SexyArrowButtonUI.java

/*
 * Copyright (c) 2010-2012 Célio Cidral Junior.
 *
 *     Licensed under the Apache License, Version 2.0 (the "License");
 *     you may not use this file except in compliance with the License.
 *     You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 *     Unless required by applicable law or agreed to in writing, software
 *     distributed under the License is distributed on an "AS IS" BASIS,
 *     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *     See the License for the specific language governing permissions and
 *     limitations under the License.
 */

package org.tomighty.ui.swing.laf;

import static java.awt.RenderingHints.KEY_ANTIALIASING;
import static java.awt.RenderingHints.VALUE_ANTIALIAS_ON;

import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;

import javax.inject.Inject;
import javax.swing.AbstractButton;
import javax.swing.ButtonModel;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.plaf.basic.BasicButtonUI;

import org.tomighty.ui.theme.Look;

public class SexyArrowButtonUI extends BasicButtonUI {
	
	@Inject
    private Look look;
	
	@Override
	public void installUI(JComponent component) {
		super.installUI(component);
		JButton button = (JButton)component;
		button.setSize(new Dimension(17, 16));
		button.setOpaque(false);
		button.setBorderPainted(false);
	}
	
	@Override
	public void paint(Graphics g, JComponent c) {
		Graphics2D g2d = (Graphics2D)g;
		g2d.setRenderingHint(KEY_ANTIALIASING, VALUE_ANTIALIAS_ON);
		
		AbstractButton button = (AbstractButton) c;
		ButtonModel model = button.getModel();
		if(model.isRollover()) {
			paintBackground(g2d, button);
			paintRoundBorder(g2d, button);
		}
		
		g.translate(3, 5);
		
		g.setColor(Color.WHITE);
		g.drawLine(1, 0, 5, 4);
		g.drawLine(0, 0, 5, 5);
		g.drawLine(5, 4, 9, 0);
		g.drawLine(5, 5, 10, 0);
		
		g.setColor(look.colors().shadow());
		g.drawLine(0, 1, 5, 6);
		g.drawLine(5, 6, 10, 1);
	}

	private void paintRoundBorder(Graphics2D g, AbstractButton b) {
		Color color = look.colors().shadow();
		g.setColor(color);
		g.drawRoundRect(0, 0, b.getWidth()-1, b.getHeight()-1, 4, 4);
	}

	private void paintBackground(Graphics2D graphics, AbstractButton b) {
		Graphics2D g = (Graphics2D) graphics.create();
		try {
			g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.4f));
			Color startingColor = look.colors().shadow().brighter().brighter();
			Color endingColor = look.colors().shadow().darker();
			g.setPaint(new GradientPaint(0, 0, startingColor, 0, b.getHeight(), endingColor));
			g.fillRect(1, 1, b.getWidth()-2, b.getHeight()-2);
		} finally {
			g.dispose();
		}
	}
	
}