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|
nv.models.ohlcBar = function() {
"use strict";
//============================================================
// Public Variables with Default Settings
//------------------------------------------------------------
var margin = {top: 0, right: 0, bottom: 0, left: 0}
, width = 960
, height = 500
, id = Math.floor(Math.random() * 10000) //Create semi-unique ID in case user doesn't select one
, x = d3.scale.linear()
, y = d3.scale.linear()
, getX = function(d) { return d.x }
, getY = function(d) { return d.y }
, getOpen = function(d) { return d.open }
, getClose = function(d) { return d.close }
, getHigh = function(d) { return d.high }
, getLow = function(d) { return d.low }
, forceX = []
, forceY = []
, padData = false // If true, adds half a data points width to front and back, for lining up a line chart with a bar chart
, clipEdge = true
, color = nv.utils.defaultColor()
, xDomain
, yDomain
, xRange
, yRange
, dispatch = d3.dispatch('chartClick', 'elementClick', 'elementDblClick', 'elementMouseover', 'elementMouseout')
;
//============================================================
//============================================================
// Private Variables
//------------------------------------------------------------
//TODO: store old scales for transitions
//============================================================
function chart(selection) {
selection.each(function(data) {
var availableWidth = width - margin.left - margin.right,
availableHeight = height - margin.top - margin.bottom,
container = d3.select(this);
//------------------------------------------------------------
// Setup Scales
x .domain(xDomain || d3.extent(data[0].values.map(getX).concat(forceX) ));
if (padData)
x.range(xRange || [availableWidth * .5 / data[0].values.length, availableWidth * (data[0].values.length - .5) / data[0].values.length ]);
else
x.range(xRange || [0, availableWidth]);
y .domain(yDomain || [
d3.min(data[0].values.map(getLow).concat(forceY)),
d3.max(data[0].values.map(getHigh).concat(forceY))
])
.range(yRange || [availableHeight, 0]);
// If scale's domain don't have a range, slightly adjust to make one... so a chart can show a single data point
if (x.domain()[0] === x.domain()[1])
x.domain()[0] ?
x.domain([x.domain()[0] - x.domain()[0] * 0.01, x.domain()[1] + x.domain()[1] * 0.01])
: x.domain([-1,1]);
if (y.domain()[0] === y.domain()[1])
y.domain()[0] ?
y.domain([y.domain()[0] + y.domain()[0] * 0.01, y.domain()[1] - y.domain()[1] * 0.01])
: y.domain([-1,1]);
//------------------------------------------------------------
//------------------------------------------------------------
// Setup containers and skeleton of chart
var wrap = d3.select(this).selectAll('g.nv-wrap.nv-ohlcBar').data([data[0].values]);
var wrapEnter = wrap.enter().append('g').attr('class', 'nvd3 nv-wrap nv-ohlcBar');
var defsEnter = wrapEnter.append('defs');
var gEnter = wrapEnter.append('g');
var g = wrap.select('g');
gEnter.append('g').attr('class', 'nv-ticks');
wrap.attr('transform', 'translate(' + margin.left + ',' + margin.top + ')');
//------------------------------------------------------------
container
.on('click', function(d,i) {
dispatch.chartClick({
data: d,
index: i,
pos: d3.event,
id: id
});
});
defsEnter.append('clipPath')
.attr('id', 'nv-chart-clip-path-' + id)
.append('rect');
wrap.select('#nv-chart-clip-path-' + id + ' rect')
.attr('width', availableWidth)
.attr('height', availableHeight);
g .attr('clip-path', clipEdge ? 'url(#nv-chart-clip-path-' + id + ')' : '');
var ticks = wrap.select('.nv-ticks').selectAll('.nv-tick')
.data(function(d) { return d });
ticks.exit().remove();
var ticksEnter = ticks.enter().append('path')
.attr('class', function(d,i,j) { return (getOpen(d,i) > getClose(d,i) ? 'nv-tick negative' : 'nv-tick positive') + ' nv-tick-' + j + '-' + i })
.attr('d', function(d,i) {
var w = (availableWidth / data[0].values.length) * .9;
return 'm0,0l0,'
+ (y(getOpen(d,i))
- y(getHigh(d,i)))
+ 'l'
+ (-w/2)
+ ',0l'
+ (w/2)
+ ',0l0,'
+ (y(getLow(d,i)) - y(getOpen(d,i)))
+ 'l0,'
+ (y(getClose(d,i))
- y(getLow(d,i)))
+ 'l'
+ (w/2)
+ ',0l'
+ (-w/2)
