/*
* org.openmicroscopy.shoola.util.ui.RotationIcon
*
*------------------------------------------------------------------------------
* Copyright (C) 2006-2012 University of Dundee & Open Microscopy Environment.
* All rights reserved.
*
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*------------------------------------------------------------------------------
*/
package org.openmicroscopy.shoola.util.ui;
//Java imports
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.geom.AffineTransform;
import javax.swing.Icon;
import javax.swing.JComponent;
import javax.swing.Timer;
//Third-party libraries
import org.jdesktop.swingx.JXBusyLabel;
//Application-internal dependencies
/**
* Rotates an icon
*
* @author Jean-Marie Burel
* <a href="mailto:j.burel@dundee.ac.uk">j.burel@dundee.ac.uk</a>
* @since Beta4.4
*/
public class RotationIcon
implements Icon
{
/** The default angle used to rotate the icon.*/
private static final double DEFAULT_ANGLE = 90;
/** The icon to rotate.*/
private Icon icon;
/** The time used to rotate the image.*/
private final Timer timer;
/** The angle used to rotate the image.*/
private double angle;
/**
* Creates a new instance.
*
* @param component The component of reference.
*/
public RotationIcon(final JComponent component)
{
this(null, component, false);
}
/**
* Creates a new instance.
*
* @param icon The icon to rotate.
* @param component The component of reference.
* @param start Pass <code>true</code> to start the timer,
* <code>false</code> otherwise.
*/
public RotationIcon(Icon icon, final JComponent component, boolean start)
{
if (icon == null) {
JXBusyLabel label = new JXBusyLabel();
if (start) label.setBusy(true);
label.setSize(16, 16);
icon = label.getIcon();
}
this.icon = icon;
angle = DEFAULT_ANGLE;
//Create the timer.
timer = new Timer(100, new ActionListener() {
public void actionPerformed( ActionEvent e ) {
angle = angle+10;
if (angle == 360) angle = 0;
component.repaint();
}
} );
timer.setRepeats(false);
if (start) timer.start();
}
/** Stops the timer.*/
public void stopRotation() { timer.stop(); }
/** Stops the timer.*/
public void startRotation() { timer.start(); }
/**
* Returns the width of the icon to rotate.
* @see Icon#getIconWidth()
*/
public int getIconWidth() { return icon.getIconWidth(); }
/**
* Returns the height of the icon to rotate.
* @see Icon#getIconHeight()
*/
public int getIconHeight() { return icon.getIconHeight(); }
/**
* Paints the icon.
* @see Icon#paintIcon(Component, Graphics, int, int)
*/
public void paintIcon(Component c, Graphics g, int x, int y )
{
stopRotation();
Graphics2D g2 = (Graphics2D) g.create();
int w = icon.getIconWidth()/2;
int h = icon.getIconHeight()/2;
Rectangle r = new Rectangle(x, y, getIconWidth(), getIconHeight());
g2.setClip(r);
AffineTransform original = g2.getTransform();
AffineTransform at = new AffineTransform();
at.concatenate(original);
at.rotate(Math.toRadians(angle), x+w, y+h);
g2.setTransform(at);
icon.paintIcon(c, g2, x, y);
g2.setTransform(original);
startRotation();
}
}