1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.gui;
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3 |
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4 | import java.awt.Container;
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5 | import java.awt.Point;
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6 | import java.awt.geom.AffineTransform;
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7 | import java.awt.geom.Area;
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8 | import java.awt.geom.Path2D;
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9 | import java.awt.geom.Point2D;
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10 | import java.awt.geom.Point2D.Double;
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11 | import java.awt.geom.Rectangle2D;
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12 | import java.io.Serializable;
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13 | import java.util.Objects;
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14 | import java.util.Optional;
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15 |
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16 | import javax.swing.JComponent;
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17 |
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18 | import org.openstreetmap.josm.Main;
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19 | import org.openstreetmap.josm.data.Bounds;
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20 | import org.openstreetmap.josm.data.ProjectionBounds;
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21 | import org.openstreetmap.josm.data.coor.EastNorth;
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22 | import org.openstreetmap.josm.data.coor.LatLon;
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23 | import org.openstreetmap.josm.data.osm.Node;
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24 | import org.openstreetmap.josm.data.projection.Projecting;
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25 | import org.openstreetmap.josm.data.projection.Projection;
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26 | import org.openstreetmap.josm.gui.download.DownloadDialog;
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27 | import org.openstreetmap.josm.tools.CheckParameterUtil;
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28 | import org.openstreetmap.josm.tools.Geometry;
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29 | import org.openstreetmap.josm.tools.bugreport.BugReport;
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30 |
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31 | /**
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32 | * This class represents a state of the {@link MapView}.
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33 | * @author Michael Zangl
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34 | * @since 10343
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35 | */
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36 | public final class MapViewState implements Serializable {
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37 |
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38 | private static final long serialVersionUID = 1L;
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39 |
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40 | /**
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41 | * A flag indicating that the point is outside to the top of the map view.
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42 | * @since 10827
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43 | */
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44 | public static final int OUTSIDE_TOP = 1;
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45 |
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46 | /**
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47 | * A flag indicating that the point is outside to the bottom of the map view.
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48 | * @since 10827
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49 | */
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50 | public static final int OUTSIDE_BOTTOM = 2;
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51 |
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52 | /**
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53 | * A flag indicating that the point is outside to the left of the map view.
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54 | * @since 10827
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55 | */
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56 | public static final int OUTSIDE_LEFT = 4;
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57 |
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58 | /**
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59 | * A flag indicating that the point is outside to the right of the map view.
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60 | * @since 10827
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61 | */
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62 | public static final int OUTSIDE_RIGHT = 8;
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63 |
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64 | /**
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65 | * Additional pixels outside the view for where to start clipping.
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66 | */
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67 | private static final int CLIP_BOUNDS = 50;
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68 |
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69 | private final transient Projecting projecting;
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70 |
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71 | private final int viewWidth;
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72 | private final int viewHeight;
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73 |
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74 | private final double scale;
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75 |
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76 | /**
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77 | * Top left {@link EastNorth} coordinate of the view.
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78 | */
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79 | private final EastNorth topLeft;
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80 |
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81 | private final Point topLeftOnScreen;
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82 | private final Point topLeftInWindow;
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83 |
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84 | /**
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85 | * Create a new {@link MapViewState}
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86 | * @param projection The projection to use.
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87 | * @param viewWidth The view width
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88 | * @param viewHeight The view height
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89 | * @param scale The scale to use
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90 | * @param topLeft The top left corner in east/north space.
