mirror of git://gcc.gnu.org/git/gcc.git
1500 lines
43 KiB
Java
1500 lines
43 KiB
Java
/* JComboBox.java --
|
|
Copyright (C) 2002, 2004, 2005, 2006, Free Software Foundation, Inc.
|
|
|
|
This file is part of GNU Classpath.
|
|
|
|
GNU Classpath is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
any later version.
|
|
|
|
GNU Classpath is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GNU Classpath; see the file COPYING. If not, write to the
|
|
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
|
02110-1301 USA.
|
|
|
|
Linking this library statically or dynamically with other modules is
|
|
making a combined work based on this library. Thus, the terms and
|
|
conditions of the GNU General Public License cover the whole
|
|
combination.
|
|
|
|
As a special exception, the copyright holders of this library give you
|
|
permission to link this library with independent modules to produce an
|
|
executable, regardless of the license terms of these independent
|
|
modules, and to copy and distribute the resulting executable under
|
|
terms of your choice, provided that you also meet, for each linked
|
|
independent module, the terms and conditions of the license of that
|
|
module. An independent module is a module which is not derived from
|
|
or based on this library. If you modify this library, you may extend
|
|
this exception to your version of the library, but you are not
|
|
obligated to do so. If you do not wish to do so, delete this
|
|
exception statement from your version. */
|
|
|
|
|
|
package javax.swing;
|
|
|
|
import gnu.java.lang.CPStringBuilder;
|
|
|
|
import java.awt.ItemSelectable;
|
|
import java.awt.event.ActionEvent;
|
|
import java.awt.event.ActionListener;
|
|
import java.awt.event.ItemEvent;
|
|
import java.awt.event.ItemListener;
|
|
import java.awt.event.KeyEvent;
|
|
import java.beans.PropertyChangeEvent;
|
|
import java.beans.PropertyChangeListener;
|
|
import java.util.Vector;
|
|
|
|
import javax.accessibility.Accessible;
|
|
import javax.accessibility.AccessibleAction;
|
|
import javax.accessibility.AccessibleContext;
|
|
import javax.accessibility.AccessibleRole;
|
|
import javax.accessibility.AccessibleSelection;
|
|
import javax.swing.event.ListDataEvent;
|
|
import javax.swing.event.ListDataListener;
|
|
import javax.swing.event.PopupMenuEvent;
|
|
import javax.swing.event.PopupMenuListener;
|
|
import javax.swing.plaf.ComboBoxUI;
|
|
import javax.swing.plaf.ComponentUI;
|
|
import javax.swing.plaf.basic.ComboPopup;
|
|
|
|
/**
|
|
* A component that allows a user to select any item in its list and
|
|
* displays the selected item to the user. JComboBox also can show/hide a
|
|
* popup menu containing its list of item whenever the mouse is pressed
|
|
* over it.
|
|
*
|
|
* @author Andrew Selkirk
|
|
* @author Olga Rodimina
|
|
* @author Robert Schuster
|
|
*/
|
|
public class JComboBox extends JComponent implements ItemSelectable,
|
|
ListDataListener,
|
|
ActionListener,
|
|
Accessible
|
|
{
|
|
|
|
private static final long serialVersionUID = 5654585963292734470L;
|
|
|
|
/**
|
|
* Classes implementing this interface are
|
|
* responsible for matching key characters typed by the user with combo
|
|
* box's items.
|
|
*/
|
|
public static interface KeySelectionManager
|
|
{
|
|
int selectionForKey(char aKey, ComboBoxModel aModel);
|
|
}
|
|
|
|
/**
|
|
* Maximum number of rows that should be visible by default in the
|
|
* JComboBox's popup
|
|
*/
|
|
private static final int DEFAULT_MAXIMUM_ROW_COUNT = 8;
|
|
|
|
/**
|
|
* Data model used by JComboBox to keep track of its list data and currently
|
|
* selected element in the list.
|
|
*/
|
|
protected ComboBoxModel dataModel;
|
|
|
|
/**
|
|
* Renderer renders(paints) every object in the combo box list in its
|
|
* associated list cell. This ListCellRenderer is used only when this
|
|
* JComboBox is uneditable.
|
|
*/
|
|
protected ListCellRenderer renderer;
|
|
|
|
/**
|
|
* Editor that is responsible for editing an object in a combo box list.
|
|
*/
|
|
protected ComboBoxEditor editor;
|
|
|
|
/**
|
|
* Number of rows that will be visible in the JComboBox's popup.
|
|
*/
|
|
protected int maximumRowCount;
|
|
|
|
/**
|
|
* This field indicates if textfield of this JComboBox is editable or not.
|
|
*/
|
|
protected boolean isEditable;
|
|
|
|
/**
|
|
* This field is reference to the current selection of the combo box.
|
|
*/
|
|
protected Object selectedItemReminder;
|
|
|
|
/**
|
|
* keySelectionManager
|
|
*/
|
|
protected KeySelectionManager keySelectionManager;
|
|
|
|
/**
|
|
* This actionCommand is used in ActionEvent that is fired to JComboBox's
|
|
* ActionListeneres.
|
|
*/
|
|
protected String actionCommand;
|
|
|
|
/**
|
|
* This property indicates if heavyweight popup or lightweight popup will be
|
|
* used to diplay JComboBox's elements.
|
|
*/
|
|
protected boolean lightWeightPopupEnabled;
|
|
|
|
/**
|
|
* The action taken when new item is selected in the JComboBox
|
|
*/
|
|
private Action action;
|
|
|
|
/**
|
|
* since 1.4 If this field is set then comboBox's display area for the
|
|
* selected item will be set by default to this value.
|
|
*/
|
|
private Object prototypeDisplayValue;
|
|
|
|
/**
|
|
* Constructs JComboBox object with specified data model for it.
|
|
* <p>Note that the JComboBox will not change the value that
|
|
* is preselected by your ComboBoxModel implementation.</p>
|
|
*
|
|
* @param model Data model that will be used by this JComboBox to keep track
|
|
* of its list of items.
|
|
*/
|
|
public JComboBox(ComboBoxModel model)
|
|
{
|
|
setEditable(false);
|
|
setEnabled(true);
|
|
setMaximumRowCount(DEFAULT_MAXIMUM_ROW_COUNT);
|
|
setModel(model);
|
|
setActionCommand("comboBoxChanged");
|
|
|
|
lightWeightPopupEnabled = true;
|
|
isEditable = false;
|
|
|
|
updateUI();
|
|
}
|
|
|
|
/**
|
|
* Constructs JComboBox with specified list of items.
