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fix support for typed arrays in bar 'width' and 'offset' #3169

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Merged
merged 2 commits into from
Oct 29, 2018
Merged

fix support for typed arrays in bar 'width' and 'offset' #3169

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ec6eed2
fix support for typed arrays in bar 'width' and 'offset'
etpinard Oct 26, 2018
5f4672c
fix typos in test descriptions
etpinard Oct 29, 2018
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8 changes: 4 additions & 4 deletions src/traces/bar/cross_trace_calc.js
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Original file line number Diff line number Diff line change
Expand Up @@ -356,7 +356,7 @@ function applyAttributes(sieve) {

if(isArrayOrTypedArray(offset)) {
// if offset is an array, then clone it into t.poffset.
newPoffset = offset.slice(0, calcTrace.length);
newPoffset = Array.prototype.slice.call(offset, 0, calcTrace.length);

// guard against non-numeric items
for(j = 0; j < newPoffset.length; j++) {
Expand All @@ -377,12 +377,12 @@ function applyAttributes(sieve) {
t.poffset = offset;
}

var width = fullTrace._width || fullTrace.width,
initialBarwidth = t.barwidth;
var width = fullTrace._width || fullTrace.width;
var initialBarwidth = t.barwidth;

if(isArrayOrTypedArray(width)) {
// if width is an array, then clone it into t.barwidth.
var newBarwidth = width.slice(0, calcTrace.length);
var newBarwidth = Array.prototype.slice.call(width, 0, calcTrace.length);

// guard against non-numeric items
for(j = 0; j < newBarwidth.length; j++) {
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40 changes: 40 additions & 0 deletions test/jasmine/tests/bar_test.js
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Original file line number Diff line number Diff line change
Expand Up @@ -397,6 +397,46 @@ describe('Bar.crossTraceCalc (formerly known as setPositions)', function() {
assertArrayField(cd[2][0], 't.poffset', [-0.4]);
});

it('should work with *width* typed arrays', function() {
var w = [0.1, 0.4, 0.7];

var gd = mockBarPlot([{
width: w,
y: [1, 2, 3]
}, {
width: new Float32Array(w),
y: [1, 2, 3]
}]);

var cd = gd.calcdata;
assertArrayField(cd[0][0], 't.barwidth', w);
assertArrayField(cd[1][0], 't.barwidth', w);
assertPointField(cd, 'x', [
[-0.2, 0.8, 1.8],
[0.2, 1.2, 2.2]
]);
});

it('should work with *offset* typed arrays', function() {
var o = [0.1, 0.4, 0.7];

var gd = mockBarPlot([{
offset: o,
y: [1, 2, 3]
}, {
offset: new Float32Array(o),
y: [1, 2, 3]
}]);

var cd = gd.calcdata;
assertArrayField(cd[0][0], 't.poffset', o);
assertArrayField(cd[1][0], 't.poffset', o);
assertPointField(cd, 'x', [
[0.5, 1.8, 3.1],
[0.5, 1.8, 3.099]
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Huh, took me a while to figure out where these numbers came from... surprised I had never noticed this before but it seems weird that offset sets the left edge of each bar rather than its center. Oh well, a little late to change that. Why does the second one get 3.099 instead of 3.1?

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I'm not sure.

With a regular array, we get:

[0.5, 1.7999999999999998, 3.1]

with a typed array, we get:

[0.5000000014901161, 1.8000000059604644, 3.099999988079071]

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ah ok, that's just because it's a Float32Array ie single precision, not double. But it's still closer to 3.1 than to 3.099 😏

]);
});

it('should guard against invalid width items', function() {
var gd = mockBarPlot([{
width: [null, 1, 0.8],
Expand Down