Chapter 09 codes updated.

Author: liuyubobobo

09-Fractal-Drawing/02-Recursive-Circle-Drawing/src/AlgoFrame.java

@@ -1,19 +1,10 @@
-import java.awt.Graphics2D;
-import java.awt.Graphics;
-import java.awt.Dimension;
-import java.awt.Color;
-import java.awt.RenderingHints;
-import java.util.ArrayList;
-import java.util.Map;
-import java.util.HashMap;
-
+import java.awt.*;
 import javax.swing.*;
 
 public class AlgoFrame extends JFrame{
 
     private int canvasWidth;
     private int canvasHeight;
-    private JPanel canvas;
 
     public AlgoFrame(String title, int canvasWidth, int canvasHeight){
 
@@ -41,8 +32,8 @@ public AlgoFrame(String title){
     public int getCanvasHeight(){return canvasHeight;}
 
     // data
-    CircleData data;
-    public void setData(CircleData data){
+    private CircleData data;
+    public void render(CircleData data){
         this.data = data;
         repaint();
     }

09-Fractal-Drawing/02-Recursive-Circle-Drawing/src/AlgoVisHelper.java

@@ -1,11 +1,9 @@
 import javax.swing.*;
 import java.awt.*;
 import java.awt.geom.Ellipse2D;
-
 import java.awt.geom.Rectangle2D;
 import java.lang.InterruptedException;
 
-
 public class AlgoVisHelper {
 
     private AlgoVisHelper(){}
@@ -33,35 +31,35 @@ private AlgoVisHelper(){}
     public static final Color White = new Color(0xFFFFFF);
 
 
-    static public void strokeCircle(Graphics2D g, int x, int y, int r){
+    public static void strokeCircle(Graphics2D g, int x, int y, int r){
 
         Ellipse2D circle = new Ellipse2D.Double(x-r, y-r, 2*r, 2*r);
         g.draw(circle);
     }
 
-    static public void fillCircle(Graphics2D g, int x, int y, int r){
+    public static void fillCircle(Graphics2D g, int x, int y, int r){
 
         Ellipse2D circle = new Ellipse2D.Double(x-r, y-r, 2*r, 2*r);
         g.fill(circle);
     }
 
-    static public void strokeRectangle(Graphics2D g, int x, int y, int w, int h){
+    public static void strokeRectangle(Graphics2D g, int x, int y, int w, int h){
 
         Rectangle2D rectangle = new Rectangle2D.Double(x, y, w, h);
         g.draw(rectangle);
     }
 
-    static public void fillRectangle(Graphics2D g, int x, int y, int w, int h){
+    public static void fillRectangle(Graphics2D g, int x, int y, int w, int h){
 
         Rectangle2D rectangle = new Rectangle2D.Double(x, y, w, h);
         g.fill(rectangle);
     }
 
-    static public void setColor(Graphics2D g, Color color){
+    public static void setColor(Graphics2D g, Color color){
         g.setColor(color);
     }
 
-    static public void setStrokeWidth(Graphics2D g, int w){
+    public static void setStrokeWidth(Graphics2D g, int w){
         int strokeWidth = w;
         g.setStroke(new BasicStroke(strokeWidth, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND));
     }