com.vaadin.ui
Class UI

java.lang.Object
  com.vaadin.server.AbstractClientConnector
      com.vaadin.ui.AbstractComponent
          com.vaadin.ui.AbstractSingleComponentContainer
              com.vaadin.ui.UI

All Implemented Interfaces:

Action.Container, Action.Notifier, MethodEventSource, ClientConnector, RpcTarget, Sizeable, VariableOwner, com.vaadin.shared.Connector, Component, HasComponents, HasComponents.ComponentAttachDetachNotifier, LegacyComponent, SingleComponentContainer, java.io.Serializable, java.lang.Iterable<Component>, java.util.EventListener

Direct Known Subclasses:

LegacyWindow

public abstract class UI
extends AbstractSingleComponentContainer
implements Action.Container, Action.Notifier, LegacyComponent

The topmost component in any component hierarchy. There is one UI for every Vaadin instance in a browser window. A UI may either represent an entire browser window (or tab) or some part of a html page where a Vaadin application is embedded.

The UI is the server side entry point for various client side features that are not represented as components added to a layout, e.g notifications, sub windows, and executing javascript in the browser.

When a new UI instance is needed, typically because the user opens a URL in a browser window which points to e.g. VaadinServlet, all UIProviders registered to the current VaadinServiceSession are queried for the UI class that should be used. The selection is by defaylt based on the parameter from web.xml.

After a UI has been created by the application, it is initialized using init(VaadinRequest). This method is intended to be overridden by the developer to add components to the user interface and initialize non-component functionality. The component hierarchy must be initialized by passing a Component with the main layout or other content of the view to AbstractSingleComponentContainer.setContent(Component) or to the constructor of the UI.

Since:

7.0

See Also:

init(VaadinRequest), UIProvider, Serialized Form

Nested Class Summary

static class	UI.CleanupEvent Event fired when a UI is removed from the application.
static interface	UI.CleanupListener Interface for listening UI cleanup events.

Nested classes/interfaces inherited from class com.vaadin.ui.AbstractComponent

AbstractComponent.ComponentErrorEvent, AbstractComponent.ComponentErrorHandler

Nested classes/interfaces inherited from interface com.vaadin.server.VariableOwner

VariableOwner.ErrorEvent

Nested classes/interfaces inherited from interface com.vaadin.ui.Component

Component.ErrorEvent, Component.ErrorListener, Component.Event, Component.Focusable, Component.Listener

Nested classes/interfaces inherited from interface com.vaadin.server.Sizeable

Sizeable.Unit

Nested classes/interfaces inherited from interface com.vaadin.ui.HasComponents

HasComponents.ComponentAttachDetachNotifier, HasComponents.ComponentAttachEvent, HasComponents.ComponentAttachListener, HasComponents.ComponentDetachEvent, HasComponents.ComponentDetachListener

Field Summary

protected ActionManager

actionManager Keeps track of the Actions added to this component, and manages the painting and handling as well.

Fields inherited from interface com.vaadin.server.Sizeable

SIZE_UNDEFINED, UNITS_CM, UNITS_EM, UNITS_EX, UNITS_INCH, UNITS_MM, UNITS_PERCENTAGE, UNITS_PICAS, UNITS_PIXELS, UNITS_POINTS

Constructor Summary

UI()
Creates a new empty UI without a caption.

UI(Component content)
Creates a new UI with the given component (often a layout) as its content.

