nv.models.pie = function() {
"use strict";
//============================================================
// Public Variables with Default Settings
//------------------------------------------------------------
var margin = {top: 0, right: 0, bottom: 0, left: 0}
, width = 500
, height = 500
, getX = function(d) { return d.x }
, getY = function(d) { return d.y }
, getDescription = function(d) { return d.description }
, id = Math.floor(Math.random() * 10000) //Create semi-unique ID in case user doesn't select one
, color = nv.utils.defaultColor()
, valueFormat = d3.format(',.2f')
, labelFormat = d3.format('%')
, showLabels = true
, pieLabelsOutside = true
, donutLabelsOutside = false
, labelType = "key"
, labelThreshold = .02 //if slice percentage is under this, don't show label
, donut = false
, labelSunbeamLayout = false
, startAngle = false
, endAngle = false
, donutRatio = 0.5
, dispatch = d3.dispatch('chartClick', 'elementClick', 'elementDblClick', 'elementMouseover', 'elementMouseout')
;
//============================================================
function chart(selection) {
selection.each(function(data) {
var availableWidth = width - margin.left - margin.right,
availableHeight = height - margin.top - margin.bottom,
radius = Math.min(availableWidth, availableHeight) / 2,
arcRadius = radius-(radius / 5),
container = d3.select(this);
//------------------------------------------------------------
// Setup containers and skeleton of chart
//var wrap = container.selectAll('.nv-wrap.nv-pie').data([data]);
var wrap = container.selectAll('.nv-wrap.nv-pie').data(data);
var wrapEnter = wrap.enter().append('g').attr('class','nvd3 nv-wrap nv-pie nv-chart-' + id);
var gEnter = wrapEnter.append('g');
var g = wrap.select('g');
gEnter.append('g').attr('class', 'nv-pie');
gEnter.append('g').attr('class', 'nv-pieLabels');
wrap.attr('transform', 'translate(' + margin.left + ',' + margin.top + ')');
g.select('.nv-pie').attr('transform', 'translate(' + availableWidth / 2 + ',' + availableHeight / 2 + ')');
g.select('.nv-pieLabels').attr('transform', 'translate(' + availableWidth / 2 + ',' + availableHeight / 2 + ')');
//------------------------------------------------------------
container
.on('click', function(d,i) {
dispatch.chartClick({
data: d,
index: i,
pos: d3.event,
id: id
});
});
var arc = d3.svg.arc()
.outerRadius(arcRadius);
if (startAngle) arc.startAngle(startAngle)
if (endAngle) arc.endAngle(endAngle);
if (donut) arc.innerRadius(radius * donutRatio);
// Setup the Pie chart and choose the data element
var pie = d3.layout.pie()
.sort(null)
.value(function(d) { return d.disabled ? 0 : getY(d) });
var slices = wrap.select('.nv-pie').selectAll('.nv-slice')
.data(pie);
var pieLabels = wrap.select('.nv-pieLabels').selectAll('.nv-label')
.data(pie);
slices.exit().remove();
pieLabels.exit().remove();
var ae = slices.enter().append('g')
.attr('class', 'nv-slice')
.on('mouseover', function(d,i){
d3.select(this).classed('hover', true);
dispatch.elementMouseover({
label: getX(d.data),
value: getY(d.data),
point: d.data,
pointIndex: i,
pos: [d3.event.pageX, d3.event.pageY],
id: id
});
})
.on('mouseout', function(d,i){
d3.select(this).classed('hover', false);
dispatch.elementMouseout({
label: getX(d.data),
value: getY(d.data),
point: d.data,
index: i,
id: id
});
})
.on('click', function(d,i) {
dispatch.elementClick({
label: getX(d.data),
value: getY(d.data),
point: d.data,
index: i,
pos: d3.event,
id: id
});
d3.event.stopPropagation();
})
.on('dblclick', function(d,i) {
dispatch.elementDblClick({
label: getX(d.data),
value: getY(d.data),
point: d.data,
index: i,
pos: d3.event,
id: id
});
d3.event.stopPropagation();
});
slices
.attr('fill', function(d,i) { return color(d, i); })
.attr('stroke', function(d,i) { return color(d, i); });
var paths = ae.append('path')
.each(function(d) { this._current = d; });
//.attr('d', arc);
slices.select('path')
.transition()
.attr('d', arc)
.attrTween('d', arcTween);
if (showLabels) {
// This does the normal label
var labelsArc = d3.svg.arc().innerRadius(0);
if (pieLabelsOutside){ labelsArc = arc; }
if (donutLabelsOutside) { labelsArc = d3.svg.arc().outerRadius(arc.outerRadius()); }
pieLabels.enter().append("g").classed("nv-label",true)
.each(function(d,i) {
var group = d3.select(this);
group
.attr('transform', function(d) {
if (labelSunbeamLayout) {
d.outerRadius = arcRadius + 10; // Set Outer Coordinate
d.innerRadius = arcRadius + 15; // Set Inner Coordinate
var rotateAngle = (d.startAngle + d.endAngle) / 2 * (180 / Math.PI);
if ((d.startAngle+d.endAngle)/2 < Math.PI) {
rotateAngle -= 90;
} else {
rotateAngle += 90;
}
return 'translate(' + labelsArc.centroid(d) + ') rotate(' + rotateAngle + ')';
} else {
d.outerRadius = radius + 10; // Set Outer Coordinate
d.innerRadius = radius + 15; // Set Inner Coordinate
return 'translate(' + labelsArc.centroid(d) + ')'
}
});
group.append('rect')
.style('stroke', '#fff')
.style('fill', '#fff')
.attr("rx", 3)
.attr("ry", 3);
group.append('text')
.style('text-anchor', labelSunbeamLayout ? ((d.startAngle + d.endAngle) / 2 < Math.PI ? 'start' : 'end') : 'middle') //center the text on it's origin or begin/end if orthogonal aligned
.style('fill', '#000')
});
var labelLocationHash = {};
var avgHeight = 14;
var avgWidth = 140;
var createHashKey = function(coordinates) {
return Math.floor(coordinates[0]/avgWidth) * avgWidth + ',' + Math.floor(coordinates[1]/avgHeight) * avgHeight;
};
pieLabels.transition()
.attr('transform', function(d) {
if (labelSunbeamLayout) {
d.outerRadius = arcRadius + 10; // Set Outer Coordinate
d.innerRadius = arcRadius + 15; // Set Inner Coordinate
var rotateAngle = (d.startAngle + d.endAngle) / 2 * (180 / Math.PI);
if ((d.startAngle+d.endAngle)/2 < Math.PI) {
rotateAngle -= 90;
} else {
rotateAngle += 90;
}
return 'translate(' + labelsArc.centroid(d) + ') rotate(' + rotateAngle + ')';
} else {
d.outerRadius = radius + 10; // Set Outer Coordinate
d.innerRadius = radius + 15; // Set Inner Coordinate
/*
Overlapping pie labels are not good. What this attempts to do is, prevent overlapping.
