java.beans.PropertyChangeEvent#getNewValue ( )源码实例Demo

/**
 * Needed to track which KeyboardFocusManager is current. We want to avoid memory
 * leaks, so when KFM stops being current, we remove ourselves as listeners.
 */
public void propertyChange(PropertyChangeEvent evt) {
    // We don't handle any other properties. Skip it.
    if (!evt.getPropertyName().equals("managingFocus")) {
        return;
    }

    // We only do it if it stops being current. Technically, we should
    // never get an event about KFM starting being current.
    if (evt.getNewValue() == Boolean.TRUE) {
        return;
    }

    // should be the same as appletKFM
    removeTraversingOutListeners((KeyboardFocusManager)evt.getSource());

    appletKFM = KeyboardFocusManager.getCurrentKeyboardFocusManager();
    if (isVisible()) {
        addTraversingOutListeners(appletKFM);
    }
}
 

public void assertEvent(String propertyName, Object old, Object now) {
    for (PropertyChangeEvent e : events) {
        if (propertyName.equals(e.getPropertyName())) {
            if (old != null && ! old.equals(e.getOldValue()) ||
                old == null && e.getOldValue() != null) {
                continue;
            }
            if (now != null && ! now.equals(e.getNewValue()) ||
                now == null && e.getNewValue() != null) {
                continue;
            }
            return; //matched
        }
    }
    assertTrue("Expect property change event on "+propertyName+" with "+old+" and "+now, false);
}
 

@Override
public void propertyChange(PropertyChangeEvent evt) {
    String propertyName = evt.getPropertyName();
    if (logger.isLoggable(Level.FINE)) {
        logger.fine("EditorRegistryListener.propertyChange("+propertyName+": "+evt.getOldValue()+" => "+evt.getNewValue()+")");
    }
    if (propertyName.equals(EditorRegistry.FOCUS_LOST_PROPERTY)) {
        Object newFocused = evt.getNewValue();
        if (newFocused instanceof JRootPane) {
            JRootPane root = (JRootPane) newFocused;
            if (root.isAncestorOf((Component) evt.getOldValue())) {
                logger.fine("Focused root.");
                root.addFocusListener(this);
                return;
            }
        }
    }
    if (propertyName.equals(EditorRegistry.FOCUS_GAINED_PROPERTY) ||
        propertyName.equals(EditorRegistry.FOCUS_LOST_PROPERTY) ||
        propertyName.equals(EditorRegistry.FOCUSED_DOCUMENT_PROPERTY)) {
        
        update(true);
    }
}
 

/**
 * Updates row header.
 *
 * @param e the property change event
 */
protected void updateRowHeader(PropertyChangeEvent e)
{
    JViewport newRowHead = (JViewport)(e.getNewValue());
    if (newRowHead != null) {
        JViewport viewport = scrollpane.getViewport();
        Point p = newRowHead.getViewPosition();
        p.y = (viewport != null) ? viewport.getViewPosition().y : 0;
        newRowHead.setViewPosition(p);
    }
}
 

@Override
public void propertyChange(PropertyChangeEvent evt) {
    int state = ((Integer) evt.getNewValue());
    if (JPDADebugger.STATE_DISCONNECTED == state ||
        JPDADebugger.STATE_RUNNING == state) {
        SwingUtilities.invokeLater(this);
    }
}
 

@Override
public void propertyChange(PropertyChangeEvent evt) {
    if (JPDADebugger.PROP_CURRENT_CALL_STACK_FRAME.equals(evt.getPropertyName())) {
        CallStackFrame frame = (CallStackFrame) evt.getNewValue();
        if (frame != null) {
            CurrentPCInfo currentPCInfo = TruffleAccess.getCurrentPCInfo(frame.getThread());
            isAtTruffleLocation = currentPCInfo != null;
            openIfCan();
        } else {
            isAtTruffleLocation = false;
        }
    }
}
 

