Drag and drop to apply color to art.
Hi All,
I am designing a panel for Illustrator CS6 that displays colors in a datagrid as follows,
[Color] [Color_Name]
I want to be able to apply color to any art by using the drag-n-drop from the panel to the document. Is it possible that I am able to detect the art on which the color was dropped so that I can apply the color?
Thanks!
I came upon the NativeDragManager class of the CS Extension. We can use it to drag and drop objects from the panel to the application document. For this we use the ClipBoard and specify the format of the clipboard data. There are quite a few formats, namely, bitmap, text, url, file, etc. However, I couldn't use any of these so that I might drag a color from my panel to the document.
Here is a code to drag and drop a text from panel to document,
var clip:Clipboard = new Clipboard();
clip.setData(ClipboardFormats.TEXT_FORMAT, designsDG.selectedItem.Colors);
var allowedActions:NativeDragOptions = new NativeDragOptions();
NativeDragManager.doDrag(designsDG.selectedItem as InteractiveObject, clip);
Here designsDG is the datagrid containing the text.
How can I do something similar for a color object?
Any inputs?
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Using JDev 11.1.2.1.0.
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I'll be back with pictures after the break.
WillI've rolled this into a bug post as seen here: BUG: NamedViewCriteria drag and drop as table SNAFU
Pictures:
Here is the NVC query
http://www.williverstravels.com/JDev/Forums/Threads/2381120/Nvc1.jpg
Here's that dang extra bind variable!
http://www.williverstravels.com/JDev/Forums/Threads/2381120/Nvc3.jpg
And just because I like awesome Paint.Net art.
http://www.williverstravels.com/JDev/Forums/Threads/2381120/Nvc2.jpg
Hope this helps someone down the road.
Edited by: LovettWB on Apr 26, 2012 1:59 PM -
Can anyone recommend me a good tutorial on how to drag and drop or even resize an image in a panel ?
I'm back.
I wrote a 2 classes appli that allow to move and resize images displayed in a panel.
The first class is the most interesting one. It describes an object which extends Rectangle and manage an Image. This class names TransformableImage extends Rectangle because we need to know the bounds of the rectangle, where the image is contained in, to allow mouse interactions through the panel.
The behavior we want is to change the kind of cursors according to the position of the mouse on the panel :
if the mouse is out of any images the cursor is the default one. If the cursor is on an image, it can be a move cursor in the center of the image or one of the resize cursors if the mouse is on the border of the image.
Here is the class :
import java.awt.*;
import javax.swing.*;
import java.awt.image.*;
public final class TransformableImage extends Rectangle {
public static final int MOVE = 0;
public static final int RESIZE_TOP = 10;
public static final int RESIZE_BOTTOM = 20;
public static final int RESIZE_RIGHT = 1;
public static final int RESIZE_LEFT = 2;
public static final int RESIZE_TOP_RIGHT_CORNER = 11;
public static final int RESIZE_TOP_LEFT_CORNER = 12;
public static final int RESIZE_BOTTOM_RIGHT_CORNER = 21;
public static final int RESIZE_BOTTOM_LEFT_CORNER = 22;
public static final int BORDER_THICKNESS = 5;
public static final int MIN_THICKNESS = BORDER_THICKNESS*2;
private static final Color borderColor = Color.black;
private Image image;
* Create an TransformableImage from the image file filename.
* The TransformableImage bounds (inherited from the class Rectangle) are setted to the corresponding values.
public TransformableImage(String filename) {
ImageIcon ic = new ImageIcon(filename);
image = ic.getImage();
setBounds(0,0,ic.getIconWidth(), ic.getIconHeight());
* Draw the image rescaled to fit the bounds.
* A black rectangle is drawn around the image.
public final void draw(Graphics2D g, ImageObserver observer) {
Color oldColor = g.getColor();
g.setColor(borderColor);
g.drawImage(image, x, y, width, height, observer);
g.draw(this);
g.setColor(oldColor);
* Return an int corresponding to the transformation available according to the mouse location on the image.
* If the point p is in the border, with a thickness of BORDER_THICKNESS, around the image, the corresponding
* transformation is returned (RESIZE_TOP, ..., RESIZE_BOTTOM_LEFT_CORNER).
* If the point p is located in the center of the image (i.e. out of the border), the MOVE transformation is returned.
