Pull request #5302: [DXCF-5632] Legend (data box) - Time displayed in…

… the legend not aligned with the last candle's time // init

Merge in DXCHARTS/dxchart5 from bugfix/DXCF-5632-legend-data-box-time-displayed-in-the-legend-not-aligned-with-the-last-candle-s to master

* commit 'f5487b669849667d3e4de98b29b597139fe25f69':
  [DXCF-5632] Legend (data box) - Time displayed in the legend not aligned with the last candle's time // init
  [DXCF-5632] Legend (data box) - Time displayed in the legend not aligned with the last candle's time // init
  [DXCF-5632] Legend (data box) - Time displayed in the legend not aligned with the last candle's time // init

GitOrigin-RevId: da85659631588227078f467725eaf008d53eaa51

src/chart/inputhandlers/hover-producer.component.ts

@@ -1,9 +1,10 @@
 /*
- * Copyright (C) 2019 - 2023 Devexperts Solutions IE Limited
+ * Copyright (C) 2019 - 2024 Devexperts Solutions IE Limited
  * This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
  * If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
  */
 import { BehaviorSubject, merge } from 'rxjs';
+import { filter, switchMap } from 'rxjs/operators';
 import { CHART_UUID, CanvasBoundsContainer, CanvasElement } from '../canvas/canvas-bounds-container';
 import { FullChartConfig } from '../chart.config';
 import { ChartModel } from '../components/chart/chart.model';
@@ -94,11 +95,16 @@ export class HoverProducerComponent extends ChartBaseElement {
 	protected doActivate() {
 		super.doActivate();
 		this.addRxSubscription(
-			this.chartModel.candlesSetSubject.subscribe(() => {
-				// required for initial legend initialization, do not show cross tool
-				const lastCandle = this.chartModel.getLastVisualCandle();
-				lastCandle && this.createAndFireHoverFromCandle(lastCandle);
-			}),
+			// required for initial legend initialization, do not show cross tool
+			this.chartModel.candlesSetSubject
+				.pipe(
+					// check the scale is valid before doing candle-based hover event
+					switchMap(() => this.scale.initialViewportValidSubject.pipe(filter(Boolean))),
+				)
+				.subscribe(() => {
+					const lastCandle = this.chartModel.getLastVisualCandle();
+					lastCandle && this.createAndFireHoverFromCandle(lastCandle);
+				}),
 		);
 		this.addRxSubscription(
 			this.chartModel.candlesUpdatedSubject.subscribe(() => {

src/chart/model/scaling/viewport.model.ts

@@ -1,9 +1,9 @@
 /*
- * Copyright (C) 2019 - 2023 Devexperts Solutions IE Limited
+ * Copyright (C) 2019 - 2024 Devexperts Solutions IE Limited
  * This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
  * If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
  */
-import { Subject } from 'rxjs';
+import { BehaviorSubject, Subject } from 'rxjs';
 import { distinctUntilChanged, map, share } from 'rxjs/operators';
 import { ChartBaseElement } from '../chart-base-element';
 import { ViewportMovementAnimation } from '../../animation/types/viewport-movement-animation';
@@ -151,10 +151,18 @@ export abstract class ViewportModel extends ChartBaseElement implements Viewable
 		distinctUntilChanged((p, c) => p.start === c.start && p.end === c.end),
 		share(),
 	);
+	public initialViewportValidSubject = new BehaviorSubject(false);
 	//endregion
 
 	protected doActivate(): void {
 		super.doActivate();
+
+		this.addRxSubscription(
+			this.changed.subscribe(() => {
+				!this.initialViewportValidSubject.getValue() &&
+					this.initialViewportValidSubject.next(this.isViewportValid());
+			}),
+		);
 	}
 
 	protected doDeactivate(): void {