|
|
*
|
|
* @param itemArray array containing list of items for this JComboBox
|
|
*/
|
|
public JComboBox(Object[] itemArray)
|
|
{
|
|
this(new DefaultComboBoxModel(itemArray));
|
|
|
|
if (itemArray.length > 0)
|
|
setSelectedIndex(0);
|
|
}
|
|
|
|
/**
|
|
* Constructs JComboBox object with specified list of items.
|
|
*
|
|
* @param itemVector vector containing list of items for this JComboBox.
|
|
*/
|
|
public JComboBox(Vector<?> itemVector)
|
|
{
|
|
this(new DefaultComboBoxModel(itemVector));
|
|
|
|
if (itemVector.size() > 0)
|
|
setSelectedIndex(0);
|
|
}
|
|
|
|
/**
|
|
* Constructor. Creates new empty JComboBox. ComboBox's data model is set to
|
|
* DefaultComboBoxModel.
|
|
*/
|
|
public JComboBox()
|
|
{
|
|
this(new DefaultComboBoxModel());
|
|
}
|
|
|
|
/**
|
|
* This method returns true JComboBox is editable and false otherwise
|
|
*
|
|
* @return boolean true if JComboBox is editable and false otherwise
|
|
*/
|
|
public boolean isEditable()
|
|
{
|
|
return isEditable;
|
|
}
|
|
|
|
/*
|
|
* This method adds ancestor listener to this JComboBox.
|
|
*/
|
|
protected void installAncestorListener()
|
|
{
|
|
/* FIXME: Need to implement.
|
|
*
|
|
* Need to add ancestor listener to this JComboBox. This listener
|
|
* should close combo box's popup list of items whenever it
|
|
* receives an AncestorEvent.
|
|
*/
|
|
}
|
|
|
|
/**
|
|
* Set the "UI" property of the combo box, which is a look and feel class
|
|
* responsible for handling comboBox's input events and painting it.
|
|
*
|
|
* @param ui The new "UI" property
|
|
*/
|
|
public void setUI(ComboBoxUI ui)
|
|
{
|
|
super.setUI(ui);
|
|
}
|
|
|
|
/**
|
|
* This method sets this comboBox's UI to the UIManager's default for the
|
|
* current look and feel.
|
|
*/
|
|
public void updateUI()
|
|
{
|
|
setUI((ComboBoxUI) UIManager.getUI(this));
|
|
}
|
|
|
|
/**
|
|
* This method returns the String identifier for the UI class to the used
|
|
* with the JComboBox.
|
|
*
|
|
* @return The String identifier for the UI class.
|
|
*/
|
|
public String getUIClassID()
|
|
{
|
|
return "ComboBoxUI";
|
|
}
|
|
|
|
/**
|
|
* This method returns the UI used to display the JComboBox.
|
|
*
|
|
* @return The UI used to display the JComboBox.
|
|
*/
|
|
public ComboBoxUI getUI()
|
|
{
|
|
return (ComboBoxUI) ui;
|
|
}
|
|
|
|
/**
|
|
* Set the data model for this JComboBox. This un-registers all listeners
|
|
* associated with the current model, and re-registers them with the new
|
|
* model.
|
|
*
|
|
* @param newDataModel The new data model for this JComboBox
|
|
*/
|
|
public void setModel(ComboBoxModel newDataModel)
|
|
{
|
|
// dataModel is null if it this method is called from inside the constructors.
|
|
if (dataModel != null)
|
|
{
|
|
// Prevents unneccessary updates.
|
|
if (dataModel == newDataModel)
|
|
return;
|
|
|
|
// Removes itself (as DataListener) from the to-be-replaced model.
|
|
dataModel.removeListDataListener(this);
|
|
}
|
|
|
|
/* Adds itself as a DataListener to the new model.
|
|
* It is intentioned that this operation will fail with a NullPointerException if the
|
|
* caller delivered a null argument.
|
|
*/
|
|
newDataModel.addListDataListener(this);
|
|
|
|
// Stores old data model for event notification.
|
|
ComboBoxModel oldDataModel = dataModel;
|
|
dataModel = newDataModel;
|
|
selectedItemReminder = newDataModel.getSelectedItem();
|
|
|
|
// Notifies the listeners of the model change.
|
|
firePropertyChange("model", oldDataModel, dataModel);
|
|
}
|
|
|
|
/**
|
|
* This method returns data model for this comboBox.
|
|
*
|
|
* @return ComboBoxModel containing items for this combo box.
|
|
*/
|
|
public ComboBoxModel getModel()
|
|
{
|
|
return dataModel;
|
|
}
|
|
|
|
/**
|
|
* This method sets JComboBox's popup to be either lightweight or
|
|
* heavyweight. If 'enabled' is true then lightweight popup is used and
|
|
* heavyweight otherwise. By default lightweight popup is used to display
|
|
* this JComboBox's elements.
|
|
*
|
|
* @param enabled indicates if lightweight popup or heavyweight popup should
|
|
* be used to display JComboBox's elements.
|
|
*/
|
|
public void setLightWeightPopupEnabled(boolean enabled)
|
|
{
|
|
lightWeightPopupEnabled = enabled;
|
|
}
|
|
|
|
/**
|
|
* This method returns whether popup menu that is used to display list of
|
|
* combo box's item is lightWeight or not.
|
|
*
|
|
* @return boolean true if popup menu is lightweight and false otherwise.
|
|
*/
|
|
public boolean isLightWeightPopupEnabled()
|
|
{
|
|
return lightWeightPopupEnabled;
|
|
}
|
|
|
|
/**
|
|
* This method sets editability of the combo box. If combo box is editable
|
|
* the user can choose component from the combo box list by typing
|
|
* component's name in the editor(JTextfield by default). Otherwise if not
|
|
* editable, the user should use the list to choose the component. This
|
|
* method fires PropertyChangeEvents to JComboBox's registered
|
|
* PropertyChangeListeners to indicate that 'editable' property of the
|
|
* JComboBox has changed.
|
|
*
|
|
* @param editable indicates if the JComboBox's textfield should be editable
|
|
* or not.
|
|
*/
|
|
public void setEditable(boolean editable)
|
|
{
|
|
if (isEditable != editable)
|
|
{
|
|
isEditable = editable;
|
|
firePropertyChange("editable", !isEditable, isEditable);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Sets number of rows that should be visible in this JComboBox's popup. If
|
|
* this JComboBox's popup has more elements that maximum number or rows
|
|
* then popup will have a scroll pane to allow users to view other
|
|
* elements.
