ImageReaderBase.java
/*
* Copyright (c) 2008, Harald Kuhr
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* * Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.twelvemonkeys.imageio;
import com.twelvemonkeys.image.BufferedImageIcon;
import com.twelvemonkeys.image.ImageUtil;
import com.twelvemonkeys.imageio.util.IIOUtil;
import javax.imageio.*;
import javax.imageio.metadata.IIOMetadata;
import javax.imageio.spi.ImageReaderSpi;
import javax.imageio.stream.ImageInputStream;
import javax.swing.*;
import java.awt.*;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import java.awt.image.IndexColorModel;
import java.io.File;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.Arrays;
import java.util.Iterator;
/**
* Abstract base class for image readers.
*
* @author <a href="mailto:harald.kuhr@gmail.com">Harald Kuhr</a>
* @author last modified by $Author: haraldk$
* @version $Id: ImageReaderBase.java,v 1.0 Sep 20, 2007 5:28:37 PM haraldk Exp$
*/
public abstract class ImageReaderBase extends ImageReader {
private static final Point ORIGIN = new Point(0, 0);
/**
* For convenience. Only set if the input is an {@code ImageInputStream}.
* @see #setInput(Object, boolean, boolean)
*/
protected ImageInputStream imageInput;
/**
* Constructs an {@code ImageReader} and sets its
* {@code originatingProvider} field to the supplied value.
* <p>
* Subclasses that make use of extensions should provide a
* constructor with signature {@code (ImageReaderSpi,
* Object)} in order to retrieve the extension object. If
* the extension object is unsuitable, an
* {@code IllegalArgumentException} should be thrown.
* </p>
*
* @param provider the {@code ImageReaderSpi} that is invoking this constructor, or {@code null}.
*/
protected ImageReaderBase(final ImageReaderSpi provider) {
super(provider);
}
/**
* Overrides {@code setInput}, to allow easy access to the input, in case
* it is an {@code ImageInputStream}.
*
* @param input the {@code ImageInputStream} or other
* {@code Object} to use for future decoding.
* @param seekForwardOnly if {@code true}, images and metadata
* may only be read in ascending order from this input source.
* @param ignoreMetadata if {@code true}, metadata
* may be ignored during reads.
*
* @exception IllegalArgumentException if {@code input} is
* not an instance of one of the classes returned by the
* originating service provider's {@code getInputTypes}
* method, or is not an {@code ImageInputStream}.
*
* @see ImageInputStream
*/
@Override
public void setInput(final Object input, final boolean seekForwardOnly, final boolean ignoreMetadata) {
resetMembers();
super.setInput(input, seekForwardOnly, ignoreMetadata);
if (input instanceof ImageInputStream) {
imageInput = (ImageInputStream) input;
}
else {
imageInput = null;
}
}
@Override
public void dispose() {
resetMembers();
super.dispose();
}
@Override
public void reset() {
resetMembers();
super.reset();
}
/**
* Resets all member variables. This method is by default invoked from:
* <ul>
* <li>{@link #setInput(Object, boolean, boolean)}</li>
* <li>{@link #dispose()}</li>
* <li>{@link #reset()}</li>
* </ul>
*
*/
protected abstract void resetMembers();
/**
* Default implementation that always returns {@code null}.
*
* @param imageIndex ignored, unless overridden
* @return {@code null}, unless overridden
* @throws IOException never, unless overridden.
*/
public IIOMetadata getImageMetadata(int imageIndex) throws IOException {
return null;
}
/**
* Default implementation that always returns {@code null}.
*
* @return {@code null}, unless overridden
* @throws IOException never, unless overridden.
*/
public IIOMetadata getStreamMetadata() throws IOException {
return null;
}
/**
* Default implementation that always returns {@code 1}.
*
* @param allowSearch ignored, unless overridden
* @return {@code 1}, unless overridden
* @throws IOException never, unless overridden
*/
public int getNumImages(boolean allowSearch) throws IOException {
assertInput();
return 1;
}
/**
* Convenience method to make sure image index is within bounds.
