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

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Freedom for Media in Java

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package net.sf.fmj.ejmf.toolkit.gui.controls;

import java.awt.*;

import javax.swing.*;
import javax.swing.border.*;

/**
 * A panel containing two buttons for manipulating gain.
 * 
 * Subclasses provide buttons but supplying definitions of the following two
 * methods:
 * 
 * AbstractButton createGainIncreaseButton(); AbstractButton
 * createGainDecreaseButton();
 */

public abstract class AbstractGainButtonPanel extends JPanel
{
    protected AbstractButton gainIncreaseButton;
    protected AbstractButton gainDecreaseButton;

    public AbstractGainButtonPanel(Skin skin)
    {
        GridLayout grid;
        setLayout(grid = new GridLayout(2, 1));
        grid.setVgap(0);
        grid.setHgap(0);
        setBorder(new EmptyBorder(0, 0, 0, 0));
        add(gainIncreaseButton = createGainIncreaseButton(skin));
        add(gainDecreaseButton = createGainDecreaseButton(skin));
    }

    /**
     * Create a button for decreasing gain.
     */
    protected abstract AbstractButton createGainDecreaseButton(Skin skin);

    /**
     * Create a button for increasing gain.
     *
     * @return An AbstractButton
     */
    protected abstract AbstractButton createGainIncreaseButton(Skin skin);

    /**
     * Get button repsonsible for decreasing gain
     *
     * @return An AbstractButton
     */
    public AbstractButton getGainDecreaseButton()
    {
        return gainDecreaseButton;
    }

    /**
     * Get button repsonsible for increasing gain
     *
     * @return An AbstractButton
     */
    public AbstractButton getGainIncreaseButton()
    {
        return gainIncreaseButton;
    }
}