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* Copyright (c) Siemens 2016 - 2026
* SPDX-License-Identifier: MIT
*/
import {
AfterViewInit,
ChangeDetectorRef,
Component,
ElementRef,
inject,
input,
model,
NgZone,
OnChanges,
OnDestroy,
OnInit,
output,
signal,
SimpleChanges,
viewChild,
viewChildren
} from '@angular/core';
import {
CustomLegend,
CustomLegendItem,
CustomLegendProps,
SiCustomLegendComponent
} from '@siemens/charts-ng/custom-legend';
import { SiChartLoadingSpinnerComponent } from '@siemens/charts-ng/loading-spinner';
import { echarts } from './echarts.custom';
import {
DataZoomComponentOption,
EChartOption,
EChartSeries,
GridComponentOption
} from './echarts.model';
import {
AxisPointerEvent,
CustomLegendMultiLineInfo,
DataZoomEvent,
DataZoomRange,
FilterMode,
GridRectCoordinate,
LegendItem,
LineColor,
SelectedLegendItem,
SeriesSelectionState,
SeriesUpdate
} from './si-chart.interfaces';
import { themeSupport } from './theme-support';
@Component({
selector: 'si-chart-base',
imports: [SiCustomLegendComponent, SiChartLoadingSpinnerComponent],
templateUrl: './si-chart-base.component.html',
styleUrl: './si-chart-base.component.scss',
host: {
'(window:theme-switch)': 'themeSwitch()'
}
})
export class SiChartBaseComponent implements AfterViewInit, OnChanges, OnInit, OnDestroy {
/**
* reference to the wrapper container. Used for setting scroll position, etc.
*
* @defaultValue
* ```
* viewChild.required<ElementRef>('chartContainerWrapper')
* ```
*/
readonly chartContainerWrapper = viewChild.required<ElementRef>('chartContainerWrapper');
protected readonly chartContainer = viewChild<ElementRef>('chart');
protected readonly externalZoomSliderContainer = viewChild<ElementRef>('externalZoomSlider');
protected readonly siCustomLegend = viewChildren('siCustomLegend', {
read: SiCustomLegendComponent
});
/**
* See [ECharts 5.x Documentation]{@link https://echarts.apache.org/en/option.html}
* for all available options.
*/
readonly options = input<EChartOption>();
/** Used to override specific properties set in `options`. */
readonly additionalOptions = input<EChartOption>();
/** The title of the chart. */
readonly title = input<string>();
/** The subtitle of the chart. */
readonly subTitle = input<string>();
/**
* Show Echarts legend
*
* @defaultValue true
*/
readonly showLegend = model(true);
/**
* Enable to show a custom legend.
* The custom legend offers additional features such as, scroll bar to avoid legend and chart overlapping,
* Left and right alignment of legends based on y-axis, etc and many more.
* @defaultValue false
*/
readonly showCustomLegend = input(false);
/**
* the renderer to use: canvas or svg
*
* @defaultValue 'canvas'
*/
readonly renderer = input<'canvas' | 'svg'>('canvas');
/**
* Enables the zoom slider below the chart.
*
* @defaultValue false
*/
readonly zoomSlider = input(false);
/**
* Shows data shadow in dataZoom slider, use together with `zoomSlider`.
*
* @defaultValue true
*/
readonly zoomSliderShadow = input(true);
/**
* realtime update mode for zoom slider
*
* @defaultValue true
*/
readonly zoomSliderRealtime = input(true);
/**
* enable brush mode for zoom slider
*
* @defaultValue true
*/
readonly zoomSliderBrush = input(true);
/**
* Enables zooming inside the chart with the mouse wheel/touch.
*
* Whether zooming inside the chart is possible with mouse.
*
* @defaultValue false
*/
readonly zoomInside = input(false);
/**
* Maximum number of series data points shown in the chart.
*
* @defaultValue 1000
*/
readonly maxEntries = input(1000);
/**
* No auto dataZoom update) by default. Use together with `autoZoomSeriesIndex`.
*
* @defaultValue -1
*/
readonly visibleEntries = model(-1);
/**
* No auto dataZoom update) by default. Use together with `autoZoomSeriesIndex`.
*
* @defaultValue -1
*/
readonly visibleRange = model(-1);
/**
* No auto dataZoom update) by default. Use together with `visibleEntries`.
*
* @defaultValue -1
*/
readonly autoZoomSeriesIndex = input(-1);
/** The desired theme to load. */
readonly theme = input<any>();
/** Used to override specific options of loaded `theme`. */
readonly themeCustomization = input<any>();
/**
* The name of the color palette (if any) of the loaded `theme`.
*
* @defaultValue undefined
*/
readonly palette = input<string | undefined>();
/**
* Used to display `axisPointer` line either by click or mouse-move.
*
* @defaultValue false
*/
readonly axisPointer = input<(boolean | string) | undefined>(false);
/**
* Apply a specific zoom range (see {@link https://echarts.apache.org/en/option.html#dataZoom-inside}).
*/
readonly dataZoomRange = input<DataZoomRange>();
/**
* The lower limit of the data zoom slider (see {@link https://echarts.apache.org/en/option.html#dataZoom-slider.minValueSpan}).
*/
readonly dataZoomMinValueSpan = input<number>();
/**
* The upper limit of the data zoom slider (see {@link https://echarts.apache.org/en/option.html#dataZoom-slider.maxValueSpan}).
*/
readonly dataZoomMaxValueSpan = input<number>();
/**
* The data zoom filter mode. (see {@link https://echarts.apache.org/en/option.html#dataZoom-inside.filterMode})
*
* The value 'filter' will cause the lines to be disconnected to the outside of the chart.
*
* @defaultValue 'none'
*/
readonly dataZoomFilterMode = input<FilterMode>('none');
/**
* Enable custom legend click actions exposed by the `selectionChanged` event.
*/
readonly customLegendAction = input<boolean>();
/**
* Specify selected legend item.
*
* @defaultValue
* ```
* { legendItemName: '' }
* ```
*/
readonly selectedItem = input<SelectedLegendItem>({ legendItemName: '' });
/**
* The height of the ECharts container as decimal.
*/
readonly eChartContainerHeight = input<string | null>();
/**
* Flag to use external zoom slider
*
* @defaultValue false
*/
readonly externalZoomSlider = input(false);
/** External XAxis Formatter from consumer */
readonly externalXAxisFormatter = input<(value: any, visibleRange: number) => string>();
/**
* If true, add consumer-provided time range bar. Use together with `zoomSlider`.
* @deprecated The input will be removed in future versions as the time range bar slot is deprecated.
