org.smallmind.javafx.extras.instrument.TimeAxis.java Source code

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Here is the source code for org.smallmind.javafx.extras.instrument.TimeAxis.java

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/*
 * Copyright (c) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 David Berkman
 * 
 * This file is part of the SmallMind Code Project.
 * 
 * The SmallMind Code Project is free software, you can redistribute
 * it and/or modify it under the terms of GNU Affero General Public
 * License as published by the Free Software Foundation, either version 3
 * of the License, or (at your option) any later version.
 * 
 * The SmallMind Code Project 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
 * General Public License for more details.
 * 
 * You should have received a copy of the the GNU Affero General Public
 * License, along with the SmallMind Code Project. If not, see
 * <http://www.gnu.org/licenses/>.
 * 
 * Additional permission under the GNU Affero GPL version 3 section 7
 * ------------------------------------------------------------------
 * If you modify this Program, or any covered work, by linking or
 * combining it with other code, such other code is not for that reason
 * alone subject to any of the requirements of the GNU Affero GPL
 * version 3.
 */
package org.smallmind.javafx.extras.instrument;

import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicLong;
import javafx.beans.property.BooleanProperty;
import javafx.beans.property.SimpleBooleanProperty;
import javafx.scene.chart.ValueAxis;
import org.joda.time.DateTime;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;

public class TimeAxis extends ValueAxis<Long> {

    private static final DateTimeFormatter DATE_TIME_FORMATTER = DateTimeFormat.forPattern("HH:mm:ss");
    private static final ScheduledExecutorService SCHEDULED_EXECUTOR = Executors.newScheduledThreadPool(2,
            new ThreadFactory() {

                @Override
                public Thread newThread(final Runnable runnable) {

                    Thread thread = new Thread(runnable);

                    thread.setDaemon(true);

                    return thread;
                }
            });

    private final ScheduledFuture<?> future;
    private final AtomicLong millisecondSpan;
    private final BooleanProperty pausedProperty = new SimpleBooleanProperty(false);

    public TimeAxis(long spanInMilliseconds) {

        millisecondSpan = new AtomicLong(spanInMilliseconds);

        setAutoRanging(false);
        setTickLabelRotation(90);

        updateTime();

        future = SCHEDULED_EXECUTOR.scheduleAtFixedRate(new Runnable() {

            @Override
            public void run() {

                updateTime();
            }
        }, 1, 1, TimeUnit.SECONDS);
    }

    public TimeAxis(String axisLabel, long spanInMilliseconds) {

        this(spanInMilliseconds);

        setLabel(axisLabel);
    }

    private void updateTime() {

        if (!getPaused()) {

            long now = System.currentTimeMillis();

            setLowerBound(now - millisecondSpan.get());
            setUpperBound(now);
        }
    }

    public BooleanProperty pausedProperty() {

        return pausedProperty;
    }

    public boolean getPaused() {

        return pausedProperty.get();
    }

    public void setPaused(boolean paused) {

        pausedProperty.set(paused);
    }

    @Override
    protected void setRange(Object range, boolean animate) {

    }

    @Override
    protected Object getRange() {

        return new EndPoints<Long>((long) getLowerBound(), (long) getUpperBound());
    }

    @Override
    protected List<Long> calculateTickValues(double length, Object range) {

        LinkedList<Long> ticks = new LinkedList<Long>();
        DateTime origin = new DateTime(((EndPoints<Long>) range).getLow()).withMillisOfSecond(0);
        DateTime bound = new DateTime(((EndPoints<Long>) range).getHigh());
        int majorInterval;

        if ((majorInterval = (origin.getSecondOfMinute() / 15) + 1) < 4) {
            origin = origin.withSecondOfMinute(majorInterval * 15);
        } else {
            origin = origin.plusMinutes(1).withSecondOfMinute(0);
        }

        while (origin.isBefore(bound)) {
            ticks.add(origin.getMillis());
            origin = origin.plusSeconds(15);
        }

        return ticks;
    }

    @Override
    protected List<Long> calculateMinorTickMarks() {

        LinkedList<Long> ticks = new LinkedList<Long>();
        Object range = getRange();
        DateTime origin = new DateTime(((EndPoints<Long>) range).getLow()).withMillisOfSecond(0);
        DateTime bound = new DateTime(((EndPoints<Long>) range).getHigh());
        int minorInterval;

        if ((minorInterval = (origin.getSecondOfMinute() / 5) + 1) < 12) {
            origin = origin.withSecondOfMinute(minorInterval * 5);
        } else {
            origin = origin.plusMinutes(1).withSecondOfMinute(0);
        }

        while (origin.isBefore(bound)) {
            if ((origin.getSecondOfMinute() % 15) != 0) {
                ticks.add(origin.getMillis());
            }

            origin = origin.plusSeconds(5);
        }

        return ticks;
    }

    @Override
    protected String getTickMarkLabel(Long milliseconds) {

        return DATE_TIME_FORMATTER.print(new DateTime(milliseconds));
    }

    public void stop() {

        future.cancel(false);
    }
}