kern/src/de/memtext/icons/BasicIcon.java

package de.memtext.icons;

import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;

import javax.swing.Icon;
import javax.swing.JButton;

public abstract class BasicIcon implements Icon {
    private int iconWidth = 16, iconHeight = 16;

    private Color color = Color.black;

    /**
     * @see javax.swing.Icon#getIconWidth()
     */
    @Override
    public int getIconWidth() {
        return iconWidth;
    }

    /**
     * @see javax.swing.Icon#getIconHeight()
     */
    @Override
    public int getIconHeight() {
        return iconHeight;
    }

    @Override
    public void paintIcon(Component c, Graphics g, int x, int y) {
        g.translate(x, y);
        if (c.isEnabled())
            g.setColor(color);
        else
            g.setColor(Color.GRAY);
        myPaint(g);
        g.translate(-x, -y);
    }

    abstract void myPaint(Graphics g);

    void drawDoubleLine(Graphics g, int y) {
        if (y > getIconHeight() - 2) throw new IllegalArgumentException("can't draw that low");
        g.drawLine(0, y, getIconWidth(), y);
        g.drawLine(0, y + 1, getIconWidth(), y + 1);
    }

    void drawArrowRight(Graphics g) {
        int midx = (int) Math.floor(getIconWidth() / 2);
        int midy = (int) Math.floor(getIconHeight() / 2);
        //		mittellinie
        g.drawLine(0, midy - 1, getIconWidth(), midy - 1);
        g.drawLine(0, midy, getIconWidth(), midy);
        g.drawLine(0, midy + 1, getIconWidth(), midy + 1);

        g.drawLine(midx + 1, 1, getIconWidth(), midy - 1);
        g.drawLine(midx + 1, 2, getIconWidth(), midy);

        g.drawLine(midx + 1, getIconHeight() - 1, getIconWidth(), midy + 1);
        g.drawLine(midx + 1, getIconHeight() - 2, getIconWidth(), midy);

    }

    void drawArrowUp(Graphics g, int y) {
        int midx = (int) Math.floor(getIconWidth() / 2);
        int midy = (int) Math.floor(getIconHeight() / 2);
        g.drawLine(0, y + midy, midx, y);
        g.drawLine(midx, y, getIconWidth(), y + midy);
        g.drawLine(0, y + midy + 1, midx, y + 1);
        g.drawLine(midx, y + 1, getIconWidth(), y + midy + 1);

    }

    void drawArrowDown(Graphics g, int y) {
        int midx = (int) Math.floor(getIconWidth() / 2);
        int midy = (int) Math.floor(getIconHeight() / 2);
        g.drawLine(0, y, midx, midy + y);
        g.drawLine(midx, y + midy, getIconWidth(), y);
        g.drawLine(0, y + 1, midx, midy + y + 1);
        g.drawLine(midx, y + midy + 1, getIconWidth(), y + 1);

    }

    public static void main(String[] args) {
        de.memtext.widgets.MBFrame f = new de.memtext.widgets.MBFrame("test");
        f.setCenter(new JButton("test", new ArrowRight()));
        f.pack();
        f.show();
    }

    public void setIconHeight(int i) {
        iconHeight = i;
    }

    public void setIconWidth(int i) {
        iconWidth = i;
    }

    public Color getColor() {
        return color;
    }

    public void setColor(Color color) {
        this.color = color;
    }

}