CellBasedWidgetImpl (GWT Javadoc)

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## com.google.gwt.user.cellview.client
Class CellBasedWidgetImpl

    java.lang.Object
      com.google.gwt.user.cellview.client.CellBasedWidgetImpl

Direct Known Subclasses:
  CellBasedWidgetImplStandard, CellBasedWidgetImplTrident

    abstract class CellBasedWidgetImpl

extends java.lang.Object

Implementation used by various cell based widgets.

Field Summary
`(package private) java.util.Set<java.lang.String>` | `focusableTypes` The set of natively focusable elements.

Constructor Summary
`CellBasedWidgetImpl()`

Method Summary
`static CellBasedWidgetImpl` | `get()` Get the singleton instance.
`boolean` | `isFocusable(Element elem)` Check if an element is focusable.
`void` | `onBrowserEvent(Widget widget, Event event)` Process an event on a target cell.
`SafeHtml` | `processHtml(SafeHtml html)` Takes in an html string and processes it, adding support for events.
`void` | `resetFocus(Scheduler.ScheduledCommand command)` Reset focus on an element.
`protected int` | `sinkEvent(Widget widget, java.lang.String typeName)` Get the event bits to sink for an event type.
`void` | `sinkEvents(Widget widget, java.util.Set<java.lang.String> typeNames)` Sink events on the widget.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### focusableTypes

    final java.util.Set<java.lang.String> focusableTypes

  The set of natively focusable elements.

Constructor Detail

### CellBasedWidgetImpl

    CellBasedWidgetImpl()

Method Detail

### get

    public static CellBasedWidgetImpl get()

  Get the singleton instance.

  Returns:
    the `CellBasedWidgetImpl` instance

### isFocusable

    public boolean isFocusable(Element elem)

  Check if an element is focusable. If an element is focusable, the cell widget should not steal focus from it.

  Parameters:
    `elem` - the element
  Returns:
    true if the element is focusable, false if not

### onBrowserEvent

    public void onBrowserEvent(Widget widget,
                               Event event)

  Process an event on a target cell.

  Parameters:
    `widget` - the `Widget` on which the event occurred
    `event` - the event to handle

### processHtml

    public SafeHtml processHtml(SafeHtml html)

  Takes in an html string and processes it, adding support for events.

  Parameters:
    `html` - the html string to process
  Returns:
    the processed html string

### resetFocus

    public void resetFocus(Scheduler.ScheduledCommand command)

  Reset focus on an element.

  Parameters:
    `command` - the command to execute when resetting focus

### sinkEvents

    public final void sinkEvents(Widget widget,
                                 java.util.Set<java.lang.String> typeNames)

  Sink events on the widget.

  Parameters:
    `widget` - the `Widget` that will handle the events
    `typeNames` - the names of the events to sink

### sinkEvent

    protected int sinkEvent(Widget widget,
                            java.lang.String typeName)

  Get the event bits to sink for an event type.

  Parameters:
    `widget` - the `Widget` that will handle the events
    `typeName` - the name of the event to sink
  Returns:
    the event bits to sink, or -1 if no events to sink

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