1 | // License: GPL. For details, see LICENSE file.
|
---|
2 | package org.openstreetmap.josm.data.osm.visitor;
|
---|
3 |
|
---|
4 | import java.util.Collection;
|
---|
5 |
|
---|
6 | import org.openstreetmap.josm.Main;
|
---|
7 | import org.openstreetmap.josm.data.Bounds;
|
---|
8 | import org.openstreetmap.josm.data.ProjectionBounds;
|
---|
9 | import org.openstreetmap.josm.data.coor.CachedLatLon;
|
---|
10 | import org.openstreetmap.josm.data.coor.EastNorth;
|
---|
11 | import org.openstreetmap.josm.data.coor.LatLon;
|
---|
12 | import org.openstreetmap.josm.data.osm.Node;
|
---|
13 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
|
---|
14 | import org.openstreetmap.josm.data.osm.Relation;
|
---|
15 | import org.openstreetmap.josm.data.osm.RelationMember;
|
---|
16 | import org.openstreetmap.josm.data.osm.Way;
|
---|
17 |
|
---|
18 | /**
|
---|
19 | * Calculates the total bounding rectangle of a series of {@link OsmPrimitive} objects, using the
|
---|
20 | * EastNorth values as reference.
|
---|
21 | * @author imi
|
---|
22 | */
|
---|
23 | public class BoundingXYVisitor extends AbstractVisitor {
|
---|
24 |
|
---|
25 | private ProjectionBounds bounds;
|
---|
26 |
|
---|
27 | @Override
|
---|
28 | public void visit(Node n) {
|
---|
29 | visit(n.getEastNorth());
|
---|
30 | }
|
---|
31 |
|
---|
32 | @Override
|
---|
33 | public void visit(Way w) {
|
---|
34 | if (w.isIncomplete()) return;
|
---|
35 | for (Node n : w.getNodes()) {
|
---|
36 | visit(n);
|
---|
37 | }
|
---|
38 | }
|
---|
39 |
|
---|
40 | @Override
|
---|
41 | public void visit(Relation e) {
|
---|
42 | // only use direct members
|
---|
43 | for (RelationMember m : e.getMembers()) {
|
---|
44 | if (!m.isRelation()) {
|
---|
45 | m.getMember().accept(this);
|
---|
46 | }
|
---|
47 | }
|
---|
48 | }
|
---|
49 |
|
---|
50 | public void visit(Bounds b) {
|
---|
51 | if (b != null) {
|
---|
52 | visit(b.getMin());
|
---|
53 | visit(b.getMax());
|
---|
54 | }
|
---|
55 | }
|
---|
56 |
|
---|
57 | public void visit(ProjectionBounds b) {
|
---|
58 | if (b != null) {
|
---|
59 | visit(b.getMin());
|
---|
60 | visit(b.getMax());
|
---|
61 | }
|
---|
62 | }
|
---|
63 |
|
---|
64 | public void visit(LatLon latlon) {
|
---|
65 | if (latlon != null) {
|
---|
66 | if (latlon instanceof CachedLatLon) {
|
---|
67 | visit(((CachedLatLon) latlon).getEastNorth());
|
---|
68 | } else {
|
---|
69 | visit(Main.getProjection().latlon2eastNorth(latlon));
|
---|
70 | }
|
---|
71 | }
|
---|
72 | }
|
---|
73 |
|
---|
74 | public void visit(EastNorth eastNorth) {
|
---|
75 | if (eastNorth != null) {
|
---|
76 | if (bounds == null) {
|
---|
77 | bounds = new ProjectionBounds(eastNorth);
|
---|
78 | } else {
|
---|
79 | bounds.extend(eastNorth);
|
---|
80 | }
|
---|
81 | }
|
---|
82 | }
|
---|
83 |
|
---|
84 | public boolean hasExtend() {
|
---|
85 | return bounds != null && bounds.hasExtend();
|
---|
86 | }
|
---|
87 |
|
---|
88 | /**
|
---|
89 | * @return The bounding box or <code>null</code> if no coordinates have passed
|
---|
90 | */
|
---|
91 | public ProjectionBounds getBounds() {
|
---|
92 | return bounds;
|
---|
93 | }
|
---|
94 |
|
---|
95 | /**
|
---|
96 | * Enlarges the calculated bounding box by 0.002 degrees.
|
---|
97 | * If the bounding box has not been set (<code>min</code> or <code>max</code>
|
---|
98 | * equal <code>null</code>) this method does not do anything.
|
---|
99 | */
|
---|
100 | public void enlargeBoundingBox() {
|
---|
101 | enlargeBoundingBox(Main.pref.getDouble("edit.zoom-enlarge-bbox", 0.002));
|
---|
102 | }
|
---|
103 |
|
---|
104 | /**
|
---|
105 | * Enlarges the calculated bounding box by the specified number of degrees.
|
---|
106 | * If the bounding box has not been set (<code>min</code> or <code>max</code>
|
---|
107 | * equal <code>null</code>) this method does not do anything.
