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/* *
* (c) 2010-2019 Torstein Honsi
*
* License: www.highcharts.com/license
*/
'use strict';
import H from '../parts/Globals.js';
import '../parts/Utilities.js';
import '../parts/Pointer.js';
import '../parts/Series.js';
import '../parts/Pointer.js';
// Extensions for polar charts. Additionally, much of the geometry required for
// polar charts is gathered in RadialAxes.js.
var pick = H.pick,
Pointer = H.Pointer,
Series = H.Series,
seriesTypes = H.seriesTypes,
wrap = H.wrap,
seriesProto = Series.prototype,
pointerProto = Pointer.prototype,
colProto;
/**
* Search a k-d tree by the point angle, used for shared tooltips in polar
* charts
*/
seriesProto.searchPointByAngle = function (e) {
var series = this,
chart = series.chart,
xAxis = series.xAxis,
center = xAxis.pane.center,
plotX = e.chartX - center[0] - chart.plotLeft,
plotY = e.chartY - center[1] - chart.plotTop;
return this.searchKDTree({
clientX: 180 + (Math.atan2(plotX, plotY) * (-180 / Math.PI))
});
};
/**
* #6212 Calculate connectors for spline series in polar chart.
* @param {boolean} calculateNeighbours
* Check if connectors should be calculated for neighbour points as
* well allows short recurence
*/
seriesProto.getConnectors = function (
segment,
index,
calculateNeighbours,
connectEnds
) {
var i,
prevPointInd,
nextPointInd,
previousPoint,
nextPoint,
previousX,
previousY,
nextX,
nextY,
plotX,
plotY,
ret,
// 1 means control points midway between points, 2 means 1/3 from
// the point, 3 is 1/4 etc;
smoothing = 1.5,
denom = smoothing + 1,
leftContX,
leftContY,
rightContX,
rightContY,
dLControlPoint, // distance left control point
dRControlPoint,
leftContAngle,
rightContAngle,
jointAngle,
addedNumber = connectEnds ? 1 : 0;
// Calculate final index of points depending on the initial index value.
// Because of calculating neighbours, index may be outisde segment
// array.
if (index >= 0 && index <= segment.length - 1) {
i = index;
} else if (index < 0) {
i = segment.length - 1 + index;
} else {
i = 0;
}
prevPointInd = (i - 1 < 0) ? segment.length - (1 + addedNumber) : i - 1;
nextPointInd = (i + 1 > segment.length - 1) ? addedNumber : i + 1;
previousPoint = segment[prevPointInd];
nextPoint = segment[nextPointInd];
previousX = previousPoint.plotX;
previousY = previousPoint.plotY;
nextX = nextPoint.plotX;
nextY = nextPoint.plotY;
plotX = segment[i].plotX; // actual point
plotY = segment[i].plotY;
leftContX = (smoothing * plotX + previousX) / denom;
leftContY = (smoothing * plotY + previousY) / denom;
rightContX = (smoothing * plotX + nextX) / denom;
rightContY = (smoothing * plotY + nextY) / denom;
dLControlPoint = Math.sqrt(
Math.pow(leftContX - plotX, 2) + Math.pow(leftContY - plotY, 2)
);
dRControlPoint = Math.sqrt(
Math.pow(rightContX - plotX, 2) + Math.pow(rightContY - plotY, 2)
);
leftContAngle = Math.atan2(leftContY - plotY, leftContX - plotX);
rightContAngle = Math.atan2(rightContY - plotY, rightContX - plotX);
jointAngle = (Math.PI / 2) + ((leftContAngle + rightContAngle) / 2);
// Ensure the right direction, jointAngle should be in the same quadrant
// as leftContAngle
