Book Image

Learning Ext JS 3.2

By : Shea Frederick, Colin Ramsay, Steve 'Cutter' Blades, Nigel White
Book Image

Learning Ext JS 3.2

By: Shea Frederick, Colin Ramsay, Steve 'Cutter' Blades, Nigel White

Overview of this book

<p>As more and more of our work is done through a web browser, and more businesses build web rather than desktop applications, users want web applications that look and feel like desktop applications. Ext JS is a JavaScript library that makes it (relatively) easy to create desktop-style user interfaces in a web application, including multiple windows, toolbars, drop-down menus, dialog boxes, and much more. Yet, most web developers fail to use this amazing library to its full power.</p> <p>This book covers all of the major features of the Ext framework using interactive code and clear explanation coupled with loads of screenshots. Learning Ext JS will help you create rich, dynamic, and AJAX-enabled web applications that look good and perform beyond the expectations of your users.</p> <p>From the building blocks of the application layout, to complex dynamic Grids and Forms, this book will guide you through the basics of using Ext JS, giving you the knowledge required to create rich user experiences beyond typical web interfaces. It will provide you with the tools you need to use AJAX, by consuming server-side data directly into the many interfaces of the Ext JS component library. You will also learn how to use all of the Ext JS widgets and components smartly, through interactive examples.By using a series of straightforward examples backed by screenshots, Learning Ext JS 3.2 will help you create web applications that look good and perform beyond the expectations of your users.</p>
Table of Contents (22 chapters)
Learning Ext JS 3.2
Credits
About the Authors
About the Reviewers
Preface

Programming the grid


Most of the code we have written so far concerns configuring the grid to be displayed. Often, we will want the grid to do something in response to user input—interaction. One of the common interactions in a grid is to select or move the rows of data. Ext JS refers to this interaction and how it's handled as the "selection model". Let's see how to set up a selection model.

Working with cell and row selections

Ext JS grids delegate the monitoring of user interaction with the grids rows, cells, and columns to a separate selection model object. The selection model is used to determine how rows, columns, or cells are selected, and how many items can be selected at a time. This allows us to create listeners for these selection events, along with giving us a way to query which rows have been selected.

The built-in selection models are:

  • CellSelectionModel: This lets the user to select a single cell from the grid

  • RowSelectionModel: This lets the user select an entire row, or multiple...