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| package edu.rice.cs.util.swing; |
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| |
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| import javax.swing.*; |
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| import java.awt.event.*; |
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| import java.beans.*; |
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| import java.util.HashMap; |
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| import java.util.LinkedList; |
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| |
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| public class DelegatingAction implements Action { |
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| |
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| |
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| private static final String[] KEYS_TO_DELEGATE = { |
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| |
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| NAME, |
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| }; |
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| |
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| private HashMap<String, Object> _localProperties = new HashMap<String, Object>(); |
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| |
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| private volatile Action _delegatee; |
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| private final LinkedList<PropertyChangeListener> _listenerList = |
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| new LinkedList<PropertyChangeListener>(); |
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1981
| public Object getValue(String key) {
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1981
| _checkState();
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320
| if (_isDelegatedKey(key)) return _delegatee.getValue(key);
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1661
| else return _localProperties.get(key);
|
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| } |
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| |
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2285
| private boolean _isDelegatedKey(String key) {
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2285
| for (int i = 0; i < KEYS_TO_DELEGATE.length; i++) {
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| if (KEYS_TO_DELEGATE[i].equals(key)) return true;
|
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| } |
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1889
| return false;
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| } |
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| |
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| public void putValue(String key, Object value) {
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| _checkState();
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| if (_isDelegatedKey(key)) {
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| _delegatee.putValue(key, value);
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| } |
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| else { |
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228
| Object old = _localProperties.get(key);
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| _localProperties.put(key, value);
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| |
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| PropertyChangeEvent event = new PropertyChangeEvent(this, key, old, value);
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| for (PropertyChangeListener listener : _listenerList) {
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| listener.propertyChange(event);
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| } |
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| } |
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| } |
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| |
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0
| public void setEnabled(boolean b) {
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0
| _checkState();
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0
| _delegatee.setEnabled(b);
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| } |
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| |
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| public boolean isEnabled() {
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| _checkState();
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| return _delegatee.isEnabled();
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| } |
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| |
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228
| public void addPropertyChangeListener(PropertyChangeListener listener) {
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| _checkState();
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| _delegatee.addPropertyChangeListener(listener);
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| _listenerList.add(listener);
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| } |
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| |
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0
| public void removePropertyChangeListener(PropertyChangeListener listener) {
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0
| _checkState();
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0
| _delegatee.removePropertyChangeListener(listener);
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0
| _listenerList.remove(listener);
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| } |
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| |
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1
| public void actionPerformed(ActionEvent ae) {
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1
| _checkState();
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1
| _delegatee.actionPerformed(ae);
|
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| } |
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| |
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1
| public Action getDelegatee() { return _delegatee; }
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| |
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| public void setDelegatee(final Action newDelegatee) {
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| if (newDelegatee == null) {
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0
| throw new IllegalArgumentException("setDelegatee(null) is not allowed!");
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| } |
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| boolean isEnabled = newDelegatee.isEnabled();
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| |
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| PropertyChangeEvent enabledEvent
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| = new PropertyChangeEvent(newDelegatee, "enabled", Boolean.FALSE, isEnabled); |
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| |
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| PropertyChangeEvent[] events = null;
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| |
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| if (_delegatee != null) {
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| events = new PropertyChangeEvent[KEYS_TO_DELEGATE.length];
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| |
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| for (int i = 0; i < KEYS_TO_DELEGATE.length; i++) {
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| Object oldValue = _delegatee.getValue(KEYS_TO_DELEGATE[i]);
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| Object newValue = newDelegatee.getValue(KEYS_TO_DELEGATE[i]);
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| |
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| events[i] = new PropertyChangeEvent(newDelegatee,
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| KEYS_TO_DELEGATE[i], |
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| oldValue, |
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| newValue); |
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| } |
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| } |
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| |
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| |
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512
| for (PropertyChangeListener listener : _listenerList) {
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396
| if (_delegatee != null) {
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| _delegatee.removePropertyChangeListener(listener);
|
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| } |
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| |
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| newDelegatee.addPropertyChangeListener(listener);
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| if (events != null) {
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| for (int i = 0; i < events.length; i++) {
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| listener.propertyChange(events[i]);
|
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| } |
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| } |
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| |
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| listener.propertyChange(enabledEvent);
|
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| } |
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| |
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512
| _delegatee = newDelegatee;
|
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| } |
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| |
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2739
| private void _checkState() {
|
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2739
| if (_delegatee == null) {
|
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0
| throw new IllegalStateException("delegatee is null!");
|
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| } |
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| } |
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| } |
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| |