*
* @defaultValue false
*/
readonly showTimeRangeBar = input(false);
/** Event emitted when data zoom changes. */
readonly dataZoom = output<DataZoomEvent>();
/** Event emitted when axis pointer moves. */
readonly pointer = output<AxisPointerEvent>();
/** Event emitted when selection changes e.g. clicking on a legend item. */
readonly selectionChanged = output<any>();
/** Event emitted when a chart series is clicked. */
readonly chartSeriesClick = output<LegendItem>();
/** Event emitted when chart grid is resized. */
readonly chartGridResized = output<GridRectCoordinate>();
/** Event emitted when custom legend multi-line info changes. */
readonly customLegendMultiLineInfoEvent = output<CustomLegendMultiLineInfo[]>();
/** Emitted when data zoom changes, indicating the time range in milliseconds, 0 for full range */
readonly timeRangeChange = output<number>();
/** Allow to override options specific for a chart type. */
protected actualOptions: EChartOption = {};
protected customLegend: CustomLegend[] = [
{
customLegends: [
{ list: [], unit: '' },
{ list: [], unit: '' }
],
legendAxis: 'both'
}
];
/** @internal */
chart!: echarts.ECharts;
private extZoomSliderChart!: echarts.ECharts;
private echartElement!: HTMLElement;
private eChartExtSliderElement!: HTMLElement;
protected readonly inProgress = signal(false);
protected readonly backgroundColor = signal('');
protected readonly textColor = signal('');
protected readonly titleColor = signal('');
protected readonly subTitleColor = signal('');
private selectedSeriesColors: LineColor = {};
private unselectedSeriesColors: LineColor = {};
private seriesSelectionState: SeriesSelectionState = {};
protected readonly containerHeight = signal<number | null>(null);
protected activeTheme: any;
protected autoZoomUpdate = true;
private prevAxisPointer: any = {};
private lastValidDataZoom: any = {};
private presetDataZoomRange?: DataZoomRange;
private dataZoomSetupDone = false;
private requestedDataZoom?: DataZoomRange;
private measureCanvas?: CanvasRenderingContext2D;
private readonly cdRef = inject(ChangeDetectorRef);
private readonly ngZone = inject(NgZone);
protected curWidth = 0;
protected curHeight = 0;
protected readonly timeBarBottom = signal(50);
protected readonly timeBarLeft = signal(32);
protected readonly timeBarRight = signal(32);
protected readonly timeBarHeight = signal(32);
private gridCoordinates: GridRectCoordinate = {
x: 0,
y: 0,
width: 0,
height: 0,
containerWidth: 0,
containerHeight: 0
};
private customLegendsMultiLineInfo: CustomLegendMultiLineInfo[] = [];
protected extZoomSliderOptions: EChartOption = {
animation: false,
dataZoom: [
{ type: 'slider', showDataShadow: false },
{ type: 'inside', showDataShadow: false }
],
grid: [{ left: 32, right: 32, top: 0, height: 0, containLabel: false }],
xAxis: [{ type: 'time', axisLine: { onZero: true }, zlevel: 1 }],
yAxis: [{ type: 'value', boundaryGap: [0, '100%'], splitLine: { show: false }, show: false }],
series: [{ type: 'line', showSymbol: false, lineStyle: { opacity: 0 }, data: [] }]
};
private readonly echartMouseDown = (): void => this.handleChartMouseDown();
private readonly echartMouseUp = (event: MouseEvent): void => this.handleChartMouseUp(event);
private readonly echartExtSliderMouseDown = (): void => this.handleExtChartMouseDown();
private readonly echartExtSliderMouseUp = (event: MouseEvent): void =>
this.handleExtChartMouseUp(event);
protected readonly shapePaths: Record<string, string> = {
circle: 'M6 0A6 6 0 1 1 6 12A6 6 0 1 1 6 0Z',
rect: 'M0 0H12V12H0Z',
roundRect: 'M2 0H10A2 2 0 0 1 12 2V10A2 2 0 0 1 10 12H2A2 2 0 0 1 0 10V2A2 2 0 0 1 2 0Z',
triangle: 'M6 0L12 12H0L6 0Z',
diamond: 'M6 0L12 6L6 12L0 6L6 0Z',
pin: 'M6.00049 0C8.48577 0 10.5005 2.01472 10.5005 4.5C10.5005 5.51817 10.0175 6.461 9.46826 7.31836C8.42358 8.94924 7.16317 10.4497 6.00049 12C4.83781 10.4497 3.57642 8.94924 2.53174 7.31836C1.98255 6.461 1.49951 5.51817 1.49951 4.5C1.49951 2.01472 3.51521 0 6.00049 0Z'
};
/**
* Allow consuming applications to re-draw chart on window resizes.
*/
resize(): void {
Iif (!this.chart) {
return;
}
const rect = this.chartContainer()?.nativeElement.getBoundingClientRect();
const width = Math.floor(rect.width);
const height = Math.floor(rect.height);
Iif (width && height && (width !== this.curWidth || height !== this.curHeight)) {
this.curWidth = width;
this.curHeight = height;
this.ngZone.runOutsideAngular(() => {
this.chart.resize({ width, height: this.containerHeight() ?? height });
if (this.externalZoomSlider()) {
this.extZoomSliderChart.resize();
}
setTimeout(() => this.checkGridSizeChange());
});
this.afterChartResize();
}
this.updateCustomLegendMultiLineInfo();
}
ngOnChanges(changes: SimpleChanges<unknown>): void {
if (changes.options?.currentValue) {
this.actualOptions = this.options()!;
}
if (!this.chart) {
return;
}
Iif (changes.eChartContainerHeight) {
this.setContainerHeight();
}
const selectedLegendItem = changes.selectedItem;
Iif (
selectedLegendItem &&
!selectedLegendItem.isFirstChange() &&
selectedLegendItem.currentValue
) {
const event = {
name: selectedLegendItem.currentValue.legendItemName,
type: 'legendToggleSelect'
};
this.dispatchEChartAction(event);
}
Iif (
this.customLegendAction() &&
changes.options &&
!changes.options.isFirstChange() &&
!changes.options.currentValue.color.length
) {
this.actualOptions.color = changes.options.previousValue.color;
}
Iif (changes.theme || changes.renderer) {
// need to completely redo the chart for the theme change to take effect
return this.resetChart();
}
let updates = 0;
let applyAll = false;
let skipMerge = false;
if (
changes.forceAll ||
changes.yAxis ||
changes.xAxis ||
changes.options ||
changes.series ||
changes.value
) {
// this is to clean the legend item list
Iif (this.showCustomLegend() && this.customLegend && this.customLegend.length > 0) {
this.customLegend.forEach(cl => {
cl.customLegends = [
{ list: [], unit: '' },
{ list: [], unit: '' }
];
});
}
this.applyOptions();
applyAll = true;
skipMerge =
changes.series?.previousValue &&
changes.series.currentValue &&
changes.series.currentValue.length < changes.series.previousValue.length;
updates++;
}
if (!applyAll && (changes.title || changes.subTitle)) {
// already called when `applyOptions()` has been called
this.applyTitles();
updates++;
}
if (
applyAll ||
changes.forceAll ||
changes.zoomSlider ||
changes.zoomSliderShadow ||
changes.zoomSliderRealtime ||
changes.zoomSliderBrush ||
changes.zoomInside ||
changes.axisPointer ||
changes.autoZoomSeriesIndex ||
changes.visibleEntries ||
changes.visibleRange
) {
this.applyDataZoom();
updates++;
}
if (applyAll || changes.forceAll || changes.palette || changes.additionalOptions) {
this.applyAdditionalOptions();
updates++;
}
if (applyAll) {
this.applyStyles();
setTimeout(() => this.updateCustomLegendMultiLineInfo());
}
let skipDz = false;
Eif (updates) {
Iif (changes.dataZoomRange) {
this.setDataZoomRange(true);
skipDz = true;
}
const dz = this.actualOptions.dataZoom!;
let currentDataZoom: DataZoomComponentOption | undefined;
Iif (skipMerge && this.hasDataZoom() && this.hasData() && !skipDz) {
// forced updated is required when adding/removing series, see:
// https://github.com/apache/incubator-echarts/issues/6202
// in order not to mess up current datazoom, save the current value and add it to options
this.saveCurrentDataZoom();
if (this.lastValidDataZoom) {
currentDataZoom = dz[0];
const newDataZoom: DataZoomComponentOption = {};
echarts.util.merge(newDataZoom, dz[0], true);
echarts.util.merge(newDataZoom, this.lastValidDataZoom, true);
dz[0] = newDataZoom;
}
}
this.updateEChart(skipMerge);
Iif (currentDataZoom) {
dz[0] = currentDataZoom;
this.updateEChart(false, { dataZoom: this.actualOptions.dataZoom });
}
this.applyColorsToCustomLegends();
}
Iif (!skipDz && changes.dataZoomRange) {
// this is done after a possible setOptions call to ensure echarts has all the desired states
this.setDataZoomRange();
}
this.cdRef.markForCheck();
}
ngOnInit(): void {
const canvas = document.createElement('canvas') as HTMLCanvasElement;
this.measureCanvas = canvas.getContext('2d') as CanvasRenderingContext2D;
this.measureCanvas.font = '12px "SiemensSans Pro"';
const externalXAxisFormatter = this.externalXAxisFormatter();
Iif (this.externalZoomSlider() && externalXAxisFormatter) {
const consumerFormatter = externalXAxisFormatter;
this.extZoomSliderOptions.xAxis[0].axisLabel = {
formatter: (value: any) => consumerFormatter(value, this.visibleRange())
};
}
this.applyTheme();
// this is to clean the legend item list
Iif (this.showCustomLegend() && this.customLegend && this.customLegend.length > 0) {
this.customLegend.forEach(cl => {
cl.customLegends = [
{ list: [], unit: '' },
{ list: [], unit: '' }
];
});
}
this.applyOptions();
this.applyAdditionalOptions();
this.applyDataZoom();
this.applyStyles();
Iif (this.customLegendAction()) {
this.fetchSeriesColors();
}
}
ngAfterViewInit(skipZoom?: boolean): void {
this.ngZone.runOutsideAngular(() => {
const chartContainerEl = this.chartContainer()!.nativeElement;
// set current dimension to avoid initial resize() call on chart
const rect = chartContainerEl.getBoundingClientRect();
this.curWidth = Math.floor(rect.width);
this.curHeight = Math.floor(rect.height);
const opts = { renderer: this.renderer() };
this.chart = echarts.init(chartContainerEl, this.activeTheme, opts);
this.echartElement = chartContainerEl as HTMLElement;
this.getEChartInner()?.addEventListener('mousedown', this.echartMouseDown);
this.chart.setOption(this.actualOptions);
setTimeout(() => this.checkGridSizeChange());
Iif (this.externalZoomSlider()) {
this.extZoomSliderChart = echarts.init(
this.externalZoomSliderContainer()!.nativeElement,
this.activeTheme,
opts
);
this.eChartExtSliderElement = this.externalZoomSliderContainer()!
