/**
* @(#)QuaquaLazyActionMap.java
*
* Copyright (c) 2008 The authors and contributors of JHotDraw.
* You may not use, copy or modify this file, except in compliance with the
* accompanying license terms.
*/
package org.jhotdraw.gui.plaf.palette;
import edu.umd.cs.findbugs.annotations.Nullable;
import java.lang.reflect.*;
import javax.swing.*;
import javax.swing.plaf.*;
/**
* QuaquaLazyActionMap.
*
* @author Werner Randelshofer
* @version $Id$
*/
public class PaletteLazyActionMap extends ActionMapUIResource {
private static final long serialVersionUID = 1L;
/**
* Object to invoke <code>loadActionMap</code> on. This may be
* a Class object.
*/
@Nullable private transient Object loader;
/**
* Installs an ActionMap that will be populated by invoking the
* <code>loadActionMap</code> method on the specified Class
* when necessary.
* <p>
* This should be used if the ActionMap can be shared.
*
* @param c JComponent to install the ActionMap on.
* @param loaderClass Class object that gets loadActionMap invoked
* on.
* @param defaultsKey Key to use to defaults table to check for
* existing map and what resulting Map will be registered on.
*/
static void installLazyActionMap(JComponent c, Class<?> loaderClass,
String defaultsKey) {
ActionMap map = (ActionMap)UIManager.get(defaultsKey);
if (map == null) {
map = new PaletteLazyActionMap(loaderClass);
UIManager.getLookAndFeelDefaults().put(defaultsKey, map);
}
SwingUtilities.replaceUIActionMap(c, map);
}
/**
* Returns an ActionMap that will be populated by invoking the
* <code>loadActionMap</code> method on the specified Class
* when necessary.
* <p>
* This should be used if the ActionMap can be shared.
*
* @param loaderClass Class object that gets loadActionMap invoked
* on.
* @param defaultsKey Key to use to defaults table to check for
* existing map and what resulting Map will be registered on.
*/
static ActionMap getActionMap(Class<?> loaderClass,
String defaultsKey) {
ActionMap map = (ActionMap)UIManager.get(defaultsKey);
if (map == null) {
map = new PaletteLazyActionMap(loaderClass);
UIManager.getLookAndFeelDefaults().put(defaultsKey, map);
}
return map;
}
private PaletteLazyActionMap(Class<?> loader) {
this.loader = loader;
}
public void put(Action action) {
put(action.getValue(Action.NAME), action);
}
@Override
public void put(Object key, Action action) {
loadIfNecessary();
super.put(key, action);
}
@Override
public Action get(Object key) {
loadIfNecessary();
return super.get(key);
}
@Override
public void remove(Object key) {
loadIfNecessary();
super.remove(key);
}
@Override
public void clear() {
loadIfNecessary();
super.clear();
}
@Override
public Object[] keys() {
loadIfNecessary();
return super.keys();
}
@Override
public int size() {
loadIfNecessary();
return super.size();
}
@Override
public Object[] allKeys() {
loadIfNecessary();
return super.allKeys();
}
@Override
public void setParent(ActionMap map) {
loadIfNecessary();
super.setParent(map);
}
@SuppressWarnings("unchecked")
private void loadIfNecessary() {
if (loader != null) {
Object ldr = loader;
loader = null;
Class<?> klass = (Class)ldr;
try {
Method method = klass.getDeclaredMethod("loadActionMap",
new Class<?>[] { PaletteLazyActionMap.class });
method.invoke(klass, new Object[] { this });
} catch (NoSuchMethodException nsme) {
assert false : "LazyActionMap unable to load actions " +
klass;
} catch (IllegalAccessException iae) {
assert false : "LazyActionMap unable to load actions " +
iae;
} catch (InvocationTargetException ite) {
assert false : "LazyActionMap unable to load actions " +
ite;
} catch (IllegalArgumentException iae) {
assert false : "LazyActionMap unable to load actions " +
iae;
}
}
}
}