Drag and drop icons

hello world....
in the process of learning i'm trying to create a small java app that resizes and processes graphics, (using imagemagick api).
what i'd like to be able to do is drag the icon (or shortcut) to my java app and then have the app process that, just as a windows app would do. in fact all i need really is the location of the file the user has dragged and dropped onto my app, although it would be nice if i could indicate somewhere that the file was being processed!
i understand the use of the drag and drop re the text within java, but how do i go about dragging an external icon over a java app and having that pass me the file location (which is actually all i need...)
thanks in advance!

i understand the use of the drag and drop re the text
within java, Are you sure?
Read this:
http://java.sun.com/docs/books/tutorial/uiswing/misc/dnd.html

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Drag and drop icons from onside of the split pane to the other side.

Hello All,
I am tring to write a program where i can drag and drop icons from the left side of the split pane to the right side. I have to draw a network on the right side of the split pane from the icons provided on the left side. Putting the icons on the labels donot work as i would like to drag multiple icons from the left side and drop them on the right side. CAn anyone please help me with this.
Thanks in advance
smitha

The other option besides the drag_n_drop support
http://java.sun.com/docs/books/tutorial/uiswing/dnd/intro.htmlis to make up something on your own. You could use a glasspane (see JRootPane api for overview) as mentioned in the tutorial.
Here's another variation using an OverlayLayout. One advantage of this approach is that you can localize the overlay component and avoid some work.
import java.awt.*;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import java.io.*;
import javax.imageio.ImageIO;
import javax.swing.*;
import javax.swing.event.MouseInputAdapter;
public class DragRx extends JComponent {
    JPanel rightComponent;
    BufferedImage image;
    Point loc = new Point();
    protected void paintComponent(Graphics g) {
        Graphics2D g2 = (Graphics2D)g;
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                            RenderingHints.VALUE_ANTIALIAS_ON);
        if(image != null)
            g2.drawImage(image, loc.x, loc.y, this);
    public void setImage(BufferedImage image) {
        this.image = image;
        repaint();
    public void moveImage(int x, int y) {
        loc.setLocation(x, y);
        repaint();
    public void dropImage(Point p) {
        int w = image.getWidth();
        int h = image.getHeight();
        p = SwingUtilities.convertPoint(this, p, rightComponent);
        JLabel label = new JLabel(new ImageIcon(image));
        rightComponent.add(label);
        label.setBounds(p.x, p.y, w, h);
        setImage(null);
    private JPanel getContent(BufferedImage[] images) {
        JSplitPane splitPane = new JSplitPane();
        splitPane.setLeftComponent(getLeftComponent(images));
        splitPane.setRightComponent(getRightComponent());
        splitPane.setResizeWeight(0.5);
        splitPane.setDividerLocation(225);
        JPanel panel = new JPanel();
        OverlayLayout overlay = new OverlayLayout(panel);
        panel.setLayout(overlay);
        panel.add(this);
        panel.add(splitPane);
        return panel;
    private JPanel getLeftComponent(BufferedImage[] images) {
        JPanel panel = new JPanel(new GridBagLayout());
        GridBagConstraints gbc = new GridBagConstraints();
        gbc.weightx = 1.0;
        gbc.weighty = 1.0;
        for(int j = 0; j < images.length; j++) {
            gbc.gridwidth = (j%2 == 0) ? GridBagConstraints.RELATIVE
                                       : GridBagConstraints.REMAINDER;
            panel.add(new JLabel(new ImageIcon(images[j])), gbc);
        CopyDragHandler handler = new CopyDragHandler(panel, this);
        panel.addMouseListener(handler);
        panel.addMouseMotionListener(handler);
        return panel;
    private JPanel getRightComponent() {
        rightComponent = new JPanel(null);
        MouseInputAdapter mia = new MouseInputAdapter() {
            Component selectedComponent;
            Point offset = new Point();
            boolean dragging = false;
            public void mousePressed(MouseEvent e) {
                Point p = e.getPoint();
                for(Component c : rightComponent.getComponents()) {
                    Rectangle r = c.getBounds();
                    if(r.contains(p)) {
                        selectedComponent = c;
                        offset.x = p.x - r.x;
                        offset.y = p.y - r.y;
                        dragging = true;
                        break;
            public void mouseReleased(MouseEvent e) {
                dragging = false;
            public void mouseDragged(MouseEvent e) {
                if(dragging) {
                    int x = e.getX() - offset.x;
                    int y = e.getY() - offset.y;
                    selectedComponent.setLocation(x,y);
        rightComponent.addMouseListener(mia);
        rightComponent.addMouseMotionListener(mia);
        return rightComponent;
    public static void main(String[] args) throws IOException {
        String[] ids = { "-c---", "--g--", "---h-", "----t" };
        BufferedImage[] images = new BufferedImage[ids.length];
        for(int j = 0; j < images.length; j++) {
            String path = "images/geek/geek" + ids[j] + ".gif";
            images[j] = ImageIO.read(new File(path));
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.add(new DragRx().getContent(images));
        f.setSize(500,400);
        f.setLocation(200,200);
        f.setVisible(true);
class CopyDragHandler extends MouseInputAdapter {
    JComponent source;
    DragRx target;
    JLabel selectedLabel;
    Point start;
    Point offset = new Point();
    boolean dragging = false;
    final int MIN_DIST = 5;
    public CopyDragHandler(JComponent c, DragRx dr) {
        source = c;
        target = dr;
    public void mousePressed(MouseEvent e) {
        Point p = e.getPoint();
        Component[] c = source.getComponents();
        for(int j = 0; j < c.length; j++) {
            Rectangle r = c[j].getBounds();
            if(r.contains(p) && c[j] instanceof JLabel) {
                offset.x = p.x - r.x;
                offset.y = p.y - r.y;
                start = p;
                selectedLabel = (JLabel)c[j];
                break;
    public void mouseReleased(MouseEvent e) {
        if(dragging && selectedLabel != null) {
            int x = e.getX() - offset.x;
            int y = e.getY() - offset.y;
            target.dropImage(new Point(x,y));
        selectedLabel = null;
        dragging = false;
    public void mouseDragged(MouseEvent e) {
        Point p = e.getPoint();
        if(!dragging && selectedLabel != null
                     && p.distance(start) > MIN_DIST) {
            dragging = true;
            copyAndSend();
        if(dragging) {
            int x = p.x - offset.x;
            int y = p.y - offset.y;
            target.moveImage(x, y);
    private void copyAndSend() {
        ImageIcon icon = (ImageIcon)selectedLabel.getIcon();
        BufferedImage image = copy((BufferedImage)icon.getImage());
        target.setImage(image);
    private BufferedImage copy(BufferedImage src) {
        int w = src.getWidth();
        int h = src.getHeight();
        BufferedImage dst =
            source.getGraphicsConfiguration().createCompatibleImage(w,h);
        Graphics2D g2 = dst.createGraphics();
        g2.drawImage(src,0,0,source);
        g2.dispose();
        return dst;
}geek images from
http://java.sun.com/docs/books/tutorial/uiswing/examples/components/index.html

