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Output bounding box to hover event data #5512

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merged 19 commits into from
Aug 26, 2021
Merged

Output bounding box to hover event data #5512

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4573f34
Output bounding box to hover event data
rreusser Feb 18, 2021
e817828
Merge remote-tracking branch 'origin/master' into external-hover-2
archmoj Aug 25, 2021
86a4fbe
draft log for PR 5512
archmoj Aug 25, 2021
4b04337
fix syntax
archmoj Aug 25, 2021
034779d
rename top and left variables
archmoj Aug 25, 2021
9a57ec3
adjust jasmine tests
archmoj Aug 25, 2021
6078118
drop extra sort
archmoj Aug 25, 2021
03b22ec
revise bbox positions
archmoj Aug 25, 2021
17dbadd
ensure x0 <= x1 and y0 <= y1
archmoj Aug 26, 2021
bd6688e
interactive test
archmoj Aug 26, 2021
ccd2c88
handle gl3d, pie, sunburst, treemap, etc.
archmoj Aug 26, 2021
c41b31d
drop hover bbox display
archmoj Aug 26, 2021
888a6ba
add jasmine tests for cartesian
archmoj Aug 26, 2021
8100f8a
provide bbox in gl3d event data
archmoj Aug 26, 2021
262505d
bbox for pie and funnelarea
archmoj Aug 26, 2021
53e1b61
provide bbox for sunburst treemap and icicle
archmoj Aug 26, 2021
aa00c18
improve bbox for sunburst, treemap and icicle slices
archmoj Aug 26, 2021
9716d7e
improve bbox for pie slices
archmoj Aug 26, 2021
6ba88db
improve bbox for funnelarea slices
archmoj Aug 26, 2021
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5 changes: 5 additions & 0 deletions src/components/fx/helpers.js
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Original file line number Diff line number Diff line change
Expand Up @@ -138,6 +138,11 @@ exports.makeEventData = function(pt, trace, cd) {
if('yVal' in pt) out.y = pt.yVal;
else if('y' in pt) out.y = pt.y;

if ('x0' in pt) out.x0 = pt.x0;
if ('x1' in pt) out.x1 = pt.x1;
if ('y0' in pt) out.y0 = pt.y0;
if ('y1' in pt) out.y1 = pt.y1;
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🌴 there's 7 or 8 of these... could be something like copyCoords(pt, out) - could even include the xa/ya-> xaxis/yaxis part, AFAICT only scattercarpet is missing that one, but I bet it wouldn't even hurt to include that.

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Is that information already accessible through plotly_hover? If so, can't we just modify dcc.Graph instead of making this PR?

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The original mouse event is accessible in plotly_hover, and that contains the pointer location in various coordinate systems. But plotly.js hover events are more sophisticated, and it would be far better if we can match the plotly.js behavior with our new interface.

  • These coordinates mark the data points rather than the mouse.
  • We give the full extent of the location being hovered on. For example, for a vertical bar this is the left and right edges of the top of the bar. For a scatter trace, this is the bounding box of the marker.
  • There can be multiple points in the hover set, each with their own bounding box.


if(pt.xa) out.xaxis = pt.xa;
if(pt.ya) out.yaxis = pt.ya;
if(pt.zLabelVal !== undefined) out.z = pt.zLabelVal;
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14 changes: 14 additions & 0 deletions src/components/fx/hover.js
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Original file line number Diff line number Diff line change
Expand Up @@ -680,6 +680,12 @@ function _hover(gd, evt, subplot, noHoverEvent) {
var oldhoverdata = gd._hoverdata;
var newhoverdata = [];

// Top/left hover offsets relative to graph div. As long as hover content is
// a sibling of the graph div, it will be positioned correctly relative to
// the offset parent, whatever that may be.
var hot = gd.offsetTop + gd.clientTop;
var hol = gd.offsetLeft + gd.clientLeft;

