Example usage for com.vaadin.shared.ui ValueChangeMode LAZY

Introduction

In this page you can find the example usage for com.vaadin.shared.ui ValueChangeMode LAZY.

Prototype

ValueChangeMode LAZY

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Document

On every user event, schedule a server-side event after a defined interval, cancelling the currently-scheduled event if any.

Usage

From source file:fi.jasoft.qrcode.demo.QRCodeDemo.java

License:Apache License

@Override
protected void init(VaadinRequest request) {

    VerticalLayout content = new VerticalLayout();
    content.setSizeFull();//from  ww  w  .ja v a  2  s  . co m
    setContent(content);

    Label header = new Label("QR Code Generator");
    header.setStyleName(ValoTheme.LABEL_H2);
    content.addComponent(header);

    HorizontalSplitPanel root = new HorizontalSplitPanel();
    root.setSizeFull();
    root.setSplitPosition(50, Unit.PERCENTAGE);
    root.setLocked(true);

    Panel panel = new Panel(root);
    panel.setSizeFull();
    content.addComponent(panel);
    content.setExpandRatio(panel, 1);

    VerticalLayout first = new VerticalLayout();
    first.setSizeFull();
    root.setFirstComponent(first);

    first.addComponent(
            new HorizontalLayout(createPrimaryColorSelect(), createSecondaryColorSelect(), createSizeSelect()));

    code = new QRCode();
    code.setWidth("100px");
    code.setHeight("100px");

    final TextArea text = new TextArea("Text embedded in QR Code");
    text.setPlaceholder("Type the message of the QR code here");
    text.setSizeFull();
    text.setValueChangeMode(ValueChangeMode.LAZY);
    text.addValueChangeListener(e -> {
        code.setValue(e.getValue());
    });

    first.addComponent(text);
    first.setExpandRatio(text, 1);

    VerticalLayout vl = new VerticalLayout();
    vl.setSizeFull();

    vl.addComponent(code);
    vl.setComponentAlignment(code, Alignment.MIDDLE_CENTER);

    root.setSecondComponent(vl);
}

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From source file:my.vaadin.app.MyUI.java

@Override
protected void init(VaadinRequest vaadinRequest) {
    final VerticalLayout layout = new VerticalLayout();

    filterText.setPlaceholder("filter by name...");
    filterText.addValueChangeListener(e -> updateList());
    filterText.setValueChangeMode(ValueChangeMode.LAZY);

    Button clearFilterTextBtn = new Button(FontAwesome.TIMES);
    clearFilterTextBtn.setDescription("Clear the current filter");
    clearFilterTextBtn.addClickListener(e -> filterText.clear());

    CssLayout filtering = new CssLayout();
    filtering.addComponents(filterText, clearFilterTextBtn);
    filtering.setStyleName(ValoTheme.LAYOUT_COMPONENT_GROUP);

    Button addCustomerBtn = new Button("Add new customer");
    addCustomerBtn.addClickListener(e -> {
        grid.asSingleSelect().clear();/*from   w  ww  .  j av  a 2 s.  c om*/
        form.setCustomer(new Customer());
    });

    HorizontalLayout toolbar = new HorizontalLayout(filtering, addCustomerBtn);

    grid.setColumns("firstName", "lastName", "email");

    HorizontalLayout main = new HorizontalLayout(grid, form);
    main.setSizeFull();
    grid.setSizeFull();
    main.setExpandRatio(grid, 1);

    layout.addComponents(toolbar, main);

    // fetch list of Customers from service and assign it to Grid
    updateList();

    setContent(layout);

    form.setVisible(false);

    grid.asSingleSelect().addValueChangeListener(event -> {
        if (event.getValue() == null) {
            form.setVisible(false);
        } else {
            form.setCustomer(event.getValue());
        }
    });
}

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