nvd3-fork
Version:
FORK! of NVD3, a reusable charting library written in d3.js
284 lines (235 loc) • 10.3 kB
JavaScript
nv.models.discreteBarChart = function() {
"use strict";
//============================================================
// Public Variables with Default Settings
//------------------------------------------------------------
var discretebar = nv.models.discreteBar()
, xAxis = nv.models.axis()
, yAxis = nv.models.axis()
, legend = nv.models.legend()
, tooltip = nv.models.tooltip()
;
var margin = {top: 15, right: 10, bottom: 50, left: 60}
, marginTop = null
, width = null
, height = null
, color = nv.utils.getColor()
, showLegend = false
, showXAxis = true
, showYAxis = true
, rightAlignYAxis = false
, staggerLabels = false
, wrapLabels = false
, rotateLabels = 0
, x
, y
, noData = null
, dispatch = d3.dispatch('beforeUpdate','renderEnd')
, duration = 250
;
xAxis
.orient('bottom')
.showMaxMin(false)
.tickFormat(function(d) { return d })
;
yAxis
.orient((rightAlignYAxis) ? 'right' : 'left')
.tickFormat(d3.format(',.1f'))
;
tooltip
.duration(0)
.headerEnabled(false)
.valueFormatter(function(d, i) {
return yAxis.tickFormat()(d, i);
})
.keyFormatter(function(d, i) {
return xAxis.tickFormat()(d, i);
});
//============================================================
// Private Variables
//------------------------------------------------------------
var renderWatch = nv.utils.renderWatch(dispatch, duration);
function chart(selection) {
renderWatch.reset();
renderWatch.models(discretebar);
if (showXAxis) renderWatch.models(xAxis);
if (showYAxis) renderWatch.models(yAxis);
selection.each(function(data) {
var container = d3.select(this),
that = this;
nv.utils.initSVG(container);
var availableWidth = nv.utils.availableWidth(width, container, margin),
availableHeight = nv.utils.availableHeight(height, container, margin);
chart.update = function() {
dispatch.beforeUpdate();
container.transition().duration(duration).call(chart);
};
chart.container = this;
// Display No Data message if there's nothing to show.
if (!data || !data.length || !data.filter(function(d) { return d.values.length }).length) {
nv.utils.noData(chart, container);
return chart;
} else {
container.selectAll('.nv-noData').remove();
}
// Setup Scales
x = discretebar.xScale();
y = discretebar.yScale().clamp(true);
// Setup containers and skeleton of chart
var wrap = container.selectAll('g.nv-wrap.nv-discreteBarWithAxes').data([data]);
var gEnter = wrap.enter().append('g').attr('class', 'nvd3 nv-wrap nv-discreteBarWithAxes').append('g');
var defsEnter = gEnter.append('defs');
var g = wrap.select('g');
gEnter.append('g').attr('class', 'nv-x nv-axis');
gEnter.append('g').attr('class', 'nv-y nv-axis')
.append('g').attr('class', 'nv-zeroLine')
.append('line');
gEnter.append('g').attr('class', 'nv-barsWrap');
gEnter.append('g').attr('class', 'nv-legendWrap');
g.attr('transform', 'translate(' + margin.left + ',' + margin.top + ')');
// Legend
if (!showLegend) {
g.select('.nv-legendWrap').selectAll('*').remove();
} else {
legend.width(availableWidth);
g.select('.nv-legendWrap')
.datum(data)
.call(legend);
if (!marginTop && legend.height() !== margin.top) {
margin.top = legend.height();
availableHeight = nv.utils.availableHeight(height, container, margin);
}
wrap.select('.nv-legendWrap')
.attr('transform', 'translate(0,' + (-margin.top) +')')
}
if (rightAlignYAxis) {
g.select(".nv-y.nv-axis")
.attr("transform", "translate(" + availableWidth + ",0)");
}
// Main Chart Component(s)
discretebar
.width(availableWidth)
.height(availableHeight);
var barsWrap = g.select('.nv-barsWrap')
.datum(data.filter(function(d) { return !d.disabled }));
barsWrap.transition().call(discretebar);
defsEnter.append('clipPath')
.attr('id', 'nv-x-label-clip-' + discretebar.id())
.append('rect');
g.select('#nv-x-label-clip-' + discretebar.id() + ' rect')
.attr('width', x.rangeBand() * (staggerLabels ? 2 : 1))
.attr('height', 16)
