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package test;
import java.awt.BorderLayout;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.FlavorEvent;
import java.awt.datatransfer.FlavorListener;
import java.awt.datatransfer.Transferable;
import java.awt.event.ActionEvent;
import java.awt.image.BufferedImage;
import java.io.File;
import java.util.List;
import javax.imageio.ImageIO;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JToolBar;
import javax.swing.SwingUtilities;
import javax.swing.TransferHandler;
public class Main {
private static BufferedImage toBufferedImage(Image image) {
if (image == null) {
return null;
} else if (image instanceof BufferedImage) {
return (BufferedImage) image;
}
BufferedImage result = new BufferedImage(image.getWidth(null), image.getHeight(null), BufferedImage.TYPE_INT_ARGB);
Graphics2D g = result.createGraphics();
try {
g.drawImage(image, 0, 0, null);
} finally {
g.dispose();
}
return result;
}
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
/**
* {@inheritDoc}
*/
@Override
public void run() {
JFrame frame = new JFrame("Test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
final ImageView imageView = new ImageView();
final Action pasteAction = new AbstractAction() {
/**
* {@inheritDoc}
*/
@Override
public void actionPerformed(ActionEvent e) {
System.out.println("Pasting image");
pasteImage(imageView);
}
};
pasteAction.putValue(Action.NAME, "Paste");
Toolkit toolkit = Toolkit.getDefaultToolkit();
JToolBar toolBar = new JToolBar();
toolBar.add(pasteAction);
frame.setLayout(new BorderLayout());
frame.add(toolBar, BorderLayout.NORTH);
frame.add(imageView, BorderLayout.CENTER);
frame.setSize(500, 500);
frame.setVisible(true);
Clipboard clipboard = toolkit.getSystemClipboard();
clipboard.addFlavorListener(new FlavorListener() {
/**
* {@inheritDoc}
*/
@Override
public void flavorsChanged(FlavorEvent e) {
System.out.println("Flavor changed in clipboard");
testEnableAction(pasteAction);
}
});
testEnableAction(pasteAction);
}
});
}
private static void pasteImage(ImageView imageView) {
try {
Toolkit toolkit = Toolkit.getDefaultToolkit();
Clipboard clipboard = toolkit.getSystemClipboard();
DataFlavor[] flavors = clipboard.getAvailableDataFlavors();
for (DataFlavor flavor : flavors) {
if (DataFlavor.imageFlavor.equals(flavor)) {
Image image = (Image) clipboard.getData(flavor);
imageView.image = toBufferedImage(image);
imageView.repaint();
break;
}
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
private static void testEnableAction(Action action) {
try {
Toolkit toolkit = Toolkit.getDefaultToolkit();
Clipboard clipboard = toolkit.getSystemClipboard();
action.setEnabled(false);
DataFlavor[] flavors = clipboard.getAvailableDataFlavors();
for (DataFlavor flavor : flavors) {
if (DataFlavor.imageFlavor.equals(flavor)) {
action.setEnabled(true);
break;
}
}
} // Ignore.
catch (IllegalStateException ex) {
}
}
private static class ImageView extends JComponent {
private DataFlavor[] supportedFlavors = {
DataFlavor.imageFlavor,
DataFlavor.javaFileListFlavor
};
BufferedImage image;
public ImageView() {
// Drag and drop - import support.
setTransferHandler(new TransferHandler() {
/**
* {@inheritDoc}
*/
@Override
public boolean canImport(TransferSupport support) {
DataFlavor[] flavors = support.getDataFlavors();
boolean result = false;
for (DataFlavor flavor : flavors) {
for (DataFlavor supportedFlavor : supportedFlavors) {
if (supportedFlavor.equals(flavor)) {
result = true;
break;
}
}
if (result) {
break;
}
}
return result;
}
/**
* {@inheritDoc}
*/
@Override
public boolean importData(TransferSupport support) {
boolean result = false;
try {
Transferable transferable = support.getTransferable();
for (DataFlavor supportedFlavor : supportedFlavors) {
if (transferable.isDataFlavorSupported(supportedFlavor)) {
Object data = transferable.getTransferData(supportedFlavor);
if (DataFlavor.imageFlavor.equals(supportedFlavor)) {
System.out.println("Image drag and drop");
image = toBufferedImage((Image) data);
repaint();
break;
} else {// if (DataFlavor.imageFlavor.equals(javaFileListFlavor)) {
System.out.println("File drag and drop");
List<File> files = (List<File>) data;
System.out.println("There are "+files.size()+" files being dragged.");
for (File file : files) {
try {
image = ImageIO.read(file);
repaint();
break;
} catch (Exception ex2) {
System.err.println("\"" + file.getAbsolutePath() + "\" is not an image file.");
}
}
}
result = true;
}
}
} catch (Exception ex) {
ex.printStackTrace();
}
return result;
}
});
}
/**
* {@inheritDoc}
*/
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
if (image != null) {
g.drawImage(image, 0, 0, null);
}
}
}
} |
Reccupere presse papier d'image (Applet ou Swing)
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