1 package org.simantics.maps.sg;
3 import java.awt.AlphaComposite;
4 import java.awt.BasicStroke;
7 import java.awt.FontMetrics;
8 import java.awt.Graphics2D;
9 import java.awt.geom.AffineTransform;
10 import java.awt.geom.Point2D;
11 import java.awt.geom.Rectangle2D;
12 import java.util.Locale;
14 import org.geotools.referencing.CRS;
15 import org.geotools.referencing.GeodeticCalculator;
16 import org.opengis.referencing.FactoryException;
17 import org.opengis.referencing.crs.CoordinateReferenceSystem;
18 import org.simantics.scenegraph.g2d.G2DNode;
19 import org.simantics.scenegraph.utils.GridUtils;
21 public class MapScaleNode extends G2DNode {
23 private static final long serialVersionUID = -2738682328944298290L;
25 private static final Color GRAY = new Color(100, 100, 100);
27 protected Boolean enabled = true;
29 protected double gridSize = 1.0;
34 public void render(Graphics2D g) {
38 AffineTransform tr = g.getTransform();
39 double scaleX = Math.abs(tr.getScaleX());
40 double scaleY = Math.abs(tr.getScaleY());
41 if (scaleX <= 0 || scaleY <= 0) {
42 // Make sure that we don't end up in an eternal loop below.
45 double offsetX = tr.getTranslateX();
46 double offsetY = tr.getTranslateY();
47 g.setTransform(new AffineTransform());
49 Font rulerFont = new Font("Tahoma", Font.PLAIN, 9);
51 //g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
52 g.setStroke(new BasicStroke(1));
53 g.setColor(new Color(0.9f, 0.9f, 0.9f, 0.75f));
55 Rectangle2D bounds = g.getClipBounds();
56 if(bounds == null) return; // FIXME
58 double previousText = -100;
60 double minY = bounds.getMaxY() - 30;
62 double scaleRight = bounds.getMaxX() - 30;
64 double meterPerPixel = getMeterPerPixel(scaleRight - offsetX, minY - offsetY, scaleX, scaleY);
68 for (int i = 0; i < SCALE_VALUES.length; i++) {
69 value = SCALE_VALUES[i];
70 pixels = value / meterPerPixel;
77 double newScaleLeft = scaleRight - pixels;
78 g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.8f));
79 Rectangle2D vertical = new Rectangle2D.Double(newScaleLeft, bounds.getMaxY() - 30, pixels, 20);
86 // stepX and stepY should be something between 50 and 100
89 stepX = GridUtils.limitedEvenGridSpacing(stepX, scaleX, 100, gridSize, true);
90 //while(stepX * scaleX > 100) stepX /= 2;
91 //while(stepY * scaleY > 100) stepY /= 2;
93 while(stepX * scaleX < 50) stepX *= 2;
97 double gap = scaleRight -newScaleLeft;
99 stepX = gap / 2 - 0.00001;
103 for(double x = newScaleLeft; x < scaleRight; x += stepX) {
104 String str = formatValue(label * meterPerPixel);
105 FontMetrics fm = g.getFontMetrics();
106 Rectangle2D r = fm.getStringBounds(str, g);
107 if((x - r.getWidth() / 2) > previousText) {
108 g.setColor(Color.BLACK);
109 g.drawString(str, (int)(x-r.getWidth()/2), (int)(minY+1+r.getHeight()));
110 previousText = x+r.getWidth()/2+stepX/4;
114 g.drawLine((int)x, (int)minY+12, (int)x, (int)minY+19);
115 if (x + 0.1 < scaleRight) {
117 for(double x2 = x+stepX/5; x2 < x+stepX; x2+=stepX/5) {
119 g.drawLine((int)x2, (int)minY+15, (int)x2, (int)minY+19);
122 for(double x2 = x+stepX/10; x2 < x+stepX; x2+=stepX/5) {
124 g.drawLine((int)x2, (int)minY+17, (int)x2, (int)minY+19);
136 public Rectangle2D getBoundsInLocal() {
140 private static final transient int MAX_DIGITS = 0;
141 private static final transient double EPSILON = 0.01;
142 private static final transient double TRIM_THRESHOLD_MAX_VALUE = Math.pow(10, 2);
143 private static final transient String[] SI_UNIT_LARGE_PREFIXES = { "m", "km" };
145 private static final transient double[] SCALE_VALUES = { 2, 5, 10, 20, 50, 100, 200, 500, 1000, 2000, 5000, 10000, 20000, 50000, 100000, 200000, 500000, 1000000, 2000000, 50000000 };
147 public static String formatValue(double value) {
148 int magnitude = (int) Math.round(Math.log10(value));
149 //System.out.println("magnitude: " + magnitude + ", " + value);
150 int allowedDecimals = MAX_DIGITS;
151 allowedDecimals -= Math.abs(magnitude);
152 if (allowedDecimals < 0)
155 String valueStr = String.format(Locale.US, "%." + allowedDecimals + "f", value);
156 if (allowedDecimals > 0) {
157 for (int trunc = valueStr.length() - 1; trunc > 0; --trunc) {
158 char ch = valueStr.charAt(trunc);
160 valueStr = valueStr.substring(0, trunc);
163 if (valueStr.charAt(trunc) != '0') {
164 valueStr = valueStr.substring(0, trunc + 1);
168 if (Math.abs(value) + EPSILON > TRIM_THRESHOLD_MAX_VALUE) {
169 // Cut anything beyond a possible decimal dot out since they
170 // should not show anyway. This is a complete hack that tries to
171 // circumvent floating-point inaccuracy problems.
172 int dotIndex = valueStr.lastIndexOf('.');
174 valueStr = valueStr.substring(0, dotIndex);
179 if (valueStr.equals("-0"))
182 // if (!valueStr.equals("0")) {
183 // double trimValue = value;
184 // for (int i = 0; i < SI_UNIT_LARGE_PREFIXES.length; i++) {
185 // double trim = trimValue / 1000;
186 // if (Math.abs(trim)-EPSILON < TRIM_THRESHOLD_MAX_VALUE) {
187 // valueStr = valueStr.substring(0, valueStr.length() - (i + 1) * 3);
188 // valueStr += SI_UNIT_LARGE_PREFIXES[i];
198 public void setEnabled(boolean enabled) {
199 this.enabled = enabled;
202 public void setScale(double scale) {
209 EPSG4326 = CRS.decode("EPSG:4326");
210 calculator = new GeodeticCalculator(EPSG4326);
211 } catch (FactoryException e) {
217 GeodeticCalculator calculator;
218 CoordinateReferenceSystem EPSG4326;
220 public Point2D scaleLeftmostPoint(double startLon, double startLat, double distance, double azimuth) {
221 GeodeticCalculator calculator = new GeodeticCalculator();
222 calculator.setStartingGeographicPoint(startLon, startLat);
223 calculator.setDirection(azimuth, distance);
224 return calculator.getDestinationGeographicPoint();
227 public double getMeterPerPixel(double screenX, double screenY, double scaleX, double scaleY) {
228 double startLon = (screenX / scaleX) / scale;
229 double val = (screenY / scaleY) / scale;
230 val = Math.toDegrees(Math.atan(Math.sinh(Math.toRadians(val))));
231 double startLat = val;
232 double endLon = ((screenX + 1) / scaleX) / scale;
235 calculator.setStartingGeographicPoint(startLon, startLat);
236 calculator.setDestinationGeographicPoint(endLon, endLat);
237 double distance = calculator.getOrthodromicDistance();