nv.models.stackedAreaChart = function() {
"use strict";
//============================================================
// Public Variables with Default Settings
//------------------------------------------------------------
var stacked = nv.models.stackedArea()
, xAxis = nv.models.axis()
, yAxis = nv.models.axis()
, legend = nv.models.legend()
, controls = nv.models.legend()
, interactiveLayer = nv.interactiveGuideline()
;
var margin = {top: 30, right: 25, bottom: 50, left: 60}
, width = null
, height = null
, color = nv.utils.defaultColor() // a function that takes in d, i and returns color
, showControls = true
, showLegend = true
, showXAxis = true
, showYAxis = true
, rightAlignYAxis = false
, useInteractiveGuideline = false
, tooltips = true
, tooltip = function(key, x, y, e, graph) {
return '<h3>' + key + '</h3>' +
'<p>' + y + ' on ' + x + '</p>'
}
, x //can be accessed via chart.xScale()
, y //can be accessed via chart.yScale()
, yAxisTickFormat = d3.format(',.2f')
, state = { style: stacked.style() }
, defaultState = null
, noData = 'No Data Available.'
, dispatch = d3.dispatch('tooltipShow', 'tooltipHide', 'stateChange', 'changeState')
, controlWidth = 250
, cData = ['Stacked','Stream','Expanded']
, controlLabels = {}
, transitionDuration = 250
;
xAxis
.orient('bottom')
.tickPadding(7)
;
yAxis
.orient((rightAlignYAxis) ? 'right' : 'left')
;
controls.updateState(false);
//============================================================
//============================================================
// Private Variables
//------------------------------------------------------------
var showTooltip = function(e, offsetElement) {
var left = e.pos[0] + ( offsetElement.offsetLeft || 0 ),
top = e.pos[1] + ( offsetElement.offsetTop || 0),
x = xAxis.tickFormat()(stacked.x()(e.point, e.pointIndex)),
y = yAxis.tickFormat()(stacked.y()(e.point, e.pointIndex)),
content = tooltip(e.series.key, x, y, e, chart);
nv.tooltip.show([left, top], content, e.value < 0 ? 'n' : 's', null, offsetElement);
};
//============================================================
function chart(selection) {
selection.each(function(data) {
var container = d3.select(this),
that = this;
var availableWidth = (width || parseInt(container.style('width')) || 960)
- margin.left - margin.right,
availableHeight = (height || parseInt(container.style('height')) || 400)
- margin.top - margin.bottom;
chart.update = function() { container.transition().duration(transitionDuration).call(chart); };
chart.container = this;
//set state.disabled
state.disabled = data.map(function(d) { return !!d.disabled });
if (!defaultState) {
var key;
defaultState = {};
for (key in state) {
if (state[key] instanceof Array)
defaultState[key] = state[key].slice(0);
else
defaultState[key] = state[key];
}
}
//------------------------------------------------------------
// Display No Data message if there's nothing to show.
