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Add example plugins for border and quadrants (#8942)
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# Chart Area Border | ||
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```js chart-editor | ||
// <block:data:2> | ||
const DATA_COUNT = 7; | ||
const NUMBER_CFG = {count: DATA_COUNT, min: -100, max: 100}; | ||
const labels = Utils.months({count: 7}); | ||
const data = { | ||
labels: labels, | ||
datasets: [ | ||
{ | ||
label: 'Dataset 1', | ||
data: Utils.numbers(NUMBER_CFG), | ||
borderColor: Utils.CHART_COLORS.red, | ||
backgroundColor: Utils.transparentize(Utils.CHART_COLORS.red, 0.5), | ||
}, | ||
{ | ||
label: 'Dataset 2', | ||
data: Utils.numbers(NUMBER_CFG), | ||
borderColor: Utils.CHART_COLORS.blue, | ||
backgroundColor: Utils.transparentize(Utils.CHART_COLORS.blue, 0.5), | ||
} | ||
] | ||
}; | ||
// </block:data> | ||
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// <block:plugin:1> | ||
const chartAreaBorder = { | ||
id: 'chartAreaBorder', | ||
beforeDraw(chart, args, options) { | ||
const {ctx, chartArea: {left, top, width, height}} = chart; | ||
ctx.save(); | ||
ctx.strokeStyle = options.borderColor; | ||
ctx.lineWidth = options.borderWidth; | ||
ctx.setLineDash(options.borderDash || []); | ||
ctx.lineDashOffset = options.borderDashOffset; | ||
ctx.strokeRect(left, top, width, height); | ||
ctx.restore(); | ||
} | ||
}; | ||
// </block:plugin> | ||
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// <block:config:0> | ||
const config = { | ||
type: 'line', | ||
data: data, | ||
options: { | ||
plugins: { | ||
chartAreaBorder: { | ||
borderColor: 'red', | ||
borderWidth: 2, | ||
borderDash: [5, 5], | ||
borderDashOffset: 2, | ||
} | ||
} | ||
}, | ||
plugins: [chartAreaBorder] | ||
}; | ||
// </block:config> | ||
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module.exports = { | ||
config: config, | ||
}; |
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# Quadrants | ||
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```js chart-editor | ||
// <block:data:2> | ||
const DATA_COUNT = 7; | ||
const NUMBER_CFG = {count: DATA_COUNT, min: -100, max: 100}; | ||
const data = { | ||
datasets: [ | ||
{ | ||
label: 'Dataset 1', | ||
data: Utils.points(NUMBER_CFG), | ||
borderColor: Utils.CHART_COLORS.red, | ||
backgroundColor: Utils.transparentize(Utils.CHART_COLORS.red, 0.5), | ||
}, | ||
{ | ||
label: 'Dataset 2', | ||
data: Utils.points(NUMBER_CFG), | ||
borderColor: Utils.CHART_COLORS.blue, | ||
backgroundColor: Utils.transparentize(Utils.CHART_COLORS.blue, 0.5), | ||
} | ||
] | ||
}; | ||
// </block:data> | ||
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// <block:plugin:1> | ||
const quadrants = { | ||
id: 'quadrants', | ||
beforeDraw(chart, args, options) { | ||
const {ctx, chartArea: {left, top, right, bottom}, scales: {x, y}} = chart; | ||
const midX = x.getPixelForValue(0); | ||
const midY = y.getPixelForValue(0); | ||
ctx.save(); | ||
ctx.fillStyle = options.topLeft; | ||
ctx.fillRect(left, top, midX - left, midY - top); | ||
ctx.fillStyle = options.topRight; | ||
ctx.fillRect(midX, top, right - midX, midY - top); | ||
ctx.fillStyle = options.bottomRight; | ||
ctx.fillRect(midX, midY, right - midX, bottom - midY); | ||
ctx.fillStyle = options.bottomLeft; | ||
ctx.fillRect(left, midY, midX - left, bottom - midY); | ||
ctx.restore(); | ||
} | ||
}; | ||
// </block:plugin> | ||
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// <block:config:0> | ||
const config = { | ||
type: 'scatter', | ||
data: data, | ||
options: { | ||
plugins: { | ||
quadrants: { | ||
topLeft: Utils.CHART_COLORS.red, | ||
topRight: Utils.CHART_COLORS.blue, | ||
bottomRight: Utils.CHART_COLORS.green, | ||
bottomLeft: Utils.CHART_COLORS.yellow, | ||
} | ||
} | ||
}, | ||
plugins: [quadrants] | ||
}; | ||
// </block:config> | ||
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const actions = [ | ||
{ | ||
name: 'Randomize', | ||
handler(chart) { | ||
chart.data.datasets.forEach(dataset => { | ||
dataset.data = Utils.points(NUMBER_CFG); | ||
}); | ||
chart.update(); | ||
} | ||
}, | ||
]; | ||
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module.exports = { | ||
actions, | ||
config, | ||
}; |