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package net.sf.cuf.ui.table;

import java.awt.Component;
import java.awt.Graphics;
import java.awt.SystemColor;
import javax.swing.AbstractButton;
import javax.swing.Icon;

/**
 * Icons for TableHeader in {@link TableHeaderRenderer}.
 *
 * @author  Jörg Eichhorn, sd&m AG
 */
class TableHeaderIcon implements Icon
{
    /** ascending or descending icon? */
    private boolean mAscending = true;

    /** the ascending icon */
    protected static final Icon ICON_SORT_ASCENDING = new TableHeaderIcon(true);

    /** the descending icon */
    protected static final Icon ICON_SORT_DESCENDING = new TableHeaderIcon(false);


    /**
     * Create a new TableHeaderIcon.
     *
     * @param pAscending true for ascending icon, false for descending icon
     */
    private TableHeaderIcon(final boolean pAscending)
    {
        mAscending = pAscending;
    }


    /**
     * Get ascending icon.
     *
     * @return the ascending icon
     */
    public static Icon getIconSortAscending()
    {
        return ICON_SORT_ASCENDING;
    }

    /**
     * Get descending icon.
     *
     * @return the descending icon
     */
    public static Icon getIconSortDescending()
    {
        return ICON_SORT_DESCENDING;
    }

    /**
     * Returns the icon's height.
     *
     * @return an int specifying the fixed height of the icon.
     */
    public int getIconHeight()
    {
        return 12;
    }

    /**
     * Returns the icon's width.
     *
     * @return an int specifying the fixed width of the icon.
     */
    public int getIconWidth()
    {
        return 8;
    }

    /**
     * Draw the icon at the specified location.
     *
     * @param pComponent the component to draw in
     * @param pGraphics the graphics-context to use
     * @param pX the x-coordinate to draw the icon at
     * @param pY the y-coordinate to draw the icon at
     */
    public void paintIcon(final Component pComponent, final Graphics pGraphics, final int pX, final int pY)
    {
        boolean selected = ((AbstractButton) pComponent).isSelected() || ((AbstractButton) pComponent).getModel().isPressed();
        int maxX = mAscending ? 7 : 5;
        int maxY = 11;
        pGraphics.translate(pX, pY);

        if (selected)
        {
            if (mAscending)
            {
                pGraphics.setColor(SystemColor.controlDkShadow);
                pGraphics.drawLine(1, 0, 1, maxY);
                pGraphics.setColor(SystemColor.controlShadow);
                pGraphics.drawLine(2, 0, maxX, maxY);
                pGraphics.drawLine(2, maxY, maxX - 1, maxY);
                pGraphics.setColor(SystemColor.control);
                pGraphics.drawLine(2, 2, 2, maxY - 1);
                pGraphics.setColor(SystemColor.controlShadow);
                pGraphics.drawLine(3, 6, 3, 9);
                pGraphics.drawLine(4, 8, 4, 9);
                pGraphics.setColor(SystemColor.controlDkShadow);
                pGraphics.drawLine(3, maxY - 1, maxX - 1, maxY - 1);
                pGraphics.drawLine(3, 4, maxX - 2, maxY - 2);
            }
            else
            {
                pGraphics.setColor(SystemColor.controlDkShadow);
                pGraphics.drawLine(0, 0, maxX - 1, maxY - 2);
                pGraphics.drawLine(1, 0, maxX - 1, 0);
                pGraphics.setColor(SystemColor.controlShadow);
                pGraphics.drawLine(maxX, 0, maxX, maxY);
                pGraphics.setColor(SystemColor.control);
                pGraphics.drawLine(1, 1, 4, 1);
                pGraphics.setColor(SystemColor.controlShadow);
                pGraphics.drawLine(2, 2, 3, 2);
                pGraphics.drawLine(2, 3, 3, 3);
                pGraphics.drawLine(3, 4, 3, 5);
                pGraphics.setColor(SystemColor.controlDkShadow);
                pGraphics.drawLine(maxX - 1, 2, maxX - 1, 7);
            }
        }
        else
        {
            if (mAscending)
            {
                pGraphics.setColor(SystemColor.controlDkShadow);
                pGraphics.drawLine(1, 0, 1, maxY);
                pGraphics.setColor(SystemColor.controlHighlight);
                pGraphics.drawLine(2, 0, 8, maxY);
                pGraphics.drawLine(2, maxY, maxX, maxY);
            }
            else
            {
                pGraphics.setColor(SystemColor.controlDkShadow);
                pGraphics.drawLine(1, 0, maxX, 0);
                pGraphics.drawLine(0, 0, maxX - 1, maxY - 2);
                pGraphics.setColor(SystemColor.controlHighlight);
                pGraphics.drawLine(maxX, 1, maxX, maxY);
            }
        }
        pGraphics.translate(-pX, -pY);
    }
}