com.google.gwt.sample.contacts.client.presenter.EditContactPresenter.java Source code

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Here is the source code for com.google.gwt.sample.contacts.client.presenter.EditContactPresenter.java

Source

package com.google.gwt.sample.contacts.client.presenter;

import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.dom.client.HasClickHandlers;
import com.google.gwt.event.shared.HandlerManager;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.HasValue;
import com.google.gwt.user.client.ui.HasWidgets;
import com.google.gwt.user.client.ui.Widget;
import com.google.gwt.user.client.Window;
import com.google.gwt.sample.contacts.client.ContactsServiceAsync;
import com.google.gwt.sample.contacts.client.event.ContactUpdatedEvent;
import com.google.gwt.sample.contacts.client.event.EditContactCancelledEvent;
import com.google.gwt.sample.contacts.shared.Contact;

public class EditContactPresenter implements Presenter {
    public interface Display {
        HasClickHandlers getSaveButton();

        HasClickHandlers getCancelButton();

        HasValue<String> getFirstName();

        HasValue<String> getLastName();

        HasValue<String> getEmailAddress();

        Widget asWidget();
    }

    private Contact contact;
    private final ContactsServiceAsync rpcService;
    private final HandlerManager eventBus;
    private final Display display;

    public EditContactPresenter(ContactsServiceAsync rpcService, HandlerManager eventBus, Display display) {
        this.rpcService = rpcService;
        this.eventBus = eventBus;
        this.contact = new Contact();
        this.display = display;
        bind();
    }

    public EditContactPresenter(ContactsServiceAsync rpcService, HandlerManager eventBus, Display display,
            String id) {
        this.rpcService = rpcService;
        this.eventBus = eventBus;
        this.display = display;
        bind();

        rpcService.getContact(id, new AsyncCallback<Contact>() {
            public void onSuccess(Contact result) {
                contact = result;
                EditContactPresenter.this.display.getFirstName().setValue(contact.getFirstName());
                EditContactPresenter.this.display.getLastName().setValue(contact.getLastName());
                EditContactPresenter.this.display.getEmailAddress().setValue(contact.getEmailAddress());
            }

            public void onFailure(Throwable caught) {
                Window.alert("Error retrieving contact");
            }
        });

    }

    public void bind() {
        this.display.getSaveButton().addClickHandler(new ClickHandler() {
            public void onClick(ClickEvent event) {
                doSave();
            }
        });

        this.display.getCancelButton().addClickHandler(new ClickHandler() {
            public void onClick(ClickEvent event) {
                eventBus.fireEvent(new EditContactCancelledEvent());
            }
        });
    }

    public void go(final HasWidgets container) {
        container.clear();
        container.add(display.asWidget());
    }

    private void doSave() {
        contact.setFirstName(display.getFirstName().getValue());
        contact.setLastName(display.getLastName().getValue());
        contact.setEmailAddress(display.getEmailAddress().getValue());

        rpcService.updateContact(contact, new AsyncCallback<Contact>() {
            public void onSuccess(Contact result) {
                eventBus.fireEvent(new ContactUpdatedEvent(result));
            }

            public void onFailure(Throwable caught) {
                Window.alert("Error updating contact");
            }
        });
    }

}