Gwt-ext Experience Tour, part 1th: Introduction to Gwt-ext

Overview

Gwt-ext is a powerful Web development control library based on Google Web Toolkit (GWT) and ExtJs. It expands GWT and implements a sort-enabled table (grid) based on ExtJs, paging, filtering, support for drag-and-drop trees, highly customizable combo drop-down boxes (Combobox), directories, dialogs, forms (form), and rich, powerful, and Easy-to-use APIs.

Gwt-ext has a license to the GNU Lesser General public Licence (LGPL), V3.0. So it's a very flexible control library that allows applications in open source and business.

GWT's introduction is already very rich, and our series focuses on the introduction and application of Gwt-ext. Gwt-ext is a further encapsulation of the presentation layer on the basis of GWT and ExtJs. We understand that GWT provides an Ajax set of basic frameworks, while ExtJs provides a very rich presentation layer interface based on JavaScript and CSS stylesheets. So Gwt-ext is based on GWT, mapping the ExtJs JavaScript interface or encapsulating it as a Java interface. In the Java environment, development and debugging development performance layer, can greatly improve the speed of development.

Gwt-ext development environment to build

In this series, a step-by-step description of how to build a gwt-ext development environment will be done in the way of examples. This chapter will build the demo platform framework in conjunction with the code, and demonstrate how to deploy this platform into the Tomcat container.

Download development environment

We will use Eclipse and plug-in Cypal Studio to build the control demo platform. Cypal Stutio is a GWT mature development tool. It's a great way to help build GWT's development and debugging environment, and to compile and package, eliminating the tedious process of developing GWT.

Products and technologies that need to be downloaded refer to the "Getting products and Technologies" section of the reference resource.

Installing the Cypal Studio plug-in

Extract eclipse to your local hard drive and extract cypal.studio.for.gwt-1.0.zip into Eclipse's plugins directory. Then unzip the downloaded Gwt-windows-1.5.0.zip. Finally, start Eclipse.

Select the Eclipse directory Window >preferences > Cypal stutio to complete the GWT-related information as shown in Figure 1. GWT home fills in GWT's solution directory. If the Java VM requirements are high, it can be raised from 512M to 1024M. As shown in Figure 1.

Figure 1. Cypal Studio Configuration