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nv.models.line = function() {
"use strict";
//Default Settings
var margin = {top: 0, right: 0, bottom: 0, left: 0},
width = 960,
height = 500,
color = nv.utils.defaultColor(), // function that returns colors
id = Math.floor(Math.random() * 10000), //Create semi-unique ID incase user doesn't select one
getX = function(d) { return d.x }, // accessor to get the x value from a data point
getY = function(d) { return d.y }, // accessor to get the y value from a data point
clipEdge = false, // if true, masks lines within x and y scale
interpolate = "linear"; // controls the line interpolation
var scatter = nv.models.scatter()
.id(id)
.size(16) // default size
.sizeDomain([16,256]), //set to speed up calculation, needs to be unset if there is a custom size accessor
//x = scatter.xScale(),
//y = scatter.yScale(),
x, y,
x0, y0, timeoutID;
function chart(selection) {
selection.each(function(data) {
var availableWidth = width - margin.left - margin.right,
availableHeight = height - margin.top - margin.bottom;
//get the scales inscase scatter scale was set manually
x = x || scatter.xScale();
y = y || scatter.yScale();
//store old scales if they exist
x0 = x0 || x;
y0 = y0 || y;
var wrap = d3.select(this).selectAll('g.nv-wrap.nv-line').data([data]);
var wrapEnter = wrap.enter().append('g').attr('class', 'nvd3 nv-wrap nv-line');
var defsEnter = wrapEnter.append('defs');
var gEnter = wrapEnter.append('g');
var g = wrap.select('g')
wrapEnter.append('g').attr('class', 'nv-scatterWrap');
var scatterWrap = wrap.select('.nv-scatterWrap').datum(data);
gEnter.append('g').attr('class', 'nv-groups');
scatter
.width(availableWidth)
.height(availableHeight)
d3.transition(scatterWrap).call(scatter);
wrap.attr('transform', 'translate(' + margin.left + ',' + margin.top + ')');
defsEnter.append('clipPath')
.attr('id', 'nv-edge-clip-' + id)
.append('rect');
wrap.select('#nv-edge-clip-' + id + ' rect')
.attr('width', availableWidth)
.attr('height', availableHeight);
g .attr('clip-path', clipEdge ? 'url(#nv-edge-clip-' + id + ')' : '');
scatterWrap
.attr('clip-path', clipEdge ? 'url(#nv-edge-clip-' + id + ')' : '');
var groups = wrap.select('.nv-groups').selectAll('.nv-group')
.data(function(d) { return d }, function(d) { return d.key });
groups.enter().append('g')
.style('stroke-opacity', 1e-6)
.style('fill-opacity', 1e-6);
d3.transition(groups.exit())
.style('stroke-opacity', 1e-6)
.style('fill-opacity', 1e-6)
.remove();
groups
.attr('class', function(d,i) { return 'nv-group nv-series-' + i })
.classed('hover', function(d) { return d.hover })
.style('fill', function(d,i){ return color(d, i) })
.style('stroke', function(d,i){ return color(d, i) })
d3.transition(groups)
.style('stroke-opacity', 1)
.style('fill-opacity', .5)
var paths = groups.selectAll('path')
.data(function(d, i) { return [d.values] });
paths.enter().append('path')
.attr('class', 'nv-line')
.attr('d', d3.svg.line()
.interpolate(interpolate)
.x(function(d,i) { return x0(getX(d,i)) })
.y(function(d,i) { return y0(getY(d,i)) })
);
d3.transition(groups.exit().selectAll('path'))
.attr('d', d3.svg.line()
.interpolate(interpolate)
.x(function(d,i) { return x(getX(d,i)) })
.y(function(d,i) { return y(getY(d,i)) })
)
.remove(); // redundant? line is already being removed
d3.transition(paths)
.attr('d', d3.svg.line()
.interpolate(interpolate)
.x(function(d,i) { return x(getX(d,i)) })
.y(function(d,i) { return y(getY(d,i)) })
);
//store old scales for use in transitions on update, to animate from old to new positions
x0 = x.copy();
y0 = y.copy();
});
return chart;
}
chart.dispatch = scatter.dispatch;
d3.rebind(chart, scatter, 'interactive', 'size', 'xScale', 'yScale', 'zScale', 'xDomain', 'yDomain', 'xRange', 'yRange', 'sizeDomain', 'forceX', 'forceY', 'forceSize', 'clipVoronoi', 'clipRadius');
chart.options = nv.utils.optionsFunc.bind(chart);
chart.margin = function(_) {
if (!arguments.length) return margin;
margin = _;
return chart;
};
chart.width = function(_) {
if (!arguments.length) return width;
width = _;
return chart;
};
chart.height = function(_) {
if (!arguments.length) return height;
height = _;
return chart;
};
chart.x = function(_) {
if (!arguments.length) return getX;
getX = _;
scatter.x(_);
return chart;
};
chart.y = function(_) {
if (!arguments.length) return getY;
getY = _;
scatter.y(_);
return chart;
};
chart.clipEdge = function(_) {
if (!arguments.length) return clipEdge;
clipEdge = _;
return chart;
};
chart.color = function(_) {
if (!arguments.length) return color;
color = nv.utils.getColor(_);
scatter.color(color);
return chart;
};
chart.id = function(_) {
if (!arguments.length) return id;
id = _;
return chart;
};
chart.interpolate = function(_) {
if (!arguments.length) return interpolate;
interpolate = _;
return chart;
};
chart.defined = function(_) {
if (!arguments.length) return defined;
defined = _;
return chart;
};
return chart;
}
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