magento 2 ui how to get values from grid in modal to display in a div - magento2

Question

Below is code i use to create a form with a link that opens a modal with a customer grid, the user selects the customers and when the form is submitted the customers are sent with the posted data to the controller which all works.
What i'm struggling to work out is that once the modal is closed and customers are selected, how would i display the names of the selected customers in a div above the form? Right now they are hidden so it's not obvious what has been selected before the form is submitted:
<?xml version="1.0" encoding="UTF-8"?>
<form xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Ui:etc/ui_configuration.xsd">
<argument name="data" xsi:type="array">
<item name="js_config" xsi:type="array">
<item name="provider" xsi:type="string">
pillbox_textmessaging_campaigns_add_form.campaigns_add_form_data_source
</item>
<item name="deps" xsi:type="string">
pillbox_textmessaging_campaigns_add_form.campaigns_add_form_data_source
</item>
</item>
<item name="label" xsi:type="string" translate="true">Add New Campaign</item>
<item name="config" xsi:type="array">
<item name="dataScope" xsi:type="string">data</item>
<item name="namespace" xsi:type="string">pillbox_textmessaging_campaigns_add_form</item>
</item>
<item name="template" xsi:type="string">templates/form/collapsible</item>
<item name="buttons" xsi:type="array">
<item name="save" xsi:type="string">Pillbox\TextMessaging\Block\Adminhtml\Campaigns\Buttons\Save</item>
</item>
</argument>
<dataSource name="campaigns_add_form_data_source">
<argument name="dataProvider" xsi:type="configurableObject">
<argument name="class" xsi:type="string">Pillbox\TextMessaging\Model\Campaigns\FormDataProvider</argument>
<argument name="name" xsi:type="string">campaigns_add_form_data_source</argument>
<argument name="primaryFieldName" xsi:type="string">id</argument>
<argument name="requestFieldName" xsi:type="string">id</argument>
<argument name="data" xsi:type="array">
<item name="config" xsi:type="array">
<item name="submit_url" xsi:type="url" path="*/*/save"/>
</item>
</argument>
</argument>
<argument name="data" xsi:type="array">
<item name="js_config" xsi:type="array">
<item name="component" xsi:type="string">Magento_Ui/js/form/provider</item>
</item>
</argument>
</dataSource>
<fieldset name="campaign_information">
<argument name="data" xsi:type="array">
<item name="config" xsi:type="array">
<item name="collapsible" xsi:type="boolean">false</item>
<item name="label" xsi:type="string" translate="true">Campaign Information</item>
<item name="sortOrder" xsi:type="number">10</item>
</item>
</argument>
<modal name="customers_modal">
<argument name="data" xsi:type="array">
<item name="config" xsi:type="array">
<item name="onCancel" xsi:type="string">
actionDone
</item>
<item name="options" xsi:type="array">
<item name="title" xsi:type="string">
All Customers
</item>
<item name="buttons" xsi:type="array">
<item name="0" xsi:type="array">
<item name="text" xsi:type="string">
Selected
</item>
<item name="class" xsi:type="string">
action-primary
</item>
<item name="actions" xsi:type="array">
<item name="0" xsi:type="array">
<item name="targetName" xsi:type="string">
index = customer_listing
</item>
<item name="actionName" xsi:type="string">save</item>
</item>
<item name="1" xsi:type="string">
closeModal
</item>
</item>
</item>
</item>
</item>
</item>
</argument>
<insertListing name="customer_listing">
<settings>
<dataLinks>
<exports>false</exports>
<imports>true</imports>
</dataLinks>
<autoRender>true</autoRender>
<selectionsProvider>
customer_listing.customer_listing.customer_columns.ids
</selectionsProvider>
<dataScope>customer_listing</dataScope>
<ns>customer_listing</ns>
</settings>
</insertListing>
</modal>
<button name="customers_button"
component="Magento_Ui/js/form/components/button">
<argument name="data" xsi:type="array">
<item name="config" xsi:type="array">
<item name="label" xsi:type="string" translate="true">
Select Customers
</item>
<item name="title" xsi:type="string" translate="true">
Customers
</item>
<item name="displayAsLink" xsi:type="boolean">true</item>
<item name="labelVisible" xsi:type="boolean">true</item>
<item name="template" xsi:type="string">
ui/form/components/button/container
</item>
<item name="actions" xsi:type="array">
<item name="0" xsi:type="array">
<item name="targetName" xsi:type="string">
pillbox_textmessaging_campaigns_add_form.pillbox_textmessaging_campaigns_add_form.campaign_information.customers_modal
</item>
<item name="actionName" xsi:type="string">
toggleModal
</item>
</item>
</item>
</item>
</argument>
</button>
<field name="name">
<argument name="data" xsi:type="array">
<item name="config" xsi:type="array">
<item name="dataType" xsi:type="string">text</item>
<item name="label" xsi:type="string" translate="true">Campaign Name</item>
<item name="formElement" xsi:type="string">input</item>
<item name="sortOrder" xsi:type="number">10</item>
<item name="validation" xsi:type="array">
<item name="required-entry" xsi:type="boolean">true</item>
</item>
</item>
</argument>
</field>
<field name="message">
<argument name="data" xsi:type="array">
<item name="config" xsi:type="array">
<item name="dataType" xsi:type="string">text</item>
<item name="label" xsi:type="string" translate="true">Message Content</item>
<item name="formElement" xsi:type="string">textarea</item>
<item name="sortOrder" xsi:type="number">20</item>
<item name="validation" xsi:type="array">
<item name="required-entry" xsi:type="boolean">true</item>
</item>
</item>
</argument>
</field>
<htmlContent name="sms_count_html_content">
<argument name="block" xsi:type="object">
Pillbox\TextMessaging\Block\Adminhtml\Shared\HtmlContent\TextFormCountHtml
</argument>
</htmlContent>
<field name="ready_to_send" formElement="checkbox">
<settings>
<label translate="true">Ready To Send?</label>
<tooltip>
<description translate="true">Check the box if you would like to send the campaign immediately.
</description>
</tooltip>
</settings>
<formElements>
<checkbox>
<settings>
<prefer>toggle</prefer>
<valueMap>
<map name="false" xsi:type="boolean">false</map>
<map name="true" xsi:type="boolean">true</map>
</valueMap>
</settings>
</checkbox>
</formElements>
</field>
</fieldset>
</form>