if (!data || !data.length || !data.filter(function(d) { return d.values.length }).length) {
var noDataText = container.selectAll('.nv-noData').data([noData]);
noDataText.enter().append('text')
.attr('class', 'nvd3 nv-noData')
.attr('dy', '-.7em')
.style('text-anchor', 'middle');
noDataText
.attr('x', margin.left + availableWidth / 2)
.attr('y', margin.top + availableHeight / 2)
.text(function(d) { return d });
return chart;
} else {
container.selectAll('.nv-noData').remove();
}
//------------------------------------------------------------
//------------------------------------------------------------
// Setup Scales
x = stacked.xScale();
y = stacked.yScale();
//------------------------------------------------------------
//------------------------------------------------------------
// Setup containers and skeleton of chart
var wrap = container.selectAll('g.nv-wrap.nv-stackedAreaChart').data([data]);
var gEnter = wrap.enter().append('g').attr('class', 'nvd3 nv-wrap nv-stackedAreaChart').append('g');
var g = wrap.select('g');
gEnter.append("rect").style("opacity",0);
gEnter.append('g').attr('class', 'nv-x nv-axis');
gEnter.append('g').attr('class', 'nv-y nv-axis');
gEnter.append('g').attr('class', 'nv-stackedWrap');
gEnter.append('g').attr('class', 'nv-legendWrap');
gEnter.append('g').attr('class', 'nv-controlsWrap');
gEnter.append('g').attr('class', 'nv-interactive');
g.select("rect").attr("width",availableWidth).attr("height",availableHeight);
//------------------------------------------------------------
// Legend
if (showLegend) {
var legendWidth = (showControls) ? availableWidth - controlWidth : availableWidth;
legend
.width(legendWidth);
g.select('.nv-legendWrap')
.datum(data)
.call(legend);
if ( margin.top != legend.height()) {
margin.top = legend.height();
availableHeight = (height || parseInt(container.style('height')) || 400)
- margin.top - margin.bottom;
}
g.select('.nv-legendWrap')
.attr('transform', 'translate(' + (availableWidth-legendWidth) + ',' + (-margin.top) +')');
}
//------------------------------------------------------------
//------------------------------------------------------------
// Controls
if (showControls) {
var controlsData = [
{
key: controlLabels.stacked || 'Stacked',
metaKey: 'Stacked',
disabled: stacked.style() != 'stack',
style: 'stack'
},
{
key: controlLabels.stream || 'Stream',
metaKey: 'Stream',
disabled: stacked.style() != 'stream',
style: 'stream'
},
{
key: controlLabels.expanded || 'Expanded',
metaKey: 'Expanded',
disabled: stacked.style() != 'expand',
style: 'expand'
},
{
key: controlLabels.stack_percent || 'Stack %',
metaKey: 'Stack_Percent',
disabled: stacked.style() != 'stack_percent',
style: 'stack_percent'
}
];
controlWidth = (cData.length/3) * 260;
controlsData = controlsData.filter(function(d) {
return cData.indexOf(d.metaKey) !== -1;
})
controls
.width( controlWidth )
.color(['#444', '#444', '#444']);
g.select('.nv-controlsWrap')
.datum(controlsData)
.call(controls);
if ( margin.top != Math.max(controls.height(), legend.height()) ) {
margin.top = Math.max(controls.height(), legend.height());
availableHeight = (height || parseInt(container.style('height')) || 400)
- margin.top - margin.bottom;
}
g.select('.nv-controlsWrap')
.attr('transform', 'translate(0,' + (-margin.top) +')');
}
//------------------------------------------------------------
wrap.attr('transform', 'translate(' + margin.left + ',' + margin.top + ')');
if (rightAlignYAxis) {
g.select(".nv-y.nv-axis")
.attr("transform", "translate(" + availableWidth + ",0)");
}
//------------------------------------------------------------
// Main Chart Component(s)
//------------------------------------------------------------
//Set up interactive layer
if (useInteractiveGuideline) {
interactiveLayer
.width(availableWidth)
.height(availableHeight)
