| [9] | 1 | package org.openstreetmap.josm.gui;
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| 2 |
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| 3 | import java.awt.AWTEvent;
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| [39] | 4 | import java.awt.Cursor;
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| [36] | 5 | import java.awt.Font;
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| 6 | import java.awt.GridBagLayout;
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| [9] | 7 | import java.awt.Point;
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| 8 | import java.awt.Toolkit;
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| 9 | import java.awt.event.AWTEventListener;
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| 10 | import java.awt.event.InputEvent;
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| [39] | 11 | import java.awt.event.MouseAdapter;
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| [9] | 12 | import java.awt.event.MouseEvent;
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| 13 | import java.awt.event.MouseMotionListener;
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| [17] | 14 | import java.beans.PropertyChangeEvent;
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| 15 | import java.beans.PropertyChangeListener;
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| [36] | 16 | import java.util.Collection;
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| [51] | 17 | import java.util.ConcurrentModificationException;
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| [9] | 18 | import java.util.Map.Entry;
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| 19 |
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| 20 | import javax.swing.BorderFactory;
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| 21 | import javax.swing.BoxLayout;
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| 22 | import javax.swing.JLabel;
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| 23 | import javax.swing.JPanel;
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| 24 | import javax.swing.JTextField;
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| 25 | import javax.swing.Popup;
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| 26 | import javax.swing.PopupFactory;
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| 27 |
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| [39] | 28 | import org.openstreetmap.josm.Main;
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| [9] | 29 | import org.openstreetmap.josm.data.GeoPoint;
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| 30 | import org.openstreetmap.josm.data.osm.Key;
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| 31 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
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| 32 | import org.openstreetmap.josm.data.osm.visitor.SelectionComponentVisitor;
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| 33 |
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| 34 | /**
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| 35 | * A component that manages some status information display about the map.
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| 36 | * It keeps a status line below the map up to date and displays some tooltip
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| 37 | * information if the user hold the mouse long enough at some point.
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| 38 | *
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| 39 | * All this is done in background to not disturb other processes.
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| 40 | *
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| 41 | * The background thread does not alter any data of the map (read only thread).
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| 42 | * Also it is rather fail safe. In case of some error in the data, it just do
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| 43 | * nothing instead of whining and complaining.
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| 44 | *
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| 45 | * @author imi
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| 46 | */
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| 47 | public class MapStatus extends JPanel {
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| [56] | 48 |
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| [9] | 49 | /**
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| [16] | 50 | * The MapView this status belongs.
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| [9] | 51 | */
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| [16] | 52 | final MapView mv;
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| [9] | 53 | /**
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| 54 | * The position of the mouse cursor.
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| 55 | */
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| [22] | 56 | JTextField positionText = new JTextField("-000.00000000000000 -000.00000000000000".length());
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| [9] | 57 | /**
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| 58 | * The field holding the name of the object under the mouse.
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| 59 | */
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| [22] | 60 | JTextField nameText = new JTextField(30);
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| [56] | 61 |
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| [9] | 62 | /**
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| 63 | * The collector class that waits for notification and then update
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| 64 | * the display objects.
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| 65 | *
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| 66 | * @author imi
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| 67 | */
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| 68 | private final class Collector implements Runnable {
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| 69 | /**
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| 70 | * The last object displayed in status line.
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| 71 | */
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| [36] | 72 | Collection<OsmPrimitive> osmStatus;
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| [9] | 73 | /**
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| 74 | * The old modifiers, that was pressed the last time this collector ran.
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| 75 | */
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| 76 | private int oldModifiers;
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| 77 | /**
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| 78 | * The popup displayed to show additional information
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| 79 | */
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| 80 | private Popup popup;
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| [17] | 81 | /**
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| 82 | * Signals the collector to shut down on next event.
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| 83 | */
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| 84 | boolean exitCollector = false;
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| [56] | 85 |
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| [9] | 86 | /**
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| 87 | * Execution function for the Collector.
