Chapter 02 section 06 added.

Author: liuyubobobo

02-Java-Swing-Basics/05-Drawing-Refactor/src/AlgoFrame.java

@@ -0,0 +1,67 @@
+import java.awt.Graphics2D;
+import java.awt.Graphics;
+import java.awt.Dimension;
+import java.awt.Color;
+import java.awt.geom.Ellipse2D;
+import java.awt.RenderingHints;
+import java.awt.BasicStroke;
+
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+
+public class AlgoFrame extends JFrame{
+
+    private int canvasWidth;
+    private int canvasHeight;
+
+    public AlgoFrame(String title, int canvasWidth, int canvasHeight){
+
+        super(title);
+
+        this.canvasWidth = canvasWidth;
+        this.canvasHeight = canvasHeight;
+
+        AlgoCanvas canvas = new AlgoCanvas();
+        setContentPane(canvas);
+        pack();
+
+        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        setResizable(false);
+
+        setVisible(true);
+    }
+
+    public AlgoFrame(String title){
+
+        this(title, 1024, 768);
+    }
+
+    public int getCanvasWidth(){return canvasWidth;}
+    public int getCanvasHeight(){return canvasHeight;}
+
+    private class AlgoCanvas extends JPanel{
+
+        @Override
+        public void paintComponent(Graphics g) {
+            super.paintComponent(g);
+
+            Graphics2D g2d = (Graphics2D)g;
+
+            // 具体绘制
+            AlgoVisHelper.setColor(g2d, Color.BLUE);
+            AlgoVisHelper.fillCircle(g2d, canvasWidth/2,canvasHeight/2,200);
+
+            AlgoVisHelper.setStrokeWidth(g2d,5);
+            AlgoVisHelper.setColor(g2d, Color.RED);
+            AlgoVisHelper.strokeCircle(g2d, canvasWidth/2,canvasHeight/2,200);
+        }
+
+        @Override
+        public Dimension getPreferredSize(){
+            return new Dimension(canvasWidth, canvasHeight);
+        }
+
+    }
+}
+
+

02-Java-Swing-Basics/05-Advanced-Rendering/src/AlgoVisHelper.java renamed to 02-Java-Swing-Basics/05-Drawing-Refactor/src/AlgoVisHelper.java

@@ -7,24 +7,24 @@ public class AlgoVisHelper {
 
     private AlgoVisHelper(){}
 
-    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 setColor(Graphics2D g, Color color){
+    public static void setColor(Graphics2D g, Color color){
         g.setColor(color);
     }
 
-    static public void setStrokeWidth(Graphics2D g, int w){
-        int strokeWidth = 10;
+    public static void setStrokeWidth(Graphics2D g, int w){
+        int strokeWidth = w;
         g.setStroke(new BasicStroke(strokeWidth, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND));
     }
 }

02-Java-Swing-Basics/05-Advanced-Rendering/src/Main.java renamed to 02-Java-Swing-Basics/05-Drawing-Refactor/src/Main.java

@@ -6,7 +6,7 @@ public class Main {
     public static void main(String[] args) {
 
         EventQueue.invokeLater(() -> {
-            AlgoFrame frame = new AlgoFrame("Welcome",800,800);
+            AlgoFrame frame = new AlgoFrame("Welcome",500,500);
         });
     }
 }

02-Java-Swing-Basics/05-Advanced-Rendering/src/AlgoFrame.java renamed to 02-Java-Swing-Basics/06-Advanced-Rendering/src/AlgoFrame.java

@@ -39,52 +39,6 @@ public AlgoFrame(String title){
     public int getCanvasWidth(){return canvasWidth;}
     public int getCanvasHeight(){return canvasHeight;}
 
-
-//    private class AlgoCanvas extends JPanel{
-//
-//        public AlgoCanvas(){
-//            // 双缓存
-//            super(true);
-//        }
-//
-//        @Override
-//        public void paint(Graphics g) {
-//            super.paint(g);
-//
-//            Graphics2D g2d = (Graphics2D)g;
-//
-//            // 抗锯齿
-//            RenderingHints hints = new RenderingHints(
-//                                            RenderingHints.KEY_ANTIALIASING,
-//                                            RenderingHints.VALUE_ANTIALIAS_ON);
-//            hints.put(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
-//            g2d.addRenderingHints(hints);
-//
-//            // 具体绘制
-//            int strokeWidth = 10;
-//            g2d.setStroke(new BasicStroke(strokeWidth, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND));
-//
-//            g2d.setPaint(Color.RED);
-//            strokeCircle(g2d, canvasWidth/2,canvasHeight/2,300);
-//
-//            g2d.setPaint(Color.BLUE);
-//            fillCircle(g2d, canvasWidth/2,canvasHeight/2,300);
-//        }
-//
-//        /// 绘制辅助函数
-//        private 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);
-//        }
-//
-//        private 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);
-//        }
-//    }
-
     private class AlgoCanvas extends JPanel{
 
         public AlgoCanvas(){
@@ -102,16 +56,15 @@ public void paintComponent(Graphics g) {
             RenderingHints hints = new RenderingHints(
                                             RenderingHints.KEY_ANTIALIASING,
                                             RenderingHints.VALUE_ANTIALIAS_ON);
-            hints.put(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
             g2d.addRenderingHints(hints);
 
             // 具体绘制
-            AlgoVisHelper.setStrokeWidth(g2d,10);
-            AlgoVisHelper.setColor(g2d, Color.RED);
-            AlgoVisHelper.strokeCircle(g2d, canvasWidth/2,canvasHeight/2,300);
-
             AlgoVisHelper.setColor(g2d, Color.BLUE);
-            AlgoVisHelper.fillCircle(g2d, canvasWidth/2,canvasHeight/2,300);
+            AlgoVisHelper.fillCircle(g2d, canvasWidth/2,canvasHeight/2,200);
+
+            AlgoVisHelper.setStrokeWidth(g2d,5);
+            AlgoVisHelper.setColor(g2d, Color.RED);
+            AlgoVisHelper.strokeCircle(g2d, canvasWidth/2,canvasHeight/2,200);
         }
 
         @Override

02-Java-Swing-Basics/06-Advanced-Rendering/src/AlgoVisHelper.java

@@ -0,0 +1,30 @@
+import java.awt.BasicStroke;
+import java.awt.Color;
+import java.awt.Graphics2D;
+import java.awt.geom.Ellipse2D;
+
+public class AlgoVisHelper {
+
+    private AlgoVisHelper(){}
+
+    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);
+    }
+
+    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);
+    }
+
+    public static void setColor(Graphics2D g, Color color){
+        g.setColor(color);
+    }
+
+    public static void setStrokeWidth(Graphics2D g, int w){
+        int strokeWidth = w;
+        g.setStroke(new BasicStroke(strokeWidth, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND));
+    }
+}

02-Java-Swing-Basics/06-Advanced-Rendering/src/Main.java

@@ -0,0 +1,12 @@
+import java.awt.*;
+import javax.swing.*;
+
+public class Main {
+
+    public static void main(String[] args) {
+
+        EventQueue.invokeLater(() -> {
+            AlgoFrame frame = new AlgoFrame("Welcome",500,500);
+        });
+    }
+}