Method Summary

<T extends Action & Action.Listener> void	addAction(T action)
void	addActionHandler(Action.Handler actionHandler) Registers a new action handler for this container
void	addCleanupListener(UI.CleanupListener listener) Adds a cleanup listener to the UI.
void	addClickListener(MouseEvents.ClickListener listener) Add a click listener to the UI.
void	addListener(MouseEvents.ClickListener listener) Deprecated. Since 7.0, replaced by #addClickListener(ClickListener)
void	addWindow(Window window) Adds a window as a subwindow inside this UI.
void	changeVariables(java.lang.Object source, java.util.Map<java.lang.String,java.lang.Object> variables) Called when one or more variables handled by the implementing class are changed.
void	doInit(VaadinRequest request, int uiId) Internal initialization method, should not be overridden.
void	fireCleanupEvent() For internal use only.
void	focus() Sets the focus for this component if the component is Focusable.
protected ActionManager	getActionManager() Gets the ActionManager used to manage the ShortcutListeners added to this Field.
int	getComponentCount() Gets the number of children this SingleComponentContainer has.
ConnectorTracker	getConnectorTracker()
static UI	getCurrent() Gets the currently used UI.
long	getLastHeartbeatTime() Returns the timestamp (milliseconds since the epoch) of the last received heartbeat for this UI.
long	getLastUidlRequestTime() Returns the timestamp (milliseconds since the epoch) of the last received UIDL request for this UI.
Navigator	getNavigator() Returns the navigator attached to this UI or null if there is no navigator.
Page	getPage()
VaadinServiceSession	getSession() Gets the application object to which the component is attached.
protected com.vaadin.shared.ui.ui.UIState	getState() Returns the shared state bean with information to be sent from the server to the client.
java.lang.Class<? extends com.vaadin.shared.ui.ui.UIState>	getStateType() Returns the type of the shared state for this connector
java.lang.String	getTheme() Gets the theme that was used when the UI was initialized.
UI	getUI() Overridden to return a value instead of referring to the parent.
int	getUIId() Gets the id of the UI, used to identify this UI within its application when processing requests.
java.util.Collection<Window>	getWindows() Gets all the windows added to this UI.
protected abstract void	init(VaadinRequest request) Initializes this UI.
boolean	isConnectorEnabled() Checks if the communicator is enabled.
boolean	isResizeLazy() Checks whether lazy resize is enabled.
java.util.Iterator<Component>	iterator() Gets an iterator to the collection of contained components.
void	paintContent(PaintTarget target) Paints the Paintable into a UIDL stream.
<T extends Action & Action.Listener> void	removeAction(T action)
void	removeActionHandler(Action.Handler actionHandler) Removes a previously registered action handler for the contents of this container.
void	removeCleanupListener(UI.CleanupListener listener) Removes a cleanup listener from the UI, if previously added with addCleanupListener(CleanupListener).
void	removeClickListener(MouseEvents.ClickListener listener) Remove a click listener from the UI.
void	removeListener(MouseEvents.ClickListener listener) Deprecated. Since 7.0, replaced by #removeClickListener(ClickListener)
boolean	removeWindow(Window window) Remove the given subwindow from this UI.
void	scrollIntoView(Component component) Scrolls any component between the component and UI to a suitable position so the component is visible to the user.
void	setCaption(java.lang.String caption) Deprecated. as of 7.0.0, use Page.setTitle(String)
static void	setCurrent(UI ui) Sets the thread local for the current UI.
void	setFocusedComponent(Component.Focusable focusable) This method is used by Component.Focusable objects to request focus to themselves.
void	setLastHeartbeatTime(long lastHeartbeat) Sets the last heartbeat request timestamp for this UI.
void	setLastUidlRequestTime(long lastUidlRequest) Sets the last UIDL request timestamp for this UI.
void	setNavigator(Navigator navigator) For internal use only.
void	setResizeLazy(boolean resizeLazy) Should resize operations be lazy, i.e.
void	setScrollTop(int scrollTop)
void	setSession(VaadinServiceSession session) Sets the application to which this UI is assigned.
void	showNotification(Notification notification) Deprecated. As of 7.0, use Notification.show instead
void	showNotification(java.lang.String caption) Deprecated. As of 7.0, use Notification.show instead but be aware that Notification.show does not allow HTML.
void	showNotification(java.lang.String caption, Notification.Type type) Deprecated. As of 7.0, use Notification.show instead but be aware that Notification.show does not allow HTML.
void	showNotification(java.lang.String caption, java.lang.String description) Deprecated. As of 7.0, use new Notification(...).show(Page) instead but be aware that HTML by default not allowed.
void	showNotification(java.lang.String caption, java.lang.String description, Notification.Type type) Deprecated. As of 7.0, use new Notification(...).show(Page) instead but be aware that HTML by default not allowed.
void	showNotification(java.lang.String caption, java.lang.String description, Notification.Type type, boolean htmlContentAllowed) Deprecated. As of 7.0, use new Notification(...).show(Page).

