Questions and answers

What is Store in Ext js?

What is Store in Ext js?

Summary. The Store class encapsulates a client side cache of objects. Stores load data via a, and also provide functions for sorting, filtering and querying the instances contained within it.

What is model in Extjs?

A Model or Entity represents some object that your application manages. For example, one might define a Model for Users, Products, Cars, or other real-world object that we want to model in the system. Models are used by Ext. data. Store, which are in turn used by many of the data-bound components in Ext.

How do I create a grid in Extjs?

create(‘Ext. grid. Panel’, { store: { fields: [‘name’, ’email’, ‘phone’], sorters: [‘name’, ‘phone’] }, columns: [ { text: ‘Name’, dataIndex: ‘name’ }, { text: ‘Email’, dataIndex: ’email’ } ] }); Sorting at run time is easily accomplished by simply clicking each column header.

What is Sencha JS?

Sencha Ext JS is the most comprehensive JavaScript framework for building data-intensive, cross-platform web and mobile applications for any modern device. Ext JS includes 140+ pre-integrated and tested high-performance UI components.

What is Ext getCmp?

getCmp is especially considered bad “code smell”. You should strive to organize your code in such a way that you don’t need them. Component queries are elegant, but you should use them either from a parent container (thus reducing the research tree and allowing you to leverage relative itemId ), or from a controller.

What is proxy in Extjs?

Proxy is used by Models and Stores to handle the loading and saving of Model data. There are two types of proxies. Client Proxy. Server Proxy.

What creates ext?

JavaScript allows us to create an object using new keyword. However, Sencha recommends to use Ext. create() method to create an object of a class which is created using Ext. define() method. The following example demonstrates creating an object of the Student class and calling getName() method.

What is Grid panel?

A Grid panel provides a flexible area which consists of rows and columns. In a Grid, child elements can be arranged in a tabular form. Elements can be added to any specific row and column by using the Grid.

What is dataIndex in ExtJS?

dataIndex: The dataIndex is the field in the underlying Ext. data. Store to use as the value for the column. renderer: Allows the underlying store value to be transformed before being displayed in the grid.

Is ExtJS dead?

IMHO, the need in jQuery, ExtJS etc. will be eliminated as soon as XBL2, entire collection of CSS3 specifications, SVG and HTML5 all get available in an equal extent across all desktop/mobile web-browsers, which is not going to hapen within coming 5 years.

What are the powerful part of the Ext JS framework?

Ext JS 5.0 It includes the ability to build desktop apps on touch-enabled devices—using a single code base, a Model View ViewModel (MVVM) architecture, two-way data binding, responsive layouts, and other component upgrades with support for adding widgets inside a grid cell for data visualization and big data analytics.

How do we add a tooltip to any component in Ext JS?

new BoxComponent({ qtip: “This is a tip”, listeners: { rendered: function(c){ Ext. QuickTips. register({ target: c. getEl(), text: c.

How does the class work?

The Store class encapsulates a client side cache of objects. Stores load data via a, and also provide functions for sorting, filtering and querying the instances contained within it. Creating a Store is easy – we just tell it the Model and the Proxy to use for loading and saving its data:

How to create a context menu in extjs4?

The only code I’ve removed is the one that was related to Grid and added a line that will remove our DIV element from DOM (document object model) Now lets bind contextmenu event to our DIV, this is done so that when user right clicks on our DIV a context menu is shown. That’s pretty much it.

How to get all records in

Use getData (). getSource () to fetch all unfiltered records. An Ext.util.Collection of records (an empty Collection if no records are held by the store). Loads an array of data directly into the Store. setData () is ideal if your data’s format is already in its appropriate format (e.g. it doesn’t need to be processed by a reader).

How are stores sorted in ext.util.collection?

Stores can be sorted and filtered – in both cases either remotely or locally. The cfg-sorters and cfg-filters are held inside Ext.util.Collection instances to make them easy to manage. Usually it is sufficient to either just specify sorters and filters in the Store configuration or call method-sort or filter: