1 | // License: GPL. Copyright 2008 by Immanuel Scholz and others
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2 | package org.openstreetmap.josm.gui.layer.markerlayer;
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3 |
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4 | import java.awt.Graphics;
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5 | import java.awt.Point;
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6 | import java.awt.event.ActionEvent;
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7 | import java.awt.event.ActionListener;
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8 | import java.io.File;
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9 | import java.net.MalformedURLException;
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10 | import java.net.URL;
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11 | import java.util.Collection;
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12 | import java.util.HashMap;
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13 | import java.util.LinkedList;
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14 | import java.util.Map;
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15 |
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16 | import javax.swing.Icon;
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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.coor.EastNorth;
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20 | import org.openstreetmap.josm.data.coor.LatLon;
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21 | import org.openstreetmap.josm.data.gpx.GpxLink;
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22 | import org.openstreetmap.josm.data.gpx.WayPoint;
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23 | import org.openstreetmap.josm.gui.MapView;
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24 | import org.openstreetmap.josm.tools.ImageProvider;
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25 |
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26 | /**
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27 | * Basic marker class. Requires a position, and supports
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28 | * a custom icon and a name.
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29 | *
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30 | * This class is also used to create appropriate Marker-type objects
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31 | * when waypoints are imported.
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32 | *
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33 | * It hosts a public list object, named makers, containing implementations of
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34 | * the MarkerMaker interface. Whenever a Marker needs to be created, each
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35 | * object in makers is called with the waypoint parameters (Lat/Lon and tag
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36 | * data), and the first one to return a Marker object wins.
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37 | *
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38 | * By default, one the list contains one default "Maker" implementation that
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39 | * will create AudioMarkers for .wav files, ImageMarkers for .png/.jpg/.jpeg
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40 | * files, and WebMarkers for everything else. (The creation of a WebMarker will
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41 | * fail if there's no vaild URL in the <link> tag, so it might still make sense
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42 | * to add Makers for such waypoints at the end of the list.)
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43 | *
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44 | * The default implementation only looks at the value of the <link> tag inside
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45 | * the <wpt> tag of the GPX file.
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46 | *
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47 | * <h2>HowTo implement a new Marker</h2>
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48 | * <ul>
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49 | * <li> Subclass Marker or ButtonMarker and override <code>containsPoint</code>
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50 | * if you like to respond to user clicks</li>
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51 | * <li> Override paint, if you want a custom marker look (not "a label and a symbol")</li>
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52 | * <li> Implement MarkerCreator to return a new instance of your marker class</li>
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53 | * <li> In you plugin constructor, add an instance of your MarkerCreator
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54 | * implementation either on top or bottom of Marker.markerProducers.
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55 | * Add at top, if your marker should overwrite an current marker or at bottom
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56 | * if you only add a new marker style.</li>
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57 | * </ul>
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58 | *
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59 | * @author Frederik Ramm <frederik@remote.org>
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60 | */
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61 | public class Marker implements ActionListener {
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62 |
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63 | public final EastNorth eastNorth;
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64 | public final String text;
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65 | public final Icon symbol;
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66 |
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67 | /**
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68 | * Plugins can add their Marker creation stuff at the bottom or top of this list
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69 | * (depending on whether they want to override default behaviour or just add new
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70 | * stuff).
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71 | */
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72 | public static LinkedList<MarkerProducers> markerProducers = new LinkedList<MarkerProducers>();
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73 |
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74 | // Add one Maker specifying the default behaviour.
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75 | static {
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76 | Marker.markerProducers.add(new MarkerProducers() {
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77 | public Marker createMarker(WayPoint wpt, File relativePath) {
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78 | String uri = null;
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79 | // cheapest way to check whether "link" object exists and is a non-empty
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80 | // collection of GpxLink objects...