* We allways suppose that p is contained in the image bounds.
public final int getTransformation(Point p) {
int px = p.x;
int py = p.y;
int transformation = 0;
if (py<(y+BORDER_THICKNESS)) {
transformation += RESIZE_TOP;
else
if (py>(y+height-BORDER_THICKNESS-1)) {
transformation += RESIZE_BOTTOM;
if (px<(x+BORDER_THICKNESS)) {
transformation += RESIZE_LEFT;
else
if (px>(x+width-BORDER_THICKNESS-1)) {
transformation += RESIZE_RIGHT;
return(transformation);
* Move the left side of the image, verifying that the width is > to the MIN_THICKNESS.
public final void moveX1(int px) {
int x1 = x+width;
if (px>x1-MIN_THICKNESS) {
x = x1-MIN_THICKNESS;
width = MIN_THICKNESS;
else {
width += (x-px);
x = px;
* Move the right side of the image, verifying that the width is > to the MIN_THICKNESS.
public final void moveX2(int px) {
width = px-x;
if (width<MIN_THICKNESS) {
width = MIN_THICKNESS;
* Move the top side of the image, verifying that the height is > to the MIN_THICKNESS.
public final void moveY1(int py) {
int y1 = y+height;
if (py>y1-MIN_THICKNESS) {
y = y1-MIN_THICKNESS;
height = MIN_THICKNESS;
else {
height += (y-py);
y = py;
* Move the bottom side of the image, verifying that the height is > to the MIN_THICKNESS.
public final void moveY2(int py) {
height = py-y;
if (height<MIN_THICKNESS) {
height = MIN_THICKNESS;
* Apply a given transformation with the given Point to the image.
* The shift values dx and dy are needed for move tho locate the image at the same relative position from the cursor (p).
public final void transform(Point p, int transformationType, int dx, int dy) {
int px = p.x;
int py = p.y;
switch (transformationType) {
case MOVE : x = px-dx; y = py-dy;
break;
case RESIZE_TOP : moveY1(py);
break;
case RESIZE_BOTTOM : moveY2(py);
break;
case RESIZE_LEFT : moveX1(px);
break;
case RESIZE_RIGHT : moveX2(px);
break;
case RESIZE_TOP_LEFT_CORNER : moveX1(px);moveY1(py);
break;
case RESIZE_TOP_RIGHT_CORNER : moveX2(px);moveY1(py);
break;
case RESIZE_BOTTOM_LEFT_CORNER : moveX1(px);moveY2(py);
break;
case RESIZE_BOTTOM_RIGHT_CORNER : moveX2(px);moveY2(py);
break;
default :
}And now, we need to create the panel where we are going to draw the images and interact with them with the mouse. In fact we need a paintComponent method used to draw the images and a Mouse(Motion)Listener to manage the required mouse events.
We also have to create a method to set the convenient cursor according to tha position of the mouse over the images.
Here is the class :
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
public class ImagePanel extends JComponent {
private static final Cursor DEFAULT_CURSOR = new Cursor(Cursor.DEFAULT_CURSOR);
private static final Cursor MOVE_CURSOR = new Cursor(Cursor.MOVE_CURSOR);
private static final Cursor VERTICAL_RESIZE_CURSOR = new Cursor(Cursor.N_RESIZE_CURSOR);
private static final Cursor HORIZONTAL_RESIZE_CURSOR = new Cursor(Cursor.W_RESIZE_CURSOR);
private static final Cursor NW_SE_RESIZE_CURSOR = new Cursor(Cursor.NW_RESIZE_CURSOR);
private static final Cursor NE_SW_RESIZE_CURSOR = new Cursor(Cursor.NE_RESIZE_CURSOR);
public Vector images;
* Create an ImagePanel with two images in.