.nativeElement as HTMLElement;
this.getEChartExternalSliderInner()?.addEventListener(
'mousedown',
this.echartExtSliderMouseDown
);
this.extZoomSliderChart.setOption(this.extZoomSliderOptions);
this.extZoomSliderChart.on('datazoom', (event: any) => this.handleExtDataZoom(event));
}
this.afterChartInit(skipZoom);
});
setTimeout(() => {
this.resize();
this.applyColorsToCustomLegends();
});
}
private calculateTextWidth(text: string): number {
if (!this.measureCanvas) {
return 150;
}
return Math.ceil(this.measureCanvas.measureText(text).width);
}
private disposeChart(): void {
if (this.chart && !this.chart.isDisposed()) {
this.chart.dispose();
}
Iif (this.extZoomSliderChart && !this.extZoomSliderChart.isDisposed()) {
this.extZoomSliderChart.dispose();
}
}
ngOnDestroy(): void {
this.disposeChart();
}
/**
* Switch theme using echarts api, which does not need reloading the whole chart.
*/
themeSwitch(): void {
if (!this.chart) {
return;
}
this.applyTheme();
this.chart.setTheme(this.activeTheme);
// Since color palette is set thorugh options, it needs to be set again.
this.themeChanged();
this.applyPalette();
this.applyStyles();
this.applyTitles();
setTimeout(() => {
this.applyColorsToCustomLegends();
});
this.chart.setOption(this.actualOptions);
if (this.externalZoomSlider()) {
this.extZoomSliderChart.setTheme(this.activeTheme);
this.extZoomSliderChart.setOption(this.extZoomSliderOptions);
}
this.cdRef.markForCheck();
}
/**
* Re-render the whole chart.
* @deprecated The method is deprecated and should not be used directly by the consumer.
*/
resetChart(): void {
this.applyTheme();
if (!this.actualOptions) {
// this can happen if the SiThemeService fires the theme switch when the chart is not
// yet completely initialized
return;
}
this.disposeChart();
this.applyPalette();
const addOpts = this.additionalOptions();
if (addOpts?.palette) {
echarts.util.merge(this.actualOptions.palette, addOpts.palette, true);
}
this.themeChanged();
this.applyStyles();
this.applyTitles();
this.ngAfterViewInit(true); // eslint-disable-line @angular-eslint/no-lifecycle-call
this.cdRef.markForCheck();
}
protected handleLegendClick(legend: CustomLegendItem): void {
this.doToggleSeriesVisibility(legend.name, legend.selected, legend);
this.cdRef.markForCheck();
}
protected handleLegendHover(legend: CustomLegendItem, start: boolean): void {
this.dispatchEChartAction({
type: start ? 'highlight' : 'downplay',
[legend.alternativeNaming ? 'name' : 'seriesName']: legend.name
});
}
/**
* Toggle visibility of a series.
*/
toggleSeriesVisibility(name: string, visible: boolean): void {
const legendItem = this.findCustomLegendItem(name);
this.doToggleSeriesVisibility(name, visible, legendItem);
this.cdRef.markForCheck();
}
private doToggleSeriesVisibility(
name: string,
visible: boolean,
legendItem?: CustomLegendItem
): void {
if (legendItem) {
legendItem.selected = visible;
}
this.dispatchEChartAction({ type: visible ? 'legendSelect' : 'legendUnSelect', name });
if (this.externalZoomSlider()) {
this.ngZone.runOutsideAngular(() => {
this.extZoomSliderChart.dispatchAction({
type: visible ? 'legendSelect' : 'legendUnSelect',
name
});
});
}
const opt = this.getOptionNoClone();
if (Array.isArray(opt.legend)) {
const selection: any = {};
opt.legend.forEach((l: any) => Object.assign(selection, l.selected));
this.handleSelectionChanged({ selected: selection });
}
}
private findCustomLegendItem(name: string): CustomLegendItem | undefined {
if (this.showCustomLegend()) {
for (const cl of this.customLegend) {
for (const l of cl.customLegends) {
for (const item of l.list) {
if (item.name === name) {
return item;
}
}
}
}
}
return undefined;
}
protected getValidXAxis(): Set<number> | undefined {
return undefined;
}
protected setZoomMode(): void {}
private applyTheme(): void {
// Set default theme if no theme provided
const theme = this.theme();
Iif (theme?.style) {
this.activeTheme = theme.style();
E} else if (themeSupport._defaultTheme?.style) {
this.activeTheme = themeSupport._defaultTheme.style();
}
const themeCustomization = this.themeCustomization();
Iif (themeCustomization) {
const custom = echarts.util.merge({}, themeCustomization);
this.activeTheme = echarts.util.merge(custom, this.activeTheme);
}
}
protected themeChanged(): void {}
protected applyOptions(): void {}
protected applyCustomLegendPosition(): void {
if (this.showLegend() && this.showCustomLegend()) {
this.customLegend.forEach(cl => {
if (cl.customLegends?.[0].list && cl.customLegends?.[1].list) {
const leftLegend = cl.customLegends[0];
const rightLegend = cl.customLegends[1];
// if we have left and right axis
if (leftLegend.list.length > 0 && rightLegend.list.length > 0) {
cl.legendAxis = 'both';
} else if (leftLegend.list.length > 0 && rightLegend.list.length === 0) {
// if we have only left axis data
cl.legendAxis = 'left';
} else if (leftLegend.list.length === 0 && rightLegend.list.length > 0) {
// if we have only right axis data
cl.legendAxis = 'right';
} else {
cl.legendAxis = 'both';
}
} else {
cl.legendAxis = 'both';
}
});
this.cdRef.markForCheck();
}
}
private applyAdditionalOptions(): void {
// need to merge palette before the additionalOptions so that overrides work as expected
this.applyPalette();
Iif (this.additionalOptions()) {
echarts.util.merge(this.actualOptions, this.additionalOptions(), true);
}
}
private applyPalette(): void {
const paletteValue = this.palette() ?? 'default';
Eif (paletteValue) {
const palette = this.getThemeCustomValue(['colorPalettes', paletteValue], null);
Eif (palette) {
this.actualOptions.color = palette;
Iif (this.customLegendAction()) {
this.fetchSeriesColors(palette);
}
}
}
}
protected applyDataZoom(): void {
if (!this.actualOptions.grid) {
return;
}
this.actualOptions.dataZoom ??= [];
const sliderOptions: any = {};
const dataZoomMinValueSpan = this.dataZoomMinValueSpan();
Iif (dataZoomMinValueSpan) {
sliderOptions.minValueSpan = dataZoomMinValueSpan;
}
const dataZoomMaxValueSpan = this.dataZoomMaxValueSpan();
Iif (dataZoomMaxValueSpan) {
sliderOptions.maxValueSpan = dataZoomMaxValueSpan;
}
sliderOptions.realtime = this.zoomSliderRealtime();
sliderOptions.brushSelect = this.zoomSliderBrush();
sliderOptions.showDataShadow = this.zoomSliderShadow();
sliderOptions.filterMode = this.dataZoomFilterMode();
sliderOptions.showDetail = false;
// keep external zoom slider in sync, always at index 0
Object.assign(this.extZoomSliderOptions.dataZoom![0], sliderOptions);
const dz = this.actualOptions.dataZoom!;
const sliderIdx = dz.findIndex(z => z.type === 'slider');
const insideIdx = dz.findIndex(z => z.type === 'inside');
const zoomSlider = this.zoomSlider();
Iif (zoomSlider && sliderIdx === -1) {
// for the non-external, merge with other options
const customOptions = this.getThemeCustomValue(['dataZoom', 'options'], {});
const dzSliderOptions: any = Object.assign({ type: 'slider' }, customOptions, sliderOptions);
Object.assign(this.extZoomSliderOptions.dataZoom![0], customOptions);
const externalZoomSlider = this.externalZoomSlider();
if (externalZoomSlider) {
dzSliderOptions.show = false;
}
dz.push(dzSliderOptions);
const gridOptions = externalZoomSlider
? this.getThemeCustomValue(['externalZoomSlider', 'grid'], {})
