的Java / Vaadin - 定制的FormLayout隐藏组件实现(Java/Vaadin

我工作在vaadin Web应用程序，我目前想实现一个地址簿。我认为官方的实现关github上，并试图构建关闭该。

我遇到的问题是与接触形式。我希望能够在网格中单击某行，并打开包含该信息的形式。（类似它是如何对他们做例子）

作为然而预期组分不发生反应。如果我直接添加该组件的主要布局，并尝试切换可见它搅乱了看法。我得到它的工作的唯一方法是通过添加和删除的组件作为其需要，虽然我不喜欢这个解决方案，也不是优雅。

这是当前实现

package com.example.ecenter.view;

import com.vaadin.data.Binder;
import com.vaadin.navigator.View;
import com.vaadin.navigator.ViewChangeListener.ViewChangeEvent;
import com.vaadin.spring.annotation.SpringComponent;
import com.vaadin.spring.annotation.SpringView;
import com.vaadin.ui.Button;
import com.vaadin.ui.FormLayout;
import com.vaadin.ui.Grid;
import com.vaadin.ui.HorizontalLayout;
import com.vaadin.ui.TextField;
import com.vaadin.ui.VerticalLayout;
import com.vaadin.ui.themes.ValoTheme;

import io.valhala.ecenter.temp.Client;

import java.util.Arrays;
import java.util.List;

@SpringView(name = AddressBookView.VIEW_NAME)
@SpringComponent
public class AddressBookView extends HorizontalLayout implements View
{
    public static final String VIEW_NAME = "Address Book";
    Grid<Client> contactList = new Grid<>(Client.class);
    private List<Client> clients = Arrays.asList(
        new Client("Sernie", "A", "123 Test St.", "test@gmail.gov", "555-555-5554"),
        new Client("Ernie", "B", "123 Test St.", "test@gmail.com", "555-555-5555"),
        new Client("Bernie", "C", "123 Test St.", "test@gmail.net", "555-555-5556"),
        new Client("Ayy", "Lmao", "123 Test St.", "test@gmail.org", "555-555-5557"),
        new Client("Dax", "E", "123 Test St.", "test@gmail.net", "555-555-5558"),
        new Client("Avorion", "F", "123 Test St.", "test@gmail.net", "555-555-5559"),
        new Client("Xanion", "G", "123 Test St.", "test@gmail.net", "555-555-5560"),
        new Client("Trinium", "H", "123 Test St.", "test@gmail.net", "555-555-5561"),
        new Client("Naonite", "I", "123 Test St.", "test@gmail.net", "555-555-5562"),
        new Client("Squillium", "J", "123 Test St.", "test@gmail.net", "555-555-5563"),
        new Client("Picard", "K", "123 Test St.", "test@gmail.net", "555-555-5564"),
        new Client("Richard", "L", "123 Test St.", "test@gmail.net", "555-555-5565"),
        new Client("Rickard", "M", "123 Test St.", "test@gmail.net", "555-555-5566"),
        new Client("Bobby", "N", "123 Test St.", "test@gmail.net", "555-555-5567"),
        new Client("Bob", "O", "123 Test St.", "test@gmail.net", "555-555-5568"),
        new Client("Ron", "P", "123 Test St.", "test@gmail.net", "555-555-5569"),
        new Client("Bill", "Q", "123 Test St.", "test@gmail.net", "555-555-5570"),
        new Client("Greg", "R", "123 Test St.", "test@gmail.net", "555-555-5571"),
        new Client("Juan", "S", "123 Test St.", "test@gmail.net", "555-555-5572"),
        new Client("Squidward", "T", "123 Test St.", "test@gmail.net", "555-555-5573"));

private ContactForm contactForm = new ContactForm();
private TextField filter = new TextField();
private Button addContact = new Button("New Client");

public AddressBookView()
{
    initConfig();
    buildLayout();
}

private void buildLayout() 
{
    HorizontalLayout actionBar = new HorizontalLayout(filter, addContact);
    actionBar.setWidth("100%");
    filter.setWidth("100%");
    actionBar.setExpandRatio(filter, 1);