* A MouseHandler instance is added as mouse listener and mouse motion listener.
public ImagePanel() {
images = new Vector();
images.add(new TransformableImage("image1.gif"));
images.add(new TransformableImage("image2.gif"));
setPreferredSize(new Dimension(600,600));
MouseHandler mh = new MouseHandler();
addMouseListener(mh);
addMouseMotionListener(mh);
* Simply paint all the images contained in the Vector images, calling their method draw(Graphics2D, ImageObserver).
public void paintComponent(Graphics g) {
Graphics2D g2D = (Graphics2D)g;
for (int i = images.size()-1; i>=0; i--) {
((TransformableImage)images.get(i)).draw(g2D, this);
* Inner class defining the behavior of the mouse.
final class MouseHandler extends MouseInputAdapter {
private TransformableImage draggedImage;
private int transformation;
private int dx, dy;
public void mouseMoved(MouseEvent e) {
Point p = e.getPoint();
TransformableImage image = getImageAt(p);
if (image != null) {
transformation = image.getTransformation(p);
setConvenientCursor(transformation);
else {
setConvenientCursor(-1);
public void mousePressed(MouseEvent e) {
Point p = e.getPoint();
draggedImage = getImageAt(p);
if (draggedImage!=null) {
dx = p.x-draggedImage.x;
dy = p.y-draggedImage.y;
public void mouseDragged(MouseEvent e) {
if (draggedImage==null) {
return;
Point p = e.getPoint();
repaint(draggedImage.x,draggedImage.y,draggedImage.width+1,draggedImage.height+1);
draggedImage.transform(p, transformation,dx,dy);
repaint(draggedImage.x,draggedImage.y,draggedImage.width+1,draggedImage.height+1);
public void mouseReleased(MouseEvent e) {
Point p = e.getPoint();
draggedImage = null;
* Utility method used to get the image located at a Point p.
* Returns null if there is no image at this point.
private final TransformableImage getImageAt(Point p) {
TransformableImage image = null;
for (int i = 0, n = images.size(); i<n; i++) {
image = (TransformableImage)images.get(i);
if (image.contains(p)) {
return(image);
return(null);
* Sets the convenient cursor according the the transformation (i.e. the position of the mouse over the image).
private final void setConvenientCursor(int transfo) {
Cursor currentCursor = getCursor();
Cursor newCursor = null;
switch (transfo) {
case TransformableImage.MOVE : newCursor = MOVE_CURSOR;
break;
case TransformableImage.RESIZE_TOP : newCursor = VERTICAL_RESIZE_CURSOR;
break;
case TransformableImage.RESIZE_BOTTOM : newCursor = VERTICAL_RESIZE_CURSOR;
break;
case TransformableImage.RESIZE_LEFT : newCursor = HORIZONTAL_RESIZE_CURSOR;
break;
case TransformableImage.RESIZE_RIGHT : newCursor = HORIZONTAL_RESIZE_CURSOR;
break;
case TransformableImage.RESIZE_TOP_LEFT_CORNER : newCursor = NW_SE_RESIZE_CURSOR;
break;
case TransformableImage.RESIZE_TOP_RIGHT_CORNER : newCursor = NE_SW_RESIZE_CURSOR;
break;
case TransformableImage.RESIZE_BOTTOM_LEFT_CORNER : newCursor = NE_SW_RESIZE_CURSOR;
break;
case TransformableImage.RESIZE_BOTTOM_RIGHT_CORNER : newCursor = NW_SE_RESIZE_CURSOR;
break;
default : newCursor = DEFAULT_CURSOR;
if (newCursor != null && currentCursor != newCursor) {
setCursor(newCursor);
public static void main(String[] args) {
JFrame frame = new JFrame("Test transformable images");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(new ImagePanel(), BorderLayout.CENTER);
frame.pack();
frame.setVisible(true);
}If you want more information tell me.
------- Here is the unformatted version -----
import java.awt.*;
import javax.swing.*;
import java.awt.image.*;
public final class TransformableImage extends Rectangle {
public static final int MOVE = 0;
public static final int RESIZE_TOP = 10;
public static final int RESIZE_BOTTOM = 20;
public static final int RESIZE_RIGHT = 1;
public static final int RESIZE_LEFT = 2;
public static final int RESIZE_TOP_RIGHT_CORNER = 11;
public static final int RESIZE_TOP_LEFT_CORNER = 12;
public static final int RESIZE_BOTTOM_RIGHT_CORNER = 21;
public static final int RESIZE_BOTTOM_LEFT_CORNER = 22;
public static final int BORDER_THICKNESS = 5;
public static final int MIN_THICKNESS = BORDER_THICKNESS*2;
private static final Color borderColor = Color.black;
private Image image;
* Create an TransformableImage from the image file filename.