: this.getThemeCustomValue(['dataZoom', 'grid'], {});
if (this.showTimeRangeBar()) {
const timeBarOptions = this.getThemeCustomValue(['timeRangeBar'], {});
if (customOptions.height && customOptions.bottom) {
this.timeBarBottom.set(customOptions.height + customOptions.bottom);
}
this.timeBarHeight.set(timeBarOptions?.height ?? 32);
if (!externalZoomSlider) {
gridOptions.bottom = (gridOptions?.bottom ?? 0) + this.timeBarHeight();
}
}
echarts.util.merge(this.actualOptions.grid, gridOptions, true);
I} else if (zoomSlider && sliderIdx >= 0) {
// update existing
const dzSliderOptions = dz[sliderIdx];
Object.assign(dzSliderOptions, sliderOptions);
I} else if (!zoomSlider && sliderIdx >= 0) {
dz.splice(sliderIdx, 1);
}
const zoomInside = this.zoomInside();
Iif (zoomInside && insideIdx === -1) {
dz.push({ type: 'inside', filterMode: this.dataZoomFilterMode() });
I} else if (!zoomInside && insideIdx >= 0) {
dz.splice(insideIdx, 1);
}
if (this.actualOptions.xAxis) {
this.handleAxisPointer(this.actualOptions);
}
this.cdRef.markForCheck();
}
private handleAxisPointer(options: EChartOption): void {
const axisPointer = this.axisPointer();
Eif (axisPointer !== undefined) {
options.axisPointer ??= {};
}
Iif (axisPointer === true) {
options.axisPointer.triggerOn = 'click';
} else if (axisPointer === false) {
options.axisPointer.triggerOn = 'mousemove|click';
E} else if (typeof axisPointer === 'string') {
options.axisPointer.triggerOn = axisPointer;
}
Iif (Array.isArray(options.xAxis)) {
const xAxisArray: any[] = options.xAxis;
xAxisArray.forEach(axis => this.handleAxisPointerSingleAxis(axis));
} else {
this.handleAxisPointerSingleAxis(options.xAxis);
}
}
private handleAxisPointerSingleAxis(xAxis: any): void {
Iif (this.axisPointer()) {
echarts.util.merge(xAxis, { axisPointer: { handle: { show: true } } }, true);
} else {
echarts.util.merge(xAxis, { axisPointer: { handle: { show: false } } }, true);
}
}
protected hasDataZoom(): boolean {
return !!this.actualOptions.dataZoom?.length;
}
protected getThemeValue(props: string[], defaultValue: any, ns?: string): any {
Iif (!this.activeTheme) {
return defaultValue;
}
let currentValue = this.activeTheme;
Eif (ns) {
currentValue = currentValue[ns];
}
for (let i = 0; currentValue && i < props.length; i++) {
currentValue = currentValue[props[i]];
}
return currentValue ?? defaultValue;
}
protected getThemeCustomValue(props: string[], defaultValue: any): any {
return this.getThemeValue(props, defaultValue, 'simpl');
}
protected applyTitles(): void {
const title = this.title();
const subTitle = this.subTitle();
const options = this.actualOptions;
Iif (this.showLegend() && this.showCustomLegend()) {
if (options.title) {
options.title.show = false;
}
options.legend?.forEach(legend => {
legend.show = false;
legend.height = 0;
});
if (options.grid) {
const gridOptions = this.getThemeCustomValue(['customLegend', 'grid'], {});
echarts.util.merge(options.grid, gridOptions, true);
}
this.titleColor.set(this.getThemeValue(['title', 'textStyle', 'color'], null));
this.subTitleColor.set(
this.getThemeValue(['title', 'subtextStyle', 'color'], this.titleColor)
);
this.textColor.set(this.getThemeValue(['legend', 'textStyle', 'color'], null));
this.backgroundColor.set(this.getThemeValue(['backgroundColor'], null));
} else if (title || subTitle) {
options.title = {
text: title,
subtext: subTitle
};
if (subTitle) {
this.modifyTopAlignment('subTitle');
}
E} else if (!title && !subTitle && !options.title) {
this.modifyTopAlignment('noTitle');
}
}
private modifyTopAlignment(key: string): void {
const options = this.actualOptions;
if (options.grid) {
const gridOptions = this.getThemeCustomValue([key, 'grid'], {});
echarts.util.merge(options.grid, gridOptions, true);
}
const legendOptions = this.getThemeCustomValue([key, 'legend'], {});
options.legend?.forEach(legend => echarts.util.merge(legend, legendOptions, true));
}
protected afterChartInit(skipZoom?: boolean): void {
this.chart.on('datazoom', (event: any) => this.handleDataZoom(event, 'echart'));
if (!this.customLegendAction()) {
// default generic si-chart behavior
this.chart.on('legendselectchanged', (event: any) => this.handleSelectionChanged(event));
this.chart.on('click', (event: any) => this.handleClickOnChart(event, false));
} else E{
// custom chart behaviour
this.chart.on('legendselectchanged', (event: any) =>
this.handleSelectionChangedCustom(event)
);
this.chart.on('click', (event: any) => this.handleClickOnChart(event, true));
}
this.chart.on('updateaxispointer', (event: any) => this.handleUpdateAxisPointer(event));
Eif (!skipZoom) {
this.setDataZoomRange();
}
this.cdRef.markForCheck();
}
protected afterChartResize(): void {}
private getEChartInner(): Element | null {
return this.echartElement.querySelector(':scope > div:first-child');
}
private getEChartExternalSliderInner(): Element | null {
return this.eChartExtSliderElement.querySelector(':scope > div:first-child');
}
private handleExtChartMouseDown(): void {
window.addEventListener('mouseup', this.echartExtSliderMouseUp);
}
private handleExtChartMouseUp(event: MouseEvent): void {
window.removeEventListener('mouseup', this.echartExtSliderMouseUp);
const newEvent = new MouseEvent('mouseup', event);
setTimeout(() => {
this.getEChartExternalSliderInner()?.dispatchEvent(newEvent);
this.cdRef.markForCheck();
}, 1);
}
private handleChartMouseDown(): void {
window.addEventListener('mouseup', this.echartMouseUp);
}
private handleChartMouseUp(event: MouseEvent): void {
window.removeEventListener('mouseup', this.echartMouseUp);
const newEvent = new MouseEvent('mouseup', event);
setTimeout(() => {
this.getEChartInner()?.dispatchEvent(newEvent);
this.cdRef.markForCheck();
}, 1);
}
private setDataZoomRange(skipUpdate?: boolean): void {
// Checking if we received a valid dataZoomRange Object
const dataZoomRange = this.dataZoomRange();
Iif (dataZoomRange && Object.keys(dataZoomRange).length > 0) {
// If series has data, then directly dispatch action for the dataZoom event
// Else, Store the dataZoomRange values in presetDataZoomRange variable for applying zoom
// after data is received in chart
// No need to reassign presetDataZoomRange if earlier value is not consumed
if (this.hasData()) {
const dz = this.getPresetDataZoom(dataZoomRange);
if (dz) {
const requested = { ...dataZoomRange };
this.presetDataZoomRange = undefined;
this.updateDataZoom(dz);
if (!skipUpdate) {
this.updateEChart(false, { dataZoom: [dz] });
}
// update user with proper data
setTimeout(() => {
this.ngZone.runOutsideAngular(() => {
this.requestedDataZoom = requested;
this.handleDataZoom(dz, 'setDataZoomRange');
});
});
return;
}
}
this.presetDataZoomRange = dataZoomRange;
}
}
private handleDataZoom(event: any, source?: string): void {
// events can be batched
if (event.batch?.length) {
event = event.batch[0];
}
if (Number.isNaN(event.start) || Number.isNaN(event.end)) {
// need to fix to the last valid dataZoom setting, see below
this.chart.dispatchAction({ type: 'dataZoom', ...this.lastValidDataZoom });
return;
}
const effectiveOpts = this.getOptionNoClone();
// in case of pane by chart area, event.start and event.end are always undefined.
