corrade-nucleus-nucleons – Rev 20
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/**
* @license Highcharts JS v5.0.12 (2017-05-24)
*
* (c) 2009-2017 Torstein Honsi
*
* License: www.highcharts.com/license
*/
'use strict';
(function(factory) {
if (typeof module === 'object' && module.exports) {
module.exports = factory;
} else {
factory(Highcharts);
}
}(function(Highcharts) {
(function(H) {
/**
* (c) 2009-2017 Torstein Honsi
*
* License: www.highcharts.com/license
*/
/**
* EXPERIMENTAL Highcharts module to place labels next to a series in a natural position.
*
* TODO:
* - add column support (box collision detection, boxesToAvoid logic)
* - other series types, area etc.
* - avoid data labels, when data labels above, show series label below.
* - add more options (connector, format, formatter)
*
* http://jsfiddle.net/highcharts/L2u9rpwr/
* http://jsfiddle.net/highcharts/y5A37/
* http://jsfiddle.net/highcharts/264Nm/
* http://jsfiddle.net/highcharts/y5A37/
*/
var labelDistance = 3,
wrap = H.wrap,
each = H.each,
extend = H.extend,
isNumber = H.isNumber,
Series = H.Series,
SVGRenderer = H.SVGRenderer,
Chart = H.Chart;
H.setOptions({
plotOptions: {
series: {
label: {
enabled: true,
// Allow labels to be placed distant to the graph if necessary, and
// draw a connector line to the graph
connectorAllowed: true,
connectorNeighbourDistance: 24, // If the label is closer than this to a neighbour graph, draw a connector
styles: {
fontWeight: 'bold'
}
// boxesToAvoid: []
}
}
}
});
/**
* Counter-clockwise, part of the fast line intersection logic
*/
function ccw(x1, y1, x2, y2, x3, y3) {
var cw = ((y3 - y1) * (x2 - x1)) - ((y2 - y1) * (x3 - x1));
return cw > 0 ? true : cw < 0 ? false : true;
}
/**
* Detect if two lines intersect
*/
function intersectLine(x1, y1, x2, y2, x3, y3, x4, y4) {
return ccw(x1, y1, x3, y3, x4, y4) !== ccw(x2, y2, x3, y3, x4, y4) &&
ccw(x1, y1, x2, y2, x3, y3) !== ccw(x1, y1, x2, y2, x4, y4);
}
/**
* Detect if a box intersects with a line
*/
function boxIntersectLine(x, y, w, h, x1, y1, x2, y2) {
return (
intersectLine(x, y, x + w, y, x1, y1, x2, y2) || // top of label
intersectLine(x + w, y, x + w, y + h, x1, y1, x2, y2) || // right of label
intersectLine(x, y + h, x + w, y + h, x1, y1, x2, y2) || // bottom of label
intersectLine(x, y, x, y + h, x1, y1, x2, y2) // left of label
);
}
/**
* General symbol definition for labels with connector
*/
SVGRenderer.prototype.symbols.connector = function(x, y, w, h, options) {
var anchorX = options && options.anchorX,
anchorY = options && options.anchorY,
path,
yOffset,
lateral = w / 2;
if (isNumber(anchorX) && isNumber(anchorY)) {
path = ['M', anchorX, anchorY];
// Prefer 45 deg connectors
yOffset = y - anchorY;
if (yOffset < 0) {
yOffset = -h - yOffset;
}
if (yOffset < w) {
lateral = anchorX < x + (w / 2) ? yOffset : w - yOffset;
}
// Anchor below label
if (anchorY > y + h) {
path.push('L', x + lateral, y + h);
// Anchor above label
} else if (anchorY < y) {
path.push('L', x + lateral, y);
// Anchor left of label
} else if (anchorX < x) {
path.push('L', x, y + h / 2);
// Anchor right of label
} else if (anchorX > x + w) {
path.push('L', x + w, y + h / 2);
}
}
return path || [];
};
/**
* Points to avoid. In addition to actual data points, the label should avoid
* interpolated positions.
