Java Code Examples for com.vaadin.flow.component.button.Button#addClickListener()

private void addSimpleStringDemo() {
    MultiselectComboBox<String> multiselectComboBox = new MultiselectComboBox();
    multiselectComboBox.setLabel("Multiselect combo box with string items");
    multiselectComboBox.setPlaceholder("Add");
    multiselectComboBox.setWidth("100%");
    multiselectComboBox.setItems("Item 1", "Item 2", "Item 3", "Item 4");
    multiselectComboBox.addSelectionListener(
            event -> Notification.show(event.toString()));

    Button getValueBtn = new Button("Get value");
    getValueBtn.addClickListener(
            event -> multiselectComboBoxValueChangeHandler(
                    multiselectComboBox));

    add(buildDemoContainer(multiselectComboBox, getValueBtn));
}
 

private void addObjectDemo() {
    MultiselectComboBox<User> multiselectComboBox = new MultiselectComboBox();
    multiselectComboBox.setLabel("Multiselect combo box with object items");
    multiselectComboBox.setPlaceholder("Add");
    multiselectComboBox.setWidth("100%");
    List<User> data = Arrays.asList(
            new User("Leanne Graham", "leanne", "[email protected]"),
            new User("Ervin Howell", "ervin", "[email protected]"),
            new User("Samantha Doe", "samantha", "[email protected]"));
    multiselectComboBox.setItems(data);
    multiselectComboBox.addSelectionListener(
            event -> Notification.show(event.toString()));

    Button getValueBtn = new Button("Get value");
    getValueBtn.addClickListener(
            event -> objectMultiselectComboBoxValueChangeHandler(
                    multiselectComboBox));

    add(buildDemoContainer(multiselectComboBox, getValueBtn));
}
 

private void addObjectDemoWithLabelGenerator() {
    MultiselectComboBox<User> multiselectComboBox = new MultiselectComboBox();
    multiselectComboBox.setLabel(
            "Multiselect combo box with object items and custom item label generator");
    multiselectComboBox.setPlaceholder("Add");
    multiselectComboBox.setWidth("100%");
    List<User> data = Arrays.asList(
            new User("Leanne Graham", "leanne", "[email protected]"),
            new User("Ervin Howell", "ervin", "[email protected]"),
            new User("Samantha Doe", "samantha", "[email protected]"));
    multiselectComboBox.setItems(data);
    multiselectComboBox.setItemLabelGenerator(User::getEmail);
    multiselectComboBox.addSelectionListener(
            event -> Notification.show(event.toString()));

    Button getValueBtn = new Button("Get value");
    getValueBtn.addClickListener(
            event -> objectMultiselectComboBoxValueChangeHandler(
                    multiselectComboBox));

    add(buildDemoContainer(multiselectComboBox, getValueBtn));
}
 

private void addRequiredDemo() {
    MultiselectComboBox<String> multiselectComboBox = new MultiselectComboBox();
    multiselectComboBox.setLabel("Required multiselect combo box");
    multiselectComboBox.setPlaceholder("Add");
    multiselectComboBox.setWidth("100%");
    multiselectComboBox.setRequired(true);
    multiselectComboBox.setErrorMessage("The field is mandatory");
    multiselectComboBox.setItems("Item 1", "Item 2", "Item 3", "Item 4");
    multiselectComboBox.addSelectionListener(
            event -> Notification.show(event.toString()));

    Button getValueBtn = new Button("Get value");
    getValueBtn.addClickListener(
            event -> multiselectComboBoxValueChangeHandler(
                    multiselectComboBox));

    add(buildDemoContainer(multiselectComboBox, getValueBtn));
}
 

private void addCompactModeDemo() {
    MultiselectComboBox<String> multiselectComboBox = new MultiselectComboBox();
    multiselectComboBox.setLabel("Multiselect combo box in compact mode");
    multiselectComboBox.setPlaceholder("Add");
    multiselectComboBox.setWidth("100%");
    multiselectComboBox.setItems("Item 1", "Item 2", "Item 3", "Item 4");
    multiselectComboBox.addSelectionListener(
            event -> Notification.show(event.toString()));

    multiselectComboBox.setCompactMode(true);

