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graph_interact.js
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/**
* Copyright 2012-2016, Plotly, Inc.
* All rights reserved.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
'use strict';
var d3 = require('d3');
var tinycolor = require('tinycolor2');
var isNumeric = require('fast-isnumeric');
var Lib = require('../../lib');
var Events = require('../../lib/events');
var svgTextUtils = require('../../lib/svg_text_utils');
var Color = require('../../components/color');
var Drawing = require('../../components/drawing');
var dragElement = require('../../components/dragelement');
var Axes = require('./axes');
var constants = require('./constants');
var dragBox = require('./dragbox');
var fx = module.exports = {};
// TODO remove this in version 2.0
// copy on Fx for backward compatible
fx.unhover = dragElement.unhover;
fx.layoutAttributes = {
dragmode: {
valType: 'enumerated',
role: 'info',
values: ['zoom', 'pan', 'select', 'lasso', 'orbit', 'turntable'],
dflt: 'zoom',
description: [
'Determines the mode of drag interactions.',
'*select* and *lasso* apply only to scatter traces with',
'markers or text. *orbit* and *turntable* apply only to',
'3D scenes.'
].join(' ')
},
hovermode: {
valType: 'enumerated',
role: 'info',
values: ['x', 'y', 'closest', false],
description: 'Determines the mode of hover interactions.'
}
};
fx.supplyLayoutDefaults = function(layoutIn, layoutOut, fullData) {
function coerce(attr, dflt) {
return Lib.coerce(layoutIn, layoutOut, fx.layoutAttributes, attr, dflt);
}
coerce('dragmode');
var hovermodeDflt;
if(layoutOut._hasCartesian) {
// flag for 'horizontal' plots:
// determines the state of the mode bar 'compare' hovermode button
var isHoriz = layoutOut._isHoriz = fx.isHoriz(fullData);
hovermodeDflt = isHoriz ? 'y' : 'x';
}
else hovermodeDflt = 'closest';
coerce('hovermode', hovermodeDflt);
};
fx.isHoriz = function(fullData) {
var isHoriz = true;
for(var i = 0; i < fullData.length; i++) {
var trace = fullData[i];
if(trace.orientation !== 'h') {
isHoriz = false;
break;
}
}
return isHoriz;
};
fx.init = function(gd) {
var fullLayout = gd._fullLayout;
if(!fullLayout._hasCartesian || gd._context.staticPlot) return;
var subplots = Object.keys(fullLayout._plots || {}).sort(function(a,b) {
// sort overlays last, then by x axis number, then y axis number
if((fullLayout._plots[a].mainplot && true) ===
(fullLayout._plots[b].mainplot && true)) {
var aParts = a.split('y'),
bParts = b.split('y');
return (aParts[0]===bParts[0]) ?
(Number(aParts[1]||1) - Number(bParts[1]||1)) :
(Number(aParts[0]||1) - Number(bParts[0]||1));
}
return fullLayout._plots[a].mainplot ? 1 : -1;
});
subplots.forEach(function(subplot) {
var plotinfo = fullLayout._plots[subplot];
if(!fullLayout._hasCartesian) return;
var xa = plotinfo.x(),
ya = plotinfo.y(),
// the y position of the main x axis line
y0 = (xa._linepositions[subplot]||[])[3],
// the x position of the main y axis line
x0 = (ya._linepositions[subplot]||[])[3];
var DRAGGERSIZE = constants.DRAGGERSIZE;
if(isNumeric(y0) && xa.side==='top') y0 -= DRAGGERSIZE;
if(isNumeric(x0) && ya.side!=='right') x0 -= DRAGGERSIZE;
// main and corner draggers need not be repeated for
// overlaid subplots - these draggers drag them all
if(!plotinfo.mainplot) {
// main dragger goes over the grids and data, so we use its
// mousemove events for all data hover effects
var maindrag = dragBox(gd, plotinfo, 0, 0,
xa._length, ya._length,'ns','ew');
maindrag.onmousemove = function(evt) {
fx.hover(gd, evt, subplot);
fullLayout._lasthover = maindrag;
fullLayout._hoversubplot = subplot;
};
/*
* IMPORTANT:
* We must check for the presence of the drag cover here.