|
|
*
|
|
* @param rowCount number of rows that will be visible in JComboBox's popup.
|
|
*/
|
|
public void setMaximumRowCount(int rowCount)
|
|
{
|
|
if (maximumRowCount != rowCount)
|
|
{
|
|
int oldMaximumRowCount = maximumRowCount;
|
|
maximumRowCount = rowCount;
|
|
firePropertyChange("maximumRowCount", oldMaximumRowCount,
|
|
maximumRowCount);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This method returns number of rows visible in the JComboBox's list of
|
|
* items.
|
|
*
|
|
* @return int maximun number of visible rows in the JComboBox's list.
|
|
*/
|
|
public int getMaximumRowCount()
|
|
{
|
|
return maximumRowCount;
|
|
}
|
|
|
|
/**
|
|
* This method sets cell renderer for this JComboBox that will be used to
|
|
* paint combo box's items. The Renderer should only be used only when
|
|
* JComboBox is not editable. In the case when JComboBox is editable the
|
|
* editor must be used. This method also fires PropertyChangeEvent when
|
|
* cellRendered for this JComboBox has changed.
|
|
*
|
|
* @param aRenderer cell renderer that will be used by this JComboBox to
|
|
* paint its elements.
|
|
*/
|
|
public void setRenderer(ListCellRenderer aRenderer)
|
|
{
|
|
if (renderer != aRenderer)
|
|
{
|
|
ListCellRenderer oldRenderer = renderer;
|
|
renderer = aRenderer;
|
|
firePropertyChange("renderer", oldRenderer, renderer);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This method returns renderer responsible for rendering selected item in
|
|
* the combo box
|
|
*
|
|
* @return ListCellRenderer
|
|
*/
|
|
public ListCellRenderer getRenderer()
|
|
{
|
|
return renderer;
|
|
}
|
|
|
|
/**
|
|
* Sets editor for this JComboBox
|
|
*
|
|
* @param newEditor ComboBoxEditor for this JComboBox. This method fires
|
|
* PropertyChangeEvent when 'editor' property is changed.
|
|
*/
|
|
public void setEditor(ComboBoxEditor newEditor)
|
|
{
|
|
if (editor == newEditor)
|
|
return;
|
|
|
|
if (editor != null)
|
|
editor.removeActionListener(this);
|
|
|
|
ComboBoxEditor oldEditor = editor;
|
|
editor = newEditor;
|
|
|
|
if (editor != null)
|
|
editor.addActionListener(this);
|
|
|
|
firePropertyChange("editor", oldEditor, editor);
|
|
}
|
|
|
|
/**
|
|
* Returns editor component that is responsible for displaying/editing
|
|
* selected item in the combo box.
|
|
*
|
|
* @return ComboBoxEditor
|
|
*/
|
|
public ComboBoxEditor getEditor()
|
|
{
|
|
return editor;
|
|
}
|
|
|
|
/**
|
|
* Forces combo box to select given item
|
|
*
|
|
* @param item element in the combo box to select.
|
|
*/
|
|
public void setSelectedItem(Object item)
|
|
{
|
|
dataModel.setSelectedItem(item);
|
|
fireActionEvent();
|
|
}
|
|
|
|
/**
|
|
* Returns currently selected item in the combo box.
|
|
* The result may be <code>null</code> to indicate that nothing is
|
|
* currently selected.
|
|
*
|
|
* @return element that is currently selected in this combo box.
|
|
*/
|
|
public Object getSelectedItem()
|
|
{
|
|
return dataModel.getSelectedItem();
|
|
}
|
|
|
|
/**
|
|
* Forces JComboBox to select component located in the given index in the
|
|
* combo box.
|
|
* <p>If the index is below -1 or exceeds the upper bound an
|
|
* <code>IllegalArgumentException</code> is thrown.<p/>
|
|
* <p>If the index is -1 then no item gets selected.</p>
|
|
*
|
|
* @param index index specifying location of the component that should be
|
|
* selected.
|
|
*/
|
|
public void setSelectedIndex(int index)
|
|
{
|
|
if (index < -1 || index >= dataModel.getSize())
|
|
// Fails because index is out of bounds.
|
|
throw new IllegalArgumentException("illegal index: " + index);
|
|
else
|
|
// Selects the item at the given index or clears the selection if the
|
|
// index value is -1.
|
|
setSelectedItem((index == -1) ? null : dataModel.getElementAt(index));
|
|
}
|
|
|
|
/**
|
|
* Returns index of the item that is currently selected in the combo box. If
|
|
* no item is currently selected, then -1 is returned.
|
|
* <p>
|
|
* Note: For performance reasons you should minimize invocation of this
|
|
* method. If the data model is not an instance of
|
|
* <code>DefaultComboBoxModel</code> the complexity is O(n) where n is the
|
|
* number of elements in the combo box.
|
|
* </p>
|
|
*
|
|
* @return int Index specifying location of the currently selected item in the
|
|
* combo box or -1 if nothing is selected in the combo box.
|
|
*/
|
|
public int getSelectedIndex()
|
|
{
|
|
Object selectedItem = getSelectedItem();
|
|
|
|
if (selectedItem != null)
|
|
{
|
|
if (dataModel instanceof DefaultComboBoxModel)
|
|
// Uses special method of DefaultComboBoxModel to retrieve the index.
|
|
return ((DefaultComboBoxModel) dataModel).getIndexOf(selectedItem);
|
|
else
|
|
{
|
|
// Iterates over all items to retrieve the index.
|
|
int size = dataModel.getSize();
|
|
|
|
for (int i = 0; i < size; i++)
|
|
{
|
|
Object o = dataModel.getElementAt(i);
|
|
|
|
// XXX: Is special handling of ComparableS neccessary?
|
|
if ((selectedItem != null) ? selectedItem.equals(o) : o == null)
|
|
return i;
|
|
}
|
|
}
|
|
}
|
|
|
|
// returns that no item is currently selected
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* Returns an object that is used as the display value when calculating the
|
|
* preferred size for the combo box. This value is, of course, never
|
|
* displayed anywhere.
|
|
*
|
|
* @return The prototype display value (possibly <code>null</code>).
