// LineChart.java
// Draw co-ordinates as a line graph ... can also take mouse click contributions
// RJM Programming
// November, 2014


import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.geom.*;
import java.util.ArrayList; 
import java.awt.event.MouseListener;
import java.awt.event.MouseEvent;

class LineChart extends JPanel implements ActionListener, MouseListener {

    private final Timer timer = new Timer(20, this);  // Create a timer that will go off every 20 ms
    int prevX = -1, prevY = -1;
    int xoffset = 0, yoffset = 0;
    int minx=0, midy, miny=0, maxx=0, midx, maxy=0, num = 0;
    double xscale = 1.0, yscale = 1.0;
    ArrayList<Integer> coord = new ArrayList<Integer>();

    // You might want to try frame.setResizable(false) if you want your frame
    // and your panel to stay the same size.
    private final Dimension prefPanelSize = new Dimension(450, 450);

    public LineChart(String insis){
        super();    // Call the constructor of JPanel, the class this subclasses.
        if (insis == "") insis = JOptionPane.showInputDialog("Please enter your comma separated co-ordinate list, or later you can click points on your line graph: ");
        coordize(insis);
        //JButton button =new JButton("press");
        //this.add(button);
        this.setSize(prefPanelSize);
        addMouseListener(this);

        timer.start();  // Start the timer
    }
    
    public void coordize(String ins) {
      int inum = 0;
      if (ins.length() != 0) {
        String scoord[] = ins.split(",");
        for (String s:scoord) {
          if (s != "") {
            coord.add(Integer.parseInt(s));
            if (inum == 0) {
              minx = coord.get(inum);
              maxx = coord.get(inum);
            } else if (inum == 1) {
              miny = coord.get(inum);
              maxy = coord.get(inum);
            } else if ((inum % 2) == 0) {
              if (minx > coord.get(inum)) minx = coord.get(inum);
              if (maxx < coord.get(inum)) maxx = coord.get(inum);
            } else {
              if (miny > coord.get(inum)) miny = coord.get(inum);
              if (maxy < coord.get(inum)) maxy = coord.get(inum);
            }
            inum = inum + 1;
          }
        }
        
        midx = (maxx - minx) / 2;
        midy = (maxy - miny) / 2;
        
        if (minx >= 0 && maxx <= 600 && miny >= 0 && maxy <= 600) {
          xscale = 1.0;
          yscale = 1.0;
        } else {
          if ((maxx - minx) > 600) {
             xoffset = (minx / 50) * 50;
             xscale = (maxx - xoffset) / 600.0;
          } else if (maxx > 600) {
             xoffset = (minx / 50) * 50;
             xscale = 1.0;
          }
          if ((maxy - miny) > 600) {
             yoffset = (miny / 50) * 50;
             yscale = (maxy - yoffset) / 600.0;
          } else if (maxy > 600) {
             yoffset = (miny / 50) * 50;
             yscale = 1.0;
          }
        }
      }
        
    }

    @Override
    public void paintComponent(Graphics g) {
        int x1, x2, y1, y2, isokay;
        long xx1, yy1;
    
        super.paintComponent(g);  // fixes the immediate problem.
        Graphics2D g2 = (Graphics2D) g;
        
        // Axis annotation
        g2.setColor(Color.blue);
        g2.drawString("X", (650 / 2), 685);
        g2.drawString("Y", 2, (650 / 2));
        
        // Numbering legends
        xx1 = xoffset;
        yy1 = yoffset;
        g2.setColor(Color.magenta);
        for (int x = 50; x <= 650; x = x + 50) {
          g2.drawString("" + xx1, x, 672);
          xx1 += 50 * Math.round(xscale);
        }
        for (int y = 650; y >= 50; y = y - 50) {
          g2.drawString("" + yy1, 5, y);
          yy1 += 50 * Math.round(yscale);
        }

        // Lines of 10 pixels
        g2.setColor(Color.lightGray);
        for (int x = 50; x <= 650; x = x + 10) {
          g2.drawLine(x, 50, x, 650);
        }
        for (int y = 50; y <= 650; y = y + 10) {
          g2.drawLine(50, y, 650, y);
        }
 