if (Math.abs(leftContAngle - jointAngle) > Math.PI / 2) {
jointAngle -= Math.PI;
}
// Find the corrected control points for a spline straight through the
// point
leftContX = plotX + Math.cos(jointAngle) * dLControlPoint;
leftContY = plotY + Math.sin(jointAngle) * dLControlPoint;
rightContX = plotX + Math.cos(Math.PI + jointAngle) * dRControlPoint;
rightContY = plotY + Math.sin(Math.PI + jointAngle) * dRControlPoint;
// push current point's connectors into returned object
ret = {
rightContX: rightContX,
rightContY: rightContY,
leftContX: leftContX,
leftContY: leftContY,
plotX: plotX,
plotY: plotY
};
// calculate connectors for previous and next point and push them inside
// returned object
if (calculateNeighbours) {
ret.prevPointCont = this.getConnectors(
segment,
prevPointInd,
false,
connectEnds
);
}
return ret;
};
/**
* Translate a point's plotX and plotY from the internal angle and radius
* measures to true plotX, plotY coordinates
*/
seriesProto.toXY = function (point) {
var xy,
chart = this.chart,
plotX = point.plotX,
plotY = point.plotY,
clientX;
// Save rectangular plotX, plotY for later computation
point.rectPlotX = plotX;
point.rectPlotY = plotY;
// Find the polar plotX and plotY
xy = this.xAxis.postTranslate(point.plotX, this.yAxis.len - plotY);
point.plotX = point.polarPlotX = xy.x - chart.plotLeft;
point.plotY = point.polarPlotY = xy.y - chart.plotTop;
// If shared tooltip, record the angle in degrees in order to align X
// points. Otherwise, use a standard k-d tree to get the nearest point
// in two dimensions.
if (this.kdByAngle) {
clientX = (
(plotX / Math.PI * 180) + this.xAxis.pane.options.startAngle
) % 360;
if (clientX < 0) { // #2665
clientX += 360;
}
point.clientX = clientX;
} else {
point.clientX = point.plotX;
}
};
if (seriesTypes.spline) {
/**
* Overridden method for calculating a spline from one point to the next
*/
wrap(
seriesTypes.spline.prototype,
'getPointSpline',
function (proceed, segment, point, i) {
var ret,
connectors;
if (this.chart.polar) {
// moveTo or lineTo
if (!i) {
ret = ['M', point.plotX, point.plotY];
} else { // curve from last point to this
connectors = this.getConnectors(
segment,
i,
true,
this.connectEnds
);
ret = [
'C',
connectors.prevPointCont.rightContX,
connectors.prevPointCont.rightContY,
connectors.leftContX,
connectors.leftContY,
connectors.plotX,
connectors.plotY
];
}
} else {
ret = proceed.call(this, segment, point, i);
}
return ret;
}
);
// #6430 Areasplinerange series use unwrapped getPointSpline method, so
// we need to set this method again.
if (seriesTypes.areasplinerange) {
seriesTypes.areasplinerange.prototype.getPointSpline =
seriesTypes.spline.prototype.getPointSpline;
}
}
/**
* Extend translate. The plotX and plotY values are computed as if the polar
* chart were a cartesian plane, where plotX denotes the angle in radians
* and (yAxis.len - plotY) is the pixel distance from center.
*/
H.addEvent(Series, 'afterTranslate', function () {
var chart = this.chart,
points,
i;
if (chart.polar) {
// Prepare k-d-tree handling. It searches by angle (clientX) in
// case of shared tooltip, and by two dimensional distance in case
// of non-shared.
