Re: Image to ClipBoard (linux)

From:

rossum <rossum48@coldmail.com>

Newsgroups:

comp.lang.java.help

Date:

Fri, 03 Jun 2011 00:28:35 +0100

Message-ID:

<ll6gu69d0cgtettlk465l4979kvcbhrv41@4ax.com>

On 02 Jun 2011 22:30:55 GMT, ricoh51 <ricoh51@free.fr> wrote:

On Thu, 02 Jun 2011 23:05:33 +0100, rossum wrote:

On 02 Jun 2011 19:35:01 GMT, ricoh51 <ricoh51@free.fr> wrote:

     public void copyToClipboard(){
        Clipboard clipboard = Toolkit.getDefaultToolkit
().getSystemClipboard();
        ImageTransferable selection = new ImageTransferable
(image);
        clipboard.setContents(selection, null);

I am not sure if it is causing your problem, but in my clipboard code I
set the owner parameter here to 'this', not to 'null'.

but setContents needs a :
java.awt.datatransfer.Transferable,java.awt.datatransfer.ClipboardOwner
and "this" is not a ClipboardOwner in my example.
Do you have a minimal example?

Best Regards

eric

What I have is a very simple utility class that I use to protect
myself from the full horror of the Java clipboard. It is text only
though, not images. If you get yours working I will probably add
that.

Careful with the line wrap, this is as written and not reformatted for
usenet.

rossum

// *** Code starts ***

import java.awt.Toolkit;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.ClipboardOwner;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.StringSelection;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.io.IOException;

/**
* a simple interface with the Windows clipboard.
*
* @author Martin Ross
*/
public class MyClipBoard implements ClipboardOwner {

    public MyClipBoard() {}

    /**
     * no action taken or needed. Required as part of the
ClipboardOwner Interface.
     */
    public void lostOwnership(Clipboard clipboard, Transferable
contents) {
        // No action required.
    }

    /**
     * adds some text to the clipboard.
     *
     * @param text the text to copy to the clipboard.
     */
    public void setText(String text) {
        StringSelection ssText = new StringSelection(text);
        Clipboard clipboard =
Toolkit.getDefaultToolkit().getSystemClipboard();
        clipboard.setContents(ssText, this);
    } // end setText()

    /**
     * clears the clipboard.
     */
    public void clear() {
        Clipboard clipboard =
Toolkit.getDefaultToolkit().getSystemClipboard();
        clipboard.setContents(null, this);
    } // end clear()

    /**
     * retrieves text from the clipboard.
     *
     * @return the text retrieved from the clipboard or the empty
string.
     *
     * @throws java.lang.IOException if the clipboard holds the wrong
type of data.
     * @throws java.lang.IOException if there was an error accessing
the clipboard.
     */
    public String getText() throws IOException {
        String result = "";
        Clipboard clipboard =
Toolkit.getDefaultToolkit().getSystemClipboard();
        Transferable contents = clipboard.getContents(null);
        boolean hasTransferableText = (contents != null) &&
            contents.isDataFlavorSupported(DataFlavor.stringFlavor);
        if ( hasTransferableText ) {
            try {
                result = (String)
contents.getTransferData(DataFlavor.stringFlavor);
            } catch (UnsupportedFlavorException ufe) {
                throw new IOException("MyClipBoard.getText: text data
not supported.", ufe);
            } catch (IOException ioe) {
                throw new IOException("MyClipBoard.getText: clipboard
unavailable.", ioe);
            } // end try/catch
        } // end if
        return result;
    } // end getText()

} // end class MyClipBoard