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Java Tutorial/SWT 2D Graphics/Animation - История изменений
2026-04-21T18:45:11Z
История изменений этой страницы в вики
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http://www.jexp.ru/index.php?title=Java_Tutorial/SWT_2D_Graphics/Animation&diff=2797&oldid=prev
в 17:44, 31 мая 2010
2010-05-31T17:44:26Z
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Admin: 1 версия
2010-05-31T15:18:10Z
<p>1 версия</p>
<p><b>Новая страница</b></p><div>== Animate a bouncing ball with Double Buffering ==<br />
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<!-- start source code --><br />
<br />
<source lang="java"><br />
import org.eclipse.swt.SWT;<br />
import org.eclipse.swt.events.*;<br />
import org.eclipse.swt.graphics.*;<br />
import org.eclipse.swt.layout.*;<br />
import org.eclipse.swt.widgets.*;<br />
public class AnimationDoubleBuffering {<br />
private static final int IMAGE_WIDTH = 100;<br />
private static final int TIMER_INTERVAL = 10;<br />
private static int x = 0;<br />
private static int y = 0;<br />
private static int directionX = 1;<br />
private static int directionY = 1;<br />
private static Canvas canvas;<br />
public static void animate() {<br />
x += directionX;<br />
y += directionY;<br />
// Determine out of bounds<br />
Rectangle rect = canvas.getClientArea();<br />
if (x < 0) {<br />
x = 0;<br />
directionX = 1;<br />
} else if (x > rect.width - IMAGE_WIDTH) {<br />
x = rect.width - IMAGE_WIDTH;<br />
directionX = -1;<br />
}<br />
if (y < 0) {<br />
y = 0;<br />
directionY = 1;<br />
} else if (y > rect.height - IMAGE_WIDTH) {<br />
y = rect.height - IMAGE_WIDTH;<br />
directionY = -1;<br />
}<br />
// Force a redraw<br />
canvas.redraw();<br />
}<br />
public static void main(String[] args) {<br />
final Display display = new Display();<br />
final Shell shell = new Shell(display);<br />
shell.setText("Animator");<br />
shell.setLayout(new FillLayout());<br />
canvas = new Canvas(shell, SWT.NO_BACKGROUND);<br />
canvas.addPaintListener(new PaintListener() {<br />
public void paintControl(PaintEvent event) {<br />
// Create the image to fill the canvas<br />
Image image = new Image(shell.getDisplay(), canvas.getBounds());<br />
// Set up the offscreen gc<br />
GC gcImage = new GC(image);<br />
gcImage.setBackground(event.gc.getBackground());<br />
gcImage.fillRectangle(image.getBounds());<br />
gcImage.setBackground(shell.getDisplay().getSystemColor(SWT.COLOR_RED));<br />
gcImage.fillOval(x, y, IMAGE_WIDTH, IMAGE_WIDTH);<br />
// Draw the offscreen buffer to the screen<br />
event.gc.drawImage(image, 0, 0);<br />
image.dispose();<br />
gcImage.dispose();<br />
}<br />
});<br />
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shell.open();<br />
Runnable runnable = new Runnable() {<br />
public void run() {<br />
animate();<br />
display.timerExec(TIMER_INTERVAL, this);<br />
}<br />
};<br />
display.timerExec(TIMER_INTERVAL, runnable);<br />
while (!shell.isDisposed()) {<br />
if (!display.readAndDispatch()) {<br />
display.sleep();<br />
}<br />
}<br />
// Kill the timer<br />
display.timerExec(-1, runnable);<br />
display.dispose();<br />
}<br />
}</source><br />
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<!-- end source code --><br />
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== Animation a bounce ball with flicker ==<br />
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<!-- start source code --><br />
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<source lang="java"><br />
import org.eclipse.swt.SWT;<br />
import org.eclipse.swt.events.*;<br />
import org.eclipse.swt.graphics.*;<br />
import org.eclipse.swt.layout.*;<br />
import org.eclipse.swt.widgets.*;<br />
public class AnimationBounce {<br />
private static final int IMAGE_WIDTH = 100;<br />
private static final int TIMER_INTERVAL = 10;<br />
private static int x = 0;<br />
private static int y = 0;<br />
private static int directionX = 1;<br />
private static int directionY = 1;<br />
private static Canvas canvas;<br />
public static void animate() {<br />
x += directionX;<br />
y += directionY;<br />
// Determine out of bounds<br />
Rectangle rect = canvas.getClientArea();<br />
if (x < 0) {<br />
x = 0;<br />
directionX = 1;<br />
} else if (x > rect.width - IMAGE_WIDTH) {<br />
x = rect.width - IMAGE_WIDTH;<br />
directionX = -1;<br />
}<br />
if (y < 0) {<br />
y = 0;<br />
directionY = 1;<br />
} else if (y > rect.height - IMAGE_WIDTH) {<br />
y = rect.height - IMAGE_WIDTH;<br />
directionY = -1;<br />
}<br />
// Force a redraw<br />
canvas.redraw();<br />
}<br />
public static void main(String[] args) {<br />
final Display display = new Display();<br />
final Shell shell = new Shell(display);<br />
shell.setText("Animator");<br />
shell.setLayout(new FillLayout());<br />
canvas = new Canvas(shell, SWT.NO_BACKGROUND);<br />
canvas.addPaintListener(new PaintListener() {<br />
public void paintControl(PaintEvent event) {<br />
// Draw the background<br />
event.gc.fillRectangle(canvas.getBounds());<br />
event.gc.setBackground(shell.getDisplay().getSystemColor(SWT.COLOR_RED));<br />
event.gc.fillOval(x, y, IMAGE_WIDTH, IMAGE_WIDTH);<br />
}<br />
});<br />
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shell.open();<br />
Runnable runnable = new Runnable() {<br />
public void run() {<br />
animate();<br />
display.timerExec(TIMER_INTERVAL, this);<br />
}<br />
};<br />
display.timerExec(TIMER_INTERVAL, runnable);<br />
while (!shell.isDisposed()) {<br />
if (!display.readAndDispatch()) {<br />
display.sleep();<br />
}<br />
}<br />
// Kill the timer<br />
display.timerExec(-1, runnable);<br />
display.dispose();<br />
}<br />
}</source><br />
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<!-- end source code --></div>
Admin