this.kdByAngle = chart.tooltip && chart.tooltip.shared;
if (this.kdByAngle) {
this.searchPoint = this.searchPointByAngle;
} else {
this.options.findNearestPointBy = 'xy';
}
// Postprocess plot coordinates
if (!this.preventPostTranslate) {
points = this.points;
i = points.length;
while (i--) {
// Translate plotX, plotY from angle and radius to true plot
// coordinates
this.toXY(points[i]);
// Treat points below Y axis min as null (#10082)
if (
!chart.hasParallelCoordinates &&
!this.yAxis.reversed &&
points[i].y < this.yAxis.min
) {
points[i].isNull = true;
}
}
}
// Perform clip after render
if (!this.hasClipCircleSetter) {
this.hasClipCircleSetter = Boolean(
H.addEvent(this, 'afterRender', function () {
var circ;
if (chart.polar) {
circ = this.yAxis.center;
this.group.clip(
chart.renderer.clipCircle(
circ[0],
circ[1],
circ[2] / 2
)
);
this.setClip = H.noop;
}
})
);
}
}
}, { order: 2 }); // Run after translation of ||-coords
/**
* Extend getSegmentPath to allow connecting ends across 0 to provide a
* closed circle in line-like series.
*/
wrap(seriesProto, 'getGraphPath', function (proceed, points) {
var series = this,
i,
firstValid,
popLastPoint;
// Connect the path
if (this.chart.polar) {
points = points || this.points;
// Append first valid point in order to connect the ends
for (i = 0; i < points.length; i++) {
if (!points[i].isNull) {
firstValid = i;
break;
}
}
/**
* Polar charts only. Whether to connect the ends of a line series
* plot across the extremes.
*
* @sample {highcharts} highcharts/plotoptions/line-connectends-false/
* Do not connect
*
* @type {boolean}
* @since 2.3.0
* @product highcharts
* @apioption plotOptions.series.connectEnds
*/
if (this.options.connectEnds !== false &&
firstValid !== undefined
) {
this.connectEnds = true; // re-used in splines
points.splice(points.length, 0, points[firstValid]);
popLastPoint = true;
}
// For area charts, pseudo points are added to the graph, now we
// need to translate these
points.forEach(function (point) {
if (point.polarPlotY === undefined) {
series.toXY(point);
}
});
}
// Run uber method
var ret = proceed.apply(this, [].slice.call(arguments, 1));
// #6212 points.splice method is adding points to an array. In case of
// areaspline getGraphPath method is used two times and in both times
// points are added to an array. That is why points.pop is used, to get
// unmodified points.
if (popLastPoint) {
points.pop();
}
return ret;
});
var polarAnimate = function (proceed, init) {
var chart = this.chart,
animation = this.options.animation,
group = this.group,
markerGroup = this.markerGroup,
center = this.xAxis.center,
plotLeft = chart.plotLeft,
plotTop = chart.plotTop,
attribs;
// Specific animation for polar charts
if (chart.polar) {
// Enable animation on polar charts only in SVG. In VML, the scaling
// is different, plus animation would be so slow it would't matter.
if (chart.renderer.isSVG) {
if (animation === true) {
animation = {};
}
// Initialize the animation
if (init) {
// Scale down the group and place it in the center
attribs = {
translateX: center[0] + plotLeft,
translateY: center[1] + plotTop,
scaleX: 0.001, // #1499
scaleY: 0.001
};
group.attr(attribs);
if (markerGroup) {
markerGroup.attr(attribs);
}
// Run the animation
} else {
attribs = {
translateX: plotLeft,
translateY: plotTop,
scaleX: 1,
scaleY: 1
};
group.animate(attribs, animation);
if (markerGroup) {
markerGroup.animate(attribs, animation);
}
// Delete this function to allow it only once
this.animate = null;
}
}
// For non-polar charts, revert to the basic animation
} else {
proceed.call(this, init);
}
};
// Define the animate method for regular series
wrap(seriesProto, 'animate', polarAnimate);
if (seriesTypes.column) {
colProto = seriesTypes.column.prototype;
colProto.polarArc = function (low, high, start, end) {
var center = this.xAxis.center,
len = this.yAxis.len;
return this.chart.renderer.symbols.arc(
center[0],
center[1],
len - high,
null,
{
start: start,
end: end,
innerR: len - pick(low, len)
}
);
};
/**
* Define the animate method for columnseries
*/
wrap(colProto, 'animate', polarAnimate);
/**
* Extend the column prototype's translate method
*/
wrap(colProto, 'translate', function (proceed) {
var xAxis = this.xAxis,
startAngleRad = xAxis.startAngleRad,
start,
points,
point,
i;
this.preventPostTranslate = true;
// Run uber method
proceed.call(this);
// Postprocess plot coordinates
if (xAxis.isRadial) {
points = this.points;
i = points.length;
while (i--) {
point = points[i];
start = point.barX + startAngleRad;
point.shapeType = 'path';
point.shapeArgs = {
d: this.polarArc(
point.yBottom,
point.plotY,
start,
start + point.pointWidth
)
};
// Provide correct plotX, plotY for tooltip
this.toXY(point);
point.tooltipPos = [point.plotX, point.plotY];
point.ttBelow = point.plotY > xAxis.center[1];
}
}
});
/**
* Align column data labels outside the columns. #1199.
