bcv-vf/src/com/jhe/hexed/JHexEditor.java

package com.jhe.hexed;

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

/**
 * Created by IntelliJ IDEA. User: laullon Date: 08-abr-2003 Time: 13:21:09
 */
public class JHexEditor extends JPanel implements FocusListener,
		AdjustmentListener, MouseWheelListener {
	private static final long serialVersionUID = 2289328616534802372L;
	byte[] buff;
	public int cursor;
	protected static Font font = new Font("Monospaced", 0, 12);
	protected int border = 2;
	public boolean DEBUG = false;
	private JPanel panel;
	private JScrollBar sb;
	private int inicio = 0;
	private int lineas = 10;

	public JHexEditor(byte[] buff) {
		super();
		this.buff = buff;

		this.addMouseWheelListener(this);

		sb = new JScrollBar(JScrollBar.VERTICAL);
		sb.addAdjustmentListener(this);
		sb.setMinimum(0);
		sb.setMaximum(buff.length / getLineas());

		JPanel p1, p2, p3;
		// centro
		p1 = new JPanel(new BorderLayout(1, 1));
		p1.add(new JHexEditorHEX(this), BorderLayout.CENTER);
		p1.add(new Columnas(), BorderLayout.NORTH);

		// izq.
		p2 = new JPanel(new BorderLayout(1, 1));
		p2.add(new Filas(), BorderLayout.CENTER);
		p2.add(new Caja(), BorderLayout.NORTH);

		// der
		p3 = new JPanel(new BorderLayout(1, 1));
		p3.add(sb, BorderLayout.EAST);
		p3.add(new JHexEditorASCII(this), BorderLayout.CENTER);
		p3.add(new Caja(), BorderLayout.NORTH);

		panel = new JPanel();
		panel.setLayout(new BorderLayout(1, 1));
		panel.add(p1, BorderLayout.CENTER);
		panel.add(p2, BorderLayout.WEST);
		panel.add(p3, BorderLayout.EAST);

		this.setLayout(new BorderLayout(1, 1));
		this.add(panel, BorderLayout.CENTER);
	}

	public void paint(Graphics g) {
		FontMetrics fn = getFontMetrics(font);
		Rectangle rec = this.getBounds();
		lineas = (rec.height / fn.getHeight()) - 1;
		int n = (buff.length / 16) - 1;
		if (lineas > n) {
			lineas = n;
			inicio = 0;
		}

		sb.setValues(getInicio(), +getLineas(), 0, buff.length / 16);
		sb.setValueIsAdjusting(true);
		super.paint(g);
	}

	protected void actualizaCursor() {
		int n = (cursor / 16);

		System.out.print("- " + inicio + "<" + n + "<" + (lineas + inicio)
				+ "(" + lineas + ")");

		if (n < inicio)
			inicio = n;
		else if (n >= inicio + lineas)
			inicio = n - (lineas - 1);

		System.out.println(" - " + inicio + "<" + n + "<" + (lineas + inicio)
				+ "(" + lineas + ")");

		repaint();
	}

	protected int getInicio() {
		return inicio;
	}

	protected int getLineas() {
		return lineas;
	}

	protected void fondo(Graphics g, int x, int y, int s) {
		FontMetrics fn = getFontMetrics(font);
		g.fillRect(((fn.stringWidth(" ") + 1) * x) + border,
				(fn.getHeight() * y) + border, ((fn.stringWidth(" ") + 1) * s),
				fn.getHeight() + 1);
	}

	protected void cuadro(Graphics g, int x, int y, int s) {
		FontMetrics fn = getFontMetrics(font);
		g.drawRect(((fn.stringWidth(" ") + 1) * x) + border,
				(fn.getHeight() * y) + border, ((fn.stringWidth(" ") + 1) * s),
				fn.getHeight() + 1);
	}

	protected void printString(Graphics g, String s, int x, int y) {
		FontMetrics fn = getFontMetrics(font);
		g.drawString(s, ((fn.stringWidth(" ") + 1) * x) + border,
				((fn.getHeight() * (y + 1)) - fn.getMaxDescent()) + border);
	}