// and in case of slider move, they has values in percentage(0-100)
// so, to handle in case of pane, we need to get start and end values from datazoom property
// following condition will be executed only if autozoom is false; and start and end are undefined(undefined means call is from pane)
const dz = effectiveOpts.dataZoom[0];
this.autoZoomUpdate = !!dz && dz.end === 100;
// Due to chart updates outside Angular, we need to emit events back
// inside Angular to activate Angular's change detection.
const range = this.getVisibleRange();
if (range) {
range.source = source ?? event.source;
this.calculateVisibleRange(range);
if (this.requestedDataZoom) {
range.requested = this.requestedDataZoom;
this.requestedDataZoom = undefined;
}
this.ngZone.run(() => {
this.dataZoom.emit(range);
this.timeRangeChange.emit(
dz.start === 0 && dz.end === 100 ? 0 : range.rangeEnd - range.rangeStart
);
});
setTimeout(() => this.checkGridSizeChange());
this.presetDataZoomRange = undefined;
this.dataZoomSetupDone = true;
// sync/store values
this.updateDataZoom({ startValue: range.rangeStart, endValue: range.rangeEnd });
if (event.source !== 'extSlider') {
this.extZoomSliderChart?.dispatchAction({
type: 'dataZoom',
source: 'mainChart',
startValue: range.rangeStart,
endValue: range.rangeEnd
});
}
}
this.cdRef.markForCheck();
}
private handleExtDataZoom(event: any): void {
if (event.batch?.length) {
event = event.batch[0];
}
if (event.source === 'mainChart') {
return;
}
const zoomModel = (this.extZoomSliderChart as any)._model;
const range = this.doGetVisibleRange(zoomModel);
if (range) {
this.calculateVisibleRange(range);
this.chart?.dispatchAction({
type: 'dataZoom',
source: 'extSlider',
startValue: range.rangeStart,
endValue: range.rangeEnd
});
}
}
protected handleSelectionChanged(event: any): void {
this.selectionChanged.emit(event);
for (const a in event.selected) {
if (event.selected[a] !== false) {
return;
}
}
this.saveCurrentDataZoom();
}
/**
* Creates two objects that stores the colors for selected and unselected series. Used only for custom legend actions.
*/
protected fetchSeriesColors(colorsToBeUSed?: any): void {
const options = this.actualOptions;
if (!options.color?.length && this.activeTheme) {
options.color = [...this.activeTheme.color];
}
if (!colorsToBeUSed && !this.activeTheme) {
return;
}
options.series?.forEach((element, index) => {
this.unselectedSeriesColors[element.name!] = {
color: this.getThemeValue(['legend', 'unselected', 'color'], '#ccc'),
index
};
const colors = colorsToBeUSed ?? this.activeTheme.color;
this.selectedSeriesColors[element.name!] = { color: colors[index], index };
});
}
/**
* Handles legend select event in non echart native way.
* @param event - legend select
*/
protected handleSelectionChangedCustom(event: any): void {
const optionsToChange = this.styleSelectedSeries(event.name, false, event.dataIndex);
this.ngZone.runOutsideAngular(() => {
this.chart.setOption(optionsToChange);
this.chart.dispatchAction({ type: 'legendSelect', name: event.name });
});
}
/**
* Handles click on series in non echart native way.
* @param event - click
*/
protected handleClickOnChart(event: any, toggleVisibility: boolean): void {
if (event.componentType !== 'series') {
return;
}
if (toggleVisibility) {
const optionsToChange = this.styleSelectedSeries(event.seriesName, true, event.dataIndex);
this.chart.setOption(optionsToChange);
} else {
this.ngZone.run(() =>
this.chartSeriesClick.emit({
itemName: event.seriesName,
dataIndex: event.dataIndex
})
);
}
}
/**
* Selects or unselects the series based on series state object
* @param seriesName - series to be selected/unselected
* @param emit - if true event is emitted otherwise no event is emitted
*/
protected styleSelectedSeries(seriesName: string, emit: boolean, seriesDataIndex: number): any {
if (this.seriesSelectionState?.[seriesName]) {
const elementToStyle = this.actualOptions.series?.find(
element => element.name === seriesName
);
this.seriesSelectionState[seriesName] = false;
return this.selectSeries(elementToStyle, emit, seriesDataIndex);
} else {
const elementToStyle = this.actualOptions.series?.find(
element => element.name === seriesName
);
this.seriesSelectionState[seriesName] = true;
return this.unselectSeries(elementToStyle, emit, seriesDataIndex);
}
}
/**
* Selects the series
* @param element - to be styled as selected
* @param emit - if true event is emitted otherwise no event is emitted
*/
protected selectSeries(element: any, emit: boolean, seriesDataIndex: number): any {
const options = this.actualOptions;
const optionsToChange = { color: options.color, series: [options.series] };
const optionsColorIndex = this.selectedSeriesColors[element.name].index;
optionsToChange.color[optionsColorIndex] = this.selectedSeriesColors[element.name].color;
if (element.areaStyle) {
element.areaStyle.opacity = 0.4;
optionsToChange.series[this.selectedSeriesColors[element.name].index] = element;
}
if (emit) {
this.chartSeriesClick.emit({
itemName: element.name,
dataIndex: seriesDataIndex,
selected: false,
color: this.selectedSeriesColors[element.name].color
});
}
return optionsToChange;
}
/**
* Unselects the series
* @param element - to be styled as unselected
* @param emit - if true event is emitted otherwise no event is emitted
*/
protected unselectSeries(
element: any,
emit: boolean,
seriesDataIndex: number
): {
color: any;
series: (EChartSeries | undefined)[];
} {
const options = this.actualOptions;
const optionsToChange = { color: options.color, series: [options.series] };
const optionsColorIndex = this.selectedSeriesColors[element.name].index;
optionsToChange.color[optionsColorIndex] = this.unselectedSeriesColors[element.name].color;
if (element.areaStyle) {
element.areaStyle.opacity = 0;
optionsToChange.series[this.unselectedSeriesColors[element.name].index] = element;
}
if (emit) {
this.chartSeriesClick.emit({
itemName: element.name,
dataIndex: seriesDataIndex,
selected: true,
color: this.selectedSeriesColors[element.name].color
});
}
return optionsToChange;
}
private isValidDataZoomValue(val: any): boolean {
return val !== null && val !== undefined && !Number.isNaN(val);
}
private saveCurrentDataZoom(): void {
const options = this.actualOptions;
if (!options.grid || !options.dataZoom) {
return;
}
// When the last item on the legend is disabled, remember the current valid
// dataZoom setting. Due to a bug in ECharts it happens
// that the zoom slider disappears not to ever reappear again. To work around
// the problem, we simply inject the last valid dataZoom settings saved here
// once the invalid values (NaN) are detected
const currentOpts = this.getOptionNoClone();
if (!currentOpts?.dataZoom?.[0]) {
return;
}
const dz = currentOpts.dataZoom[0];
if (dz) {
this.lastValidDataZoom = {};
if (this.isValidDataZoomValue(dz.startValue)) {
this.lastValidDataZoom.startValue = dz.startValue;
} else if (this.isValidDataZoomValue(dz.start)) {
this.lastValidDataZoom.start = dz.start;
}
if (this.isValidDataZoomValue(dz.endValue)) {
this.lastValidDataZoom.endValue = dz.endValue;
} else if (this.isValidDataZoomValue(dz.end)) {
this.lastValidDataZoom.end = dz.end;
}
}
}
/**
* Get color by series name.
