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example.swing.Ball.Ball(DrawingPanel)   A
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↳ Parent: example.swing.Ball

Complexity

Conditions 1

Size

Total Lines 13

Duplication

Lines 0
Ratio 0 %

Importance

Changes 1
Bugs 0 Features 0
Metric Value
cc 1
c 1
b 0
f 0
dl 0
loc 13
rs 9.75
1 
package example.swing;
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import org.gannacademy.cdf.graphics.geom.Ellipse;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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import org.gannacademy.cdf.graphics.ui.DrawingPanel;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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import java.awt.*;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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public class Ball {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    private Ellipse ball;

            


                            

                    
                        
                    
                    
                    
                    
                                                                                                    
                        

                            
                            
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A field should not duplicate the name of its containing class. While technically legal, this practice may be confusing.
                                                                                                

                    
                                                    

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    private double dx, dy;

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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    public Ball(DrawingPanel panel) {

            


            
                                                                        
                            
            
                                    
            
            

                
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        double heading = Math.random() * Math.PI * 2;

            


            
                                                                        
                            
            
                                    
            
            

                
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        dx = Math.cos(heading);

            


            
                                                                        
                            
            
                                    
            
            

                
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        dy = Math.sin(heading);

            


            
                                                                        
                            
            
                                    
            
            

                
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        ball = new Ellipse(

            


            
                                                                        
                            
            
                                    
            
            

                
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                Math.random() * panel.getWidth(),

            


            
                                                                        
                            
            
                                    
            
            

                
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                Math.random() * panel.getHeight(),

            


            
                                                                        
                            
            
                                    
            
            

                
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                20, 20,

            


            
                                                                        
                            
            
                                    
            
            

                
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                panel

            


            
                                                                        
                            
            
                                    
            
            

                
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        );

            


            
                                                                        
                            
            
                                    
            
            

                
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        ball.setFillColor(new Color((float) Math.random(), (float) Math.random(), (float) Math.random()));

            


            
                                                                        
                            
            
                                    
            
            

                
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        ball.setStrokeColor(ball.getFillColor());

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    }

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    public void move() {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        ball.translate(dx, dy);

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        if (ball.getX() < 0 || ball.getX() + ball.getWidth() > ball.getDrawingPanel().getWidth()) {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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            dx = -dx;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        }

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        if (ball.getY() < 0 || ball.getY() + ball.getWidth() > ball.getDrawingPanel().getHeight()) {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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            dy = -dy;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        }

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    }

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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}

            


            
                                                        
            
                                    
            
            

                
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