create custom modal pop up form

ehaeick107

Hello. I would like to add a button to the customer edit form toolbar which creates a pop-up to create a record in another custom model. I would like to recreate it similar to how the record editor has a modal pop up when you try and create or edit a record. I know how to create a new button in the toolbar, but I am not sure how to display a modal pop up when the button is clicked. Any help would be appreciated! Thank you!

ehaeick107

Here is some supporting code:

I created my button using

        Event::listen('admin.toolbar.extendButtonsBefore', function (Toolbar $toolbar) {
            if ($toolbar->getController() instanceof Customers){
                $toolbar->buttons['edit_balance'] = [
                    'label' => 'Edit Balance',
                    'class' => 'btn btn-default',
                    'context' => ['edit'],
                ];
            }

        });

I know I have to create a config form to say what fields I would like to display, however those fields come from a model that is not Customers_model. Is there a function inside the Customers controller that I should write (using extend) to handle the logic to grab the custom model and the custom config file to display the form.

I see that the modal pop up in the record editor have instances of Admin/Widgets/Form. Where do I instantiate the form in my custom code?

Thank you!