/**
 * Update the progress bar.
 * <p/>
 * @param evt the property change event.
 */
@Override
public void propertyChange(PropertyChangeEvent evt) {
	String strPropertyName = evt.getPropertyName();
	if ("progress".equals(strPropertyName) && statusPanel != null) {
		int progress = (Integer) evt.getNewValue();
		statusPanel.getProgressBar().setProgress(progress);
	}
}
 

private boolean affectsView(PropertyChangeEvent event) {
    FileStatusCache.ChangedEvent changedEvent = (FileStatusCache.ChangedEvent) event.getNewValue();
    File file = changedEvent.getFile();
    FileInformation oldInfo = changedEvent.getOldInfo();
    FileInformation newInfo = changedEvent.getNewInfo();
    if (oldInfo == null) {
        if ((newInfo.getStatus() & displayStatuses) == 0) return false;
    } else {
        if ((oldInfo.getStatus() & displayStatuses) + (newInfo.getStatus() & displayStatuses) == 0) return false;
    }
    return isLocal() && containsFile(file);
}
 

protected void doSelectedFilesChanged(final PropertyChangeEvent e) {
    File[] files = (File[]) e.getNewValue();
    JFileChooser fc = getFileChooser();
    if (files != null
        && files.length > 0
        && (files.length > 1 || fc.isDirectorySelectionEnabled() || !files[0].isDirectory())) {
        setFileName(fileNameString(files));
    }
}
 

@Override
public void propertyChange(final PropertyChangeEvent evt) {
    super.propertyChange(evt);
    if (PropertyKey.DOCUMENT.equals(evt.getPropertyName())) {
        Object oldDoc = evt.getOldValue();
        Object newDoc = evt.getNewValue();
        if (oldDoc instanceof Document) {
            ((Document) oldDoc).removeDocumentListener(this);
        }
        if (newDoc instanceof Document) {
            ((Document) newDoc).addDocumentListener(this);
        }
    }
}
 

public void propertyChange(PropertyChangeEvent evt)
{
    String propertyName = evt.getPropertyName();
    if(propertyName.equals("selected"))
    {
        Boolean selected = (Boolean)evt.getNewValue();
        button.setSelected(selected.booleanValue());
    }
}
 

public void propertyChange(PropertyChangeEvent evt) {
    if (ExplorerManager.PROP_SELECTED_NODES.equals(evt.getPropertyName())) {
        Node[] nodes = (Node[]) evt.getNewValue();
        if (nodes.length != 1) {
            selectServer(null);
        } else {
            selectServer(nodes[0]);
        }
    }
}
 

@Override
public void propertyChange(final PropertyChangeEvent evt) {
    String key = evt.getPropertyName();
    Component editorComponent = ui.getEditorComponent();
    JComponent editor = ui.getEditor();
    if (PropertyKey.OPAQUE.equals(key)) {
        boolean val = Boolean.TRUE.equals(evt.getNewValue());
        spinner.getEditor().setOpaque(val);
        if (editorComponent instanceof JComponent) {
            ((JComponent) editorComponent).setOpaque(val);
        }
    } else if (KEY_IS_TABLE_EDITOR.equals(key)) {
        if (Boolean.FALSE.equals(evt.getNewValue())) {
            if (editor instanceof JSpinner.DefaultEditor) {
                // if editor alignment isn't set in LAF, we get 0 (CENTER) here
                int alignment = UIManager.getInt("Spinner.editorAlignment");
                JTextField text = ((JSpinner.DefaultEditor) editor).getTextField();
                text.setHorizontalAlignment(alignment);
            }
        }
        spinner.revalidate();
        spinner.repaint();
    } else if (KEY_EDITOR_ALIGNMENT.equals(key) && SpinnerConstants.isTableCellEditor(spinner)) {
        if (editorComponent instanceof JTextField && evt.getNewValue() instanceof Integer) {
            ((JTextField) editorComponent).setHorizontalAlignment((Integer) evt.getNewValue());
        }
        spinner.revalidate();
    } else if (KEY_VARIANT.equals(key)) {
        spinner.repaint();
    } else if (KEY_IS_TREE_EDITOR.equals(key)) {
        spinner.revalidate();
        spinner.repaint();
    }
}
 

public void propertyChange(PropertyChangeEvent evt) {
    String prop = evt.getPropertyName();

    if (prop == JInternalFrame.IS_SELECTED_PROPERTY) {
        repaint();
        return;
    }

    if (prop == JInternalFrame.IS_ICON_PROPERTY ||
            prop == JInternalFrame.IS_MAXIMUM_PROPERTY) {
        setButtonIcons();
        enableActions();
        return;
    }

    if ("closable" == prop) {
        if (evt.getNewValue() == Boolean.TRUE) {
            add(closeButton);
        } else {
            remove(closeButton);
        }
    } else if ("maximizable" == prop) {
        if (evt.getNewValue() == Boolean.TRUE) {
            add(maxButton);
        } else {
            remove(maxButton);
        }
    } else if ("iconable" == prop) {
        if (evt.getNewValue() == Boolean.TRUE) {
            add(iconButton);
        } else {
            remove(iconButton);
        }
    }
    enableActions();

    revalidate();
    repaint();
}
 

public synchronized void propertyChange(PropertyChangeEvent e) {
    if ("lookAndFeel" == e.getPropertyName()
        && ! (e.getNewValue() instanceof WindowsLookAndFeel) ) {
        dispose();
    }
}
 

