You can use sales/orders grid as example.
exportButton ui component responsable for UI
<exportButton name="export_button">
<argument name="data" xsi:type="array">
<item name="config" xsi:type="array">
<item name="selectProvider" xsi:type="string">sales_order_grid.sales_order_grid.sales_order_columns.ids</item>
</item>
</argument>
</exportButton>
where selectProvider is component responsible for selections data.
By default csv/xml options available and leads to \Magento\Ui\Controller\Adminhtml\Export\GridTo{Csv,Xml} action that export all selected data from data provider.
Well I spent a lot of hours looking how templates and other stuffs are related with knockout.js
, i will try to explain how subtotal price format is displayed to order summary at checkout module, but is same to other things too. My current version is Magento ver. 2.0.4.
First if you navigate to the corresponding layout file for checkout at
vendor/magento/module-checkout/view/frontend/layout/checkout_index_index.xml
you will see at line 392 inside cart_items
block the subtotal block like this:
As you can see , Magento calls a js template to display subtotal of product right after product details.
If you navigate to
vendor/magento/module-checkout/view/frontend/web/js/view/summary/subtotal.js
you will see at line 15 is called subtotal template , and a function called getValue()
,
getValue: function () {
return this.getFormattedPrice(this.getPureValue());
}
which later i saw it is called in subtotal template , which is located to
vendor/magento/module-checkout/view/frontend/web/template/summary/subtotal.html
with this code:
Subtotal.js
file uses
Magento_Checkout/view/frontend/web/js/view/summary/abstract-total.js
getFormattedPrice()
function, while this file uses
Magento_Checkout/view/frontend/web/js/model/quote.js getPriceFormat()
function read about require.js dependencies ,
which returns a price format, and here i saw that this variable is populated like this,
var priceFormat = window.checkoutConfig.priceFormat;
So where does window.checkoutConfig.priceFormat comes from?
Magento 2 did this:
If you navigate to
/vendor/magento/module-checkout/view/frontend/templates/onepage.phtml
at line 26 is initialized window.checkoutConfig with $block->getCheckoutConfig()
, which function is at
/vendor/magento/module-checkout/Block/Onepage.php
line 89, here it takes all config providers and returns them.
Where are config providers defined?
They are defined at
vendor/magento/module-checkout/etc/frontend/di.xml
at line 46, at sends us to
Magento\Checkout\Model\DefaultConfigProvider.php
which has getConfig()
function, at line 254 you can see getConfig()
function and at line 271 is priceFormat populated like this:
$output['priceFormat'] = $this->localeFormat->getPriceFormat(
null,
$this->checkoutSession->getQuote()->getQuoteCurrencyCode()
);
This means priceFormat is declared at populated here at getConfig()
function, so you can later use it with window.checkouConfig.priceFormat
.
Best Answer
That looks like Magento 2 is using Knockout.js, a MVVM framework that uses HTML data bindings (and in some cases HTML comments, like the one you found) to link model and view.
Here, this comment is a virtual element, "template" probably a custom binding from Magento (see: http://knockoutjs.com/documentation/custom-bindings-for-virtual-elements.html),
getTemplate()
obviously a JavaScript function that is responsible to render the real element(s).To understand knockout, go through their interactive tutorial at knockoutjs.com, I found it easy to grasp and the tutorial/documentation is really great.