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boxwhisker.js
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boxwhisker.js
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BoxWhisker = function(ctx){
if (ctx.width === undefined){ throw Error('No width given.'); }
this.w = ctx.width;
if (ctx.height === undefined){ throw Error('No height given.'); }
this.h = ctx.height;
if (ctx.node === undefined){ throw Error('No Node given'); }
this.node = ctx.node;
this.line = ctx.line || {};
this.line.color = this.line.color || '#e00';
this.bar = ctx.bar || {};
this.bar.width = this.bar.width || 50;
this.bar.margin = this.bar.margin || 20;
this.legend = ctx.legend || {};
this.legend.enabled = this.legend.enabled === undefined ? false : this.legend.enabled;
this.duration = ctx.duration || 1000;
if (ctx.data !== undefined && ctx.data !== null){
this.update_data(ctx.data);
}
};
BoxWhisker.prototype = {
update_data: function(data){
if (data.length === undefined || data.length === 0) { return; }
this.data = data;
var l= this.data.length;
// Check to see if the bar width is too big, if it is reduce the width of the bar
if ( l * this.bar.width + (l - 1) * this.bar.margin > this.w - this.bar.width){
this.bar.width = (this.w - (l - 1) * this.bar.margin) / (l + 2);
}
this.bar.start = 25;
this.bar.end = this.w;
var me = this;
var old = d3.selectAll(this.node).select('.bw-chart');
if (old.empty()){
this.vis = d3.select(this.node).append('g')
.attr('class','bw-chart')
.attr("width", this.w)
.attr("height", this.h);
var gradient = this.vis.append("svg:defs")
.append("svg:linearGradient")
.attr("id", "gradient")
.attr("x1", "0%")
.attr("y1", "0%")
.attr("x2", "0%")
.attr("y2", "100%")
.attr("spreadMethod", "pad");
gradient.append("svg:stop")
.attr("offset", "0%")
.attr("stop-color", "#fff")
.attr("stop-opacity", 1);
gradient.append("svg:stop")
.attr("offset", "100%")
.attr("stop-color", "#e6e7e8")
.attr("stop-opacity", 1);
d3.select(this.node).append('g')
.attr('class','bw-line-g')
.attr("width", this.w)
.attr("height", this.h);
}else {
this.vis = d3.select(this.node).select('g.bw-chart');
}
this.line_g = d3.select(this.node).select('g.bw-line-g') ;
var y = d3.scale.linear()
.domain([100, 0])
.rangeRound([20, this.h * 0.8]);
var x = d3.scale.linear()
.domain([0, l])
.range([this.bar.start, this.bar.end, this.bar.width]);
var gradients = this.vis.selectAll('rect.gradients').data(this.data);
gradients.enter().append('rect')
.attr('fill', 'url(#gradient)')
.attr('class', 'gradients')
.attr('x', function(d, i){ return x(i) - 25;})
.attr('width', function(d, i){ return me.bar.width + 60; })
.transition().duration(this.duration)
.attr('x', function(d, i){ return x(i) - 25;})
.attr('width', function(d, i){ return me.bar.width + 60; })
.attr('y', function(d, i){ return y(100) - 5;})
.attr('height', function(d, i){ return y(0) + 5;});
gradients.transition()
.duration(this.duration / 2)
.attr('width', function(d, i){ return me.bar.width + 60; })
.attr('x', function(d, i){ return x(i) - 25;})
.attr('width', function(d, i){ return me.bar.width + 60; })
.attr('y', function(d, i){ return y(100) - 5;})
.attr('height', function(d, i){ return y(0) + 5;});
gradients.exit().transition().attr('width',0).remove();
var line_mid = this.vis.selectAll('line.bw-line-mid').data(this.data);
line_mid.enter().append('line')
.attr('class', function(d, i){ return 'bw-line bw-line-mid bw-group-' + i;})
