scrollbutton.java

用于java swing的皮肤软件

package com.digitprop.tonic;


import java.awt.*;

import javax.swing.*;
import javax.swing.plaf.basic.BasicArrowButton;


/**	Button for JScrollBars.
 * 
 * 	@author	Markus Fischer
 * 
 * 	<p>This software is under the <a href="http://www.gnu.org/copyleft/lesser.html" target="_blank">GNU Lesser General Public License</a>
 */

/*
 * ------------------------------------------------------------------------
 * Copyright (C) 2004 Markus Fischer
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License version 2.1 as published by the Free Software Foundation.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free 
 * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, 
 * MA 02111-1307  USA
 * 
 * You can contact the author at:
 *    Markus Fischer
 *    www.digitprop.com
 *    [e-mail]
 * ------------------------------------------------------------------------
 */
public class ScrollButton extends BasicArrowButton
{
	/**	The shadow color */
	private static Color shadowColor;
	
	/**	The highlight color */
	private static Color highlightColor;
	
	/**	If true, this button is free standing, i.e. does not touch any edge of
	 * 	the parent component.
	 */
	private boolean isFreeStanding= false;

	/**	Width of the button */
	private int buttonWidth;
	
	/**	Icon to be displayed on the button */
	private Icon icon;
	

	/**	Creates an instance.
	 * 
	 * 	@param	direction		The direction into which the arrow on the button
	 * 									is to point. This must be a SwingConstants constant.
	 *		@param	width				The width of the button
	 *		@param	freeStanding	If true, the button is freestanding
	 */
	public ScrollButton(int direction, int width, boolean freeStanding)
	{
		super(direction);

		shadowColor= UIManager.getColor("ScrollBar.darkShadow");
		highlightColor= UIManager.getColor("ScrollBar.highlight");

		buttonWidth= width;
		isFreeStanding= freeStanding;
	}


	/**	Sets whether the button is free standing, i.e. does not touch any
	 * 	edge of the parent component.
	 */
	public void setFreeStanding(boolean freeStanding)
	{
		isFreeStanding= freeStanding;
	}

	
	/**	Paints this button */
	public void paint(Graphics g)
	{
		g.setColor(getBackground());
		g.fillRect(0, 0, getWidth(), getHeight());
		
		g.setColor(UIManager.getColor("Button.borderColor"));
		Rectangle shadowRect=new Rectangle(0, 0, getWidth(), getHeight());
		
		boolean isPressed=model.isPressed();		
		int delta=(isPressed ? 1 : 0);
		
		if(isPressed)
		{
			g.setColor(UIManager.getColor("Button.highlight"));
			g.drawRect(shadowRect.x, shadowRect.y, shadowRect.width-1, shadowRect.height-1);
			
			g.setColor(UIManager.getColor("Button.shadow"));
			g.drawLine(shadowRect.x, shadowRect.y, shadowRect.x+shadowRect.width-1, shadowRect.y);
			g.drawLine(shadowRect.x, shadowRect.y, shadowRect.x, shadowRect.y+shadowRect.height-1);
		}
		
		if(icon==null)
		{
			switch(direction)
			{
				case EAST:
					icon=UIManager.getIcon("Arrow.right");
					break;
					
				case WEST:
					icon=UIManager.getIcon("Arrow.left");
					break;
					
				case NORTH:
					icon=UIManager.getIcon("Arrow.up");
					break;
					
				case SOUTH:
					icon=UIManager.getIcon("Arrow.down");
					break;
			}
		}

		if(icon!=null)
			icon.paintIcon(this, g, getWidth()/2-icon.getIconWidth()/2+delta, getHeight()/2-icon.getIconHeight()/2+delta);					
	}


	/**	Returns the preferred size for this button */
	public Dimension getPreferredSize()
	{
		if (getDirection() == NORTH)
		{
			return new Dimension(buttonWidth, buttonWidth);
		}
		else if (getDirection() == SOUTH)
		{
			return new Dimension(
				buttonWidth,
				buttonWidth);
		}
		else if (getDirection() == EAST)
		{
			return new Dimension(
				buttonWidth,
				buttonWidth);
		}
		else if (getDirection() == WEST)
		{
			return new Dimension(buttonWidth, buttonWidth);
		}
		else
		{
			return new Dimension(0, 0);
		}
	}

	/**	Returns the minimum size for this button */
	public Dimension getMinimumSize()
	{
		return getPreferredSize();
	}


	/**	Returns the maximum size for this button */
	public Dimension getMaximumSize()
	{
		return new Dimension(Integer.MAX_VALUE, Integer.MAX_VALUE);
	}

	
	/**	Returns the button width */
	public int getButtonWidth()
	{
		return buttonWidth;
	}
}