StackOverflow2013

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2013-02-22T13:00:27.347
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I'm sorry to answer my own post, but I changed the program completely. I do not know if I can remove the code from the first post. So I put in a new post. I changed a application but still have a problem with entering the array to another method. Copy arrays by "Arrays.copyOf b = (a, a.length)" and changing the array as static does not fix a problem. I can't enter array from setSignal() to getSignal() in OscilloscopeController class. OscilloscopeController.java <pre><code>import java.util.Arrays; import java.util.Random; public class OscilloscopeController { private static int frameSize = (int) (44100 / 100F); private int idx, numFramesToSkip = 10; private static int[] toDraw = new int[frameSize]; private static int[] data = new int[frameSize]; public OscilloscopeController() { for (int i = 0; i < frameSize; i++) { toDraw[i] = 0; data[i] = 0; } } public void setSignal(int in) { // Because the Model layer is off, I generate a test signal Random randomGenerator = new Random(); int j = 0; for (int i = 0; i < 44100; i++) { int randomInt = randomGenerator.nextInt(32675 * 2) - (32675); if (i % 4 == 0) { j = randomInt; } in = j; } if (idx++ > frameSize * numFramesToSkip) { idx = 0; } else { if (idx < frameSize) { data[idx] = in; } if (idx == frameSize) { // HERE IS PROBLEM. I'D LIKE THIS toDraw in getSignal() toDraw = Arrays.copyOf(data, data.length); } } } public int[] getSignal() { // IF UNCOMMENT BELOW WORKS FINE, OTHERWISE ZERO VALUES /* Random randomGenerator = new Random(); int j=0; for (int i = 0; i < 440; i++) { int randomInt = randomGenerator.nextInt(32675*2)-(32675); if (i%4==0) j = randomInt; toDraw[i]=j; } */ for (int i = 0; i < frameSize; i++) System.out.println("Controller.getSignal() = "+ toDraw[i]); return toDraw; } } </code></pre> MainPanel contains main method: <pre><code>import java.awt.*; import javax.swing.*; public class MainPanel extends JPanel { public static void main(String args[]) throws Exception { SwingUtilities.invokeLater(new Runnable() { public void run() { JFrame frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.getContentPane().add(new MainPanel()); frame.pack(); frame.setVisible(true); } }); } private final OscilloscopeView oscView = new OscilloscopeView(); private final OscilloscopeController oscController = new OscilloscopeController(); public MainPanel() { setPreferredSize(new Dimension(400, 200)); // a lot of other components here oscView.setData(oscController.getSignal()); add(oscView); } } </code></pre> OscilloscopeView.java <pre><code>import javax.swing.JFrame; import javax.swing.JPanel; public class OscilloscopeView extends JPanel { private OscPlotter plotter = new OscPlotter(441);; public OscilloscopeView() { setSize(320,210); add(this.plotter); } public void setData(int[] data){ plotter.setData(data); } } </code></pre> OscPlotter.java <pre><code>import java.awt.Color; import java.awt.Graphics; import java.util.Arrays; import javax.swing.JPanel; public class OscPlotter extends JPanel{ private int width = 320; private int height = 130; private float widthC; private float heightC; private int sampleSize; private int frameSize; private int[] toDraw; private float x,prevX; public OscPlotter(int fSize){ setSize(width,height); setPreferredSize(this.getSize()); this.frameSize = fSize; this.toDraw = new int[441]; sampleSize = 1; } public void setData(int[] data){ toDraw = Arrays.copyOf(data, data.length); repaint(); } @Override public void paintComponent(Graphics g){ widthC = ((float)width/frameSize); sampleSize = (16 == 16 ? 65536 : 256); heightC = (((float)height-15)/sampleSize); g.setColor(Color.black); g.fillRect(0,0,width,height); g.setColor(Color.gray); for (int i = 1; i<height;i+=height/8) g.drawLine(0,i,width,i); for (int i = 1; i<width;i+=width/8) g.drawLine(i,0,i,height); g.setColor(Color.lightGray); g.drawLine(0,(int)(height/2),width,(int)((height/2))); g.setColor(Color.green); x = 0; for (int i = 0; i< frameSize-1;i++) { prevX = x; x +=widthC; // draw the read waveform data g.drawLine ((int)prevX,(int)((height/2+toDraw[i]*heightC)),(int)x,(int)((height/2+toDraw[i+1]*heightC))); } } } </code></pre>
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