通过为每个航路点创建mouseClicked事件，我在JXMapViewers的Github的某些示例代码中添加了功能。最终，每个航路点都会显示独特的信息，例如坐标。
在我当前的实现中，只有添加到Set<MyWaypoint>的最后一个元素才会在控制台中显示以下内容。
在航点的10个像素内检测到mapViewer鼠标单击
关于检测Set中其他航路点的mouseClicked事件有何想法？
public class Sample4 {
private static JXMapViewer mapViewer;
/**
* @param args the program args (ignored)
*/
public static void main(String[] args) {
// Create a TileFactoryInfo for Virtual Earth
TileFactoryInfo info = new VirtualEarthTileFactoryInfo(VirtualEarthTileFactoryInfo.MAP);
DefaultTileFactory tileFactory = new DefaultTileFactory(info);
tileFactory.setThreadPoolSize(8);
// Setup local file cache
File cacheDir = new File(System.getProperty("user.home") + File.separator + ".jxmapviewer2");
LocalResponseCache.installResponseCache(info.getBaseURL(), cacheDir, false);
// Setup JXMapViewer
mapViewer = new JXMapViewer();
mapViewer.setTileFactory(tileFactory);
GeoPosition frankfurt = new GeoPosition(50, 7, 0, 8, 41, 0);
GeoPosition wiesbaden = new GeoPosition(50, 5, 0, 8, 14, 0);
GeoPosition mainz = new GeoPosition(50, 0, 0, 8, 16, 0);
GeoPosition darmstadt = new GeoPosition(49, 52, 0, 8, 39, 0);
GeoPosition offenbach = new GeoPosition(50, 6, 0, 8, 46, 0);
// Set the focus
mapViewer.setZoom(10);
mapViewer.setAddressLocation(frankfurt);
// Add interactions
MouseInputListener mia = new PanMouseInputListener(mapViewer);
mapViewer.addMouseListener(mia);
mapViewer.addMouseMotionListener(mia);
mapViewer.addMouseListener(new CenterMapListener(mapViewer));
mapViewer.addMouseWheelListener(new ZoomMouseWheelListenerCenter(mapViewer));
mapViewer.addKeyListener(new PanKeyListener(mapViewer));
// Create a track from the geo-positions
final List<GeoPosition> track = Arrays.asList(frankfurt, wiesbaden, mainz, darmstadt, offenbach);
RoutePainter routePainter = new RoutePainter(track);
// Create waypoints from the geo-positions
Set<MyWaypoint> waypoints = new HashSet<MyWaypoint>(Arrays.asList(
new MyWaypoint("1", Color.ORANGE, frankfurt),
new MyWaypoint("2", Color.CYAN, wiesbaden),
new MyWaypoint("3", Color.GRAY, mainz),
new MyWaypoint("4", Color.MAGENTA, darmstadt),
new MyWaypoint("5", Color.GREEN, offenbach)));
// Create a waypoint painter that takes all the waypoints
WaypointPainter<MyWaypoint> waypointPainter = new WaypointPainter<MyWaypoint>();
waypointPainter.setWaypoints(waypoints);
waypointPainter.setRenderer(new FancyWaypointRenderer());
// Create a compound painter that uses both the route-painter and the waypoint-painter
List<Painter<JXMapViewer>> painters = new ArrayList<Painter<JXMapViewer>>();
painters.add(routePainter);
painters.add(waypointPainter);
CompoundPainter<JXMapViewer> painter = new CompoundPainter<JXMapViewer>(painters);
mapViewer.setOverlayPainter(painter);
mapViewer.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent me) {
Point2D gp_pt = null;
for (GeoPosition waypoint : track) {
//convert to world bitmap
gp_pt = mapViewer.getTileFactory().geoToPixel(waypoint, mapViewer.getZoom());
}
//convert to screen
Rectangle rect = mapViewer.getViewportBounds();
Point converted_gp_pt = new Point((int) gp_pt.getX() - rect.x,
(int) gp_pt.getY() - rect.y);
//check if near the mouse
if (converted_gp_pt.distance(me.getPoint()) < 10) {
System.out.println("mapViewer mouse click has been detected within 10 pixels of a waypoint");
} else {
System.out.println("mapViewer mouse click has been dected but NOT with 10 pixels of a waypoint ");
}
}
}); // end MouseAdapter
// Display the viewer in a JFrame
JFrame frame = new JFrame("JXMapviewer2 Example 4");
frame.getContentPane().add(mapViewer);
frame.setSize(800, 600);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
public static JXMapViewer getMapViewer() {
return mapViewer;
}
}
最佳答案
我认为，如果要检查所有航路点，应在for中添加“ //转换到屏幕”块和“ //检查是否靠近鼠标”，即：
public void mouseClicked(MouseEvent me) {
Point2D gp_pt = null;
for (GeoPosition waypoint : track) {
//convert to world bitmap
gp_pt = mapViewer.getTileFactory().geoToPixel(waypoint, mapViewer.getZoom());
//convert to screen
Rectangle rect = mapViewer.getViewportBounds();
Point converted_gp_pt = new Point((int) gp_pt.getX() - rect.x,
(int) gp_pt.getY() - rect.y);
//check if near the mouse
if (converted_gp_pt.distance(me.getPoint()) < 10) {
System.out.println("mapViewer mouse click has been detected within 10 pixels of a waypoint");
} else {
System.out.println("mapViewer mouse click has been dected but NOT with 10 pixels of a waypoint ");
}
}
}