我想在折线图的 x 轴上显示中断并以固定宽度显示它们,如下图所示:
发现这篇描述功能的好文章:
https://www.arction.com/news/using-scale-breaks-data-visualization/
如果我理解正确,SDK 中有可能使用 scaleAreas 显示这些内容,甚至可以使用 ClipAreas 更好地显示这些内容。但是我在 LightningChart JS 框架中找不到这种可能性。
作为起点,我能够生成带有NaN
值的数据中断并添加了一个文本框。
所以我的问题是:
1.如何在xaxis中添加中断并适应预定义的宽度
2. 如何将文本框旋转 90 度?
帮助将不胜感激。
提前致谢。:o)
// Extract required parts from LightningChartJS.
const {
lightningChart,
AxisTickStrategies,
DataPatterns,
emptyFill,
ColorHEX,
emptyLine,
UIElementBuilders,
UIBackgrounds,
UIOrigins,
UIDraggingModes,
SolidLine,
SolidFill
} = lcjs
// Create a XY Chart.
const dateOrigin = new Date(2020, 0, 1)
const chart = lightningChart().ChartXY({
defaultAxisXTickStrategy: AxisTickStrategies.DateTime(
dateOrigin
)
})
.setTitle('Demo')
chart.setPadding({ right: '1' })
// Add a progressive line series.
// Using the DataPatterns object to select the horizontalProgressive pattern for the line series.
const lineSeries = chart.addLineSeries({ dataPattern: DataPatterns.horizontalProgressive })
.setName('Demo')
// Generate some points using for each month
const dataFrequency = 10;
// Setup view nicely.
chart.getDefaultAxisY()
.setScrollStrategy(undefined)
.setInterval(-20, 120)
.setTitle('Demo y')
// Data for the plotting
const data = [];
for (let i = 0; i < 1500; i++) {
let index = i;
if (i === 500) {
index = NaN;
}
if (i > 500) {
index = i + 1000;
}
data.push({
x: index,
y: Math.floor(Math.random() * 100)
});
}
chart.addUIElement(
UIElementBuilders.TextBox
.setBackground(UIBackgrounds.Rectangle),
chart.uiScale
)
.setText('Break')
.setPosition({ x: 45, y: 50 })
.setOrigin(UIOrigins.Center)
.setDraggingMode(UIDraggingModes.notDraggable)
.setFont((font) => font
.setSize(40)
)
.setBackground(style => style
.setFillStyle(new SolidFill({ color: ColorHEX('#f00') }))
)
.setTextFillStyle((style) => style
.setColor(ColorHEX('#0f0'))
)
// Adding points to the series
lineSeries.add(data.map((point) => ({ x: point.x * dataFrequency, y: point.y })))
<script src="https://unpkg.com/@arction/lcjs@1.3.1/dist/lcjs.iife.js"></script>