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41 package java2d.demos.Transforms;
42
43 import static java.awt.Color  .*;
44 import java.awt.*;
45 import java.awt.event.*;
46 import java.awt.geom.Ellipse2D ;
47 import java.awt.geom.AffineTransform ;
48 import javax.swing.*;
49 import java2d.ControlsSurface;
50 import java2d.CustomControls;
51
52
53
57 public class Rotate extends ControlsSurface {
58
59
60 protected double increment = 5.0;
61 protected int emphasis = 9;
62
63
64 public Rotate() {
65 setBackground(WHITE);
66 setControls(new Component[] { new DemoControls(this) });
67 }
68
69
70 public void render(int w, int h, Graphics2D g2) {
71 int size = Math.min(w, h);
72 float ew = size/4;
73 float eh = size-20;
74 Ellipse2D ellipse = new Ellipse2D.Float (-ew/2, -eh/2, ew, eh);
75 for (double angdeg = 0; angdeg < 360; angdeg+=increment) {
76 if (angdeg % emphasis == 0) {
77 g2.setColor(GRAY);
78 g2.setStroke(new BasicStroke(2.0f));
79 } else {
80 g2.setColor(LIGHT_GRAY);
81 g2.setStroke(new BasicStroke(0.5f));
82 }
83 AffineTransform at = AffineTransform.getTranslateInstance(w/2, h/2);
84 at.rotate(Math.toRadians(angdeg));
85 g2.draw(at.createTransformedShape(ellipse));
86 }
87 g2.setColor(BLUE);
88 ellipse.setFrame(w/2-10,h/2-10,20,20);
89 g2.fill(ellipse);
90 g2.setColor(GRAY);
91 g2.setStroke(new BasicStroke(6));
92 g2.draw(ellipse);
93 g2.setColor(YELLOW);
94 g2.setStroke(new BasicStroke(4));
95 g2.draw(ellipse);
96 g2.setColor(BLACK);
97 g2.drawString("Rotate", 5, 15);
98 }
99
100
101 public static void main(String s[]) {
102 createDemoFrame(new Rotate());
103 }
104
105
106 static class DemoControls extends CustomControls implements ActionListener {
107
108 Rotate demo;
109 JTextField tf1, tf2;
110
111 public DemoControls(Rotate demo) {
112 super(demo.name);
113 this.demo = demo;
114 JLabel l = new JLabel("Increment:");
115 l.setForeground(BLACK);
116 add(l);
117 add(tf1 = new JTextField("5.0"));
118 tf1.setPreferredSize(new Dimension(30,24));
119 tf1.addActionListener(this);
120 add(l = new JLabel(" Emphasis:"));
121 l.setForeground(BLACK);
122 add(tf2 = new JTextField("9"));
123 tf2.setPreferredSize(new Dimension(30,24));
124 tf2.addActionListener(this);
125 }
126
127
128 public void actionPerformed(ActionEvent e) {
129 try {
130 if (e.getSource().equals(tf1)) {
131 demo.increment = Double.parseDouble(tf1.getText().trim());
132 if (demo.increment < 1.0) {
133 demo.increment = 1.0;
134 }
135 } else {
136 demo.emphasis = Integer.parseInt(tf2.getText().trim());
137 }
138 demo.repaint();
139 } catch (Exception ex) {}
140 }
141
142 public Dimension getPreferredSize() {
143 return new Dimension(200,39);
144 }
145
146 public void run() {
147 Thread me = Thread.currentThread();
148 while (thread == me) {
149 for (int i = 3; i < 13; i+=3) {
150 try {
151 thread.sleep(4444);
152 } catch (InterruptedException e) { return; }
153 tf1.setText(String.valueOf(i));
154 demo.increment = i;
155 demo.repaint();
156 }
157 }
158 thread = null;
159 }
160 } } |
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