CSSTUDIO-1928-branch2 Add adjustment of range to LinearTicks.compute().

Author: abrahamwolk

app/rtplot/src/main/java/org/csstudio/javafx/rtplot/internal/LinearTicks.java

@@ -85,6 +85,17 @@ public Pair<Double, Double> adjustRange(Double low, Double high)
     @Override
     public void compute(Double low, Double high, final Graphics2D gc, final int screen_width)
     {
+        Pair<Double, Double> adjustedRange = adjustRange(low, high);
+        double newLow = adjustedRange.getKey();
+        double newHigh = adjustedRange.getValue();
+
+        if (newLow != low || newHigh != high) {
+            logger.log(Level.WARNING, "Bad value range for a linear scale {0} ... {1}. Adjusting the range to {2} ... {3}.",
+                    new Object[] {low, high, newLow, newHigh });
+            high = newHigh;
+            low = newLow;
+        }
+
         logger.log(Level.FINE, "Compute linear ticks, width {0}, for {1} - {2}",
                                new Object[] { screen_width, low, high });