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81 | try {
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82 | for (GpxLink oneLink : (Collection<GpxLink>) wpt.attr.get("link")) {
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83 | uri = oneLink.uri;
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84 | break;
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85 | }
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86 | } catch (Exception ex) {};
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87 |
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88 | // Try a relative file:// url, if the link is not in an URL-compatible form
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89 | if (relativePath != null && uri != null && !isWellFormedAddress(uri))
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90 | uri = new File(relativePath, uri).toURI().toString();
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91 |
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92 | if (uri == null) {
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93 | String name_desc = "";
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94 | if (wpt.attr.containsKey("name")) {
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95 | name_desc = wpt.getString("name");
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96 | } else if (wpt.attr.containsKey("desc")) {
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97 | name_desc = wpt.getString("desc");
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98 | }
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99 | return new Marker(wpt.latlon, name_desc, wpt.getString("symbol"));
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100 | }
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101 |
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102 | if (uri.endsWith(".wav"))
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103 | return AudioMarker.create(wpt.latlon, uri);
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104 | else if (uri.endsWith(".png") || uri.endsWith(".jpg") || uri.endsWith(".jpeg") || uri.endsWith(".gif"))
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105 | return ImageMarker.create(wpt.latlon, uri);
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106 | else
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107 | return WebMarker.create(wpt.latlon, uri);
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108 | }
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109 |
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110 | private boolean isWellFormedAddress(String link) {
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111 | try {
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112 | new URL(link);
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113 | return true;
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114 | } catch (MalformedURLException x) {
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115 | return false;
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116 | }
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117 | }
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118 | });
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119 | }
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120 |
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121 | public Marker(LatLon ll, String text, String iconName) {
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122 | eastNorth = Main.proj.latlon2eastNorth(ll);
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123 | this.text = text;
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124 | Icon symbol = ImageProvider.getIfAvailable("markers",iconName);
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125 | if (symbol == null)
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126 | symbol = ImageProvider.getIfAvailable("symbols",iconName);
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127 | if (symbol == null)
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128 | symbol = ImageProvider.getIfAvailable("nodes",iconName);
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129 | this.symbol = symbol;
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130 | }
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131 |
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132 | /**
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133 | * Checks whether the marker display area contains the given point.
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134 | * Markers not interested in mouse clicks may always return false.
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135 | *
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136 | * @param p The point to check
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137 | * @return <code>true</code> if the marker "hotspot" contains the point.
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138 | */
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139 | public boolean containsPoint(Point p) {
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140 | return false;
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141 | }
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142 |
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143 | /**
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144 | * Called when the mouse is clicked in the marker's hotspot. Never
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145 | * called for markers which always return false from containsPoint.
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146 | *
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147 | * @param ev A dummy ActionEvent
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148 | */
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149 | public void actionPerformed(ActionEvent ev) {
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150 | }
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151 |
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152 | /**
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153 | * Paints the marker.
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154 | * @param g graphics context
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155 | * @param mv map view
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156 | * @param mousePressed true if the left mouse button is pressed
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157 | */
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158 | public void paint(Graphics g, MapView mv, boolean mousePressed, String show) {
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159 | Point screen = mv.getPoint(eastNorth);
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160 | if (symbol != null) {
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161 | symbol.paintIcon(mv, g, screen.x-symbol.getIconWidth()/2, screen.y-symbol.getIconHeight()/2);
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162 | } else {
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163 | g.drawLine(screen.x-2, screen.y-2, screen.x+2, screen.y+2);
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164 | g.drawLine(screen.x+2, screen.y-2, screen.x-2, screen.y+2);
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165 | }
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166 |
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167 | if ((text != null) && (show.equalsIgnoreCase("show")))
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168 | g.drawString(text, screen.x+4, screen.y+2);
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169 | }
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170 |
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171 | /**
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172 | * Returns an object of class Marker or one of its subclasses
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173 | * created from the parameters given.
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174 | *
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175 | * @param ll lat/lon for marker
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176 | * @param data hash containing keys and values from the GPX waypoint structure
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177 | * @param relativePath An path to use for constructing relative URLs or
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178 | * <code>null</code> for no relative URLs
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179 | * @return a new Marker object
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180 | */
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181 | public static Marker createMarker(WayPoint wpt, File relativePath) {
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182 | for (MarkerProducers maker : Marker.markerProducers) {
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183 | Marker marker = maker.createMarker(wpt, relativePath);
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184 | if (marker != null)
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185 | return marker;
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186 | }
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187 | return null;
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188 | }
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189 | }
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