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POWhere should I start drawing? (Java,GUI)
 

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  1. POWhere should I start drawing? (Java,GUI)
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    <p>I have the points by the end of the GenerateButton class but now that I got my public double[][] matrix with all the points in, where do I begin drawing them???</p> <p>my Main.java:</p> <pre><code>import java.awt.*; import javax.swing.*; public class Main { public static Display display = new Display(); public static void main(String[] args) { display.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); display.setVisible(true); } } </code></pre> <p>my Display.java:</p> <pre><code>import java.awt.*; import java.awt.event.*; import java.awt.dnd.*; import java.util.Vector; import javax.swing.*; public class Display extends JFrame { final int FRAME_WIDTH = 910; final int FRAME_HEIGHT = 660; final int X_OFFSET = 40; final int Y_OFFSET = 40; final int GRAPH_OFFSETX = 15; final int GRAPH_OFFSETY = 40; final int GRAPH_WIDTH = 500; final int GRAPH_HEIGHT = 500; final int GRAPH_INTERVAL = 20; JButton submit; JTextField numPoint; JPanel bpanel; JPanel points; Vector&lt;JTextField&gt; pointsA = new Vector&lt;JTextField&gt;(); int maxPoints; public double[][] matrix; public Display() { init(); } public void init() { setBackground(Color.WHITE); setLocation(X_OFFSET, Y_OFFSET); setSize(FRAME_WIDTH, FRAME_HEIGHT); setTitle("Geometric Transformations"); getContentPane().setLayout(null); setDefaultLookAndFeelDecorated(true); numPoint = new JTextField(); numPoint.setText("# Points?"); numPoint.setBounds(530,200,120+20,25); SubmitButton submit = new SubmitButton("Submit"); submit.setBounds(530+150, 200, 100, 25); GenerateButton submitC = new GenerateButton("Generate"); submitC.setBounds(530-5, 200+130, 100, 25); points = new JPanel(new GridLayout(2,2)); points.setBounds(530, 200+40,100+270,80); this.add(numPoint); this.add(submit); this.add(submitC); this.add(points, BorderLayout.LINE_START); repaint(); } public void paint(Graphics g) { super.paint(g); g.setColor(Color.WHITE); g.fillRect(100, 100, 20, 30); g.setColor(Color.BLACK); genGraph(g, GRAPH_OFFSETX, GRAPH_OFFSETY, GRAPH_WIDTH, GRAPH_HEIGHT, GRAPH_INTERVAL); } public void genGraph (Graphics g, int x, int y, int width, int height, int interval) { // draw background int border = 5; g.setColor(Color.BLACK); width = width - (width % interval); height = height - (height % interval); for (int col=x; col &lt;= x+width; col+=interval) { g.drawLine(col, y, col, y+height); } for (int row=y; row &lt;= y+height; row+=interval) { g.drawLine(x, row, x+width, row); } } class SubmitButton extends JButton implements ActionListener { public SubmitButton(String title){ super(title); addActionListener(this); } public void actionPerformed (ActionEvent e) { maxPoints = Integer.parseInt(numPoint.getText()) * 2; points.removeAll(); // clear JPanel so results from last aren't appended to // delete this line and first enter 2 then 10 for # points for (int i=0; i&lt;maxPoints; i++) { JTextField textField = new JTextField(); points.add(textField); // add to JPanel that gets displayed pointsA.add(textField); // for getting values from later } matrix = new double[2][pointsA.size()/2]; // setting up dimension of matrix double[][] points.validate(); points.repaint(); // What to Check: // Things between commas are either spaces (which will be stripped later) // or numbers! // Pairs must match up! } } class GenerateButton extends JButton implements ActionListener { public GenerateButton (String title) { super(title); addActionListener(this); } public void actionPerformed (ActionEvent e) { int c=0; for (int i=0; i&lt;pointsA.size()/2; i++) { JTextField pointTF = pointsA.get(i); Double point = Double.parseDouble(pointTF.getText()); matrix[0][c] = point; c++; } c=0; for (int i=pointsA.size()/2; i&lt;pointsA.size(); i++) { JTextField pointTF = pointsA.get(i); Double point = Double.parseDouble(pointTF.getText()); matrix[1][c] = point; c++; } for (int i=0; i&lt;matrix.length; i++) { for (int j=0; j&lt;matrix[0].length; j++) { System.out.println("i:"+i+"\t"+"j:"+j); System.out.println(" "+matrix[i][j]); } } } } } </code></pre>
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