Skip navigation links

oracle.ide.controls
Class NonNullableComboBoxModel

java.lang.Object
javax.swing.AbstractListModel
javax.swing.DefaultComboBoxModel
oracle.ide.controls.NonNullableComboBoxModel

All Implemented Interfaces:

java.io.Serializable, javax.swing.ComboBoxModel, javax.swing.ListModel, javax.swing.MutableComboBoxModel

public class NonNullableComboBoxModel

extends javax.swing.DefaultComboBoxModel

The NonNullableComboBoxModel is a simple class for ensuring that a JComboBox will always have an item selected (if that we start with a non-empty list.) This will prevent the user from Control-clicking in the list to unselect the selected item in the JComboBox.

This can be used to guarantee that there is always a selected item in the combo box model. If the user attempts to unselect an item, the previously selected item will remain selected. The selection will be empty only if the combo box model is empty.

See Also:

Serialized Form

Field Summary

Fields inherited from class javax.swing.AbstractListModel

listenerList

Constructor Summary

NonNullableComboBoxModel()
Constructs an empty combo box model.

NonNullableComboBoxModel(java.lang.Object[] items)
Constructs a new NonNullableComboBoxModel with the specified list of objects.

Method Summary

void	setSelectedItem(java.lang.Object anObject) Sets the selected item of the combo box model to the specified object.

Methods inherited from class javax.swing.DefaultComboBoxModel

addElement, getElementAt, getIndexOf, getSelectedItem, getSize, insertElementAt, removeAllElements, removeElement, removeElementAt

Methods inherited from class javax.swing.AbstractListModel

addListDataListener, fireContentsChanged, fireIntervalAdded, fireIntervalRemoved, getListDataListeners, getListeners, removeListDataListener

Methods inherited from class java.lang.Object

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

Methods inherited from interface javax.swing.ListModel

addListDataListener, removeListDataListener

Constructor Detail

NonNullableComboBoxModel

public NonNullableComboBoxModel()

Constructs an empty combo box model.

NonNullableComboBoxModel

public NonNullableComboBoxModel(java.lang.Object[] items)

Constructs a new NonNullableComboBoxModel with the specified list of objects.

Parameters:

items - an array of Objects to use for the model

Method Detail

setSelectedItem

public void setSelectedItem(java.lang.Object anObject)

Sets the selected item of the combo box model to the specified object. This overrides the default behavior to prevent the selected item from being set to null. This means the user can't hit "Ctrl-click" to unselect an item in the JComboBox.

Specified by:

setSelectedItem in interface javax.swing.ComboBoxModel

Overrides:

setSelectedItem in class javax.swing.DefaultComboBoxModel

Parameters:

anObject - the object to set as the selected item

Skip navigation links