net.sf.fmj.ejmf.toolkit.gui.controls.skins.ejmf.BasicControlButton Maven / Gradle / Ivy

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Freedom for Media in Java
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package net.sf.fmj.ejmf.toolkit.gui.controls.skins.ejmf;

import java.awt.*;

import javax.swing.*;

/**
 * Draws basic Control Panel buttons. Subclasses supply implementation of
 * painIcon to draw button icon.
 * 
 * This class takes care of drawing 'pressed' and 'enabled/disabled' look of
 * button.
 */

public abstract class BasicControlButton extends JButton implements
        SwingConstants
{
    public BasicControlButton()
    {
        setBackground(UIManager.getColor("control"));
    }

    /**
     * Don't let button get so small that icon is unrecognizable.
     */
    @Override
    public Dimension getMinimumSize()
    {
        return new Dimension(5, 5);
    }

    /**
     * All Control Panel buttons have same preferred size.
     */
    @Override
    public Dimension getPreferredSize()
    {
        return new Dimension(20, 20);
    }

    /**
     * Always return false.
     */
    @Override
    public boolean isFocusTraversable()
    {
        return false;
    }

    /**
     * Paint the background and border or button component. Call out to painIcon
     * to draw icon in button.
     * 
     * This method takes care of all bevellng, etc depending on whether button
     * is pressed of enabled/disabled.
     */

    @Override
    public void paint(Graphics g)
    {
        Color origColor;
        boolean isPressed, isEnabled;
        int w, h, size;

        w = getSize().width;
        h = getSize().height;
        origColor = g.getColor();
        isPressed = getModel().isPressed();
        isEnabled = isEnabled();

        g.setColor(getBackground());
        g.fillRect(1, 1, w - 2, h - 2);

        if (isPressed)
        {
            g.setColor(UIManager.getColor("controlShadow"));
            g.drawRect(0, 0, w - 1, h - 1);
        } else
        {
            g.drawLine(0, 0, 0, h - 1);
            g.drawLine(1, 0, w - 2, 0);

            g.setColor(UIManager.getColor("controlHighlight")); // inner 3D
                                                                // border
            g.drawLine(1, 1, 1, h - 3);
            g.drawLine(2, 1, w - 3, 1);

            g.setColor(UIManager.getColor("controlShadow")); // inner 3D border
            g.drawLine(1, h - 2, w - 2, h - 2);
            g.drawLine(w - 2, 1, w - 2, h - 3);

            g.setColor(UIManager.getColor("controlDkShadow")); // black drop
                                                               // shadow
            g.drawLine(0, h - 1, w - 1, h - 1);
            g.drawLine(w - 1, h - 1, w - 1, 0);
        }

        if (h < 5 || w < 5)
        {
            g.setColor(origColor);
            return;
        }

        if (isPressed)
        {
            g.translate(1, 1);
        }

        size = Math.min((h - 4) / 3, (w - 4) / 3);
        size = Math.max(size, 2);
        paintIcon(g, (w - size) / 2, (h - size) / 2, size, isEnabled);

        // Reset the Graphics back to it's original settings
        if (isPressed)
        {
            g.translate(-1, -1);
        }
        g.setColor(origColor);

    }

    /**
     * Paint icon into button Component
     */
    protected abstract void paintIcon(Graphics g, int x, int y, int size,
            boolean isEnabled);

}