*/
Series.prototype.getPointsOnGraph = function() {
var distance = 16,
points = this.points,
point,
last,
interpolated = [],
i,
deltaX,
deltaY,
delta,
len,
n,
j,
d,
graph = this.graph || this.area,
node = graph.element,
inverted = this.chart.inverted,
paneLeft = inverted ? this.yAxis.pos : this.xAxis.pos,
paneTop = inverted ? this.xAxis.pos : this.yAxis.pos;
// For splines, get the point at length (possible caveat: peaks are not correctly detected)
if (this.getPointSpline && node.getPointAtLength) {
// If it is animating towards a path definition, use that briefly, and reset
if (graph.toD) {
d = graph.attr('d');
graph.attr({
d: graph.toD
});
}
len = node.getTotalLength();
for (i = 0; i < len; i += distance) {
point = node.getPointAtLength(i);
interpolated.push({
chartX: paneLeft + point.x,
chartY: paneTop + point.y,
plotX: point.x,
plotY: point.y
});
}
if (d) {
graph.attr({
d: d
});
}
// Last point
point = points[points.length - 1];
point.chartX = paneLeft + point.plotX;
point.chartY = paneTop + point.plotY;
interpolated.push(point);
// Interpolate
} else {
len = points.length;
for (i = 0; i < len; i += 1) {
point = points[i];
last = points[i - 1];
// Absolute coordinates so we can compare different panes
point.chartX = paneLeft + point.plotX;
point.chartY = paneTop + point.plotY;
// Add interpolated points
if (i > 0) {
deltaX = Math.abs(point.chartX - last.chartX);
deltaY = Math.abs(point.chartY - last.chartY);
delta = Math.max(deltaX, deltaY);
if (delta > distance) {
n = Math.ceil(delta / distance);
for (j = 1; j < n; j += 1) {
interpolated.push({
chartX: last.chartX + (point.chartX - last.chartX) * (j / n),
chartY: last.chartY + (point.chartY - last.chartY) * (j / n),
plotX: last.plotX + (point.plotX - last.plotX) * (j / n),
plotY: last.plotY + (point.plotY - last.plotY) * (j / n)
});
}
}
}
// Add the real point in order to find positive and negative peaks
if (isNumber(point.plotY)) {
interpolated.push(point);
}
}
}
return interpolated;
};
/**
* Check whether a proposed label position is clear of other elements
*/
Series.prototype.checkClearPoint = function(x, y, bBox, checkDistance) {
var distToOthersSquared = Number.MAX_VALUE, // distance to other graphs
distToPointSquared = Number.MAX_VALUE,
dist,
connectorPoint,
connectorEnabled = this.options.label.connectorAllowed,
chart = this.chart,
series,
points,
leastDistance = 16,
withinRange,
i,
j;
function intersectRect(r1, r2) {
return !(r2.left > r1.right ||
r2.right < r1.left ||
r2.top > r1.bottom ||
r2.bottom < r1.top);
}
/**
* Get the weight in order to determine the ideal position. Larger distance to
* other series gives more weight. Smaller distance to the actual point (connector points only)
* gives more weight.
