Package com.vaadin.flow.component.contextmenu

Class MenuManager<C extends Component,I extends MenuItemBase<?,I,S>,S extends SubMenuBase<?,I,S>>

java.lang.Object

com.vaadin.flow.component.contextmenu.MenuManager<C,I,S>

Type Parameters:

C - the context menu type

I - the menu item type

S - the sub menu type

All Implemented Interfaces:

Serializable

public class MenuManager<C extends Component,I extends MenuItemBase<?,I,S>,S extends SubMenuBase<?,I,S>>
extends Object
implements Serializable

Common management logic for context menus and sub menus. Maintains the list of components to stamp into one overlay.

Author:

Vaadin Ltd.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
MenuManager(C menu, SerializableRunnable contentReset, SerializableBiFunction<C,SerializableRunnable,I> itemGenerator, Class<I> itemType, I parentMenuItem)	Creates a new manager instance.

Method Summary

Modifier and Type	Method	Description
void	add(Component... components)	Adds components to the (sub)menu.
void	addComponentAtIndex(int index, Component component)	Inserts component to the (sub)menu using the index.
I	addItem(Component component)	Adds a component as a menu item.
I	addItem(Component component, ComponentEventListener<ClickEvent<I>> clickListener)	Adds a component as a menu item with a click listener.
I	addItem(String text)	Adds a text as a menu item.
I	addItem(String text, ComponentEventListener<ClickEvent<I>> clickListener)	Adds a text as a menu item with a click listener.
Stream<Component>	getChildren()	Gets all (sub)menu children.
List<I>	getItems()	Gets all children items.
void	remove(Component... components)	Removes components to the (sub)menu.
void	removeAll()	Remove all components and items from (sub)menu.

Methods inherited from class java.lang.Object

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

Constructor Details

MenuManager

public MenuManager(C menu,
 SerializableRunnable contentReset,
 SerializableBiFunction<C,SerializableRunnable,I> itemGenerator,
 Class<I> itemType,
 I parentMenuItem)

Creates a new manager instance.

Parameters:

menu - the context menu

contentReset - callback to reset the context menu

itemGenerator - the item generator/factory

itemType - the item type

parentMenuItem - the parent menu item of the submenu

Method Details

addItem

public I addItem(String text)

Adds a text as a menu item.

Parameters:

text - the text for the menu item

Returns:

a new menu item

addItem

public I addItem(Component component)

Adds a component as a menu item.

Parameters:

component - the component for the menu item

Returns:

a new menu item

addItem

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

Adds a text as a menu item with a click listener.

Parameters:

text - the text for the menu item

clickListener - a click listener

Returns:

a new menu item

addItem

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

Adds a component as a menu item with a click listener.

Parameters:

component - the component for the menu item

clickListener - a click listener

Returns:

a new menu item

add

public void add(Component... components)

Adds components to the (sub)menu.

The components are added into the content as is, they are not wrapped as menu items.

Parameters:

components - components to add

See Also:

• remove(Component...)
• addComponentAtIndex(int, Component)

remove

public void remove(Component... components)

Removes components to the (sub)menu.

Parameters:

components - components to remove

See Also:

• add(Component...)

removeAll

public void removeAll()

Remove all components and items from (sub)menu.

See Also:

• remove(Component...)

addComponentAtIndex

public void addComponentAtIndex(int index,
 Component component)

Inserts component to the (sub)menu using the index.

The component is inserted into the content as is, it is not wrapped as a menu item.

Parameters:

index - index to insert, not negative

component - component to insert

See Also:

• add(Component...)
• remove(Component...)

getChildren

public Stream<Component> getChildren()

Gets all (sub)menu children.

Children consist of components and items.

Returns:

the children components

See Also:

• add(Component...)
• addItem(Component)
• getItems()

getItems

public List<I> getItems()

Gets all children items.

The items are filtered using the provided item type in the constructor.

Returns:

all children items

See Also:

• getChildren()