* If we don't, a 'mouseout' event is triggered on the
* maindrag before each 'click' event, which has the effect
* of clearing the hoverdata; thus, cancelling the click event.
*/
maindrag.onmouseout = function(evt) {
if(gd._dragging) return;
dragElement.unhover(gd, evt);
};
maindrag.onclick = function(evt) {
fx.click(gd, evt);
};
// corner draggers
dragBox(gd, plotinfo, -DRAGGERSIZE, -DRAGGERSIZE,
DRAGGERSIZE, DRAGGERSIZE, 'n', 'w');
dragBox(gd, plotinfo, xa._length, -DRAGGERSIZE,
DRAGGERSIZE, DRAGGERSIZE, 'n', 'e');
dragBox(gd, plotinfo, -DRAGGERSIZE, ya._length,
DRAGGERSIZE, DRAGGERSIZE, 's', 'w');
dragBox(gd, plotinfo, xa._length, ya._length,
DRAGGERSIZE, DRAGGERSIZE, 's', 'e');
}
// x axis draggers - if you have overlaid plots,
// these drag each axis separately
if(isNumeric(y0)) {
if(xa.anchor==='free') y0 -= fullLayout._size.h*(1-ya.domain[1]);
dragBox(gd, plotinfo, xa._length*0.1, y0,
xa._length*0.8, DRAGGERSIZE, '', 'ew');
dragBox(gd, plotinfo, 0, y0,
xa._length*0.1, DRAGGERSIZE, '', 'w');
dragBox(gd, plotinfo, xa._length*0.9, y0,
xa._length*0.1, DRAGGERSIZE, '', 'e');
}
// y axis draggers
if(isNumeric(x0)) {
if(ya.anchor==='free') x0 -= fullLayout._size.w*xa.domain[0];
dragBox(gd, plotinfo, x0, ya._length*0.1,
DRAGGERSIZE, ya._length*0.8, 'ns', '');
dragBox(gd, plotinfo, x0, ya._length*0.9,
DRAGGERSIZE, ya._length*0.1, 's', '');
dragBox(gd, plotinfo, x0, 0,
DRAGGERSIZE, ya._length*0.1, 'n', '');
}
});
// In case you mousemove over some hovertext, send it to fx.hover too
// we do this so that we can put the hover text in front of everything,
// but still be able to interact with everything as if it isn't there
var hoverLayer = fullLayout._hoverlayer.node();
hoverLayer.onmousemove = function(evt) {
evt.target = fullLayout._lasthover;
fx.hover(gd, evt, fullLayout._hoversubplot);
};
hoverLayer.onclick = function(evt) {
evt.target = fullLayout._lasthover;
fx.click(gd, evt);
};
// also delegate mousedowns... TODO: does this actually work?
hoverLayer.onmousedown = function(evt) {
fullLayout._lasthover.onmousedown(evt);
};
};
// hover labels for multiple horizontal bars get tilted by some angle,
// then need to be offset differently if they overlap
var YANGLE = constants.YANGLE,
YA_RADIANS = Math.PI*YANGLE/180,
// expansion of projected height
YFACTOR = 1/Math.sin(YA_RADIANS),
// to make the appropriate post-rotation x offset,
// you need both x and y offsets
YSHIFTX = Math.cos(YA_RADIANS),
YSHIFTY = Math.sin(YA_RADIANS);
// convenience functions for mapping all relevant axes
function flat(subplots, v) {
var out = [];
for(var i=subplots.length; i>0; i--) out.push(v);
return out;
}
function p2c(axArray, v) {
var out = [];
for(var i=0; i<axArray.length; i++) out.push(axArray[i].p2c(v));
return out;
}
function quadrature(dx, dy) {
return function(di) {
var x = dx(di),
y = dy(di);
return Math.sqrt(x*x + y*y);
};
}
// size and display constants for hover text
var HOVERARROWSIZE = constants.HOVERARROWSIZE,
HOVERTEXTPAD = constants.HOVERTEXTPAD,
HOVERFONTSIZE = constants.HOVERFONTSIZE,
HOVERFONT = constants.HOVERFONT;
// fx.hover: highlight data on hover
// evt can be a mousemove event, or an object with data about what points
// to hover on
// {xpx,ypx[,hovermode]} - pixel locations from top left
// (with optional overriding hovermode)
// {xval,yval[,hovermode]} - data values
// [{curveNumber,(pointNumber|xval and/or yval)}] -
// array of specific points to highlight
// pointNumber is a single integer if gd.data[curveNumber] is 1D,
// or a two-element array if it's 2D
// xval and yval are data values,
// 1D data may specify either or both,
// 2D data must specify both
// subplot is an id string (default "xy")
// makes use of gl.hovermode, which can be:
// x (find the points with the closest x values, ie a column),
// closest (find the single closest point)
// internally there are two more that occasionally get used:
// y (pick out a row - only used for multiple horizontal bar charts)
// array (used when the user specifies an explicit
// array of points to hover on)
//
// We wrap the hovers in a timer, to limit their frequency.