* The TransformableImage bounds (inherited from the class Rectangle) are setted to the corresponding values.
public TransformableImage(String filename) {
ImageIcon ic = new ImageIcon(filename);
image = ic.getImage();
setBounds(0,0,ic.getIconWidth(), ic.getIconHeight());
* Draw the image rescaled to fit the bounds.
* A black rectangle is drawn around the image.
public final void draw(Graphics2D g, ImageObserver observer) {
Color oldColor = g.getColor();
g.setColor(borderColor);
g.drawImage(image, x, y, width, height, observer);
g.draw(this);
g.setColor(oldColor);
* Return an int corresponding to the transformation available according to the mouse location on the image.
* If the point p is in the border, with a thickness of BORDER_THICKNESS, around the image, the corresponding
* transformation is returned (RESIZE_TOP, ..., RESIZE_BOTTOM_LEFT_CORNER).
* If the point p is located in the center of the image (i.e. out of the border), the MOVE transformation is returned.
* We allways suppose that p is contained in the image bounds.
public final int getTransformation(Point p) {
int px = p.x;
int py = p.y;
int transformation = 0;
if (py<(y+BORDER_THICKNESS)) {
transformation += RESIZE_TOP;
else
if (py>(y+height-BORDER_THICKNESS-1)) {
transformation += RESIZE_BOTTOM;
if (px<(x+BORDER_THICKNESS)) {
transformation += RESIZE_LEFT;
else
if (px>(x+width-BORDER_THICKNESS-1)) {
transformation += RESIZE_RIGHT;
return(transformation);
* Move the left side of the image, verifying that the width is > to the MIN_THICKNESS.
public final void moveX1(int px) {
int x1 = x+width;
if (px>x1-MIN_THICKNESS) {
x = x1-MIN_THICKNESS;
width = MIN_THICKNESS;
else {
width += (x-px);
x = px;
* Move the right side of the image, verifying that the width is > to the MIN_THICKNESS.
public final void moveX2(int px) {
width = px-x;
if (width<MIN_THICKNESS) {
width = MIN_THICKNESS;
* Move the top side of the image, verifying that the height is > to the MIN_THICKNESS.
public final void moveY1(int py) {
int y1 = y+height;
if (py>y1-MIN_THICKNESS) {
y = y1-MIN_THICKNESS;
height = MIN_THICKNESS;
else {
height += (y-py);
y = py;
* Move the bottom side of the image, verifying that the height is > to the MIN_THICKNESS.
public final void moveY2(int py) {
height = py-y;
if (height<MIN_THICKNESS) {
height = MIN_THICKNESS;
* Apply a given transformation with the given Point to the image.
* The shift values dx and dy are needed for move tho locate the image at the same relative position from the cursor (p).
public final void transform(Point p, int transformationType, int dx, int dy) {
int px = p.x;
int py = p.y;
switch (transformationType) {
case MOVE : x = px-dx; y = py-dy;
break;
case RESIZE_TOP : moveY1(py);
break;
case RESIZE_BOTTOM : moveY2(py);
break;
case RESIZE_LEFT : moveX1(px);
break;
case RESIZE_RIGHT : moveX2(px);
break;
case RESIZE_TOP_LEFT_CORNER : moveX1(px);moveY1(py);
break;
case RESIZE_TOP_RIGHT_CORNER : moveX2(px);moveY1(py);
break;
case RESIZE_BOTTOM_LEFT_CORNER : moveX1(px);moveY2(py);
break;
case RESIZE_BOTTOM_RIGHT_CORNER : moveX2(px);moveY2(py);
break;
default :
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
public class ImagePanel extends JComponent {
private static final Cursor DEFAULT_CURSOR = new Cursor(Cursor.DEFAULT_CURSOR);
private static final Cursor MOVE_CURSOR = new Cursor(Cursor.MOVE_CURSOR);
private static final Cursor VERTICAL_RESIZE_CURSOR = new Cursor(Cursor.N_RESIZE_CURSOR);
private static final Cursor HORIZONTAL_RESIZE_CURSOR = new Cursor(Cursor.W_RESIZE_CURSOR);
private static final Cursor NW_SE_RESIZE_CURSOR = new Cursor(Cursor.NW_RESIZE_CURSOR);
private static final Cursor NE_SW_RESIZE_CURSOR = new Cursor(Cursor.NE_RESIZE_CURSOR);
public Vector images;
* Create an ImagePanel with two images in.
