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PrimeFaces Cookbook

You're reading from   PrimeFaces Cookbook Here are over 100 recipes for PrimeFaces, the ultimate JSF framework. It's a great practical introduction to leading-edge Java web development, taking you from the basics right through to writing custom components.

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Product type Paperback
Published in Jan 2013
Publisher Packt
ISBN-13 9781849519281
Length 328 pages
Edition 1st Edition
Languages
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Author (1):
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Mert Caliskan Mert Caliskan
Author Profile Icon Mert Caliskan
Mert Caliskan
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Toc

Table of Contents (17) Chapters Close

PrimeFaces Cookbook
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
1. Getting Started with PrimeFaces FREE CHAPTER 2. Theming Concept 3. Enhanced Inputs and Selects 4. Grouping Content with Panels 5. Data Iteration Components 6. Endless Menu Variations 7. Working with Files and Images 8. Drag Me, Drop Me 9. Creating Charts and Maps 10. Miscellaneous, Advanced Use Cases Index

Cropping images


The imageCropper component provides image cropping functionality by allowing to us crop a certain region of an image, which could either be a local image or an external image. After cropping, a new image is created. It contains the cropped region and it is assigned to a CroppedImage instance.

How to do it...

The org.primefaces.model.CroppedImage class belongs to the PrimeFaces API, and the structure of the class is as follows:

public class CroppedImage {
  String originalFilename;
  byte[] bytes;
  int left;
  int top;
  int width;
  int height;
}

A simple definition of the image cropper for cropping a local image would be as shown in the following code line. The value of the component is bound with an instance of CroppedImage.

<p:imageCropper value="#{imageController.croppedImageSimple}" image="/resources/images/crop/primefaces.jpg" />

When hovered on the image, the cursor of the mouse will change to crosshairs for making the crop region selection. When the region is selected...

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