|
|
*
|
|
* @since 1.4
|
|
* @see #setPrototypeDisplayValue(Object)
|
|
*/
|
|
public Object getPrototypeDisplayValue()
|
|
{
|
|
return prototypeDisplayValue;
|
|
}
|
|
|
|
/**
|
|
* Sets the object that is assumed to be the displayed item when calculating
|
|
* the preferred size for the combo box. A {@link PropertyChangeEvent} (with
|
|
* the name <code>prototypeDisplayValue</code>) is sent to all registered
|
|
* listeners.
|
|
*
|
|
* @param value the new value (<code>null</code> permitted).
|
|
*
|
|
* @since 1.4
|
|
* @see #getPrototypeDisplayValue()
|
|
*/
|
|
public void setPrototypeDisplayValue(Object value)
|
|
{
|
|
Object oldValue = prototypeDisplayValue;
|
|
prototypeDisplayValue = value;
|
|
firePropertyChange("prototypeDisplayValue", oldValue, value);
|
|
}
|
|
|
|
/**
|
|
* This method adds given element to this JComboBox.
|
|
* <p>A <code>RuntimeException</code> is thrown if the data model is not
|
|
* an instance of {@link MutableComboBoxModel}.</p>
|
|
*
|
|
* @param element element to add
|
|
*/
|
|
public void addItem(Object element)
|
|
{
|
|
if (dataModel instanceof MutableComboBoxModel)
|
|
((MutableComboBoxModel) dataModel).addElement(element);
|
|
else
|
|
throw new RuntimeException("Unable to add the item because the data "
|
|
+ "model it is not an instance of "
|
|
+ "MutableComboBoxModel.");
|
|
}
|
|
|
|
/**
|
|
* Inserts given element at the specified index to this JComboBox.
|
|
* <p>A <code>RuntimeException</code> is thrown if the data model is not
|
|
* an instance of {@link MutableComboBoxModel}.</p>
|
|
*
|
|
* @param element element to insert
|
|
* @param index position where to insert the element
|
|
*/
|
|
public void insertItemAt(Object element, int index)
|
|
{
|
|
if (dataModel instanceof MutableComboBoxModel)
|
|
((MutableComboBoxModel) dataModel).insertElementAt(element, index);
|
|
else
|
|
throw new RuntimeException("Unable to insert the item because the data "
|
|
+ "model it is not an instance of "
|
|
+ "MutableComboBoxModel.");
|
|
}
|
|
|
|
/**
|
|
* This method removes given element from this JComboBox.
|
|
* <p>A <code>RuntimeException</code> is thrown if the data model is not
|
|
* an instance of {@link MutableComboBoxModel}.</p>
|
|
*
|
|
* @param element element to remove
|
|
*/
|
|
public void removeItem(Object element)
|
|
{
|
|
if (dataModel instanceof MutableComboBoxModel)
|
|
((MutableComboBoxModel) dataModel).removeElement(element);
|
|
else
|
|
throw new RuntimeException("Unable to remove the item because the data "
|
|
+ "model it is not an instance of "
|
|
+ "MutableComboBoxModel.");
|
|
}
|
|
|
|
/**
|
|
* This method remove element location in the specified index in the
|
|
* JComboBox.
|
|
* <p>A <code>RuntimeException</code> is thrown if the data model is not
|
|
* an instance of {@link MutableComboBoxModel}.</p>
|
|
*
|
|
* @param index index specifying position of the element to remove
|
|
*/
|
|
public void removeItemAt(int index)
|
|
{
|
|
if (dataModel instanceof MutableComboBoxModel)
|
|
((MutableComboBoxModel) dataModel).removeElementAt(index);
|
|
else
|
|
throw new RuntimeException("Unable to remove the item because the data "
|
|
+ "model it is not an instance of "
|
|
+ "MutableComboBoxModel.");
|
|
}
|
|
|
|
/**
|
|
* This method removes all elements from this JComboBox.
|
|
* <p>
|
|
* A <code>RuntimeException</code> is thrown if the data model is not an
|
|
* instance of {@link MutableComboBoxModel}.
|
|
* </p>
|
|
*/
|
|
public void removeAllItems()
|
|
{
|
|
if (dataModel instanceof DefaultComboBoxModel)
|
|
// Uses special method if we have a DefaultComboBoxModel.
|
|
((DefaultComboBoxModel) dataModel).removeAllElements();
|
|
else if (dataModel instanceof MutableComboBoxModel)
|
|
{
|
|
// Iterates over all items and removes each.
|
|
MutableComboBoxModel mcbm = (MutableComboBoxModel) dataModel;
|
|
|
|
// We intentionally remove the items backwards to support models which
|
|
// shift their content to the beginning (e.g. linked lists)
|
|
for (int i = mcbm.getSize() - 1; i >= 0; i--)
|
|
mcbm.removeElementAt(i);
|
|
}
|
|
else
|
|
throw new RuntimeException("Unable to remove the items because the data "
|
|
+ "model it is not an instance of "
|
|
+ "MutableComboBoxModel.");
|
|
}
|
|
|
|
/**
|
|
* This method displays popup with list of combo box's items on the screen
|
|
*/
|
|
public void showPopup()
|
|
{
|
|
setPopupVisible(true);
|
|
}
|
|
|
|
/**
|
|
* This method hides popup containing list of combo box's items
|
|
*/
|
|
public void hidePopup()
|
|
{
|
|
setPopupVisible(false);
|
|
}
|
|
|
|
/**
|
|
* This method either displayes or hides the popup containing list of combo
|
|
* box's items.
|
|
*
|
|
* @param visible show popup if 'visible' is true and hide it otherwise
|
|
*/
|
|
public void setPopupVisible(boolean visible)
|
|
{
|
|
getUI().setPopupVisible(this, visible);
|
|
}
|
|
|
|
/**
|
|
* Checks if popup is currently visible on the screen.
|
|
*
|
|
* @return boolean true if popup is visible and false otherwise
|
|
*/
|
|
public boolean isPopupVisible()
|
|
{
|
|
return getUI().isPopupVisible(this);
|
|
}
|
|
|
|
/**
|
|
* This method sets actionCommand to the specified string. ActionEvent fired
|
|
* to this JComboBox registered ActionListeners will contain this
|
|
* actionCommand.
|
|
*
|
|
* @param aCommand new action command for the JComboBox's ActionEvent
|
|
*/
|
|
public void setActionCommand(String aCommand)
|
|
{
|
|
actionCommand = aCommand;
|
|
}
|
|
|
|
/**
|
|
* Returns actionCommand associated with the ActionEvent fired by the
|
|
* JComboBox to its registered ActionListeners.
