com.vaadin.flow.component.menubar

Class MenuBar

java.lang.Object

com.vaadin.flow.component.Component

com.vaadin.flow.component.menubar.MenuBar

All Implemented Interfaces:

AttachNotifier, HasMenuItems, DetachNotifier, HasElement, HasSize, HasStyle, HasTheme, Serializable

@Tag(value="vaadin-menu-bar")
 @NpmPackage(value="@vaadin/polymer-legacy-adapter",version="22.1.0") @NpmPackage(value="@vaadin/menu-bar",version="22.1.0") @NpmPackage(value="@vaadin/vaadin-menu-bar",version="22.1.0")
 @JsModule(value="@vaadin/polymer-legacy-adapter/style-modules.js") @JsModule(value="./menubarConnector.js") @JsModule(value="@vaadin/menu-bar/src/vaadin-menu-bar.js")
public class MenuBar
extends Component
implements HasMenuItems, HasSize, HasStyle, HasTheme

Server-side component for the vaadin-menu-bar element.

Author:

Vaadin Ltd

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	MenuBar.MenuBarI18n The internationalization properties for MenuBar

Constructor Summary

Constructors

Constructor and Description
MenuBar() Creates an empty menu bar component.

Method Summary

Modifier and Type	Method and Description
MenuItem	addItem(Component component) Creates a new MenuItem component and adds it to the root level of this menu bar.
MenuItem	addItem(Component component, ComponentEventListener<ClickEvent<MenuItem>> clickListener) Creates a new MenuItem component with the provided click listener and adds it to the root level of this menu bar.
MenuItem	addItem(String text) Creates a new MenuItem component with the provided text content and adds it to the root level of this menu bar.
MenuItem	addItem(String text, ComponentEventListener<ClickEvent<MenuItem>> clickListener) Creates a new MenuItem component with the provided text content and click listener and adds it to the root level of this menu bar.
void	addThemeVariants(MenuBarVariant... variants) Adds theme variants to the component.
Stream<Component>	getChildren() Gets the child components of this menu bar.
MenuBar.MenuBarI18n	getI18n() Gets the internationalization object previously set for this component.
List<MenuItem>	getItems() Gets the MenuItem components added to the root level of the menu bar.
boolean	isOpenOnHover() Gets whether the sub menus open by clicking or hovering on the root level buttons.
protected void	onAttach(AttachEvent attachEvent) Called when the component is attached to a UI.
void	remove(MenuItem... items) Removes the given item components from this menu bar.
void	removeAll() Removes all item components from this menu bar.
void	removeThemeVariants(MenuBarVariant... variants) Removes theme variants from the component.
void	setI18n(MenuBar.MenuBarI18n i18n) Sets the internationalization properties for this component.
void	setOpenOnHover(boolean openOnHover) Sets the event which opens the sub menus of the root level buttons.

Methods inherited from class com.vaadin.flow.component.Component

addListener, fireEvent, from, get, getElement, getEventBus, getId, getLocale, getParent, getTranslation, getTranslation, getTranslation, getUI, hasListener, isAttached, isTemplateMapped, isVisible, onDetach, onEnabledStateChanged, set, setElement, setId, setVisible

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.vaadin.flow.component.HasSize

getCssSize, getHeight, getHeightUnit, getMaxHeight, getMaxWidth, getMinHeight, getMinWidth, getWidth, getWidthUnit, setHeight, setHeight, setHeightFull, setMaxHeight, setMaxHeight, setMaxWidth, setMaxWidth, setMinHeight, setMinHeight, setMinWidth, setMinWidth, setSizeFull, setSizeUndefined, setWidth, setWidth, setWidthFull

Methods inherited from interface com.vaadin.flow.component.HasStyle

addClassName, addClassNames, getClassName, getClassNames, getStyle, hasClassName, removeClassName, removeClassNames, setClassName, setClassName

Methods inherited from interface com.vaadin.flow.component.HasTheme

addThemeName, addThemeNames, getThemeName, getThemeNames, hasThemeName, removeThemeName, removeThemeNames, setThemeName, setThemeName

Methods inherited from interface com.vaadin.flow.component.HasElement

getElement

Methods inherited from interface com.vaadin.flow.component.AttachNotifier

addAttachListener

Methods inherited from interface com.vaadin.flow.component.DetachNotifier

addDetachListener

Constructor Detail

MenuBar

public MenuBar()

Creates an empty menu bar component.

Use addItem(String) to add content to the menu bar.

Method Detail

addItem

public MenuItem addItem(String text)

Creates a new MenuItem component with the provided text content and adds it to the root level of this menu bar.

The added MenuItem component is placed inside a button in the menu bar. If this button overflows the menu bar horizontally, the MenuItem is moved out of the button, into a context menu openable via an overflow button at the end of the button row.

