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feat: allow closing a curve on polar line series #17720

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feat: allow closing a curve on polar line series #17720

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9b306ba
feat: allow closing a curve on polar line series
yassilah Oct 1, 2022
ba21d32
chore: remove pnpm lockfile
yassilah Oct 1, 2022
2bb3988
Merge branch 'apache:master' into feat-closed-line-series-polar
yassilah Nov 10, 2022
f21cadf
fix: change to
yassilah Nov 23, 2022
ef5f29e
test(line): add tests for loop option with various cases
yassilah Nov 23, 2022
8bf567d
Merge branch 'apache:master' into feat-closed-line-series-polar
yassilah Jan 22, 2023
0c1fb9e
Merge branch 'apache:master' into feat-closed-line-series-polar
yassilah Oct 10, 2023
0653a08
fix: clean code and skip process if no loop required
yassilah Oct 10, 2023
175d8cd
fix: remove unnecessary if statement
yassilah Oct 10, 2023
9cf4c8c
refactor(poly): use ECPolygon when Polyline is looped
yassilah Nov 16, 2023
60c8e93
refactor(poly): getLoopedPoints
yassilah Nov 16, 2023
8c2a932
refactor(poly): getSmoothableLoopedPoints
yassilah Nov 16, 2023
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4 changes: 4 additions & 0 deletions src/chart/line/LineSeries.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -120,6 +120,8 @@ export interface LineSeriesOption extends SeriesOption<LineStateOption<CallbackD
data?: (LineDataValue | LineDataItemOption)[]

triggerLineEvent?: boolean

closed?: boolean
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@Ovilia Ovilia Oct 18, 2022

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I think loop (inspired by gl.LINE_LOOP of WebGL) may be a better name than closed because it may not always be closed due to the existance of null data.

}

class LineSeriesModel extends SeriesModel<LineSeriesOption> {
Expand Down Expand Up @@ -152,6 +154,8 @@ class LineSeriesModel extends SeriesModel<LineSeriesOption> {

clip: true,

closed: false,

label: {
position: 'top'
},
Expand Down
16 changes: 10 additions & 6 deletions src/chart/line/LineView.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -657,6 +657,8 @@ class LineView extends ChartView {

const connectNulls = seriesModel.get('connectNulls');

const closed = isCoordSysPolar && seriesModel.get('closed');

const isIgnoreFunc = showSymbol && !isCoordSysPolar
&& getIsIgnoreFunc(seriesModel, data, coordSys as Cartesian2D);

Expand Down Expand Up @@ -725,10 +727,10 @@ class LineView extends ChartView {
}
}

polyline = this._newPolyline(points);
polyline = this._newPolyline(points, closed);
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@Ovilia Ovilia Oct 18, 2022

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It's a better idea to define const closed = isCoordSysPolar && seriesModel.get('closed'); here. It will make the code more readable and postpone the execution until necessary.

if (isAreaChart) {
polygon = this._newPolygon(
points, stackedOnPoints
points, stackedOnPoints, closed
);
}// If areaStyle is removed
else if (polygon) {
Expand All @@ -749,7 +751,7 @@ class LineView extends ChartView {
if (isAreaChart && !polygon) {
// If areaStyle is added
polygon = this._newPolygon(
points, stackedOnPoints
points, stackedOnPoints, closed
);
}
else if (polygon && !isAreaChart) {
Expand Down Expand Up @@ -1019,7 +1021,7 @@ class LineView extends ChartView {
polygon && setStatesFlag(polygon, toState);
}

_newPolyline(points: ArrayLike<number>) {
_newPolyline(points: ArrayLike<number>, closed: boolean) {
let polyline = this._polyline;
// Remove previous created polyline
if (polyline) {
Expand All @@ -1028,7 +1030,8 @@ class LineView extends ChartView {

polyline = new ECPolyline({
shape: {
points
points,
closed
},
segmentIgnoreThreshold: 2,
z2: 10
Expand All @@ -1041,7 +1044,7 @@ class LineView extends ChartView {
return polyline;
}

_newPolygon(points: ArrayLike<number>, stackedOnPoints: ArrayLike<number>) {
_newPolygon(points: ArrayLike<number>, stackedOnPoints: ArrayLike<number>, closed: boolean) {
let polygon = this._polygon;
// Remove previous created polygon
if (polygon) {
Expand All @@ -1051,6 +1054,7 @@ class LineView extends ChartView {
polygon = new ECPolygon({
shape: {
points,
closed,
stackedOnPoints: stackedOnPoints
},
segmentIgnoreThreshold: 2
Expand Down
28 changes: 23 additions & 5 deletions src/chart/line/poly.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -217,6 +217,7 @@ class ECPolylineShape {
smoothConstraint = true;
smoothMonotone: 'x' | 'y' | 'none';
connectNulls: boolean;
closed = false;
}

interface ECPolylineProps extends PathProps {
Expand Down Expand Up @@ -245,7 +246,15 @@ export class ECPolyline extends Path<ECPolylineProps> {
}

buildPath(ctx: PathProxy, shape: ECPolylineShape) {
const points = shape.points;
const points = shape.closed
? [
shape.points[shape.points.length - 2],
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@Ovilia Ovilia Oct 18, 2022

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What if shape.points.length is less than 2?

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@Ovilia Ovilia Oct 18, 2022

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We also need to consider the situation when some of the data is null and when connectNulls is set to either true or false. Please add test cases.

shape.points[shape.points.length - 1],
...shape.points as number[],
shape.points[0],
shape.points[1]
]
: shape.points;

let i = 0;
let len = points.length / 2;
Expand All @@ -267,7 +276,7 @@ export class ECPolyline extends Path<ECPolylineProps> {
}
while (i < len) {
i += drawSegment(
ctx, points, i, len, len,
ctx, points, shape.closed ? i - 1 : i, len, shape.closed ? len - 1 : len,
1,
shape.smooth,
shape.smoothMonotone, shape.connectNulls
Expand Down Expand Up @@ -369,7 +378,15 @@ export class ECPolygon extends Path {
}

buildPath(ctx: PathProxy, shape: ECPolygonShape) {
const points = shape.points;
const points = shape.closed
? [
shape.points[shape.points.length - 2],
shape.points[shape.points.length - 1],
...shape.points as number[],
shape.points[0],
shape.points[1]
]
: shape.points;
const stackedOnPoints = shape.stackedOnPoints;

let i = 0;
Expand All @@ -391,13 +408,14 @@ export class ECPolygon extends Path {
}
while (i < len) {
const k = drawSegment(
ctx, points, i, len, len,
ctx, points,
shape.closed ? i - 1 : i, len, shape.closed ? len - 1 : len,
1,
shape.smooth,
smoothMonotone, shape.connectNulls
);
drawSegment(
ctx, stackedOnPoints, i + k - 1, k, len,
ctx, stackedOnPoints, i + k - 1 - (shape.closed ? 1 : 0), k, shape.closed ? len - 1 : len,
-1,
shape.stackedOnSmooth,
smoothMonotone, shape.connectNulls
Expand Down