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/***
* This chart treats the X position as the INDEX, not the value
* Each series at the same index MUST be the same x value for a valid representation
* This is needed specifically for daily data where the gap between Friday and Monday
* should be equal to the gap from Monday to Tuesday. (and of course, holidays can be
* omitted without issue, as long as ALL series omit the same days).
* An intentional side effect is that ALL ticks will land on actual data points,
* so this visualization can also be used for Month End data points, showing Month End
* ticks on the X axis
***/
nv.charts.stackedAreaChart = function() {
var selector = null,
data = [],
duration = 500,
tooltip = function(key, x, y, e, graph) {
return '<h3>' + key + '</h3>' +
'<p>' + y + ' at ' + x + '</p>'
};
var graph = nv.models.stackedAreaWithLegend()
.x(function(d,i) { return i }),
showTooltip = function(e) {
var offsetElement = document.getElementById(selector.substr(1)),
left = e.pos[0] + offsetElement.offsetLeft,
top = e.pos[1] + offsetElement.offsetTop,
formatX = graph.xAxis.tickFormat(),
formatY = graph.yAxis.tickFormat(),
x = formatX(graph.x()(e, e.pointIndex)),
//x = formatX(graph.x()(e.point)),
y = formatY(graph.y()(e.point)),
content = tooltip(e.series.key, x, y, e, graph);
nv.tooltip.show([left, top], content);
};
//setting component defaults
//graph.xAxis.tickFormat(d3.format(',r'));
graph.xAxis.tickFormat(function(d) {
//return d3.time.format('%x')(new Date(d))
//log(d, data[0].values[d]);
return d3.time.format('%x')(new Date(data[0].values[d].x))
});
//graph.yAxis.tickFormat(d3.format(',.2f'));
graph.yAxis.tickFormat(d3.format(',.2%'));
//TODO: consider a method more similar to how the models are built
function chart() {
if (!selector || !data.length) return chart; //do nothing if you have nothing to work with
d3.select(selector).select('svg')
.datum(data)
.transition().duration(duration)
.call(graph); //consider using transition chaining like in the models
return chart;
}
// This should always only be called once, then update should be used after,
// in which case should consider the 'd3 way' and merge this with update,
// but simply do this on enter... should try anoter example that way
chart.build = function() {
if (!selector || !data.length) return chart; //do nothing if you have nothing to work with
nv.addGraph({
generate: function() {
var container = d3.select(selector),
width = function() { return parseInt(container.style('width')) },
height = function() { return parseInt(container.style('height')) },
svg = container.append('svg');
graph
.width(width)
.height(height);
svg
.attr('width', width())
.attr('height', height())
.datum(data)
.transition().duration(duration)
.call(graph);
return graph;
},
callback: function(graph) {
graph.dispatch.on('tooltipShow', showTooltip);
graph.dispatch.on('tooltipHide', nv.tooltip.cleanup);
//TODO: create resize queue and have nv core handle resize instead of binding all to window resize
window.onresize =
function() {
// now that width and height are functions, should be automatic..of course you can always override them
d3.select(selector + ' svg')
.attr('width', graph.width()()) //need to set SVG dimensions, chart is not aware of the SVG component
.attr('height', graph.height()())
.call(graph);
};
}
});
return chart;
};
/*
// moved to chart()
chart.update = function() {
if (!selector || !data.length) return chart; //do nothing if you have nothing to work with
d3.select(selector).select('svg')
.datum(data)
.transition().duration(duration).call(graph);
return chart;
};
*/
chart.data = function(_) {
if (!arguments.length) return data;
data = _;
return chart;
};
chart.selector = function(_) {
if (!arguments.length) return selector;
selector = _;
return chart;
};
chart.duration = function(_) {
if (!arguments.length) return duration;
duration = _;
return chart;
};
chart.tooltip = function(_) {
if (!arguments.length) return tooltip;
tooltip = _;
return chart;
};
chart.xTickFormat = function(_) {
if (!arguments.length) return graph.xAxis.tickFormat();
graph.xAxis.tickFormat(typeof _ === 'function' ? _ : d3.format(_));
return chart;
};
chart.yTickFormat = function(_) {
if (!arguments.length) return graph.yAxis.tickFormat();
graph.yAxis.tickFormat(typeof _ === 'function' ? _ : d3.format(_));
return chart;
};
chart.xAxisLabel = function(_) {
if (!arguments.length) return graph.xAxis.axisLabel();
graph.xAxis.axisLabel(_);
return chart;
};
chart.yAxisLabel = function(_) {
if (!arguments.length) return graph.yAxis.axisLabel();
graph.yAxis.axisLabel(_);
return chart;
};
d3.rebind(chart, graph, 'x', 'y');
chart.graph = graph; // Give direct access for getter/setters, and dispatchers
return chart;
};