public GraphLayout(Graph graph) {
_graph = graph;
// A low damper value causes the graph to move slowly; as
// layout proceeds, the damper value decreases.
_damper = 1.0f;
_damping = true;
// Rigidity has the same effect as the damper, except that it's a constant.
// A low rigidity value causes things to go slowly.
// A value that's too high will cause oscillation.
_rigidity = 0.25f;
_newRigidity = 0.25f;
// Allow's tracking the fastest moving node to see if the graph is stabilizing
_maxMotion = 0;
_lastMaxMotion = 0;
_motionRatio = 0;
_intermediateMaxMotion = 0;
}
private static void UpdatePhotos(bool newPhotos) {
if (newPhotos) {
if (_mapEntities != null) {
_map.Entities.Remove(_mapEntities);
}
_mapEntities = new MapEntityCollection();
_map.Entities.Push(_mapEntities);
_photoViews = new Dictionary<string, PhotoView>();
}
if (_model.Photos.Count == 0) {
Document.Body.ClassName = MapModeClassName;
return;
}
Document.Body.ClassName = PhotosModeClassName;
_graph = new Graph();
_model.Photos.ForEach(delegate(Photo photo) {
MapLocation location = new MapLocation(photo.latitude, photo.longitude);
MapPoint point = _map.TryLocationToPixel(location, MapPointReference.Control);
PhotoView photoView;
if (newPhotos) {
MapPolylineOptions connectorOptions = new MapPolylineOptions();
connectorOptions.StrokeColor = new MapColor(255, 0x4E, 0xD3, 0x4E);
connectorOptions.StrokeThickness = 2;
MapInfoboxOptions calloutOptions = new MapInfoboxOptions();
calloutOptions.Width = 50;
calloutOptions.Height = 50;
calloutOptions.ShowPointer = false;
calloutOptions.ShowCloseButton = false;
calloutOptions.Offset = new MapPoint(-25, -25);
calloutOptions.HtmlContent =
"<div class=\"photoInfobox\" style=\"background-image: url(" + photo.thumbnailUrl + ")\"" +
" title=\"" + photo.title.HtmlEncode() + "\"></div>";
calloutOptions.Visible = true;
MapPushpinOptions pushpinOptions = new MapPushpinOptions();
pushpinOptions.Icon = "Dot.png";
pushpinOptions.Width = 10;
pushpinOptions.Height = 10;
pushpinOptions.Anchor = new MapPoint(5, 5);
pushpinOptions.TypeName = "locationPushpin";
photoView = new PhotoView();
photoView.pushpin = new MapPushpin(location, pushpinOptions);
photoView.connector = new MapPolyline(new MapLocation[] { location, location }, connectorOptions);
photoView.callout = new MapInfobox(location, calloutOptions);
photoView.callout.Data = photo;
_photoViews[photo.id] = photoView;
_mapEntities.Insert(photoView.connector, 0);
_mapEntities.Insert(photoView.callout, 0);
_mapEntities.Insert(photoView.pushpin, 0);
MapEvents.AddHandler(photoView.callout, "click", delegate(MapEventArgs e) {
ShowPhoto(photo);
});
}
else {
photoView = _photoViews[photo.id];
}
photoView.pushpinNode = new GraphNode();
photoView.pushpinNode.x = point.X;
photoView.pushpinNode.y = point.Y;
photoView.pushpinNode.moveable = false;
photoView.calloutNode = new GraphNode();
photoView.calloutNode.x = point.X;
photoView.calloutNode.y = point.Y;
GraphEdge connectorEdge = new GraphEdge(photoView.pushpinNode,
photoView.calloutNode,
10 + Math.Random() * 15);
_graph.AddNode(photoView.pushpinNode);
_graph.AddNode(photoView.calloutNode);
_graph.AddEdge(connectorEdge);
});
Window.SetTimeout(UpdateLayout, 30);
}