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91 | * @param topLeftInWindow The top left point in window
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92 | * @param topLeftOnScreen The top left point on screen
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93 | */
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94 | private MapViewState(Projecting projection, int viewWidth, int viewHeight, double scale, EastNorth topLeft,
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95 | Point topLeftInWindow, Point topLeftOnScreen) {
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96 | CheckParameterUtil.ensureParameterNotNull(projection, "projection");
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97 | CheckParameterUtil.ensureParameterNotNull(topLeft, "topLeft");
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98 | CheckParameterUtil.ensureParameterNotNull(topLeftInWindow, "topLeftInWindow");
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99 | CheckParameterUtil.ensureParameterNotNull(topLeftOnScreen, "topLeftOnScreen");
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100 |
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101 | this.projecting = projection;
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102 | this.scale = scale;
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103 | this.topLeft = topLeft;
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104 |
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105 | this.viewWidth = viewWidth;
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106 | this.viewHeight = viewHeight;
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107 | this.topLeftInWindow = topLeftInWindow;
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108 | this.topLeftOnScreen = topLeftOnScreen;
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109 | }
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110 |
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111 | private MapViewState(Projecting projection, int viewWidth, int viewHeight, double scale, EastNorth topLeft) {
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112 | this(projection, viewWidth, viewHeight, scale, topLeft, new Point(0, 0), new Point(0, 0));
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113 | }
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114 |
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115 | private MapViewState(EastNorth topLeft, MapViewState mvs) {
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116 | this(mvs.projecting, mvs.viewWidth, mvs.viewHeight, mvs.scale, topLeft, mvs.topLeftInWindow, mvs.topLeftOnScreen);
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117 | }
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118 |
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119 | private MapViewState(double scale, MapViewState mvs) {
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120 | this(mvs.projecting, mvs.viewWidth, mvs.viewHeight, scale, mvs.topLeft, mvs.topLeftInWindow, mvs.topLeftOnScreen);
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121 | }
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122 |
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123 | private MapViewState(JComponent position, MapViewState mvs) {
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124 | this(mvs.projecting, position.getWidth(), position.getHeight(), mvs.scale, mvs.topLeft,
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125 | findTopLeftInWindow(position), findTopLeftOnScreen(position));
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126 | }
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127 |
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128 | private MapViewState(Projecting projecting, MapViewState mvs) {
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129 | this(projecting, mvs.viewWidth, mvs.viewHeight, mvs.scale, mvs.topLeft, mvs.topLeftInWindow, mvs.topLeftOnScreen);
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130 | }
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131 |
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132 | private static Point findTopLeftInWindow(JComponent position) {
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133 | Point result = new Point();
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134 | // better than using swing utils, since this allows us to use the method if no screen is present.
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135 | Container component = position;
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136 | while (component != null) {
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137 | result.x += component.getX();
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138 | result.y += component.getY();
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139 | component = component.getParent();
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140 | }
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141 | return result;
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142 | }
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143 |
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144 | private static Point findTopLeftOnScreen(JComponent position) {
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145 | try {
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146 | return position.getLocationOnScreen();
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147 | } catch (RuntimeException e) {
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148 | throw BugReport.intercept(e).put("position", position).put("parent", position::getParent);
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149 | }
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150 | }
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151 |
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152 | /**
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153 | * The scale in east/north units per pixel.
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154 | * @return The scale.
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155 | */
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156 | public double getScale() {
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157 | return scale;
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158 | }
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159 |
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160 | /**
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161 | * Gets the MapViewPoint representation for a position in view coordinates.
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162 | * @param x The x coordinate inside the view.
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163 | * @param y The y coordinate inside the view.
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164 | * @return The MapViewPoint.
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165 | */
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166 | public MapViewPoint getForView(double x, double y) {
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167 | return new MapViewViewPoint(x, y);
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168 | }
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169 |
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170 | /**
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171 | * Gets the {@link MapViewPoint} for the given {@link EastNorth} coordinate.
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172 | * @param eastNorth the position.
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173 | * @return The point for that position.
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174 | */
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175 | public MapViewPoint getPointFor(EastNorth eastNorth) {
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176 | return new MapViewEastNorthPoint(eastNorth);
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177 | }
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178 |
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179 | /**
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180 | * Gets the {@link MapViewPoint} for the given {@link LatLon} coordinate.
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181 | * @param latlon the position
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182 | * @return The point for that position.
