http://www.jexp.ru/index.php?action=history&feed=atom&title=Java_Tutorial%2FSWT_2D_Graphics%2FSine 2026-04-21T20:14:08Z История изменений этой страницы в вики MediaWiki 1.30.0 http://www.jexp.ru/index.php?title=Java_Tutorial/SWT_2D_Graphics/Sine&diff=2821&oldid=prev 2010-05-31T17:44:26Z

<p></p> <table class="diff diff-contentalign-left" data-mw="interface"> <tr style="vertical-align: top;" lang="ru"> <td colspan="1" style="background-color: white; color:black; text-align: center;">← Предыдущая</td> <td colspan="1" style="background-color: white; color:black; text-align: center;">Версия 17:44, 31 мая 2010</td> </tr><tr><td colspan="2" style="text-align: center;" lang="ru"><div class="mw-diff-empty">(нет различий)</div> </td></tr></table>

http://www.jexp.ru/index.php?title=Java_Tutorial/SWT_2D_Graphics/Sine&diff=2822&oldid=prev 2010-05-31T15:18:17Z

<p>1 версия</p> <p><b>Новая страница</b></p><div>== Plotting the sine function: Use the drawPoint() method to plot points ==<br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> &lt;!-- start source code --&gt;<br /> <br /> &lt;source lang=&quot;java&quot;&gt;<br /> import org.eclipse.swt.SWT;<br /> import org.eclipse.swt.events.PaintEvent;<br /> import org.eclipse.swt.events.PaintListener;<br /> import org.eclipse.swt.layout.FillLayout;<br /> import org.eclipse.swt.widgets.Canvas;<br /> import org.eclipse.swt.widgets.Display;<br /> import org.eclipse.swt.widgets.Shell;<br /> public class SineFunctionPlotting {<br /> public static void main(String[] args) {<br /> Display display = new Display();<br /> Shell shell = new Shell(display);<br /> shell.setText(&quot;Canvas Example&quot;);<br /> shell.setLayout(new FillLayout());<br /> Canvas canvas = new Canvas(shell, SWT.NONE);<br /> canvas.addPaintListener(new PaintListener() {<br /> public void paintControl(PaintEvent e) {<br /> Canvas canvas = (Canvas) e.widget;<br /> int maxX = canvas.getSize().x;<br /> int maxY = canvas.getSize().y;<br /> // Calculate the middle<br /> int halfX = (int) maxX / 2;<br /> int halfY = (int) maxY / 2;<br /> // Set the line color and draw a horizontal axis<br /> e.gc.setForeground(e.display.getSystemColor(SWT.COLOR_BLACK));<br /> e.gc.drawLine(0, halfY, maxX, halfY);<br /> // Draw the sine wave<br /> for (int i = 0; i &lt; maxX; i++) {<br /> e.gc.drawPoint(i, getNormalizedSine(i, halfY, maxX));<br /> }<br /> }<br /> });<br /> shell.open();<br /> while (!shell.isDisposed()) {<br /> if (!display.readAndDispatch()) {<br /> display.sleep();<br /> }<br /> }<br /> display.dispose();<br /> }<br /> static int getNormalizedSine(int x, int halfY, int maxX) {<br /> double piDouble = 2 * Math.PI;<br /> double factor = piDouble / maxX;<br /> return (int) (Math.sin(x * factor) * halfY + halfY);<br /> }<br /> }&lt;/source&gt;<br /> <br /> <br /> &lt;!-- end source code --&gt;</div>

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