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<div id="scichart-root"></div>
body {
margin: 0;
}
#scichart-root {
width: 100%;
height: 100vh;
}
const {
DataPointSelectionModifier,
FastLineRenderableSeries,
SplineLineRenderableSeries,
IPointMarker,
IPointMetadata,
IPointSeries,
IXyyPointSeries,
LineSeriesDrawingProvider,
MouseWheelZoomModifier,
NumberRange,
NumericAxis,
PointMarkerDrawingProvider,
RenderPassData,
SciChartJsNavyTheme,
SciChartSurface,
EllipsePointMarker,
XyDataSeries,
XyScatterRenderableSeries,
XyyBaseRenderDataTransform,
ZoomExtentsModifier,
ZoomPanModifier,
} = SciChart;
class DashedOrSolidRenderDataTransform extends XyyBaseRenderDataTransform {
protected runTransformInternal(renderPassData: RenderPassData): IPointSeries {
// Guard in case the incoming data is empty
// If you want to do nothing and draw the original data, you don't need to copy it, you can just return renderPassData.pointSeries
if (!renderPassData.pointSeries) {
return this.pointSeries;
}
// It is important to reuse this.pointSeries. Do NOT create a new pointSeries on each transform
const {
xValues: oldX,
yValues: oldY,
indexes: oldI,
resampled,
} = renderPassData.pointSeries;
const { xValues, yValues, y1Values, indexes } = this.pointSeries;
// Clear the target vectors
xValues.clear();
yValues.clear();
y1Values.clear();
indexes.clear();
// indexRange tells the drawing to only use a subset of the data. If data has been resampled, then always use all of it
const iStart = resampled ? 0 : renderPassData.indexRange.min;
const iEnd = resampled ? oldX.size() - 1 : renderPassData.indexRange?.max;
const ds = this.parentSeries.dataSeries as XyDataSeries;
let prevDash = false;
for (let i = iStart; i <= iEnd; i++) {
const index = resampled ? oldI.get(i) : i;
const md = ds.getMetadataAt(index);
xValues.push_back(oldX.get(i));
indexes.push_back(oldI.get(i));
// Add normal point if the current or previous is not dashed
yValues.push_back((!md.dash || !prevDash) ? oldY.get(i) : NaN);
// Add dashed point if the current or previous is dashed
y1Values.push_back(prevDash || md.dash ? oldY.get(i) : NaN);
if (md.dash && !prevDash) {
// Add a break in the normal if the current is dashed but the previous was not
xValues.push_back(oldX.get(i));
yValues.push_back(NaN);
y1Values.push_back(oldY.get(i))
} else if (!md.dash && prevDash) {
// Add a break in the dashed if the current is not dashed but the previous was
xValues.push_back(oldX.get(i));
yValues.push_back(oldY.get(i));
y1Values.push_back(NaN);
}
prevDash = md.dash;
}
// Return the transformed point series
return this.pointSeries;
}
}
async function simpleSplit(divElementId: string) {
// Create a SciChartSurface with X,Y Axis
const { sciChartSurface, wasmContext } = await SciChartSurface.create(divElementId, {
theme: new SciChartJsNavyTheme() }
);
sciChartSurface.xAxes.add(new NumericAxis(wasmContext));
sciChartSurface.yAxes.add(new NumericAxis(wasmContext, { growBy: new NumberRange(0.1, 0.1)}));
// Create the data. X,Y values are numeric
// dashValues are mapped to metadata (javascript objects)
const xValues = [0,1,2,3,4,5,6];
const yValues = [1,8,3,4,2,3,4];
const metadata = [0,0,0,0,1,1,1].map(num => ({ dash: num }));
const dataSeries = new XyDataSeries(wasmContext, {
xValues,
yValues,
metadata
});
const lineSeries = new FastLineRenderableSeries(wasmContext, {
dataSeries,
strokeThickness: 3,
stroke: "SteelBlue",
pointMarker: new EllipsePointMarker(wasmContext, { width: 7, height: 7, strokeThickness:0, fill: "SteelBlue"})
});
// Add the new drawingProvider to the series
const dashedDrawingProvider = new LineSeriesDrawingProvider(wasmContext, lineSeries, (ps) => ps.y1Values);
lineSeries.drawingProviders.push(dashedDrawingProvider);
dashedDrawingProvider.getProperties = (parentSeries) => {
const { stroke, strokeThickness, opacity, isDigitalLine, lineType, drawNaNAs } = parentSeries;
return {
stroke,
strokeThickness,
strokeDashArray: [3, 4],
isDigitalLine,
lineType,
drawNaNAs,
containsNaN: true,
};
};
// Create the transform and add it to the series. Pass only the lineDrawingProviders
lineSeries.renderDataTransform = new DashedOrSolidRenderDataTransform(lineSeries, wasmContext, [lineSeries.drawingProviders[0], dashedDrawingProvider]);
sciChartSurface.renderableSeries.add(lineSeries);
}
simpleSplit("scichart-root");
Also see: Tab Triggers