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(function ($) {
function trans (left, top) {
return 'translate(' + left + ', ' + top + ')';
}
var defaults = function () {
return {
height: 140,
color: '#1f77b4',
interpolate: 'basis',
endDate: moment().format('YYYY-MM-DD'),
marginLeft: 1,
marginRight: 1,
marginTop: 18,
marginBottom: 1
};
};
/*
* data = [
* { val: '2015-01-30', count: 30 },
* ...
* ]
*/
$.fn.barchart = function (data) {
$(this).each(function () {
var options = _.defaults($(this).data(), defaults());
_.extend(options, {
width: $(this).width(),
endDate: moment(options.endDate)
});
var container = d3.select(this),
svg = container.append('svg')
.attr('width', options.width + 2)
.attr('height', options.height + 2)
.classed('sonar-d3', true),
plot = svg.append('g')
.classed('plot', true),
xScale = d3.scale.ordinal()
.domain(data.map(function (d, i) {
return i;
})),
yScaleMax = d3.max(data, function (d) {
return d.count;
}),
yScale = d3.scale.linear()
.domain([0, yScaleMax]);
_.extend(options, {
availableWidth: options.width - options.marginLeft - options.marginRight,
availableHeight: options.height - options.marginTop - options.marginBottom
});
plot.attr('transform', trans(options.marginLeft, options.marginTop));
xScale.rangeRoundBands([0, options.availableWidth], 0.05, 0);
yScale.range([3, options.availableHeight]);
var barWidth = xScale.rangeBand(),
bars = plot.selectAll('g').data(data);
if (barWidth > 0) {
var barsEnter = bars.enter()
.append('g')
.attr('transform', function (d, i) {
return trans(xScale(i), Math.ceil(options.availableHeight - yScale(d.count)));
});
barsEnter.append('rect')
.style('fill', options.color)
.attr('width', barWidth)
.attr('height', function (d) {
return Math.floor(yScale(d.count));
})
.style('cursor', 'pointer')
.attr('data-period-start', function (d) {
return moment(d.val).format('YYYY-MM-DD');
})
.attr('data-period-end', function (d, i) {
var beginning = moment(d.val),
ending = i < data.length - 1 ? moment(data[i + 1].val).subtract(1, 'days') : options.endDate,
isSameDay = ending.diff(beginning, 'days') <= 1;
if (isSameDay) {
ending.add(1, 'days');
}
return ending.format('YYYY-MM-DD');
})
.attr('title', function (d, i) {
var beginning = moment(d.val),
ending = i < data.length - 1 ? moment(data[i + 1].val).subtract(1, 'days') : options.endDate,
isSameDay = ending.diff(beginning, 'days') <= 1;
return d.count + '<br>' + beginning.format('LL') + (isSameDay ? '' : (' – ' + ending.format('LL')));
})
.attr('data-placement', 'right')
.attr('data-toggle', 'tooltip');
var maxValue = d3.max(data, function (d) {
return d.count;
}),
isValueShown = false;
barsEnter.append('text')
.classed('subtitle', true)
.attr('transform', trans(barWidth / 2, -4))
.style('text-anchor', 'middle')
.text(function (d) {
var text = !isValueShown && d.count === maxValue ? d.count : '';
isValueShown = d.count === maxValue;
return text;
});
$(this).find('[data-toggle=tooltip]').tooltip({ container: 'body', html: true });
}
});
};
})(window.jQuery);
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