var orig = {
    from: 20,
    to: 500
};

var reload = function (div) {
    var board = tnt.board().from(orig.from).to(orig.to);

    // reload button
    var reload = d3.select(div)
        .append("button")
        .text("reload")
        .style("margin", "10px")
        .on("click", function () {
            board.from(orig.from);
            board.to(orig.to);
            board.start();
        });

    var axis_track = tnt.board.track()
        .height(0)
        .color("white")
        .display(tnt.board.track.feature.axis()
            .orientation("top")
        );
    var pin_track = tnt.board.track()
        .height(60)
        .color("white")
        .display(tnt.board.track.feature.pin()
            .domain([0.3, 1.2])
            .color("red")
            .on("click", function (d) {
                console.log(d);
            })
            .on("mouseover", function (d) {
                console.log("mouseover");
            })
        )
        .data(tnt.board.track.data.sync()
            .retriever (function () {
                return [
                    {
                        pos : 200,
                        val : 0.5,
                        label : "1"
                    },
                    {
                        pos : 355,
                        val : 0.8,
                        label : "2"
                    },
                    {
                        pos : 100,
                        val : 0.3,
                        label : "3"
                    },
                    {
                        pos : 400,
                        val : 1,
                        label : "4"
                    }
                ];
            })
        );

    board
        .add_track(axis_track)
        .add_track(pin_track);

    board(div);
    board.start();
};