org.jdesktop.swingx.JXComboBox Maven / Gradle / Ivy
/*
* $Id: JXComboBox.java 3749 2010-08-08 03:40:37Z kschaefe $
*
* Copyright 2010 Sun Microsystems, Inc., 4150 Network Circle,
* Santa Clara, California 95054, U.S.A. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.jdesktop.swingx;
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Rectangle;
import java.awt.event.KeyEvent;
import java.util.ArrayList;
import java.util.List;
import java.util.Vector;
import javax.accessibility.Accessible;
import javax.swing.ComboBoxModel;
import javax.swing.DefaultComboBoxModel;
import javax.swing.JComboBox;
import javax.swing.JList;
import javax.swing.JTable;
import javax.swing.KeyStroke;
import javax.swing.ListCellRenderer;
import javax.swing.SwingUtilities;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import javax.swing.plaf.basic.ComboPopup;
import javax.swing.tree.TreeCellRenderer;
import org.jdesktop.swingx.decorator.ComponentAdapter;
import org.jdesktop.swingx.decorator.CompoundHighlighter;
import org.jdesktop.swingx.decorator.Highlighter;
import org.jdesktop.swingx.plaf.UIDependent;
import org.jdesktop.swingx.renderer.DefaultListRenderer;
import org.jdesktop.swingx.renderer.JRendererPanel;
import org.jdesktop.swingx.renderer.StringValue;
import org.jdesktop.swingx.rollover.RolloverRenderer;
import org.jdesktop.swingx.util.Contract;
/**
* An enhanced {@code JComboBox} that provides the following additional functionality:
*
* Auto-starts edits correctly for AutoCompletion when inside a {@code JTable}. A normal {@code
* JComboBox} fails to recognize the first key stroke when it has been
* {@link org.jdesktop.swingx.autocomplete.AutoCompleteDecorator#decorate(JComboBox) decorated}.
*
* Adds highlighting support.
*
* @author Karl Schaefer
* @author Jeanette Winzenburg
*/
@SuppressWarnings("serial")
public class JXComboBox extends JComboBox {
/**
* A decorator for the original ListCellRenderer. Needed to hook highlighters
* after messaging the delegate.
*/
public class DelegatingRenderer implements ListCellRenderer, RolloverRenderer, UIDependent {
/** the delegate. */
private ListCellRenderer delegateRenderer;
private JRendererPanel wrapper;
/**
* Instantiates a DelegatingRenderer with combo box's default renderer as delegate.
*/
public DelegatingRenderer() {
this(null);
}
/**
* Instantiates a DelegatingRenderer with the given delegate. If the
* delegate is {@code null}, the default is created via the combo box's factory method.
*
* @param delegate the delegate to use, if {@code null} the combo box's default is
* created and used.
*/
public DelegatingRenderer(ListCellRenderer delegate) {
wrapper = new JRendererPanel(new BorderLayout());
setDelegateRenderer(delegate);
}
/**
* Sets the delegate. If the delegate is {@code null}, the default is created via the combo
* box's factory method.
*
* @param delegate
* the delegate to use, if null the list's default is created and used.
*/
public void setDelegateRenderer(ListCellRenderer delegate) {
if (delegate == null) {
delegate = createDefaultCellRenderer();
}
delegateRenderer = delegate;
}
/**
* Returns the delegate.
*
* @return the delegate renderer used by this renderer, guaranteed to
* not-null.
*/
public ListCellRenderer getDelegateRenderer() {
return delegateRenderer;
}
/**
* {@inheritDoc}
*/
public void updateUI() {
wrapper.updateUI();
if (delegateRenderer instanceof UIDependent) {
((UIDependent) delegateRenderer).updateUI();
} else if (delegateRenderer instanceof Component) {
SwingUtilities.updateComponentTreeUI((Component) delegateRenderer);
} else if (delegateRenderer != null) {
try {
Component comp = delegateRenderer.getListCellRendererComponent(
getPopupListFor(JXComboBox.this), null, -1, false, false);
SwingUtilities.updateComponentTreeUI(comp);
} catch (Exception e) {
// nothing to do - renderer barked on off-range row
}
}
}
// --------- implement ListCellRenderer
/**
* {@inheritDoc}
*
* Overridden to apply the highlighters, if any, after calling the delegate.
* The decorators are not applied if the row is invalid.
