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40
41 package java2d.demos.Arcs_Curves;
42
43 import static java.awt.Color  .*;
44 import java.awt.*;
45 import java.awt.event.*;
46 import java.awt.image.BufferedImage ;
47 import java.awt.geom.GeneralPath ;
48 import javax.swing.*;
49 import java2d.AnimatingControlsSurface;
50 import java2d.CustomControls;
51
52
53
56 public class BezierAnim extends AnimatingControlsSurface {
57
58 private static final int NUMPTS = 6;
59 protected BasicStroke solid = new BasicStroke(10.0f,
60 BasicStroke.CAP_BUTT, BasicStroke.JOIN_ROUND);
61 protected BasicStroke dashed = new BasicStroke(10.0f,
62 BasicStroke.CAP_BUTT, BasicStroke.JOIN_ROUND, 10, new float[] {5}, 0);
63 private float animpts[] = new float[NUMPTS * 2];
64 private float deltas[] = new float[NUMPTS * 2];
65 protected Paint fillPaint, drawPaint;
66 protected boolean doFill = true;
67 protected boolean doDraw = true;
68 protected GradientPaint gradient;
69 protected BasicStroke stroke;
70
71
72 public BezierAnim() {
73 setBackground(WHITE);
74 gradient = new GradientPaint(0,0,RED,200,200,YELLOW);
75 fillPaint = gradient;
76 drawPaint = BLUE;
77 stroke = solid;
78 setControls(new Component[] { new DemoControls(this) });
79 }
80
81
82 public void animate(float[] pts, float[] deltas, int index, int limit) {
83 float newpt = pts[index] + deltas[index];
84 if (newpt <= 0) {
85 newpt = -newpt;
86 deltas[index] = (float) (Math.random() * 4.0 + 2.0);
87 } else if (newpt >= (float) limit) {
88 newpt = 2.0f * limit - newpt;
89 deltas[index] = - (float) (Math.random() * 4.0 + 2.0);
90 }
91 pts[index] = newpt;
92 }
93
94
95 public void reset(int w, int h) {
96 for (int i = 0; i < animpts.length; i += 2) {
97 animpts[i + 0] = (float) (Math.random() * w);
98 animpts[i + 1] = (float) (Math.random() * h);
99 deltas[i + 0] = (float) (Math.random() * 6.0 + 4.0);
100 deltas[i + 1] = (float) (Math.random() * 6.0 + 4.0);
101 if (animpts[i + 0] > w / 2.0f) {
102 deltas[i + 0] = -deltas[i + 0];
103 }
104 if (animpts[i + 1] > h / 2.0f) {
105 deltas[i + 1] = -deltas[i + 1];
106 }
107 }
108 gradient = new GradientPaint(0,0,RED,w*.7f,h*.7f,YELLOW);
109 }
110
111
112 public void step(int w, int h) {
113 for (int i = 0; i < animpts.length; i += 2) {
114 animate(animpts, deltas, i + 0, w);
115 animate(animpts, deltas, i + 1, h);
116 }
117 }
118
119
120 public void render(int w, int h, Graphics2D g2) {
121 float[] ctrlpts = animpts;
122 int len = ctrlpts.length;
123 float prevx = ctrlpts[len - 2];
124 float prevy = ctrlpts[len - 1];
125 float curx = ctrlpts[0];
126 float cury = ctrlpts[1];
127 float midx = (curx + prevx) / 2.0f;
128 float midy = (cury + prevy) / 2.0f;
129 GeneralPath gp = new GeneralPath (GeneralPath.WIND_NON_ZERO);
130 gp.moveTo(midx, midy);
131 for (int i = 2; i <= ctrlpts.length; i += 2) {
132 float x1 = (midx + curx) / 2.0f;
133 float y1 = (midy + cury) / 2.0f;
134 prevx = curx;
135 prevy = cury;
136 if (i < ctrlpts.length) {
137 curx = ctrlpts[i + 0];
138 cury = ctrlpts[i + 1];
139 } else {
140 curx = ctrlpts[0];
141 cury = ctrlpts[1];
142 }
143 midx = (curx + prevx) / 2.0f;
144 midy = (cury + prevy) / 2.0f;
145 float x2 = (prevx + midx) / 2.0f;
146 float y2 = (prevy + midy) / 2.0f;
147 gp.curveTo(x1, y1, x2, y2, midx, midy);
148 }
149 gp.closePath();
150 if (doDraw) {
151 g2.setPaint(drawPaint);
152 g2.setStroke(stroke);
153 g2.draw(gp);
154 }
155 if (doFill) {
156 if (fillPaint instanceof GradientPaint) {
157 fillPaint = gradient;
158 }
159 g2.setPaint(fillPaint);
160 g2.fill(gp);
161 }
162 }
163
164
165 public static void main(String argv[]) {
166 createDemoFrame(new BezierAnim());
167 }
168
169
170 static class DemoControls extends CustomControls implements ActionListener {
171 static TexturePaint tp1, tp2;
172 static {
173 BufferedImage bi = new BufferedImage (2,1,BufferedImage.TYPE_INT_RGB);
174 bi.setRGB(0, 0, 0xff00ff00); bi.setRGB(1, 0, 0xffff0000);