*
* @param index the image index
*
* @throws java.io.IOException if an error occurs during reading
* @throws IndexOutOfBoundsException if not {@code minIndex <= index < numImages}
*/
protected void checkBounds(int index) throws IOException {
assertInput();
if (index < getMinIndex()) {
throw new IndexOutOfBoundsException("index < minIndex");
}
int numImages = getNumImages(false);
if (numImages != -1 && index >= numImages) {
throw new IndexOutOfBoundsException("index >= numImages (" + index + " >= " + numImages + ")");
}
}
/**
* Makes sure input is set.
*
* @throws IllegalStateException if {@code getInput() == null}.
*/
protected void assertInput() {
if (getInput() == null) {
throw new IllegalStateException("getInput() == null");
}
}
/**
* Returns the {@code BufferedImage} to which decoded pixel data should be written.
* <p>
* As {@link javax.imageio.ImageReader#getDestination} but tests if the explicit destination
* image (if set) is valid according to the {@code ImageTypeSpecifier}s given in {@code types}.
* </p>
*
* @param param an {@code ImageReadParam} to be used to get
* the destination image or image type, or {@code null}.
* @param types an {@code Iterator} of
* {@code ImageTypeSpecifier}s indicating the legal image
* types, with the default first.
* @param width the true width of the image or tile begin decoded.
* @param height the true width of the image or tile being decoded.
*
* @return the {@code BufferedImage} to which decoded pixel
* data should be written.
*
* @exception javax.imageio.IIOException if the {@code ImageTypeSpecifier} or {@code BufferedImage}
* specified by {@code param} does not match any of the legal
* ones from {@code types}.
* @throws IllegalArgumentException if {@code types}
* is {@code null} or empty, or if an object not of type
* {@code ImageTypeSpecifier} is retrieved from it.
* Or, if the resulting image would have a width or height less than 1,
* or if the product of {@code width} and {@code height} of the resulting image is greater than
* {@code Integer.MAX_VALUE}.
*/
public static BufferedImage getDestination(final ImageReadParam param, final Iterator<ImageTypeSpecifier> types,
final int width, final int height) throws IIOException {
// Adapted from http://java.net/jira/secure/attachment/29712/TIFFImageReader.java.patch,
// to allow reading parts/tiles of huge images.
if (types == null || !types.hasNext()) {
throw new IllegalArgumentException("imageTypes null or empty!");
}
ImageTypeSpecifier imageType = null;
// If param is non-null, use it
if (param != null) {
// Try to get the explicit destination image
BufferedImage dest = param.getDestination();
if (dest != null) {
boolean found = false;
while (types.hasNext()) {
ImageTypeSpecifier specifier = types.next();
int bufferedImageType = specifier.getBufferedImageType();
if (bufferedImageType != 0 && bufferedImageType == dest.getType()) {
// Known types equal, perfect match
found = true;
break;
}
else {
// If types are different, or TYPE_CUSTOM, test if
// - transferType is ok
// - bands are ok
// TODO: Test if color model is ok?
