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function mirror_status(chart_id, data_url) {
var jq_div = jQuery(chart_id);
var draw_graph = function(data) {
var margin = {top: 20, right: 20, bottom: 30, left: 40},
width = jq_div.width() - margin.left - margin.right,
height = jq_div.height() - margin.top - margin.bottom;
var color = d3.scale.category20(),
x = d3.time.scale.utc().range([0, width]),
y = d3.scale.linear().range([height, 0]),
x_axis = d3.svg.axis().scale(x).orient("bottom"),
y_axis = d3.svg.axis().scale(y).orient("left");
/* remove any existing graph first if we are redrawing after resize */
d3.select(chart_id).select("svg").remove();
var svg = d3.select(chart_id).append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
x.domain(d3.extent(data, function(d) { return d.check_time; })).nice(d3.time.hour);
y.domain(d3.extent(data, function(d) { return d.duration; })).nice();
/* build the axis lines... */
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(x_axis)
.append("text")
.attr("class", "label")
.attr("x", width)
.attr("y", -6)
.style("text-anchor", "end")
.text("Check Time (UTC)");
svg.append("g")
.attr("class", "y axis")
.call(y_axis)
.append("text")
.attr("class", "label")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", ".71em")
.style("text-anchor", "end")
.text("Duration (seconds)");
/* ...then the points themselves. */
svg.selectAll(".dot")
.data(data)
.enter()
.append("circle")
.attr("class", "dot")
.attr("r", 3.5)
.attr("cx", function(d) { return x(d.check_time); })
.attr("cy", function(d) { return y(d.duration); })
.style("fill", function(d) { return color(d.url); });
/* add a legend for good measure */
var legend = svg.selectAll(".legend")
.data(color.domain())
.enter().append("g")
.attr("class", "legend")
.attr("transform", function(d, i) { return "translate(0," + i * 20 + ")"; });
legend.append("rect")
.attr("x", width - 18)
.attr("width", 18)
.attr("height", 18)
.style("fill", color);
legend.append("text")
.attr("x", width - 24)
.attr("y", 9)
.attr("dy", ".35em")
.style("text-anchor", "end")
.text(function(d) { return d; });
};
/* invoke the data-fetch + first draw */
var cached_data = null;
d3.json(data_url, function(json) {
cached_data = jQuery.map(json['urls'],
function(url, i) {
return jQuery.map(url['logs'],
function(log, j) {
return {
url: url['url'],
duration: log['duration'],
check_time: new Date(log['check_time'])
};
});
});
draw_graph(cached_data);
});
/* then hook up a resize handler to redraw if necessary */
var resize_timeout = null;
var real_resize = function() {
resize_timeout = null;
draw_graph(cached_data);
};
jQuery(window).resize(function() {
if (resize_timeout) {
clearTimeout(resize_timeout);
}
resize_timeout = setTimeout(real_resize, 200);
});
}
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