JSkatTabComponent.java

/**
 * This file is part of JSkat.
 *
 * JSkat is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * JSkat 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with JSkat.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.jskat.gui.swing;

import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTabbedPane;
import javax.swing.plaf.basic.BasicButtonUI;

import org.jskat.control.JSkatEventBus;
import org.jskat.control.event.table.TableRemovedEvent;
import org.jskat.data.JSkatViewType;
import org.jskat.gui.img.JSkatGraphicRepository;
import org.jskat.gui.img.JSkatGraphicRepository.Icon;
import org.jskat.gui.img.JSkatGraphicRepository.IconSize;

/**
 * Tab component with title and close button<br>
 * inspired by Java tutorial from Sun
 */
public class JSkatTabComponent extends JPanel {

	private static final long serialVersionUID = 1L;

	final JTabbedPane pane;

	/**
	 * Constructor
	 * 
	 * @param newPane
	 *            Tab pane
	 * @param bitmaps
	 *            JSkat bitmaps
	 */
	public JSkatTabComponent(final JTabbedPane newPane,
			JSkatGraphicRepository bitmaps) {

		// unset default FlowLayout' gaps
		super(new FlowLayout(FlowLayout.LEFT, 0, 0));

		if (newPane == null) {
			throw new IllegalArgumentException("TabbedPane is null"); //$NON-NLS-1$
		}
		this.pane = newPane;
		setOpaque(false);

		// make JLabel read titles from JTabbedPane
		JLabel label = new JLabel() {

			private static final long serialVersionUID = 1L;

			@Override
			public String getText() {
				int i = JSkatTabComponent.this.pane
						.indexOfTabComponent(JSkatTabComponent.this);
				if (i != -1) {
					return JSkatTabComponent.this.pane.getTitleAt(i);
				}
				return null;
			}
		};

		add(label);
		// add more space between the label and the button
		label.setBorder(BorderFactory.createEmptyBorder(0, 0, 0, 5));
		// tab button
		JButton button = new TabButton(bitmaps);
		add(button);
		// add more space to the top of the component
		setBorder(BorderFactory.createEmptyBorder(2, 0, 0, 0));
	}

	private class TabButton extends JButton implements ActionListener {

		private static final long serialVersionUID = 1L;

		JSkatGraphicRepository bitmaps;

		public TabButton(JSkatGraphicRepository newBitmaps) {

			this.bitmaps = newBitmaps;

			int size = 22;
			setPreferredSize(new Dimension(size, size));
			setToolTipText("close this tab");
			// Make the button looks the same for all Laf's
			setUI(new BasicButtonUI());
			// Make it transparent
			setContentAreaFilled(false);
			// No need to be focusable
			setFocusable(false);
			// Close the proper tab by clicking the button
			addActionListener(this);
		}

		@Override
		public void actionPerformed(ActionEvent e) {

			int i = JSkatTabComponent.this.pane
					.indexOfTabComponent(JSkatTabComponent.this);
			if (i != -1) {
				// FIXME: it could also be an ISS table
				JSkatEventBus.INSTANCE.post(new TableRemovedEvent(pane
						.getTitleAt(i), JSkatViewType.LOCAL_TABLE));
			}
		}

		// paint the cross
		@Override
		protected void paintComponent(Graphics g) {
			super.paintComponent(g);
			Graphics2D g2 = (Graphics2D) g.create();
			// shift the image for pressed buttons
			if (getModel().isPressed()) {
				g2.translate(1, 1);
			}
			g2.drawImage(this.bitmaps.getIconImage(Icon.CLOSE, IconSize.SMALL),
					null, null);
			g2.dispose();
		}
	}
}