Class MouseState

src/main/java/field/graphics/Window.java:1059–1182

            this.x = x;
            this.y = y;
            this.dwheel = dwheel;
            this.dwheely = dwheely;
            this.dx = dx;
            this.dy = dy;
            this.time = time;
            this.buttonsDown.addAll(buttonsDown);
            this.mods = mods;
        }

        static public Set<Integer> buttonsPressed(MouseState before, MouseState after) {
            Set<Integer> b = new LinkedHashSet<Integer>(after.buttonsDown);
            b.removeAll(before.buttonsDown);
            return b;
        }

        static public Set<Integer> buttonsReleased(MouseState before, MouseState after) {
            Set<Integer> b = new LinkedHashSet<Integer>(before.buttonsDown);
            b.removeAll(after.buttonsDown);
            return b;
        }

        public MouseState next(int button, float dwheel, int dx, int dy, double x, double y, boolean bs, long time, int mods) {
            Set<Integer> buttonsDown = new LinkedHashSet<Integer>(this.buttonsDown);
            if (bs && button != -1) buttonsDown.add(button);
            else if (!bs && button != -1) buttonsDown.remove(button);

            return new MouseState(buttonsDown, x, y, dwheel, dwheely, dx, dy, time, mods);
        }

        public MouseState withButton(int button, boolean bs, int mods) {
            Set<Integer> buttonsDown = new LinkedHashSet<Integer>(this.buttonsDown);
            if (bs && button != -1) buttonsDown.add(button);
            else if (!bs && button != -1) buttonsDown.remove(button);
            MouseState m = new MouseState(buttonsDown, x, y, dwheel, dwheely, 0, 0, time, mods);
            return m;
        }

        public MouseState withMods(int mods) {
            return new MouseState(buttonsDown, x, y, dwheel, dwheely, x - this.x, y - this.y, time, mods);
        }

        // currently we ignore sy
        public MouseState withScroll(double sx, double sy) {
            return new MouseState(buttonsDown, x, y, (float) sx, (float) sy, dx, dy, time, mods);
        }

        public MouseState withPosition(double x, double y) {
            return new MouseState(buttonsDown, x, y, dwheel, dwheely, x - this.x, y - this.y, time, mods);
        }

        @Override
        public boolean equals(Object o) {
            if (this == o) return true;
            if (!(o instanceof MouseState)) return false;

            MouseState that = (MouseState) o;

            if (dwheel != that.dwheel) return false;