DrawerHolder.java

package org.andork.awt.layout;

import java.util.WeakHashMap;

public class DrawerHolder {
	private DrawerLayoutDelegate delegate;
	private boolean animate;

	private final WeakHashMap<Object, Object> holders = new WeakHashMap<>();

	public DrawerHolder(DrawerLayoutDelegate delegate, boolean animate) {
		super();
		this.delegate = delegate;
		this.animate = animate;
	}

	public void hold(Object holder) {
		holders.put(holder, null);
		delegate.setOpen(!holders.isEmpty(), animate);
	}

	public boolean isHeld() {
		return !holders.isEmpty();
	}

	public boolean isHeldBy(Object holder) {
		return holders.containsKey(holder);
	}

	public void release(Object holder) {
		holders.remove(holder);
		delegate.setOpen(!holders.isEmpty(), animate);
	}

	public void releaseAll() {
		holders.clear();
		delegate.close(animate);
	}
}