Package 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, HasEnabled, HasSize, HasStyle, HasTheme, HasThemeVariant<MenuBarVariant>, Serializable

@Tag("vaadin-menu-bar")
@JsModule("./menubarConnector.js") @JsModule("@vaadin/menu-bar/src/vaadin-menu-bar.js") @JsModule("@vaadin/tooltip/src/vaadin-tooltip.js")
@NpmPackage(value="@vaadin/menu-bar",version="25.0.0-alpha19") @NpmPackage(value="@vaadin/tooltip",version="25.0.0-alpha19")
public class MenuBar
extends Component
implements HasEnabled, HasMenuItems, HasSize, HasStyle, HasThemeVariant<MenuBarVariant>

Menu Bar is a horizontal button bar with hierarchical drop-down menus. Menu items can either trigger an action, open a menu, or work as a toggle.

Author:

Vaadin Ltd

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

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

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	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(Component component, String tooltipText)	Creates a new MenuItem component with the provided tooltip text and adds it to the root level of this menu bar.
MenuItem	addItem(Component component, String tooltipText, ComponentEventListener<ClickEvent<MenuItem>> clickListener)	Creates a new MenuItem component with the provided click listener and the tooltip text 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.
MenuItem	addItem(String text, String tooltipText)	Creates a new MenuItem component with the provided text content and the tooltip text and adds it to the root level of this menu bar.
MenuItem	addItem(String text, String tooltipText, ComponentEventListener<ClickEvent<MenuItem>> clickListener)	Creates a new MenuItem component with the provided text content and the tooltip text and click listener and adds it to the root level of this menu bar.
void	close()	Closes the current submenu.
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.
boolean	isReverseCollapseOrder()	Gets whether the menu bar uses reverse collapse order.
boolean	isTabNavigation()	Gets whether the menu bar uses tab navigation.
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	setI18n(MenuBar.MenuBarI18n i18n)	Sets the internationalization object for this component.
void	setOpenOnHover(boolean openOnHover)	Sets the event which opens the sub menus of the root level buttons.
void	setReverseCollapseOrder(boolean reverseCollapseOrder)	Sets reverse collapse order for the menu bar.
void	setTabNavigation(boolean tabNavigation)	Sets tab navigation for the menu bar.
void	setTooltipText(MenuItem item, String tooltipText)	Sets the tooltip text for the given MenuItem.

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

addListener, findAncestor, fireEvent, from, get, getElement, getEventBus, getId, getListeners, getLocale, getParent, getTranslation, getTranslation, getTranslation, getTranslation, getTranslation, getTranslation, getUI, hasListener, isAttached, isTemplateMapped, isVisible, onDetach, onEnabledStateChanged, removeFromParent, scrollIntoView, scrollIntoView, 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.AttachNotifier

addAttachListener

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

addDetachListener

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

getElement

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

isEnabled, setEnabled

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

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.shared.HasThemeVariant

addThemeVariants, removeThemeVariants, setThemeVariant, setThemeVariants, setThemeVariants

Constructor Details

MenuBar

public MenuBar()

Creates an empty menu bar component.

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

Method Details

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)

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)

addItem

public MenuItem addItem(String text,
 String tooltipText)

Creates a new MenuItem component with the provided text content and the tooltip text 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

tooltipText - the tooltip text for the new item

Returns:

the added MenuItem component

addItem

public MenuItem addItem(Component component,
 String tooltipText)

Creates a new MenuItem component with the provided tooltip text 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

tooltipText - the tooltip text for the new item

Returns:

the added MenuItem component

addItem

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

Creates a new MenuItem component with the provided text content and the tooltip text 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().

Parameters:

text - the text content for the new item

tooltipText - the tooltip text for the new item

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

Returns:

the added MenuItem component

addItem

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

Creates a new MenuItem component with the provided click listener and the tooltip text 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 the added menu item

tooltipText - the tooltip text for the new item

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

Returns:

the added MenuItem 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

setReverseCollapseOrder

public void setReverseCollapseOrder(boolean reverseCollapseOrder)

Sets reverse collapse order for the menu bar.

Parameters:

reverseCollapseOrder - If true, the buttons will be collapsed into the overflow menu starting from the "start" end of the bar instead of the "end".

isReverseCollapseOrder

public boolean isReverseCollapseOrder()

Gets whether the menu bar uses reverse collapse order.

Returns:

true if the buttons will be collapsed into the overflow menu starting from the "start" end of the bar instead of the "end".

setTabNavigation

public void setTabNavigation(boolean tabNavigation)

Sets tab navigation for the menu bar.

Parameters:

tabNavigation - If true, the top-level menu items is traversable by tab instead of arrow keys (i.e. disabling roving tabindex)

isTabNavigation

public boolean isTabNavigation()

Gets whether the menu bar uses tab navigation.

Returns:

true if the top-level menu items is traversable by tab instead of arrow keys (i.e. disabling roving tabindex)

getI18n

public MenuBar.MenuBarI18n getI18n()

Gets the internationalization object previously set for this component.

NOTE: Updating the instance that is returned from this method will not update the component if not set again using setI18n(MenuBarI18n)

Returns:

the i18n object or null if no i18n object has been set

setI18n

public void setI18n(MenuBar.MenuBarI18n i18n)

Sets the internationalization object for this component.

Parameters:

i18n - the i18n object, not null

onAttach

protected void onAttach(AttachEvent attachEvent)

Description copied from class: Component

Called when the component is attached to a UI.

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

Make sure to call super.onAttach when overriding this method.

Overrides:

onAttach in class Component

Parameters:

attachEvent - the attach event

setTooltipText

public void setTooltipText(MenuItem item,
 String tooltipText)

Sets the tooltip text for the given MenuItem.

Parameters:

item - the menu item to set the tooltip for

tooltipText - the tooltip text to set for the item

close

public void close()

Closes the current submenu.