// The actual rendering is done by private functions
// hover() and unhover().
fx.hover = function(gd, evt, subplot) {
if(typeof gd === 'string') gd = document.getElementById(gd);
if(gd._lastHoverTime === undefined) gd._lastHoverTime = 0;
// If we have an update queued, discard it now
if(gd._hoverTimer !== undefined) {
clearTimeout(gd._hoverTimer);
gd._hoverTimer = undefined;
}
// Is it more than 100ms since the last update? If so, force
// an update now (synchronously) and exit
if(Date.now() > gd._lastHoverTime + constants.HOVERMINTIME) {
hover(gd,evt,subplot);
gd._lastHoverTime = Date.now();
return;
}
// Queue up the next hover for 100ms from now (if no further events)
gd._hoverTimer = setTimeout(function() {
hover(gd,evt,subplot);
gd._lastHoverTime = Date.now();
gd._hoverTimer = undefined;
}, constants.HOVERMINTIME);
};
// The actual implementation is here:
function hover(gd, evt, subplot) {
if(subplot === 'pie') {
gd.emit('plotly_hover', {
points: [evt]
});
return;
}
if(!subplot) subplot = 'xy';
var fullLayout = gd._fullLayout,
plotinfo = fullLayout._plots[subplot],
//If the user passed in an array of subplots, use those instead of finding overlayed plots
subplots = Array.isArray(subplot) ?
subplot :
// list of all overlaid subplots to look at
[subplot].concat(plotinfo.overlays
.map(function(pi) { return pi.id; })),
xaArray = subplots.map(function(spId) {
var ternary = (gd._fullLayout[spId] || {})._ternary;
if(ternary) return ternary.xaxis;
return Axes.getFromId(gd, spId, 'x');
}),
yaArray = subplots.map(function(spId) {
var ternary = (gd._fullLayout[spId] || {})._ternary;
if(ternary) return ternary.yaxis;
return Axes.getFromId(gd, spId, 'y');
}),
hovermode = evt.hovermode || fullLayout.hovermode;
if(['x','y','closest'].indexOf(hovermode)===-1 || !gd.calcdata ||
gd.querySelector('.zoombox') || gd._dragging) {
return dragElement.unhoverRaw(gd, evt);
}
// hoverData: the set of candidate points we've found to highlight
var hoverData = [],
// searchData: the data to search in. Mostly this is just a copy of
// gd.calcdata, filtered to the subplot and overlays we're on
// but if a point array is supplied it will be a mapping
// of indicated curves
searchData = [],
// [x|y]valArray: the axis values of the hover event
// mapped onto each of the currently selected overlaid subplots
xvalArray,
yvalArray,
// used in loops
itemnum,
curvenum,
cd,
trace,
subploti,
mode,
xval,
yval,
pointData,
closedataPreviousLength;
// Figure out what we're hovering on:
// mouse location or user-supplied data
if(Array.isArray(evt)) {
// user specified an array of points to highlight
hovermode = 'array';
for(itemnum = 0; itemnum<evt.length; itemnum++) {
cd = gd.calcdata[evt[itemnum].curveNumber||0];
searchData.push(cd);
}
}
else {
for(curvenum = 0; curvenum<gd.calcdata.length; curvenum++) {
cd = gd.calcdata[curvenum];
trace = cd[0].trace;
if(subplots.indexOf(getSubplot(trace))!==-1) {
searchData.push(cd);
}
}
// [x|y]px: the pixels (from top left) of the mouse location
// on the currently selected plot area
var xpx, ypx;
// mouse event? ie is there a target element with
// clientX and clientY values?