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183 | * @since 10651
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184 | */
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185 | public MapViewPoint getPointFor(LatLon latlon) {
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186 | return getPointFor(getProjection().latlon2eastNorth(latlon));
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187 | }
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188 |
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189 | /**
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190 | * Gets the {@link MapViewPoint} for the given node. This is faster than {@link #getPointFor(LatLon)} because it uses the node east/north
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191 | * cache.
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192 | * @param node The node
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193 | * @return The position of that node.
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194 | * @since 10827
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195 | */
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196 | public MapViewPoint getPointFor(Node node) {
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197 | try {
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198 | return getPointFor(node.getEastNorth(getProjection()));
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199 | } catch (RuntimeException e) {
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200 | throw BugReport.intercept(e).put("node", node);
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201 | }
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202 | }
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203 |
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204 | /**
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205 | * Gets a rectangle representing the whole view area.
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206 | * @return The rectangle.
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207 | */
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208 | public MapViewRectangle getViewArea() {
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209 | return getForView(0, 0).rectTo(getForView(viewWidth, viewHeight));
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210 | }
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211 |
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212 | /**
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213 | * Gets a rectangle of the view as map view area.
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214 | * @param rectangle The rectangle to get.
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215 | * @return The view area.
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216 | * @since 10827
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217 | */
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218 | public MapViewRectangle getViewArea(Rectangle2D rectangle) {
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219 | return getForView(rectangle.getMinX(), rectangle.getMinY()).rectTo(getForView(rectangle.getMaxX(), rectangle.getMaxY()));
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220 | }
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221 |
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222 | /**
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223 | * Gets the center of the view.
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224 | * @return The center position.
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225 | */
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226 | public MapViewPoint getCenter() {
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227 | return getForView(viewWidth / 2.0, viewHeight / 2.0);
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228 | }
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229 |
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230 | /**
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231 | * Gets the center of the view, rounded to a pixel coordinate
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232 | * @return The center position.
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233 | * @since 10856
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234 | */
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235 | public MapViewPoint getCenterAtPixel() {
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236 | return getForView(viewWidth / 2, viewHeight / 2);
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237 | }
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238 |
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239 | /**
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240 | * Gets the width of the view on the Screen;
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241 | * @return The width of the view component in screen pixel.
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242 | */
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243 | public double getViewWidth() {
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244 | return viewWidth;
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245 | }
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246 |
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247 | /**
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248 | * Gets the height of the view on the Screen;
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249 | * @return The height of the view component in screen pixel.
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250 | */
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251 | public double getViewHeight() {
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252 | return viewHeight;
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253 | }
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254 |
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255 | /**
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256 | * Gets the current projection used for the MapView.
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257 | * @return The projection.
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258 | */
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259 | public Projection getProjection() {
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260 | return projecting.getBaseProjection();
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261 | }
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262 |
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263 | /**
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264 | * Creates an affine transform that is used to convert the east/north coordinates to view coordinates.
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265 | * @return The affine transform. It should not be changed.
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266 | * @since 10375
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267 | */
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268 | public AffineTransform getAffineTransform() {
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269 | return new AffineTransform(1.0 / scale, 0.0, 0.0, -1.0 / scale, -topLeft.east() / scale,
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270 | topLeft.north() / scale);
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271 | }
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272 |
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273 | /**
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274 | * Gets a rectangle that is several pixel bigger than the view. It is used to define the view clipping.
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275 | * @return The rectangle.
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276 | */
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277 | public MapViewRectangle getViewClipRectangle() {
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278 | return getForView(-CLIP_BOUNDS, -CLIP_BOUNDS).rectTo(getForView(getViewWidth() + CLIP_BOUNDS, getViewHeight() + CLIP_BOUNDS));
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279 | }
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280 |
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281 | /**
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282 | * Returns the area for the given bounds.
