OszilloscopeAxis: guard against range computation infinite loop

only recompute the range once per iteration. This prevents an infinite
range computation loop caused by the tick mark computation needed by the
range computation and calling the range compuation itself to compute the
ticks.

Author: wirew0rm

chartfx-chart/src/main/java/io/fair_acc/chartfx/axes/spi/OscilloscopeAxis.java

@@ -55,6 +55,7 @@ public class OscilloscopeAxis extends AbstractAxis implements Axis {
     private final StyleableDoubleProperty axisZeroValue = CSS.createDoubleProperty(this, "axisZeroValue", 0.0, true, null, this::requestAxisLayout);
     private final transient Cache cache = new Cache();
     protected boolean isUpdating;
+    private boolean computingRange = false;
 
     /**
      * Creates an {@link #autoRangingProperty() auto-ranging} Axis.
@@ -164,7 +165,11 @@ public double getAxisZeroValue() {
      * @return the range that is clamped to limits defined by {@link #getMinRange()} and {@link #getMaxRange()}.
      */
     public DataRange getClampedRange() {
-        recomputeClampedRange();
+        if (!computingRange) { // guard against infinite range computation loop
+            computingRange = true;
+            recomputeClampedRange();
+            computingRange = false;
+        }
         return clampedRange;
     }