Methods inherited from class com.vaadin.ui.AbstractSingleComponentContainer

addComponentAttachListener, addComponentDetachListener, fireComponentAttachEvent, fireComponentDetachEvent, getContent, isComponentVisible, removeComponentAttachListener, removeComponentDetachListener, removeFromParent, setContent, setHeight, setVisible, setWidth

Methods inherited from class com.vaadin.ui.AbstractComponent

addListener, addShortcutListener, addStyleName, attach, beforeClientResponse, detach, findAncestor, fireComponentErrorEvent, fireComponentEvent, getCaption, getComponentError, getData, getDebugId, getDescription, getErrorHandler, getErrorMessage, getHeight, getHeightUnits, getIcon, getId, getLocale, getParent, getPrimaryStyleName, getStyleName, getWidth, getWidthUnits, handleError, isEnabled, isImmediate, isReadOnly, isVisible, removeListener, removeShortcutListener, removeStyleName, setComponentError, setData, setDebugId, setDescription, setEnabled, setErrorHandler, setHeight, setIcon, setId, setImmediate, setLocale, setParent, setPrimaryStyleName, setReadOnly, setSizeFull, setSizeUndefined, setStyleName, setWidth

Methods inherited from class com.vaadin.server.AbstractClientConnector

addExtension, addListener, addListener, addListener, addMethodInvocationToQueue, createState, encodeState, fireEvent, getAllChildrenIterable, getConnectorId, getExtensions, getListeners, getResource, getRpcManager, getRpcProxy, handleConnectorRequest, hasListeners, markAsDirty, markAsDirtyRecursive, registerRpc, registerRpc, removeExtension, removeListener, removeListener, removeListener, removeListener, requestRepaint, requestRepaintAll, retrievePendingRpcCalls, setResource

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.vaadin.ui.LegacyComponent

markAsDirty

Methods inherited from interface com.vaadin.server.VariableOwner

isEnabled, isImmediate

Methods inherited from interface com.vaadin.ui.Component

addListener, addStyleName, attach, getCaption, getDescription, getIcon, getId, getLocale, getParent, getPrimaryStyleName, getStyleName, isEnabled, isReadOnly, isVisible, removeListener, removeStyleName, setEnabled, setIcon, setId, setPrimaryStyleName, setReadOnly, setStyleName, setVisible

Methods inherited from interface com.vaadin.server.ClientConnector

beforeClientResponse, detach, encodeState, getExtensions, handleConnectorRequest, markAsDirtyRecursive, removeExtension, requestRepaint, requestRepaintAll, retrievePendingRpcCalls, setParent

Methods inherited from interface com.vaadin.shared.Connector

getConnectorId

Methods inherited from interface com.vaadin.server.RpcTarget

getRpcManager

Methods inherited from interface com.vaadin.server.Sizeable

getHeight, getHeightUnits, getWidth, getWidthUnits, setHeight, setHeight, setSizeFull, setSizeUndefined, setWidth, setWidth

Field Detail

actionManager

protected ActionManager actionManager

Keeps track of the Actions added to this component, and manages the painting and handling as well.

Constructor Detail

UI

public UI()

Creates a new empty UI without a caption. The content of the UI must be set by calling AbstractSingleComponentContainer.setContent(Component) before using the UI.

UI

public UI(Component content)

Creates a new UI with the given component (often a layout) as its content.

Parameters:

content - the component to use as this UIs content.

See Also:

AbstractSingleComponentContainer.setContent(Component)

Method Detail

getState

protected com.vaadin.shared.ui.ui.UIState getState()

Description copied from class: AbstractComponent

Returns the shared state bean with information to be sent from the server to the client. Subclasses should override this method and set any relevant fields of the state returned by super.getState().

Overrides:

getState in class AbstractComponent

Returns:

updated component shared state

getStateType

public java.lang.Class<? extends com.vaadin.shared.ui.ui.UIState> getStateType()

Description copied from interface: ClientConnector

Returns the type of the shared state for this connector

Specified by:

getStateType in interface ClientConnector

Overrides:

getStateType in class AbstractClientConnector

Returns:

The type of the state. Must never return null.

getUI

public UI getUI()

Overridden to return a value instead of referring to the parent.

Specified by:

getUI in interface ClientConnector

Specified by:

getUI in interface Component

Overrides:

getUI in class AbstractClientConnector

Returns:

this UI

See Also:

AbstractClientConnector.getUI()

getSession

public VaadinServiceSession getSession()

Gets the application object to which the component is attached.

The method will return null if the component is not currently attached to an application.

Getting a null value is often a problem in constructors of regular components and in the initializers of custom composite components. A standard workaround is to use VaadinServiceSession.getCurrent() to retrieve the application instance that the current request relates to. Another way is to move the problematic initialization to AbstractComponent.attach(), as described in the documentation of the method.

Overrides:

getSession in class AbstractClientConnector

Returns:

the parent application of the component or null.

See Also:

AbstractComponent.attach()

paintContent

public void paintContent(PaintTarget target)
                  throws PaintException

Description copied from interface: LegacyComponent

Paints the Paintable into a UIDL stream. This method creates the UIDL sequence describing it and outputs it to the given UIDL stream.

