Sending Image Objects through the Clipboard : Clip Board « Development Class « Java

1. Java
2. Development Class
3. Clip Board

Sending Image Objects through the Clipboard

 
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Image;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;

import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.TransferHandler;

public class ClipImage {

  public static void main(String args[]) {

    JFrame frame = new JFrame("Clip Image");
    Container contentPane = frame.getContentPane();

    final Clipboard clipboard = frame.getToolkit().getSystemClipboard();

    Icon icon = new ImageIcon("jaeger.jpg");
    final JLabel label = new JLabel(icon);
    label.setTransferHandler(new ImageSelection());

    JScrollPane pane = new JScrollPane(label);
    contentPane.add(pane, BorderLayout.CENTER);

    JButton copy = new JButton("Copy");
    copy.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        TransferHandler handler = label.getTransferHandler();
        handler.exportToClipboard(label, clipboard,
            TransferHandler.COPY);
      }
    });

    JButton clear = new JButton("Clear");
    clear.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent actionEvent) {
        label.setIcon(null);
      }
    });

    JButton paste = new JButton("Paste");
    paste.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent actionEvent) {
        Transferable clipData = clipboard.getContents(clipboard);
        if (clipData != null) {
          if (clipData.isDataFlavorSupported(DataFlavor.imageFlavor)) {
            TransferHandler handler = label.getTransferHandler();
            handler.importData(label, clipData);
          }
        }
      }
    });

    JPanel p = new JPanel();
    p.add(copy);
    p.add(clear);
    p.add(paste);
    contentPane.add(p, BorderLayout.SOUTH);
    frame.setSize(300, 300);
    frame.show();
  }
}

class ImageSelection extends TransferHandler implements Transferable {

  private static final DataFlavor flavors[] = { DataFlavor.imageFlavor };

  private JLabel source;

  private Image image;

  public int getSourceActions(JComponent c) {
    return TransferHandler.COPY;
  }

  public boolean canImport(JComponent comp, DataFlavor flavor[]) {
    if (!(comp instanceof JLabel)) {
      return false;
    }
    for (int i = 0, n = flavor.length; i < n; i++) {
      for (int j = 0, m = flavors.length; j < m; j++) {
        if (flavor[i].equals(flavors[j])) {
          return true;
        }
      }
    }
    return false;
  }

  public Transferable createTransferable(JComponent comp) {
    // Clear
    source = null;
    image = null;

    if (comp instanceof JLabel) {
      JLabel label = (JLabel) comp;
      Icon icon = label.getIcon();
      if (icon instanceof ImageIcon) {
        image = ((ImageIcon) icon).getImage();
        source = label;
        return this;
      }
    }
    return null;
  }

  public boolean importData(JComponent comp, Transferable t) {
    if (comp instanceof JLabel) {
      JLabel label = (JLabel) comp;
      if (t.isDataFlavorSupported(flavors[0])) {
        try {
          image = (Image) t.getTransferData(flavors[0]);
          ImageIcon icon = new ImageIcon(image);
          label.setIcon(icon);
          return true;
        } catch (UnsupportedFlavorException ignored) {
        } catch (IOException ignored) {
        }
      }
    }
    return false;
  }

  // Transferable
  public Object getTransferData(DataFlavor flavor) {
    if (isDataFlavorSupported(flavor)) {
      return image;
    }
    return null;
  }

  public DataFlavor[] getTransferDataFlavors() {
    return flavors;
  }

  public boolean isDataFlavorSupported(DataFlavor flavor) {
    return flavor.equals(DataFlavor.imageFlavor);
  }
}


           
         
  

Related examples in the same category

1.	Using the clipboard
2.	Communicating with the System Clipboard
3.	Placing text on the computer clipboard
4.	Getting data from the computer clipboard
5.	Get string value from clipboard
6.	Write a string to the system clipboard
7.	Getting and Setting an Image on the System Clipboard
8.	Setting an image on the clipboard with a custom Transferable object to hold the image
9.	Determining When an Item Is No Longer on the System Clipboard
10.	implements ClipboardOwner
11.	Copying data to system clipboard
12.	Taken from the Sun documentation on Clipboard API