|
|
*
|
|
* @return String actionCommand for the ActionEvent
|
|
*/
|
|
public String getActionCommand()
|
|
{
|
|
return actionCommand;
|
|
}
|
|
|
|
/**
|
|
* setAction
|
|
*
|
|
* @param a action to set
|
|
*/
|
|
public void setAction(Action a)
|
|
{
|
|
Action old = action;
|
|
action = a;
|
|
configurePropertiesFromAction(action);
|
|
if (action != null)
|
|
// FIXME: remove from old action and add to new action
|
|
// PropertyChangeListener to listen to changes in the action
|
|
addActionListener(action);
|
|
}
|
|
|
|
/**
|
|
* This method returns Action that is invoked when selected item is changed
|
|
* in the JComboBox.
|
|
*
|
|
* @return Action
|
|
*/
|
|
public Action getAction()
|
|
{
|
|
return action;
|
|
}
|
|
|
|
/**
|
|
* Configure properties of the JComboBox by reading properties of specified
|
|
* action. This method always sets the comboBox's "enabled" property to the
|
|
* value of the Action's "enabled" property.
|
|
*
|
|
* @param a An Action to configure the combo box from
|
|
*/
|
|
protected void configurePropertiesFromAction(Action a)
|
|
{
|
|
if (a == null)
|
|
{
|
|
setEnabled(true);
|
|
setToolTipText(null);
|
|
}
|
|
else
|
|
{
|
|
setEnabled(a.isEnabled());
|
|
setToolTipText((String) (a.getValue(Action.SHORT_DESCRIPTION)));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Creates PropertyChangeListener to listen for the changes in comboBox's
|
|
* action properties.
|
|
*
|
|
* @param action action to listen to for property changes
|
|
*
|
|
* @return a PropertyChangeListener that listens to changes in
|
|
* action properties.
|
|
*/
|
|
protected PropertyChangeListener createActionPropertyChangeListener(Action action)
|
|
{
|
|
return new PropertyChangeListener()
|
|
{
|
|
public void propertyChange(PropertyChangeEvent e)
|
|
{
|
|
Action act = (Action) (e.getSource());
|
|
configurePropertiesFromAction(act);
|
|
}
|
|
};
|
|
}
|
|
|
|
/**
|
|
* This method fires ItemEvent to this JComboBox's registered ItemListeners.
|
|
* This method is invoked when currently selected item in this combo box
|
|
* has changed.
|
|
*
|
|
* @param e the ItemEvent describing the change in the combo box's
|
|
* selection.
|
|
*/
|
|
protected void fireItemStateChanged(ItemEvent e)
|
|
{
|
|
ItemListener[] ll = getItemListeners();
|
|
|
|
for (int i = 0; i < ll.length; i++)
|
|
ll[i].itemStateChanged(e);
|
|
}
|
|
|
|
/**
|
|
* This method fires ActionEvent to this JComboBox's registered
|
|
* ActionListeners. This method is invoked when user explicitly changes
|
|
* currently selected item.
|
|
*/
|
|
protected void fireActionEvent()
|
|
{
|
|
ActionListener[] ll = getActionListeners();
|
|
|
|
for (int i = 0; i < ll.length; i++)
|
|
ll[i].actionPerformed(new ActionEvent(this,
|
|
ActionEvent.ACTION_PERFORMED,
|
|
actionCommand));
|
|
}
|
|
|
|
/**
|
|
* Fires a popupMenuCanceled() event to all <code>PopupMenuListeners</code>.
|
|
*
|
|
* Note: This method is intended for use by plaf classes only.
|
|
*/
|
|
public void firePopupMenuCanceled()
|
|
{
|
|
PopupMenuListener[] listeners = getPopupMenuListeners();
|
|
PopupMenuEvent e = new PopupMenuEvent(this);
|
|
for (int i = 0; i < listeners.length; i++)
|
|
listeners[i].popupMenuCanceled(e);
|
|
}
|
|
|
|
/**
|
|
* Fires a popupMenuWillBecomeInvisible() event to all
|
|
* <code>PopupMenuListeners</code>.
|
|
*
|
|
* Note: This method is intended for use by plaf classes only.
|
|
*/
|
|
public void firePopupMenuWillBecomeInvisible()
|
|
{
|
|
PopupMenuListener[] listeners = getPopupMenuListeners();
|
|
PopupMenuEvent e = new PopupMenuEvent(this);
|
|
for (int i = 0; i < listeners.length; i++)
|
|
listeners[i].popupMenuWillBecomeInvisible(e);
|
|
}
|
|
|
|
/**
|
|
* Fires a popupMenuWillBecomeVisible() event to all
|
|
* <code>PopupMenuListeners</code>.
|
|
*
|
|
* Note: This method is intended for use by plaf classes only.
|
|
*/
|
|
public void firePopupMenuWillBecomeVisible()
|
|
{
|
|
PopupMenuListener[] listeners = getPopupMenuListeners();
|
|
PopupMenuEvent e = new PopupMenuEvent(this);
|
|
for (int i = 0; i < listeners.length; i++)
|
|
listeners[i].popupMenuWillBecomeVisible(e);
|
|
}
|
|
|
|
/**
|
|
* This method is invoked whenever selected item changes in the combo box's
|
|
* data model. It fires ItemEvent and ActionEvent to all registered
|
|
* ComboBox's ItemListeners and ActionListeners respectively, indicating
|
|
* the change.
|
|
*/
|
|
protected void selectedItemChanged()
|
|
{
|
|
// Fire ItemEvent to indicated that previously selected item is now
|
|
// deselected
|
|
if (selectedItemReminder != null)
|
|
fireItemStateChanged(new ItemEvent(this, ItemEvent.ITEM_STATE_CHANGED,
|
|
selectedItemReminder,
|
|
ItemEvent.DESELECTED));
|
|
|
|
// Fire ItemEvent to indicate that new item is selected
|
|
Object newSelection = getSelectedItem();
|
|
if (newSelection != null)
|
|
fireItemStateChanged(new ItemEvent(this, ItemEvent.ITEM_STATE_CHANGED,
|
|
newSelection, ItemEvent.SELECTED));
|
|
|
|
// Fire Action Event to JComboBox's registered listeners
|
|
fireActionEvent();
|
|
|
|
selectedItemReminder = newSelection;
|
|
}
|
|
|
|
/**
|
|
* Returns Object array of size 1 containing currently selected element in
|
|
* the JComboBox.
