package de.fhpotsdam.unfolding.examples.marker.cluster;
import java.util.List;
import processing.core.PApplet;
import de.fhpotsdam.unfolding.UnfoldingMap;
import de.fhpotsdam.unfolding.data.Feature;
import de.fhpotsdam.unfolding.data.GeoRSSReader;
import de.fhpotsdam.unfolding.marker.Marker;
import de.fhpotsdam.unfolding.marker.MarkerManager;
import de.fhpotsdam.unfolding.utils.MapUtils;
import de.fhpotsdam.unfolding.utils.ScreenPosition;
/**
* Simple interactive grid marker example.
*
* Counts all markers within a grid region, and colors the rectangle in proportion.
*
*/
public class MarkerGridApp extends PApplet {
String earthquakesURL = "http://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/4.5_week.atom";
UnfoldingMap map;
public void setup() {
size(800, 600, P2D);
smooth();
map = new UnfoldingMap(this);
map.zoomToLevel(2);
MapUtils.createDefaultEventDispatcher(this, map);
List<Feature> features = GeoRSSReader.loadDataGeoRSS(this, earthquakesURL);
List<Marker> markers = MapUtils.createSimpleMarkers(features);
map.addMarkers(markers);
}
public void draw() {
background(0);
map.draw();
int gridWidth = 100;
int gridHeight = 100;
for (int x = 0; x < width; x += gridWidth) {
for (int y = 0; y < height; y += gridHeight) {
int insideMarkerNumber = 0;
// Count markers inside the current grid rectangle
MarkerManager<Marker> markerManager = map.getDefaultMarkerManager();
for (Marker m : markerManager.getMarkers()) {
ScreenPosition pos = map.getScreenPosition(m.getLocation());
if (pos.x > x && pos.x < x + gridWidth && pos.y > y && pos.y < y + gridHeight) {
insideMarkerNumber++;
}
}
// Map number to color
float alpha = map(insideMarkerNumber, 0, 10, 0, 255);
// Draw current grid rectangle
fill(255, 0, 0, alpha);
rect(x, y, gridWidth, gridHeight);
}
}
}
}