It is called when the contents of the component should be painted in response to the component first being shown or having been altered so that its visual representation is changed.

Specified by:

paintContent in interface LegacyComponent

Parameters:

target - the target UIDL stream where the component should paint itself to.

Throws:

PaintException - if the paint operation failed.

fireCleanupEvent

public void fireCleanupEvent()

For internal use only.

changeVariables

public void changeVariables(java.lang.Object source,
                            java.util.Map<java.lang.String,java.lang.Object> variables)

Description copied from interface: VariableOwner

Called when one or more variables handled by the implementing class are changed.

Specified by:

changeVariables in interface VariableOwner

Parameters:

source - the Source of the variable change. This is the origin of the event. For example in Web Adapter this is the request.

variables - the Mapping from variable names to new variable values.

iterator

public java.util.Iterator<Component> iterator()

Description copied from interface: HasComponents

Gets an iterator to the collection of contained components. Using this iterator it is possible to step through all components contained in this container.

Specified by:

iterator in interface HasComponents

Specified by:

iterator in interface java.lang.Iterable<Component>

Overrides:

iterator in class AbstractSingleComponentContainer

Returns:

the component iterator.

getComponentCount

public int getComponentCount()

Description copied from interface: SingleComponentContainer

Gets the number of children this SingleComponentContainer has. This must be symmetric with what HasComponents.iterator() returns and thus typically return 1 if the content is set, 0 otherwise.

Specified by:

getComponentCount in interface SingleComponentContainer

Overrides:

getComponentCount in class AbstractSingleComponentContainer

Returns:

The number of child components this container has.

setSession

public void setSession(VaadinServiceSession session)

Sets the application to which this UI is assigned. It is not legal to change the application once it has been set nor to set a null application.

This method is mainly intended for internal use by the framework.

Parameters:

session - the application to set

Throws:

java.lang.IllegalStateException - if the application has already been set

See Also:

getSession()

getUIId

public int getUIId()

Gets the id of the UI, used to identify this UI within its application when processing requests. The UI id should be present in every request to the server that originates from this UI. VaadinService.findUI(VaadinRequest) uses this id to find the route to which the request belongs.

Returns:

addWindow

public void addWindow(Window window)
               throws java.lang.IllegalArgumentException,
                      java.lang.NullPointerException

Adds a window as a subwindow inside this UI. To open a new browser window or tab, you should instead use a UIProvider.

Parameters:

window -

Throws:

java.lang.IllegalArgumentException - if the window is already added to an application

java.lang.NullPointerException - if the given Window is null.

removeWindow

public boolean removeWindow(Window window)

Remove the given subwindow from this UI. Since Vaadin 6.5, Window.CloseListeners are called also when explicitly removing a window by calling this method. Since Vaadin 6.5, returns a boolean indicating if the window was removed or not.

Parameters:

window - Window to be removed.

Returns:

true if the subwindow was removed, false otherwise

getWindows

public java.util.Collection<Window> getWindows()

Gets all the windows added to this UI.

Returns:

an unmodifiable collection of windows

focus

public void focus()

Description copied from class: AbstractComponent

Sets the focus for this component if the component is Focusable.

Overrides:

focus in class AbstractComponent

setFocusedComponent

public void setFocusedComponent(Component.Focusable focusable)

This method is used by Component.Focusable objects to request focus to themselves. Focus renders must be handled at window level (instead of Component.Focusable) due we want the last focused component to be focused in client too. Not the one that is rendered last (the case we'd get if implemented in Focusable only). To focus component from Vaadin application, use Focusable.focus(). See Focusable.

Parameters:

focusable - to be focused on next paint

scrollIntoView

public void scrollIntoView(Component component)
                    throws java.lang.IllegalArgumentException

Scrolls any component between the component and UI to a suitable position so the component is visible to the user. The given component must belong to this UI.

Parameters:

component - the component to be scrolled into view

Throws:

java.lang.IllegalArgumentException - if component does not belong to this UI

doInit

public void doInit(VaadinRequest request,
                   int uiId)

Internal initialization method, should not be overridden. This method is not declared as final because that would break compatibility with e.g. CDI.

Parameters:

request - the initialization request

uiId - the id of the new ui

init

protected abstract void init(VaadinRequest request)

Initializes this UI. This method is intended to be overridden by subclasses to build the view and configure non-component functionality. Performing the initialization in a constructor is not suggested as the state of the UI is not properly set up when the constructor is invoked.

