeFaces also provides a default implementation for the stream content, which is org.primefaces.model.DefaultStreamedContent. The backing bean containing the graphicText getter method should be defined in the session scope. The reason behind this is that the image will be fetched in a separate request from the rest of the page content,...

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PrimeFaces Cookbook
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