if(evt.target && ('clientX' in evt) && ('clientY' in evt)) {
// fire the beforehover event and quit if it returns false
// note that we're only calling this on real mouse events, so
// manual calls to fx.hover will always run.
if(Events.triggerHandler(gd, 'plotly_beforehover', evt)===false) {
return;
}
var dbb = evt.target.getBoundingClientRect();
xpx = evt.clientX - dbb.left;
ypx = evt.clientY - dbb.top;
// in case hover was called from mouseout into hovertext,
// it's possible you're not actually over the plot anymore
if(xpx<0 || xpx>dbb.width || ypx<0 || ypx>dbb.height) {
return dragElement.unhoverRaw(gd,evt);
}
}
else {
if('xpx' in evt) xpx = evt.xpx;
else xpx = xaArray[0]._length/2;
if('ypx' in evt) ypx = evt.ypx;
else ypx = yaArray[0]._length/2;
}
if('xval' in evt) xvalArray = flat(subplots, evt.xval);
else xvalArray = p2c(xaArray, xpx);
if('yval' in evt) yvalArray = flat(subplots, evt.yval);
else yvalArray = p2c(yaArray, ypx);
if(!isNumeric(xvalArray[0]) || !isNumeric(yvalArray[0])) {
console.log('Plotly.Fx.hover failed', evt, gd);
return dragElement.unhoverRaw(gd, evt);
}
}
// the pixel distance to beat as a matching point
// in 'x' or 'y' mode this resets for each trace
var distance = Infinity;
// find the closest point in each trace
// this is minimum dx and/or dy, depending on mode
// and the pixel position for the label (labelXpx, labelYpx)
for(curvenum = 0; curvenum<searchData.length; curvenum++) {
cd = searchData[curvenum];
// filter out invisible or broken data
if(!cd || !cd[0] || !cd[0].trace || cd[0].trace.visible !== true) continue;
trace = cd[0].trace;
subploti = subplots.indexOf(getSubplot(trace));
// within one trace mode can sometimes be overridden
mode = hovermode;
// container for new point, also used to pass info into module.hoverPoints
pointData = {
// trace properties
cd: cd,
trace: trace,
xa: xaArray[subploti],
ya: yaArray[subploti],
name: (gd.data.length>1 || trace.hoverinfo.indexOf('name')!==-1) ? trace.name : undefined,
// point properties - override all of these
index: false, // point index in trace - only used by plotly.js hoverdata consumers
distance: Math.min(distance, constants.MAXDIST), // pixel distance or pseudo-distance
color: Color.defaultLine, // trace color
x0: undefined,
x1: undefined,
y0: undefined,
y1: undefined,
xLabelVal: undefined,
yLabelVal: undefined,
zLabelVal: undefined,
text: undefined
};
closedataPreviousLength = hoverData.length;
// for a highlighting array, figure out what
// we're searching for with this element
if(mode==='array') {
var selection = evt[curvenum];
if('pointNumber' in selection) {
pointData.index = selection.pointNumber;
mode = 'closest';
}
else {
mode = '';
if('xval' in selection) {
xval = selection.xval;
mode = 'x';
}
if('yval' in selection) {
yval = selection.yval;
mode = mode ? 'closest' : 'y';
}
}
}
else {
xval = xvalArray[subploti];
yval = yvalArray[subploti];
}
// Now find the points.