175 tp1 = new TexturePaint(bi,new Rectangle(0,0,2,1));
176 bi = new BufferedImage (2,1,BufferedImage.TYPE_INT_RGB);
177 bi.setRGB(0, 0, 0xff0000ff); bi.setRGB(1, 0, 0xffff0000);
178 tp2 = new TexturePaint(bi,new Rectangle(0,0,2,1));
179 }
180
181 BezierAnim demo;
182 static Paint drawPaints[] =
183 {new Color (0,0,0,0), BLUE, new Color (0, 0, 255, 126),
184 BLUE, tp2 };
185 static String drawName[] =
186 {"No Draw", "Blue", "Blue w/ Alpha", "Blue Dash", "Texture" };
187 static Paint fillPaints[] =
188 {new Color (0,0,0,0), GREEN, new Color (0, 255, 0, 126),
189 tp1, new GradientPaint(0,0,RED,30,30,YELLOW) };
190 String fillName[] =
191 {"No Fill", "Green", "Green w/ Alpha", "Texture", "Gradient"};
192
193 JMenu fillMenu, drawMenu;
194 JMenuItem fillMI[] = new JMenuItem[fillPaints.length];
195 JMenuItem drawMI[] = new JMenuItem[drawPaints.length];
196 PaintedIcon fillIcons[] = new PaintedIcon[fillPaints.length];
197 PaintedIcon drawIcons[] = new PaintedIcon[drawPaints.length];
198 Font font = new Font("serif", Font.PLAIN, 10);
199
200
201 public DemoControls(BezierAnim demo) {
202 super(demo.name);
203 this.demo = demo;
204
205 JMenuBar drawMenuBar = new JMenuBar();
206 add(drawMenuBar);
207
208 JMenuBar fillMenuBar = new JMenuBar();
209 add(fillMenuBar);
210
211 drawMenu = (JMenu) drawMenuBar.add(new JMenu("Draw Choice"));
212 drawMenu.setFont(font);
213
214 for (int i = 0; i < drawPaints.length; i++) {
215 drawIcons[i]= new PaintedIcon(drawPaints[i]);
216 drawMI[i] = drawMenu.add(new JMenuItem(drawName[i]));
217 drawMI[i].setFont(font);
218 drawMI[i].setIcon(drawIcons[i]);
219 drawMI[i].addActionListener(this);
220 }
221 drawMenu.setIcon(drawIcons[1]);
222
223 fillMenu = (JMenu) fillMenuBar.add(new JMenu("Fill Choice"));
224 fillMenu.setFont(font);
225 for (int i = 0; i < fillPaints.length; i++) {
226 fillIcons[i]= new PaintedIcon(fillPaints[i]);
227 fillMI[i] = fillMenu.add(new JMenuItem(fillName[i]));
228 fillMI[i].setFont(font);
229 fillMI[i].setIcon(fillIcons[i]);
230 fillMI[i].addActionListener(this);
231 }
232 fillMenu.setIcon(fillIcons[fillPaints.length-1]);
233 }
234
235
236 public void actionPerformed(ActionEvent e) {
237 Object obj = e.getSource();
238 for (int i = 0; i < fillPaints.length; i++) {
239 if (obj.equals(fillMI[i])) {
240 demo.doFill = true;
241 demo.fillPaint = fillPaints[i];
242 fillMenu.setIcon(fillIcons[i]);
243 break;
244 }
245 }
246 for (int i = 0; i < drawPaints.length; i++) {
247 if (obj.equals(drawMI[i])) {
248 demo.doDraw = true;
249 demo.drawPaint = drawPaints[i];
250 if (((JMenuItem) obj).getText().endsWith("Dash")) {
251 demo.stroke = demo.dashed;
252 } else {
253 demo.stroke = demo.solid;
254 }
255 drawMenu.setIcon(drawIcons[i]);
256 break;
257 }
258 }
259 if (obj.equals(fillMI[0])) {
260 demo.doFill = false;
261 } else if (obj.equals(drawMI[0])) {
262 demo.doDraw = false;
263 }
264 if (demo.animating.thread == null) {
265 demo.repaint();
266 }
267 }
268
269
270 public Dimension getPreferredSize() {
271 return new Dimension(200,36);
272 }
273
274
275 public void run() {
276 Thread me = Thread.currentThread();
277 while (thread == me) {
278 for (JMenuItem dmi : drawMI) {
279 dmi.doClick();
280 for (JMenuItem fmi : fillMI) {
281 fmi.doClick();
282 try {
283 thread.sleep(3000 + (long) (Math.random() * 3000));
284 } catch (InterruptedException e) { break; }
285 }
286 }
287 }
288 thread = null;
289 }
290
291
292 static class PaintedIcon implements Icon {
293 Paint paint;
294 public PaintedIcon(Paint p) {
295 this.paint = p;
296 }
297
298 public void paintIcon(Component c, Graphics g, int x, int y) {
299 Graphics2D g2 = (Graphics2D) g;
300 g2.setPaint(paint);
301 g2.fillRect(x,y,getIconWidth(), getIconHeight());
302 g2.setColor(GRAY);
303 g2.draw3DRect(x, y, getIconWidth()-1, getIconHeight()-1, true);
304 }
305 public int getIconWidth() { return 12; }
306 public int getIconHeight() { return 12; }
307 } } } |
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