    Button getValueBtn = new Button("Get value");
    getValueBtn.addClickListener(
            event -> multiselectComboBoxValueChangeHandler(
                    multiselectComboBox));

    add(buildDemoContainer(multiselectComboBox, getValueBtn));
}
 

private void addOrderedDemo() {
    MultiselectComboBox<String> multiselectComboBox = new MultiselectComboBox();
    multiselectComboBox.setLabel(
            "Multiselect combo box with ordered selected items list");
    multiselectComboBox.setPlaceholder("Add");
    multiselectComboBox.setWidth("100%");
    multiselectComboBox.setItems("Item 1", "Item 2", "Item 3", "Item 4");
    multiselectComboBox.addSelectionListener(
            event -> Notification.show(event.toString()));

    multiselectComboBox.setOrdered(true);

    Button getValueBtn = new Button("Get value");
    getValueBtn.addClickListener(
            event -> multiselectComboBoxValueChangeHandler(
                    multiselectComboBox));

    add(buildDemoContainer(multiselectComboBox, getValueBtn));
}
 

private void addLazyLoadingDemo() {
    MultiselectComboBox<String> multiselectComboBox = new MultiselectComboBox();
    multiselectComboBox.setLabel("Multiselect with lazy loading");
    multiselectComboBox.setPlaceholder("Add");
    multiselectComboBox.setWidth("100%");

    List<String> items =IntStream.range(1, 10000).mapToObj(num -> "Item " + num).collect(Collectors.toList());
    multiselectComboBox.setItems(items);

    multiselectComboBox.addSelectionListener(
            event -> Notification.show(event.toString()));

    Button getValueBtn = new Button("Get value");
    getValueBtn.addClickListener(
            event -> multiselectComboBoxValueChangeHandler(
                    multiselectComboBox));

    add(buildDemoContainer(multiselectComboBox, getValueBtn));
}
 

private void addClearButtonVisibleDemo() {
    MultiselectComboBox<String> multiselectComboBox = new MultiselectComboBox();
    multiselectComboBox.setLabel("Multiselect combo box with `clear-button-visible`");
    multiselectComboBox.setPlaceholder("Add");
    multiselectComboBox.setWidth("100%");
    multiselectComboBox.setItems("Item 1", "Item 2", "Item 3", "Item 4");
    multiselectComboBox.addSelectionListener(
            event -> Notification.show(event.toString()));

    multiselectComboBox.setClearButtonVisible(true);

    Button getValueBtn = new Button("Get value");
    getValueBtn.addClickListener(
            event -> multiselectComboBoxValueChangeHandler(
                    multiselectComboBox));

    add(buildDemoContainer(multiselectComboBox, getValueBtn));
}
 

private void addAllowCustomValuesDemo() {
    MultiselectComboBox<String> multiselectComboBox = new MultiselectComboBox();
    multiselectComboBox.setLabel("Allow custom values");
    multiselectComboBox.setPlaceholder("Select existing or input custom value");
    multiselectComboBox.setWidth("100%");
    List<String> items = Arrays.asList("Java", "Go", "Python", "C#");
    multiselectComboBox.setItems(items);

    multiselectComboBox.addCustomValuesSetListener(e -> {
        Set<String> existingSelected = multiselectComboBox.getValue().stream().collect(Collectors.toSet());
        existingSelected.add(e.getDetail());
        List<String> updatedItems = multiselectComboBox.getDataProvider().fetch(new Query<>()).collect(Collectors.toList());
        updatedItems.add(e.getDetail());
        multiselectComboBox.setItems(updatedItems);
        multiselectComboBox.setValue(existingSelected);
    });

    Button getValueBtn = new Button("Get value");
    getValueBtn.addClickListener(
        event -> multiselectComboBoxValueChangeHandler(
            multiselectComboBox));

    add(buildDemoContainer(multiselectComboBox, getValueBtn));
}
 

public void addTemplateRendererDemo() {
    MultiselectComboBox<User> multiselectComboBox = new MultiselectComboBox();
    multiselectComboBox.setLabel(
        "Multiselect combo box with TemplateRenderer");
    multiselectComboBox.setPlaceholder("Add");
    multiselectComboBox.setWidth("100%");
    List<User> data = Arrays.asList(
        new User("Leanne Graham", "leanne", "[email protected]"),
        new User("Ervin Howell", "ervin", "[email protected]"),
        new User("Samantha Doe", "samantha", "[email protected]"));
    multiselectComboBox.setItems(data);
    multiselectComboBox.setItemLabelGenerator(User::getEmail);
    multiselectComboBox.addSelectionListener(
        event -> Notification.show(event.toString()));