.attr('x1', function(d, i){ return x(i) + me.bar.width / 2; })
.attr('x2', function(d, i){ return x(i) + me.bar.width / 2; })
.attr('y2', function(d, i){ return y(d.max.value);})
.attr('y1', function(d, i){ return y(d.max.value);})
.transition().duration(this.duration)
.attr('y1', function(d, i){ return y(d.min.value);})
;
line_mid.transition().duration(this.duration / 2)
.attr('x1', function(d, i){ return x(i) + me.bar.width / 2; })
.attr('x2', function(d, i){ return x(i) + me.bar.width / 2; })
.attr('y1', function(d, i){ return y(d.min.value);})
.attr('y2', function(d, i){ return y(d.max.value);});
line_mid.exit().remove();
var rects_lower = this.vis.selectAll('rect.bw-lower').data(this.data);
rects_lower.enter().append('rect')
.attr('x', function(d, i){ return x(i); })
.attr('class', function(d, i) { return 'bw-rect bw-lower bw-group-' + i; })
.attr('x', function(d, i){ return x(i); })
.attr('width', function(d, i){ return me.bar.width; })
.attr('y', function(d, i){ return y(d.q2);})
.transition().duration(this.duration)
.attr('height', function(d, i){ return y(d.q1) - y(d.q2) ;});
rects_lower.transition().duration(this.duration / 2)
.attr('x', function(d, i){ return x(i); })
.attr('width', function(d, i){ return me.bar.width; })
.attr('y', function(d, i){ return y(d.q2);})
.attr('height', function(d, i){ return y(d.q1) - y(d.q2) ;});
rects_lower.exit().remove();
var rects_higher = this.vis.selectAll('rect.bw-upper').data(this.data);
rects_higher.enter().append('rect')
.attr('x', function(d, i){ return x(i); })
.attr('class', function(d, i) { return 'bw-rect bw-upper bw-group-' + i; })
.attr('width', function(d, i){ return me.bar.width; })
.attr('y', function(d, i){ return y(d.q3);})
.transition().duration(this.duration)
.attr('height', function(d, i){ return y(d.q2) - y(d.q3);})
.style('opacity', 1);
rects_higher.transition().duration(this.duration / 2)
.attr('x', function(d, i){ return x(i); })
.attr('width', function(d, i){ return me.bar.width; })
.attr('y', function(d, i){ return y(d.q3);})
.attr('height', function(d, i){ return y(d.q2) - y(d.q3);});
rects_higher.exit().remove();
var line_max = this.vis.selectAll('line.bw-line-max').data(this.data);
line_max.enter().append('line')
.attr('class', function(d, i){ return 'bw-line bw-line-max bw-group-' + i;})
.style('opacity', 0)
.attr('y1', function(d, i){ return y(d.max.value);})
.attr('x2', function(d, i) { return x(i) + me.bar.width;})
.attr('x1', function(d, i){ return x(i);})
.attr('y1', function(d, i){ return y(d.max.value);})
.attr('y2', function(d, i){ return y(d.max.value);})
.transition().duration(this.duration)
.style('opacity', 1);
line_max.transition().duration(this.duration / 2)
.style('opacity', 1)
.attr('y1', function(d, i){ return y(d.max.value);})
.attr('x2', function(d, i) { return x(i) + me.bar.width;})
.attr('x1', function(d, i){ return x(i);})
.attr('y1', function(d, i){ return y(d.max.value);})
.attr('y2', function(d, i){ return y(d.max.value);});
line_max.exit().remove();
var line_min = this.vis.selectAll('line.bw-line-min').data(this.data);
line_min.enter().append('line')
.style('opacity', 0)
.attr('x1', function(d, i){ return x(i);})
.attr('x2', function(d, i) { return x(i) + me.bar.width;})
.attr('y1', function(d, i){ return y(d.min.value);})
.attr('y2', function(d, i){ return y(d.min.value);})