if(trace._module && trace._module.hoverPoints) {
var newPoints = trace._module.hoverPoints(pointData, xval, yval, mode);
if(newPoints) {
var newPoint;
for(var newPointNum=0; newPointNum<newPoints.length; newPointNum++) {
newPoint = newPoints[newPointNum];
if(isNumeric(newPoint.x0) && isNumeric(newPoint.y0)) {
hoverData.push(cleanPoint(newPoint, hovermode));
}
}
}
}
else {
console.log('unrecognized trace type in hover', trace);
}
// in closest mode, remove any existing (farther) points
// and don't look any farther than this latest point (or points, if boxes)
if(hovermode==='closest' && hoverData.length > closedataPreviousLength) {
hoverData.splice(0, closedataPreviousLength);
distance = hoverData[0].distance;
}
}
// nothing left: remove all labels and quit
if(hoverData.length===0) return dragElement.unhoverRaw(gd,evt);
// if there's more than one horz bar trace,
// rotate the labels so they don't overlap
var rotateLabels = hovermode==='y' && searchData.length>1;
hoverData.sort(function(d1, d2) { return d1.distance - d2.distance; });
var bgColor = Color.combine(
fullLayout.plot_bgcolor || Color.background,
fullLayout.paper_bgcolor
);
var labelOpts = {
hovermode: hovermode,
rotateLabels: rotateLabels,
bgColor: bgColor,
container: fullLayout._hoverlayer,
outerContainer: fullLayout._paperdiv
};
var hoverLabels = createHoverText(hoverData, labelOpts);
hoverAvoidOverlaps(hoverData, rotateLabels ? 'xa' : 'ya');
alignHoverText(hoverLabels, rotateLabels);
// lastly, emit custom hover/unhover events
var oldhoverdata = gd._hoverdata,
newhoverdata = [];
// pull out just the data that's useful to
// other people and send it to the event
for(itemnum = 0; itemnum<hoverData.length; itemnum++) {
var pt = hoverData[itemnum];
var out = {
data: pt.trace._input,
fullData: pt.trace,
curveNumber: pt.trace.index,
pointNumber: pt.index,
x: pt.xVal,
y: pt.yVal,
xaxis: pt.xa,
yaxis: pt.ya
};
if(pt.zLabelVal!==undefined) out.z = pt.zLabelVal;
newhoverdata.push(out);
}
gd._hoverdata = newhoverdata;
if(!hoverChanged(gd, evt, oldhoverdata)) return;
/* Emit the custom hover handler. Bind this like:
* gd.on('hover.plotly', function(extras) {
* // do something with extras.data
* });
*/
if(oldhoverdata) {
gd.emit('plotly_unhover', { points: oldhoverdata });
}
gd.emit('plotly_hover', {
points: gd._hoverdata,
xaxes: xaArray,
yaxes: yaArray,
xvals: xvalArray,
yvals: yvalArray
});
}
// look for either .subplot (currently just ternary)
// or xaxis and yaxis attributes
function getSubplot(trace) {
return trace.subplot || (trace.xaxis + trace.yaxis);
}
fx.getDistanceFunction = function(mode, dx, dy, dxy) {
if(mode==='closest') return dxy || quadrature(dx, dy);
return mode==='x' ? dx : dy;
};
fx.getClosest = function(cd, distfn, pointData) {
// do we already have a point number? (array mode only)
if(pointData.index!==false) {
if(pointData.index>=0 && pointData.index<cd.length) {
pointData.distance = 0;
}
else pointData.index = false;
}
else {
// apply the distance function to each data point
// this is the longest loop... if this bogs down, we may need
// to create pre-sorted data (by x or y), not sure how to
// do this for 'closest'
for(var i=0; i<cd.length; i++) {
var newDistance = distfn(cd[i]);
if(newDistance <= pointData.distance) {
pointData.index = i;
pointData.distance = newDistance;
}
}
}
return pointData;
};
function cleanPoint(d, hovermode) {
d.posref = hovermode==='y' ? (d.x0+d.x1)/2 : (d.y0+d.y1)/2;
// then constrain all the positions to be on the plot
d.x0 = Lib.constrain(d.x0, 0, d.xa._length);
d.x1 = Lib.constrain(d.x1, 0, d.xa._length);
d.y0 = Lib.constrain(d.y0, 0, d.ya._length);
d.y1 = Lib.constrain(d.y1, 0, d.ya._length);
// and convert the x and y label values into objects