.margin({left: margin.left, top: margin.top})
.svgContainer(container)
.xScale(x);
wrap.select(".nv-interactive").call(interactiveLayer);
}
stacked
.width(availableWidth)
.height(availableHeight)
var stackedWrap = g.select('.nv-stackedWrap')
.datum(data);
stackedWrap.transition().call(stacked);
//------------------------------------------------------------
//------------------------------------------------------------
// Setup Axes
if (showXAxis) {
xAxis
.scale(x)
.ticks( availableWidth / 100 )
.tickSize( -availableHeight, 0);
g.select('.nv-x.nv-axis')
.attr('transform', 'translate(0,' + availableHeight + ')');
g.select('.nv-x.nv-axis')
.transition().duration(0)
.call(xAxis);
}
if (showYAxis) {
yAxis
.scale(y)
.ticks(stacked.offset() == 'wiggle' ? 0 : availableHeight / 36)
.tickSize(-availableWidth, 0)
.setTickFormat( (stacked.style() == 'expand' || stacked.style() == 'stack_percent')
? d3.format('%') : yAxisTickFormat);
g.select('.nv-y.nv-axis')
.transition().duration(0)
.call(yAxis);
}
//------------------------------------------------------------
//============================================================
// Event Handling/Dispatching (in chart's scope)
//------------------------------------------------------------
stacked.dispatch.on('areaClick.toggle', function(e) {
if (data.filter(function(d) { return !d.disabled }).length === 1)
data.forEach(function(d) {
d.disabled = false;
});
else
data.forEach(function(d,i) {
d.disabled = (i != e.seriesIndex);
});
state.disabled = data.map(function(d) { return !!d.disabled });
dispatch.stateChange(state);
chart.update();
});
legend.dispatch.on('stateChange', function(newState) {
state.disabled = newState.disabled;
dispatch.stateChange(state);
chart.update();
});
controls.dispatch.on('legendClick', function(d,i) {
if (!d.disabled) return;
controlsData = controlsData.map(function(s) {
s.disabled = true;
return s;
});
d.disabled = false;
stacked.style(d.style);
state.style = stacked.style();
dispatch.stateChange(state);
chart.update();
});
interactiveLayer.dispatch.on('elementMousemove', function(e) {
stacked.clearHighlights();
var singlePoint, pointIndex, pointXLocation, allData = [];
data
.filter(function(series, i) {
series.seriesIndex = i;
return !series.disabled;
})
.forEach(function(series,i) {
pointIndex = nv.interactiveBisect(series.values, e.pointXValue, chart.x());
stacked.highlightPoint(i, pointIndex, true);
var point = series.values[pointIndex];
if (typeof point === 'undefined') return;
if (typeof singlePoint === 'undefined') singlePoint = point;
if (typeof pointXLocation === 'undefined') pointXLocation = chart.xScale()(chart.x()(point,pointIndex));
//If we are in 'expand' mode, use the stacked percent value instead of raw value.
var tooltipValue = (stacked.style() == 'expand') ? point.display.y : chart.y()(point,pointIndex);
allData.push({
key: series.key,
value: tooltipValue,
color: color(series,series.seriesIndex),
stackedValue: point.display
});
});
allData.reverse();
//Highlight the tooltip entry based on which stack the mouse is closest to.
if (allData.length > 2) {
var yValue = chart.yScale().invert(e.mouseY);
var yDistMax = Infinity, indexToHighlight = null;
allData.forEach(function(series,i) {
//To handle situation where the stacked area chart is negative, we need to use absolute values
//when checking if the mouse Y value is within the stack area.
yValue = Math.abs(yValue);
var stackedY0 = Math.abs(series.stackedValue.y0);
var stackedY = Math.abs(series.stackedValue.y);
if ( yValue >= stackedY0 && yValue <= (stackedY + stackedY0))
{
indexToHighlight = i;
return;
}
});
if (indexToHighlight != null)
allData[indexToHighlight].highlight = true;
}
var xValue = xAxis.tickFormat()(chart.x()(singlePoint,pointIndex));
//If we are in 'expand' mode, force the format to be a percentage.
var valueFormatter = (stacked.style() == 'expand') ?
