source: josm/src/org/openstreetmap/josm/gui/download/WorldChooser.java@ 242

Last change on this file since 242 was 242, checked in by imi, 18 years ago
  • fixed many java warnings
  • changed eclipse settings to use JUnit library instead of (deprecated) environment variable
File size: 5.1 KB
Line 
1package org.openstreetmap.josm.gui.download;
2
3import static org.openstreetmap.josm.tools.I18n.tr;
4
5import java.awt.BorderLayout;
6import java.awt.Color;
7import java.awt.Dimension;
8import java.awt.Graphics;
9import java.awt.Point;
10import java.awt.Rectangle;
11import java.beans.PropertyChangeListener;
12import java.net.URL;
13
14import javax.swing.ImageIcon;
15import javax.swing.JLabel;
16import javax.swing.JPanel;
17
18import org.openstreetmap.josm.Main;
19import org.openstreetmap.josm.data.coor.EastNorth;
20import org.openstreetmap.josm.data.coor.LatLon;
21import org.openstreetmap.josm.data.projection.Projection;
22import org.openstreetmap.josm.gui.MapMover;
23import org.openstreetmap.josm.gui.MapScaler;
24import org.openstreetmap.josm.gui.NavigatableComponent;
25import org.openstreetmap.josm.gui.SelectionManager;
26import org.openstreetmap.josm.gui.SelectionManager.SelectionEnded;
27
28
29/**
30 * A component that let the user select a lat/lon bounding box from zooming
31 * into the world as a picture and selecting a region.
32 *
33 * The component has to be of the aspect ration 2:1 to look good.
34 *
35 * @author imi
36 */
37public class WorldChooser extends NavigatableComponent implements DownloadSelection {
38
39 /**
40 * The world as picture.
41 */
42 private ImageIcon world;
43
44 /**
45 * Maximum scale level
46 */
47 private double scaleMax;
48
49 /**
50 * Mark this rectangle (lat/lon values) when painting.
51 */
52 private EastNorth markerMin, markerMax;
53
54 private Projection projection;
55
56 /**
57 * Create the chooser component.
58 */
59 public WorldChooser() {
60 URL path = Main.class.getResource("/images/world.jpg");
61 world = new ImageIcon(path);
62 center = new EastNorth(world.getIconWidth()/2, world.getIconHeight()/2);
63 setPreferredSize(new Dimension(400, 200));
64
65 projection = new Projection() {
66 public EastNorth latlon2eastNorth(LatLon p) {
67 return new EastNorth(
68 (p.lon()+180) / 360 * world.getIconWidth(),
69 (p.lat()+90) / 180 * world.getIconHeight());
70 }
71 public LatLon eastNorth2latlon(EastNorth p) {
72 return new LatLon(
73 p.north()*180/world.getIconHeight() - 90,
74 p.east()*360/world.getIconWidth() - 180);
75 }
76 @Override public String toString() {
77 return "WorldChooser";
78 }
79 public String getCacheDirectoryName() {
80 throw new UnsupportedOperationException();
81 }
82 public double scaleFactor() {
83 return 1.0 / world.getIconWidth();
84 }
85
86 };
87
88 MapScaler scaler = new MapScaler(this, projection);
89 add(scaler);
90 scaler.setLocation(10,10);
91
92 setMinimumSize(new Dimension(350, 350/2));
93 }
94
95 public void addGui(final DownloadDialog gui) {
96 JPanel temp = new JPanel();
97 temp.setLayout(new BorderLayout());
98 temp.add(this, BorderLayout.CENTER);
99 temp.add(new JLabel(tr("You can use the mouse or Ctrl+Arrow keys/./, to zoom and pan.")), BorderLayout.SOUTH);
100 gui.tabpane.add(temp, "Map");
101 new MapMover(this, temp);
102 SelectionEnded selListener = new SelectionEnded(){
103 public void selectionEnded(Rectangle r, boolean alt, boolean shift, boolean ctrl) {
104 markerMin = getEastNorth(r.x, r.y+r.height);
105 markerMax = getEastNorth(r.x+r.width, r.y);
106 LatLon min = getProjection().eastNorth2latlon(markerMin);
107 LatLon max = getProjection().eastNorth2latlon(markerMax);
108 gui.minlat = min.lat();
109 gui.minlon = min.lon();
110 gui.maxlat = max.lat();
111 gui.maxlon = max.lon();
112 gui.boundingBoxChanged(WorldChooser.this);
113 repaint();
114 }
115 public void addPropertyChangeListener(PropertyChangeListener listener) {}
116 public void removePropertyChangeListener(PropertyChangeListener listener) {}
117 };
118 SelectionManager sm = new SelectionManager(selListener, false, this);
119 sm.register(this);
120 }
121
122 public void boundingBoxChanged(DownloadDialog gui) {
123 markerMin = getProjection().latlon2eastNorth(new LatLon(gui.minlat, gui.minlon));
124 markerMax = getProjection().latlon2eastNorth(new LatLon(gui.maxlat, gui.maxlon));
125 repaint();
126 }
127
128 /**
129 * Set the scale as well as the preferred size.
130 */
131 @Override public void setPreferredSize(Dimension preferredSize) {
132 super.setPreferredSize(preferredSize);
133 scale = world.getIconWidth()/preferredSize.getWidth();
134 scaleMax = scale;
135 }
136
137 /**
138 * Draw the current selected region.
139 */
140 @Override public void paint(Graphics g) {
141 EastNorth tl = getEastNorth(0,0);
142 EastNorth br = getEastNorth(getWidth(),getHeight());
143 g.drawImage(world.getImage(),0,0,getWidth(),getHeight(),(int)tl.east(),(int)tl.north(),(int)br.east(),(int)br.north(), null);
144
145 // draw marker rect
146 if (markerMin != null && markerMax != null) {
147 Point p1 = getPoint(markerMin);
148 Point p2 = getPoint(markerMax);
149 double x = Math.min(p1.x, p2.x);
150 double y = Math.min(p1.y, p2.y);
151 double w = Math.max(p1.x, p2.x) - x;
152 double h = Math.max(p1.y, p2.y) - y;
153 if (w < 1)
154 w = 1;
155 if (h < 1)
156 h = 1;
157 g.setColor(Color.YELLOW);
158 g.drawRect((int)x, (int)y, (int)w, (int)h);
159 }
160 super.paint(g);
161 }
162
163 @Override public void zoomTo(EastNorth newCenter, double scale) {
164 if (getWidth() != 0 && scale > scaleMax) {
165 scale = scaleMax;
166 newCenter = center;
167 }
168 super.zoomTo(newCenter, scale);
169 }
170
171 /**
172 * Always use our image projection mode.
173 */
174 @Override protected Projection getProjection() {
175 return projection;
176 }
177}
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