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Mixed chart #5134

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Mixed chart #5134

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619d1f6
Better mixed graph support
loicbourgois Jan 10, 2018
ee8e195
Set back lineEnabled()
loicbourgois Jan 11, 2018
76b13d1
Move bar scale default value check to getIndexScale()
loicbourgois Jan 11, 2018
cd75f9b
Improved mixed charts with support for empty main type
loicbourgois Jan 12, 2018
1a32e89
Add example for mixed charts
loicbourgois Jan 12, 2018
7cdd680
Add example for mixed charts
loicbourgois Jan 12, 2018
a01f580
Rollback controller.bar.js
loicbourgois Jan 12, 2018
042920e
Update mixed chart example
loicbourgois Jan 12, 2018
05669ed
Add more samples + Remove duplicated code
loicbourgois Jan 13, 2018
2f9727b
Always merge child options to parent
loicbourgois Jan 13, 2018
6e84627
Merge branch 'master' of https://github.com/chartjs/Chart.js into mixed
loicbourgois Jan 14, 2018
de80075
Add test + Generalize controller and sample
loicbourgois Jan 14, 2018
f24d979
Add test + Generalize controller and sample
loicbourgois Jan 14, 2018
8ea9ee6
Make sure the all the chart options are taken into account
loicbourgois Jan 14, 2018
32f14aa
Update example
loicbourgois Jan 14, 2018
892dc15
Simplify merging
loicbourgois Jan 14, 2018
25119d4
Revert changes for scatter and line controllers
loicbourgois Jan 14, 2018
780f4eb
Add check for type
loicbourgois Jan 15, 2018
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122 changes: 122 additions & 0 deletions samples/charts/mixed-chart.html
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Original file line number Diff line number Diff line change
@@ -0,0 +1,122 @@
<!doctype html>
<html>

<head>
<title>Mixed Chart</title>
<script src="../../dist/Chart.bundle.js"></script>
<script src="../utils.js"></script>
<style>
canvas {
-moz-user-select: none;
-webkit-user-select: none;
-ms-user-select: none;
}
div {
display: flex;
flex-wrap: wrap;
}
div div {
flex-grow: 1;
width: 30%;
margin: 0.5em;
height: 20em;
min-width: 25em;
}
</style>
</head>

<body>
<button id="randomizeData">Randomize Data</button>
<div id="container">
</div>
<script>
var parents = ['scatter', 'line', 'bubble', 'bar', 'horizontalBar', undefined];
var childs = [
{type:'scatter', color:'#f844'},
{type:'scatter', color:'#f844'},
{type:'line', color:'#4f84', fill:false},
{type:'bubble', color:'#8f44'},
{type:'line', color:'#f484'},
{type:'bar', color:'#48f4'},
{type:'bar', color:'#84f4'},
//{type:'horizontalBar', color:'#84f4'} // not supported yet
]
var size = 8;
var charts = [];
parents.forEach(function(parent) {
var datasets = [];
var c = -1;
var labels = [];
childs.forEach(function(child) {
c++;
var data = [];
for(var i = 0 ; i < size ; i++) {
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if(child.type === 'bubble') {
data.push({x:randomScalingFactor(), y:randomScalingFactor(),r:Math.max(randomScalingFactor()/2, 20)});
} else {
data.push(randomScalingFactor());
}
if(!c) {
labels.push('label '+(i+1));
}
}
datasets.push({
type: child.type,
label: child.type,
borderColor: child.color,
backgroundColor: child.color,
data: data,
});
if(child.fill !== undefined) {
datasets[datasets.length-1].fill = child.fill;
}
});
var div = document.createElement("div");
var canvas = document.createElement("canvas");
canvas.id = parent;
div.appendChild(canvas);
document.getElementById("container").appendChild(div);
var str = '';
childs.forEach(function(child) {
str += child.type + ', ';
})
str = str.slice(0,-2);
charts.push(new Chart(canvas.getContext("2d"), {
type: parent,
data: {
labels: labels,
datasets: datasets,
},
options: {
responsive: true,
title: {
display: true,
text: 'Main type : ' + parent + ' | Childs : ' + str,
},
tooltips: {
mode: 'index',
intersect: true
}
}
}));
});
console.log(charts);
document.getElementById('randomizeData').addEventListener('click', function() {

charts.forEach(function(chart) {
chart.data.datasets.forEach(function(dataset) {
dataset.data = dataset.data.map(function(a) {
if(a.r) {
return {x:randomScalingFactor(),y:randomScalingFactor(),r:Math.max(randomScalingFactor()/3, 10)};
}
return randomScalingFactor();
});
});
chart.update();
});
console.log(charts);
});
</script>
</body>