function(d,i) {return d3.format(".1%")(d);} :
function(d,i) {return yAxis.tickFormat()(d); };
interactiveLayer.tooltip
.position({left: pointXLocation + margin.left, top: e.mouseY + margin.top})
.chartContainer(that.parentNode)
.enabled(tooltips)
.valueFormatter(valueFormatter)
.data(
{
value: xValue,
series: allData
}
)();
interactiveLayer.renderGuideLine(pointXLocation);
});
interactiveLayer.dispatch.on("elementMouseout",function(e) {
dispatch.tooltipHide();
stacked.clearHighlights();
});
dispatch.on('tooltipShow', function(e) {
if (tooltips) showTooltip(e, that.parentNode);
});
// Update chart from a state object passed to event handler
dispatch.on('changeState', function(e) {
if (typeof e.disabled !== 'undefined' && data.length === e.disabled.length) {
data.forEach(function(series,i) {
series.disabled = e.disabled[i];
});
state.disabled = e.disabled;
}
if (typeof e.style !== 'undefined') {
stacked.style(e.style);
}
chart.update();
});
});
return chart;
}
//============================================================
// Event Handling/Dispatching (out of chart's scope)
//------------------------------------------------------------
stacked.dispatch.on('tooltipShow', function(e) {
//disable tooltips when value ~= 0
//// TODO: consider removing points from voronoi that have 0 value instead of this hack
/*
if (!Math.round(stacked.y()(e.point) * 100)) { // 100 will not be good for very small numbers... will have to think about making this valu dynamic, based on data range
setTimeout(function() { d3.selectAll('.point.hover').classed('hover', false) }, 0);
return false;
}
*/
e.pos = [e.pos[0] + margin.left, e.pos[1] + margin.top],
dispatch.tooltipShow(e);
});
stacked.dispatch.on('tooltipHide', function(e) {
dispatch.tooltipHide(e);
});
dispatch.on('tooltipHide', function() {
if (tooltips) nv.tooltip.cleanup();
});
//============================================================
//============================================================
// Expose Public Variables
//------------------------------------------------------------
// expose chart's sub-components
chart.dispatch = dispatch;
chart.stacked = stacked;
chart.legend = legend;
chart.controls = controls;
chart.xAxis = xAxis;
chart.yAxis = yAxis;
chart.interactiveLayer = interactiveLayer;
d3.rebind(chart, stacked, 'x', 'y', 'size', 'xScale', 'yScale', 'xDomain', 'yDomain', 'xRange', 'yRange', 'sizeDomain', 'interactive', 'useVoronoi', 'offset', 'order', 'style', 'clipEdge', 'forceX', 'forceY', 'forceSize', 'interpolate');
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.color = function(_) {
if (!arguments.length) return color;
color = nv.utils.getColor(_);
legend.color(color);
stacked.color(color);
return chart;
};
chart.showControls = function(_) {
if (!arguments.length) return showControls;
showControls = _;
return chart;
};
chart.showLegend = function(_) {
if (!arguments.length) return showLegend;
showLegend = _;
return chart;
};
chart.showXAxis = function(_) {
if (!arguments.length) return showXAxis;
showXAxis = _;
return chart;
};
chart.showYAxis = function(_) {
if (!arguments.length) return showYAxis;
showYAxis = _;
return chart;
};
chart.rightAlignYAxis = function(_) {
if(!arguments.length) return rightAlignYAxis;
rightAlignYAxis = _;
yAxis.orient( (_) ? 'right' : 'left');
return chart;
};
chart.useInteractiveGuideline = function(_) {
if(!arguments.length) return useInteractiveGuideline;
useInteractiveGuideline = _;
if (_ === true) {
chart.interactive(false);
chart.useVoronoi(false);
}
return chart;
};
chart.tooltip = function(_) {
if (!arguments.length) return tooltip;
tooltip = _;
return chart;
};
chart.tooltips = function(_) {
if (!arguments.length) return tooltips;
tooltips = _;
return chart;
};
chart.tooltipContent = function(_) {
if (!arguments.length) return tooltip;
tooltip = _;
return chart;
};
chart.state = function(_) {
if (!arguments.length) return state;
state = _;
return chart;
};
chart.defaultState = function(_) {
if (!arguments.length) return defaultState;
defaultState = _;
return chart;
};
chart.noData = function(_) {
if (!arguments.length) return noData;
noData = _;
return chart;
};
chart.transitionDuration = function(_) {
if (!arguments.length) return transitionDuration;
transitionDuration = _;
return chart;
};
chart.controlsData = function(_) {
if (!arguments.length) return cData;
cData = _;
return chart;
};
chart.controlLabels = function(_) {
if (!arguments.length) return controlLabels;
if (typeof _ !== 'object') return controlLabels;
controlLabels = _;
return chart;
};
yAxis.setTickFormat = yAxis.tickFormat;
yAxis.tickFormat = function(_) {
if (!arguments.length) return yAxisTickFormat;
yAxisTickFormat = _;
return yAxis;
};
//============================================================
return chart;
}