* A MouseHandler instance is added as mouse listener and mouse motion listener.
public ImagePanel() {
images = new Vector();
images.add(new TransformableImage("image1.gif"));
images.add(new TransformableImage("image2.gif"));
setPreferredSize(new Dimension(600,600));
MouseHandler mh = new MouseHandler();
addMouseListener(mh);
addMouseMotionListener(mh);
* Simply paint all the images contained in the Vector images, calling their method draw(Graphics2D, ImageObserver).
public void paintComponent(Graphics g) {
Graphics2D g2D = (Graphics2D)g;
for (int i = images.size()-1; i>=0; i--) {
((TransformableImage)images.get(i)).draw(g2D, this);
* Inner class defining the behavior of the mouse.
final class MouseHandler extends MouseInputAdapter {
private TransformableImage draggedImage;
private int transformation;
private int dx, dy;
public void mouseMoved(MouseEvent e) {
Point p = e.getPoint();
TransformableImage image = getImageAt(p);
if (image != null) {
transformation = image.getTransformation(p);
setConvenientCursor(transformation);
else {
setConvenientCursor(-1);
public void mousePressed(MouseEvent e) {
Point p = e.getPoint();
draggedImage = getImageAt(p);
if (draggedImage!=null) {
dx = p.x-draggedImage.x;
dy = p.y-draggedImage.y;
public void mouseDragged(MouseEvent e) {
if (draggedImage==null) {
return;
Point p = e.getPoint();
repaint(draggedImage.x,draggedImage.y,draggedImage.width+1,draggedImage.height+1);
draggedImage.transform(p, transformation,dx,dy);
repaint(draggedImage.x,draggedImage.y,draggedImage.width+1,draggedImage.height+1);
public void mouseReleased(MouseEvent e) {
Point p = e.getPoint();
draggedImage = null;
* Utility method used to get the image located at a Point p.
* Returns null if there is no image at this point.
private final TransformableImage getImageAt(Point p) {
TransformableImage image = null;
for (int i = 0, n = images.size(); i<n; i++) {
image = (TransformableImage)images.get(i);
if (image.contains(p)) {
return(image);
return(null);
* Sets the convenient cursor according the the transformation (i.e. the position of the mouse over the image).
private final void setConvenientCursor(int transfo) {
Cursor currentCursor = getCursor();
Cursor newCursor = null;
switch (transfo) {
case TransformableImage.MOVE : newCursor = MOVE_CURSOR;
break;
case TransformableImage.RESIZE_TOP : newCursor = VERTICAL_RESIZE_CURSOR;
break;
case TransformableImage.RESIZE_BOTTOM : newCursor = VERTICAL_RESIZE_CURSOR;
break;
case TransformableImage.RESIZE_LEFT : newCursor = HORIZONTAL_RESIZE_CURSOR;
break;
case TransformableImage.RESIZE_RIGHT : newCursor = HORIZONTAL_RESIZE_CURSOR;
break;
case TransformableImage.RESIZE_TOP_LEFT_CORNER : newCursor = NW_SE_RESIZE_CURSOR;
break;
case TransformableImage.RESIZE_TOP_RIGHT_CORNER : newCursor = NE_SW_RESIZE_CURSOR;
break;
case TransformableImage.RESIZE_BOTTOM_LEFT_CORNER : newCursor = NE_SW_RESIZE_CURSOR;
break;
case TransformableImage.RESIZE_BOTTOM_RIGHT_CORNER : newCursor = NW_SE_RESIZE_CURSOR;
break;
default : newCursor = DEFAULT_CURSOR;
if (newCursor != null && currentCursor != newCursor) {
setCursor(newCursor);
public static void main(String[] args) {
JFrame frame = new JFrame("Test transformable images");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(new ImagePanel(), BorderLayout.CENTER);
frame.pack();
frame.setVisible(true);
Denis -
Text Wont Show And I cant drag and drop
ok well when I insert text it doesnt show but It shows what i written on the side. I have contact support their answer was they can't help me because I am trial verison. I am simply not going to buy a program if the trial verison is not working its that simple. Also When I try to drag and drop a picture a little circle apears with the line through it. I do have admin rights.
Usually when you can not see text is is one of the following.
