Application: gvSIG desktop

package org.gvsig.raster.swing.legend.impl.colortable.selector;

import java.awt.Color;

import java.awt.Component;

import java.awt.Graphics2D;

import java.awt.Rectangle;

import java.awt.image.BufferedImage;

import javax.swing.ImageIcon;

import javax.swing.JComponent;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JTable;

import javax.swing.table.TableCellRenderer;

import org.gvsig.raster.lib.legend.api.colortable.ColorTable;

/**

 * @author fdiaz

 *

 */

public class PreviewerColorTableCellRenderer extends JLabel implements TableCellRenderer {

    /**

     *

     */

    private static final long serialVersionUID = 9027225839371919399L;

    private ColorTable colorTable;

    @Override

    public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus,

        int row, int column) {

        if (value instanceof ColorTable) {

            this.colorTable = (ColorTable)value;

            Rectangle cellRect = table.getCellRect(row, column, false);

            BufferedImage image = new BufferedImage((int)cellRect.getWidth(), (int)cellRect.getHeight(), BufferedImage.TYPE_4BYTE_ABGR);

            this.paintImage(image, isSelected);

            ImageIcon icon = new ImageIcon(image, this.colorTable.getName());

            this.setIcon(icon);

        }

        return this;

    }

    private void paintImage(BufferedImage image, boolean isSelected) {

        Graphics2D g = (Graphics2D)image.getGraphics();

        Rectangle area = new Rectangle(image.getWidth(), image.getHeight());

        int x1 = area.x;

        int x2 = area.x + area.width - 1;

        Color bgColor = new Color(224, 224, 224);

        for (int i = 0; (i * 4) <= area.width; i++) {

            for (int j = 0; (j * 4) <= area.height; j++) {

                if ((i + j) % 2 == 0)

                    g.setColor(Color.white);

                else

                    g.setColor(bgColor);

                g.fillRect(area.x + 1 + i * 4, area.y + 1 + j * 4, 4, 4);

            }

        }

        if (colorTable.getClasses().size() >= 1) {

            double min = colorTable.getClasses().get(0).getValue();

            double max = colorTable.getClasses().get(colorTable.getClasses().size() - 1).getValue();

            for (int i = area.x; i < (area.x + area.width); i++) {

                double pos = min + (((max - min) * (i - area.x)) / (area.width - 2));

                byte[] col3 = colorTable.getRGBA(pos);

                g.setColor(new Color(col3[0] & 0xff, col3[1] & 0xff, col3[2] & 0xff, col3[3] & 0xff));

                g.drawLine(i, area.y, i, area.y + area.height);

            }

        } else {

            g.setColor(new Color(224, 224, 224));

            g.fillRect(x1, area.y, x2 - x1, area.height); // - 1);

        }

        if (isSelected) { //?????

            g.setColor(Color.black);

        } else {

            g.setColor(new Color(96, 96, 96));

        }

        g.drawRect(x1, area.y, x2 - x1, area.height - 1);

    }

}