World Wind Java Development 11--Load hot spot information (imitation Google Earth)

There is a photo layer in the GE layer, where you can see some of the images that we call hot information, as shown in:

Then look at the implementation of this article:

The effect is not very much like, actually realize this is very simple, refer to examples in the balloons can be very easy to achieve, here I myself encapsulated Balloonutil class easy to reuse, code is simple to add a note will no longer expand, directly attached source code, There is no understanding of the place can be message exchange ha.

/** * @Copyright 2014-2020 @??? **/package Edu.whu.vge.util;import Gov.nasa.worldwind.avlist.avkey;import Gov.nasa.worldwind.awt.worldwindowglcanvas;import Gov.nasa.worldwind.geom.position;import Gov.nasa.worldwind.layers.renderablelayer;import Gov.nasa.worldwind.render.abstractbrowserballoon;import Gov.nasa.worldwind.render.balloonattributes;import Gov.nasa.worldwind.render.basicballoonattributes;import Gov.nasa.worldwind.render.globebrowserballoon;import Gov.nasa.worldwind.render.pointplacemark;import Gov.nasa.worldwind.render.size;import Gov.nasa.worldwind.util.logging;import Gov.nasa.worldwind.util.WWIO;import Gov.nasa.worldwindx.examples.util.ballooncontroller;import Gov.nasa.worldwindx.examples.util.HotSpotController; Import java.io.inputstream;/** * @ Project Name: Smartscope * @ class Name: Balloonsutil * @ class Description: * @ Creator: Liu Shuo * @ created: February 3, 2015 4:56:26 * @ Modified NOTE: * @ Version: */public class balloonsutil{private double Balloonlat;//balloon latitude private double balloonlon;//balloon Longitude private Strin G Ballooncontentpath; //html file path private String balloonname; Balloon name protected Hotspotcontroller hotspotcontroller;protected Ballooncontroller ballooncontroller;/** * * Create a new instance Balloonsutil. * * @param balloonlat * @param balloonlon * @param ballooncontentpath * @param balloonname */public balloonsutil (double b Alloonlat, double balloonlon,string Ballooncontentpath, String balloonname) {super (); This.balloonlat = Balloonlat; This.balloonlon = Balloonlon;this.ballooncontentpath = Ballooncontentpath;this.balloonname = BalloonName;} /** * S * * @ method Name: Makebrowserballoon; * @ Method Description: Generate balloon tag layer; * @ parameter: @param windowglcanvas * @ parameter: @return * @ return type: Ren Derablelayer; * Creator: Liu Shuo; * @ creation Time: February 3, 2015 PM 5:01:03; * @throws */public renderablelayer makebrowserballoon (Worldwindowglcanvas Windowglcanvas) {// ??? Ballooncontrollerthis.hotspotcontroller = new Hotspotcontroller (windowglcanvas); this.ballooncontroller = new Ballooncontroller (Windowglcanvas); Renderablelayer layer = new Renderablelayer (); Layer.setname (Balloonname); STring htmlstring = Null;inputstream Contentstream = null;try{//Read html file contents Contentstream = Wwio.openfileorresourcestream (ballooncontentpath,null); htmlstring = wwio.readstreamtostring (Contentstream, null);} catch (Exception e) {e.printstacktrace ();} Finally{wwio.closestream (Contentstream, Ballooncontentpath);} if (htmlstring = = null) htmlstring = Logging.getmessage ("Generic. Exceptionattemptingtoreadfile ", ballooncontentpath);//Create a globebrowserballoonposition balloonposition = Position.fromdegrees (Balloonlat, Balloonlon); Abstractbrowserballoon balloon = new Globebrowserballoon (htmlstring,balloonposition);// Set the Globebrowserballoon property balloonattributes attrs = new Basicballoonattributes (); Attrs.setsize (New Size (Size.NATIVE_ DIMENSION, 0d, null,size.native_dimension, 0d, null)); Balloon.setattributes (attrs);// Associating Globebrowserballoon with Pointplacemark pointplacemark placemark = new Pointplacemark (balloonposition); Placemark.setlabeltext (balloonname);p lacemark.setvalue (Avkey.balloon, BALLOON); Layer.addreNderable (balloon); layer.addrenderable (placemark); return layer;} Public double Getballoonlat () {return balloonlat;} public void Setballoonlat (double balloonlat) {This.balloonlat = Balloonlat;} Public double Getballoonlon () {return balloonlon;} public void Setballoonlon (double balloonlon) {This.balloonlon = Balloonlon;} Public String Getballooncontentpath () {return ballooncontentpath;} public void Setballooncontentpath (String ballooncontentpath) {this.ballooncontentpath = Ballooncontentpath;} Public String Getballoonname () {return balloonname;} public void Setballoonname (String balloonname) {this.balloonname = Balloonname;}}

When calling, simply type the following code:

String Htmlpath = System.getproperty ("User.dir") + "\\src\\edu\\whu\\vge\\data\\whu.html"; Balloonsutil balloonsutil = new Balloonsutil (30.5271,114.3604, Htmlpath, "I am Here"); Wwpanel.getworldwindowglcanvas (). Getmodel (). Getlayers (). Add (Balloonsutil.makebrowserballoon (Wwpanel.getworldwindowglcanvas ()));

In addition, we enclose the code of the Whu.html Web page for your reference.

World Wind Java Development 11--Load hot spot information (imitation Google Earth)