net.dermetfan.gdx.scenes.scene2d.EventMultiplexer Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of libgdx-utils Show documentation

support library for libGDX

There is a newer version: 0.13.4

/** Copyright 2014 Robin Stumm ([email protected], http://dermetfan.net)
 *
 *  Licensed 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 net.dermetfan.gdx.scenes.scene2d;

import com.badlogic.gdx.scenes.scene2d.Event;
import com.badlogic.gdx.scenes.scene2d.EventListener;
import com.badlogic.gdx.utils.Array;
import net.dermetfan.gdx.Multiplexer;

/** an {@link EventListener} that notifies an array of other EventListeners
 *  @author dermetfan */
public class EventMultiplexer extends Multiplexer implements EventListener {

	/** recurses into EventMultiplexers
	 *  @since 0.9.0
	 *  @see Array#contains(Object, boolean) */
	public static boolean contains(Array listeners, EventListener listener, boolean identity) {
		for(int i = listeners.size - 1; i >= 0; i--) {
			Object it = listeners.get(i);
			if((identity ? it == listener : it.equals(listener)) || it instanceof EventMultiplexer && contains(((EventMultiplexer) it).getReceivers(), listener, identity))
				return true;
		}
		return false;
	}

	public EventMultiplexer(EventListener... receivers) {
		super(receivers);
	}

	public EventMultiplexer(Array receivers) {
		super(receivers);
	}

	/** @return if one of the {@link #receivers} returned true in {@link EventListener#handle(com.badlogic.gdx.scenes.scene2d.Event) handle(Event)} */
	@Override
	public boolean handle(Event event) {
		boolean handled = false;
		for(EventListener listener : receivers)
			handled |= listener.handle(event);
		return handled;
	}

}