*/
public Component getListCellRendererComponent(JList list, Object value, int index,
boolean isSelected, boolean cellHasFocus) {
Component comp = null;
if (index == -1) {
comp = delegateRenderer.getListCellRendererComponent(list, value,
getSelectedIndex(), isSelected, cellHasFocus);
if (isUseHighlightersForCurrentValue() && compoundHighlighter != null && getSelectedIndex() != -1) {
comp = compoundHighlighter.highlight(comp, getComponentAdapter(getSelectedIndex()));
// this is done to "trick" BasicComboBoxUI.paintCurrentValue which resets all of
// the painted information after asking the list to render the value. the panel
// wrappers receives all of the post-rendering configuration, which is dutifully
// ignored by the real rendering component
wrapper.add(comp);
comp = wrapper;
}
} else {
comp = delegateRenderer.getListCellRendererComponent(list, value, index,
isSelected, cellHasFocus);
if ((compoundHighlighter != null) && (index >= 0) && (index < getItemCount())) {
comp = compoundHighlighter.highlight(comp, getComponentAdapter(index));
}
}
return comp;
}
// implement RolloverRenderer
/**
* {@inheritDoc}
*
*/
public boolean isEnabled() {
return (delegateRenderer instanceof RolloverRenderer) &&
((RolloverRenderer) delegateRenderer).isEnabled();
}
/**
* {@inheritDoc}
*/
public void doClick() {
if (isEnabled()) {
((RolloverRenderer) delegateRenderer).doClick();
}
}
}
protected static class ComboBoxAdapter extends ComponentAdapter {
private final JComboBox comboBox;
/**
* Constructs a ListAdapter for the specified target
* JXList.
*
* @param component the target list.
*/
public ComboBoxAdapter(JComboBox component) {
super(component);
comboBox = component;
}
/**
* Typesafe accessor for the target component.
*
* @return the target component as a {@link org.jdesktop.swingx.JXComboBox}
*/
public JComboBox getComboBox() {
return comboBox;
}
/**
* {@inheritDoc}
*/
@Override
public boolean hasFocus() {
if (comboBox.isPopupVisible()) {
JList list = getPopupListFor(comboBox);
return list != null && list.isFocusOwner() && (row == list.getLeadSelectionIndex());
}
return comboBox.isFocusOwner();
}
/**
* {@inheritDoc}
*/
@Override
public int getRowCount() {
return comboBox.getModel().getSize();
}
/**
* {@inheritDoc}
*/
@Override
public Object getValueAt(int row, int column) {
return comboBox.getModel().getElementAt(row);
}
/**
* {@inheritDoc}
* This is implemented to query the table's StringValueRegistry for an appropriate
* StringValue and use that for getting the string representation.
*/
@Override
public String getStringAt(int row, int column) {
ListCellRenderer renderer = comboBox.getRenderer();
if (renderer instanceof DelegatingRenderer) {
renderer = ((DelegatingRenderer) renderer).getDelegateRenderer();
}
if (renderer instanceof StringValue) {
return ((StringValue) renderer).getString(getValueAt(row, column));
}
return super.getStringAt(row, column);
}
/**
* {@inheritDoc}
*/
@Override
public Rectangle getCellBounds() {
JList list = getPopupListFor(comboBox);
if (list == null) {
assert false;
return new Rectangle(comboBox.getSize());
}
return list.getCellBounds(row, row);
}
/**
* {@inheritDoc}
*/
@Override
public boolean isCellEditable(int row, int column) {
return row == -1 && comboBox.isEditable();
}
/**
* {@inheritDoc}
*/
@Override
public boolean isEditable() {
return isCellEditable(row, column);
}
/**
* {@inheritDoc}
*/
@Override
public boolean isSelected() {
if (comboBox.isPopupVisible()) {
JList list = getPopupListFor(comboBox);
return list != null && row == list.getLeadSelectionIndex();
}
return comboBox.isFocusOwner();
}
}
private ComboBoxAdapter dataAdapter;
private DelegatingRenderer delegatingRenderer;
private boolean useHighlightersForCurrentValue = true;
private CompoundHighlighter compoundHighlighter;
private ChangeListener highlighterChangeListener;
private List pendingEvents = new ArrayList();
private boolean isDispatching;
/**
* Creates a JXComboBox with a default data model. The default data model is an
* empty list of objects. Use addItem to add items. By default the first item in
* the data model becomes selected.
*
* @see DefaultComboBoxModel
*/
public JXComboBox() {
super();
}
/**
* Creates a JXComboBox that takes its items from an existing
* ComboBoxModel. Since the ComboBoxModel is provided, a combo box
* created using this constructor does not create a default combo box model and may impact how
* the insert, remove and add methods behave.
*
* @param model
* the ComboBoxModel that provides the displayed list of items
* @see DefaultComboBoxModel
*/
public JXComboBox(ComboBoxModel model) {
super(model);
}
/**
* Creates a JXComboBox that contains the elements in the specified array. By
* default the first item in the array (and therefore the data model) becomes selected.
*
* @param items
* an array of objects to insert into the combo box
* @see DefaultComboBoxModel
*/
public JXComboBox(Object[] items) {
super(items);
}
/**
* Creates a JXComboBox that contains the elements in the specified Vector. By
* default the first item in the vector (and therefore the data model) becomes selected.