*/
wrap(colProto, 'alignDataLabel', function (
proceed,
point,
dataLabel,
options,
alignTo,
isNew
) {
if (this.chart.polar) {
var angle = point.rectPlotX / Math.PI * 180,
align,
verticalAlign;
// Align nicely outside the perimeter of the columns
if (options.align === null) {
if (angle > 20 && angle < 160) {
align = 'left'; // right hemisphere
} else if (angle > 200 && angle < 340) {
align = 'right'; // left hemisphere
} else {
align = 'center'; // top or bottom
}
options.align = align;
}
if (options.verticalAlign === null) {
if (angle < 45 || angle > 315) {
verticalAlign = 'bottom'; // top part
} else if (angle > 135 && angle < 225) {
verticalAlign = 'top'; // bottom part
} else {
verticalAlign = 'middle'; // left or right
}
options.verticalAlign = verticalAlign;
}
seriesProto.alignDataLabel.call(
this,
point,
dataLabel,
options,
alignTo,
isNew
);
} else {
proceed.call(this, point, dataLabel, options, alignTo, isNew);
}
});
}
/**
* Extend getCoordinates to prepare for polar axis values
*/
wrap(pointerProto, 'getCoordinates', function (proceed, e) {
var chart = this.chart,
ret = {
xAxis: [],
yAxis: []
};
if (chart.polar) {
chart.axes.forEach(function (axis) {
var isXAxis = axis.isXAxis,
center = axis.center,
x = e.chartX - center[0] - chart.plotLeft,
y = e.chartY - center[1] - chart.plotTop;
ret[isXAxis ? 'xAxis' : 'yAxis'].push({
axis: axis,
value: axis.translate(
isXAxis ?
Math.PI - Math.atan2(x, y) : // angle
// distance from center
Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)),
true
)
});
});
} else {
ret = proceed.call(this, e);
}
return ret;
});
H.SVGRenderer.prototype.clipCircle = function (x, y, r) {
var wrapper,
id = H.uniqueKey(),
clipPath = this.createElement('clipPath').attr({
id: id
}).add(this.defs);
wrapper = this.circle(x, y, r).add(clipPath);
wrapper.id = id;
wrapper.clipPath = clipPath;
return wrapper;
};
H.addEvent(H.Chart, 'getAxes', function () {
if (!this.pane) {
this.pane = [];
}
H.splat(this.options.pane).forEach(function (paneOptions) {
new H.Pane( // eslint-disable-line no-new
paneOptions,
this
);
}, this);
});
H.addEvent(H.Chart, 'afterDrawChartBox', function () {
this.pane.forEach(function (pane) {
pane.render();
});
});
/**
* Extend chart.get to also search in panes. Used internally in
* responsiveness and chart.update.
*/
wrap(H.Chart.prototype, 'get', function (proceed, id) {
return H.find(this.pane, function (pane) {
return pane.options.id === id;
}) || proceed.call(this, id);
});