tupali/librerias/gantt/code/es-modules/modules/overlapping-datalabels.src.js

193 lines
7.5 KiB
JavaScript
Raw Normal View History

2020-05-23 20:45:54 +00:00
/* *
*
* Highcharts module to hide overlapping data labels.
* This module is included in Highcharts.
*
* (c) 2009-2020 Torstein Honsi
*
* License: www.highcharts.com/license
*
* !!!!!!! SOURCE GETS TRANSPILED BY TYPESCRIPT. EDIT TS FILE ONLY. !!!!!!!
*
* */
'use strict';
import H from '../parts/Globals.js';
import U from '../parts/Utilities.js';
var addEvent = U.addEvent, fireEvent = U.fireEvent, isArray = U.isArray, objectEach = U.objectEach, pick = U.pick;
import '../parts/Chart.js';
var Chart = H.Chart;
/* eslint-disable no-invalid-this */
// Collect potensial overlapping data labels. Stack labels probably don't need
// to be considered because they are usually accompanied by data labels that lie
// inside the columns.
addEvent(Chart, 'render', function collectAndHide() {
var labels = [];
// Consider external label collectors
(this.labelCollectors || []).forEach(function (collector) {
labels = labels.concat(collector());
});
(this.yAxis || []).forEach(function (yAxis) {
if (yAxis.stacking &&
yAxis.options.stackLabels &&
!yAxis.options.stackLabels.allowOverlap) {
objectEach(yAxis.stacking.stacks, function (stack) {
objectEach(stack, function (stackItem) {
labels.push(stackItem.label);
});
});
}
});
(this.series || []).forEach(function (series) {
var dlOptions = series.options.dataLabels;
if (series.visible &&
!(dlOptions.enabled === false && !series._hasPointLabels)) { // #3866
(series.nodes || series.points).forEach(function (point) {
if (point.visible) {
var dataLabels = (isArray(point.dataLabels) ?
point.dataLabels :
(point.dataLabel ? [point.dataLabel] : []));
dataLabels.forEach(function (label) {
var options = label.options;
label.labelrank = pick(options.labelrank, point.labelrank, point.shapeArgs && point.shapeArgs.height); // #4118
if (!options.allowOverlap) {
labels.push(label);
}
});
}
});
}
});
this.hideOverlappingLabels(labels);
});
/**
* Hide overlapping labels. Labels are moved and faded in and out on zoom to
* provide a smooth visual imression.
*
* @private
* @function Highcharts.Chart#hideOverlappingLabels
* @param {Array<Highcharts.SVGElement>} labels
* Rendered data labels
* @return {void}
* @requires modules/overlapping-datalabels
*/
Chart.prototype.hideOverlappingLabels = function (labels) {
var chart = this, len = labels.length, ren = chart.renderer, label, i, j, label1, label2, box1, box2, isLabelAffected = false, isIntersectRect = function (box1, box2) {
return !(box2.x > box1.x + box1.width ||
box2.x + box2.width < box1.x ||
box2.y > box1.y + box1.height ||
box2.y + box2.height < box1.y);
},
// Get the box with its position inside the chart, as opposed to getBBox
// that only reports the position relative to the parent.
getAbsoluteBox = function (label) {
var pos, parent, bBox,
// Substract the padding if no background or border (#4333)
padding = label.box ? 0 : (label.padding || 0), lineHeightCorrection = 0, xOffset = 0, boxWidth, alignValue;
if (label &&
(!label.alignAttr || label.placed)) {
pos = label.alignAttr || {
x: label.attr('x'),
y: label.attr('y')
};
parent = label.parentGroup;
// Get width and height if pure text nodes (stack labels)
if (!label.width) {
bBox = label.getBBox();
label.width = bBox.width;
label.height = bBox.height;
// Labels positions are computed from top left corner, so
// we need to substract the text height from text nodes too.
lineHeightCorrection = ren
.fontMetrics(null, label.element).h;
}
boxWidth = label.width - 2 * padding;
alignValue = {
left: '0',
center: '0.5',
right: '1'
}[label.alignValue];
if (alignValue) {
xOffset = +alignValue * boxWidth;
}
else if (Math.round(label.x) !== label.translateX) {
xOffset = label.x - label.translateX;
}
return {
x: pos.x + (parent.translateX || 0) + padding - xOffset,
y: pos.y + (parent.translateY || 0) + padding -
lineHeightCorrection,
width: label.width - 2 * padding,
height: label.height - 2 * padding
};
}
};
for (i = 0; i < len; i++) {
label = labels[i];
if (label) {
// Mark with initial opacity
label.oldOpacity = label.opacity;
label.newOpacity = 1;
label.absoluteBox = getAbsoluteBox(label);
}
}
// Prevent a situation in a gradually rising slope, that each label will
// hide the previous one because the previous one always has lower rank.
labels.sort(function (a, b) {
return (b.labelrank || 0) - (a.labelrank || 0);
});
// Detect overlapping labels
for (i = 0; i < len; i++) {
label1 = labels[i];
box1 = label1 && label1.absoluteBox;
for (j = i + 1; j < len; ++j) {
label2 = labels[j];
box2 = label2 && label2.absoluteBox;
if (box1 &&
box2 &&
label1 !== label2 && // #6465, polar chart with connectEnds
label1.newOpacity !== 0 &&
label2.newOpacity !== 0) {
if (isIntersectRect(box1, box2)) {
(label1.labelrank < label2.labelrank ? label1 : label2)
.newOpacity = 0;
}
}
}
}
// Hide or show
labels.forEach(function (label) {
var complete, newOpacity;
if (label) {
newOpacity = label.newOpacity;
if (label.oldOpacity !== newOpacity) {
// Make sure the label is completely hidden to avoid catching
// clicks (#4362)
if (label.alignAttr && label.placed) { // data labels
label[newOpacity ? 'removeClass' : 'addClass']('highcharts-data-label-hidden');
complete = function () {
if (!chart.styledMode) {
label.css({ pointerEvents: newOpacity ? 'auto' : 'none' });
}
label.visibility = newOpacity ? 'inherit' : 'hidden';
label.placed = !!newOpacity;
};
isLabelAffected = true;
// Animate or set the opacity
label.alignAttr.opacity = newOpacity;
label[label.isOld ? 'animate' : 'attr'](label.alignAttr, null, complete);
fireEvent(chart, 'afterHideOverlappingLabel');
}
else { // other labels, tick labels
label.attr({
opacity: newOpacity
});
}
}
label.isOld = true;
}
});
if (isLabelAffected) {
fireEvent(chart, 'afterHideAllOverlappingLabels');
}
};