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37
40
41 package java2d.demos.Clipping;
42
43 import java.awt.*;
44 import java.awt.event.*;
45 import java.awt.geom.*;
46 import java.awt.font.FontRenderContext  ;
47 import java.awt.font.TextLayout ;
48 import javax.swing.*;
49 import java2d.AnimatingControlsSurface;
50 import java2d.CustomControls;
51
52 import static java.awt.Color .*;
53
54
55
56
59 public class Intersection extends AnimatingControlsSurface {
60
61 private static final int HEIGHT_DECREASE = 0;
62 private static final int HEIGHT_INCREASE = 1;
63 private static final int WIDTH_DECREASE = 2;
64 private static final int WIDTH_INCREASE = 3;
65
66 private int xx, yy, ww, hh;
67 private int direction = HEIGHT_DECREASE;
68 private int angdeg;
69 private Shape textshape;
70 private double sw, sh;
71 private GeneralPath ovals;
72 private Rectangle2D rectshape;
73 private DemoControls controls;
74 protected boolean doIntersection = true;
75 protected boolean doOvals = true;
76 protected boolean doText;
77 protected boolean threeSixty;
78
79
80 public Intersection() {
81 setBackground(WHITE);
82 setControls(new Component[] { new DemoControls(this) });
83 }
84
85
86 public void reset(int w, int h) {
87 xx = yy = 0;
88 ww = w-1; hh = h;
89 direction = HEIGHT_DECREASE;
90 angdeg = 0;
91 FontRenderContext frc = new FontRenderContext (null, true, false);
92 Font f = new Font("serif",Font.BOLD,32);
93 TextLayout tl = new TextLayout ("J2D", f, frc);
94 sw = tl.getBounds().getWidth();
95 sh = tl.getBounds().getHeight();
96 int size = Math.min(w, h);
97 double sx = (size-40)/sw;
98 double sy = (size-100)/sh;
99 AffineTransform Tx = AffineTransform.getScaleInstance(sx, sy);
100 textshape = tl.getOutline(Tx);
101 rectshape = textshape.getBounds();
102 sw = rectshape.getWidth();
103 sh = rectshape.getHeight();
104 ovals = new GeneralPath();
105 ovals.append(new Ellipse2D.Double( 10, 10, 20, 20), false);
106 ovals.append(new Ellipse2D.Double(w-30, 10, 20, 20), false);
107 ovals.append(new Ellipse2D.Double( 10, h-30, 20, 20), false);
108 ovals.append(new Ellipse2D.Double(w-30, h-30, 20, 20), false);
109 }
110
111
112 public void step(int w, int h) {
113 if (direction == HEIGHT_DECREASE) {
114 yy+=2; hh-=4;
115 if (yy >= h/2) {
116 direction = HEIGHT_INCREASE;
117 }
118 } else if (direction == HEIGHT_INCREASE) {
119 yy-=2; hh+=4;
120 if (yy <= 0) {
121 direction = WIDTH_DECREASE;
122 hh = h-1; yy = 0;
123 }
124 }
125 if (direction == WIDTH_DECREASE) {
126 xx+=2; ww-=4;
127 if (xx >= w/2) {
128 direction = WIDTH_INCREASE;
129 }
130 } else if (direction == WIDTH_INCREASE) {
131 xx-=2; ww+=4;
132 if (xx <= 0) {
133 direction = HEIGHT_DECREASE;
134 ww = w-1; xx = 0;
135 }
136 }
137 if ((angdeg += 5) == 360) {
138 angdeg = 0;
139 threeSixty = true;
140 }
141 }
142
143
144 public void render(int w, int h, Graphics2D g2) {
145
146 Rectangle rect = new Rectangle(xx, yy, ww, hh);
147
148 AffineTransform Tx = new AffineTransform();
149 Tx.rotate(Math.toRadians(angdeg),w/2,h/2);
150 Tx.translate(w/2-sw/2, sh+(h-sh)/2);
151
152 GeneralPath path = new GeneralPath();
153 if (doOvals) {
154 path.append(ovals, false);
155 }
156 if (doText) {
157 path.append(Tx.createTransformedShape(textshape), false);
158 } else {
159 path.append(Tx.createTransformedShape(rectshape), false);
160 }
161
162 if (doIntersection) {
163 g2.clip(rect);
164 g2.clip(path);
165 }
166
167 g2.setColor(GREEN);
168 g2.fill(rect);
169
170 g2.setClip(new Rectangle(0, 0, w, h));
171
172 g2.setColor(LIGHT_GRAY);
173 g2.draw(rect);
174 g2.setColor(BLACK);
175 g2.draw(path);
176 }
177
178
179 public static void main(String argv[]) {
180 createDemoFrame(new Intersection());
181 }
182
183
184 static class DemoControls extends CustomControls implements ActionListener {
185
186 Intersection demo;
187 JToolBar toolbar;
188
189 public DemoControls(Intersection demo) {
190 super(demo.name);
191 this.demo = demo;
192 add(toolbar = new JToolBar());
193 toolbar.setFloatable(false);
194 addTool("Intersect", true );
195 addTool("Text", false);
196 addTool("Ovals", true );
197 }
198
199
200 public void addTool(String str, boolean state) {
201 JToggleButton b = (JToggleButton) toolbar.add(new JToggleButton(str));
202 b.setFocusPainted(false);
203 b.setSelected(state);
204 b.addActionListener(this);
205 int width = b.getPreferredSize().width;
206 Dimension prefSize = new Dimension(width, 21);
207 b.setPreferredSize(prefSize);
208 b.setMaximumSize( prefSize);
209 b.setMinimumSize( prefSize);
210 }
211
212
213 public void actionPerformed(ActionEvent e) {
214 JToggleButton b = (JToggleButton) e.getSource();
215 if (b.getText().equals("Intersect")) {
216 demo.doIntersection = b.isSelected();
217 } else if (b.getText().equals("Ovals")) {
218 demo.doOvals = b.isSelected();
219 } else if (b.getText().equals("Text")) {
220 demo.doText = b.isSelected();
221 }
222 if (demo.animating.thread == null) {
223 demo.repaint();
224 }
225 }
226
227 public Dimension getPreferredSize() {
228 return new Dimension(200,40);
229 }
230
231
232 public void run() {
233 Thread me = Thread.currentThread();
234 while (thread == me) {
235 if (demo.threeSixty) {
236 ((AbstractButton) toolbar.getComponentAtIndex(1)).doClick();
237 demo.threeSixty = false;
238 }
239 try {
240 thread.sleep(500);
241 } catch (InterruptedException e) { return; }
242 }
243 thread = null;
244 }
245 } } |
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