@SuppressLint("NewApi")
public void run() {
if (clusters.equals(DefaultClusterRenderer.this.mClusters)) {
mCallback.run();
return;
}
final MarkerModifier markerModifier = new MarkerModifier();
final float zoom = mMapZoom;
final boolean zoomingIn = zoom > mZoom;
final float zoomDelta = zoom - mZoom;
final Set<MarkerWithPosition> markersToRemove = mMarkers;
final LatLngBounds visibleBounds = mProjection.getVisibleRegion().latLngBounds;
// TODO: Add some padding, so that markers can animate in from off-screen.
// Find all of the existing clusters that are on-screen. These are candidates for
// markers to animate from.
List<Point> existingClustersOnScreen = null;
if (DefaultClusterRenderer.this.mClusters != null && SHOULD_ANIMATE) {
existingClustersOnScreen = new ArrayList<Point>();
for (Cluster<T> c : DefaultClusterRenderer.this.mClusters) {
if (shouldRenderAsCluster(c) && visibleBounds.contains(c.getPosition())) {
Point point = mSphericalMercatorProjection.toPoint(c.getPosition());
existingClustersOnScreen.add(point);
}
}
}
// Create the new markers and animate them to their new positions.
final Set<MarkerWithPosition> newMarkers = new HashSet<MarkerWithPosition>();
for (Cluster<T> c : clusters) {
boolean onScreen = visibleBounds.contains(c.getPosition());
if (zoomingIn && onScreen && SHOULD_ANIMATE) {
Point point = mSphericalMercatorProjection.toPoint(c.getPosition());
Point closest = findClosestCluster(existingClustersOnScreen, point);
if (closest != null) {
LatLng animateTo = mSphericalMercatorProjection.toLatLng(closest);
markerModifier.add(true, new CreateMarkerTask(c, newMarkers, animateTo));
} else {
markerModifier.add(true, new CreateMarkerTask(c, newMarkers, null));
}
} else {
markerModifier.add(onScreen, new CreateMarkerTask(c, newMarkers, null));
}
}
// Wait for all markers to be added.
markerModifier.waitUntilFree();
// Don't remove any markers that were just added. This is basically anything that had
// a hit in the MarkerCache.
markersToRemove.removeAll(newMarkers);
// Find all of the new clusters that were added on-screen. These are candidates for
// markers to animate from.
List<Point> newClustersOnScreen = null;
if (SHOULD_ANIMATE) {
newClustersOnScreen = new ArrayList<Point>();
for (Cluster<T> c : clusters) {
if (shouldRenderAsCluster(c) && visibleBounds.contains(c.getPosition())) {
Point p = mSphericalMercatorProjection.toPoint(c.getPosition());
newClustersOnScreen.add(p);
}
}
}
// Remove the old markers, animating them into clusters if zooming out.
for (final MarkerWithPosition marker : markersToRemove) {
boolean onScreen = visibleBounds.contains(marker.position);
// Don't animate when zooming out more than 3 zoom levels.
// TODO: drop animation based on speed of device & number of markers to animate.
if (!zoomingIn && zoomDelta > -3 && onScreen && SHOULD_ANIMATE) {
final Point point = mSphericalMercatorProjection.toPoint(marker.position);
final Point closest = findClosestCluster(newClustersOnScreen, point);
if (closest != null) {
LatLng animateTo = mSphericalMercatorProjection.toLatLng(closest);
markerModifier.animateThenRemove(marker, marker.position, animateTo);
} else {
markerModifier.remove(true, marker.marker);
}
} else {
markerModifier.remove(onScreen, marker.marker);
}
}
markerModifier.waitUntilFree();
mMarkers = newMarkers;
DefaultClusterRenderer.this.mClusters = clusters;
mZoom = zoom;
mCallback.run();
}