// formatted as text, with font info
var logOffScale;
if(d.xLabelVal!==undefined) {
logOffScale = (d.xa.type==='log' && d.xLabelVal<=0);
var xLabelObj = Axes.tickText(d.xa,
d.xa.c2l(logOffScale ? -d.xLabelVal : d.xLabelVal), 'hover');
if(logOffScale) {
if(d.xLabelVal===0) d.xLabel = '0';
else d.xLabel = '-' + xLabelObj.text;
}
else d.xLabel = xLabelObj.text;
d.xVal = d.xa.c2d(d.xLabelVal);
}
if(d.yLabelVal!==undefined) {
logOffScale = (d.ya.type==='log' && d.yLabelVal<=0);
var yLabelObj = Axes.tickText(d.ya,
d.ya.c2l(logOffScale ? -d.yLabelVal : d.yLabelVal), 'hover');
if(logOffScale) {
if(d.yLabelVal===0) d.yLabel = '0';
else d.yLabel = '-' + yLabelObj.text;
}
else d.yLabel = yLabelObj.text;
d.yVal = d.ya.c2d(d.yLabelVal);
}
if(d.zLabelVal!==undefined) d.zLabel = String(d.zLabelVal);
// for box means and error bars, add the range to the label
if(d.xerr!==undefined) {
var xeText = Axes.tickText(d.xa, d.xa.c2l(d.xerr), 'hover').text;
if(d.xerrneg!==undefined) {
d.xLabel += ' +' + xeText + ' / -' +
Axes.tickText(d.xa, d.xa.c2l(d.xerrneg), 'hover').text;
}
else d.xLabel += ' ± ' + xeText;
// small distance penalty for error bars, so that if there are
// traces with errors and some without, the error bar label will
// hoist up to the point
if(hovermode==='x') d.distance += 1;
}
if(d.yerr!==undefined) {
var yeText = Axes.tickText(d.ya, d.ya.c2l(d.yerr), 'hover').text;
if(d.yerrneg!==undefined) {
d.yLabel += ' +' + yeText + ' / -' +
Axes.tickText(d.ya, d.ya.c2l(d.yerrneg), 'hover').text;
}
else d.yLabel += ' ± ' + yeText;
if(hovermode==='y') d.distance += 1;
}
var infomode = d.trace.hoverinfo;
if(infomode!=='all') {
infomode = infomode.split('+');
if(infomode.indexOf('x')===-1) d.xLabel = undefined;
if(infomode.indexOf('y')===-1) d.yLabel = undefined;
if(infomode.indexOf('z')===-1) d.zLabel = undefined;
if(infomode.indexOf('text')===-1) d.text = undefined;
if(infomode.indexOf('name')===-1) d.name = undefined;
}
return d;
}
fx.loneHover = function(hoverItem, opts) {
// draw a single hover item in a pre-existing svg container somewhere
// hoverItem should have keys:
// - x and y (or x0, x1, y0, and y1):
// the pixel position to mark, relative to opts.container
// - xLabel, yLabel, zLabel, text, and name:
// info to go in the label
// - color:
// the background color for the label. text & outline color will
// be chosen black or white to contrast with this
// opts should have keys:
// - bgColor:
// the background color this is against, used if the trace is
// non-opaque, and for the name, which goes outside the box
// - container:
// a dom <svg> element - must be big enough to contain the whole
// hover label
var pointData = {
color: hoverItem.color || Color.defaultLine,
x0: hoverItem.x0 || hoverItem.x || 0,
x1: hoverItem.x1 || hoverItem.x || 0,
y0: hoverItem.y0 || hoverItem.y || 0,
y1: hoverItem.y1 || hoverItem.y || 0,
xLabel: hoverItem.xLabel,
yLabel: hoverItem.yLabel,
zLabel: hoverItem.zLabel,
text: hoverItem.text,
name: hoverItem.name,
idealAlign: hoverItem.idealAlign,
// filler to make createHoverText happy
trace: {
index: 0,
hoverinfo: ''
},
xa: {_offset: 0},
ya: {_offset: 0},
index: 0
};
var container3 = d3.select(opts.container),
outerContainer3 = opts.outerContainer ?
d3.select(opts.outerContainer) : container3;
var fullOpts = {
hovermode: 'closest',
rotateLabels: false,
bgColor: opts.bgColor || Color.background,
container: container3,
outerContainer: outerContainer3
};
var hoverLabel = createHoverText([pointData], fullOpts);
alignHoverText(hoverLabel, fullOpts.rotateLabels);
return hoverLabel.node();
};
fx.loneUnhover = function(containerOrSelection) {
var selection = containerOrSelection instanceof d3.selection ?