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283 | * @param bounds bounds
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284 | * @return the area for the given bounds
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285 | */
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286 | public Area getArea(Bounds bounds) {
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287 | Path2D area = new Path2D.Double();
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288 | bounds.visitEdge(getProjection(), latlon -> {
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289 | MapViewPoint point = getPointFor(latlon);
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290 | if (area.getCurrentPoint() == null) {
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291 | area.moveTo(point.getInViewX(), point.getInViewY());
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292 | } else {
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293 | area.lineTo(point.getInViewX(), point.getInViewY());
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294 | }
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295 | });
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296 | area.closePath();
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297 | return new Area(area);
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298 | }
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299 |
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300 | /**
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301 | * Creates a new state that is the same as the current state except for that it is using a new center.
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302 | * @param newCenter The new center coordinate.
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303 | * @return The new state.
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304 | * @since 10375
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305 | */
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306 | public MapViewState usingCenter(EastNorth newCenter) {
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307 | return movedTo(getCenter(), newCenter);
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308 | }
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309 |
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310 | /**
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311 | * @param mapViewPoint The reference point.
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312 | * @param newEastNorthThere The east/north coordinate that should be there.
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313 | * @return The new state.
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314 | * @since 10375
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315 | */
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316 | public MapViewState movedTo(MapViewPoint mapViewPoint, EastNorth newEastNorthThere) {
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317 | EastNorth delta = newEastNorthThere.subtract(mapViewPoint.getEastNorth());
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318 | if (delta.distanceSq(0, 0) < .1e-20) {
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319 | return this;
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320 | } else {
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321 | return new MapViewState(topLeft.add(delta), this);
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322 | }
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323 | }
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324 |
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325 | /**
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326 | * Creates a new state that is the same as the current state except for that it is using a new scale.
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327 | * @param newScale The new scale to use.
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328 | * @return The new state.
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329 | * @since 10375
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330 | */
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331 | public MapViewState usingScale(double newScale) {
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332 | return new MapViewState(newScale, this);
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333 | }
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334 |
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335 | /**
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336 | * Creates a new state that is the same as the current state except for that it is using the location of the given component.
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337 | * <p>
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338 | * The view is moved so that the center is the same as the old center.
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339 | * @param positon The new location to use.
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340 | * @return The new state.
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341 | * @since 10375
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342 | */
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343 | public MapViewState usingLocation(JComponent positon) {
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344 | EastNorth center = this.getCenter().getEastNorth();
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345 | return new MapViewState(positon, this).usingCenter(center);
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346 | }
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347 |
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348 | /**
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349 | * Creates a state that uses the projection.
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350 | * @param projection The projection to use.
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351 | * @return The new state.
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352 | * @since 10486
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353 | */
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354 | public MapViewState usingProjection(Projection projection) {
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355 | if (projection.equals(this.projecting)) {
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356 | return this;
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357 | } else {
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358 | return new MapViewState(projection, this);
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359 | }
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360 | }
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361 |
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362 | /**
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363 | * Create the default {@link MapViewState} object for the given map view. The screen position won't be set so that this method can be used
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364 | * before the view was added to the hirarchy.
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365 | * @param width The view width
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366 | * @param height The view height
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367 | * @return The state
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368 | * @since 10375
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369 | */
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370 | public static MapViewState createDefaultState(int width, int height) {
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371 | Projection projection = Main.getProjection();
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372 | double scale = projection.getDefaultZoomInPPD();
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373 | MapViewState state = new MapViewState(projection, width, height, scale, new EastNorth(0, 0));
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374 | EastNorth center = calculateDefaultCenter();
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375 | return state.movedTo(state.getCenter(), center);
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376 | }
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377 |
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378 | private static EastNorth calculateDefaultCenter() {
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379 | Bounds b = Optional.ofNullable(DownloadDialog.getSavedDownloadBounds()).orElseGet(
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380 | () -> Main.getProjection().getWorldBoundsLatLon());
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381 | return Main.getProjection().latlon2eastNorth(b.getCenter());
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382 | }
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383 |
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384 | /**
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385 | * Check if this MapViewState equals another one, disregarding the position
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386 | * of the JOSM window on screen.