@Override
public void propertyChange(PropertyChangeEvent e) {
    String name = e.getPropertyName();
    if ( ptr != 0 ) {
        Object newValue = e.getNewValue();
        Object oldValue = e.getOldValue();
        if (name.compareTo(ACCESSIBLE_CARET_PROPERTY) == 0) {
            selectedTextChanged(ptr);
        } else if (name.compareTo(ACCESSIBLE_TEXT_PROPERTY) == 0 ) {
            valueChanged(ptr);
        } else if (name.compareTo(ACCESSIBLE_SELECTION_PROPERTY) == 0 ) {
            selectionChanged(ptr);
        } else if (name.compareTo(ACCESSIBLE_ACTIVE_DESCENDANT_PROPERTY) == 0 ) {
            if (newValue instanceof AccessibleContext) {
                activeDescendant = (AccessibleContext)newValue;
            }
        } else if (name.compareTo(ACCESSIBLE_STATE_PROPERTY) == 0) {
            AccessibleContext thisAC = accessible.getAccessibleContext();
            AccessibleRole thisRole = thisAC.getAccessibleRole();
            Accessible parentAccessible = thisAC.getAccessibleParent();
            AccessibleRole parentRole = null;
            if (parentAccessible != null) {
                parentRole = parentAccessible.getAccessibleContext().getAccessibleRole();
            }
            // At least for now don't handle combo box menu state changes.
            // This may change when later fixing issues which currently
            // exist for combo boxes, but for now the following is only
            // for JPopupMenus, not for combobox menus.
            if (parentRole != AccessibleRole.COMBO_BOX) {
                if (thisRole == AccessibleRole.POPUP_MENU) {
                    if ( newValue != null &&
                         ((AccessibleState)newValue) == AccessibleState.VISIBLE ) {
                            menuOpened(ptr);
                    } else if ( oldValue != null &&
                                ((AccessibleState)oldValue) == AccessibleState.VISIBLE ) {
                        menuClosed(ptr);
                    }
                } else if (thisRole == AccessibleRole.MENU_ITEM) {
                    if ( newValue != null &&
                         ((AccessibleState)newValue) == AccessibleState.FOCUSED ) {
                        menuItemSelected(ptr);
                    }
                }
            }
        }
    }
}
 

public void testVisibilityNotification() {
if (!IONotifier.isSupported(io))
    return;

PropertyChangeListener pcl = new PropertyChangeListener() {
    @Override
    public void propertyChange(PropertyChangeEvent evt) {
	if (evt.getPropertyName().equals(IOVisibility.PROP_VISIBILITY)) {
	    assertTrue("property change not on EDT", SwingUtilities.isEventDispatchThread());
	    assertTrue("Got event '" + evt.getPropertyName() + "' instead of PROP_VISIBILITY",
		evt.getPropertyName().equals(IOVisibility.PROP_VISIBILITY));
	    visible = (Boolean) evt.getNewValue();
	} else if (evt.getPropertyName().equals(IOResizable.PROP_SIZE)) {
	} else {
	    System.out.printf("Unexpected event '%s'\n", evt.getPropertyName());
	}
    }
};
IONotifier.addPropertyChangeListener(io, pcl);

// setUp() calls select() so the terminal should be initially visible

try {
    // make it invisible
    IOVisibility.setVisible(io, false);
    sleep(1);
    assertTrue("no visibility property change", visible == false);

    // make it visible again
    IOVisibility.setVisible(io, true);
    sleep(1);
    assertTrue("no visibility property change", visible == true);

    // make it invisible again
    IOVisibility.setVisible(io, false);
    sleep(1);
    assertTrue("no visibility property change", visible == false);

    // make it visible again
    IOVisibility.setVisible(io, true);
    sleep(1);
    assertTrue("no visibility property change", visible == true);
} finally {
    IONotifier.removePropertyChangeListener(io, pcl);
}
   }
 

public void propertyChange(final PropertyChangeEvent e) {
    if (viewType == -1) {
        setViewType(VIEWTYPE_LIST);
    }