if (specifier.getSampleModel().getTransferType() == dest.getSampleModel().getTransferType()
&& Arrays.equals(specifier.getSampleModel().getSampleSize(), dest.getSampleModel().getSampleSize())
&& specifier.getNumBands() <= dest.getSampleModel().getNumBands()) {
found = true;
break;
}
}
}
if (!found) {
throw new IIOException(String.format("Destination image from ImageReadParam does not match legal imageTypes from reader: %s", dest));
}
return dest;
}
// No image, get the image type
imageType = param.getDestinationType();
}
// No info from param, use fallback image type
if (imageType == null) {
imageType = types.next();
}
else {
boolean foundIt = false;
while (types.hasNext()) {
ImageTypeSpecifier type = types.next();
if (type.equals(imageType)) {
foundIt = true;
break;
}
}
if (!foundIt) {
throw new IIOException(String.format("Destination type from ImageReadParam does not match legal imageTypes from reader: %s", imageType));
}
}
Rectangle srcRegion = new Rectangle(0, 0, 0, 0);
Rectangle destRegion = new Rectangle(0, 0, 0, 0);
computeRegions(param, width, height, null, srcRegion, destRegion);
int destWidth = destRegion.x + destRegion.width;
int destHeight = destRegion.y + destRegion.height;
long dimension = (long) destWidth * destHeight;
if (dimension > Integer.MAX_VALUE) {
throw new IIOException(String.format("destination width * height > Integer.MAX_VALUE: %d", dimension));
}
long size = dimension * imageType.getSampleModel().getNumDataElements();
if (size > Integer.MAX_VALUE) {
throw new IIOException(String.format("destination width * height * samplesPerPixel > Integer.MAX_VALUE: %d", size));
}
// Create a new image based on the type specifier
return imageType.createBufferedImage(destWidth, destHeight);
}
/**
* Utility method for getting the area of interest (AOI) of an image.
* The AOI is defined by the {@link javax.imageio.IIOParam#setSourceRegion(java.awt.Rectangle)}
* method.
* <p>
* Note: If it is possible for the reader to read the AOI directly, such a
* method should be used instead, for efficiency.
* </p>
*
* @param pImage the image to get AOI from
* @param pParam the param optionally specifying the AOI
*
* @return a {@code BufferedImage} containing the area of interest (source
* region), or the original image, if no source region was set, or
* {@code pParam} was {@code null}
*/
protected static BufferedImage fakeAOI(BufferedImage pImage, ImageReadParam pParam) {
return IIOUtil.fakeAOI(pImage, getSourceRegion(pParam, pImage.getWidth(), pImage.getHeight()));
}
/**
* Utility method for getting the subsampled image.
* The subsampling is defined by the
* {@link javax.imageio.IIOParam#setSourceSubsampling(int, int, int, int)}
* method.
* <p>
* NOTE: This method does not take the subsampling offsets into
* consideration.
* </p>
* <p>
* Note: If it is possible for the reader to subsample directly, such a
* method should be used instead, for efficiency.
* </p>
*
* @param pImage the image to subsample
* @param pParam the param optionally specifying subsampling
*
* @return an {@code Image} containing the subsampled image, or the
* original image, if no subsampling was specified, or
* {@code pParam} was {@code null}
*/
protected static Image fakeSubsampling(Image pImage, ImageReadParam pParam) {
return IIOUtil.fakeSubsampling(pImage, pParam);
}
/**
* Tests if param has explicit destination.
*
* @param pParam the image read parameter, or {@code null}
* @return true if {@code pParam} is non-{@code null} and either its {@code getDestination},
* {@code getDestinationType} returns a non-{@code null} value,
* or {@code getDestinationOffset} returns a {@link Point} that is not the upper left corner {@code (0, 0)}.