*/
getSeriesColorBySeriesName(seriesName: string): string | undefined {
return this.doGetSeriesColorBySeriesName(seriesName).color;
}
private doGetSeriesColorBySeriesName(seriesName: string): {
color: string | undefined;
altName: boolean;
} {
const ecModel = this.internalGetModel();
const ecSeries = ecModel.getSeriesByName(seriesName);
if (ecSeries && ecSeries.length > 0) {
return { color: ecSeries[0].getData().getVisual('style')?.fill as string, altName: false };
}
let ret = { color: undefined as string | undefined, altName: false };
ecModel.eachRawSeries((seriesModel: any) => {
const idx = seriesModel.legendVisualProvider?.indexOfName(seriesName) ?? -1;
if (idx >= 0) {
ret = {
color: seriesModel.legendVisualProvider.getItemVisual(idx, 'style')?.fill as string,
altName: true
};
}
});
return ret;
}
private applyColorsToCustomLegends(): void {
Eif (!this.showLegend() || !this.showCustomLegend()) {
return;
}
this.customLegend.forEach(cl => {
cl.customLegends.forEach(legendAxis => {
legendAxis?.list.forEach(legend => {
const color = this.doGetSeriesColorBySeriesName(legend.name);
legend.color = color.color;
legend.alternativeNaming = color.altName;
});
});
});
this.cdRef.markForCheck();
}
private handleUpdateAxisPointer(event: any): void {
if (
event.seriesIndex !== this.prevAxisPointer.seriesIndex ||
event.dataIndex !== this.prevAxisPointer.dataIndex
) {
this.prevAxisPointer.seriesIndex = event.seriesIndex;
this.prevAxisPointer.dataIndex = event.dataIndex;
if (this.axisPointer() && event.seriesIndex === undefined) {
return;
}
// Due to chart updates outside Angular, we need to emit events back
// inside Angular to activate Angular's change detection.
this.ngZone.run(() => {
this.pointer.emit({
seriesIndex: event.seriesIndex,
dataIndex: event.dataIndex
});
});
}
}
/**
* Get current data zoom range.
*/
getVisibleRange(): DataZoomEvent | undefined {
return this.doGetVisibleRange(this.internalGetModel());
}
protected internalGetModel(): any {
return (this.chart as any)._model;
}
/**
* returns the current EChart options, w/o cloning anything. Be very careful
* not to change anything in the data structure in it.
*/
getOptionNoClone(): any {
return this.internalGetModel().option;
}
protected parsePercent(percent: string | number, all: number): number {
if (typeof percent === 'string') {
if (percent.match(/\d+%/)) {
return (parseFloat(percent) / 100) * all;
}
return parseFloat(percent);
}
return percent;
}
private doGetVisibleRange(zoomModel: any): DataZoomEvent | undefined {
const effectiveOpts: any = zoomModel.option;
const xAxis = effectiveOpts.xAxis?.[0];
const dz = effectiveOpts.dataZoom[0];
const rangeStartArray: number[] = [];
const rangeEndArray: number[] = [];
for (let i = 0; i < effectiveOpts.xAxis?.length; i++) {
const axis = zoomModel.getComponent('xAxis', i);
const extent = axis?.axis?.scale?.getExtent();
if (extent?.length) {
if (this.isValidDataZoomValue(extent[0])) {
rangeStartArray.push(extent[0]);
}
if (this.isValidDataZoomValue(extent[1])) {
rangeEndArray.push(extent[1]);
}
}
}
const rangeStart = rangeStartArray.length ? Math.min(...rangeStartArray) : dz?.startValue;
const rangeEnd = rangeEndArray.length ? Math.max(...rangeEndArray) : dz?.endValue;
if (!this.isValidDataZoomValue(rangeEnd)) {
return;
}
let gridWidth: number | undefined;
if (effectiveOpts.grid && effectiveOpts.grid.length > 0) {
const width = this.chart.getWidth();
const grid = effectiveOpts.grid[0];
gridWidth =
width - this.parsePercent(grid.left, width) - this.parsePercent(grid.right, width);
}
return {
rangeType: xAxis.type,
rangeStart,
rangeEnd,
width: gridWidth,
autoZoomUpdate: this.autoZoomUpdate
};
}
protected updateEChart(force = false, options?: EChartOption): void {
Iif (!this.chart) {
return;
}
let axisDZUpdated = this.updateAxisAndDataZoom(options);
options ??= this.actualOptions;
const isFilledArray = (v: any): boolean => Array.isArray(v) && v.length > 0;
Iif (
isFilledArray(options.grid) &&
isFilledArray(options.xAxis) &&
isFilledArray(options.dataZoom)
) {
// adjust grid for axis labels
let max = 0;
options.yAxis.forEach((axis: any) => {
if (axis.position !== 'right' && isFilledArray(axis.data)) {
axis.data.forEach((label: string) => {
const width = this.calculateTextWidth(label);
max = Math.max(max, width);
});
}
});
max += 16; // long text getting truncated, so add some padding
const grids = options.grid as GridComponentOption[];
grids.forEach(g => (g.left = Math.max(g.left as number, max)));
// update dataZoom if not already set
const zoom = options.dataZoom![0];
if (
!this.isValidDataZoomValue(zoom?.startValue) &&
!this.isValidDataZoomValue(zoom?.endValue) &&
!this.isValidDataZoomValue(zoom?.end)
) {
const range = this.getVisibleRange();
if (range) {
this.updateDataZoom({ startValue: range.rangeStart, endValue: range.rangeEnd });
}
}
// change in grid/axis requires a full update
force = true;
axisDZUpdated = true;
}
this.ngZone.runOutsideAngular(() => {
this.chart.setOption(options!, force);
this.setZoomMode();
Iif (axisDZUpdated && this.externalZoomSlider()) {
this.extZoomSliderChart.setOption(this.extZoomSliderOptions, false);
}
});
setTimeout(() => this.checkGridSizeChange());
}
protected updateAxisAndDataZoom(inOptions?: EChartOption): boolean {
const options = this.actualOptions;
if (!options.xAxis) {
return false;
}
const isFull = !inOptions || inOptions === options;
inOptions = inOptions ?? {};
Iif (!isFull && !inOptions.series && !options.dataZoom) {
return false;
}
const xAxis = Array.isArray(options.xAxis) ? options.xAxis : [options.xAxis];
if (!isFull && !inOptions.xAxis) {
// for delta update, make sure we have same-sized axis array
inOptions.xAxis = xAxis.map(() => ({}));
}
const minMax = this.getSeriesMinMax();
// extend range if DZ is bigger than actual data
const dz = inOptions?.dataZoom?.[0];
Iif (
dz?.startValue != null &&
(minMax.min === undefined || (dz.startValue as number) < minMax.min)
) {
minMax.min = dz.startValue as number;
}
Iif (
dz?.endValue != null &&
(minMax.max === undefined || (dz.endValue as number) > minMax.max)
) {
minMax.max = dz.endValue as number;
}
// Update all sub chart index to be controlled by the dataZoom
let xAxisIndexes: number[] = [];
xAxis.forEach((axis, index) => {
Iif (axis.gridIndex >= 0) {
// set min/max the same on all axis so that datazoom can work
axis.min = minMax.min;
axis.max = minMax.max;
if (!isFull) {
inOptions.xAxis[index].min = minMax.min;
inOptions.xAxis[index].max = minMax.max;
}
xAxisIndexes.push(index);
}
});
// update dataZoom
const effectiveOpts = this.getOptionNoClone();
const effectiveXAxis = effectiveOpts.xAxis;
Iif (effectiveXAxis.length > 1) {
// 1. find out all visible series
// 2. find out valid x index
// 3. remove invalid x axis from the xAxisIndex array
const validXAxis = this.getValidXAxis();
if (validXAxis) {
xAxisIndexes = xAxisIndexes.filter(index => validXAxis.has(index));
}
}
Iif (xAxisIndexes.length) {
const allDataZoom = options.dataZoom!;
allDataZoom.forEach(zoom => (zoom.xAxisIndex = xAxisIndexes));
if (!isFull && inOptions.dataZoom) {
inOptions.dataZoom.forEach(zoom => (zoom.xAxisIndex = xAxisIndexes));
}
}
// update external slider if required
Iif (this.externalZoomSlider()) {
const extSliderAxis = this.extZoomSliderOptions.xAxis[0];
if (extSliderAxis.min !== minMax.min || extSliderAxis.max !== minMax.max) {
extSliderAxis.min = minMax.min;
extSliderAxis.max = minMax.max;
this.extZoomSliderOptions.series![0].data = [
[minMax.min, null],
[minMax.max, null]
];
}
}
return true;
}
/**
* Send action to echart.