</html>
3 changes: 3 additions & 0 deletions samples/samples.js
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Expand Up @@ -82,6 +82,9 @@
}, {
title: 'Combo bar/line',
path: 'charts/combo-bar-line.html'
}, {
title: 'Mixed',
path: 'charts/mixed-chart.html'
}]
}, {
title: 'Linear scale',
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11 changes: 8 additions & 3 deletions src/controllers/controller.line.js
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Expand Up @@ -46,7 +46,7 @@ module.exports = function(Chart) {
var scale = me.getScaleForId(meta.yAxisID);
var i, ilen, custom;
var dataset = me.getDataset();
var showLine = lineEnabled(dataset, options);
var showLine = this.lineEnabled(dataset, options);

// Update Line
if (showLine) {
Expand Down Expand Up @@ -287,7 +287,7 @@ module.exports = function(Chart) {

helpers.canvas.clipArea(chart.ctx, area);

if (lineEnabled(me.getDataset(), chart.options)) {
if (this.lineEnabled(me.getDataset(), chart.options)) {
meta.dataset.draw();
}

Expand Down Expand Up @@ -328,6 +328,11 @@ module.exports = function(Chart) {
model.backgroundColor = me.getPointBackgroundColor(point, index);
model.borderColor = me.getPointBorderColor(point, index);
model.borderWidth = me.getPointBorderWidth(point, index);
}
},

lineEnabled: function(dataset, options) {
return lineEnabled(dataset, options);
},

});
};
6 changes: 5 additions & 1 deletion src/controllers/controller.scatter.js
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Expand Up @@ -37,6 +37,10 @@ defaults._set('scatter', {
module.exports = function(Chart) {

// Scatter charts use line controllers
Chart.controllers.scatter = Chart.controllers.line;
Chart.controllers.scatter = Chart.controllers.line.extend({
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What's the reason for overriding and returning false here? Shouldn't that have already happened?

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@loicbourgois loicbourgois Jan 12, 2018 •
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From what i understand, with mixed chart, the default style applied is the style of the 'main' chart.
And for now, only bar or line are valid main types.
So the option showLines is never set to false. You'd have to do it manually in the child chart.
You can try commenting the line n°8187 and n°19040 in this codepen
And you can check the console for Chart.config.data.datasets[0].showLine.

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But now that I think about it, is being able to show lines in a scatter chart a wanted feature ?
If so, then this overriding would break it.

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I think lines on a scatter chart is something that should be possible and its currently the default behaviour

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So does that mean a test should be added via another PR to make sure it stays that way in the future ?

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I would think adding a test to ensure that a scatter chart can optionally use a line or not is a good idea. @simonbrunel thoughts?

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I don't see why scatter charts couldn't display lines, so yes these lineEnabled changes should be reverted. We could add a test indeed, but in a different PR.

lineEnabled: function() {
return false;
},
});

};
66 changes: 65 additions & 1 deletion src/core/core.controller.js
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Expand Up @@ -31,10 +31,74 @@ module.exports = function(Chart) {
data.datasets = data.datasets || [];
data.labels = data.labels || [];

config.options = helpers.configMerge(

// Merge options for mixed charts
// [1] Does not work if axes are stacked
// [2] Only triggered if there are at least 2 different types
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// [3] If there is at least one 'bar' chart, main type is set to 'bar'
// [4] If the main chart has no type and there's no 'bar' child chart,
// we set the main chart to 'line'
// This way, users can use a mixed chart without having to set a main type
var isStacked = false;
var optionstmp = helpers.configMerge(
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defaults.global,
defaults[config.type],
config.options || {});
if (optionstmp && optionstmp.scales && optionstmp.scales.xAxes && optionstmp.scales.yAxes) {
optionstmp.scales.xAxes.forEach(function(axe) {
if (axe.stacked === true) {
isStacked = true; // [1]
}
});
optionstmp.scales.yAxes.forEach(function(axe) {
if (axe.stacked === true) {
isStacked = true; // [1]
}
});
}

var alreadyMerged = false;
if (!isStacked && data && data.datasets && data.datasets.length >= 2) { // [2]
var type = null;
var isMixed = false;
var hasBarType = false;
data.datasets.forEach(function(dataset) {
if (type && dataset.type && type !== dataset.type) {
isMixed = true; // [2]
} else if (dataset.type) {
type = dataset.type;
}
if (dataset.type === 'bar') {
hasBarType = true;
}
});
if (isMixed) {
if (hasBarType) { // [3]
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config.options = helpers.configMerge(
defaults.global,
defaults.bar,
config.options || {});
} else {
config.options = helpers.configMerge(
defaults.global,
defaults[config.type || 'line'], // [4]
config.options || {});
}

data.datasets.forEach(function(dataset) {
config.options = helpers.configMerge(defaults[dataset.type], config.options || {});
});
alreadyMerged = true;
}
}

// Merge
if (!alreadyMerged) {
config.options = helpers.configMerge(
defaults.global,
defaults[config.type],
config.options || {});
}

return config;
}
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3 changes: 3 additions & 0 deletions src/core/core.scale.js
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Expand Up @@ -148,6 +148,9 @@ module.exports = function(Chart) {
// Any function can be extended by the scale type

mergeTicksOptions: function() {
if (!this.options.ticks) {
return;
}
var ticks = this.options.ticks;
if (ticks.minor === false) {
ticks.minor = {
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