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387 | * @param other the other MapViewState
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388 | * @return true if the other MapViewState has the same size, scale, position and projection,
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389 | * false otherwise
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390 | */
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391 | public boolean equalsInWindow(MapViewState other) {
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392 | return other != null &&
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393 | this.viewWidth == other.viewWidth &&
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394 | this.viewHeight == other.viewHeight &&
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395 | this.scale == other.scale &&
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396 | Objects.equals(this.topLeft, other.topLeft) &&
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397 | Objects.equals(this.projecting, other.projecting);
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398 | }
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399 |
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400 | /**
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401 | * A class representing a point in the map view. It allows to convert between the different coordinate systems.
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402 | * @author Michael Zangl
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403 | */
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404 | public abstract class MapViewPoint {
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405 |
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406 | /**
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407 | * Get this point in view coordinates.
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408 | * @return The point in view coordinates.
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409 | */
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410 | public Point2D getInView() {
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411 | return new Point2D.Double(getInViewX(), getInViewY());
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412 | }
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413 |
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414 | /**
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415 | * Get the x coordinate in view space without creating an intermediate object.
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416 | * @return The x coordinate
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417 | * @since 10827
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418 | */
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419 | public abstract double getInViewX();
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420 |
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421 | /**
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422 | * Get the y coordinate in view space without creating an intermediate object.
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423 | * @return The y coordinate
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424 | * @since 10827
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425 | */
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426 | public abstract double getInViewY();
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427 |
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428 | /**
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429 | * Convert this point to window coordinates.
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430 | * @return The point in window coordinates.
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431 | */
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432 | public Point2D getInWindow() {
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433 | return getUsingCorner(topLeftInWindow);
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434 | }
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435 |
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436 | /**
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437 | * Convert this point to screen coordinates.
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438 | * @return The point in screen coordinates.
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439 | */
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440 | public Point2D getOnScreen() {
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441 | return getUsingCorner(topLeftOnScreen);
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442 | }
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443 |
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444 | private Double getUsingCorner(Point corner) {
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445 | return new Point2D.Double(corner.getX() + getInViewX(), corner.getY() + getInViewY());
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446 | }
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447 |
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448 | /**
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449 | * Gets the {@link EastNorth} coordinate of this point.
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450 | * @return The east/north coordinate.
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451 | */
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452 | public EastNorth getEastNorth() {
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453 | return new EastNorth(topLeft.east() + getInViewX() * scale, topLeft.north() - getInViewY() * scale);
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454 | }
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455 |
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456 | /**
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457 | * Create a rectangle from this to the other point.
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458 | * @param other The other point. Needs to be of the same {@link MapViewState}
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459 | * @return A rectangle.
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460 | */
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461 | public MapViewRectangle rectTo(MapViewPoint other) {
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462 | return new MapViewRectangle(this, other);
|
---|
463 | }
|
---|
464 |
|
---|
465 | /**
|
---|
466 | * Gets the current position in LatLon coordinates according to the current projection.
|
---|
467 | * @return The positon as LatLon.
|
---|
468 | * @see #getLatLonClamped()
|
---|
469 | */
|
---|
470 | public LatLon getLatLon() {
|
---|
471 | return projecting.getBaseProjection().eastNorth2latlon(getEastNorth());
|
---|
472 | }
|
---|
473 |
|
---|
474 | /**
|
---|
475 | * Gets the latlon coordinate clamped to the current world area.
|
---|
476 | * @return The lat/lon coordinate
|
---|
477 | * @since 10805
|
---|
478 | */
|
---|
479 | public LatLon getLatLonClamped() {
|
---|
480 | return projecting.eastNorth2latlonClamped(getEastNorth());
|
---|
481 | }
|
---|
482 |
|
---|
483 | /**
|
---|
484 | * Add the given offset to this point
|
---|
485 | * @param en The offset in east/north space.
|
---|
486 | * @return The new point
|
---|
487 | * @since 10651
|
---|
488 | */
|
---|
489 | public MapViewPoint add(EastNorth en) {
|
---|
490 | return new MapViewEastNorthPoint(getEastNorth().add(en));
|
---|
491 | }
|
---|
492 |
|
---|
493 | /**
|
---|
494 | * Check if this point is inside the view bounds.
