Module javafx.controls

Package javafx.scene.control

Class SingleSelectionModel<T>

java.lang.Object

javafx.scene.control.SelectionModel<T>

javafx.scene.control.SingleSelectionModel<T>

Type Parameters:

T - The type of the item contained in the control that can be selected.

public abstract class SingleSelectionModel<T>
extends SelectionModel<T>

A SelectionModel which enforces the requirement that only a single index be selected at any given time. This class exists for controls that allow for pluggable selection models, but which do not allow for multiple selection. A good example is the ChoiceBox control. Conversely, most other controls (ListView, TreeView, TableView, etc) require MultipleSelectionModel implementations (although MultipleSelectionModel does still allow for single selection to be set via the selectionMode property).

Since:

JavaFX 2.0

See Also:

• SelectionModel
• MultipleSelectionModel
• SelectionMode

Property Summary

Properties declared in class javafx.scene.control.SelectionModel

selectedIndex, selectedItem

Constructor Summary

Constructors

Constructor	Description
SingleSelectionModel()	Creates a default SingleSelectionModel instance.

Method Summary

Modifier and Type	Method	Description
void	clearAndSelect(int index)	In the SingleSelectionModel, this method is functionally equivalent to calling select(index), as only one selection is allowed at a time.
void	clearSelection()	Clears the selection model of all selected indices.
void	clearSelection(int index)	Clears the selection of the given index, if it is currently selected.
protected abstract int	getItemCount()	Gets the number of items available for the selection model.
protected abstract T	getModelItem(int index)	Gets the data model item associated with a specific index.
boolean	isEmpty()	This method is available to test whether there are any selected indices/items.
boolean	isSelected(int index)	This method will return true if the given index is the currently selected index in this SingleSelectionModel.
void	select(int index)	Selects the given index.
void	select(T obj)	Selects the index for the first instance of given object in the underlying data model.
void	selectFirst()	Selects the first index.
void	selectLast()	Selects the last index.
void	selectNext()	Selects the next index.
void	selectPrevious()	Selects the previous index.

Methods declared in class javafx.scene.control.SelectionModel

getSelectedIndex, getSelectedItem, selectedIndexProperty, selectedItemProperty, setSelectedIndex, setSelectedItem

Methods declared in class java.lang.Object

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

Constructor Details

SingleSelectionModel

public SingleSelectionModel()

Creates a default SingleSelectionModel instance.

Method Details

clearSelection

public void clearSelection()

Clears the selection model of all selected indices.

Specified by:

clearSelection in class SelectionModel<T>

clearSelection

public void clearSelection(int index)

Clears the selection of the given index, if it is currently selected.

Specified by:

clearSelection in class SelectionModel<T>

Parameters:

index - The selected item to deselect.

isEmpty

public boolean isEmpty()

This method is available to test whether there are any selected indices/items. It will return true if there are no selected items, and false if there are.

Specified by:

isEmpty in class SelectionModel<T>

Returns:

Will return true if there are no selected items, and false if there are.

isSelected

public boolean isSelected(int index)

This method will return true if the given index is the currently selected index in this SingleSelectionModel.

Specified by:

isSelected in class SelectionModel<T>

Parameters:

index - The index to check as to whether it is currently selected or not.

Returns:

True if the given index is selected, false otherwise.

clearAndSelect

public void clearAndSelect(int index)

In the SingleSelectionModel, this method is functionally equivalent to calling select(index), as only one selection is allowed at a time.

Specified by:

clearAndSelect in class SelectionModel<T>

Parameters:

index - The index that should be the only selected index in this selection model.

select

public void select(T obj)

Selects the index for the first instance of given object in the underlying data model. Since the SingleSelectionModel can only support having a single index selected at a time, this also causes any previously selected index to be unselected.

Specified by:

select in class SelectionModel<T>

Parameters:

obj - The object to attempt to select in the underlying data model.

select

public void select(int index)

Selects the given index. Since the SingleSelectionModel can only support having a single index selected at a time, this also causes any previously selected index to be unselected.

Specified by:

select in class SelectionModel<T>

Parameters:

index - The position of the item to select in the selection model.

selectPrevious

public void selectPrevious()

Selects the previous index. Since the SingleSelectionModel can only support having a single index selected at a time, this also causes any previously selected index to be unselected.

Specified by:

selectPrevious in class SelectionModel<T>

selectNext

public void selectNext()

Selects the next index. Since the SingleSelectionModel can only support having a single index selected at a time, this also causes any previously selected index to be unselected.

Specified by:

selectNext in class SelectionModel<T>

selectFirst

public void selectFirst()

Selects the first index. Since the SingleSelectionModel can only support having a single index selected at a time, this also causes any previously selected index to be unselected.

Specified by:

selectFirst in class SelectionModel<T>

selectLast

public void selectLast()

Selects the last index. Since the SingleSelectionModel can only support having a single index selected at a time, this also causes any previously selected index to be unselected.

Specified by:

selectLast in class SelectionModel<T>

getModelItem

protected abstract T getModelItem(int index)

Gets the data model item associated with a specific index.

Parameters:

index - The position of the item in the underlying data model.

Returns:

The item that exists at the given index.

getItemCount

protected abstract int getItemCount()

Gets the number of items available for the selection model. If the number of items can change dynamically, it is the responsibility of the concrete SingleSelectionModel implementation to ensure that items are selected or unselected as appropriate as the items change.

Returns:

A number greater than or equal to 0.