*
* @param items
* an array of vectors to insert into the combo box
* @see DefaultComboBoxModel
*/
public JXComboBox(Vector items) {
super(items);
}
protected static JList getPopupListFor(JComboBox comboBox) {
int count = comboBox.getUI().getAccessibleChildrenCount(comboBox);
for (int i = 0; i < count; i++) {
Accessible a = comboBox.getUI().getAccessibleChild(comboBox, i);
if (a instanceof ComboPopup) {
return ((ComboPopup) a).getList();
}
}
return null;
}
/**
* {@inheritDoc}
*/
@Override
protected boolean processKeyBinding(KeyStroke ks, final KeyEvent e, int condition,
boolean pressed) {
boolean retValue = super.processKeyBinding(ks, e, condition, pressed);
if (!retValue && editor != null) {
if (isStartingCellEdit(e)) {
pendingEvents.add(e);
} else if (pendingEvents.size() == 2) {
pendingEvents.add(e);
isDispatching = true;
SwingUtilities.invokeLater(new Runnable() {
public void run() {
try {
for (KeyEvent event : pendingEvents) {
editor.getEditorComponent().dispatchEvent(event);
}
pendingEvents.clear();
} finally {
isDispatching = false;
}
}
});
}
}
return retValue;
}
private boolean isStartingCellEdit(KeyEvent e) {
if (isDispatching) {
return false;
}
JTable table = (JTable) SwingUtilities.getAncestorOfClass(JTable.class, this);
boolean isOwned = table != null
&& !Boolean.FALSE.equals(table.getClientProperty("JTable.autoStartsEdit"));
return isOwned && e.getComponent() == table;
}
/**
* @return the unconfigured ComponentAdapter.
*/
protected ComponentAdapter getComponentAdapter() {
if (dataAdapter == null) {
dataAdapter = new ComboBoxAdapter(this);
}
return dataAdapter;
}
/**
* Convenience to access a configured ComponentAdapter.
* Note: the column index of the configured adapter is always 0.
*
* @param index the row index in view coordinates, must be valid.
* @return the configured ComponentAdapter.
*/
protected ComponentAdapter getComponentAdapter(int index) {
ComponentAdapter adapter = getComponentAdapter();
adapter.column = 0;
adapter.row = index;
return adapter;
}
private DelegatingRenderer getDelegatingRenderer() {
if (delegatingRenderer == null) {
// only called once... to get hold of the default?
delegatingRenderer = new DelegatingRenderer();
}
return delegatingRenderer;
}
/**
* Creates and returns the default cell renderer to use. Subclasses
* may override to use a different type. Here: returns a DefaultListRenderer.
*
* @return the default cell renderer to use with this list.
*/
protected ListCellRenderer createDefaultCellRenderer() {
return new DefaultListRenderer();
}
/**
* {@inheritDoc}
*
* Overridden to return the delegating renderer which is wrapped around the
* original to support highlighting. The returned renderer is of type
* DelegatingRenderer and guaranteed to not-null
*
* @see #setRenderer(ListCellRenderer)
* @see DelegatingRenderer
*/
@Override
public ListCellRenderer getRenderer() {
// PENDING JW: something wrong here - why exactly can't we return super?
// not even if we force the initial setting in init?
// return super.getCellRenderer();
return getDelegatingRenderer();
}
/**
* Returns the renderer installed by client code or the default if none has
* been set.
*
* @return the wrapped renderer.
* @see #setCellRenderer(TreeCellRenderer)
*/
public ListCellRenderer getWrappedRenderer() {
return getDelegatingRenderer().getDelegateRenderer();
}
/**
* {@inheritDoc}
*
* Overridden to wrap the given renderer in a DelegatingRenderer to support
* highlighting.
*
* Note: the wrapping implies that the renderer returned from the getCellRenderer
* is not the renderer as given here, but the wrapper. To access the original,
* use getWrappedCellRenderer.
*
* @see #getWrappedCellRenderer()
* @see #getCellRenderer()
*/
@Override
public void setRenderer(ListCellRenderer renderer) {
// PENDING: do something against recursive setting
// == multiple delegation...
ListCellRenderer oldValue = super.getRenderer();
getDelegatingRenderer().setDelegateRenderer(renderer);
super.setRenderer(delegatingRenderer);
if (oldValue == delegatingRenderer) {
firePropertyChange("renderer", null, delegatingRenderer);
}
}
public boolean isUseHighlightersForCurrentValue() {
return useHighlightersForCurrentValue;
}
public void setUseHighlightersForCurrentValue(boolean useHighlightersForCurrentValue) {
boolean oldValue = isUseHighlightersForCurrentValue();
this.useHighlightersForCurrentValue = useHighlightersForCurrentValue;
firePropertyChange("useHighlightersForCurrentValue", oldValue,
isUseHighlightersForCurrentValue());
}
/**
* Returns the CompoundHighlighter assigned to the table, null if none. PENDING: open up for
* subclasses again?.
