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function packages_treemap(chart_id, orderings, default_order) {
var jq_div = $(chart_id),
color = d3.scale.category20();
key_func = function(d) { return d.key; },
value_package_count = function(d) { return d.count; };
var treemap = d3.layout.treemap()
.size([jq_div.width(), jq_div.height()])
/*.sticky(true)*/
.value(value_package_count)
.sort(function(a, b) { return a.key < b.key; })
.children(function(d) { return d.data; });
var cell_html = function(d) {
if (d.children) {
return "";
}
return "<span>" + d.name + ": " + treemap.value()(d) + "</span>";
};
var d3_div = d3.select(jq_div.get(0));
var prop_px = function(prop, offset) {
return function(d) {
var dist = d[prop] + offset;
if (dist > 0) return dist + "px";
else return "0px";
};
};
var cell = function() {
/* the -1 offset comes from the border width we use in the CSS */
this.style("left", prop_px("x", 0)).style("top", prop_px("y", 0))
.style("width", prop_px("dx", -1)).style("height", prop_px("dy", -1));
};
var fetch_for_ordering = function(order) {
d3.json(order.url, function(json) {
var nodes = d3_div.data([json]).selectAll("div").data(treemap.nodes, key_func);
/* start out new nodes in the center of the picture area */
var w_center = jq_div.width() / 2;
var h_center = jq_div.height() / 2;
nodes.enter().append("div")
.attr("class", "treemap-cell")
.attr("title", function(d) { return d.name; })
.style("left", w_center + "px").style("top", h_center + "px")
.style("width", "0px").style("height", "0px")
.style("display", function(d) { return d.children ? "none" : null; })
.html(cell_html);
nodes.transition().duration(1500)
.style("background-color", function(d) { return d.children ? null : color(d[order.color_attr]); })
.call(cell);
nodes.exit().transition().duration(1500).remove();
});
};
/* start the callback for the default order */
fetch_for_ordering(orderings[default_order]);
var make_scale_button = function(name, valuefunc) {
var button_id = chart_id + "-" + name;
/* upon button click, attach new value function and redraw all boxes
* accordingly */
d3.select(button_id).on("click", function() {
d3_div.selectAll("div")
.data(treemap.value(valuefunc), key_func)
.html(cell_html)
.transition().duration(1500).call(cell);
/* drop off the '#' sign to convert id to a class prefix */
d3.selectAll("." + chart_id.substring(1) + "-scaleby")
.classed("active", false);
d3.select(button_id).classed("active", true);
});
};
/* each scale button tweaks our value, e.g. net size function */
make_scale_button("count", value_package_count);
make_scale_button("flagged", function(d) { return d.flagged; });
make_scale_button("csize", function(d) { return d.csize; });
make_scale_button("isize", function(d) { return d.isize; });
var make_group_button = function(name, order) {
var button_id = chart_id + "-" + name;
d3.select(button_id).on("click", function() {
fetch_for_ordering(order);
/* drop off the '#' sign to convert id to a class prefix */
d3.selectAll("." + chart_id.substring(1) + "-groupby")
.classed("active", false);
d3.select(button_id).classed("active", true);
});
};
$.each(orderings, function(k, v) {
make_group_button(k, v);
});
var resize_timeout = null;
var real_resize = function() {
resize_timeout = null;
d3_div.selectAll("div")
.data(treemap.size([jq_div.width(), jq_div.height()]), key_func)
.call(cell);
};
$(window).resize(function() {
if (resize_timeout) {
clearTimeout(resize_timeout);
}
resize_timeout = setTimeout(real_resize, 200);
});
}
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