* @see https://echarts.apache.org/en/api.html#action
*/
dispatchEChartAction(action: echarts.Payload): void {
Iif (!this.chart) {
return;
}
this.ngZone.runOutsideAngular(() => {
this.chart.dispatchAction(action);
});
this.cdRef.markForCheck();
}
private getSeriesMinMax(visibleOnly = false): {
min: number | undefined;
max: number | undefined;
} {
const legend = visibleOnly ? this.internalGetModel().getComponent('legend') : undefined;
let min: number | undefined;
let max: number | undefined;
this.actualOptions.series?.forEach(s => {
const seriesData = s.data as any[];
Eif (seriesData?.length > 1 && (!legend || legend.isSelected(s.name))) {
const start = seriesData[0][0]?.valueOf();
const last = seriesData[seriesData.length - 1];
// end value is can be undefined sometimes, if we don't have milliseconds as a value, instead
// we have value[] array of Date, so to handle that scenario we are taking value[0].valueOf() to
// calculate the millisecond value i.e from Date(value[0])
const end = last[0]?.valueOf() ?? last.value?.[0]?.valueOf();
if (this.isValidDataZoomValue(start) && this.isValidDataZoomValue(end)) {
Eif (min === undefined || start < min) {
min = start;
}
Eif (max === undefined || end > max) {
max = end;
}
}
}
});
return { min, max };
}
private calculateVisibleRange(range: DataZoomEvent | undefined): void {
const options = this.actualOptions;
if (!options.xAxis || !this.hasDataZoom() || !range) {
return;
}
if (!Array.isArray(options.xAxis) && options.xAxis.type === 'category') {
this.visibleRange.set(Math.ceil(range.rangeEnd) - Math.floor(range.rangeStart));
} else {
this.visibleRange.set(Math.round(range.rangeEnd - range.rangeStart));
}
// once in range mode, disable the entries mode to prevent overriding the user
this.visibleEntries.set(-1);
}
private getValueFromSeriesPoint(point: any): any[] {
return Array.isArray(point) ? point : point.value;
}
private calculateZoomStartValue(): any {
const options = this.actualOptions;
if (!options.series) {
return null;
}
const seriesData = options.series[this.autoZoomSeriesIndex()]?.data as any[];
if (!seriesData) {
return null;
}
if (this.visibleEntries() > -1) {
const offset = Math.min(seriesData.length, this.visibleEntries());
const data = seriesData[seriesData.length - offset];
return data ? this.getValueFromSeriesPoint(data)[0] : null;
} else if (this.visibleRange() > -1) {
const minMax = this.getSeriesMinMax(true);
if (minMax.min && minMax.max) {
// make sure startValue is >= the min data value
return Math.max(minMax.min, minMax.max - this.visibleRange());
}
const data = seriesData[seriesData.length - 1];
return data ? this.getValueFromSeriesPoint(data)[0] - this.visibleRange() : null;
}
return null;
}
protected hasData(): boolean {
return this.actualOptions.series?.some(s => (s.data as any[])?.length > 0) ?? false;
}
/**
* Re-render the chart series data. This method should be called on series data changes.
*/
refreshSeries(isLive: boolean = true, dzToSet?: DataZoomRange): void {
dzToSet ??= this.presetDataZoomRange;
const optionsToUpdate: any = {
series: this.actualOptions.series
};
Iif (!isLive) {
this.updateEChart(false, optionsToUpdate);
return;
}
Iif (this.hasDataZoom() && this.hasData()) {
if (dzToSet) {
this.dataZoomSetupDone = true;
const dz = this.getPresetDataZoom(dzToSet);
if (dz) {
const requested = { ...dzToSet };
this.presetDataZoomRange = undefined;
this.updateDataZoom(dz, optionsToUpdate);
// dispatch the same async. reasoning: the sync here is needed to prevent
// flickering, the async dispatch to ensure a DataZoomEvent is fired so
// that any consumer of this event work as expected
setTimeout(() => {
this.ngZone.runOutsideAngular(() => {
this.requestedDataZoom = requested;
this.handleDataZoom(dz, 'refreshSeries');
});
});
}
} else if (!this.dataZoomSetupDone) {
// need to do this async to have the data in ECharts
setTimeout(() => {
if (!this.dataZoomSetupDone && !this.dataZoomRange() && this.chart) {
this.calculateVisibleRange(this.getVisibleRange());
}
this.dataZoomSetupDone = true;
});
} else if (this.zoomSlider() && this.autoZoomUpdate && this.autoZoomSeriesIndex() !== -1) {
// this ensures the slider is at the end and the window size remains stable, showing new data
const startValue = this.calculateZoomStartValue();
if (this.isValidDataZoomValue(startValue)) {
this.updateDataZoom({ startValue, end: 100 }, optionsToUpdate);
}
if (isLive) {
this.dispatchEChartAction({ type: 'hideTip' });
}
} else {
// this ensures the current displayed window stays stable as new data arrives
const dz = this.getOptionNoClone().dataZoom[0];
if (
this.isValidDataZoomValue(dz.startValue) &&
this.isValidDataZoomValue(dz.endValue) &&
dz.end !== 100
) {
this.updateDataZoom(
{ startValue: dz.startValue, endValue: dz.endValue },
optionsToUpdate
);
}
}
}
this.updateEChart(false, optionsToUpdate);
}
// this ensures DZ is in sync everywhere
private updateDataZoom(dz: DataZoomRange, optionsToUpdate?: EChartOption): void {
const options = this.actualOptions;
if (options.dataZoom?.[0]) {
this.doUpdateDZ(dz, options.dataZoom[0]);
}
if (optionsToUpdate && optionsToUpdate !== options) {
if (Array.isArray(optionsToUpdate.dataZoom)) {
this.doUpdateDZ(dz, optionsToUpdate.dataZoom[0]);
} else if (optionsToUpdate.dataZoom) {
this.doUpdateDZ(dz, optionsToUpdate.dataZoom);
} else {
optionsToUpdate.dataZoom = [{ ...dz }];
}
}
if (this.externalZoomSlider()) {
this.doUpdateDZ(dz, this.extZoomSliderOptions.dataZoom![0]);
}
}
private doUpdateDZ(dz: DataZoomRange, dzOptions: DataZoomComponentOption): void {
// make sure only to have value or percent
if (this.isValidDataZoomValue(dz.startValue)) {
dzOptions.startValue = dz.startValue;
dzOptions.start = undefined;
} else if (this.isValidDataZoomValue(dz.start)) {
dzOptions.start = dz.start;
dzOptions.startValue = undefined;
}
if (this.isValidDataZoomValue(dz.endValue)) {
dzOptions.endValue = dz.endValue;
dzOptions.end = undefined;
} else if (this.isValidDataZoomValue(dz.end)) {
dzOptions.end = dz.end;
dzOptions.endValue = undefined;
}
}
protected applyStyles(): void {
const bodyStyle: CSSStyleDeclaration = window.getComputedStyle(document.body);
const options = this.actualOptions;
options.textStyle = {
fontFamily: navigator.webdriver ? 'sans-serif' : bodyStyle.fontFamily,
fontSize: bodyStyle.fontSize
};
this.extZoomSliderOptions.textStyle = options.textStyle;
}
protected addLegendItem(
name: string,
visible?: boolean | null,
index: number = 0,
gridIndex: number = 0,
customLegendProp?: CustomLegendProps,
seriesSymbol?: string
): void {
const options = this.actualOptions;
Iif (!options.legend?.length) {
return;
}
const legend = options.legend[options.legend.length > index ? index : 0];
const unitText = customLegendProp ? customLegendProp.unit : undefined;