|
|
*
|
|
* @return Object[] Object array of size 1 containing currently selected
|
|
* element in the JComboBox.
|
|
*/
|
|
public Object[] getSelectedObjects()
|
|
{
|
|
return new Object[] { getSelectedItem() };
|
|
}
|
|
|
|
/**
|
|
* This method handles actionEvents fired by the ComboBoxEditor. It changes
|
|
* this JComboBox's selection to the new value currently in the editor and
|
|
* hides list of combo box items.
|
|
*
|
|
* @param e the ActionEvent
|
|
*/
|
|
public void actionPerformed(ActionEvent e)
|
|
{
|
|
setSelectedItem(getEditor().getItem());
|
|
setPopupVisible(false);
|
|
}
|
|
|
|
/**
|
|
* This method selects item in this combo box that matches specified
|
|
* specified keyChar and returns true if such item is found. Otherwise
|
|
* false is returned.
|
|
*
|
|
* @param keyChar character indicating which item in the combo box should be
|
|
* selected.
|
|
*
|
|
* @return boolean true if item corresponding to the specified keyChar
|
|
* exists in the combo box. Otherwise false is returned.
|
|
*/
|
|
public boolean selectWithKeyChar(char keyChar)
|
|
{
|
|
if (keySelectionManager == null)
|
|
{
|
|
keySelectionManager = createDefaultKeySelectionManager();
|
|
}
|
|
|
|
int index = keySelectionManager.selectionForKey(keyChar, getModel());
|
|
boolean retVal = false;
|
|
if (index >= 0)
|
|
{
|
|
setSelectedIndex(index);
|
|
retVal = true;
|
|
}
|
|
return retVal;
|
|
}
|
|
|
|
/**
|
|
* The part of implementation of ListDataListener interface. This method is
|
|
* invoked when some items where added to the JComboBox's data model.
|
|
*
|
|
* @param event ListDataEvent describing the change
|
|
*/
|
|
public void intervalAdded(ListDataEvent event)
|
|
{
|
|
// FIXME: Need to implement
|
|
repaint();
|
|
}
|
|
|
|
/**
|
|
* The part of implementation of ListDataListener interface. This method is
|
|
* invoked when some items where removed from the JComboBox's data model.
|
|
*
|
|
* @param event ListDataEvent describing the change.
|
|
*/
|
|
public void intervalRemoved(ListDataEvent event)
|
|
{
|
|
// FIXME: Need to implement
|
|
repaint();
|
|
}
|
|
|
|
/**
|
|
* The part of implementation of ListDataListener interface. This method is
|
|
* invoked when contents of the JComboBox's data model changed.
|
|
*
|
|
* @param event ListDataEvent describing the change
|
|
*/
|
|
public void contentsChanged(ListDataEvent event)
|
|
{
|
|
// if first and last index of the given ListDataEvent are both -1,
|
|
// then it indicates that selected item in the combo box data model
|
|
// have changed.
|
|
if (event.getIndex0() == -1 && event.getIndex1() == -1)
|
|
selectedItemChanged();
|
|
}
|
|
|
|
/**
|
|
* This method disables or enables JComboBox. If the JComboBox is enabled,
|
|
* then user is able to make item choice, otherwise if JComboBox is
|
|
* disabled then user is not able to make a selection.
|
|
*
|
|
* @param enabled if 'enabled' is true then enable JComboBox and disable it
|
|
*/
|
|
public void setEnabled(boolean enabled)
|
|
{
|
|
boolean oldEnabled = super.isEnabled();
|
|
if (enabled != oldEnabled)
|
|
{
|
|
super.setEnabled(enabled);
|
|
firePropertyChange("enabled", oldEnabled, enabled);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This method initializes specified ComboBoxEditor to display given item.
|
|
*
|
|
* @param anEditor ComboBoxEditor to initialize
|
|
* @param anItem Item that should displayed in the specified editor
|
|
*/
|
|
public void configureEditor(ComboBoxEditor anEditor, Object anItem)
|
|
{
|
|
anEditor.setItem(anItem);
|
|
}
|
|
|
|
/**
|
|
* This method is fired whenever a key is pressed with the combo box
|
|
* in focus
|
|
*
|
|
* @param e The KeyEvent indicating which key was pressed.
|
|
*/
|
|
public void processKeyEvent(KeyEvent e)
|
|
{
|
|
if (e.getKeyCode() == KeyEvent.VK_TAB)
|
|
setPopupVisible(false);
|
|
else
|
|
super.processKeyEvent(e);
|
|
}
|
|
|
|
/**
|
|
* setKeySelectionManager
|
|
*
|
|
* @param aManager
|
|
*/
|
|
public void setKeySelectionManager(KeySelectionManager aManager)
|
|
{
|
|
keySelectionManager = aManager;
|
|
}
|
|
|
|
/**
|
|
* getKeySelectionManager
|
|
*
|
|
* @return JComboBox.KeySelectionManager
|
|
*/
|
|
public KeySelectionManager getKeySelectionManager()
|
|
{
|
|
return keySelectionManager;
|
|
}
|
|
|
|
/**
|
|
* This method returns number of elements in this JComboBox
|
|
*
|
|
* @return int number of elements in this JComboBox
|
|
*/
|
|
public int getItemCount()
|
|
{
|
|
return dataModel.getSize();
|
|
}
|
|
|
|
/**
|
|
* Returns elements located in the combo box at the given index.
|
|
*
|
|
* @param index index specifying location of the component to return.
|
|
*
|
|
* @return component in the combo box that is located in the given index.
|
|
*/
|
|
public Object getItemAt(int index)
|
|
{
|
|
return dataModel.getElementAt(index);
|
|
}
|
|
|
|
/**
|
|
* createDefaultKeySelectionManager
|
|
*
|
|
* @return KeySelectionManager
|
|
*/
|
|
protected KeySelectionManager createDefaultKeySelectionManager()
|
|
{
|
|
return new DefaultKeySelectionManager();
|
|
}
|
|
|
|
/**
|
|
* Returns an implementation-dependent string describing the attributes of
|
|
* this <code>JComboBox</code>.
|
|
*
|
|
* @return A string describing the attributes of this <code>JComboBox</code>
|
|
* (never <code>null</code>).