1)Color of the text is the same color as the background
2)there is a layer over top of the text blocking the text
3)The opacity of the text layer is almost transparent (the opacity is less than 100%)
4)A blend mode is applied to the text layer
5)A layer style is applied to the text layer that either does 1, 2, or 4
As far as draging and dropping, just drag the file from your respective file viewer and drop it on the background of photoshop (it will open the file assuming it is a file that photoshop can read)
So verify that the file can be viewed in another app to make sure the file is not corrupt
Make sure the file extention is one that photoshop supports. (in photoshop go to the menu and select File>Open, then find the text that says file type and click on the box next to it. That will drop down a list of supported file types. If it is not listed, it will not open)
That being said there are time when it should work and don't, so if anything here does not work, post back and someone can help.
By the way, it best to post what version of photoshop you have, what operating system you have and a screen grab of photoshop so we can see what you see. For future reference... -
Problem with drag and drop on Mac
Hi, when I run my AIR application on Windows, I'm able to do
the drag and drop.
But when I run the application on Mac, it gave me an
allocation error: unable to allocate region of size <random
number> after I drag and drop thrice.
Anybody knows what's the reason?Pages does not support the Apple font used for color emoji, so that behavior is normal.
With what app are you reading the yahoo mail? There is really no guarantee than any other email service will show the special Apple font involved.
You should have no problem putting emoji directly into Mail or Text edit via drag drop from the Character Viewer as shown below.
You should also be able to upload graphics here easily by clicking on the camera icon. My email is tom at bluesky dot org. -
I can't drag and drop songs onto my iPod from iTunes. (Manual transfer is not working.) Please help!
Normally, I just select songs and I'm able to drag and drop them from my library onto my device. I have an iPod Touch and an iPhone 4. I want to drag and drop my songs from the library onto my iPod Touch. I have already selected manual upload instead of automatic sync. I tried suggestions from the Mac message board (since other people seem to have had a similar issue), and their solutions didn't work for me. I have restarted both iTunes, my computer, and reconnected my iPod multiple times. I don't know what's going on, and I can't find a fix anywhere in iTunes help. If anyone knows what to do, or has any suggestions, please let me know! Thanks.
Update: I seem to have fixed the problem! I went to the "summary" section of my iPod after clicking on the device on the left side of iTunes. I checked the box that allowed me to "manually manage music and videos" and applied this option. The songs are syncing! And, yay, they're playing on my iPod now! Hopefully, this helps anyone else who might have this problem. There might be other issues, but this is working for now.
-
How to drag and drop a file with its Systemfile icon to a Jtext area
I want to drag and drop a file to a JText area with its system file icon , but the problem is I cant show the file icon.
Anyone knows this.
this is my code.
import java.awt.*;
import java.awt.image.BufferedImage;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.dnd.DnDConstants;
import java.awt.dnd.DropTarget;
import java.awt.dnd.DropTargetDragEvent;
import java.awt.dnd.DropTargetDropEvent;
import java.awt.dnd.DropTargetEvent;
import java.awt.dnd.DropTargetListener;
import java.io.File;
import javax.swing.*;
import javax.swing.filechooser.FileSystemView;
public class FileDrag extends JFrame implements DropTargetListener {
DropTarget dt;
File file;
JTextArea ta;
JLabel lbl;
Graphics g;
ImageIcon tmpIcon;
public FileDrag() {
super("Drop Test");
setSize(300, 300);
getContentPane().add(
new JLabel("Drop a list from your file chooser here:"),
BorderLayout.NORTH);
ta = new JTextArea();
ta.setBackground(Color.white);
getContentPane().add(ta);
dt = new DropTarget(ta, this);
setVisible(true);
public void dragEnter(DropTargetDragEvent dtde) {