.attr('class', function(d, i){ return 'bw-line bw-line-min bw-group-' + i;})
.transition().duration(this.duration)
.style('opacity', 1);
line_min.transition().duration(this.duration / 2)
.style('opacity', 1)
.attr('x1', function(d, i){ return x(i);})
.attr('x2', function(d, i){ return x(i) + me.bar.width;})
.attr('y1', function(d, i){ return y(d.min.value);})
.attr('y2', function(d, i){ return y(d.min.value);});
line_min.exit().remove();
var text_max = this.vis.selectAll('text.bw-text-max').data(this.data);
text_max.enter().append('text')
.attr('x', function(d, i){ return x(i) + me.bar.width /2 ;})
.attr('dy', '-0.75em')
.attr('text-anchor', 'middle')
.attr('y', function(d, i){ return y(d.max.value);})
.attr('class', function(d, i){ return 'bw-text bw-text-max bw-group-' + i;})
.text( function(d,i) { return d.max.label; });
text_max.exit().remove();
text_max.transition().duration(this.duration / 2)
.attr('x', function(d, i){ return x(i) + me.bar.width / 2;})
.attr('dy', '-0.75em')
.attr('text-anchor', 'middle')
.attr('y', function(d, i){ return y(d.max.value);})
.text( function(d,i) { return d.max.label; });
var text_min = this.vis.selectAll('text.bw-text-min').data(this.data);
text_min.enter().append('text')
.attr('x', function(d, i){ return x(i) + me.bar.width / 2;})
.attr('dy', '1.5em')
.attr('text-anchor', 'middle')
.attr('y', function(d, i){ return y(d.min.value);})
.attr('class', function(d, i){ return 'bw-text bw-text-min bw-group-' + i;})
.text( function(d,i) { return d.min.label; });
text_min.transition().duration(this.duration / 2)
.attr('x', function(d, i){ return x(i) + me.bar.width / 2;})
.attr('dy', '1.5em')
.attr('text-anchor', 'middle')
.text( function(d,i) { return d.min.label; })
.attr('y', function(d, i){ return y(d.min.value);});
text_min.exit().remove();
var text_label = this.vis.selectAll('text.bw-text-label').data(this.data);
text_label.enter().append('text')
.attr('x', function(d, i){ return x(i) + me.bar.width / 2;})
.attr('dx', '')
.attr('text-anchor', 'middle')
.attr('dy', '4em')
.attr('y', function(d, i){ return y(0); })
.attr('class', function(d, i){ return 'bw-text bw-text-label bw-group-' + i;})
.text( function(d,i) { return d.name; });
text_label.transition().duration(this.duration / 2)
.attr('x', function(d, i){ return x(i) + me.bar.width / 2;})
.attr('dx', '')
.attr('text-anchor', 'middle')
.attr('dy', '4em')
.attr('y', function(d, i){ return y(0); })
.text( function(d,i) { return d.name; });
text_label.exit().remove();
if (this.line.percent !== undefined){
this.line.constant = this.line.percent * this.max;
}
if (this.line.average !== undefined){
for (var j =0; j < data.length; j++){
this.total += data[j].value;
}
var avg = this.total / data.length;
this.line.constant = avg;
}
if (this.line.constant !== undefined){
var const_line = this.line_g.selectAll('line');
//const_line.remove();
const_line = const_line.data([this.line.constant]);
const_line.enter().append('line')
.attr('x1', -30)
.attr('y1', function(d) { return y(d) ; })
.attr('y2', function(d) { return y(d) ; })
.attr('class', 'bw-constant-line')
.attr('stroke-dasharray', '3')
.attr('stroke-width', '2')
.attr('stroke', this.line.color)
.attr('x2', this.w * 0.95);
const_line.transition().duration(this.duration)
.attr('y1', function(d) { return y(d) ; })
.attr('x2', this.w * 0.95)
.attr('y2', function(d) { return y(d) ; });
}else {
this.line_g.selectAll('line').remove();
}
}
};