*/
protected static boolean hasExplicitDestination(final ImageReadParam pParam) {
return pParam != null &&
(
pParam.getDestination() != null || pParam.getDestinationType() != null ||
!ORIGIN.equals(pParam.getDestinationOffset())
);
}
public static void main(String[] pArgs) throws IOException {
BufferedImage image = ImageIO.read(new File(pArgs[0]));
if (image == null) {
System.err.println("Supported formats: " + Arrays.toString(IIOUtil.getNormalizedReaderFormatNames()));
System.exit(1);
}
showIt(image, pArgs[0]);
}
protected static void showIt(final BufferedImage pImage, final String pTitle) {
try {
SwingUtilities.invokeAndWait(new Runnable() {
public void run() {
JFrame frame = new JFrame(pTitle);
frame.getRootPane().getActionMap().put("window-close", new AbstractAction() {
public void actionPerformed(ActionEvent e) {
Window window = SwingUtilities.getWindowAncestor((Component) e.getSource());
window.setVisible(false);
window.dispose();
}
});
frame.getRootPane().getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_W, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()), "window-close");
frame.addWindowListener(new ExitIfNoWindowPresentHandler());
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.setLocationByPlatform(true);
JPanel pane = new JPanel(new BorderLayout());
JScrollPane scroll = new JScrollPane(pImage != null ? new ImageLabel(pImage) : new JLabel("(no image data)", JLabel.CENTER));
scroll.setBorder(null);
pane.add(scroll);
frame.setContentPane(pane);
frame.pack();
frame.setVisible(true);
}
});
}
catch (InterruptedException e) {
Thread.currentThread().interrupt();
}
catch (InvocationTargetException e) {
if (e.getCause() instanceof RuntimeException) {
throw (RuntimeException) e.getCause();
}
throw new RuntimeException(e);
}
}
private static class ImageLabel extends JLabel {
static final String ZOOM_IN = "zoom-in";
static final String ZOOM_OUT = "zoom-out";
static final String ZOOM_ACTUAL = "zoom-actual";
static final String ZOOM_FIT = "zoom-fit";
private BufferedImage image;
Paint backgroundPaint;
final Paint checkeredBG;
final Color defaultBG;
public ImageLabel(final BufferedImage pImage) {
super(new BufferedImageIcon(pImage));
setOpaque(false);
setCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR));
image = pImage;
checkeredBG = createTexture();
// For indexed color, default to the color of the transparent pixel, if any
defaultBG = getDefaultBackground(pImage);
backgroundPaint = defaultBG != null ? defaultBG : checkeredBG;
setupActions();
setComponentPopupMenu(createPopupMenu());
addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
if (e.isPopupTrigger()) {
getComponentPopupMenu().show(ImageLabel.this, e.getX(), e.getY());
}
}
});
setTransferHandler(new TransferHandler() {
@Override
public int getSourceActions(JComponent c) {
return COPY;
}
@Override
protected Transferable createTransferable(JComponent c) {
return new ImageTransferable(image);
}
@Override
public boolean importData(JComponent comp, Transferable t) {
if (canImport(comp, t.getTransferDataFlavors())) {
try {
Image transferData = (Image) t.getTransferData(DataFlavor.imageFlavor);
image = ImageUtil.toBuffered(transferData);
setIcon(new BufferedImageIcon(image));
return true;
}
catch (UnsupportedFlavorException | IOException ignore) {
}
}
return false;
}
@Override
public boolean canImport(JComponent comp, DataFlavor[] transferFlavors) {
for (DataFlavor flavor : transferFlavors) {
if (flavor.equals(DataFlavor.imageFlavor)) {
return true;
}
}
return false;
}
});
}
private void setupActions() {
// Mac weirdness... VK_MINUS/VK_PLUS seems to map to english key map always...
