/*
 * Copyright © 2010 Keith Packard <keithp@keithp.com>
 *
 * This program 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 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
 */

package org.altusmetrum.altosuilib_14;

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public abstract class AltosDeviceDialog extends AltosUIDialog implements ActionListener {

	private AltosDevice		value;
	private JList<AltosDevice>	list;
	private JButton			cancel_button;
	private JButton			select_button;
	public Frame			frame;
	public int			product;
	public JPanel			buttonPane;
	private Timer			timer;
	AltosDevice[]			devices;

	public AltosDevice getValue() {
		return value;
	}

	public abstract AltosDevice[] devices();

	public void update_devices() {
		AltosDevice selected = list.getSelectedValue();

		devices = devices();
		list.setListData(devices);
		for (AltosDevice d : devices) {
			if (d.equals(selected)) {
				list.setSelectedValue(d, true);
				break;
			}
		}
		select_button.setEnabled(devices.length > 0);
	}

	public void add_bluetooth() { }

	public AltosDeviceDialog (Frame in_frame, Component location, int in_product) {
		super(in_frame, "Device Selection", true);

		product = in_product;
		frame = in_frame;
		value = null;

		cancel_button = new JButton("Cancel");
		cancel_button.setActionCommand("cancel");
		cancel_button.addActionListener(this);

		select_button = new JButton("Select");
		select_button.setActionCommand("select");
		select_button.addActionListener(this);
		select_button.setEnabled(false);
		getRootPane().setDefaultButton(select_button);

		list = new JList<AltosDevice>(devices) {
				//Subclass JList to workaround bug 4832765, which can cause the
				//scroll pane to not let the user easily scroll up to the beginning
				//of the list.  An alternative would be to set the unitIncrement
				//of the JScrollBar to a fixed value. You wouldn't get the nice
				//aligned scrolling, but it should work.
				public int getScrollableUnitIncrement(Rectangle visibleRect,
								      int orientation,
								      int direction) {
					int row;
					if (orientation == SwingConstants.VERTICAL &&
					    direction < 0 && (row = getFirstVisibleIndex()) != -1) {
						Rectangle r = getCellBounds(row, row);
						if ((r.y == visibleRect.y) && (row != 0))  {
							Point loc = r.getLocation();
							loc.y--;
							int prevIndex = locationToIndex(loc);
							Rectangle prevR = getCellBounds(prevIndex, prevIndex);

							if (prevR == null || prevR.y >= r.y) {
								return 0;
							}
							return prevR.height;
						}
					}
					return super.getScrollableUnitIncrement(
						visibleRect, orientation, direction);
				}
			};

		list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
		list.setLayoutOrientation(JList.HORIZONTAL_WRAP);
		list.setVisibleRowCount(-1);
		list.addMouseListener(new MouseAdapter() {
				 public void mouseClicked(MouseEvent e) {
					 if (e.getClickCount() == 2) {
						 select_button.doClick(); //emulate button click
					 }
				 }
			});
		JScrollPane listScroller = new JScrollPane(list);
		listScroller.setPreferredSize(new Dimension(400, 80));
		listScroller.setAlignmentX(LEFT_ALIGNMENT);

		//Create a container so that we can add a title around
		//the scroll pane.  Can't add a title directly to the
		//scroll pane because its background would be white.
		//Lay out the label and scroll pane from top to bottom.
		JPanel listPane = new JPanel();
		listPane.setLayout(new BoxLayout(listPane, BoxLayout.PAGE_AXIS));

		JLabel label = new JLabel("Select Device");
		label.setLabelFor(list);
		listPane.add(label);
		listPane.add(Box.createRigidArea(new Dimension(0,5)));
		listPane.add(listScroller);
		listPane.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));

		//Lay out the buttons from left to right.
		buttonPane = new JPanel();
		buttonPane.setLayout(new BoxLayout(buttonPane, BoxLayout.LINE_AXIS));
		buttonPane.setBorder(BorderFactory.createEmptyBorder(0, 10, 10, 10));
		buttonPane.add(Box.createHorizontalGlue());
		buttonPane.add(cancel_button);
		buttonPane.add(Box.createRigidArea(new Dimension(10, 0)));

		if (AltosUILib.has_bluetooth)
			add_bluetooth();

		buttonPane.add(select_button);

		//Put everything together, using the content pane's BorderLayout.
		Container contentPane = getContentPane();
		contentPane.add(listPane, BorderLayout.CENTER);
		contentPane.add(buttonPane, BorderLayout.PAGE_END);

		//Initialize values.
		update_devices();
		if (devices != null && devices.length != 0)
			list.setSelectedValue(devices[0], true);
		pack();
		setLocationRelativeTo(location);

		timer = new Timer(1000, new ActionListener () {
				public void actionPerformed(ActionEvent evt) {
					update_devices();
				}
			});

		addComponentListener(new ComponentListener() {
				public void componentShown(ComponentEvent e) {
					timer.start();
				}
				public void componentMoved(ComponentEvent e) {
				}
				public void componentResized(ComponentEvent e) {
				}
				public void componentHidden(ComponentEvent e) {
					timer.stop();
				}
			});

	}

	//Handle clicks on the Set and Cancel buttons.
	public void actionPerformed(ActionEvent e) {
		if ("select".equals(e.getActionCommand())) {
			value = (AltosDevice)(list.getSelectedValue());
			setVisible(false);
		}
		if ("cancel".equals(e.getActionCommand()))
			setVisible(false);
	}

}