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simple2d.js
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simple2d.js
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/* global $, _ */
(function(kcharts, $, _) {
/* global $, d3*/
"use strict";
kcharts.Simple2D = function() {
var that=this, params = this.params = {},
margin = params.margin = {top: 30, right: 30, bottom: 30, left: 30};
// params.width = 500 - margin.left - margin.right;
// params.height = 500 - margin.top - margin.bottom;
params.width = 500;
params.height = 500;
params.xDomain = null;
params.yDomain = null;
params.timeIndex = null;
params.data = null;
params.xLabel = 'x';
params.yLabel = 'y';
params.showHeatmapFlag = true;
params.showLinePathFlag = true;
params.COLS = ['red', 'green', 'blue'];
// SETUP SCALES AND AXES
var x = d3.scale.linear(),
y = d3.scale.linear(),
xAxis = d3.svg.axis().scale(x).orient("bottom"),
yAxis = d3.svg.axis().scale(y).orient("left"),
// OUR SINGLE LINE
X = function(d) {return x(+d.x);},
Y = function(d) {return y(+d.y);},
line = d3.svg.line().x(X).y(Y),
// heatmap
heatmap = new kcharts.HeatMap().xScale(x).yScale(y).radius(0.02);
var chart = function(selection) {
selection.each(function(data) {
var g, height = chart.height(), width = chart.width(), margin = chart.margin();
chart.svg = d3.select(this)
.attr('width', width)
.attr('height', height)
.selectAll('g').data([data]);
// MAKE CHART ELEMENTS IF NEC
var gEnter = chart.svg.enter().append('g');
gEnter.append("g").attr("class", "x axis");
gEnter.append("g").attr("class", "y axis");
gEnter.append("g").attr("class", "axes-labels");
gEnter.append("g").attr("class", "lines");
// gEnter.append("path").attr("class", "line");
gEnter.append("g").attr("class", "time-markers");
// genter.append("text").attr("class", "x-label");
// gEnter.append("text").attr("class", "y-label");
// UPDATE DOMAINS
x.domain(chart.xDomain() || kcharts.getDataExtent(data, 'x'))
.range([0, width - margin.left - margin.right]);
y.domain(chart.yDomain() || kcharts.getDataExtent(data, 'y'))
.range([height - margin.top - margin.bottom, 0]);
// UPDATE DIMENSIONS
// chart.svg
// .attr("width", width)
// .attr("height", height + margin.top + margin.bottom);
g = chart.svg
.attr("transform", "translate(" + margin.left + "," + margin.top + ")")
.attr("class", "chart-area")
.attr("width", width - margin.left - margin.right)
.attr("height", height - margin.top - margin.bottom);
;
// UPDATE THE AXES
g.select('.x.axis')
.attr("transform", "translate(0," + y.range()[0] + ")")
.transition().duration(1000).call(xAxis);
g.select('.y.axis').transition().duration(1000).call(yAxis);
// UPDATE LABELS
g.data([{'xText':chart.xLabel(), 'yText':chart.yLabel()}]).call(kcharts.axesLabels);
// UPDATE THE LINE
if(chart.showLinePathFlag()){
var lEnter = g.select('.lines').selectAll('path').data(data).enter();
lEnter.append("path").attr('stroke', chart.colors);
g.selectAll('.lines path').attr('d', line);
}
// UPDATE HEATMAP
if(chart.showHeatmapFlag()){
d3.select(this).call(heatmap);
}
// UPDATE THE TIME-MARKER
var tEnter = g.select('.time-markers')
.selectAll('.time-marker').data(data).enter();
tEnter.append('circle').attr('class', 'time-marker').attr('fill', chart.colors);
g.selectAll('.time-markers .time-marker')
.attr('cx', function(d) {
return parseInt(x(d[d.length-1].x), 10);
})
.attr('cy', function(d) {
return parseInt(y(d[d.length-1].y), 10);
})
.attr('r', 5)
;
});
};
var method;
for(method in this.params){
chart[method] = makeAPIMethod(chart, this, method);
}
chart.margins = function(_) {
if(!arguments.length){
return that.params.margins;
}
$.extend(that.params.margins, _);
return chart;
};
chart.xScale = function() {
return x;
};
chart.yScale = function() {
return y;
};
chart.colors = function(d, i) {
return chart.COLS()[i%chart.COLS().length];
};
return chart;
};
var makeAPIMethod = function(chart, that, method) {
return function(_){
if(!arguments.length){
return that.params[method];
}
that.params[method] = _;
return chart;
};
};
kcharts.getDataExtent = function(data, col){
return d3.extent(data.map(function(d) {
return +d[col];
}));
};
kcharts.parentData = function(d) {
return [d];
};
kcharts.axesLabels = function(selection) {
selection.each(function(data){
// var gEnter, g = d3.select(this), svg = d3.select(g.property("nearestViewportElement")),
var gEnter, svg = d3.select(this),
width = svg.attr('width'),
height = svg.attr('height'),
axesLabels = svg.select('.axes-labels');
gEnter = axesLabels.selectAll('.x.label').data(kcharts.parentData).enter();
gEnter.append("text")
.attr("class", "x label")
.attr("text-anchor", "end");
svg.selectAll('.x.label')
.attr("x", width)
.attr("y", height - 6)
.text(function(d) {
return d.xText;
});
// And the y-axis label like this:
gEnter = axesLabels.selectAll('.y.label').data(kcharts.parentData).enter();
gEnter.append("text")
.attr('class', 'y label')
.attr("y", 6)
.attr("dy", ".75em")
.attr("transform", "rotate(-90)")
.attr("text-anchor", "end")
;
svg.selectAll('.y.label')
.text(function(d) {
return d.yText;
});
});
};
}(window.kcharts = window.kcharts || {}, $));