Update charts.

Author: gk-brown

sierra-test/src/main/java/org/httprpc/sierra/test/ChartsTest.java

@@ -305,6 +305,8 @@ private ScatterChart<Integer, Double> createScatterChart() {
         for (var i = 0; i < m; i++) {
             var dataSet = new DataSet<Integer, Double>(String.format("Group %d", i + 1), colors.get(i));
 
+            dataSet.setStroke(new BasicStroke(1.0f));
+
             var dataPoints = new TreeMap<Integer, Double>();
 
             var previousValue = i * 25.0;

sierra/src/main/java/org/httprpc/sierra/charts/ScatterChart.java

@@ -15,7 +15,6 @@
 package org.httprpc.sierra.charts;
 
 import javax.swing.Icon;
-import java.awt.BasicStroke;
 import java.awt.Component;
 import java.awt.Graphics;
 import java.awt.Graphics2D;
@@ -69,12 +68,14 @@ public void paintIcon(Component component, Graphics graphics, int x, int y) {
         }
 
         private void paintIcon(Graphics2D graphics, int x, int y) {
-            var lineWidth = outlineStroke.getLineWidth();
+            var stroke = dataSet.getStroke();
+
+            var lineWidth = stroke.getLineWidth();
 
             shape.setFrame(x + lineWidth / 2, y + lineWidth / 2, SIZE - lineWidth, SIZE - lineWidth);
 
             graphics.setColor(dataSet.getColor());
-            graphics.setStroke(outlineStroke);
+            graphics.setStroke(stroke);
 
             graphics.draw(shape);
         }
@@ -100,11 +101,6 @@ public int getIconHeight() {
 
     private static final int VALUE_MARKER_SIZE = 10;
 
-    private static final BasicStroke outlineStroke;
-    static {
-        outlineStroke = new BasicStroke(1.0f);
-    }
-
     /**
      * Constructs a new scatter chart.
      *
@@ -248,6 +244,7 @@ protected void draw(Graphics2D graphics) {
 
         for (var dataSet : getDataSets()) {
             var color = dataSet.getColor();
+            var stroke = dataSet.getStroke();
 
             var fillColor = colorWithAlpha(color, (int)(valueMarkerTransparency * 255));
 
@@ -257,7 +254,7 @@ protected void draw(Graphics2D graphics) {
                 graphics.fill(valueMarkerShape);
 
                 graphics.setColor(color);
-                graphics.setStroke(outlineStroke);
+                graphics.setStroke(stroke);
 
                 graphics.draw(valueMarkerShape);
             }