bindAction(new ZoomAction("Zoom in", 2), ZOOM_IN,
KeyStroke.getKeyStroke('+'),
KeyStroke.getKeyStroke(KeyEvent.VK_PLUS, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()),
KeyStroke.getKeyStroke(KeyEvent.VK_ADD, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()));
bindAction(new ZoomAction("Zoom out", .5), ZOOM_OUT,
KeyStroke.getKeyStroke('-'),
KeyStroke.getKeyStroke(KeyEvent.VK_MINUS, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()),
KeyStroke.getKeyStroke(KeyEvent.VK_SUBTRACT, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()));
bindAction(new ZoomAction("Zoom actual"), ZOOM_ACTUAL,
KeyStroke.getKeyStroke('0'),
KeyStroke.getKeyStroke(KeyEvent.VK_0, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()));
bindAction(new ZoomToFitAction("Zoom fit"), ZOOM_FIT,
KeyStroke.getKeyStroke('9'),
KeyStroke.getKeyStroke(KeyEvent.VK_9, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()));
bindAction(TransferHandler.getCopyAction(), (String) TransferHandler.getCopyAction().getValue(Action.NAME), KeyStroke.getKeyStroke(KeyEvent.VK_C, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()));
bindAction(TransferHandler.getPasteAction(), (String) TransferHandler.getPasteAction().getValue(Action.NAME), KeyStroke.getKeyStroke(KeyEvent.VK_V, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()));
}
private void bindAction(final Action action, final String key, final KeyStroke... keyStrokes) {
for (KeyStroke keyStroke : keyStrokes) {
getInputMap(WHEN_IN_FOCUSED_WINDOW).put(keyStroke, key);
}
getActionMap().put(key, action);
}
private JPopupMenu createPopupMenu() {
JPopupMenu popup = new JPopupMenu();
popup.add(getActionMap().get(ZOOM_FIT));
popup.add(getActionMap().get(ZOOM_ACTUAL));
popup.add(getActionMap().get(ZOOM_IN));
popup.add(getActionMap().get(ZOOM_OUT));
popup.addSeparator();
ButtonGroup group = new ButtonGroup();
JMenu background = new JMenu("Background");
popup.add(background);
ChangeBackgroundAction checkered = new ChangeBackgroundAction("Checkered", checkeredBG);
checkered.putValue(Action.SELECTED_KEY, backgroundPaint == checkeredBG);
addCheckBoxItem(checkered, background, group);
background.addSeparator();
addCheckBoxItem(new ChangeBackgroundAction("White", Color.WHITE), background, group);
addCheckBoxItem(new ChangeBackgroundAction("Light", Color.LIGHT_GRAY), background, group);
addCheckBoxItem(new ChangeBackgroundAction("Gray", Color.GRAY), background, group);
addCheckBoxItem(new ChangeBackgroundAction("Dark", Color.DARK_GRAY), background, group);
addCheckBoxItem(new ChangeBackgroundAction("Black", Color.BLACK), background, group);
background.addSeparator();
ChooseBackgroundAction chooseBackgroundAction = new ChooseBackgroundAction("Choose...", defaultBG != null ? defaultBG : new Color(0xFF6600));
chooseBackgroundAction.putValue(Action.SELECTED_KEY, backgroundPaint == defaultBG);
addCheckBoxItem(chooseBackgroundAction, background, group);
return popup;
}
private void addCheckBoxItem(final Action pAction, final JMenu pPopup, final ButtonGroup pGroup) {
JCheckBoxMenuItem item = new JCheckBoxMenuItem(pAction);
pGroup.add(item);
pPopup.add(item);
}
private static Color getDefaultBackground(BufferedImage pImage) {
if (pImage.getColorModel() instanceof IndexColorModel) {
IndexColorModel cm = (IndexColorModel) pImage.getColorModel();
int transparent = cm.getTransparentPixel();
if (transparent >= 0) {
return new Color(cm.getRGB(transparent), false);
}
}
return null;
}
private static Paint createTexture() {
GraphicsConfiguration graphicsConfiguration = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getDefaultConfiguration();
BufferedImage pattern = graphicsConfiguration.createCompatibleImage(20, 20);
Graphics2D g = pattern.createGraphics();
try {
g.setColor(Color.LIGHT_GRAY);
g.fillRect(0, 0, pattern.getWidth(), pattern.getHeight());
g.setColor(Color.GRAY);
g.fillRect(0, 0, pattern.getWidth() / 2, pattern.getHeight() / 2);