|
|
*/
|
|
protected String paramString()
|
|
{
|
|
String superParamStr = super.paramString();
|
|
CPStringBuilder sb = new CPStringBuilder();
|
|
sb.append(",isEditable=").append(isEditable());
|
|
sb.append(",lightWeightPopupEnabled=").append(isLightWeightPopupEnabled());
|
|
sb.append(",maximumRowCount=").append(getMaximumRowCount());
|
|
|
|
sb.append(",selectedItemReminder=");
|
|
if (selectedItemReminder != null)
|
|
sb.append(selectedItemReminder);
|
|
return superParamStr + sb.toString();
|
|
}
|
|
|
|
/**
|
|
* Returns the object that provides accessibility features for this
|
|
* <code>JComboBox</code> component.
|
|
*
|
|
* @return The accessible context (an instance of
|
|
* {@link AccessibleJComboBox}).
|
|
*/
|
|
public AccessibleContext getAccessibleContext()
|
|
{
|
|
if (accessibleContext == null)
|
|
accessibleContext = new AccessibleJComboBox();
|
|
|
|
return accessibleContext;
|
|
}
|
|
|
|
/**
|
|
* This methods adds specified ActionListener to this JComboBox.
|
|
*
|
|
* @param listener to add
|
|
*/
|
|
public void addActionListener(ActionListener listener)
|
|
{
|
|
listenerList.add(ActionListener.class, listener);
|
|
}
|
|
|
|
/**
|
|
* This method removes specified ActionListener from this JComboBox.
|
|
*
|
|
* @param listener ActionListener
|
|
*/
|
|
public void removeActionListener(ActionListener listener)
|
|
{
|
|
listenerList.remove(ActionListener.class, listener);
|
|
}
|
|
|
|
/**
|
|
* This method returns array of ActionListeners that are registered with
|
|
* this JComboBox.
|
|
*
|
|
* @since 1.4
|
|
*/
|
|
public ActionListener[] getActionListeners()
|
|
{
|
|
return (ActionListener[]) getListeners(ActionListener.class);
|
|
}
|
|
|
|
/**
|
|
* This method registers given ItemListener with this JComboBox
|
|
*
|
|
* @param listener to remove
|
|
*/
|
|
public void addItemListener(ItemListener listener)
|
|
{
|
|
listenerList.add(ItemListener.class, listener);
|
|
}
|
|
|
|
/**
|
|
* This method unregisters given ItemListener from this JComboBox
|
|
*
|
|
* @param listener to remove
|
|
*/
|
|
public void removeItemListener(ItemListener listener)
|
|
{
|
|
listenerList.remove(ItemListener.class, listener);
|
|
}
|
|
|
|
/**
|
|
* This method returns array of ItemListeners that are registered with this
|
|
* JComboBox.
|
|
*
|
|
* @since 1.4
|
|
*/
|
|
public ItemListener[] getItemListeners()
|
|
{
|
|
return (ItemListener[]) getListeners(ItemListener.class);
|
|
}
|
|
|
|
/**
|
|
* Adds PopupMenuListener to combo box to listen to the events fired by the
|
|
* combo box's popup menu containing its list of items
|
|
*
|
|
* @param listener to add
|
|
*/
|
|
public void addPopupMenuListener(PopupMenuListener listener)
|
|
{
|
|
listenerList.add(PopupMenuListener.class, listener);
|
|
}
|
|
|
|
/**
|
|
* Removes PopupMenuListener to combo box to listen to the events fired by
|
|
* the combo box's popup menu containing its list of items
|
|
*
|
|
* @param listener to add
|
|
*/
|
|
public void removePopupMenuListener(PopupMenuListener listener)
|
|
{
|
|
listenerList.remove(PopupMenuListener.class, listener);
|
|
}
|
|
|
|
/**
|
|
* Returns array of PopupMenuListeners that are registered with combo box.
|
|
*/
|
|
public PopupMenuListener[] getPopupMenuListeners()
|
|
{
|
|
return (PopupMenuListener[]) getListeners(PopupMenuListener.class);
|
|
}
|
|
|
|
/**
|
|
* Accessibility support for <code>JComboBox</code>.
|
|
*/
|
|
protected class AccessibleJComboBox extends AccessibleJComponent
|
|
implements AccessibleAction, AccessibleSelection
|
|
{
|
|
private static final long serialVersionUID = 8217828307256675666L;
|
|
|
|
/**
|
|
* @specnote This constructor was protected in 1.4, but made public
|
|
* in 1.5.
|
|
*/
|
|
public AccessibleJComboBox()
|
|
{
|
|
// Nothing to do here.
|
|
}
|
|
|
|
/**
|
|
* Returns the number of accessible children of this object. The
|
|
* implementation of AccessibleJComboBox delegates this call to the UI
|
|
* of the associated JComboBox.
|
|
*
|
|
* @return the number of accessible children of this object
|
|
*
|
|
* @see ComponentUI#getAccessibleChildrenCount(JComponent)
|
|
*/
|
|
public int getAccessibleChildrenCount()
|
|
{
|
|
ComponentUI ui = getUI();
|
|
int count;
|
|
if (ui != null)
|
|
count = ui.getAccessibleChildrenCount(JComboBox.this);
|
|
else
|
|
count = super.getAccessibleChildrenCount();
|
|
return count;
|
|
}
|
|
|
|
/**
|
|
* Returns the number of accessible children of this object. The
|
|
* implementation of AccessibleJComboBox delegates this call to the UI
|
|
* of the associated JComboBox.
|
|
*
|
|
* @param index the index of the accessible child to fetch
|
|
*
|
|
* @return the number of accessible children of this object
|
|
*
|
|
* @see ComponentUI#getAccessibleChild(JComponent, int)
|
|
*/
|
|
public Accessible getAccessibleChild(int index)
|
|
{
|
|
ComponentUI ui = getUI();
|
|
Accessible child = null;
|
|
if (ui != null)
|
|
child = ui.getAccessibleChild(JComboBox.this, index);
|
|
else
|
|
child = super.getAccessibleChild(index);
|
|
return child;
|
|
}
|
|
|
|
/**
|
|
* Returns the AccessibleSelection object associated with this object.
|
|
* AccessibleJComboBoxes handle their selection themselves, so this
|
|
* always returns <code>this</code>.
|
|
*
|
|
* @return the AccessibleSelection object associated with this object
|
|
*/
|
|
public AccessibleSelection getAccessibleSelection()
|
|
{
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Returns the accessible selection from this AccssibleJComboBox.