containerOrSelection :
d3.select(containerOrSelection);
selection.selectAll('g.hovertext').remove();
};
function createHoverText(hoverData, opts) {
var hovermode = opts.hovermode,
rotateLabels = opts.rotateLabels,
bgColor = opts.bgColor,
container = opts.container,
outerContainer = opts.outerContainer,
c0 = hoverData[0],
xa = c0.xa,
ya = c0.ya,
commonAttr = hovermode==='y' ? 'yLabel' : 'xLabel',
t0 = c0[commonAttr],
t00 = (String(t0)||'').split(' ')[0],
outerContainerBB = outerContainer.node().getBoundingClientRect(),
outerTop = outerContainerBB.top,
outerWidth = outerContainerBB.width,
outerHeight = outerContainerBB.height;
// show the common label, if any, on the axis
// never show a common label in array mode,
// even if sometimes there could be one
var showCommonLabel = c0.distance<=constants.MAXDIST &&
(hovermode==='x' || hovermode==='y');
// all hover traces hoverinfo must contain the hovermode
// to have common labels
var i, traceHoverinfo;
for(i = 0; i < hoverData.length; i++) {
traceHoverinfo = hoverData[i].trace.hoverinfo;
var parts = traceHoverinfo.split('+');
if(parts.indexOf('all') === -1 &&
parts.indexOf(hovermode) === -1) {
showCommonLabel = false;
break;
}
}
var commonLabel = container.selectAll('g.axistext')
.data(showCommonLabel ? [0] : []);
commonLabel.enter().append('g')
.classed('axistext', true);
commonLabel.exit().remove();
commonLabel.each(function() {
var label = d3.select(this),
lpath = label.selectAll('path').data([0]),
ltext = label.selectAll('text').data([0]);
lpath.enter().append('path')
.style({fill: Color.defaultLine, 'stroke-width': '1px', stroke: Color.background});
ltext.enter().append('text')
.call(Drawing.font, HOVERFONT, HOVERFONTSIZE, Color.background)
// prohibit tex interpretation until we can handle
// tex and regular text together
.attr('data-notex',1);
ltext.text(t0)
.call(svgTextUtils.convertToTspans)
.call(Drawing.setPosition, 0, 0)
.selectAll('tspan.line')
.call(Drawing.setPosition, 0, 0);
label.attr('transform','');
var tbb = ltext.node().getBoundingClientRect();
if(hovermode==='x') {
ltext.attr('text-anchor','middle')
.call(Drawing.setPosition,0,(xa.side==='top' ?
(outerTop-tbb.bottom-HOVERARROWSIZE-HOVERTEXTPAD) :
(outerTop-tbb.top+HOVERARROWSIZE+HOVERTEXTPAD)))
.selectAll('tspan.line')
.attr({
x: ltext.attr('x'),
y: ltext.attr('y')
});
var topsign = xa.side==='top' ? '-' : '';
lpath.attr('d','M0,0'+
'L'+HOVERARROWSIZE+','+topsign+HOVERARROWSIZE+
'H'+(HOVERTEXTPAD+tbb.width/2)+
'v'+topsign+(HOVERTEXTPAD*2+tbb.height)+
'H-'+(HOVERTEXTPAD+tbb.width/2)+
'V'+topsign+HOVERARROWSIZE+'H-'+HOVERARROWSIZE+'Z');
label.attr('transform','translate(' +
(xa._offset+(c0.x0+c0.x1)/2)+',' +
(ya._offset + (xa.side==='top' ? 0 : ya._length))+')');
}
else {
ltext.attr('text-anchor',ya.side==='right' ? 'start' : 'end')
.call(Drawing.setPosition,
(ya.side==='right' ? 1 : -1)*(HOVERTEXTPAD+HOVERARROWSIZE),
outerTop-tbb.top-tbb.height/2)
.selectAll('tspan.line')
.attr({
x: ltext.attr('x'),
y: ltext.attr('y')
});
var leftsign = ya.side==='right' ? '' : '-';
lpath.attr('d','M0,0'+
'L'+leftsign+HOVERARROWSIZE+','+HOVERARROWSIZE+
'V'+(HOVERTEXTPAD+tbb.height/2)+
'h'+leftsign+(HOVERTEXTPAD*2+tbb.width)+
'V-'+(HOVERTEXTPAD+tbb.height/2)+
'H'+leftsign+HOVERARROWSIZE+'V-'+HOVERARROWSIZE+'Z');
label.attr('transform','translate(' +
(xa._offset+(ya.side==='right' ? xa._length : 0))+',' +
(ya._offset+(c0.y0+c0.y1)/2)+')');
}
// remove the "close but not quite" points