|
---|
495 | *
|
---|
496 | * This is the case iff <code>getOutsideRectangleFlags(getViewArea())</code> returns no flags
|
---|
497 | * @return true if it is.
|
---|
498 | * @since 10827
|
---|
499 | */
|
---|
500 | public boolean isInView() {
|
---|
501 | return inRange(getInViewX(), 0, getViewWidth()) && inRange(getInViewY(), 0, getViewHeight());
|
---|
502 | }
|
---|
503 |
|
---|
504 | private boolean inRange(double val, int min, double max) {
|
---|
505 | return val >= min && val < max;
|
---|
506 | }
|
---|
507 |
|
---|
508 | /**
|
---|
509 | * Gets the direction in which this point is outside of the given view rectangle.
|
---|
510 | * @param rect The rectangle to check agains.
|
---|
511 | * @return The direction in which it is outside of the view, as OUTSIDE_... flags.
|
---|
512 | * @since 10827
|
---|
513 | */
|
---|
514 | public int getOutsideRectangleFlags(MapViewRectangle rect) {
|
---|
515 | Rectangle2D bounds = rect.getInView();
|
---|
516 | int flags = 0;
|
---|
517 | if (getInViewX() < bounds.getMinX()) {
|
---|
518 | flags |= OUTSIDE_LEFT;
|
---|
519 | } else if (getInViewX() > bounds.getMaxX()) {
|
---|
520 | flags |= OUTSIDE_RIGHT;
|
---|
521 | }
|
---|
522 | if (getInViewY() < bounds.getMinY()) {
|
---|
523 | flags |= OUTSIDE_TOP;
|
---|
524 | } else if (getInViewY() > bounds.getMaxY()) {
|
---|
525 | flags |= OUTSIDE_BOTTOM;
|
---|
526 | }
|
---|
527 |
|
---|
528 | return flags;
|
---|
529 | }
|
---|
530 |
|
---|
531 | /**
|
---|
532 | * Gets the sum of the x/y view distances between the points. |x1 - x2| + |y1 - y2|
|
---|
533 | * @param p2 The other point
|
---|
534 | * @return The norm
|
---|
535 | * @since 10827
|
---|
536 | */
|
---|
537 | public double oneNormInView(MapViewPoint p2) {
|
---|
538 | return Math.abs(getInViewX() - p2.getInViewX()) + Math.abs(getInViewY() - p2.getInViewY());
|
---|
539 | }
|
---|
540 |
|
---|
541 | /**
|
---|
542 | * Gets the squared distance between this point and an other point.
|
---|
543 | * @param p2 The other point
|
---|
544 | * @return The squared distance.
|
---|
545 | * @since 10827
|
---|
546 | */
|
---|
547 | public double distanceToInViewSq(MapViewPoint p2) {
|
---|
548 | double dx = getInViewX() - p2.getInViewX();
|
---|
549 | double dy = getInViewY() - p2.getInViewY();
|
---|
550 | return dx * dx + dy * dy;
|
---|
551 | }
|
---|
552 |
|
---|
553 | /**
|
---|
554 | * Gets the distance between this point and an other point.
|
---|
555 | * @param p2 The other point
|
---|
556 | * @return The distance.
|
---|
557 | * @since 10827
|
---|
558 | */
|
---|
559 | public double distanceToInView(MapViewPoint p2) {
|
---|
560 | return Math.sqrt(distanceToInViewSq(p2));
|
---|
561 | }
|
---|
562 |
|
---|
563 | /**
|
---|
564 | * Do a linear interpolation to the other point
|
---|
565 | * @param p1 The other point
|
---|
566 | * @param i The interpolation factor. 0 is at the current point, 1 at the other point.
