Java tutorial
/* Copyright 2008-2011 Gephi Authors : Mathieu Bastian Website : http://www.gephi.org This file is part of Gephi. DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. Copyright 2011 Gephi Consortium. All rights reserved. The contents of this file are subject to the terms of either the GNU General Public License Version 3 only ("GPL") or the Common Development and Distribution License("CDDL") (collectively, the "License"). You may not use this file except in compliance with the License. You can obtain a copy of the License at http://gephi.org/about/legal/license-notice/ or /cddl-1.0.txt and /gpl-3.0.txt. See the License for the specific language governing permissions and limitations under the License. When distributing the software, include this License Header Notice in each file and include the License files at /cddl-1.0.txt and /gpl-3.0.txt. If applicable, add the following below the License Header, with the fields enclosed by brackets [] replaced by your own identifying information: "Portions Copyrighted [year] [name of copyright owner]" If you wish your version of this file to be governed by only the CDDL or only the GPL Version 3, indicate your decision by adding "[Contributor] elects to include this software in this distribution under the [CDDL or GPL Version 3] license." If you do not indicate a single choice of license, a recipient has the option to distribute your version of this file under either the CDDL, the GPL Version 3 or to extend the choice of license to its licensees as provided above. However, if you add GPL Version 3 code and therefore, elected the GPL Version 3 license, then the option applies only if the new code is made subject to such option by the copyright holder. Contributor(s): Portions Copyrighted 2011 Gephi Consortium. */ package org.gephi.desktop.timeline; import java.awt.Font; import java.awt.FontMetrics; import java.awt.Graphics2D; import java.awt.RenderingHints; import java.awt.image.BufferedImage; import org.gephi.dynamic.api.DynamicModel.TimeFormat; import org.gephi.timeline.api.TimelineModel; import org.joda.time.Interval; /** * * @author Mathieu Bastian */ public class TickGraph { private double min; private double max; private TickParameters parameters; private BufferedImage image; public BufferedImage getImage(TimelineModel model, int width, int height) { double newMin = model.getCustomMin(); double newMax = model.getCustomMax(); TickParameters.TickType timeFormat = model.getTimeFormat().equals(TimeFormat.DOUBLE) ? TickParameters.TickType.DOUBLE : TickParameters.TickType.DATE; if (parameters == null || newMax != max || newMin != min || parameters.getWidth() != width || parameters.getHeight() != height || !parameters.getType().equals(timeFormat)) { min = newMin; max = newMax; parameters = new TickParameters(timeFormat); parameters.setWidth(width); parameters.setHeight(height); image = draw(); } return image; } private BufferedImage draw() { final BufferedImage image = new BufferedImage(parameters.getWidth(), parameters.getHeight(), BufferedImage.TYPE_INT_ARGB); final Graphics2D g = image.createGraphics(); g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); if (parameters.getType().equals(TickParameters.TickType.DATE)) { drawDate(g); } else { drawReal(g); } return image; } private void drawDate(Graphics2D g) { int width = parameters.getWidth(); int height = parameters.getHeight(); //Font int fontSize = Math.min(parameters.getFontSize(), (int) (height / 4.)); fontSize = fontSize > parameters.getFontSize() / 4 && fontSize <= parameters.getFontSize() / 2 ? parameters.getFontSize() / 2 : fontSize; FontMetrics smallMetrics = null; Font smallFont = parameters.getFont(); Font bigFont; FontMetrics bigMetrics; if (smallFont != null && fontSize > parameters.getFontSize() / 4) { smallFont = smallFont.deriveFont(Font.PLAIN, fontSize); smallMetrics = g.getFontMetrics(smallFont); bigFont = smallFont.deriveFont(Font.PLAIN, (int) (fontSize * 2.5)); bigMetrics = g.getFontMetrics(bigFont); } else { smallFont = null; bigFont = null; } DateTick dateTick = DateTick.create(min, max, width); int TOP_TICK = 0; int LOWER_TICK = 1; //Lower tick if (dateTick.getTypeCount() > 1) { g.setFont(smallFont); g.setColor(parameters.getDateColor(LOWER_TICK)); Interval[] intervals = dateTick.getIntervals(LOWER_TICK); int labelWidth = smallMetrics != null ? smallMetrics.stringWidth("0000") : 0; for (Interval interval : intervals) { long ms = interval.getStartMillis(); int x = dateTick.getTickPixelPosition(ms, width); if (x >= 0) { g.setColor(parameters.getDateColor(LOWER_TICK)); //Height int h = (int) (Math.min(40, (int) (height / 15.0))); //Draw line g.drawLine(x, 0, x, h); //Label if (smallFont != null && width / intervals.length > labelWidth) { String label = dateTick.getTickValue(LOWER_TICK, interval.getStart()); int xLabel = x + 4; g.setColor(parameters.getDateColor(1)); int y = (int) (fontSize * 1.2); g.drawString(label, xLabel, y); } } } } //Top tick if (dateTick.getTypeCount() > 0) { g.setFont(bigFont); g.setColor(parameters.getDateColor(TOP_TICK)); Interval[] intervals = dateTick.getIntervals(TOP_TICK); for (Interval interval : intervals) { long ms = interval.getStartMillis(); int x = dateTick.getTickPixelPosition(ms, width); if (x >= 0) { g.setColor(parameters.getDateColor(TOP_TICK)); //Height int h = height; //Draw Line g.drawLine(x, 0, x, h); //Label if (bigFont != null) { String label = dateTick.getTickValue(TOP_TICK, interval.getStart()); int xLabel = x + 4; g.setColor(parameters.getDateColor(TOP_TICK)); int y = (int) (fontSize * 4); g.drawString(label, xLabel, y); } } else if (x > ((dateTick.getTickPixelPosition(interval.getEndMillis(), width) - x) / -2)) { if (bigFont != null) { String label = dateTick.getTickValue(TOP_TICK, interval.getStart()); g.setColor(parameters.getDateColor(TOP_TICK)); int y = (int) (fontSize * 4); g.drawString(label, 4, y); } } } } } private void drawStartEnd(Graphics2D g) { int width = parameters.getWidth(); int height = parameters.getHeight(); //Font Font font = parameters.getFont(); FontMetrics fontMetrics = null; int fontSize = Math.min(parameters.getFontSize(), (int) (height / 4.)); fontSize = fontSize > parameters.getFontSize() / 4 && fontSize <= parameters.getFontSize() / 2 ? parameters.getFontSize() / 2 : fontSize; if (font != null && fontSize > parameters.getFontSize() / 4) { font = font.deriveFont(Font.PLAIN, fontSize); fontMetrics = g.getFontMetrics(font); g.setFont(font); } else { font = null; } if (font != null) { g.setColor(parameters.getRealColor(2)); StartEndTick startEnd = StartEndTick.create(min, max); String labelStart = startEnd.getStartValue(); String labelEnd = startEnd.getEndValue(); int xEnd = width - (fontMetrics.stringWidth(labelEnd)) - (int) (fontSize * 0.3); g.drawString(labelStart, (int) (fontSize * 0.3), (int) (fontSize * 1.2)); g.drawString(labelEnd, xEnd, (int) (fontSize * 1.2)); } } private void drawReal(Graphics2D g) { int width = parameters.getWidth(); int height = parameters.getHeight(); //Font Font font = parameters.getFont(); FontMetrics fontMetrics = null; double factor = parameters.getFontFactor(); int fontSize = Math.min(parameters.getFontSize(), (int) (height / factor)); fontSize = fontSize > parameters.getFontSize() / (factor * 2) && fontSize <= parameters.getFontSize() / (factor / 4) ? (int) (parameters.getFontSize() / (factor / 4)) : fontSize; if (font != null && fontSize > parameters.getFontSize() / (factor / 2)) { font = font.deriveFont(Font.PLAIN, fontSize); fontMetrics = g.getFontMetrics(font); g.setFont(font); } else { font = null; } //50 // int fifty = (int) ((50 - min) * (width / (max - min))); // g.setColor(Color.BLUE); // g.drawLine(fifty, 0, fifty, height); RealTick graduation = RealTick.create(min, max, width); int numberTicks = graduation.getNumberTicks(); for (int i = 0; i <= numberTicks; i++) { int x = graduation.getTickPixelPosition(i, width); int rank = graduation.getTickRank(i); int h = Math.min(40, (int) (height / 15.0)); h = rank == 2 ? (int) (h + h) : rank == 1 ? (int) (h + h / 2.) : h; if (x > 0) { g.setColor(parameters.getRealColor(rank)); g.drawLine(x, 0, x, h); if (font != null && rank >= 1) { String label = graduation.getTickValue(i); int xLabel = x - (fontMetrics.stringWidth(label) / 2); g.drawString(label, xLabel, (int) (h + fontSize * 1.2)); } } } } }