Desktop drag and drop icon for my "other" computer

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if as3, create a sprite or movieclip and use:
image1.addEventListener(MouseEvent.MOUSE_DOWN,downF);
image1.addEventListener(MouseEvent.MOUSE_UP,upF);
function downF(e:MouseEvent):void{
Sprite(e.currentTarget).startDrag();
function upF(e:MouseEvent):void{
Sprite(e.currentTarget).stopDrag();

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Yes it is possible, but not so easy. If you'll be at OOW this year, you can come to my session (S301752, Monday 13:00-14:00) - I will show something similar there. If you're not so lucky, you can read the excellent blogpost of my colleague at [http://rutgerderuiter.blogspot.com/2008/07/drag-planboard.html]
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See:
* http://kb.mozillazine.org/Corrupt_localstore.rdf
Start Firefox in [[Safe Mode]] to check if one of the add-ons is causing the problem (switch to the DEFAULT theme: Tools > Add-ons > Appearance/Themes).
* Don't make any changes on the Safe mode start window.
See:
* [[Troubleshooting extensions and themes]]

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It is possible to try to long tap then try to drag it, but if the website does not have it programmed, it may not work. There is Javascript UI touch punch that you can check out to develop this capability, but that would be a question for stackoverflow.com.
I am sorry I could not be more helpful.

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Restart and see if that solves your issue.

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So Copy/Paste, etc. isn't working in say Text Edit?
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From:
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Hi,
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It fails sometimes with 3 photos, sometimes with 30.
What's more puzzling is that it sometimes works: if I drag and drop of a single photo it always works. And I'm sometimes able to drop 10 or more photos.
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So, your photo has the correct date, and so does the file, but they are different things. To sort on the Photo date you'll need to use a photo app.

Drag and drop icons

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