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  • Book Overview & Buying DWR Java AJAX Applications
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DWR Java AJAX Applications

DWR Java AJAX Applications

By : Sami Salkosuo
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DWR Java AJAX Applications

DWR Java AJAX Applications

5 (2)
By: Sami Salkosuo
Buy this Book

Overview of this book

Table of Contents (12 chapters)
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DWR Java AJAX Applications
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DWR Java AJAX Applications
Credits
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Credits
About the Author
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About the Author
About the Reviewers
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About the Reviewers
Preface
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Preface
Lock Free Chapter
1
Introduction
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Introduction
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What is AJAX?
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DWR: AJAX for Java Developers
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The DWR Community
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Summary
2
DWR Features
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DWR Features
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Ease of Use
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Reverse AJAX
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DWR JavaScript Libraries
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Converters
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Creators, Filters, and Signatures
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Integration with Other Projects
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Security
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Summary
3
Getting Started
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Getting Started
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Supported Browsers and Environments
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Configuration
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Setting up a Development Environment
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Testing and Debugging
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Error Handling
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Packaging and Deployment
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Summary
4
User Interface: Basic Elements
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User Interface: Basic Elements
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Creating a Dynamic User Interface
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Implementing Tables and Lists
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Implementing Field Completion
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Summary
5
User Interface: Advanced Elements
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User Interface: Advanced Elements
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Creating Forms
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Building a Navigation Tree
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Map Scrolling Using DWR
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Summary
6
Backend Integration
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Backend Integration
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Integrating a Database with DWR
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Integrating with Web Services
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Integrating with a Messaging System
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Summary
7
Sample Applications
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Sample Applications
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Collaborative Book Authoring
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Chatroom
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Summary

Map Scrolling Using DWR

The last sample in this chapter is a map scrolling sample using DWR. Browser-based, mouse-controlled scrolling maps have become popular since Google Maps was launched.

The principle idea, in the implementation of this sample, is to take a sufficiently large map and divide it to small squares of equal size. Then, based on the location, a certain number of the small squares are inserted into the visible map window, and when the user scrolls the map, by pressing the left mouse button, and dragging the mouse in the map window, new map squares are retrieved from the server (other implementations may also download map squares around the visible map window).

In this sample, we use a geological map of the Tempe-Mareotis region of Mars, provided by the U.S. Geological Survey Astrogeology Research Program (http://astrogeology.usgs.gov/). For a direct link to the map and additional information, refer to http://astrogeology.usgs.gov/Projects/MapBook/fulllisting.jsp?mapNumber...

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