[8378] | 1 | // License: GPL. For details, see LICENSE file.
|
---|
[115] | 2 | package org.openstreetmap.josm.gui;
|
---|
| 3 |
|
---|
[3754] | 4 | import static org.openstreetmap.josm.gui.help.HelpUtil.ht;
|
---|
[804] | 5 | import static org.openstreetmap.josm.tools.I18n.marktr;
|
---|
| 6 |
|
---|
| 7 | import java.awt.Color;
|
---|
[10078] | 8 | import java.awt.Dimension;
|
---|
[115] | 9 | import java.awt.Graphics;
|
---|
| 10 | import java.awt.geom.Rectangle2D;
|
---|
| 11 |
|
---|
[9954] | 12 | import javax.accessibility.Accessible;
|
---|
| 13 | import javax.accessibility.AccessibleContext;
|
---|
| 14 | import javax.accessibility.AccessibleValue;
|
---|
[115] | 15 | import javax.swing.JComponent;
|
---|
| 16 |
|
---|
[116] | 17 | import org.openstreetmap.josm.Main;
|
---|
[2252] | 18 | import org.openstreetmap.josm.gui.help.Helpful;
|
---|
[116] | 19 |
|
---|
[9954] | 20 | /**
|
---|
| 21 | * Map scale bar, displaying the distance in meter that correspond to 100 px on screen.
|
---|
| 22 | * @since 115
|
---|
| 23 | */
|
---|
| 24 | public class MapScaler extends JComponent implements Helpful, Accessible {
|
---|
[115] | 25 |
|
---|
[1169] | 26 | private final NavigatableComponent mv;
|
---|
[3530] | 27 |
|
---|
[10079] | 28 | private static final int PADDING_LEFT = 5;
|
---|
| 29 | private static final int PADDING_RIGHT = 50;
|
---|
[3530] | 30 |
|
---|
[9954] | 31 | /**
|
---|
| 32 | * Constructs a new {@code MapScaler}.
|
---|
| 33 | * @param mv map view
|
---|
| 34 | */
|
---|
[1722] | 35 | public MapScaler(NavigatableComponent mv) {
|
---|
[1169] | 36 | this.mv = mv;
|
---|
[10078] | 37 | setPreferredLineLength(100);
|
---|
[1169] | 38 | setOpaque(false);
|
---|
[115] | 39 | }
|
---|
| 40 |
|
---|
[10078] | 41 | /**
|
---|
| 42 | * Sets the preferred length the distance line should have.
|
---|
| 43 | * @param pixel The length.
|
---|
| 44 | */
|
---|
| 45 | public void setPreferredLineLength(int pixel) {
|
---|
| 46 | setPreferredSize(new Dimension(pixel + PADDING_LEFT + PADDING_RIGHT, 30));
|
---|
| 47 | }
|
---|
| 48 |
|
---|
[6792] | 49 | @Override
|
---|
| 50 | public void paint(Graphics g) {
|
---|
[1221] | 51 | g.setColor(getColor());
|
---|
[10078] | 52 |
|
---|
| 53 | double dist100Pixel = mv.getDist100Pixel(true);
|
---|
| 54 | TickMarks tickMarks = new TickMarks(dist100Pixel, getWidth() - PADDING_LEFT - PADDING_RIGHT);
|
---|
| 55 | tickMarks.paintTicks(g);
|
---|
[115] | 56 | }
|
---|
[155] | 57 |
|
---|
[9954] | 58 | /**
|
---|
| 59 | * Returns the color of map scaler.
|
---|
| 60 | * @return the color of map scaler
|
---|
| 61 | */
|
---|
[6889] | 62 | public static Color getColor() {
|
---|
[1221] | 63 | return Main.pref.getColor(marktr("scale"), Color.white);
|
---|
| 64 | }
|
---|
| 65 |
|
---|
[6084] | 66 | @Override
|
---|
[1169] | 67 | public String helpTopic() {
|
---|
[3754] | 68 | return ht("/MapView/Scaler");
|
---|
[155] | 69 | }
|
---|
[9954] | 70 |
|
---|
| 71 | @Override
|
---|
| 72 | public AccessibleContext getAccessibleContext() {
|
---|
| 73 | if (accessibleContext == null) {
|
---|
| 74 | accessibleContext = new AccessibleMapScaler();
|
---|
| 75 | }
|
---|
| 76 | return accessibleContext;
|
---|
| 77 | }
|
---|
| 78 |
|
---|
| 79 | class AccessibleMapScaler extends AccessibleJComponent implements AccessibleValue {
|
---|
| 80 |
|
---|
| 81 | @Override
|
---|
| 82 | public Number getCurrentAccessibleValue() {
|
---|
| 83 | return mv.getDist100Pixel();
|
---|
| 84 | }
|
---|
| 85 |
|
---|
| 86 | @Override
|
---|
| 87 | public boolean setCurrentAccessibleValue(Number n) {
|
---|
| 88 | return false;
|
---|
| 89 | }
|
---|
| 90 |
|
---|
| 91 | @Override
|
---|
| 92 | public Number getMinimumAccessibleValue() {
|
---|
| 93 | return null;
|
---|
| 94 | }
|
---|
| 95 |
|
---|
| 96 | @Override
|
---|
| 97 | public Number getMaximumAccessibleValue() {
|
---|
| 98 | return null;
|
---|
| 99 | }
|
---|
| 100 | }
|
---|
[10078] | 101 |
|
---|
| 102 | /**
|
---|
| 103 | * This class finds the best possible tick mark positions.