// because of error bars, only take up to a space
hoverData = hoverData.filter(function(d) {
return (d.zLabelVal!==undefined) ||
(d[commonAttr]||'').split(' ')[0]===t00;
});
});
// show all the individual labels
// first create the objects
var hoverLabels = container.selectAll('g.hovertext')
.data(hoverData,function(d) {
return [d.trace.index,d.index,d.x0,d.y0,d.name,d.attr,d.xa,d.ya ||''].join(',');
});
hoverLabels.enter().append('g')
.classed('hovertext',true)
.each(function() {
var g = d3.select(this);
// trace name label (rect and text.name)
g.append('rect')
.call(Color.fill, Color.addOpacity(bgColor, 0.8));
g.append('text').classed('name', true)
.call(Drawing.font, HOVERFONT, HOVERFONTSIZE);
// trace data label (path and text.nums)
g.append('path')
.style('stroke-width', '1px');
g.append('text').classed('nums', true)
.call(Drawing.font, HOVERFONT, HOVERFONTSIZE);
});
hoverLabels.exit().remove();
// then put the text in, position the pointer to the data,
// and figure out sizes
hoverLabels.each(function(d) {
var g = d3.select(this).attr('transform', ''),
name = '',
text = '',
// combine possible non-opaque trace color with bgColor
baseColor = Color.opacity(d.color) ?
d.color : Color.defaultLine,
traceColor = Color.combine(baseColor, bgColor),
// find a contrasting color for border and text
contrastColor = tinycolor(traceColor).getBrightness()>128 ?
'#000' : Color.background;
if(d.name && d.zLabelVal===undefined) {
// strip out any html elements from d.name (if it exists at all)
// Note that this isn't an XSS vector, only because it never gets
// attached to the DOM
var tmp = document.createElement('p');
tmp.innerHTML = d.name;
name = tmp.textContent||'';
if(name.length>15) name = name.substr(0,12)+'...';
}
// used by other modules (initially just ternary) that
// manage their own hoverinfo independent of cleanPoint
// the rest of this will still apply, so such modules
// can still put things in (x|y|z)Label, text, and name
// and hoverinfo will still determine their visibility
if(d.extraText!==undefined) text += d.extraText;
if(d.zLabel!==undefined) {
if(d.xLabel!==undefined) text += 'x: ' + d.xLabel + '<br>';
if(d.yLabel!==undefined) text += 'y: ' + d.yLabel + '<br>';
text += (text ? 'z: ' : '') + d.zLabel;
}
else if(showCommonLabel && d[hovermode+'Label']===t0) {
text = d[(hovermode==='x' ? 'y' : 'x') + 'Label'] || '';
}
else if(d.xLabel===undefined) {
if(d.yLabel!==undefined) text = d.yLabel;
}
else if(d.yLabel===undefined) text = d.xLabel;
else text = '('+d.xLabel+', '+d.yLabel+')';
if(d.text && !Array.isArray(d.text)) text += (text ? '<br>' : '') + d.text;
// if 'text' is empty at this point,
// put 'name' in main label and don't show secondary label
if(text === '') {
// if 'name' is also empty, remove entire label
if(name === '') g.remove();
text = name;
}
// main label
var tx = g.select('text.nums')
.style('fill',contrastColor)
.call(Drawing.setPosition,0,0)
.text(text)
.attr('data-notex',1)
.call(svgTextUtils.convertToTspans);
tx.selectAll('tspan.line')
.call(Drawing.setPosition,0,0);
var tx2 = g.select('text.name'),
tx2width = 0;
// secondary label for non-empty 'name'
if(name && name!==text) {
tx2.style('fill',traceColor)
.text(name)
.call(Drawing.setPosition,0,0)
.attr('data-notex',1)
.call(svgTextUtils.convertToTspans);
tx2.selectAll('tspan.line')
.call(Drawing.setPosition,0,0);
tx2width = tx2.node().getBoundingClientRect().width+2*HOVERTEXTPAD;
}
else {
tx2.remove();
g.select('rect').remove();
}
g.select('path')