*/
function getWeight(distToOthersSquared, distToPointSquared) {
return distToOthersSquared - distToPointSquared;
}
// First check for collision with existing labels
for (i = 0; i < chart.boxesToAvoid.length; i += 1) {
if (intersectRect(chart.boxesToAvoid[i], {
left: x,
right: x + bBox.width,
top: y,
bottom: y + bBox.height
})) {
return false;
}
}
// For each position, check if the lines around the label intersect with any of the
// graphs
for (i = 0; i < chart.series.length; i += 1) {
series = chart.series[i];
points = series.interpolatedPoints;
if (series.visible && points) {
for (j = 1; j < points.length; j += 1) {
// If any of the box sides intersect with the line, return
if (boxIntersectLine(
x,
y,
bBox.width,
bBox.height,
points[j - 1].chartX,
points[j - 1].chartY,
points[j].chartX,
points[j].chartY
)) {
return false;
}
// But if it is too far away (a padded box doesn't intersect), also return
if (this === series && !withinRange && checkDistance) {
withinRange = boxIntersectLine(
x - leastDistance,
y - leastDistance,
bBox.width + 2 * leastDistance,
bBox.height + 2 * leastDistance,
points[j - 1].chartX,
points[j - 1].chartY,
points[j].chartX,
points[j].chartY
);
}
// Find the squared distance from the center of the label
if (this !== series) {
distToOthersSquared = Math.min(
distToOthersSquared,
Math.pow(x + bBox.width / 2 - points[j].chartX, 2) + Math.pow(y + bBox.height / 2 - points[j].chartY, 2),
Math.pow(x - points[j].chartX, 2) + Math.pow(y - points[j].chartY, 2),
Math.pow(x + bBox.width - points[j].chartX, 2) + Math.pow(y - points[j].chartY, 2),
Math.pow(x + bBox.width - points[j].chartX, 2) + Math.pow(y + bBox.height - points[j].chartY, 2),
Math.pow(x - points[j].chartX, 2) + Math.pow(y + bBox.height - points[j].chartY, 2)
);
}
}
// Do we need a connector?
if (connectorEnabled && this === series && ((checkDistance && !withinRange) ||
distToOthersSquared < Math.pow(this.options.label.connectorNeighbourDistance, 2))) {
for (j = 1; j < points.length; j += 1) {
dist = Math.min(
Math.pow(x + bBox.width / 2 - points[j].chartX, 2) + Math.pow(y + bBox.height / 2 - points[j].chartY, 2),
Math.pow(x - points[j].chartX, 2) + Math.pow(y - points[j].chartY, 2),
Math.pow(x + bBox.width - points[j].chartX, 2) + Math.pow(y - points[j].chartY, 2),
Math.pow(x + bBox.width - points[j].chartX, 2) + Math.pow(y + bBox.height - points[j].chartY, 2),
Math.pow(x - points[j].chartX, 2) + Math.pow(y + bBox.height - points[j].chartY, 2)
);
if (dist < distToPointSquared) {
distToPointSquared = dist;
connectorPoint = points[j];
}
}
withinRange = true;
}
}
}
return !checkDistance || withinRange ? {
x: x,
y: y,
weight: getWeight(distToOthersSquared, connectorPoint ? distToPointSquared : 0),
connectorPoint: connectorPoint
} : false;
};
/**
* The main initiator method that runs on chart level after initiation and redraw. It runs in
* a timeout to prevent locking, and loops over all series, taking all series and labels into
* account when placing the labels.
*/
Chart.prototype.drawSeriesLabels = function() {
var chart = this,
labelSeries = this.labelSeries;
chart.boxesToAvoid = [];
// Build the interpolated points
each(labelSeries, function(series) {
series.interpolatedPoints = series.getPointsOnGraph();
each(series.options.label.boxesToAvoid || [], function(box) {
chart.boxesToAvoid.push(box);
});
});
each(chart.series, function(series) {
var bBox,
x,
y,
results = [],
clearPoint,
i,
best,
inverted = chart.inverted,
paneLeft = inverted ? series.yAxis.pos : series.xAxis.pos,
paneTop = inverted ? series.xAxis.pos : series.yAxis.pos,
paneWidth = chart.inverted ? series.yAxis.len : series.xAxis.len,
paneHeight = chart.inverted ? series.xAxis.len : series.yAxis.len,
points = series.interpolatedPoints,
label = series.labelBySeries;
function insidePane(x, y, bBox) {
return x > paneLeft && x <= paneLeft + paneWidth - bBox.width &&
y >= paneTop && y <= paneTop + paneHeight - bBox.height;
