|
import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class SlideShow extends JComponent {
private BufferedImage[] slide;
private Dimension slideSize;
private volatile int currSlide;
private Thread internalThread;
private volatile boolean noStopRequested;
public SlideShow() {
currSlide = 0;
slideSize = new Dimension(50, 50);
buildSlides();
setMinimumSize(slideSize);
setPreferredSize(slideSize);
setMaximumSize(slideSize);
setSize(slideSize);
noStopRequested = true;
Runnable r = new Runnable() {
public void run() {
try {
runWork();
} catch (Exception x) {
x.printStackTrace();
}
}
};
internalThread = new Thread(r, "SlideShow");
internalThread.start();
}
private void buildSlides() {
RenderingHints renderHints = new RenderingHints(
RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
renderHints.put(RenderingHints.KEY_RENDERING,
RenderingHints.VALUE_RENDER_QUALITY);
slide = new BufferedImage[20];
Color rectColor = Color.BLUE;
Color circleColor = Color.YELLOW;
for (int i = 0; i < slide.length; i++) {
slide[i] = new BufferedImage(slideSize.width, slideSize.height,
BufferedImage.TYPE_INT_RGB);
Graphics2D g2 = slide[i].createGraphics();
g2.setRenderingHints(renderHints);
g2.setColor(rectColor);
g2.fillRect(0, 0, slideSize.width, slideSize.height);
g2.setColor(circleColor);
int diameter = 0;
if (i < (slide.length / 2)) {
diameter = 5 + (8 * i);
} else {
diameter = 5 + (8 * (slide.length - i));
}
int inset = (slideSize.width - diameter) / 2;
g2.fillOval(inset, inset, diameter, diameter);
g2.setColor(Color.black);
g2.drawRect(0, 0, slideSize.width - 1, slideSize.height - 1);
g2.dispose();
}
}
public void paint(Graphics g) {
g.drawImage(slide[currSlide], 0, 0, this);
}
private void runWork() {
while (noStopRequested) {
try {
Thread.sleep(100); // 10 frames per second
currSlide = (currSlide + 1) % slide.length;
repaint();
} catch (InterruptedException x) {
Thread.currentThread().interrupt();
}
}
}
public void stopRequest() {
noStopRequested = false;
internalThread.interrupt();
}
public boolean isAlive() {
return internalThread.isAlive();
}
public static void main(String[] args) {
SlideShow ss = new SlideShow();
JPanel p = new JPanel(new FlowLayout());
p.add(ss);
JFrame f = new JFrame("SlideShow");
f.setContentPane(p);
f.setSize(250, 150);
f.setVisible(true);
}
}
|