	public void focusGained(FocusEvent e) {
		this.repaint();
	}

	public void focusLost(FocusEvent e) {
		this.repaint();
	}

	public void adjustmentValueChanged(AdjustmentEvent e) {
		inicio = e.getValue();
		if (inicio < 0)
			inicio = 0;
		repaint();
	}

	public void mouseWheelMoved(MouseWheelEvent e) {
		inicio += (e.getUnitsToScroll());
		if ((inicio + lineas) >= buff.length / 16)
			inicio = (buff.length / 16) - lineas;
		if (inicio < 0)
			inicio = 0;
		repaint();
	}

	public void keyPressed(KeyEvent e) {
		/*
		 * switch(e.getKeyCode()) { case 33: // rep if(cursor>=(16*lineas))
		 * cursor-=(16*lineas); actualizaCursor(); break; case 34: // fin
		 * if(cursor<(buff.length-(16*lineas))) cursor+=(16*lineas);
		 * actualizaCursor(); break; case 35: // fin cursor=buff.length-1;
		 * actualizaCursor(); break; case 36: // ini cursor=0;
		 * actualizaCursor(); break; case 37: // <-- if(cursor!=0) cursor--;
		 * actualizaCursor(); break; case 38: // <-- if(cursor>15) cursor-=16;
		 * actualizaCursor(); break; case 39: // --> if(cursor!=(buff.length-1))
		 * cursor++; actualizaCursor(); break; case 40: // -->
		 * if(cursor<(buff.length-16)) cursor+=16; actualizaCursor(); break; }
		 */
	}

	private class Columnas extends JPanel {
		private static final long serialVersionUID = -1734199617526339842L;

		public Columnas() {
			this.setLayout(new BorderLayout(1, 1));
		}

		public Dimension getPreferredSize() {
			return getMinimumSize();
		}

		public Dimension getMinimumSize() {
			Dimension d = new Dimension();
			FontMetrics fn = getFontMetrics(font);
			int h = fn.getHeight();
			int nl = 1;
			d.setSize(((fn.stringWidth(" ") + 1) * +((16 * 3) - 1))
					+ (border * 2) + 1, h * nl + (border * 2) + 1);
			return d;
		}

		public void paint(Graphics g) {
			Dimension d = getMinimumSize();
			g.setColor(Color.white);
			g.fillRect(0, 0, d.width, d.height);
			g.setColor(Color.black);
			g.setFont(font);

			for (int n = 0; n < 16; n++) {
				if (n == (cursor % 16))
					cuadro(g, n * 3, 0, 2);
				String s = "00" + Integer.toHexString(n);
				s = s.substring(s.length() - 2);
				printString(g, s, n * 3, 0);
			}
		}
	}

	private class Caja extends JPanel {
		private static final long serialVersionUID = -6124062720565016834L;

		public Dimension getPreferredSize() {
			return getMinimumSize();
		}

		public Dimension getMinimumSize() {
			Dimension d = new Dimension();
			FontMetrics fn = getFontMetrics(font);
			int h = fn.getHeight();
			d.setSize((fn.stringWidth(" ") + 1) + (border * 2) + 1, h
					+ (border * 2) + 1);
			return d;
		}

	}

	private class Filas extends JPanel {
		private static final long serialVersionUID = 8797347523486018051L;

		public Filas() {
			this.setLayout(new BorderLayout(1, 1));
		}

		public Dimension getPreferredSize() {
			return getMinimumSize();
		}

		public Dimension getMinimumSize() {
			Dimension d = new Dimension();
			FontMetrics fn = getFontMetrics(font);
			int h = fn.getHeight();
			int nl = getLineas();
			d.setSize((fn.stringWidth(" ") + 1) * (8) + (border * 2) + 1, h
					* nl + (border * 2) + 1);
			return d;
		}

		public void paint(Graphics g) {
			Dimension d = getMinimumSize();
			g.setColor(Color.white);
			g.fillRect(0, 0, d.width, d.height);
			g.setColor(Color.black);
			g.setFont(font);

			int ini = getInicio();
			int fin = ini + getLineas();
			int y = 0;
			for (int n = ini; n < fin; n++) {
				if (n == (cursor / 16))
					cuadro(g, 0, y, 8);
				String s = "0000000000000" + Integer.toHexString(n);
				s = s.substring(s.length() - 8);
				printString(g, s, 0, y++);
			}
		}
	}

}