    String s = e.getPropertyName();
    switch (s) {
        case JFileChooser.SELECTED_FILE_CHANGED_PROPERTY :
            doSelectedFileChanged(e);
            break;
        case JFileChooser.SELECTED_FILES_CHANGED_PROPERTY :
            doSelectedFilesChanged(e);
            break;
        case JFileChooser.DIRECTORY_CHANGED_PROPERTY :
            doDirectoryChanged(e);
            break;
        case JFileChooser.FILE_FILTER_CHANGED_PROPERTY :
            doFilterChanged(e);
            break;
        case JFileChooser.FILE_SELECTION_MODE_CHANGED_PROPERTY :
            doFileSelectionModeChanged(e);
            break;
        case JFileChooser.MULTI_SELECTION_ENABLED_CHANGED_PROPERTY :
            doMultiSelectionChanged(e);
            break;
        case JFileChooser.CANCEL_SELECTION :
            applyEdit();
            break;
        case "busy" :
            setCursor((Boolean) e.getNewValue() ? waitCursor : null);
            break;
        case PropertyKey.COMPONENT_ORIENTATION :
            ComponentOrientation o = (ComponentOrientation) e.getNewValue();
            JFileChooser cc = (JFileChooser) e.getSource();
            if (o != e.getOldValue()) {
                cc.applyComponentOrientation(o);
            }
            if (detailsTable != null) {
                detailsTable.setComponentOrientation(o);
                detailsTable.getParent().getParent().setComponentOrientation(o);
            }
            break;
    }
}
 

/**
 * Installs listeners on the associated ribbon band.
 */
protected void installListeners() {
    // without this empty adapter, the global listener never
    // gets mouse entered events on the ribbon band
    this.mouseListener = new MouseAdapter() {
    };
    this.ribbonBand.addMouseListener(this.mouseListener);

    this.propertyChangeListener = (PropertyChangeEvent evt) -> {
        if ("title".equals(evt.getPropertyName()))
            ribbonBand.repaint();
        if ("expandButtonKeyTip".equals(evt.getPropertyName())) {
            if (expandButton != null) {
                expandButton.setActionKeyTip((String) evt.getNewValue());
            }
        }
        if ("expandButtonRichTooltip".equals(evt.getPropertyName())) {
            if (expandCommand != null) {
                expandCommand.setActionRichTooltip((RichTooltip) evt.getNewValue());
            }
        }
        if ("collapsedStateKeyTip".equals(evt.getPropertyName())) {
            if (collapsedButton != null) {
                collapsedButton.setPopupKeyTip((String) evt.getNewValue());
            }
        }
        if ("expandCommandListener".equals(evt.getPropertyName())) {
            CommandAction oldListener = (CommandAction) evt.getOldValue();
            CommandAction newListener = (CommandAction) evt.getNewValue();

            if ((oldListener != null) && (newListener == null)) {
                // need to remove
                ribbonBand.remove(expandButton);
                expandButton = null;
                ribbonBand.revalidate();
            }
            if ((oldListener == null) && (newListener != null)) {
                // need to add
                expandCommand = createExpandCommand();
                expandButton = createExpandButton();
                ribbonBand.add(expandButton);
                ribbonBand.revalidate();
            }
            if ((oldListener != null) && (newListener != null)) {
                // need to reconfigure
                expandCommand.setAction(newListener);
            }
        }
        if ("componentOrientation".equals(evt.getPropertyName())) {
            if (expandButton != null) {
                syncExpandButtonIcon();
            }
        }
    };
    this.ribbonBand.addPropertyChangeListener(this.propertyChangeListener);
}
 

/**
 * Report a vetoable property update to any registered listeners. 
 * Notifications are sent serially (although in no particular order)
 * to the list of listeners,
 * aborting if one throws PropertyVetoException. Upon this exception,
 * fire a new event reverting this
 * change to all listeners that have already been notified
 * (ignoring any further vetos), 
 * suppress notifications to all other listeners, and
 * then rethrow the PropertyVetoException.
 * <p>
 * No event is fired if old and new are equal and non-null.
 *
 * equal and non-null.
 * @param evt  The PropertyChangeEvent object.
 * @exception PropertyVetoException if the recipient wishes the property
 *              change to be rolled back.
 */
public void fireVetoableChange(PropertyChangeEvent evt) throws PropertyVetoException {
  Object oldValue = evt.getOldValue();
  Object newValue = evt.getNewValue();
  if (oldValue == null || newValue == null || !oldValue.equals(newValue)) 
    multicast(evt);
}