001    // License: GPL. Copyright 2007 by Immanuel Scholz and others
002    package org.openstreetmap.josm.actions;
003    
004    import static org.openstreetmap.josm.tools.I18n.tr;
005    
006    import java.awt.BorderLayout;
007    import java.awt.GridBagLayout;
008    import java.awt.event.ActionEvent;
009    import java.awt.event.KeyEvent;
010    import java.awt.event.MouseEvent;
011    import java.awt.event.MouseListener;
012    
013    import javax.swing.JLabel;
014    import javax.swing.JOptionPane;
015    import javax.swing.JPanel;
016    import javax.swing.JTextField;
017    import javax.swing.event.DocumentEvent;
018    import javax.swing.event.DocumentListener;
019    
020    import org.openstreetmap.josm.Main;
021    import org.openstreetmap.josm.actions.JosmAction;
022    import org.openstreetmap.josm.data.Bounds;
023    import org.openstreetmap.josm.data.coor.LatLon;
024    import org.openstreetmap.josm.gui.MapView;
025    import org.openstreetmap.josm.tools.GBC;
026    import org.openstreetmap.josm.tools.OsmUrlToBounds;
027    import org.openstreetmap.josm.tools.Shortcut;
028    
029    public class JumpToAction extends JosmAction implements MouseListener {
030        public JumpToAction() {
031            super(tr("Jump To Position"), null, tr("Opens a dialog that allows to jump to a specific location"), Shortcut.registerShortcut("tools:jumpto", tr("Tool: {0}", tr("Jump To Position")),
032            KeyEvent.VK_J, Shortcut.CTRL), false);
033            putValue("toolbar", "action/jumpto");
034            Main.toolbar.register(this);
035        }
036    
037        private JTextField url = new JTextField();
038        private JTextField lat = new JTextField();
039        private JTextField lon = new JTextField();
040        private JTextField zm = new JTextField();
041    
042        private double zoomFactor = 0;
043        public void showJumpToDialog() {
044            MapView mv = Main.map.mapView;
045            if(mv == null)
046                return;
047            LatLon curPos=mv.getProjection().eastNorth2latlon(mv.getCenter());
048            lat.setText(java.lang.Double.toString(curPos.lat()));
049            lon.setText(java.lang.Double.toString(curPos.lon()));
050    
051            double dist = mv.getDist100Pixel();
052            zoomFactor = 1/dist;
053    
054            zm.setText(java.lang.Long.toString(Math.round(dist*100)/100));
055            updateUrl(true);
056    
057            JPanel panel = new JPanel(new BorderLayout());
058            panel.add(new JLabel("<html>"
059                                  + tr("Enter Lat/Lon to jump to position.")
060                                  + "<br>"
061                                  + tr("You can also paste an URL from www.openstreetmap.org")
062                                  + "<br>"
063                                  + "</html>"),
064                      BorderLayout.NORTH);
065    
066            class osmURLListener implements DocumentListener {
067                public void changedUpdate(DocumentEvent e) { parseURL(); }
068                public void insertUpdate(DocumentEvent e) { parseURL(); }
069                public void removeUpdate(DocumentEvent e) { parseURL(); }
070            }
071    
072            class osmLonLatListener implements DocumentListener {
073                public void changedUpdate(DocumentEvent e) { updateUrl(false); }
074                public void insertUpdate(DocumentEvent e) { updateUrl(false); }
075                public void removeUpdate(DocumentEvent e) { updateUrl(false); }
076            }
077    
078            osmLonLatListener x=new osmLonLatListener();
079            lat.getDocument().addDocumentListener(x);
080            lon.getDocument().addDocumentListener(x);
081            zm.getDocument().addDocumentListener(x);
082            url.getDocument().addDocumentListener(new osmURLListener());
083    
084            JPanel p = new JPanel(new GridBagLayout());
085            panel.add(p, BorderLayout.NORTH);
086    
087            p.add(new JLabel(tr("Latitude")), GBC.eol());
088            p.add(lat, GBC.eol().fill(GBC.HORIZONTAL));
089    
090            p.add(new JLabel(tr("Longitude")), GBC.eol());
091            p.add(lon, GBC.eol().fill(GBC.HORIZONTAL));
