com.vaadin.flow.component.contextmenu

Class MenuItemBase<C extends ContextMenuBase<C,I,S>,I extends MenuItemBase<C,I,S>,S extends SubMenuBase<C,I,S>>

java.lang.Object

com.vaadin.flow.component.Component

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

Type Parameters:

C - the context menu type

I - the menu item type

S - the sub menu type

All Implemented Interfaces:

AttachNotifier, DetachNotifier, HasComponents, HasElement, HasEnabled, HasText, Serializable

Direct Known Subclasses:

GridMenuItem, MenuItem

@Tag(value="vaadin-context-menu-item")
public abstract class MenuItemBase<C extends ContextMenuBase<C,I,S>,I extends MenuItemBase<C,I,S>,S extends SubMenuBase<C,I,S>>
extends Component
implements HasText, HasComponents, HasEnabled

Base class for item component used inside ContextMenus.

Author:

Vaadin Ltd.

See Also:

MenuItem, Serialized Form

Constructor Summary

Constructors

Constructor and Description
MenuItemBase(C contextMenu) Default constructor

Method Summary

Modifier and Type	Method and Description
void	addThemeNames(String... themeNames) Adds one or more theme names to this item.
protected abstract S	createSubMenu()
protected void	executeJsWhenAttached(String expression, Serializable... parameters)
C	getContextMenu() Gets the context menu component that this item belongs to.
S	getSubMenu() Gets the sub menu API for this menu item.
boolean	hasThemeName(String themeName) Checks if the item has the given theme name.
boolean	isCheckable() Gets whether this item toggles a checkmark icon when clicked.
boolean	isChecked() Gets the checked state of this item.
boolean	isParentItem() Gets whether this item has a sub menu attached to it or not.
void	removeThemeNames(String... themeNames) Removes one or more theme names from this item.
void	setCheckable(boolean checkable) Sets the checkable state of this menu item.
void	setChecked(boolean checked) Sets the checked state of this item.

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

addListener, fireEvent, from, get, getChildren, getElement, getEventBus, getId, getLocale, getParent, getTranslation, getTranslation, getTranslation, getTranslation, getUI, hasListener, isAttached, isTemplateMapped, isVisible, onAttach, 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.HasText

getText, setText

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

add, add, addComponentAsFirst, addComponentAtIndex, remove, removeAll

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

isEnabled, setEnabled

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

MenuItemBase

public MenuItemBase(C contextMenu)

Default constructor

Parameters:

contextMenu - the context menu to which this item belongs to

Method Detail

getContextMenu

public C getContextMenu()

Gets the context menu component that this item belongs to.

Returns:

the context-menu component

getSubMenu

public S getSubMenu()

Gets the sub menu API for this menu item. Adding content to the returned sub menu makes this component a parent item which opens the sub menu overlay. When the sub menu has no content, it won't be rendered.

Returns:

the sub menu that can be opened via this item

isParentItem

public boolean isParentItem()

Gets whether this item has a sub menu attached to it or not.

Returns:

true if this component has a sub menu with content inside it, false otherwise

See Also:

getSubMenu()

setCheckable

public void setCheckable(boolean checkable)

Sets the checkable state of this menu item. A checkable item toggles a checkmark icon when clicked. Changes in the checked state can be handled in the item's click handler with isChecked().

Setting a checked item un-checkable also makes it un-checked.

Parameters:

checkable - true to enable toggling the checked-state of this menu item by clicking, false to disable it.

Throws:

IllegalStateException - if setting a parent item checkable

isCheckable

public boolean isCheckable()

Gets whether this item toggles a checkmark icon when clicked.

Returns:

the checkable state of the item

See Also:

setCheckable(boolean)

setChecked

public void setChecked(boolean checked)

Sets the checked state of this item. A checked item displays a checkmark icon next to it. The checked state is also toggled by clicking the item.

Note that the item needs to be explicitly set as checkable via setCheckable(boolean) in order to check it.

Parameters:

checked - true to check this item, false to un-check it

Throws:

IllegalStateException - if trying to check the item when it's checkable

isChecked

public boolean isChecked()

Gets the checked state of this item. The item can be checked and un-checked with setChecked(boolean) or by clicking it when it is checkable. A checked item displays a checkmark icon inside it.

Returns:

true if the item is checked, false otherwise

See Also:

setCheckable(boolean), setChecked(boolean)

addThemeNames

public void addThemeNames(String... themeNames)

Adds one or more theme names to this item. Multiple theme names can be specified by using multiple parameters.

Parameters:

themeNames - the theme name or theme names to be added to the item

removeThemeNames

public void removeThemeNames(String... themeNames)

Removes one or more theme names from this item. Multiple theme names can be specified by using multiple parameters.

Parameters:

themeNames - the theme name or theme names to be removed from the item

hasThemeName

public boolean hasThemeName(String themeName)

Checks if the item has the given theme name.

Parameters:

themeName - the theme name to check for

Returns:

true if the item has the given theme name, false otherwise

createSubMenu

protected abstract S createSubMenu()

executeJsWhenAttached

protected void executeJsWhenAttached(String expression,
                                     Serializable... parameters)