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/*
Draw line chart in d3.
It support 2 types of usage:
* as a standard line chart
* as a line chart in a modal window
To use as a standard line chart the following data attributes need to be
provided for a div:
data-chart-type - must be "line_chart"
data-url - (string) url for the json data for the chart
data-series - (string) the list of series separated by comma
Example:
<div data-chart-type="line_chart"
data-url="/data_url"
data-series="cpu,ram,storage,network">
</div>
To use as a line chart in a modal windows the following data attributes
need to be provided for a link:
data-chart-type - must be "modal_line_chart"
data-url - (string) url for the json data for the chart
data-series - (string) the list of series separated by comma
Example:
<a data-chart-type="modal_line_chart"
data-url="/data_url"
data-series="network">
Click me!
</a>
*/
horizon.d3_line_chart = {
init: function() {
var self = this;
self.init_line_charts();
self.init_modal_chart_links();
},
init_line_charts: function() {
var self = this;
line_charts = $("div[data-chart-type='line_chart']");
$.each(line_charts, function(index, line_chart) {
if($(line_chart).data('modal') != true) {
var template = horizon.templates.compiled_templates["#modal_chart_template"];
self.init_svg(line_chart);
self.draw(self.data(line_chart));
}
});
},
init_modal_chart_links: function() {
var self = this;
$(document).on('click', "a[data-chart-type='modal_line_chart']", function(event) {
event.preventDefault();
var template = horizon.templates.compiled_templates["#modal_chart_template"];
$('#modal_wrapper').append(template.render({classes: "modal"}));
var modal = $('.modal:last');
modal.modal();
$(modal).on('click', 'ul#interval_selector li a', function(event){
event.preventDefault();
self.url_options.interval = $(event.target).data('interval');
self.draw(self.url_options);
$("ul#interval_selector li").removeClass("active");
$(event.target).parent().addClass("active");
})
self.init_svg("#modal_chart");
self.url_options = self.data($(event.target))
self.draw(self.url_options)
});
},
init_svg: function(chart_div) {
var self = this;
self.margin = {top: 20, right: 80, bottom: 30, left: 50};
self.width = 550 - self.margin.left - self.margin.right;
self.height = 300 - self.margin.top - self.margin.bottom;
self.svg = d3.select(chart_div)
.append("svg")
.attr("width", self.width + self.margin.left + self.margin.right)
.attr("height", self.height + self.margin.top + self.margin.bottom)
.append("g")
.attr("transform", "translate(" + self.margin.left + "," + self.margin.top + ")");
self.x = d3.time.scale().range([0, self.width]);
self.y = d3.scale.linear().range([self.height, 0]);
self.xAxis = d3.svg.axis()
.scale(self.x)
.orient("bottom").ticks(6);
self.yAxis = d3.svg.axis()
.scale(self.y)
.orient("left");
self.parse_date = d3.time.format("%Y-%m-%dT%H:%M:%S.%L").parse;
self.line = d3.svg.line().interpolate("linear")
.x(function(d) { return self.x(d.date); })
.y(function(d) { return self.y(d.value); });
self.color = d3.scale.category10();
},
draw: function(url_options) {
var self = this;
var url_options = url_options || {};
url_options.interval = url_options.interval || "1w";
d3.json(self.json_url(url_options), function(error, data) {
data.forEach(function(d) { d.date = self.parse_date(d.date); });
self.color.domain(d3.keys(data[0]).filter(function(key) { return key !== 'date'; }));
var usage_values = self.color.domain().map(function(name) {
return {
name: name,
values: data.map(function(d) {
return {date: d.date, value: d[name]};
})
};
});
self.svg.selectAll(".axis").remove();
self.x.domain(d3.extent(data, function(d) { return d.date; }));
self.y.domain([0, 15]);
self.svg.append("g")
.attr("transform", "translate(0," + self.height + ")")
.attr("class", "axis")
.call(self.xAxis);
self.svg.append("g")
.attr("class", "axis")
.call(self.yAxis)
var usages = self.svg.selectAll(".usage")
.data(usage_values, function(d) { return self.key(d) });
var usage = usages.enter().append("g")
.attr("class", "usage");
usage.append("path")
.attr("d", function(d) { return self.line(d.values); })
.style("stroke", function(d) { return self.color(d.name); })
.style("fill", "none")
.style("stroke-width", 3);
var legend = usage.append('g')
.attr('class', 'legend');
legend.append('rect')
.attr('x', self.width - 60)
.attr('y', function(d, i){ return (i * 20) + 30 ;})
.attr('width', 10)
.attr('height', 10)
.style('fill', function(d) { return self.color(d.name); });
legend.append('text')
.attr('x', self.width - 40)
.attr('y', function(d, i){ return (i * 20) + 39;})
.text(function(d){ return d.name.replace(/_/g, " "); });
usages.exit().remove();
});
},
data: function(element) {
return {
url: $(element).data("url"),
series: $(element).data("series")
};
},
json_url: function(url_options) {
var options = $.extend({}, url_options);
var url = options.url
delete options.url
return url + '?' + $.param(options);
},
key: function(data){
return data.name + data.values.length + data.values[0].date + data.values[data.values.length-1].date
},
};
horizon.addInitFunction(function () {
horizon.d3_line_chart.init();
});
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