// pull out just the data that's useful to
// other people and send it to the event
for(itemnum = 0; itemnum < hoverData.length; itemnum++) {
Expand All @@ -694,6 +700,14 @@ function _hover(gd, evt, subplot, noHoverEvent) {
pt.hovertemplate = ht || pt.trace.hovertemplate || false;
}

var bbox = {};
eventData.bbox = bbox;

if ('x0' in pt) bbox.x0 = hol + pt.x0 + pt.xa._offset;
if ('x1' in pt) bbox.x1 = hol + pt.x1 + pt.xa._offset;
if ('y0' in pt) bbox.y0 = hot + pt.y0 + pt.ya._offset;
if ('y1' in pt) bbox.y1 = hot + pt.y1 + pt.ya._offset;

pt.eventData = [eventData];
newhoverdata.push(eventData);
}
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5 changes: 5 additions & 0 deletions src/traces/bar/event_data.js
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Expand Up @@ -7,6 +7,11 @@ module.exports = function eventData(out, pt, trace) {
if(pt.xa) out.xaxis = pt.xa;
if(pt.ya) out.yaxis = pt.ya;

if ('x0' in pt) out.x0 = pt.x0;
if ('x1' in pt) out.x1 = pt.x1;
if ('y0' in pt) out.y0 = pt.y0;
if ('y1' in pt) out.y1 = pt.y1;

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Do we need x0 , x1, y0 and y1 in event data? Having bbox in not enough?

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I think we concluded that more was better here, to make it easier for folks in Dash-land.

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Is this correct? For vertical bars y0 is equal to y1 here and in the bbox.

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Shouldn't p0, p1, s0 and s1 used instead of (x|y) (0|1)?

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For vertical bars y0 is equal to y1

Yes, y0===y1 for vertical bars. We want the label to be at the end of the bar, not in the middle.

Shouldn't p0, p1, s0 and s1 used instead

The final event data should contain x/y. p/s is not useful to the user for positioning other elements, and that's the purpose here.

if(trace.orientation === 'h') {
out.label = out.y;
out.value = out.x;
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5 changes: 5 additions & 0 deletions src/traces/box/event_data.js
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Original file line number Diff line number Diff line change
Expand Up @@ -11,5 +11,10 @@ module.exports = function eventData(out, pt) {
if(pt.xa) out.xaxis = pt.xa;
if(pt.ya) out.yaxis = pt.ya;

if ('x0' in pt) out.x0 = pt.x0;
if ('x1' in pt) out.x1 = pt.x1;
if ('y0' in pt) out.y0 = pt.y0;
if ('y1' in pt) out.y1 = pt.y1;

return out;
};
5 changes: 5 additions & 0 deletions src/traces/funnel/event_data.js
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Expand Up @@ -13,5 +13,10 @@ module.exports = function eventData(out, pt /* , trace, cd, pointNumber */) {
if(pt.xa) out.xaxis = pt.xa;
if(pt.ya) out.yaxis = pt.ya;

if ('x0' in pt) out.x0 = pt.x0;
if ('x1' in pt) out.x1 = pt.x1;
if ('y0' in pt) out.y0 = pt.y0;
if ('y1' in pt) out.y1 = pt.y1;

return out;
};
5 changes: 5 additions & 0 deletions src/traces/histogram/event_data.js
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Expand Up @@ -11,6 +11,11 @@ module.exports = function eventData(out, pt, trace, cd, pointNumber) {
if(pt.xa) out.xaxis = pt.xa;
if(pt.ya) out.yaxis = pt.ya;

if ('x0' in pt) out.x0 = pt.x0;
if ('x1' in pt) out.x1 = pt.x1;
if ('y0' in pt) out.y0 = pt.y0;
if ('y1' in pt) out.y1 = pt.y1;

// specific to histogram - CDFs do not have pts (yet?)
if(!(trace.cumulative || {}).enabled) {
var pts = Array.isArray(pointNumber) ?
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6 changes: 6 additions & 0 deletions src/traces/image/event_data.js
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Expand Up @@ -3,6 +3,12 @@
module.exports = function eventData(out, pt) {
if('xVal' in pt) out.x = pt.xVal;
if('yVal' in pt) out.y = pt.yVal;

if ('x0' in pt) out.x0 = pt.x0;
if ('x1' in pt) out.x1 = pt.x1;
if ('y0' in pt) out.y0 = pt.y0;
if ('y1' in pt) out.y1 = pt.y1;

if(pt.xa) out.xaxis = pt.xa;
if(pt.ya) out.yaxis = pt.ya;
out.color = pt.color;
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11 changes: 10 additions & 1 deletion src/traces/pie/event_data.js
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Expand Up @@ -18,7 +18,16 @@ module.exports = function eventData(pt, trace) {
text: pt.text,

// pt.v (and pt.i below) for backward compatibility
v: pt.v
v: pt.v,

// TODO: These coordinates aren't quite correct and don't take into account some offset
// I still haven't quite located (similar to xa._offset)
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If this doesn't work correctly yet, can we just drop it and leave pie as a TODO?