System.out.println("Drag Enter");
public void dragExit(DropTargetEvent dte) {
System.out.println("Source: " + dte.getSource());
System.out.println("Drag Exit");
public void dragOver(DropTargetDragEvent dtde) {
System.out.println("Drag Over");
public void dropActionChanged(DropTargetDragEvent dtde) {
System.out.println("Drop Action Changed");
public void drop(DropTargetDropEvent dtde) {
FileSystemView view = FileSystemView.getFileSystemView();
JLabel testb;
Icon icon = null;
Toolkit tk;
Dimension dim;
BufferedImage buff = null;
try {
Transferable tr = dtde.getTransferable();
DataFlavor[] flavors = tr.getTransferDataFlavors();
for (int i = 0; i < flavors.length; i++) {
System.out.println("Possible flavor: " + flavors.getMimeType());
if (flavors[i].isFlavorJavaFileListType()) {
dtde.acceptDrop(DnDConstants.ACTION_COPY);
ta.setText("Successful file list drop.\n\n");
java.util.List list = (java.util.List) tr.getTransferData(flavors[i]);
for (int j = 0; j < list.size(); j++) {
System.out.println(list.get(j));
file = (File) list.get(j);
icon = view.getSystemIcon(file);
ta.append(list.get(j) + "\n");
ta.append("\n");
tk = Toolkit.getDefaultToolkit();
dim = tk.getBestCursorSize(icon.getIconWidth(), icon.getIconHeight());
buff = new BufferedImage(dim.width, dim.height, BufferedImage.TYPE_INT_ARGB);
icon.paintIcon(ta, buff.getGraphics(), 10, 10);
repaint();
dtde.dropComplete(true);
return;
System.out.println("Drop failed: " + dtde);
dtde.rejectDrop();
} catch (Exception e) {
e.printStackTrace();
dtde.rejectDrop();
public static void main(String args[]) {
new FileDrag();I want to drag and drop a file to a JText area with its system file icon , but the problem is I cant show the file icon.
Anyone knows this.
this is my code.
import java.awt.*;
import java.awt.image.BufferedImage;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.dnd.DnDConstants;
import java.awt.dnd.DropTarget;
import java.awt.dnd.DropTargetDragEvent;
import java.awt.dnd.DropTargetDropEvent;
import java.awt.dnd.DropTargetEvent;
import java.awt.dnd.DropTargetListener;
import java.io.File;
import javax.swing.*;
import javax.swing.filechooser.FileSystemView;
public class FileDrag extends JFrame implements DropTargetListener {
DropTarget dt;
File file;
JTextArea ta;
JLabel lbl;
Graphics g;
ImageIcon tmpIcon;
public FileDrag() {
super("Drop Test");
setSize(300, 300);
getContentPane().add(
new JLabel("Drop a list from your file chooser here:"),
BorderLayout.NORTH);
ta = new JTextArea();
ta.setBackground(Color.white);
getContentPane().add(ta);
dt = new DropTarget(ta, this);
setVisible(true);
public void dragEnter(DropTargetDragEvent dtde) {
System.out.println("Drag Enter");
public void dragExit(DropTargetEvent dte) {
System.out.println("Source: " + dte.getSource());
System.out.println("Drag Exit");
public void dragOver(DropTargetDragEvent dtde) {
System.out.println("Drag Over");
public void dropActionChanged(DropTargetDragEvent dtde) {
System.out.println("Drop Action Changed");
public void drop(DropTargetDropEvent dtde) {
FileSystemView view = FileSystemView.getFileSystemView();
JLabel testb;
Icon icon = null;
Toolkit tk;
Dimension dim;
BufferedImage buff = null;
try {
Transferable tr = dtde.getTransferable();
DataFlavor[] flavors = tr.getTransferDataFlavors();
for (int i = 0; i < flavors.length; i++) {
System.out.println("Possible flavor: " + flavors.getMimeType());
if (flavors[i].isFlavorJavaFileListType()) {
dtde.acceptDrop(DnDConstants.ACTION_COPY);
ta.setText("Successful file list drop.\n\n");
java.util.List list = (java.util.List) tr.getTransferData(flavors[i]);
for (int j = 0; j < list.size(); j++) {
System.out.println(list.get(j));
file = (File) list.get(j);
icon = view.getSystemIcon(file);
ta.append(list.get(j) + "\n");
ta.append("\n");
tk = Toolkit.getDefaultToolkit();
dim = tk.getBestCursorSize(icon.getIconWidth(), icon.getIconHeight());
buff = new BufferedImage(dim.width, dim.height, BufferedImage.TYPE_INT_ARGB);
icon.paintIcon(ta, buff.getGraphics(), 10, 10);
repaint();
dtde.dropComplete(true);
return;
System.out.println("Drop failed: " + dtde);
dtde.rejectDrop();
} catch (Exception e) {
e.printStackTrace();
dtde.rejectDrop();
public static void main(String args[]) {
new FileDrag();
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