AnimatedOverworldActor.java

package com.carterza.world;

import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.g2d.Animation;
import com.badlogic.gdx.graphics.g2d.Batch;
import com.badlogic.gdx.graphics.g2d.TextureRegion;
import com.badlogic.gdx.graphics.glutils.ShaderProgram;
import com.badlogic.gdx.math.Vector3;
import com.badlogic.gdx.scenes.scene2d.Actor;
import com.badlogic.gdx.scenes.scene2d.Group;
import com.badlogic.gdx.scenes.scene2d.InputEvent;
import com.badlogic.gdx.scenes.scene2d.InputListener;

/**
 * Created by zachcarter on 11/29/16.
 */
public class AnimatedOverworldActor extends Actor {
    Overworld overworld;
    Animation animation;
    ShaderProgram selectionShader;
    boolean targeted = false;
    float animationTime = 0;

    public AnimatedOverworldActor (final Overworld overworld, Animation animation, ShaderProgram selectionShader) {
        this.overworld = overworld;
        this.animation = animation;
        this.selectionShader = selectionShader;

        final AnimatedOverworldActor self = this;

        addListener(new InputListener() {
            public boolean touchDown (InputEvent event, float x, float y, int pointer, int button) {
                System.out.println("down");
                overworld.setSelectedActor(self);
                return true;
            }

            public void touchUp (InputEvent event, float x, float y, int pointer, int button) {
                System.out.println("up");
            }

            public void enter (InputEvent event, float x, float y, int pointer, Actor fromActor) {
                System.out.println("entered");
                targeted = true;
            }

            public void exit (InputEvent event, float x, float y, int pointer, Actor fromActor) {
                System.out.println("exited");
                targeted = false;
            }
        });
    }

    @Override
    public void act (float delta) {
        super.act(delta);
        animationTime += delta;
    }

    @Override
    public void draw (Batch batch, float parentAlpha) {
        TextureRegion region = animation.getKeyFrame(animationTime);
        Color color = getColor();
        batch.setColor(color.r, color.g, color.b, color.a * parentAlpha);
        
        boolean currentlyActive = overworld.getSelectedActor().equals(this);
        if(targeted && !currentlyActive) {
            region.getTexture().bind();
            selectionShader.begin();
            selectionShader.setUniformf("u_color", new Vector3(1,1,0));
            selectionShader.setUniformi("u_texture", 0);
            selectionShader.end();
            batch.setShader(selectionShader);
            batch.draw(region, getX(), getY(), getOriginX(), getOriginY(),
                    getWidth(), getHeight(), getScaleX(), getScaleY(), getRotation());
            batch.setShader(null);
        } else if(currentlyActive) {
            region.getTexture().bind();
            selectionShader.begin();
            selectionShader.setUniformf("u_color", new Vector3(0,1,0));
            selectionShader.setUniformi("u_texture", 0);
            selectionShader.end();
            batch.setShader(selectionShader);
            batch.draw(region, getX(), getY(), getOriginX(), getOriginY(),
                    getWidth(), getHeight(), getScaleX(), getScaleY(), getRotation());
            batch.setShader(null);
        } else {
            batch.draw(region, getX(), getY(), getOriginX(), getOriginY(),
                    getWidth(), getHeight(), getScaleX(), getScaleY(), getRotation());
        }
    }
}