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com.vaadin.flow.router.
Class BeforeLeaveEvent
- java.lang.Object
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- java.util.EventObject
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- com.vaadin.flow.router.BeforeEvent
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- com.vaadin.flow.router.BeforeLeaveEvent
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All Implemented Interfaces:
public class BeforeLeaveEvent extends BeforeEventEvent created before navigation happens.
Since:
1.0
Author:
Vaadin Ltd
See Also:
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Nested Class Summary
Nested Classes Modifier and Type Class and Description classBeforeLeaveEvent.ContinueNavigationActionThe action to resume a postponed
BeforeEnterEvent.
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Field Summary
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Fields inherited from class java.util.EventObject
source
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Constructor Summary
Constructors Constructor and Description BeforeLeaveEvent(NavigationEvent event, Class<?> navigationTarget)Construct event from a NavigationEvent.
BeforeLeaveEvent(Router router, NavigationTrigger trigger, Location location, Class<?> navigationTarget, UI ui)Constructs a new BeforeNavigation Event.
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Method Summary
All Methods Modifier and Type Method and Description BeforeLeaveEvent.ContinueNavigationActiongetContinueNavigationAction()Gets the action used to resume this event, if it was postponed.
booleanisPostponed()Checks whether this event was postponed.
BeforeLeaveEvent.ContinueNavigationActionpostpone()Initiates the postponement of the current navigation transition, allowing a listener to e.g.
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Methods inherited from class com.vaadin.flow.router.BeforeEvent
getErrorParameter, getLocation, getNavigationTarget, getRerouteTarget, getRouteTargetType, getSource, getTrigger, getUI, hasErrorParameter, hasRerouteTarget, rerouteTo, rerouteTo, rerouteTo, rerouteTo, rerouteTo, rerouteTo, rerouteToError, rerouteToError, rerouteToError
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Methods inherited from class java.util.EventObject
toString
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Constructor Detail
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BeforeLeaveEvent
public BeforeLeaveEvent(NavigationEvent event, Class<?> navigationTarget)Construct event from a NavigationEvent.
Parameters:
event- NavigationEvent that is on goingnavigationTarget- Navigation target
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BeforeLeaveEvent
public BeforeLeaveEvent(Router router, NavigationTrigger trigger, Location location, Class<?> navigationTarget, UI ui)Constructs a new BeforeNavigation Event.
Parameters:
router- the router that triggered the change, notnulltrigger- the type of user action that triggered this location change, notnulllocation- the new location, notnullnavigationTarget- navigation target classui- the UI related to the navigation
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Method Detail
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postpone
public BeforeLeaveEvent.ContinueNavigationAction postpone()Initiates the postponement of the current navigation transition, allowing a listener to e.g. display a confirmation dialog before finishing the transition.
This is only valid while leaving (deactivating) a page; if the method is called while entering / activating the new page, it will throw an
IllegalStateException.Returns:
the action to run when the transition is to be resumed, or null
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isPostponed
public boolean isPostponed()Checks whether this event was postponed.
Returns:
true if the event was postponed, false otherwise
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getContinueNavigationAction
public BeforeLeaveEvent.ContinueNavigationAction getContinueNavigationAction()Gets the action used to resume this event, if it was postponed.
Returns:
the action used to resume this event if it was postponed, or null if it is not being postponed
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