+ ',0z';
})
.attr('transform', function(d,i) { return 'translate(' + x(getX(d,i)) + ',' + y(getHigh(d,i)) + ')'; })
//.attr('fill', function(d,i) { return color[0]; })
//.attr('stroke', function(d,i) { return color[0]; })
//.attr('x', 0 )
//.attr('y', function(d,i) { return y(Math.max(0, getY(d,i))) })
//.attr('height', function(d,i) { return Math.abs(y(getY(d,i)) - y(0)) })
.on('mouseover', function(d,i) {
d3.select(this).classed('hover', true);
dispatch.elementMouseover({
point: d,
series: data[0],
pos: [x(getX(d,i)), y(getY(d,i))], // TODO: Figure out why the value appears to be shifted
pointIndex: i,
seriesIndex: 0,
e: d3.event
});
})
.on('mouseout', function(d,i) {
d3.select(this).classed('hover', false);
dispatch.elementMouseout({
point: d,
series: data[0],
pointIndex: i,
seriesIndex: 0,
e: d3.event
});
})
.on('click', function(d,i) {
dispatch.elementClick({
//label: d[label],
value: getY(d,i),
data: d,
index: i,
pos: [x(getX(d,i)), y(getY(d,i))],
e: d3.event,
id: id
});
d3.event.stopPropagation();
})
.on('dblclick', function(d,i) {
dispatch.elementDblClick({
//label: d[label],
value: getY(d,i),
data: d,
index: i,
pos: [x(getX(d,i)), y(getY(d,i))],
e: d3.event,
id: id
});
d3.event.stopPropagation();
});
ticks
.attr('class', function(d,i,j) { return (getOpen(d,i) > getClose(d,i) ? 'nv-tick negative' : 'nv-tick positive') + ' nv-tick-' + j + '-' + i })
d3.transition(ticks)
.attr('transform', function(d,i) { return 'translate(' + x(getX(d,i)) + ',' + y(getHigh(d,i)) + ')'; })
.attr('d', function(d,i) {
var w = (availableWidth / data[0].values.length) * .9;
return 'm0,0l0,'
+ (y(getOpen(d,i))
- y(getHigh(d,i)))
+ 'l'
+ (-w/2)
+ ',0l'
+ (w/2)
+ ',0l0,'
+ (y(getLow(d,i))
- y(getOpen(d,i)))
+ 'l0,'
+ (y(getClose(d,i))
- y(getLow(d,i)))
+ 'l'
+ (w/2)
+ ',0l'
+ (-w/2)
+ ',0z';
})
//.attr('width', (availableWidth / data[0].values.length) * .9 )
//d3.transition(ticks)
//.attr('y', function(d,i) { return y(Math.max(0, getY(d,i))) })
//.attr('height', function(d,i) { return Math.abs(y(getY(d,i)) - y(0)) });
//.order(); // not sure if this makes any sense for this model
});
return chart;
}
//============================================================
// Expose Public Variables
//------------------------------------------------------------
chart.dispatch = dispatch;
chart.options = nv.utils.optionsFunc.bind(chart);
chart.x = function(_) {
if (!arguments.length) return getX;
getX = _;
return chart;
};
chart.y = function(_) {
if (!arguments.length) return getY;
getY = _;
return chart;
};
chart.open = function(_) {
if (!arguments.length) return getOpen;
getOpen = _;
return chart;
};
chart.close = function(_) {
if (!arguments.length) return getClose;
getClose = _;
return chart;
};
chart.high = function(_) {
if (!arguments.length) return getHigh;
getHigh = _;
return chart;
};
chart.low = function(_) {
if (!arguments.length) return getLow;
getLow = _;
return 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.xScale = function(_) {
if (!arguments.length) return x;
x = _;
return chart;
};
chart.yScale = function(_) {
if (!arguments.length) return y;
y = _;
return chart;
};
chart.xDomain = function(_) {
if (!arguments.length) return xDomain;
xDomain = _;
return chart;
};
chart.yDomain = function(_) {
if (!arguments.length) return yDomain;
yDomain = _;
return chart;
};
chart.xRange = function(_) {
if (!arguments.length) return xRange;
xRange = _;
return chart;
};
chart.yRange = function(_) {
if (!arguments.length) return yRange;
yRange = _;
return chart;
};
chart.forceX = function(_) {
if (!arguments.length) return forceX;
forceX = _;
return chart;
};
chart.forceY = function(_) {
if (!arguments.length) return forceY;
forceY = _;
return chart;
};
chart.padData = function(_) {
if (!arguments.length) return padData;
padData = _;
return chart;
};
chart.clipEdge = function(_) {
if (!arguments.length) return clipEdge;
clipEdge = _;
return chart;
};
chart.color = function(_) {
if (!arguments.length) return color;
color = nv.utils.getColor(_);
return chart;
};
chart.id = function(_) {
if (!arguments.length) return id;
id = _;
return chart;
};
//============================================================
return chart;
}
|