|
---|
567 | * @return The new point
|
---|
568 | * @since 10874
|
---|
569 | */
|
---|
570 | public MapViewPoint interpolate(MapViewPoint p1, double i) {
|
---|
571 | return new MapViewViewPoint((1 - i) * getInViewX() + i * p1.getInViewX(), (1 - i) * getInViewY() + i * p1.getInViewY());
|
---|
572 | }
|
---|
573 | }
|
---|
574 |
|
---|
575 | private class MapViewViewPoint extends MapViewPoint {
|
---|
576 | private final double x;
|
---|
577 | private final double y;
|
---|
578 |
|
---|
579 | MapViewViewPoint(double x, double y) {
|
---|
580 | this.x = x;
|
---|
581 | this.y = y;
|
---|
582 | }
|
---|
583 |
|
---|
584 | @Override
|
---|
585 | public double getInViewX() {
|
---|
586 | return x;
|
---|
587 | }
|
---|
588 |
|
---|
589 | @Override
|
---|
590 | public double getInViewY() {
|
---|
591 | return y;
|
---|
592 | }
|
---|
593 |
|
---|
594 | @Override
|
---|
595 | public String toString() {
|
---|
596 | return "MapViewViewPoint [x=" + x + ", y=" + y + ']';
|
---|
597 | }
|
---|
598 | }
|
---|
599 |
|
---|
600 | private class MapViewEastNorthPoint extends MapViewPoint {
|
---|
601 |
|
---|
602 | private final EastNorth eastNorth;
|
---|
603 |
|
---|
604 | MapViewEastNorthPoint(EastNorth eastNorth) {
|
---|
605 | this.eastNorth = Objects.requireNonNull(eastNorth, "eastNorth");
|
---|
606 | }
|
---|
607 |
|
---|
608 | @Override
|
---|
609 | public double getInViewX() {
|
---|
610 | return (eastNorth.east() - topLeft.east()) / scale;
|
---|
611 | }
|
---|
612 |
|
---|
613 | @Override
|
---|
614 | public double getInViewY() {
|
---|
615 | return (topLeft.north() - eastNorth.north()) / scale;
|
---|
616 | }
|
---|
617 |
|
---|
618 | @Override
|
---|
619 | public EastNorth getEastNorth() {
|
---|
620 | return eastNorth;
|
---|
621 | }
|
---|
622 |
|
---|
623 | @Override
|
---|
624 | public String toString() {
|
---|
625 | return "MapViewEastNorthPoint [eastNorth=" + eastNorth + ']';
|
---|
626 | }
|
---|
627 | }
|
---|
628 |
|
---|
629 | /**
|
---|
630 | * A rectangle on the MapView. It is rectangular in screen / EastNorth space.
|
---|
631 | * @author Michael Zangl
|
---|
632 | */
|
---|
633 | public class MapViewRectangle {
|
---|
634 | private final MapViewPoint p1;
|
---|
635 | private final MapViewPoint p2;
|
---|
636 |
|
---|
637 | /**
|
---|
638 | * Create a new MapViewRectangle
|
---|
639 | * @param p1 The first point to use
|
---|
640 | * @param p2 The second point to use.
|
---|
641 | */
|
---|
642 | MapViewRectangle(MapViewPoint p1, MapViewPoint p2) {
|
---|
643 | this.p1 = p1;
|
---|
644 | this.p2 = p2;
|
---|
645 | }
|
---|
646 |
|
---|
647 | /**
|
---|
648 | * Gets the projection bounds for this rectangle.
|
---|
649 | * @return The projection bounds.
|
---|
650 | */
|
---|
651 | public ProjectionBounds getProjectionBounds() {
|
---|
652 | ProjectionBounds b = new ProjectionBounds(p1.getEastNorth());
|
---|
653 | b.extend(p2.getEastNorth());
|
---|
654 | return b;
|
---|
655 | }
|
---|
656 |
|
---|
657 | /**
|
---|
658 | * Gets a rough estimate of the bounds by assuming lat/lon are parallel to x/y.
|
---|
659 | * @return The bounds computed by converting the corners of this rectangle.