The VaadinRequest can be used to get information about the request that caused this UI to be created.

Parameters:

request - the Vaadin request that caused this UI to be created

setCurrent

public static void setCurrent(UI ui)

Sets the thread local for the current UI. This method is used by the framework to set the current application whenever a new request is processed and it is cleared when the request has been processed.

The application developer can also use this method to define the current UI outside the normal request handling, e.g. when initiating custom background threads.

Parameters:

uI - the UI to register as the current UI

See Also:

getCurrent(), ThreadLocal

getCurrent

public static UI getCurrent()

Gets the currently used UI. The current UI is automatically defined when processing requests to the server. In other cases, (e.g. from background threads), the current UI is not automatically defined.

Returns:

the current UI instance if available, otherwise null

See Also:

setCurrent(UI)

setScrollTop

public void setScrollTop(int scrollTop)

getActionManager

protected ActionManager getActionManager()

Description copied from class: AbstractComponent

Gets the ActionManager used to manage the ShortcutListeners added to this Field.

Overrides:

getActionManager in class AbstractComponent

Returns:

the ActionManager in use

addAction

public <T extends Action & Action.Listener> void addAction(T action)

Specified by:

addAction in interface Action.Notifier

removeAction

public <T extends Action & Action.Listener> void removeAction(T action)

Specified by:

removeAction in interface Action.Notifier

addActionHandler

public void addActionHandler(Action.Handler actionHandler)

Description copied from interface: Action.Container

Registers a new action handler for this container

Specified by:

addActionHandler in interface Action.Container

Parameters:

actionHandler - the new handler to be added.

removeActionHandler

public void removeActionHandler(Action.Handler actionHandler)

Description copied from interface: Action.Container

Removes a previously registered action handler for the contents of this container.

Specified by:

removeActionHandler in interface Action.Container

Parameters:

actionHandler - the handler to be removed.

setResizeLazy

public void setResizeLazy(boolean resizeLazy)

Should resize operations be lazy, i.e. should there be a delay before layout sizes are recalculated. Speeds up resize operations in slow UIs with the penalty of slightly decreased usability.

Default value: false

Parameters:

resizeLazy - true to use a delay before recalculating sizes, false to calculate immediately.

isResizeLazy

public boolean isResizeLazy()

Checks whether lazy resize is enabled.

Returns:

true if lazy resize is enabled, false if lazy resize is not enabled

addClickListener

public void addClickListener(MouseEvents.ClickListener listener)

Add a click listener to the UI. The listener is called whenever the user clicks inside the UI. Also when the click targets a component inside the UI, provided the targeted component does not prevent the click event from propagating. Use #removeListener(ClickListener) to remove the listener.

Parameters:

listener - The listener to add

addCleanupListener

public void addCleanupListener(UI.CleanupListener listener)

Adds a cleanup listener to the UI. Cleanup listeners are invoked when the UI is removed from the session due to UI or session expiration.

Parameters:

listener - The CleanupListener that should be added.

addListener

@Deprecated
public void addListener(MouseEvents.ClickListener listener)

Deprecated. Since 7.0, replaced by #addClickListener(ClickListener)

removeClickListener

public void removeClickListener(MouseEvents.ClickListener listener)

Remove a click listener from the UI. The listener should earlier have been added using #addListener(ClickListener).

Parameters:

listener - The listener to remove

removeCleanupListener

public void removeCleanupListener(UI.CleanupListener listener)

Removes a cleanup listener from the UI, if previously added with addCleanupListener(CleanupListener).

Parameters:

listener - The CleanupListener that should be removed

removeListener

@Deprecated
public void removeListener(MouseEvents.ClickListener listener)

Deprecated. Since 7.0, replaced by #removeClickListener(ClickListener)

isConnectorEnabled

public boolean isConnectorEnabled()

Description copied from interface: ClientConnector

Checks if the communicator is enabled. An enabled communicator is allowed to receive messages from its counter-part.

Specified by:

isConnectorEnabled in interface ClientConnector

Overrides:

isConnectorEnabled in class AbstractComponent

Returns:

true if the connector can receive messages, false otherwise

getConnectorTracker

public ConnectorTracker getConnectorTracker()

getPage

public Page getPage()

getNavigator

public Navigator getNavigator()

Returns the navigator attached to this UI or null if there is no navigator.

Returns:

setNavigator

public void setNavigator(Navigator navigator)

For internal use only.