To add content to the sub menu opened by clicking the root level item, use MenuItemBase.getSubMenu().

Parameters:

text - the text content for the new item

Returns:

the added MenuItem component

addItem

public MenuItem addItem(Component component)

Creates a new MenuItem component and adds it to the root level of this menu bar. The provided component is added into the created MenuItem.

The added MenuItem component is placed inside a button in the menu bar. If this button overflows the menu bar horizontally, the MenuItem is moved out of the button, into a context menu openable via an overflow button at the end of the button row.

To add content to the sub menu opened by clicking the root level item, use MenuItemBase.getSubMenu().

Parameters:

component - the component to add inside new item

Returns:

the added MenuItem component

addItem

public MenuItem addItem(String text,
                        ComponentEventListener<ClickEvent<MenuItem>> clickListener)

Creates a new MenuItem component with the provided text content and click listener and adds it to the root level of this menu bar.

The added MenuItem component is placed inside a button in the menu bar. If this button overflows the menu bar horizontally, the MenuItem is moved out of the button, into a context menu openable via an overflow button at the end of the button row.

To add content to the sub menu opened by clicking the root level item, use MenuItemBase.getSubMenu().

Specified by:

addItem in interface HasMenuItems

Parameters:

text - the text content for the new item

clickListener - the handler for clicking the new item, can be null to not add listener

Returns:

the added MenuItem component

See Also:

HasMenuItems.addItem(Component, ComponentEventListener), ContextMenuBase.add(Component...), SubMenuBase.add(Component...)

addItem

public MenuItem addItem(Component component,
                        ComponentEventListener<ClickEvent<MenuItem>> clickListener)

Creates a new MenuItem component with the provided click listener and adds it to the root level of this menu bar. The provided component is added into the created MenuItem.

The added MenuItem component is placed inside a button in the menu bar. If this button overflows the menu bar horizontally, the MenuItem is moved out of the button, into a context menu openable via an overflow button at the end of the button row.

To add content to the sub menu opened by clicking the root level item, use MenuItemBase.getSubMenu().

Specified by:

addItem in interface HasMenuItems

Parameters:

component - the component to add inside the added menu item

clickListener - the handler for clicking the new item, can be null to not add listener

Returns:

the added MenuItem component

See Also:

HasMenuItems.addItem(String, ComponentEventListener), ContextMenuBase.add(Component...), SubMenuBase.add(Component...)

getItems

public List<MenuItem> getItems()

Gets the MenuItem components added to the root level of the menu bar.

To manage the contents inside the sub menus, use the MenuItemBase.getSubMenu().

Returns:

the root level MenuItem components added to this menu bar

remove

public void remove(MenuItem... items)

Removes the given item components from this menu bar.

Parameters:

items - the item components to remove, not null

Throws:

IllegalArgumentException - if any of the item components to remove is not a child of this menu bar

removeAll

public void removeAll()

Removes all item components from this menu bar.

getChildren

public Stream<Component> getChildren()

Gets the child components of this menu bar.

The returned components are the same as the ones returned by getItems().

Overrides:

getChildren in class Component

Returns:

the child components of this menu bar

See Also:

Id

setOpenOnHover

public void setOpenOnHover(boolean openOnHover)

Sets the event which opens the sub menus of the root level buttons.

Parameters:

openOnHover - true to make the sub menus open on hover (mouseover), false to make them openable by clicking

isOpenOnHover

public boolean isOpenOnHover()

Gets whether the sub menus open by clicking or hovering on the root level buttons.

Returns:

true if the sub menus open by hovering on the root level buttons, false if they open by clicking

addThemeVariants

public void addThemeVariants(MenuBarVariant... variants)

Adds theme variants to the component.

Parameters:

variants - theme variants to add

removeThemeVariants

public void removeThemeVariants(MenuBarVariant... variants)

Removes theme variants from the component.

Parameters:

variants - theme variants to remove

getI18n

public MenuBar.MenuBarI18n getI18n()

Gets the internationalization object previously set for this component.

Note: updating the object content that is gotten from this method will not update the lang on the component if not set back using setI18n(MenuBarI18n)

Returns:

the i18n object. It will be null, If the i18n properties weren't set.

setI18n

public void setI18n(MenuBar.MenuBarI18n i18n)

Sets the internationalization properties for this component.

Parameters:

i18n - the internationalized properties, not null

onAttach

protected void onAttach(AttachEvent attachEvent)

Description copied from class: Component

Called when the component is attached to a UI.

The default implementation does nothing.

This method is invoked before the AttachEvent is fired for the component.

Overrides:

onAttach in class Component

Parameters:

attachEvent - the attach event