javafx.scene.control

Class ListView.ListViewFocusModel<T>

java.lang.Object

javafx.scene.control.FocusModel<T>

javafx.scene.control.ListView.ListViewFocusModel<T>

Enclosing class:

ListView<T>

static class ListView.ListViewFocusModel<T>
extends FocusModel<T>

Field Summary

Fields

Modifier and Type	Field and Description
private int	itemCount
private ListChangeListener<T>	itemsContentListener
private InvalidationListener	itemsObserver
private ListView<T>	listView
private WeakListChangeListener<T>	weakItemsContentListener

Constructor Summary

Constructors

Constructor and Description
ListViewFocusModel(ListView<T> listView)

Method Summary

Modifier and Type	Method and Description
protected int	getItemCount() Returns the number of items in the data model that underpins the control.
protected T	getModelItem(int index) Returns the item at the given index.
private boolean	isEmpty()
private void	updateItemCount()
private void	updateItemsObserver(ObservableList<T> oldList, ObservableList<T> newList)

Methods inherited from class javafx.scene.control.FocusModel

focus, focusedIndexProperty, focusedItemProperty, focusNext, focusPrevious, getFocusedIndex, getFocusedItem, isFocused, setFocusedIndex, setFocusedItem

Methods inherited from class java.lang.Object

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

Field Detail

listView

private final ListView<T> listView

itemCount

private int itemCount

itemsObserver

private final InvalidationListener itemsObserver

itemsContentListener

private final ListChangeListener<T> itemsContentListener

weakItemsContentListener

private WeakListChangeListener<T> weakItemsContentListener

Constructor Detail

ListViewFocusModel

public ListViewFocusModel(ListView<T> listView)

Method Detail

updateItemsObserver

private void updateItemsObserver(ObservableList<T> oldList,
                                 ObservableList<T> newList)

getItemCount

protected int getItemCount()

Description copied from class: FocusModel

Returns the number of items in the data model that underpins the control. An example would be that a ListView focus model would likely return listView.getItems().size(). The valid range of focusable indices is between 0 and whatever is returned by this method.

Specified by:

getItemCount in class FocusModel<T>

getModelItem

protected T getModelItem(int index)

Description copied from class: FocusModel

Returns the item at the given index. An example using ListView would be listView.getItems().get(index).

Specified by:

getModelItem in class FocusModel<T>

Parameters:

index - The index of the item that is requested from the underlying data model.

Returns:

Returns null if the index is out of bounds, or an element of type T that is related to the given index.

isEmpty

private boolean isEmpty()

updateItemCount

private void updateItemCount()