Each label location is hashed, and if a hash collision occurs, we assume an overlap.
Adjust the label's y-position to remove the overlap.
*/
var center = labelsArc.centroid(d);
if(d.value){
var hashKey = createHashKey(center);
if (labelLocationHash[hashKey]) {
center[1] -= avgHeight;
}
labelLocationHash[createHashKey(center)] = true;
}
return 'translate(' + center + ')'
}
});
pieLabels.select(".nv-label text")
.style('text-anchor', labelSunbeamLayout ? ((d.startAngle + d.endAngle) / 2 < Math.PI ? 'start' : 'end') : 'middle') //center the text on it's origin or begin/end if orthogonal aligned
.text(function(d, i) {
var percent = (d.endAngle - d.startAngle) / (2 * Math.PI);
var labelTypes = {
"key" : getX(d.data),
"value": getY(d.data),
"percent": labelFormat(percent)
};
return (d.value && percent > labelThreshold) ? labelTypes[labelType] : '';
});
}
// Computes the angle of an arc, converting from radians to degrees.
function angle(d) {
var a = (d.startAngle + d.endAngle) * 90 / Math.PI - 90;
return a > 90 ? a - 180 : a;
}
function arcTween(a) {
a.endAngle = isNaN(a.endAngle) ? 0 : a.endAngle;
a.startAngle = isNaN(a.startAngle) ? 0 : a.startAngle;
if (!donut) a.innerRadius = 0;
var i = d3.interpolate(this._current, a);
this._current = i(0);
return function(t) {
return arc(i(t));
};
}
function tweenPie(b) {
b.innerRadius = 0;
var i = d3.interpolate({startAngle: 0, endAngle: 0}, b);
return function(t) {
return arc(i(t));
};
}
});
return chart;
}
//============================================================
// Expose Public Variables
//------------------------------------------------------------
chart.dispatch = dispatch;
chart.options = nv.utils.optionsFunc.bind(chart);
chart.margin = function(_) {
if (!arguments.length) return margin;
margin.top = typeof _.top != 'undefined' ? _.top : margin.top;
margin.right = typeof _.right != 'undefined' ? _.right : margin.right;
margin.bottom = typeof _.bottom != 'undefined' ? _.bottom : margin.bottom;
margin.left = typeof _.left != 'undefined' ? _.left : margin.left;
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.values = function(_) {
nv.log("pie.values() is no longer supported.");
return chart;
};
chart.x = function(_) {
if (!arguments.length) return getX;
getX = _;
return chart;
};
chart.y = function(_) {
if (!arguments.length) return getY;
getY = d3.functor(_);
return chart;
};
chart.description = function(_) {
if (!arguments.length) return getDescription;
getDescription = _;
return chart;
};
chart.showLabels = function(_) {
if (!arguments.length) return showLabels;
showLabels = _;
return chart;
};
chart.labelSunbeamLayout = function(_) {
if (!arguments.length) return labelSunbeamLayout;
labelSunbeamLayout = _;
return chart;
};
chart.donutLabelsOutside = function(_) {
if (!arguments.length) return donutLabelsOutside;
donutLabelsOutside = _;
return chart;
};
chart.pieLabelsOutside = function(_) {
if (!arguments.length) return pieLabelsOutside;
pieLabelsOutside = _;
return chart;
};
chart.labelType = function(_) {
if (!arguments.length) return labelType;
labelType = _;
labelType = labelType || "key";
return chart;
};
chart.donut = function(_) {
if (!arguments.length) return donut;
donut = _;
return chart;
};
chart.donutRatio = function(_) {
if (!arguments.length) return donutRatio;
donutRatio = _;
return chart;
};
chart.startAngle = function(_) {
if (!arguments.length) return startAngle;
startAngle = _;
return chart;
};
chart.endAngle = function(_) {
if (!arguments.length) return endAngle;
endAngle = _;
return chart;
};
chart.id = function(_) {
if (!arguments.length) return id;
id = _;
return chart;
};
chart.color = function(_) {
if (!arguments.length) return color;
color = nv.utils.getColor(_);
return chart;
};
chart.valueFormat = function(_) {
if (!arguments.length) return valueFormat;
valueFormat = _;
return chart;
};
chart.labelFormat = function(_) {
if (!arguments.length) return labelFormat;
labelFormat = _;
return chart;
};
chart.labelThreshold = function(_) {
if (!arguments.length) return labelThreshold;
labelThreshold = _;
return chart;
};
//============================================================
return chart;
}