}
if (series.visible && points) {
if (!label) {
series.labelBySeries = label = chart.renderer
.label(series.name, 0, -9999, 'connector')
.css(extend({
color: series.color
}, series.options.label.styles))
.attr({
padding: 0,
opacity: 0,
stroke: series.color,
'stroke-width': 1
})
.add(series.group)
.animate({
opacity: 1
}, {
duration: 200
});
}
bBox = label.getBBox();
bBox.width = Math.round(bBox.width);
// Ideal positions are centered above or below a point on right side
// of chart
for (i = points.length - 1; i > 0; i -= 1) {
// Right - up
x = points[i].chartX + labelDistance;
y = points[i].chartY - bBox.height - labelDistance;
if (insidePane(x, y, bBox)) {
best = series.checkClearPoint(
x,
y,
bBox
);
}
if (best) {
results.push(best);
}
// Right - down
x = points[i].chartX + labelDistance;
y = points[i].chartY + labelDistance;
if (insidePane(x, y, bBox)) {
best = series.checkClearPoint(
x,
y,
bBox
);
}
if (best) {
results.push(best);
}
// Left - down
x = points[i].chartX - bBox.width - labelDistance;
y = points[i].chartY + labelDistance;
if (insidePane(x, y, bBox)) {
best = series.checkClearPoint(
x,
y,
bBox
);
}
if (best) {
results.push(best);
}
// Left - up
x = points[i].chartX - bBox.width - labelDistance;
y = points[i].chartY - bBox.height - labelDistance;
if (insidePane(x, y, bBox)) {
best = series.checkClearPoint(
x,
y,
bBox
);
}
if (best) {
results.push(best);
}
}
// Brute force, try all positions on the chart in a 16x16 grid
if (!results.length) {
for (x = paneLeft + paneWidth - bBox.width; x >= paneLeft; x -= 16) {
for (y = paneTop; y < paneTop + paneHeight - bBox.height; y += 16) {
clearPoint = series.checkClearPoint(x, y, bBox, true);
if (clearPoint) {
results.push(clearPoint);
}
}
}
}
if (results.length) {
results.sort(function(a, b) {
return b.weight - a.weight;
});
best = results[0];
chart.boxesToAvoid.push({
left: best.x,
right: best.x + bBox.width,
top: best.y,
bottom: best.y + bBox.height
});
// Move it if needed
if (Math.round(best.x) !== Math.round(label.x) ||
Math.round(best.y) !== Math.round(label.y)) {
series.labelBySeries
.attr({
opacity: 0,
x: best.x - paneLeft,
y: best.y - paneTop,
anchorX: best.connectorPoint && best.connectorPoint.plotX,
anchorY: best.connectorPoint && best.connectorPoint.plotY
})
.animate({
opacity: 1
});
// Record closest point to stick to for sync redraw
series.options.kdNow = true;
series.buildKDTree();
var closest = series.searchPoint({
chartX: best.x,
chartY: best.y
}, true);
label.closest = [
closest,
best.x - paneLeft - closest.plotX,
best.y - paneTop - closest.plotY
];
}
} else if (label) {
series.labelBySeries = label.destroy();
}
}
});
};
/**
* Prepare drawing series labels
*/
function drawLabels(proceed) {
var chart = this,
delay = Math.max(
H.animObject(chart.renderer.globalAnimation).duration,
250
),
initial = !chart.hasRendered;
proceed.apply(chart, [].slice.call(arguments, 1));
chart.labelSeries = [];
clearTimeout(chart.seriesLabelTimer);
// Which series should have labels
each(chart.series, function(series) {
var options = series.options.label,
label = series.labelBySeries,
closest = label && label.closest;
if (options.enabled && series.visible && (series.graph || series.area)) {
chart.labelSeries.push(series);
// The labels are processing heavy, wait until the animation is done
if (initial) {
delay = Math.max(
delay,
H.animObject(series.options.animation).duration
);
}
// Keep the position updated to the axis while redrawing
if (closest) {
if (closest[0].plotX !== undefined) {
label.animate({
x: closest[0].plotX + closest[1],
y: closest[0].plotY + closest[2]
});
} else {
label.attr({
opacity: 0
});
}
}
}
});
chart.seriesLabelTimer = setTimeout(function() {
chart.drawSeriesLabels();
}, delay);
}
wrap(Chart.prototype, 'render', drawLabels);
wrap(Chart.prototype, 'redraw', drawLabels);
}(Highcharts));
}));
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