com.google.gwt.view.client

Class CellPreviewEvent<T>

java.lang.Object

com.google.web.bindery.event.shared.Event<H>

com.google.gwt.event.shared.GwtEvent<CellPreviewEvent.Handler<T>>

com.google.gwt.view.client.CellPreviewEvent<T>

Type Parameters:

T - the data type of the HasData source

public class CellPreviewEvent<T>
extends GwtEvent<CellPreviewEvent.Handler<T>>

Allows the previewing of events before they are fired to Cells.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	CellPreviewEvent.Handler<T> Handler for CellPreviewEvent.

Nested classes/interfaces inherited from class com.google.gwt.event.shared.GwtEvent

GwtEvent.Type<H>

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	CellPreviewEvent(NativeEvent nativeEvent, HasData<T> display, Cell.Context context, T value, boolean isCellEditing, boolean isSelectionHandled) Construct a new CellPreviewEvent.

Method Summary

Modifier and Type	Method and Description
protected void	dispatch(CellPreviewEvent.Handler<T> handler) Should only be called by HandlerManager.
static <T> CellPreviewEvent<T>	fire(HasCellPreviewHandlers<T> source, NativeEvent nativeEvent, HasData<T> display, Cell.Context context, T value, boolean isCellEditing, boolean isSelectionHandled) Fires a cell preview event on all registered handlers in the handler manager.
GwtEvent.Type<CellPreviewEvent.Handler<T>>	getAssociatedType() Returns the Event.Type used to register this event, allowing an EventBus to find handlers of the appropriate class.
int	getColumn() Get the column index of the Cell where the event occurred if the source is a table.
Cell.Context	getContext() Get the cell Cell.Context.
HasData<T>	getDisplay() Get the HasData source of the event.
int	getIndex() Get the index of the value where the event occurred.
NativeEvent	getNativeEvent() Get the NativeEvent to preview.
static GwtEvent.Type<CellPreviewEvent.Handler<?>>	getType() Gets the type associated with this event.
T	getValue() Get the value where the event occurred.
boolean	isCanceled() Check if the event has been canceled.
boolean	isCellEditing() Check whether or not the cell where the event occurred is being edited.
boolean	isSelectionHandled() Check whether or not selection is being handled by the widget or one of its Cells.
void	setCanceled(boolean cancel) Cancel the event and prevent it from firing to the Cell.

Methods inherited from class com.google.gwt.event.shared.GwtEvent

assertLive, getSource, isLive, kill, revive

Methods inherited from class com.google.web.bindery.event.shared.Event

setSource, toDebugString, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

CellPreviewEvent

protected CellPreviewEvent(NativeEvent nativeEvent,
                           HasData<T> display,
                           Cell.Context context,
                           T value,
                           boolean isCellEditing,
                           boolean isSelectionHandled)

Construct a new CellPreviewEvent.

Parameters:

nativeEvent - the event to preview

display - the HasData source of the event

context - the Cell Cell.Context

value - the value where the event occurred

isCellEditing - indicates whether or not the cell is being edited

isSelectionHandled - indicates whether or not selection is handled

Method Detail

fire

public static <T> CellPreviewEvent<T> fire(HasCellPreviewHandlers<T> source,
                                           NativeEvent nativeEvent,
                                           HasData<T> display,
                                           Cell.Context context,
                                           T value,
                                           boolean isCellEditing,
                                           boolean isSelectionHandled)

Fires a cell preview event on all registered handlers in the handler manager. If no such handlers exist, this implementation will do nothing. This implementation sets the column to 0.

Type Parameters:

T - the old value type

Parameters:

source - the source of the handlers

nativeEvent - the event to preview

display - the HasData source of the event

context - the Cell Cell.Context

value - the value where the event occurred

isCellEditing - indicates whether or not the cell is being edited

isSelectionHandled - indicates whether or not selection is handled

Returns:

the CellPreviewEvent that was fired

getType

public static GwtEvent.Type<CellPreviewEvent.Handler<?>> getType()

Gets the type associated with this event.

Returns:

returns the handler type

getAssociatedType

public GwtEvent.Type<CellPreviewEvent.Handler<T>> getAssociatedType()

Description copied from class: Event

Returns the Event.Type used to register this event, allowing an EventBus to find handlers of the appropriate class.

Specified by:

getAssociatedType in class GwtEvent<CellPreviewEvent.Handler<T>>

Returns:

the type

getColumn

public int getColumn()

Get the column index of the Cell where the event occurred if the source is a table. If the source is not a table, the column is always 0.

Returns:

the column index, or 0 if there is only one column

getContext

public Cell.Context getContext()

Get the cell Cell.Context.

Returns:

the cell Cell.Context

getDisplay

public HasData<T> getDisplay()

Get the HasData source of the event.

getIndex

public int getIndex()

Get the index of the value where the event occurred.

getNativeEvent

public NativeEvent getNativeEvent()

Get the NativeEvent to preview.

getValue

public T getValue()

Get the value where the event occurred.

isCanceled

public boolean isCanceled()

Check if the event has been canceled.

Returns:

true if the event has been canceled

See Also:

setCanceled(boolean)

isCellEditing

public boolean isCellEditing()

Check whether or not the cell where the event occurred is being edited.

Returns:

true if the cell is being edited, false if not

isSelectionHandled

public boolean isSelectionHandled()

Check whether or not selection is being handled by the widget or one of its Cells.

Returns:

true if selection is handled by the widget

setCanceled

public void setCanceled(boolean cancel)

Cancel the event and prevent it from firing to the Cell.

Parameters:

cancel - true to cancel the event, false to allow it

dispatch

protected void dispatch(CellPreviewEvent.Handler<T> handler)

Description copied from class: GwtEvent

Should only be called by HandlerManager. In other words, do not use or call.

Specified by:

dispatch in class GwtEvent<CellPreviewEvent.Handler<T>>

Parameters:

handler - handler

See Also:

EventBus.dispatchEvent(Event, Object)