    Button getValueBtn = new Button("Get value");
    getValueBtn.addClickListener(
        event -> objectMultiselectComboBoxValueChangeHandler(
            multiselectComboBox));

    multiselectComboBox.setRenderer(
        TemplateRenderer.<User>of("<div>[[item.username]]<br/><small>[[item.email]]</small><br/><small>[[item.name]]<small></div>")
            .withProperty("name", User::getName)
            .withProperty("email", User::getEmail)
            .withProperty("username", User::getUsername));

    add(buildDemoContainer(multiselectComboBox, getValueBtn));
}
 

public void addComponentRendererDemo() {
    MultiselectComboBox<User> multiselectComboBox = new MultiselectComboBox();
    multiselectComboBox.setLabel(
        "Multiselect combo box with ComponentRenderer");
    multiselectComboBox.setPlaceholder("Add");
    multiselectComboBox.setWidth("100%");
    List<User> data = Arrays.asList(
        new User("Leanne Graham", "leanne", "[email protected]"),
        new User("Ervin Howell", "ervin", "[email protected]"),
        new User("Samantha Doe", "samantha", "[email protected]"));
    multiselectComboBox.setItems(data);
    multiselectComboBox.setItemLabelGenerator(User::getEmail);
    multiselectComboBox.addSelectionListener(
        event -> Notification.show(event.toString()));

    Button getValueBtn = new Button("Get value");
    getValueBtn.addClickListener(
        event -> objectMultiselectComboBoxValueChangeHandler(
            multiselectComboBox));

    multiselectComboBox.setRenderer(new ComponentRenderer<VerticalLayout, User>(VerticalLayout::new, (container, user) -> {
        HorizontalLayout name = new HorizontalLayout(new Icon(VaadinIcon.USER), new Label(user.getName()));
        HorizontalLayout email = new HorizontalLayout(new Icon(VaadinIcon.SUITCASE), new Label(user.getEmail()));
        container.add(name, email);
    }));

    add(buildDemoContainer(multiselectComboBox, getValueBtn));
}
 

protected Button buildOperationButton(CrudOperation operation, T domainObject, ComponentEventListener<ClickEvent<Button>> clickListener) {
    if (clickListener == null) {
        return null;
    }

    String caption = buttonCaptions.get(operation);
    Icon icon = buttonIcons.get(operation);
    Button button = icon != null ? new Button(caption, icon) : new Button(caption);
    if (buttonStyleNames.containsKey(operation)) {
        buttonStyleNames.get(operation).stream().filter(styleName -> styleName != null).forEach(styleName -> button.addClassName(styleName));
    }
    if (buttonThemes.containsKey(operation)) {
        button.getElement().setAttribute("theme", buttonThemes.get(operation));
    }

    button.addClickListener(event -> {
        if (binder.writeBeanIfValid(domainObject)) {
            try {
                clickListener.onComponentEvent(event);
            } catch (Exception e) {
                showError(operation, e);
            }
        } else {
            Notification.show(validationErrorMessage);
        }
    });
    return button;
}
 

SetAcctStopTimeDialog(UpdateListener<AccountingDto> updateListener) {
    VerticalLayout verticalLayout = new VerticalLayout();
    verticalLayout.setPadding(false);
    verticalLayout.setMargin(false);

    timestampField = new TextField("Timestamp");
    timestampField.setErrorMessage("Timestamp number is required");
    timestampField.setValueChangeMode(ValueChangeMode.EAGER);
    timestampField.addValueChangeListener(event -> isValid(event.getValue()));

    checkboxNow = new Checkbox("Now");
    Button setBtn = new Button("Set");
    Button cancelBtn = new Button("Cancel", event -> setOpened(false));

    checkboxNow.addValueChangeListener(event -> {
        if (event.getValue()) {
            timestampField.setValue(String.valueOf(Instant.now().getEpochSecond()));
        }
        timestampField.setEnabled(!event.getValue());
    });
    timestampField.addValueChangeListener(event -> setBtn.setEnabled(Objects.nonNull(event.getValue())));

    setBtn.setEnabled(false);
    setBtn.addClickListener(event -> {
        if (isValid(timestampField.getValue())) {
            try {
                long timestamp = Long.valueOf(timestampField.getValue());
                AccountingDto updatedAccountingDto = accountingService.setAcctStopTime(accountingDto,
                        new Date(timestamp * 1000));
                updateListener.onUpdated(this, updatedAccountingDto);
                setOpened(false);
            } catch (NotFoundException e) {
                e.printStackTrace();
            }
        }
    });

    HorizontalLayout controls = new HorizontalLayout();
    controls.add(cancelBtn, setBtn);
    verticalLayout.add(new H3("Set Acct Stop Time"), timestampField, checkboxNow, new Hr(), controls);
    verticalLayout.setHorizontalComponentAlignment(Alignment.END, controls);
    add(verticalLayout);

}