|
|
*
|
|
* @param index the index of the selected child to fetch
|
|
*
|
|
* @return the accessible selection from this AccssibleJComboBox
|
|
*/
|
|
public Accessible getAccessibleSelection(int index)
|
|
{
|
|
// Get hold of the actual popup.
|
|
Accessible popup = getUI().getAccessibleChild(JComboBox.this, 0);
|
|
Accessible selected = null;
|
|
if (popup != null && popup instanceof ComboPopup)
|
|
{
|
|
ComboPopup cPopup = (ComboPopup) popup;
|
|
// Query the list for the currently selected child.
|
|
JList l = cPopup.getList();
|
|
AccessibleContext listCtx = l.getAccessibleContext();
|
|
if (listCtx != null)
|
|
{
|
|
AccessibleSelection s = listCtx.getAccessibleSelection();
|
|
if (s != null)
|
|
{
|
|
selected = s.getAccessibleSelection(index);
|
|
}
|
|
}
|
|
}
|
|
return selected;
|
|
}
|
|
|
|
/**
|
|
* Returns <code>true</code> if the accessible child with the specified
|
|
* <code>index</code> is selected, <code>false</code> otherwise.
|
|
*
|
|
* @param index the index of the accessible child
|
|
*
|
|
* @return <code>true</code> if the accessible child with the specified
|
|
* <code>index</code> is selected, <code>false</code> otherwise
|
|
*/
|
|
public boolean isAccessibleChildSelected(int index)
|
|
{
|
|
return getSelectedIndex() == index;
|
|
}
|
|
|
|
/**
|
|
* Returns the accessible role for the <code>JComboBox</code> component.
|
|
*
|
|
* @return {@link AccessibleRole#COMBO_BOX}.
|
|
*/
|
|
public AccessibleRole getAccessibleRole()
|
|
{
|
|
return AccessibleRole.COMBO_BOX;
|
|
}
|
|
|
|
/**
|
|
* Returns the accessible action associated to this accessible object.
|
|
* AccessibleJComboBox implements its own AccessibleAction, so this
|
|
* method returns <code>this</code>.
|
|
*
|
|
* @return the accessible action associated to this accessible object
|
|
*/
|
|
public AccessibleAction getAccessibleAction()
|
|
{
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Returns the description of the specified action. AccessibleJComboBox
|
|
* implements 1 action (toggle the popup menu) and thus returns
|
|
* <code>UIManager.getString("ComboBox.togglePopupText")</code>
|
|
*
|
|
* @param actionIndex the index of the action for which to return the
|
|
* description
|
|
*
|
|
* @return the description of the specified action
|
|
*/
|
|
public String getAccessibleActionDescription(int actionIndex)
|
|
{
|
|
return UIManager.getString("ComboBox.togglePopupText");
|
|
}
|
|
|
|
/**
|
|
* Returns the number of accessible actions that can be performed by
|
|
* this object. AccessibleJComboBox implement s one accessible action
|
|
* (toggle the popup menu), so this method always returns <code>1</code>.
|
|
*
|
|
* @return the number of accessible actions that can be performed by
|
|
* this object
|
|
*/
|
|
public int getAccessibleActionCount()
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* Performs the accessible action with the specified index.
|
|
* AccessibleJComboBox has 1 accessible action
|
|
* (<code>actionIndex == 0</code>), which is to toggle the
|
|
* popup menu. All other action indices have no effect and return
|
|
* <code<>false</code>.
|
|
*
|
|
* @param actionIndex the index of the action to perform
|
|
*
|
|
* @return <code>true</code> if the action has been performed,
|
|
* <code>false</code> otherwise
|
|
*/
|
|
public boolean doAccessibleAction(int actionIndex)
|
|
{
|
|
boolean actionPerformed = false;
|
|
if (actionIndex == 0)
|
|
{
|
|
setPopupVisible(! isPopupVisible());
|
|
actionPerformed = true;
|
|
}
|
|
return actionPerformed;
|
|
}
|
|
|
|
/**
|
|
* Returns the number of selected accessible children of this object. This
|
|
* returns <code>1</code> if the combobox has a selected entry,
|
|
* <code>0</code> otherwise.
|
|
*
|
|
* @return the number of selected accessible children of this object
|
|
*/
|
|
public int getAccessibleSelectionCount()
|
|
{
|
|
Object sel = getSelectedItem();
|
|
int count = 0;
|
|
if (sel != null)
|
|
count = 1;
|
|
return count;
|
|
}
|
|
|
|
/**
|
|
* Sets the current selection to the specified <code>index</code>.
|
|
*
|
|
* @param index the index to set as selection
|
|
*/
|
|
public void addAccessibleSelection(int index)
|
|
{
|
|
setSelectedIndex(index);
|
|
}
|
|
|
|
/**
|
|
* Removes the specified index from the current selection.
|
|
*
|
|
* @param index the index to remove from the selection
|
|
*/
|
|
public void removeAccessibleSelection(int index)
|
|
{
|
|
if (getSelectedIndex() == index)
|
|
clearAccessibleSelection();
|
|
}
|
|
|
|
/**
|
|
* Clears the current selection.
|
|
*/
|
|
public void clearAccessibleSelection()
|
|
{
|
|
setSelectedIndex(-1);
|
|
}
|
|
|
|
/**
|
|
* Multiple selection is not supported by AccessibleJComboBox, so this
|
|
* does nothing.
|
|
*/
|
|
public void selectAllAccessibleSelection()
|
|
{
|
|
// Nothing to do here.
|
|
}
|
|
}
|
|
|
|
private class DefaultKeySelectionManager
|
|
implements KeySelectionManager
|
|
{
|
|
|
|
public int selectionForKey(char aKey, ComboBoxModel aModel)
|
|
{
|
|
int selectedIndex = getSelectedIndex();
|
|
|
|
// Start at currently selected item and iterate to end of list
|
|
for (int i = selectedIndex + 1; i < aModel.getSize(); i++)
|
|
{
|
|
String nextItem = aModel.getElementAt(i).toString();
|
|
|
|
if (nextItem.charAt(0) == aKey)
|
|
return i;
|
|
}
|
|
|
|
// Wrap to start of list if no match yet
|
|
for (int i = 0; i <= selectedIndex; i++)
|
|
{
|
|
String nextItem = aModel.getElementAt(i).toString();
|
|
|
|
if (nextItem.charAt(0) == aKey)
|
|
return i;
|
|
}
|
|
|
|
return - 1;
|
|
}
|
|
}
|
|
}
|