Source Viewer : WEB-INF/classes/org/apache/click/examples/page/ajax/select/AjaxSelect.java

package org.apache.click.examples.page.ajax.select;

import java.util.ArrayList;
import java.util.List;

import java.util.Map;
import javax.annotation.Resource;

import org.apache.click.Context;
import org.apache.click.ActionResult;
import org.apache.click.control.Option;
import org.apache.click.control.Select;
import org.apache.click.dataprovider.DataProvider;
import org.apache.click.element.Element;
import org.apache.click.element.JsImport;
import org.apache.click.element.JsScript;
import org.apache.click.examples.control.ajax.CustomerPanel;
import org.apache.click.examples.domain.Customer;
import org.apache.click.examples.page.BorderPage;
import org.apache.click.examples.service.CustomerService;
import org.apache.click.util.ClickUtils;
import org.springframework.stereotype.Component;

/**
 * Provides an Ajax select example Page.
 */
@Component
public class AjaxSelect extends BorderPage {

    private static final long serialVersionUID = 1L;

    private Select customerSelect = new Select("customerSelect");

    @Resource(name="customerService")
    private CustomerService customerService;

    // Constructors -----------------------------------------------------------

    public AjaxSelect() {
        addControl(customerSelect);
    }

    // Event Handlers ---------------------------------------------------------

    // A pageAction that handles Ajax requests for a particular customer
    public ActionResult onChangeCustomer() {
        ActionResult actionResult = new ActionResult();

        // Lookup customer based on request parameter 'customerId'
        String customerId = getContext().getRequest().getParameter("customerId");
        Customer customer = customerService.findCustomerByID(customerId);

        // CustomerPanel will render the customer as an HTML snippet
        CustomerPanel customerPanel = new CustomerPanel(this, customer);
        actionResult.setContent(customerPanel.toString());

        // Set content type and character encoding
        actionResult.setCharacterEncoding("UTF-8");
        actionResult.setContentType(ActionResult.HTML);

        return actionResult;
    }

    @Override
    public void onInit() {
        super.onInit();

        customerSelect.setSize(8);

        customerSelect.setDataProvider(new DataProvider() {

            public List getData() {
                List<Option> optionList = new ArrayList<Option>();
                List<Customer> customerList = customerService.getCustomersSortedByName(8);
                for (Customer customer : customerList) {
                    optionList.add(new Option(customer.getId(), customer.getName()));
                }
                return optionList;
            }
        });
    }

    @Override
    public List<Element> getHeadElements() {
        if (headElements == null) {
            headElements = super.getHeadElements();

            // Include the prototype.js library which is made available under
            // the web folder "/click/prototype/"
            headElements.add(new JsImport("/click/prototype/prototype.js"));

            Context context = getContext();

            // Create a model to pass to the Page JavaScript template. The
            // template recognizes the following Velocity variables:
            // $context, $path, $selector and $target
            Map<String, Object> model = ClickUtils.createTemplateModel(this, context);

            // Add a CSS selector, in this case the customerSelect ID attribute
            model.put("selector", customerSelect.getId());

            // Add the ID of a target element in the Page template to replace
            // with new data, in this example the target is 'customerDetails'
            model.put("target", "customerDetails");

            // Include the Page associated JavaScript template
            headElements.add(new JsScript("/ajax/select/ajax-select.js", model));
        }

        return headElements;
    }
}