|
---|
| 104 | * <p>
|
---|
| 105 | * It will attempt to use steps of 1m, 2.5m, 10m, 25m, ...
|
---|
| 106 | */
|
---|
| 107 | private static final class TickMarks {
|
---|
| 108 |
|
---|
| 109 | private final double dist100Pixel;
|
---|
| 110 | private final double lineDistance;
|
---|
| 111 | /**
|
---|
| 112 | * Distance in meters between two ticks.
|
---|
| 113 | */
|
---|
| 114 | private final double spacingMeter;
|
---|
| 115 | private final int steps;
|
---|
[10504] | 116 | private final int minorStepsPerMajor;
|
---|
[10078] | 117 |
|
---|
| 118 | /**
|
---|
| 119 | * Creates a new tick mark helper.
|
---|
| 120 | * @param dist100Pixel The distance of 100 pixel on the map.
|
---|
| 121 | * @param width The width of the mark.
|
---|
| 122 | */
|
---|
[10079] | 123 | TickMarks(double dist100Pixel, int width) {
|
---|
[10078] | 124 | this.dist100Pixel = dist100Pixel;
|
---|
| 125 | lineDistance = dist100Pixel * width / 100;
|
---|
| 126 |
|
---|
| 127 | double log10 = Math.log(lineDistance) / Math.log(10);
|
---|
| 128 | double spacingLog10 = Math.pow(10, Math.floor(log10));
|
---|
[10504] | 129 | int minorStepsPerMajor;
|
---|
| 130 | double distanceBetweenMinor;
|
---|
[10078] | 131 | if (log10 - Math.floor(log10) < .75) {
|
---|
[10504] | 132 | // Add 2 ticks for every full unit
|
---|
| 133 | distanceBetweenMinor = spacingLog10 / 2;
|
---|
| 134 | minorStepsPerMajor = 2;
|
---|
[10078] | 135 | } else {
|
---|
[10504] | 136 | // Add 10 ticks for every full unit
|
---|
| 137 | distanceBetweenMinor = spacingLog10;
|
---|
| 138 | minorStepsPerMajor = 5;
|
---|
[10078] | 139 | }
|
---|
[10504] | 140 | // round down to the last major step.
|
---|
| 141 | int majorSteps = (int) Math.floor(lineDistance / distanceBetweenMinor / minorStepsPerMajor);
|
---|
| 142 | if (majorSteps >= 4) {
|
---|
| 143 | // we have many major steps, do not paint the minor now.
|
---|
| 144 | this.spacingMeter = distanceBetweenMinor * minorStepsPerMajor;
|
---|
| 145 | this.minorStepsPerMajor = 1;
|
---|
| 146 | } else {
|
---|
| 147 | this.minorStepsPerMajor = minorStepsPerMajor;
|
---|
| 148 | this.spacingMeter = distanceBetweenMinor;
|
---|
| 149 | }
|
---|
| 150 | steps = majorSteps * this.minorStepsPerMajor;
|
---|
[10078] | 151 | }
|
---|
| 152 |
|
---|
[10504] | 153 | /**
|
---|
| 154 | * Paint the ticks to the graphics.
|
---|
| 155 | * @param g The graphics to paint on.
|
---|
| 156 | */
|
---|
[10078] | 157 | public void paintTicks(Graphics g) {
|
---|
| 158 | double spacingPixel = spacingMeter / (dist100Pixel / 100);
|
---|
| 159 | double textBlockedUntil = -1;
|
---|
| 160 | for (int step = 0; step <= steps; step++) {
|
---|
| 161 | int x = (int) (PADDING_LEFT + spacingPixel * step);
|
---|
[10504] | 162 | boolean isMajor = step % minorStepsPerMajor == 0;
|
---|
[10078] | 163 | int paddingY = isMajor ? 0 : 3;
|
---|
| 164 | g.drawLine(x, paddingY, x, 10 - paddingY);
|
---|
| 165 |
|
---|
[10504] | 166 | if (step == 0 || step == steps) {
|
---|
[10078] | 167 | String text;
|
---|
| 168 | if (step == 0) {
|
---|
| 169 | text = "0";
|
---|
| 170 | } else {
|
---|
| 171 | text = NavigatableComponent.getDistText(spacingMeter * step);
|
---|
| 172 | }
|
---|
| 173 | Rectangle2D bound = g.getFontMetrics().getStringBounds(text, g);
|
---|
| 174 | int left = (int) (x - bound.getWidth() / 2);
|
---|
[10504] | 175 | if (textBlockedUntil > left) {
|
---|
| 176 | left = (int) (textBlockedUntil + 5);
|
---|
[10078] | 177 | }
|
---|
[10504] | 178 | g.drawString(text, left, 23);
|
---|
| 179 | textBlockedUntil = left + bound.getWidth() + 2;
|
---|
[10078] | 180 | }
|
---|
| 181 | }
|
---|
| 182 | g.drawLine(PADDING_LEFT + 0, 5, (int) (PADDING_LEFT + spacingPixel * steps), 5);
|
---|
| 183 | }
|
---|
| 184 | }
|
---|
[115] | 185 | }
|
---|