|
---|
660 | * @see #getLatLonBoundsBox()
|
---|
661 | */
|
---|
662 | public Bounds getCornerBounds() {
|
---|
663 | Bounds b = new Bounds(p1.getLatLon());
|
---|
664 | b.extend(p2.getLatLon());
|
---|
665 | return b;
|
---|
666 | }
|
---|
667 |
|
---|
668 | /**
|
---|
669 | * Gets the real bounds that enclose this rectangle.
|
---|
670 | * This is computed respecting that the borders of this rectangle may not be a straignt line in latlon coordinates.
|
---|
671 | * @return The bounds.
|
---|
672 | * @since 10458
|
---|
673 | */
|
---|
674 | public Bounds getLatLonBoundsBox() {
|
---|
675 | // TODO @michael2402: Use hillclimb.
|
---|
676 | return projecting.getBaseProjection().getLatLonBoundsBox(getProjectionBounds());
|
---|
677 | }
|
---|
678 |
|
---|
679 | /**
|
---|
680 | * Gets this rectangle on the screen.
|
---|
681 | * @return The rectangle.
|
---|
682 | * @since 10651
|
---|
683 | */
|
---|
684 | public Rectangle2D getInView() {
|
---|
685 | double x1 = p1.getInViewX();
|
---|
686 | double y1 = p1.getInViewY();
|
---|
687 | double x2 = p2.getInViewX();
|
---|
688 | double y2 = p2.getInViewY();
|
---|
689 | return new Rectangle2D.Double(Math.min(x1, x2), Math.min(y1, y2), Math.abs(x1 - x2), Math.abs(y1 - y2));
|
---|
690 | }
|
---|
691 |
|
---|
692 | /**
|
---|
693 | * Check if the rectangle intersects the map view area.
|
---|
694 | * @return <code>true</code> if it intersects.
|
---|
695 | * @since 10827
|
---|
696 | */
|
---|
697 | public boolean isInView() {
|
---|
698 | return getInView().intersects(getViewArea().getInView());
|
---|
699 | }
|
---|
700 |
|
---|
701 | /**
|
---|
702 | * Gets the entry point at which a line between start and end enters the current view.
|
---|
703 | * @param start The start
|
---|
704 | * @param end The end
|
---|
705 | * @return The entry point or <code>null</code> if the line does not intersect this view.
|
---|
706 | */
|
---|
707 | public MapViewPoint getLineEntry(MapViewPoint start, MapViewPoint end) {
|
---|
708 | ProjectionBounds bounds = getProjectionBounds();
|
---|
709 | if (bounds.contains(start.getEastNorth())) {
|
---|
710 | return start;
|
---|
711 | }
|
---|
712 |
|
---|
713 | double dx = end.getEastNorth().east() - start.getEastNorth().east();
|
---|
714 | double boundX = dx > 0 ? bounds.minEast : bounds.maxEast;
|
---|
715 | EastNorth borderIntersection = Geometry.getSegmentSegmentIntersection(start.getEastNorth(), end.getEastNorth(),
|
---|
716 | new EastNorth(boundX, bounds.minNorth),
|
---|
717 | new EastNorth(boundX, bounds.maxNorth));
|
---|
718 | if (borderIntersection != null) {
|
---|
719 | return getPointFor(borderIntersection);
|
---|
720 | }
|
---|
721 |
|
---|
722 | double dy = end.getEastNorth().north() - start.getEastNorth().north();
|
---|
723 | double boundY = dy > 0 ? bounds.minNorth : bounds.maxNorth;
|
---|
724 | borderIntersection = Geometry.getSegmentSegmentIntersection(start.getEastNorth(), end.getEastNorth(),
|
---|
725 | new EastNorth(bounds.minEast, boundY),
|
---|
726 | new EastNorth(bounds.maxEast, boundY));
|
---|
727 | if (borderIntersection != null) {
|
---|
728 | return getPointFor(borderIntersection);
|
---|
729 | }
|
---|
730 |
|
---|
731 | return null;
|
---|
732 | }
|
---|
733 | }
|
---|
734 |
|
---|
735 | }
|
---|