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| 88 | */
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| 89 | public void run() {
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| 90 | for (;;) {
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| 91 | MouseState ms = new MouseState();
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| 92 | synchronized (this) {
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| 93 | try {wait();} catch (InterruptedException e) {}
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| 94 | ms.modifiers = mouseState.modifiers;
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| 95 | ms.mousePos = mouseState.mousePos;
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| 96 | }
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| [17] | 97 | if (exitCollector)
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| 98 | return;
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| [9] | 99 | if ((ms.modifiers & MouseEvent.CTRL_DOWN_MASK) != 0 || ms.mousePos == null)
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| 100 | continue; // freeze display when holding down ctrl
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| [36] | 101 |
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| [51] | 102 | // This try/catch is a hack to stop the flooding bug reports about this.
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| 103 | // The exception needed to handle with in the first place, means that this
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| 104 | // access to the data need to be restarted, if the main thread modifies
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| 105 | // the data.
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| 106 | try {
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| [56] | 107 | Collection<OsmPrimitive> osms = mv.getAllNearest(ms.mousePos);
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| 108 |
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| 109 | if (osms == null && osmStatus == null && ms.modifiers == oldModifiers)
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| 110 | continue;
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| 111 | if (osms != null && osms.equals(osmStatus) && ms.modifiers == oldModifiers)
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| 112 | continue;
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| 113 |
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| 114 | osmStatus = osms;
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| 115 | oldModifiers = ms.modifiers;
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| 116 |
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| 117 | OsmPrimitive osmNearest = null;
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| [51] | 118 | // Set the text label in the bottom status bar
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| 119 | osmNearest = mv.getNearest(ms.mousePos, (ms.modifiers & MouseEvent.ALT_DOWN_MASK) != 0);
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| [56] | 120 | if (osmNearest != null) {
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| 121 | SelectionComponentVisitor visitor = new SelectionComponentVisitor();
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| 122 | osmNearest.visit(visitor);
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| 123 | nameText.setText(visitor.name);
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| 124 | } else
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| 125 | nameText.setText("");
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| 126 |
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| 127 | // Popup Information
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| 128 | if ((ms.modifiers & MouseEvent.BUTTON2_DOWN_MASK) != 0 && osms != null) {
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| 129 | if (popup != null)
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| 130 | popup.hide();
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| 131 |
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| 132 | JPanel c = new JPanel(new GridBagLayout());
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| 133 | for (final OsmPrimitive osm : osms) {
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| 134 | SelectionComponentVisitor visitor = new SelectionComponentVisitor();
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| 135 | osm.visit(visitor);
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| 136 | final StringBuilder text = new StringBuilder();
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| 137 | if (osm.id == 0 || osm.modified || osm.modifiedProperties)
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| 138 | visitor.name = "<i><b>"+visitor.name+"*</b></i>";
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| 139 | text.append(visitor.name);
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| 140 | if (osm.id != 0)
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| 141 | text.append("<br>id="+osm.id);
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| 142 | if (osm.keys != null)
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| 143 | for (Entry<Key, String> e : osm.keys.entrySet())
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| 144 | text.append("<br>"+e.getKey().name+"="+e.getValue());
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| 145 | final JLabel l = new JLabel("<html>"+text.toString()+"</html>", visitor.icon, JLabel.HORIZONTAL);
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| 146 | l.setFont(l.getFont().deriveFont(Font.PLAIN));
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| 147 | l.setVerticalTextPosition(JLabel.TOP);
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| 148 | l.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
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| 149 | l.addMouseListener(new MouseAdapter(){
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| 150 | @Override
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| 151 | public void mouseEntered(MouseEvent e) {
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| 152 | l.setText("<html><u color='blue'>"+text.toString()+"</u></html>");
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| 153 | }
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| 154 | @Override
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| 155 | public void mouseExited(MouseEvent e) {
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| 156 | l.setText("<html>"+text.toString()+"</html>");
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| 157 | }
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| 158 | @Override
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| 159 | public void mouseClicked(MouseEvent e) {
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| 160 | Main.main.ds.clearSelection();
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| 161 | osm.setSelected(true);
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| 162 | mv.repaint();
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| 163 | }
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| 164 | });
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| 165 | c.add(l, GBC.eol());
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| 166 | }
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| 167 |
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| 168 | Point p = mv.getLocationOnScreen();
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| 169 | popup = PopupFactory.getSharedInstance().getPopup(mv, c, p.x+ms.mousePos.x+16, p.y+ms.mousePos.y+16);
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| 170 | popup.show();
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| 171 | } else if (popup != null) {
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| [9] | 172 | popup.hide();
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| [56] | 173 | popup = null;
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| [9] | 174 | }
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| [56] | 175 | } catch (ConcurrentModificationException x) {
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| [9] | 176 | }
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| 177 | }
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| 178 | }
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| 179 | }
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| [56] | 180 |
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| [9] | 181 | /**
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| 182 | * Everything, the collector is interested of. Access must be synchronized.