.attr('x', -x.rangeBand() / (staggerLabels ? 1 : 2 ));
// Setup Axes
if (showXAxis) {
xAxis
.scale(x)
._ticks( nv.utils.calcTicksX(availableWidth/100, data) )
.tickSize(-availableHeight, 0);
g.select('.nv-x.nv-axis')
.attr('transform', 'translate(0,' + (y.range()[0] + ((discretebar.showValues() && y.domain()[0] < 0) ? 16 : 0)) + ')');
g.select('.nv-x.nv-axis').call(xAxis);
var xTicks = g.select('.nv-x.nv-axis').selectAll('g');
if (staggerLabels) {
xTicks
.selectAll('text')
.attr('transform', function(d,i,j) { return 'translate(0,' + (j % 2 == 0 ? '5' : '17') + ')' })
}
if (rotateLabels) {
xTicks
.selectAll('.tick text')
.attr('transform', 'rotate(' + rotateLabels + ' 0,0)')
.style('text-anchor', rotateLabels > 0 ? 'start' : 'end');
}
if (wrapLabels) {
g.selectAll('.tick text')
.call(nv.utils.wrapTicks, chart.xAxis.rangeBand())
}
}
if (showYAxis) {
yAxis
.scale(y)
._ticks( nv.utils.calcTicksY(availableHeight/36, data, discretebar.y()) )
.tickSize( -availableWidth, 0);
g.select('.nv-y.nv-axis').call(yAxis);
}
// Zero line
g.select(".nv-zeroLine line")
.attr("x1",0)
.attr("x2",(rightAlignYAxis) ? -availableWidth : availableWidth)
.attr("y1", y(0))
.attr("y2", y(0))
;
});
renderWatch.renderEnd('discreteBar chart immediate');
return chart;
}
//============================================================
// Event Handling/Dispatching (out of chart's scope)
//------------------------------------------------------------
discretebar.dispatch.on('elementMouseover.tooltip', function(evt) {
evt['series'] = {
key: chart.x()(evt.data),
value: chart.y()(evt.data),
color: evt.color
};
tooltip.data(evt).hidden(false);
});
discretebar.dispatch.on('elementMouseout.tooltip', function(evt) {
tooltip.hidden(true);
});
discretebar.dispatch.on('elementMousemove.tooltip', function(evt) {
tooltip();
});
//============================================================
// Expose Public Variables
//------------------------------------------------------------
chart.dispatch = dispatch;
chart.discretebar = discretebar;
chart.legend = legend;
chart.xAxis = xAxis;
chart.yAxis = yAxis;
chart.tooltip = tooltip;
chart.options = nv.utils.optionsFunc.bind(chart);
chart._options = Object.create({}, {
// simple options, just get/set the necessary values
width: {get: function(){return width;}, set: function(_){width=_;}},
height: {get: function(){return height;}, set: function(_){height=_;}},
showLegend: {get: function(){return showLegend;}, set: function(_){showLegend=_;}},
staggerLabels: {get: function(){return staggerLabels;}, set: function(_){staggerLabels=_;}},
rotateLabels: {get: function(){return rotateLabels;}, set: function(_){rotateLabels=_;}},
wrapLabels: {get: function(){return wrapLabels;}, set: function(_){wrapLabels=!!_;}},
showXAxis: {get: function(){return showXAxis;}, set: function(_){showXAxis=_;}},
showYAxis: {get: function(){return showYAxis;}, set: function(_){showYAxis=_;}},
noData: {get: function(){return noData;}, set: function(_){noData=_;}},
// options that require extra logic in the setter
margin: {get: function(){return margin;}, set: function(_){
if (_.top !== undefined) {
margin.top = _.top;
marginTop = _.top;
}
margin.right = _.right !== undefined ? _.right : margin.right;
margin.bottom = _.bottom !== undefined ? _.bottom : margin.bottom;
margin.left = _.left !== undefined ? _.left : margin.left;
}},
duration: {get: function(){return duration;}, set: function(_){
duration = _;
renderWatch.reset(duration);
discretebar.duration(duration);
xAxis.duration(duration);
yAxis.duration(duration);
}},
color: {get: function(){return color;}, set: function(_){
color = nv.utils.getColor(_);
discretebar.color(color);
legend.color(color);
}},
rightAlignYAxis: {get: function(){return rightAlignYAxis;}, set: function(_){
rightAlignYAxis = _;
yAxis.orient( (_) ? 'right' : 'left');
}}
});
nv.utils.inheritOptions(chart, discretebar);
nv.utils.initOptions(chart);
return chart;
}