com.jlabarca.director.Scene.java Source code

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Here is the source code for com.jlabarca.director.Scene.java

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/*
 * -----------------------------------------------------------------------
 * Copyright 2012 - Alistair Rutherford - www.netthreads.co.uk
 * -----------------------------------------------------------------------
 * 
 * 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 com.jlabarca.director;

import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.InputMultiplexer;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.graphics.g2d.Batch;
import com.badlogic.gdx.scenes.scene2d.Stage;
import com.badlogic.gdx.utils.Array;
import com.badlogic.gdx.utils.Scaling;
import com.badlogic.gdx.utils.viewport.ScalingViewport;

/**
 * Scene is a Stage which has input multiplexer.
 * 
 * Scenes are composed of layers.
 * 
 */
public class Scene extends Stage implements Node {
    private static final int DEFAULT_LAYER_CAPACITY = 10;

    /**
     * Associated input multiplexer.
     */
    private InputMultiplexer inputMultiplexer;

    /**
     * Stage elements as nodes. We need this so we can call enter and exit on
     * actors in order to manage registration and de-registration of event
     * handlers.
     */
    private Array<Node> nodes;

    /**
     * Constructor no parameters.
     * 
     */
    public Scene() {
        this(Director.instance().getWidth(), Director.instance().getHeight(), Director.instance().isStretch(),
                Director.instance().getSpriteBatch());
    }

    /**
     * Constructor where we supply our own sprite batch.
     * 
     * @param width
     * @param height
     * @param stretch
     * @param batch
     */
    public Scene(float width, float height, boolean stretch, Batch batch) {
        super(new ScalingViewport(Scaling.stretch, Gdx.graphics.getWidth(), Gdx.graphics.getHeight(),
                new OrthographicCamera()), batch);
        //super();
        inputMultiplexer = new InputMultiplexer(this);

        nodes = new Array<Node>(DEFAULT_LAYER_CAPACITY);
    }

    /**
     * Get input multiplexer.
     * 
     * @return The input multiplexer.
     */
    public InputMultiplexer getInputMultiplexer() {
        return inputMultiplexer;
    }

    /**
     * Add scene layer ensuring it adopts the same size as the owning scene.
     * 
     * Note layer in nodes list.
     * 
     * @param layer
     *            The new layer.
     */
    public void addLayer(Layer layer) {
        layer.setWidth(this.getWidth());
        layer.setHeight(this.getHeight());

        nodes.add(layer);

        addActor(layer);

    }

    /**
     * Remove scene layer.
     * 
     * @param layer
     *            The target layer.
     */
    public void removeLayer(Layer layer) {
        int index = nodes.indexOf(layer, false);
        if (index >= 0) {
            nodes.removeIndex(index);
            clear();
        }

    }

    /**
     * Handle pre-display tasks.
     * 
     */
    @Override
    public void enter() {
        int size = nodes.size;
        for (int i = 0; i < size; i++) {
            nodes.get(i).enter();
        }
    }

    /**
     * Handle post-display tasks.
     * 
     */
    @Override
    public void exit() {
        int size = nodes.size;
        for (int i = 0; i < size; i++) {
            nodes.get(i).exit();
        }
    }

}