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| 183 | * @author imi
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| 184 | */
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| 185 | class MouseState {
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| 186 | Point mousePos;
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| 187 | int modifiers;
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| 188 | }
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| 189 | /**
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| 190 | * The last sent mouse movement event.
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| 191 | */
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| [22] | 192 | MouseState mouseState = new MouseState();
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| [9] | 193 |
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| 194 | /**
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| [16] | 195 | * Construct a new MapStatus and attach it to the map view.
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| 196 | * @param mv The MapView the status line is part of.
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| [9] | 197 | */
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| [17] | 198 | public MapStatus(final MapFrame mapFrame) {
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| 199 | this.mv = mapFrame.mapView;
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| [9] | 200 |
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| 201 | // Listen for mouse movements and set the position text field
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| 202 | mv.addMouseMotionListener(new MouseMotionListener(){
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| 203 | public void mouseDragged(MouseEvent e) {
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| 204 | mouseMoved(e);
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| 205 | }
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| 206 | public void mouseMoved(MouseEvent e) {
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| 207 | // Do not update the view, if ctrl is pressed.
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| 208 | if ((e.getModifiersEx() & MouseEvent.CTRL_DOWN_MASK) == 0) {
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| 209 | GeoPoint p = mv.getPoint(e.getX(),e.getY(),true);
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| 210 | positionText.setText(p.lat+" "+p.lon);
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| 211 | }
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| 212 | }
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| 213 | });
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| 214 |
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| [17] | 215 | positionText.setEditable(false);
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| 216 | nameText.setEditable(false);
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| 217 | setLayout(new BoxLayout(this, BoxLayout.X_AXIS));
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| 218 | setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
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| 219 | add(new JLabel("Lat/Lon "));
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| 220 | add(positionText);
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| 221 | add(new JLabel(" Object "));
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| 222 | add(nameText);
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| [56] | 223 |
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| [17] | 224 | // The background thread
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| 225 | final Collector collector = new Collector();
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| 226 | new Thread(collector).start();
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| [56] | 227 |
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| [9] | 228 | // Listen to keyboard/mouse events for pressing/releasing alt key and
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| 229 | // inform the collector.
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| 230 | Toolkit.getDefaultToolkit().addAWTEventListener(new AWTEventListener(){
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| 231 | public void eventDispatched(AWTEvent event) {
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| 232 | synchronized (collector) {
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| 233 | mouseState.modifiers = ((InputEvent)event).getModifiersEx();
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| 234 | if (event instanceof MouseEvent)
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| 235 | mouseState.mousePos = ((MouseEvent)event).getPoint();
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| 236 | collector.notify();
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| 237 | }
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| 238 | }
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| 239 | }, AWTEvent.KEY_EVENT_MASK | AWTEvent.MOUSE_EVENT_MASK | AWTEvent.MOUSE_MOTION_EVENT_MASK);
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| [17] | 240 |
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| 241 | // listen for shutdowns to cancel the background thread
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| 242 | mapFrame.addPropertyChangeListener("visible", new PropertyChangeListener(){
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| 243 | public void propertyChange(PropertyChangeEvent evt) {
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| 244 | if (evt.getNewValue() == Boolean.FALSE) {
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| 245 | collector.exitCollector = true;
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| 246 | synchronized (collector) {
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| 247 | collector.notify();
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| 248 | }
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| 249 | }
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| 250 | }
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| 251 | });
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| [9] | 252 | }
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| 253 | }
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