From e176bd4770ee1ef41f3a9e53aaf4d2f5c0f50ef5 Mon Sep 17 00:00:00 2001
From: Marc Jakobi <marc.jakobi@velasolaris.com>
Date: Mon, 4 Jan 2021 11:46:25 +0100
Subject: [PATCH] Issue #547: Re-add API endpoints required for manual zoom.

---
 .../xchart/internal/chartpart/Chart.java      | 48 +++++++++++++++++++
 1 file changed, 48 insertions(+)

diff --git a/xchart/src/main/java/org/knowm/xchart/internal/chartpart/Chart.java b/xchart/src/main/java/org/knowm/xchart/internal/chartpart/Chart.java
index 0bd12014c..83ca6f0cd 100644
--- a/xchart/src/main/java/org/knowm/xchart/internal/chartpart/Chart.java
+++ b/xchart/src/main/java/org/knowm/xchart/internal/chartpart/Chart.java
@@ -241,6 +241,54 @@ Format getYAxisFormat(String yAxisDecimalPattern) {
     return format;
   }
 
+  public double getChartXFromCoordinate(int screenX) {
+
+    if (axisPair == null) {
+      return Double.NaN;
+    }
+    return axisPair.getXAxis().getChartValue(screenX);
+  }
+
+  public double getChartYFromCoordinate(int screenY) {
+
+    if (axisPair == null) {
+      return Double.NaN;
+    }
+    return axisPair.getYAxis().getChartValue(screenY);
+  }
+
+  public double getChartYFromCoordinate(int screenY, int yIndex) {
+
+    if (axisPair == null) {
+      return Double.NaN;
+    }
+    return axisPair.getYAxis(yIndex).getChartValue(screenY);
+  }
+
+  public double getScreenXFromChart(double xValue) {
+
+    if (axisPair == null) {
+      return Double.NaN;
+    }
+    return axisPair.getXAxis().getScreenValue(xValue);
+  }
+
+  public double getScreenYFromChart(double yValue) {
+
+    if (axisPair == null) {
+      return Double.NaN;
+    }
+    return axisPair.getYAxis().getScreenValue(yValue);
+  }
+
+  public double getScreenYFromChart(double yValue, int yIndex) {
+
+    if (axisPair == null) {
+      return Double.NaN;
+    }
+    return axisPair.getYAxis(yIndex).getScreenValue(yValue);
+  }
+
   //  ArrayList<ChartPart> getAnnotations() {
   //
   //    return annotations;