        // Lines of 50 pixels
        g2.setColor(Color.black);
        for (int x = 50; x <= 650; x = x + 50) {
          g2.drawLine(x, 50, x, 650);
        }
        for (int y = 50; y <= 650; y = y + 50) {
          g2.drawLine(50, y, 650, y);
        }
       
		g2.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE);
        isokay = 1;
        g2.setColor(Color.red);
        for (int ij = 3; ij < coord.size(); ij = ij + 2) {
          if (coord.get(ij - 1) < 0 && coord.get(ij - 0) < 0) {
           x2 = Math.abs(coord.get(ij - 1));   // mouse
           y2 = Math.abs(coord.get(ij - 0));
           isokay = 2;
          } else {  // supplied
           x2 = 50 + Math.round(((xoffset * 0 + coord.get(ij - 1)) - xoffset) / Math.round(xscale));
           y2 = 650 - Math.round(((yoffset * 0 + coord.get(ij)) - yoffset) / Math.round(yscale));
          }
          if (coord.get(ij - 3) < 0 && coord.get(ij - 2) < 0) {
           g2.setColor(Color.orange);
           x1 = Math.abs(coord.get(ij - 3));   // mouse
           y1 = Math.abs(coord.get(ij - 2));
          } else {  // supplied
           if (isokay == 2) isokay = 0;
           x1 = 50 + Math.round(((xoffset * 0 + coord.get(ij - 3)) - xoffset) / Math.round(xscale));
           y1 = 650 - Math.round(((yoffset * 0 + coord.get(ij - 2)) - yoffset) / Math.round(yscale));
          }
          if (isokay != 0) {
            g2.drawLine(x1, y1, x2, y2);
            g2.drawLine(x1, y1, x2, y2);
            g2.drawLine(x1, y1 - 1, x2, y2 - 1);
            g2.drawLine(x1, y1 + 1, x2, y2 + 1);
            g2.drawLine(x1 - 1, y1, x2 - 1, y2);
            g2.drawLine(x1 + 1, y1, x2 + 1, y2);
          }
        }

    }

    @Override
    public Dimension getPreferredSize()
    {
        return prefPanelSize;
    }

    public static void main(String []args){
        //cstring = args[0];
        LineChart s;
        if (args.length >= 1) {
           s = new LineChart(args[0]);
        } else {
           s = new LineChart("");
        }
        JFrame frame = new JFrame();
        frame.setTitle("Line Graph");
        frame.setVisible(true);
        frame.setSize(new Dimension(1050, 1050));
        frame.add(s);
        frame.setResizable(false);
    }

    // This method is called ever 20 ms because of the timer.
    @Override
    public void actionPerformed(ActionEvent e) {
    }
    
    
    public void mousePressed(MouseEvent e) {
       int xx1, yy1;
       saySomething("Mouse pressed; # of clicks: "
                    + e.getClickCount() + " " + e.getX() + "," + e.getY(), e);
       if (prevX == -1 && prevY == -1) {
         prevX = e.getX();
         prevY = e.getY();

         xx1 = (prevX - 50);
         xx1 *= Math.round(xscale);
         xx1 += xoffset;
         yy1 = (prevY + 650);
         yy1 *= Math.round(yscale);
         yy1 += yoffset;
         
         coord.add(-prevX);
         coord.add(-prevY);
       } else {

           xx1 = (e.getX() - 50);
           xx1 *= Math.round(xscale);
           xx1 += xoffset;
           yy1 = (e.getY() + 650);
           yy1 *= Math.round(yscale);
           yy1 += yoffset;
         
           coord.add(-e.getX());
           coord.add(-e.getY());
         
           prevX = e.getX();
           prevY = e.getY();
           repaint();
       }
    }

    public void mouseReleased(MouseEvent e) {
       saySomething("Mouse released; # of clicks: "
                    + e.getClickCount(), e);
    }

    public void mouseEntered(MouseEvent e) {
       saySomething("Mouse entered", e);
    }

    public void mouseExited(MouseEvent e) {
       saySomething("Mouse exited", e);
    }

    public void mouseClicked(MouseEvent e) {
       saySomething("Mouse clicked (# of clicks: "
                    + e.getClickCount() + ")", e);
    }

    void saySomething(String eventDescription, MouseEvent e) {
     if (1 == 2) {
        String yourInfo = JOptionPane.showInputDialog(eventDescription + " detected on "
                        + e.getComponent().getClass().getName()
                        + ".");
     }
    }
    
}