g.fillRect(pattern.getWidth() / 2, pattern.getHeight() / 2, pattern.getWidth() / 2, pattern.getHeight() / 2);
}
finally {
g.dispose();
}
return new TexturePaint(pattern, new Rectangle(pattern.getWidth(), pattern.getHeight()));
}
@Override
protected void paintComponent(Graphics g) {
Graphics2D gr = (Graphics2D) g;
gr.setPaint(backgroundPaint);
gr.fillRect(0, 0, getWidth(), getHeight());
super.paintComponent(g);
}
private class ChangeBackgroundAction extends AbstractAction {
protected Paint paint;
public ChangeBackgroundAction(final String pName, final Paint pPaint) {
super(pName);
paint = pPaint;
}
public void actionPerformed(ActionEvent e) {
backgroundPaint = paint;
repaint();
}
}
private class ChooseBackgroundAction extends ChangeBackgroundAction {
public ChooseBackgroundAction(final String pName, final Color pColor) {
super(pName, pColor);
putValue(Action.SMALL_ICON, new Icon() {
public void paintIcon(Component c, Graphics pGraphics, int x, int y) {
Graphics g = pGraphics.create();
g.setColor((Color) paint);
g.fillRect(x, y, 16, 16);
g.dispose();
}
public int getIconWidth() {
return 16;
}
public int getIconHeight() {
return 16;
}
});
}
@Override
public void actionPerformed(ActionEvent e) {
Color selected = JColorChooser.showDialog(ImageLabel.this, "Choose background", (Color) paint);
if (selected != null) {
paint = selected;
super.actionPerformed(e);
}
}
}
private class ZoomAction extends AbstractAction {
private final double zoomFactor;
public ZoomAction(final String name, final double zoomFactor) {
super(name);
this.zoomFactor = zoomFactor;
}
public ZoomAction(final String name) {
this(name, 0);
}
public void actionPerformed(final ActionEvent e) {
if (zoomFactor <= 0) {
setIcon(new BufferedImageIcon(image));
}
else {
Icon current = getIcon();
int w = Math.max(Math.min((int) (current.getIconWidth() * zoomFactor), image.getWidth() * 16), image.getWidth() / 16);
int h = Math.max(Math.min((int) (current.getIconHeight() * zoomFactor), image.getHeight() * 16), image.getHeight() / 16);
setIcon(new BufferedImageIcon(image, Math.max(w, 2), Math.max(h, 2), w > image.getWidth() || h > image.getHeight()));
}
}
}
private class ZoomToFitAction extends ZoomAction {
public ZoomToFitAction(final String name) {
super(name, -1);
}
public void actionPerformed(final ActionEvent e) {
JComponent source = (JComponent) e.getSource();
if (source instanceof JMenuItem) {
JPopupMenu menu = (JPopupMenu) SwingUtilities.getAncestorOfClass(JPopupMenu.class, source);
source = (JComponent) menu.getInvoker();
}
Container container = SwingUtilities.getAncestorOfClass(JViewport.class, source);
double ratioX = container.getWidth() / (double) image.getWidth();
double ratioY = container.getHeight() / (double) image.getHeight();
double zoomFactor = Math.min(ratioX, ratioY);
int w = Math.max(Math.min((int) (image.getWidth() * zoomFactor), image.getWidth() * 16), image.getWidth() / 16);
int h = Math.max(Math.min((int) (image.getHeight() * zoomFactor), image.getHeight() * 16), image.getHeight() / 16);
setIcon(new BufferedImageIcon(image, w, h, zoomFactor > 1));
}
}
private static class ImageTransferable implements Transferable {
private final BufferedImage image;
public ImageTransferable(final BufferedImage image) {
this.image = image;
}
@Override
public DataFlavor[] getTransferDataFlavors() {
return new DataFlavor[] {DataFlavor.imageFlavor};
}
@Override
public boolean isDataFlavorSupported(final DataFlavor flavor) {
return DataFlavor.imageFlavor.equals(flavor);
}
@Override
public Object getTransferData(final DataFlavor flavor) throws UnsupportedFlavorException {
if (isDataFlavorSupported(flavor)) {
return image;
}
throw new UnsupportedFlavorException(flavor);
}
}
}
private static class ExitIfNoWindowPresentHandler extends WindowAdapter {
@Override
public void windowClosed(final WindowEvent e) {
Window[] windows = Window.getWindows();
if (windows == null || windows.length == 0) {
System.exit(0);
}
}
}
}