Method dispatch

src/main/java/fieldbox/boxes/Mouse.java:56–168

(Box root, Window.Event<Window.MouseState> event)

	int click = 0;

	public void dispatch(Box root, Window.Event<Window.MouseState> event) {

		Optional<Drawing> drawing = root.find(Drawing.drawing, root.both())
						.findFirst();
		if (drawing.isPresent())
		{
			fixDrawingSpace(drawing, event.after);
			fixDrawingSpace(drawing, event.before);
		}

		Box startAt = Intersects.startAt(event.after, root);

		event.properties.put(originatesAt, startAt);

		Set<Integer> pressed = Window.MouseState.buttonsPressed(event.before, event.after);
		Set<Integer> released = Window.MouseState.buttonsReleased(event.before, event.after);
		Set<Integer> down = event.after.buttonsDown;

		if (pressed.size()==1) {
			if (startAt == lastStartAt && System.currentTimeMillis() - lastStartAtTime < 300) {
				event.properties.put(clickNumber, ++click);

			} else {
				event.properties.put(clickNumber, click=1);
				lastStartAt = startAt;
			}

			lastStartAtTime = System.currentTimeMillis();
		}

		released.stream()
			.map(r -> ongoingDrags.remove(r))
			.filter(x -> x != null)
			.forEach(drags -> {
				drags.stream()
				     .filter(d -> d != null)
				     .forEach(dragger -> dragger.update(event, true));
				drags.clear();
			});

		for (Collection<Dragger> d : ongoingDrags.values()) {
			Iterator<Dragger> dd = d.iterator();
			while (dd.hasNext()) {
				Dragger dragger = dd.next();
				boolean cont = false;
				try {
					cont = dragger.update(event, false);
				} catch (Throwable t) {
					System.err.println(" Exception thrown in dragger update :" + t);
					System.err.println(" dragger will not be called again");
					t.printStackTrace();
					cont = false;
				}
				if (!cont) dd.remove();
			}
		}

		Util.Errors errors = new Util.Errors();