092    
093            p.add(new JLabel(tr("Zoom (in metres)")), GBC.eol());
094            p.add(zm, GBC.eol().fill(GBC.HORIZONTAL));
095    
096            p.add(new JLabel(tr("URL")), GBC.eol());
097            p.add(url, GBC.eol().fill(GBC.HORIZONTAL));
098    
099            Object[] buttons = { tr("Jump there"), tr("Cancel") };
100            LatLon ll = null;
101            double zoomLvl = 100;
102            while(ll == null) {
103                int option = JOptionPane.showOptionDialog(
104                                Main.parent,
105                                panel,
106                                tr("Jump to Position"),
107                                JOptionPane.OK_CANCEL_OPTION,
108                                JOptionPane.PLAIN_MESSAGE,
109                                null,
110                                buttons,
111                                buttons[0]);
112    
113                if (option != JOptionPane.OK_OPTION) return;
114                try {
115                    zoomLvl = Double.parseDouble(zm.getText());
116                    ll = new LatLon(Double.parseDouble(lat.getText()), Double.parseDouble(lon.getText()));
117                } catch (Exception ex) {
118                    JOptionPane.showMessageDialog(Main.parent, tr("Could not parse Latitude, Longitude or Zoom. Please check."), tr("Unable to parse Lon/Lat"), JOptionPane.ERROR_MESSAGE);
119                }
120            }
121    
122            mv.zoomToFactor(mv.getProjection().latlon2eastNorth(ll), zoomFactor * zoomLvl);
123        }
124    
125        private void parseURL() {
126            if(!url.hasFocus()) return;
127            Bounds b = OsmUrlToBounds.parse(url.getText());
128            if (b != null) {
129                lat.setText(Double.toString((b.getMin().lat() + b.getMax().lat())/2));
130                lon.setText(Double.toString((b.getMin().lon() + b.getMax().lon())/2));
131    
132                int zoomLvl = 16;
133                String[] args = url.getText().substring(url.getText().indexOf('?')+1).split("&");
134                for (String arg : args) {
135                    int eq = arg.indexOf('=');
136                    if (eq == -1 || !arg.substring(0, eq).equalsIgnoreCase("zoom")) continue;
137    
138                    zoomLvl = Integer.parseInt(arg.substring(eq + 1));
139                    break;
140                }
141    
142                // 10 000 000 = 10 000 * 1000 = World * (km -> m)
143                zm.setText(Double.toString(Math.round(10000000 * Math.pow(2, (-1) * zoomLvl))));
144            }
145        }
146    
147        private void updateUrl(boolean force) {
148            if(!lat.hasFocus() && !lon.hasFocus() && !zm.hasFocus() && !force) return;
149            try {
150                double dlat = Double.parseDouble(lat.getText());
151                double dlon = Double.parseDouble(lon.getText());
152                double m = Double.parseDouble(zm.getText());
153                // Inverse function to the one above. 18 is the current maximum zoom
154                // available on standard renderers, so choose this is in case m
155                // should be zero
156                int zoomLvl = 18;
157                if(m > 0)
158                    zoomLvl = (int)Math.round((-1) * Math.log(m/10000000)/Math.log(2));
159    
160                int decimals = (int) Math.pow(10, (zoomLvl / 3));
161                dlat = Math.round(dlat * decimals);
162                dlat /= decimals;
163                dlon = Math.round(dlon * decimals);
164                dlon /= decimals;
165                url.setText("http://www.openstreetmap.org/?lat="+dlat+"&lon="+dlon+"&zoom="+zoomLvl);
166            } catch (NumberFormatException x) {}
167        }
168    
169        public void actionPerformed(ActionEvent e) {
170            showJumpToDialog();
171        }
172    
173        public void mousePressed(MouseEvent e) {}
174    
175        public void mouseReleased(MouseEvent e) {}
176    
177        public void mouseEntered(MouseEvent e) {}
178    
179        public void mouseExited(MouseEvent e) {}
180    
181        public void mouseClicked(MouseEvent e) {
182            showJumpToDialog();
183        }
184    }