const customLegendItem: CustomLegendItem = {
name: '',
displayName: '',
color: '',
selected: false,
tooltip: customLegendProp ? customLegendProp.tooltip : '',
symbol: this.getPath(seriesSymbol, false)
};
legend.data?.push({
name,
icon: this.getPath(seriesSymbol, true)
});
legend.selected ??= {};
Iif (visible !== null && visible !== undefined) {
legend.selected[name] = visible;
customLegendItem.selected = visible;
}
const showCustomLegend = this.showCustomLegend();
Iif (this.showLegend() && showCustomLegend) {
if (visible !== false) {
customLegendItem.selected = true;
}
customLegendItem.name = name;
customLegendItem.displayName = customLegendProp?.displayName ?? name;
if (showCustomLegend) {
this.addCustomLegend(customLegendItem, unitText, index, gridIndex);
}
}
this.cdRef.markForCheck();
}
private getPath(seriesSymbol: string | undefined, prefix: boolean): string {
const path = seriesSymbol ? this.shapePaths[seriesSymbol] : this.shapePaths.circle;
return prefix ? 'path://' + path : path;
}
private addCustomLegend(
customLegendItem: CustomLegendItem,
unitText: string | undefined,
index: number,
gridIndex: number = 0
): void {
if (this.actualOptions.legend) {
if (!this.customLegend[gridIndex].customLegends) {
this.customLegend[gridIndex].customLegends = [
{ list: [], unit: '' },
{ list: [], unit: '' }
];
}
// index = 0 means left legend
if (index === 0) {
if (!this.customLegend[gridIndex]?.customLegends[0]?.list) {
this.customLegend[gridIndex].customLegends[0] = { list: [customLegendItem] };
} else {
// legend with same id and name not found
this.customLegend[gridIndex].customLegends[0].list.push(customLegendItem);
}
this.customLegend[gridIndex].customLegends[0].unit = unitText;
} else {
// index = 1 means right legend
if (!this.customLegend[gridIndex]?.customLegends[1]?.list) {
this.customLegend[gridIndex].customLegends[1] = { list: [customLegendItem] };
} else {
this.customLegend[gridIndex].customLegends[1].list.push(customLegendItem);
}
this.customLegend[gridIndex].customLegends[1].unit = unitText;
}
this.applyCustomLegendPosition();
}
}
/**
* Show loading indicator.
*/
public startProgressIndication(): void {
this.inProgress.set(true);
}
/**
* Hide loading indicator.
*/
public stopProgressIndication(): void {
this.inProgress.set(false);
}
/**
* Set the data zoom range for the chart in milliseconds.
* As an example one hour is the value 3600000.
*/
setTimeRange(range: number): void {
const currentDZ = this.getVisibleRange();
const minMax = this.getSeriesMinMax(true);
if (!currentDZ || minMax.min == null || minMax.max == null) {
return;
}
const mid = (currentDZ.rangeStart + currentDZ.rangeEnd) / 2;
const halfRange = range / 2;
let start: number;
let end: number;
if (range === 0 || range > minMax.max - minMax.min) {
start = minMax.min;
end = minMax.max;
} else {
start = mid - halfRange;
end = mid + halfRange;
// at start
if (start < minMax.min) {
start = minMax.min;
end = start + range;
}
// at end. Special case: if already at end, keep end
if (end > minMax.max || currentDZ.rangeEnd === minMax.max) {
start = minMax.max - range;
end = minMax.max;
}
}
this.dispatchEChartAction({ type: 'dataZoom', startValue: start, endValue: end });
}
protected addDataInternal(series: SeriesUpdate<any>[]): void {
const options = this.actualOptions;
series.forEach(update => {
const currentSeries = options.series![update.index];
Iif (!currentSeries) {
return;
}
const seriesData = currentSeries.data as any[];
seriesData.push(update.data);
if (this.maxEntries() > 0 && seriesData.length > this.maxEntries()) {
seriesData.splice(0, seriesData.length - this.maxEntries());
}
});
this.refreshSeries();
}
private getPresetDataZoom(range: DataZoomRange): any {
let ret: any;
if (range.visibleWidth && this.autoZoomSeriesIndex() !== -1) {
this.visibleRange.set(range.visibleWidth);
const startValue = this.calculateZoomStartValue();
if (this.isValidDataZoomValue(startValue)) {
this.autoZoomUpdate = true;
ret = { startValue, end: 100 };
}
} else if (
this.isValidDataZoomValue(range.startValue) &&
this.isValidDataZoomValue(range.endValue)
) {
// handling the case when startValue and endValue is given as a fixed time interval
ret = {
startValue: range.startValue,
endValue: range.endValue
};
this.autoZoomUpdate = false;
} else {
ret = { ...range };
}
return ret;
}
private checkGridSizeChange(): void {
Iif (!this.chart) {
return;
}
const gridRectNew: GridRectCoordinate =
this.internalGetModel()?.getComponent('grid')?.coordinateSystem?._rect;
Iif (gridRectNew) {
const nativeWrapper = this.chartContainerWrapper().nativeElement as HTMLElement;
gridRectNew.containerWidth = nativeWrapper.offsetWidth;
gridRectNew.containerHeight = nativeWrapper.offsetHeight;
let isGridResized = false;
for (const objKey of Object.keys(this.gridCoordinates) as (keyof GridRectCoordinate)[]) {
if (this.gridSizeItemChanged(gridRectNew[objKey], this.gridCoordinates[objKey])) {
isGridResized = true;
break;
}
}
if (isGridResized) {
// update new coordinates and emit event
this.gridCoordinates = gridRectNew;
this.timeBarLeft.set(this.gridCoordinates.x);
this.timeBarRight.set(
this.gridCoordinates.containerWidth - this.gridCoordinates.x - this.gridCoordinates.width
);
if (this.externalZoomSlider() && Array.isArray(this.extZoomSliderOptions?.grid)) {
this.extZoomSliderOptions.grid[0].left = this.timeBarLeft();
this.extZoomSliderOptions.grid[0].right = this.timeBarRight();
this.extZoomSliderChart.setOption({ grid: this.extZoomSliderOptions.grid }, false);
}
this.ngZone.run(() => this.chartGridResized.emit(this.gridCoordinates));
}
}
this.cdRef.markForCheck();
}
private gridSizeItemChanged(a: any, b: any): boolean {
return Array.isArray(a)
? a.length !== b.length || (a as any[]).some((item, index) => item !== b[index])
: a !== b;
}
private setContainerHeight(): void {
const newHeight = parseInt(this.eChartContainerHeight()!, 10) || null;
if (newHeight !== this.containerHeight()) {
this.containerHeight.set(newHeight);
this.ngZone.runOutsideAngular(() => {
this.chart?.resize({ width: this.curWidth, height: newHeight ?? this.curHeight });
if (this.externalZoomSlider()) {
this.extZoomSliderChart.resize();
}
});
}
}
private updateCustomLegendMultiLineInfo(): void {
const event: CustomLegendMultiLineInfo[] = [];
this.siCustomLegend().forEach((legend, index) => {
event.push({
customLegendId: index,
isCustomLegendMultilined: legend.customLegendContainer().nativeElement.offsetHeight > 20
});
});
Iif (
event.length !== this.customLegendsMultiLineInfo.length ||
event.some(
(e, index) =>
e.isCustomLegendMultilined !==
this.customLegendsMultiLineInfo[index].isCustomLegendMultilined
)
) {
this.customLegendsMultiLineInfo = event;
this.customLegendMultiLineInfoEvent.emit(event);
}
this.cdRef.markForCheck();
}
}
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