|
---|
108 | *
|
---|
109 | * @param enlargeDegree number of degrees to enlarge on each side
|
---|
110 | */
|
---|
111 | public void enlargeBoundingBox(double enlargeDegree) {
|
---|
112 | if (bounds == null)
|
---|
113 | return;
|
---|
114 | LatLon minLatlon = Main.getProjection().eastNorth2latlon(bounds.getMin());
|
---|
115 | LatLon maxLatlon = Main.getProjection().eastNorth2latlon(bounds.getMax());
|
---|
116 | bounds = new ProjectionBounds(
|
---|
117 | Main.getProjection().latlon2eastNorth(new LatLon(minLatlon.lat() - enlargeDegree, minLatlon.lon() - enlargeDegree)),
|
---|
118 | Main.getProjection().latlon2eastNorth(new LatLon(maxLatlon.lat() + enlargeDegree, maxLatlon.lon() + enlargeDegree)));
|
---|
119 | }
|
---|
120 |
|
---|
121 | /**
|
---|
122 | * Enlarges the bounding box up to <code>maxEnlargePercent</code>, depending on
|
---|
123 | * its size. If the bounding box is small, it will be enlarged more in relation
|
---|
124 | * to its beginning size. The larger the bounding box, the smaller the change,
|
---|
125 | * down to the minimum of 1% enlargement.
|
---|
126 | *
|
---|
127 | * Warning: if the bounding box only contains a single node, no expansion takes
|
---|
128 | * place because a node has no width/height. Use <code>enlargeToMinDegrees</code>
|
---|
129 | * instead.
|
---|
130 | *
|
---|
131 | * Example: You specify enlargement to be up to 100%.
|
---|
132 | *
|
---|
133 | * Bounding box is a small house: enlargement will be 95–100%, i.e.
|
---|
134 | * making enough space so that the house fits twice on the screen in
|
---|
135 | * each direction.
|
---|
136 | *
|
---|
137 | * Bounding box is a large landuse, like a forest: Enlargement will
|
---|
138 | * be 1–10%, i.e. just add a little border around the landuse.
|
---|
139 | *
|
---|
140 | * If the bounding box has not been set (<code>min</code> or <code>max</code>
|
---|
141 | * equal <code>null</code>) this method does not do anything.
|
---|
142 | *
|
---|
143 | * @param maxEnlargePercent maximum enlargement in percentage (100.0 for 100%)
|
---|
144 | */
|
---|
145 | public void enlargeBoundingBoxLogarithmically(double maxEnlargePercent) {
|
---|
146 | if (bounds == null)
|
---|
147 | return;
|
---|
148 |
|
---|
149 | double diffEast = bounds.getMax().east() - bounds.getMin().east();
|
---|
150 | double diffNorth = bounds.getMax().north() - bounds.getMin().north();
|
---|
151 |
|
---|
152 | double enlargeEast = Math.min(maxEnlargePercent - 10*Math.log(diffEast), 1)/100;
|
---|
153 | double enlargeNorth = Math.min(maxEnlargePercent - 10*Math.log(diffNorth), 1)/100;
|
---|
154 |
|
---|
155 | visit(bounds.getMin().add(-enlargeEast/2, -enlargeNorth/2));
|
---|
156 | visit(bounds.getMax().add(+enlargeEast/2, +enlargeNorth/2));
|
---|
157 | }
|
---|
158 |
|
---|
159 | /**
|
---|
160 | * Specify a degree larger than 0 in order to make the bounding box at least
|
---|
161 | * the specified size in width and height. The value is ignored if the
|
---|
162 | * bounding box is already larger than the specified amount.
|
---|
163 | *
|
---|
164 | * If the bounding box has not been set (<code>min</code> or <code>max</code>
|
---|
165 | * equal <code>null</code>) this method does not do anything.
|
---|
166 | *
|
---|
167 | * If the bounding box contains objects and is to be enlarged, the objects
|
---|
168 | * will be centered within the new bounding box.
|
---|
169 | *
|
---|
170 | * @param size minimum width and height in meter
|
---|
171 | */
|
---|
172 | public void enlargeToMinSize(double size) {
|
---|
173 | if (bounds == null)
|
---|
174 | return;
|
---|
175 | // convert size from meters to east/north units
|
---|
176 | double en_size = size * Main.map.mapView.getScale() / Main.map.mapView.getDist100Pixel() * 100;
|
---|
177 | visit(bounds.getMin().add(-en_size/2, -en_size/2));
|
---|
178 | visit(bounds.getMax().add(+en_size/2, +en_size/2));
|
---|
179 | }
|
---|
180 |
|
---|
181 | @Override
|
---|
182 | public String toString() {
|
---|
183 | return "BoundingXYVisitor["+bounds+']';
|
---|
184 | }
|
---|
185 |
|
---|
186 | public void computeBoundingBox(Collection<? extends OsmPrimitive> primitives) {
|
---|
187 | if (primitives == null) return;
|
---|
188 | for (OsmPrimitive p: primitives) {
|
---|
189 | if (p == null) {
|
---|
190 | continue;
|
---|
191 | }
|
---|
192 | p.accept(this);
|
---|
193 | }
|
---|
194 | }
|
---|
195 | }
|
---|