Pull request #5411: Bugfix/DXCF-5718 chart drawings unhide all drawin…

…gs button is visible while nothing to unhide

Merge in DXCHARTS/dxchart5 from bugfix/DXCF-5718-chart-drawings-unhide-all-drawings-button-is-visible-while-nothing-to-unhide to master

* commit '76ebc09bd7d3b86b29787233ba0a68e173471517':
  [DXCF-5718] Chart Drawings - Unhide all drawings button is visible while nothing to unhide // copy
  [DXCF-5718] Chart Drawings - Unhide all drawings button is visible while nothing to unhide // init
  [DXCF-5718] Chart Drawings - Unhide all drawings button is visible while nothing to unhide // init

GitOrigin-RevId: 62f7973fb076a46835ef87b1ad3ec7d1c99cbced

src/chart/canvas/canvas-bounds-container.ts

@@ -1,8 +1,3 @@
-/*
- * 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/.
- */
 /*
  * 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.
@@ -560,11 +555,11 @@ export class CanvasBoundsContainer {
 		}
 
 		//#region chart height ratio logic
-		if (this.graphsHeightRatio[CHART_UUID] === 0) {
+		if (!this.graphsHeightRatio[CHART_UUID] || this.graphsHeightRatio[CHART_UUID] === 0) {
 			chartRatio = 0;
 		}
 
-		if (this.graphsHeightRatio[CHART_UUID] !== 0) {
+		if (this.graphsHeightRatio[CHART_UUID] && this.graphsHeightRatio[CHART_UUID] !== 0) {
 			if (paneIsAdded) {
 				chartRatio = 1 * ratioForOldPec;
 			} else {