*
* @return the CompoundHighlighter assigned to the table.
* @see #setCompoundHighlighter(CompoundHighlighter)
*/
private CompoundHighlighter getCompoundHighlighter() {
return compoundHighlighter;
}
/**
* Assigns a CompoundHighlighter to the table, maybe null to remove all Highlighters.
*
*
* The default value is null.
*
*
* PENDING: open up for subclasses again?.
*
* @param pipeline
* the CompoundHighlighter to use for renderer decoration.
* @see #getCompoundHighlighter()
* @see #addHighlighter(Highlighter)
* @see #removeHighlighter(Highlighter)
*
*/
private void setCompoundHighlighter(CompoundHighlighter pipeline) {
CompoundHighlighter old = getCompoundHighlighter();
if (old != null) {
old.removeChangeListener(getHighlighterChangeListener());
}
compoundHighlighter = pipeline;
if (compoundHighlighter != null) {
compoundHighlighter.addChangeListener(getHighlighterChangeListener());
}
// PENDING: wrong event - the property is either "compoundHighlighter"
// or "highlighters" with the old/new array as value
firePropertyChange("highlighters", old, getCompoundHighlighter());
}
/**
* Sets the Highlighters to the column, replacing any old settings. None of the
* given Highlighters must be null.
*
*
* @param highlighters
* zero or more not null highlighters to use for renderer decoration.
*
* @see #getHighlighters()
* @see #addHighlighter(Highlighter)
* @see #removeHighlighter(Highlighter)
*
*/
public void setHighlighters(Highlighter... highlighters) {
Contract.asNotNull(highlighters, "highlighters cannot be null or contain null");
CompoundHighlighter pipeline = null;
if (highlighters.length > 0) {
pipeline = new CompoundHighlighter(highlighters);
}
setCompoundHighlighter(pipeline);
}
/**
* Returns the Highlighters used by this column. Maybe empty, but guarantees to be
* never null.
*
* @return the Highlighters used by this column, guaranteed to never null.
* @see #setHighlighters(Highlighter[])
*/
public Highlighter[] getHighlighters() {
return getCompoundHighlighter() != null ? getCompoundHighlighter().getHighlighters()
: CompoundHighlighter.EMPTY_HIGHLIGHTERS;
}
/**
* Adds a Highlighter. Appends to the end of the list of used Highlighters.
*
*
* @param highlighter
* the Highlighter to add.
* @throws NullPointerException
* if Highlighter is null.
*
* @see #removeHighlighter(Highlighter)
* @see #setHighlighters(Highlighter[])
*/
public void addHighlighter(Highlighter highlighter) {
CompoundHighlighter pipeline = getCompoundHighlighter();
if (pipeline == null) {
setCompoundHighlighter(new CompoundHighlighter(highlighter));
} else {
pipeline.addHighlighter(highlighter);
}
}
/**
* Removes the given Highlighter.
*
*
* Does nothing if the Highlighter is not contained.
*
* @param highlighter
* the Highlighter to remove.
* @see #addHighlighter(Highlighter)
* @see #setHighlighters(Highlighter...)
*/
public void removeHighlighter(Highlighter highlighter) {
if ((getCompoundHighlighter() == null)) {
return;
}
getCompoundHighlighter().removeHighlighter(highlighter);
}
/**
* Returns the ChangeListener to use with highlighters. Lazily creates the
* listener.
*
* @return the ChangeListener for observing changes of highlighters, guaranteed to be
* not-null
*/
protected ChangeListener getHighlighterChangeListener() {
if (highlighterChangeListener == null) {
highlighterChangeListener = createHighlighterChangeListener();
}
return highlighterChangeListener;
}
/**
* Creates and returns the ChangeListener observing Highlighters.
*
* A property change event is create for a state change.
*
* @return the ChangeListener defining the reaction to changes of highlighters.
*/
protected ChangeListener createHighlighterChangeListener() {
return new ChangeListener() {
public void stateChanged(ChangeEvent e) {
// need to fire change so JXComboBox can update
firePropertyChange("highlighters", null, getHighlighters());
repaint();
}
};
}
/**
* {@inheritDoc}
*
* Overridden to update renderer and highlighters.
*/
@Override
public void updateUI() {
super.updateUI();
ListCellRenderer renderer = getRenderer();
if (renderer instanceof UIDependent) {
((UIDependent) renderer).updateUI();
} else if (renderer instanceof Component) {
SwingUtilities.updateComponentTreeUI((Component) renderer);
}
if (compoundHighlighter != null) {
compoundHighlighter.updateUI();
}
}
}