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Addressed in 03b22ec.

bbox: {
x0: pt.x0,
x1: pt.x1,
y0: pt.y0,
y1: pt.y1,
},
};

// Only include pointNumber if it's unambiguous
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20 changes: 14 additions & 6 deletions src/traces/pie/plot.js
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Expand Up @@ -379,12 +379,20 @@ function attachFxHandlers(sliceTop, gd, cd) {

if(hoverinfo === 'all') hoverinfo = 'label+text+value+percent+name';

// If hoverinfo === 'none', we still want the *coordinates* of hover to be
// output, just not the hover to actually display
var rInscribed = pt.rInscribed || 0;
var hoverCenterX = cx + pt.pxmid[0] * (1 - rInscribed);
var hoverCenterY = cy + pt.pxmid[1] * (1 - rInscribed);
pt.x0 = hoverCenterX - rInscribed * cd0.r;
pt.x1 = hoverCenterX + rInscribed * cd0.r;
pt.y0 = hoverCenterY;
pt.y1 = hoverCenterY;

// in case we dragged over the pie from another subplot,
// or if hover is turned off
if(trace2.hovertemplate || (hoverinfo !== 'none' && hoverinfo !== 'skip' && hoverinfo)) {
var rInscribed = pt.rInscribed || 0;
var hoverCenterX = cx + pt.pxmid[0] * (1 - rInscribed);
var hoverCenterY = cy + pt.pxmid[1] * (1 - rInscribed);

var separators = fullLayout2.separators;
var text = [];

Expand All @@ -406,9 +414,9 @@ function attachFxHandlers(sliceTop, gd, cd) {

Fx.loneHover({
trace: trace,
x0: hoverCenterX - rInscribed * cd0.r,
x1: hoverCenterX + rInscribed * cd0.r,
y: hoverCenterY,
x0: pt.x0,
x1: pt.x1,
y: pt.y0,
text: text.join('<br>'),
name: (trace2.hovertemplate || hoverinfo.indexOf('name') !== -1) ? trace2.name : undefined,
idealAlign: pt.pxmid[0] < 0 ? 'left' : 'right',
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5 changes: 5 additions & 0 deletions src/traces/scattercarpet/event_data.js
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Expand Up @@ -7,5 +7,10 @@ module.exports = function eventData(out, pt, trace, cd, pointNumber) {
out.b = cdi.b;
out.y = cdi.y;

if ('x0' in pt) out.x0 = pt.x0;
if ('x1' in pt) out.x1 = pt.x1;
if ('y0' in pt) out.y0 = pt.y0;
if ('y1' in pt) out.y1 = pt.y1;

return out;
};
5 changes: 5 additions & 0 deletions src/traces/scatterternary/event_data.js
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Expand Up @@ -4,6 +4,11 @@ module.exports = function eventData(out, pt, trace, cd, pointNumber) {
if(pt.xa) out.xaxis = pt.xa;
if(pt.ya) out.yaxis = pt.ya;

if ('x0' in pt) out.x0 = pt.x0;
if ('x1' in pt) out.x1 = pt.x1;
if ('y0' in pt) out.y0 = pt.y0;
if ('y1' in pt) out.y1 = pt.y1;

if(cd[pointNumber]) {
var cdi = cd[pointNumber];

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5 changes: 5 additions & 0 deletions src/traces/waterfall/event_data.js
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Expand Up @@ -13,5 +13,10 @@ module.exports = function eventData(out, pt /* , trace, cd, pointNumber */) {
if(pt.xa) out.xaxis = pt.xa;
if(pt.ya) out.yaxis = pt.ya;

if ('x0' in pt) out.x0 = pt.x0;
if ('x1' in pt) out.x1 = pt.x1;
if ('y0' in pt) out.y0 = pt.y0;
if ('y1' in pt) out.y1 = pt.y1;

return out;
};