In Ext JS 3, we still had to declare a grouping field in the store; but, instead of a Grouping feature, we used to declare Grouping View, as follows: If we execute the grouping grid, we will get the following output: The Grouping Summary feature also groups rows with a field in common, but it also adds a summary row at the bottom of each group.
Let's change the preceding example to use the Grouping Summary feature: We highlighted two pieces in the preceding code.
Panel * * Aggregates Grid Sections in a layout of hbox align stretch * * Grid Scrollers will be docked here based off of the scroll configuration * * @xtype gridpanel */ Ext.define('
However, there are some changes related to plugins and the new features property.Each token must be unique and must increment in the format , , and so on. gute dating seiten Leipzig The preceding code will output the following grid: The Grouping Summary feature adds a row at the bottom of each grouping.The following code displays a grid grouped by book topic: In the group Header Tpl attribute, we declared a template to be displayed in the grouping row.We are going to display one of the following customized strings, depending on the number of books belonging to the topic: The string comprises of the topic name () and the count of the book for the topic ().
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Other summary types we can declare are: sum, min, max, average (these are self-explanatory).In this example, we want to customize the text that will be displayed in the summary, so we are going to use the summary Renderer function.The first line is the feature declaration: in the previous example (Grouping) we created the feature using the Ext.create declaration.But if we do not want to explicitly create the feature every time we declare, we can use the ftype property, which is groupingsummary in this example.We are going to take a closer look at that in this section. Ext JS 4 organizes all the column classes into a single package—the column package.
We will explain how to use each column type with an example. Feature class that contains common methods and properties to create a plugin.
Sencha calls this new feature Intelligent Rendering.
Ext JS 3 used to create the whole structure, supporting all the features.
Ext JS 4 now renders only the features the grid uses, minimizing and boosting the performance.
Before we examine the grid's new features and enhancements, let's take a look how to implement a simple grid in Ext JS 4: As you can see in the preceding code, the two main parts of the grid are the store and the columns declarations.