Parameters:

navigator -

setCaption

@Deprecated
public void setCaption(java.lang.String caption)

Deprecated. as of 7.0.0, use Page.setTitle(String)

Setting the caption of a UI is not supported. To set the title of the HTML page, use Page.setTitle

Specified by:

setCaption in interface Component

Overrides:

setCaption in class AbstractComponent

Parameters:

caption - the new caption String for the component.

showNotification

@Deprecated
public void showNotification(java.lang.String caption)

Deprecated. As of 7.0, use Notification.show instead but be aware that Notification.show does not allow HTML.

Shows a notification message on the middle of the UI. The message automatically disappears ("humanized message"). Care should be taken to to avoid XSS vulnerabilities as the caption is rendered as html.

Parameters:

caption - The message

See Also:

showNotification(Notification), Notification

showNotification

@Deprecated
public void showNotification(java.lang.String caption,
                                        Notification.Type type)

Deprecated. As of 7.0, use Notification.show instead but be aware that Notification.show does not allow HTML.

Shows a notification message the UI. The position and behavior of the message depends on the type, which is one of the basic types defined in Notification, for instance Notification.TYPE_WARNING_MESSAGE. Care should be taken to to avoid XSS vulnerabilities as the caption is rendered as html.

Parameters:

caption - The message

type - The message type

See Also:

showNotification(Notification), Notification

showNotification

@Deprecated
public void showNotification(java.lang.String caption,
                                        java.lang.String description)

Deprecated. As of 7.0, use new Notification(...).show(Page) instead but be aware that HTML by default not allowed.

Shows a notification consisting of a bigger caption and a smaller description on the middle of the UI. The message automatically disappears ("humanized message"). Care should be taken to to avoid XSS vulnerabilities as the caption and description are rendered as html.

Parameters:

caption - The caption of the message

description - The message description

See Also:

showNotification(Notification), Notification

showNotification

@Deprecated
public void showNotification(java.lang.String caption,
                                        java.lang.String description,
                                        Notification.Type type)

Deprecated. As of 7.0, use new Notification(...).show(Page) instead but be aware that HTML by default not allowed.

Shows a notification consisting of a bigger caption and a smaller description. The position and behavior of the message depends on the type, which is one of the basic types defined in Notification , for instance Notification.TYPE_WARNING_MESSAGE. Care should be taken to to avoid XSS vulnerabilities as the caption and description are rendered as html.

Parameters:

caption - The caption of the message

description - The message description

type - The message type

See Also:

showNotification(Notification), Notification

showNotification

@Deprecated
public void showNotification(java.lang.String caption,
                                        java.lang.String description,
                                        Notification.Type type,
                                        boolean htmlContentAllowed)

Deprecated. As of 7.0, use new Notification(...).show(Page).

Shows a notification consisting of a bigger caption and a smaller description. The position and behavior of the message depends on the type, which is one of the basic types defined in Notification , for instance Notification.TYPE_WARNING_MESSAGE. Care should be taken to avoid XSS vulnerabilities if html content is allowed.

Parameters:

caption - The message caption

description - The message description

type - The type of message

htmlContentAllowed - Whether html in the caption and description should be displayed as html or as plain text

See Also:

showNotification(Notification), Notification

showNotification

@Deprecated
public void showNotification(Notification notification)

Deprecated. As of 7.0, use Notification.show instead

Shows a notification message.

Parameters:

notification - The notification message to show

See Also:

Notification, showNotification(String), #showNotification(String, int), showNotification(String, String), #showNotification(String, String, int)

getLastHeartbeatTime

public long getLastHeartbeatTime()

Returns the timestamp (milliseconds since the epoch) of the last received heartbeat for this UI.

Returns:

The time the last heartbeat request occurred.

See Also:

#heartbeat(), VaadinServiceSession.cleanupInactiveUIs()

getLastUidlRequestTime

public long getLastUidlRequestTime()

Returns the timestamp (milliseconds since the epoch) of the last received UIDL request for this UI.

Returns:

setLastHeartbeatTime

public void setLastHeartbeatTime(long lastHeartbeat)

Sets the last heartbeat request timestamp for this UI. Called by the framework whenever the application receives a valid heartbeat request for this UI.

setLastUidlRequestTime

public void setLastUidlRequestTime(long lastUidlRequest)

Sets the last UIDL request timestamp for this UI. Called by the framework whenever the application receives a valid UIDL request for this UI.

getTheme

public java.lang.String getTheme()

Gets the theme that was used when the UI was initialized.

Returns:

the theme name