| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to you under the Apache License, |
| * Version 2.0 (the "License"); you may not use this file except in |
| * compliance with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.pivot.wtk; |
| |
| import java.util.Iterator; |
| |
| import org.apache.pivot.collections.Dictionary; |
| import org.apache.pivot.collections.HashMap; |
| import org.apache.pivot.util.ImmutableIterator; |
| import org.apache.pivot.util.ListenerList; |
| |
| /** |
| * Abstract base class for "actions". Actions are common application behaviors |
| * generally triggered by buttons and keyboard shortcuts. |
| */ |
| public abstract class Action { |
| /** |
| * Action dictionary implementation. |
| */ |
| public static final class NamedActionDictionary implements Dictionary<String, Action>, |
| Iterable<String> { |
| private NamedActionDictionary() { |
| } |
| |
| @Override |
| public Action get(String id) { |
| return namedActions.get(id); |
| } |
| |
| @Override |
| public Action put(String id, Action action) { |
| if (action == null) { |
| throw new IllegalArgumentException("action is null."); |
| } |
| |
| boolean update = containsKey(id); |
| Action previousAction = namedActions.put(id, action); |
| |
| if (update) { |
| actionClassListeners.actionUpdated(id, previousAction); |
| } else { |
| actionClassListeners.actionAdded(id); |
| } |
| |
| return previousAction; |
| } |
| |
| @Override |
| public Action remove(String id) { |
| Action action = null; |
| |
| if (containsKey(id)) { |
| action = namedActions.remove(id); |
| actionClassListeners.actionRemoved(id, action); |
| } |
| |
| return action; |
| } |
| |
| @Override |
| public boolean containsKey(String id) { |
| return namedActions.containsKey(id); |
| } |
| |
| @Override |
| public Iterator<String> iterator() { |
| return new ImmutableIterator<>(namedActions.iterator()); |
| } |
| } |
| |
| private static class ActionListenerList extends WTKListenerList<ActionListener> implements |
| ActionListener { |
| @Override |
| public void enabledChanged(Action action) { |
| for (ActionListener listener : this) { |
| listener.enabledChanged(action); |
| } |
| } |
| } |
| |
| private static class ActionClassListenerList extends WTKListenerList<ActionClassListener> |
| implements ActionClassListener { |
| @Override |
| public void actionAdded(String id) { |
| for (ActionClassListener listener : this) { |
| listener.actionAdded(id); |
| } |
| } |
| |
| @Override |
| public void actionUpdated(String id, Action previousAction) { |
| for (ActionClassListener listener : this) { |
| listener.actionUpdated(id, previousAction); |
| } |
| } |
| |
| @Override |
| public void actionRemoved(String id, Action action) { |
| for (ActionClassListener listener : this) { |
| listener.actionRemoved(id, action); |
| } |
| } |
| } |
| |
| private boolean enabled = true; |
| |
| private ActionListenerList actionListeners = new ActionListenerList(); |
| |
| private static HashMap<String, Action> namedActions = new HashMap<>(); |
| private static NamedActionDictionary namedActionDictionary = new NamedActionDictionary(); |
| |
| private static ActionClassListenerList actionClassListeners = new ActionClassListenerList(); |
| |
| public Action() { |
| this(true); |
| } |
| |
| public Action(boolean enabled) { |
| setEnabled(enabled); |
| } |
| |
| /** |
| * Returns a text description of the action. Subclasses should override this |
| * to return a meaningful description if one is needed. |
| * |
| * @return The text description of the action. |
| */ |
| public String getDescription() { |
| return null; |
| } |
| |
| /** |
| * Performs the action. |
| * |
| * @param source The component that initiated the action. |
| */ |
| public abstract void perform(Component source); |
| |
| public boolean isEnabled() { |
| return enabled; |
| } |
| |
| public void setEnabled(boolean enabled) { |
| if (this.enabled != enabled) { |
| this.enabled = enabled; |
| actionListeners.enabledChanged(this); |
| } |
| } |
| |
| public static NamedActionDictionary getNamedActions() { |
| return namedActionDictionary; |
| } |
| |
| public ListenerList<ActionListener> getActionListeners() { |
| return actionListeners; |
| } |
| |
| public static ListenerList<ActionClassListener> getActionClassListeners() { |
| return actionClassListeners; |
| } |
| } |