Jimbo.Cheerlights.BlinktLights.java Source code

Introduction

Here is the source code for Jimbo.Cheerlights.BlinktLights.java

Source

/*
 * Copyright (C) 2017 Jim Darby.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library.  If not, see
 * <http://www.gnu.org/licenses/>.
 */

package Jimbo.Cheerlights;

import java.util.logging.Logger;
import java.util.logging.Level;
import java.io.IOException;
import java.net.UnknownHostException;

import Jimbo.Boards.com.pimoroni.Blinkt;

import org.apache.commons.cli.ParseException;
import org.eclipse.paho.client.mqttv3.MqttException;

/**
 * This class handles Cheerlights on the Pimoroni Blinkt.
 * 
 * @author Jim Darby
 */
public class BlinktLights implements CheerListener {
    private static final Logger LOG = Logger.getLogger("BlinktLights");

    public BlinktLights() {
        LOG.log(Level.INFO, "Blinkt cheer lights started");

        blinkt = new Blinkt();

        for (int i = 0; i < data.length; ++i)
            data[i] = 0;
    }

    /**
     * Update the lights with a new colour.
     * 
     * @param colour The colour to update with
     * @throws IOException In case of problems
     */
    @Override
    public synchronized void update(int colour) throws IOException {
        LOG.log(Level.INFO, "Update new colour {0}", Integer.toHexString(colour));

        int[] next = new int[data.length];

        for (int i = 1; i < data.length; ++i)
            next[i] = data[i - 1];

        next[0] = colour;

        for (int step = 1; step <= 100; ++step) {
            final int left = 100 - step;

            for (int i = 0; i < data.length; ++i) {
                final int r = (step * ((next[i] >> 16) & 0xff) + left * ((data[i] >> 16) & 0xff)) / 100;
                final int g = (step * ((next[i] >> 8) & 0xff) + left * ((data[i] >> 8) & 0xff)) / 100;
                final int b = (step * ((next[i]) & 0xff) + left * ((data[i]) & 0xff)) / 100;

                blinkt.set(i, r, g, b, 8);
            }

            blinkt.show();

            try {
                Thread.sleep(100);
            }

            catch (InterruptedException e) {
                LOG.log(Level.WARNING, "Interrupted sleep?");
            }
        }

        data = next;
    }

    public static void main(String args[])
            throws IOException, UnknownHostException, InterruptedException, ParseException, MqttException {
        // Set up simpler logging to stdout
        Jimbo.Logging.Logging.useStdout();

        final CheerListener target = new BlinktLights();

        Listener.setup(args, target);
    }

    final Blinkt blinkt;
    int[] data = new int[Blinkt.WIDTH];
}