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New sample: Progressive Line With Easing (#9798)
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# Progressive Line With Easing | ||
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```js chart-editor | ||
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// <block:data:2> | ||
const data = []; | ||
const data2 = []; | ||
let prev = 100; | ||
let prev2 = 80; | ||
for (let i = 0; i < 1000; i++) { | ||
prev += 5 - Math.random() * 10; | ||
data.push({x: i, y: prev}); | ||
prev2 += 5 - Math.random() * 10; | ||
data2.push({x: i, y: prev2}); | ||
} | ||
// </block:data> | ||
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// <block:animation:1> | ||
let easing = helpers.easingEffects.easeOutQuad; | ||
let restart = false; | ||
const totalDuration = 5000; | ||
const duration = (ctx) => easing(ctx.index / data.length) * totalDuration / data.length; | ||
const delay = (ctx) => easing(ctx.index / data.length) * totalDuration; | ||
const previousY = (ctx) => ctx.index === 0 ? ctx.chart.scales.y.getPixelForValue(100) : ctx.chart.getDatasetMeta(ctx.datasetIndex).data[ctx.index - 1].getProps(['y'], true).y; | ||
const animation = { | ||
x: { | ||
type: 'number', | ||
easing: 'linear', | ||
duration: duration, | ||
from: NaN, // the point is initially skipped | ||
delay(ctx) { | ||
if (ctx.type !== 'data' || ctx.xStarted) { | ||
return 0; | ||
} | ||
ctx.xStarted = true; | ||
return delay(ctx); | ||
} | ||
}, | ||
y: { | ||
type: 'number', | ||
easing: 'linear', | ||
duration: duration, | ||
from: previousY, | ||
delay(ctx) { | ||
if (ctx.type !== 'data' || ctx.yStarted) { | ||
return 0; | ||
} | ||
ctx.yStarted = true; | ||
return delay(ctx); | ||
} | ||
} | ||
}; | ||
// </block:animation> | ||
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// <block:config:0> | ||
const config = { | ||
type: 'line', | ||
data: { | ||
datasets: [{ | ||
borderColor: Utils.CHART_COLORS.red, | ||
borderWidth: 1, | ||
radius: 0, | ||
data: data, | ||
}, | ||
{ | ||
borderColor: Utils.CHART_COLORS.blue, | ||
borderWidth: 1, | ||
radius: 0, | ||
data: data2, | ||
}] | ||
}, | ||
options: { | ||
animation, | ||
interaction: { | ||
intersect: false | ||
}, | ||
plugins: { | ||
legend: false, | ||
title: { | ||
display: true, | ||
text: () => easing.name | ||
} | ||
}, | ||
scales: { | ||
x: { | ||
type: 'linear' | ||
} | ||
} | ||
} | ||
}; | ||
// </block:config> | ||
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// <block:actions:2> | ||
function restartAnims(chart) { | ||
chart.stop(); | ||
const meta0 = chart.getDatasetMeta(0); | ||
const meta1 = chart.getDatasetMeta(1); | ||
for (let i = 0; i < data.length; i++) { | ||
const ctx0 = meta0.controller.getContext(i); | ||
const ctx1 = meta1.controller.getContext(i); | ||
ctx0.xStarted = ctx0.yStarted = false; | ||
ctx1.xStarted = ctx1.yStarted = false; | ||
} | ||
chart.update(); | ||
} | ||
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const actions = [ | ||
{ | ||
name: 'easeOutQuad', | ||
handler(chart) { | ||
easing = helpers.easingEffects.easeOutQuad; | ||
restartAnims(chart); | ||
} | ||
}, | ||
{ | ||
name: 'easeOutCubic', | ||
handler(chart) { | ||
easing = helpers.easingEffects.easeOutCubic; | ||
restartAnims(chart); | ||
} | ||
}, | ||
{ | ||
name: 'easeOutQuart', | ||
handler(chart) { | ||
easing = helpers.easingEffects.easeOutQuart; | ||
restartAnims(chart); | ||
} | ||
}, | ||
{ | ||
name: 'easeOutQuint', | ||
handler(chart) { | ||
easing = helpers.easingEffects.easeOutQuint; | ||
restartAnims(chart); | ||
} | ||
}, | ||
{ | ||
name: 'easeInQuad', | ||
handler(chart) { | ||
easing = helpers.easingEffects.easeInQuad; | ||
restartAnims(chart); | ||
} | ||
}, | ||
{ | ||
name: 'easeInCubic', | ||
handler(chart) { | ||
easing = helpers.easingEffects.easeInCubic; | ||
restartAnims(chart); | ||
} | ||
}, | ||
{ | ||
name: 'easeInQuart', | ||
handler(chart) { | ||
easing = helpers.easingEffects.easeInQuart; | ||
restartAnims(chart); | ||
} | ||
}, | ||
{ | ||
name: 'easeInQuint', | ||
handler(chart) { | ||
easing = helpers.easingEffects.easeInQuint; | ||
restartAnims(chart); | ||
} | ||
}, | ||
]; | ||
// </block:actions> | ||
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module.exports = { | ||
config, | ||
actions | ||
}; | ||
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``` |
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// Add helpers needed in samples here. | ||
// Usable through `helpers[name]`. | ||
export {color, getHoverColor} from '../../dist/helpers.esm'; | ||
export {color, getHoverColor, easingEffects} from '../../dist/helpers.esm'; | ||
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