Mercurial > hg > release > thermostat-1.6
view client/swing/src/main/java/com/redhat/thermostat/client/swing/components/experimental/Timeline.java @ 2049:a92d602216ad
Update copyright license headers for 2017
PR3290
Reviewed-by: jerboaa
Review-thread: http://icedtea.classpath.org/pipermail/thermostat/2017-January/021974.html
author | Andrew Azores <aazores@redhat.com> |
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date | Tue, 17 Jan 2017 12:19:56 -0500 |
parents | 31f274ab27a5 |
children |
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/* * Copyright 2012-2017 Red Hat, Inc. * * This file is part of Thermostat. * * Thermostat is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published * by the Free Software Foundation; either version 2, or (at your * option) any later version. * * Thermostat 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 GNU General Public License * along with Thermostat; see the file COPYING. If not see * <http://www.gnu.org/licenses/>. * * Linking this code with other modules is making a combined work * based on this code. Thus, the terms and conditions of the GNU * General Public License cover the whole combination. * * As a special exception, the copyright holders of this code give * you permission to link this code with independent modules to * produce an executable, regardless of the license terms of these * independent modules, and to copy and distribute the resulting * executable under terms of your choice, provided that you also * meet, for each linked independent module, the terms and conditions * of the license of that module. An independent module is a module * which is not derived from or based on this code. If you modify * this code, you may extend this exception to your version of the * library, but you are not obligated to do so. If you do not wish * to do so, delete this exception statement from your version. */ package com.redhat.thermostat.client.swing.components.experimental; import java.awt.Color; import java.awt.Dimension; import java.awt.Font; import java.awt.GradientPaint; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.Paint; import java.awt.Rectangle; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Date; import java.util.List; import java.util.concurrent.TimeUnit; import com.redhat.thermostat.client.swing.GraphicsUtils; import com.redhat.thermostat.client.swing.components.GradientPanel; import com.redhat.thermostat.client.ui.Palette; import com.redhat.thermostat.common.model.LongRangeNormalizer; import com.redhat.thermostat.common.model.Range; /** * Displays a timeline between the specified start and stop ranges, dynamically * adjusting itself as needed. The values of the ranges are interpreted as * timestamps in milliseconds. */ @SuppressWarnings("serial") public class Timeline extends GradientPanel { /** Default height of this component. Subclasses may use different values */ public static final int DEFAULT_HEIGHT = 25; private Range<Long> range; public Timeline(Range<Long> range) { super(Palette.LIGHT_GRAY.getColor(), Palette.WHITE.getColor()); setFont(TimelineUtils.FONT); this.range = range; } public Range<Long> getRange() { return range; } public void setRange(Range<Long> newRange) { this.range = newRange; repaint(); } @Override public int getHeight() { return DEFAULT_HEIGHT; } @Override public Dimension getMaximumSize() { Dimension dim = super.getMaximumSize(); dim.height = getHeight(); return dim; } @Override public Dimension getMinimumSize() { Dimension dim = super.getMinimumSize(); dim.height = getHeight(); return dim; } @Override public Dimension getPreferredSize() { Dimension dim = super.getPreferredSize(); dim.height = getHeight(); return dim; } @Override public Dimension getSize() { return getPreferredSize(); } @Override protected void paintComponent(Graphics g) { super.paintComponent(g); if (range == null) { return; } Graphics2D graphics = GraphicsUtils.getInstance().createAAGraphics(g); Rectangle bounds = g.getClipBounds(); TimeUnit timeUnitForTicks = getBestTimeUnit(); drawTicks(graphics, bounds, timeUnitForTicks); if (isEnabled()) { graphics.setColor(Palette.THERMOSTAT_BLU.getColor()); } else { graphics.setColor(Color.GRAY); } graphics.drawLine(bounds.x, bounds.height - 1, bounds.width, bounds.height - 1); graphics.dispose(); } /** * Returns a TimeUnit and the number of subticks needed for that TimeUnit * need to display the current range */ private TimeUnit getBestTimeUnit() { long min = range.getMin(); long max = range.getMax(); List<TimeUnit> units = new ArrayList<>(); units.add(TimeUnit.DAYS); units.add(TimeUnit.HOURS); units.add(TimeUnit.MINUTES); units.add(TimeUnit.SECONDS); units.add(TimeUnit.MILLISECONDS); /* Find the largest unit of time suitable for the range */ for (TimeUnit unit: units) { long millis = unit.toMillis(1); if (Math.abs(max - min) >= millis) { return unit; } } return null; } private void drawTicks(Graphics2D graphics, Rectangle bounds, TimeUnit tickUnit) { Font font = graphics.getFont(); int widthOfOneCharacter = (int) font.getStringBounds("0", graphics.getFontRenderContext()).getWidth(); long deltaInMilliseconds = Math.max(1, tickUnit.toMillis(1) / 10); // some heuristics for spacing int targetNumberOfIntervals = (int) (getWidth() / (10 * widthOfOneCharacter) / 1.3); while ((range.getMax() - range.getMin()) / deltaInMilliseconds > targetNumberOfIntervals) { deltaInMilliseconds *= 2; } long start = (range.getMin() / deltaInMilliseconds) * deltaInMilliseconds; long end = range.getMax(); DateFormat df = null; switch (tickUnit) { case DAYS: df = new SimpleDateFormat("YY-MM-dd"); break; case HOURS: df = new SimpleDateFormat("hh:mm a"); break; case MINUTES: df = new SimpleDateFormat("hh:mm a"); break; case SECONDS: df = new SimpleDateFormat("mm.ss"); break; default: df = new SimpleDateFormat("hh:mm:ss a"); } Paint gradient = new GradientPaint(0, 0, Palette.WHITE.getColor(), 0, getHeight(), Palette.GRAY.getColor()); LongRangeNormalizer normalizer = new LongRangeNormalizer(range, new Range<Long>(0l, (long)bounds.width)); for (long i = start; i < end; i += deltaInMilliseconds) { int x = (int) normalizer.getValueNormalized(i); if (isEnabled()) { graphics.setColor(Palette.THERMOSTAT_BLU.getColor()); } else { graphics.setColor(Color.GRAY); } graphics.drawLine(x, 0, x, bounds.height); graphics.setPaint(gradient); String value = df.format(new Date(i)); int stringWidth = (int) font.getStringBounds(value, graphics.getFontRenderContext()).getWidth() - 1; int stringHeight = (int) font.getStringBounds(value, graphics.getFontRenderContext()).getHeight(); graphics.fillRect(x + 1, bounds.y + 5, stringWidth + 4, stringHeight + 4); if (isEnabled()) { graphics.setColor(Palette.THERMOSTAT_BLU.getColor()); } else { graphics.setColor(Color.GRAY); } graphics.drawString(value, x + 1, bounds.y + stringHeight + 5); } } }