    VerticalLayout left = new VerticalLayout(actionBar, contactList);
    left.setSizeFull();
    contactList.setSizeFull();
    left.setExpandRatio(contactList, 1);

    HorizontalLayout mainLayout = new HorizontalLayout(left);
    mainLayout.setSizeFull();
    mainLayout.setExpandRatio(left, 1);

    //HorizontalLayout test = new HorizontalLayout(contactForm);
    addComponent(mainLayout);

    //addComponent(test);
    /*
     * even using a different layout still messes it up
     */

    //contactForm.setVisible(false);
}

private void initConfig() 
{
    addContact.addClickListener(event -> 
    {
        addComponent(contactForm);
        contactForm.setClient(new Client());
    });

    filter.setPlaceholder("Search clients...");
    addContact.addStyleName(ValoTheme.BUTTON_PRIMARY);
    //filter.addValueChangeListener(e -> refreshContacts(e.getText()));

    contactList.setSelectionMode(Grid.SelectionMode.SINGLE);
    contactList.setColumns("firstName", "lastName");
    contactList.setItems(clients);

    contactList.asSingleSelect().addValueChangeListener(event -> 
    {
        if(event.getValue() == null)
        {
            removeComponent(contactForm); //quick and dirty workaround
        }
        else
        {
            addComponent(contactForm); //quick and dirty workaround
            /* contactForm.setVisible(true); messes up the entire view */
            contactForm.setClient(event.getValue());
        }
    });
}

@Override
public void enter(ViewChangeEvent event) {
}

private class ContactForm extends FormLayout
{
    private Client client;
    private Button save, delete, cancel;
    private TextField firstName, lastName, email, address, phoneNumber;
    private Binder<Client> binder = new Binder<>(Client.class);
    public ContactForm()
    {
        initConf();
        initLayout();
        setSizeUndefined();
        binder.bindInstanceFields(this);
    }

    public void initConf() 
    {
        save = new Button("Save");
        cancel = new Button("Cancel");

        firstName = new TextField();
        firstName.setPlaceholder("First Name");

        lastName = new TextField();
        lastName.setPlaceholder("Last Name");

        email = new TextField();
        email.setPlaceholder("Email Address");

        address = new TextField();
        address.setPlaceholder("Address");

        phoneNumber = new TextField();
        phoneNumber.setPlaceholder("Phone Number");

    }
    public void initLayout() 
    {
        HorizontalLayout actions = new HorizontalLayout(save, cancel);
        actions.setSpacing(true);

        addComponents(actions, firstName, lastName, email, address, phoneNumber);
    }

    public void setClient(Client client)
    {
        //setVisible(true);
        this.client = client;
        binder.setBean(client);
    }
  }
}

第一个图像显示的观点添加的形式的布局和其设置为隐藏时如何反应。

所述第二和第三图像示出如何视图应反应。虽然达到了预期的效果，我不得不做马虎编码。

最后的问题是：

我怎样才能解决这个问题？我一直在使用一个内部类的形式和创造作为自己的阶级尝试。我唯一的猜测是，在github上实现它们传递UI这种形式在地址簿，而不是延伸的是一个组成部分UI。

会发生什么事，是你诡计留下大小为您的观点（这是一个水平布局）未定义并设置大小以全加隐藏相结合的形式有一个奇怪的结果。因此，如果你检查使用一些开发工具所产生的元素，你会看到你的观点（水平布局）将有147px和电网表包装的高度将有24px的高度：

如果你要你的看法高度设置为100％，那么这将扩大到占据所有可用空间，这可能不是你想要的：

所以，刚刚离开的left大小不确定，而失去mainLayout （你的看法已经延伸HorizontalLayout所以只使用），并返回到使用contactForm.setVisible(true/false) 。这样， left布局将扩大，以适应任何大小为操作栏+网格计算：

private void buildLayout() {
    HorizontalLayout actionBar = new HorizontalLayout(filter, addContact);
    actionBar.setWidth("100%");
    filter.setWidth("100%");
    actionBar.setExpandRatio(filter, 1);

    VerticalLayout left = new VerticalLayout(actionBar, contactList);
    left.setSizeFull();
    left.setExpandRatio(contactList, 1);

    addComponents(left, contactForm);
    contactForm.setVisible(false);
}