Drag and Drop problem...

Here is my code:

AbstractDropManager.java

Code:

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import java.awt.Point;
import java.awt.Rectangle;

import javax.swing.JComponent;
import javax.swing.SwingUtilities;

public abstract class AbstractDropManager implements DropListener {
        protected JComponent component;

        public AbstractDropManager() {
                this(null);
        }
       
        public AbstractDropManager(JComponent component) {
                this.component = component;
        }

        protected Point getTranslatedPoint(Point point) {
        Point p = (Point) point.clone();
        SwingUtilities.convertPointFromScreen(p, component);
                return p;
        }

        protected boolean isInTarget(Point point) {
                Rectangle bounds = component.getBounds();
                return bounds.contains(point);
        }

        public void Dropped(DropEvent e) {
        }
}


[U]ComponentAdapter.java[/U]
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Point;
import java.awt.event.MouseEvent;
import java.awt.image.BufferedImage;

import javax.swing.SwingUtilities;

public class ComponentAdapter extends DropAdapter
{
    public ComponentAdapter(GlassPane glassPane, String action) {
        super(glassPane, action);
    }

    public void mousePressed(MouseEvent e)
    {
        Component c = e.getComponent();

        BufferedImage image = new BufferedImage(c.getWidth(), c.getHeight(), BufferedImage.TYPE_INT_ARGB);
        Graphics g = image.getGraphics();
        c.paint(g);

        glassPane.setVisible(true);

        Point p = (Point) e.getPoint().clone();
        SwingUtilities.convertPointToScreen(p, c);
        SwingUtilities.convertPointFromScreen(p, glassPane);

        glassPane.setPoint(p);
        glassPane.setImage(image);
        glassPane.repaint();
    }

    public void mouseReleased(MouseEvent e)
    {
        Component c = e.getComponent();

        Point p = (Point) e.getPoint().clone();
        SwingUtilities.convertPointToScreen(p, c);

        Point eventPoint = (Point) p.clone();
        SwingUtilities.convertPointFromScreen(p, glassPane);

        glassPane.setPoint(p);
        glassPane.setVisible(false);
        glassPane.setImage(null);

        fireDropEvent(new DropEvent(action, eventPoint));
    }
}



[U]DragnDemo.java[/U]
import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.table.*;

public class DragnDemo extends JFrame{
    private GlassPane glassPane;

    public DragnDemo ()
    {
        super ("Welcome");
        setDefaultCloseOperation (EXIT_ON_CLOSE);

        glassPane = new GlassPane ();
        setGlassPane (glassPane);
        //JPanel c=new JPanel(new BorderLayout());

        JTextField txtField = new JTextField (20);

        DropListener listener = new DropManagerDemo (txtField,txtField);

        ComponentAdapter componentAdapter;
       
        Container c = getContentPane ();
        c.setLayout (new BorderLayout ());


        JPanel buttons = new JPanel ();
        JLabel lbl,lbl2,lbl3,lbl4;


       

        lbl=new JLabel("Answer2");
        String message2=lbl.getText();


        buttons.add (lbl);
        lbl.addMouseListener (componentAdapter = new ComponentAdapter (glassPane, message2));
        componentAdapter.addDropListener (listener);
        lbl.addMouseMotionListener (new MotionAdapter (glassPane));



        lbl2=new JLabel("Answer3");
        String message3=lbl2.getText();


        buttons.add (lbl2);
        lbl2.addMouseListener (componentAdapter = new ComponentAdapter (glassPane, message3));
        componentAdapter.addDropListener (listener);
        lbl2.addMouseMotionListener (new MotionAdapter (glassPane));


        lbl3=new JLabel("Answer4");
        String message4=lbl2.getText();


        buttons.add (lbl3);
        lbl3.addMouseListener (componentAdapter = new ComponentAdapter (glassPane, message4));
        componentAdapter.addDropListener (listener);
        lbl3.addMouseMotionListener (new MotionAdapter (glassPane));


        lbl4=new JLabel("Answer5");
        String message5=lbl4.getText();


        buttons.add (lbl4);
        lbl4.addMouseListener (componentAdapter = new ComponentAdapter (glassPane, message5));
        componentAdapter.addDropListener (listener);
        lbl4.addMouseMotionListener (new MotionAdapter (glassPane));





        DropManagerDemo obj = new DropManagerDemo (glassPane,txtField);

        c.add (BorderLayout.SOUTH, buttons);

        JScrollPane scrollPane = new JScrollPane (txtField);
        scrollPane.addMouseListener (new ComponentAdapter (glassPane, "Textfield"));
        scrollPane.addMouseMotionListener (new MotionAdapter (glassPane));


        c.add (BorderLayout.CENTER, scrollPane);

        JPanel headerPanel = new JPanel (new BorderLayout ());
        HeaderPanel header = new HeaderPanel ();
        headerPanel.add (BorderLayout.NORTH, header);
        headerPanel.add (BorderLayout.SOUTH, new JSeparator (JSeparator.HORIZONTAL));
        headerPanel.setBorder (new EmptyBorder (0, 0, 6, 0));
        c.add (BorderLayout.NORTH, headerPanel);


        pack ();
        setResizable (false);
        setLocationRelativeTo (null);
    }


    public static void main (String [] args)
    {
        DragnDemo demo = new DragnDemo ();
        demo.setVisible (true);
    }
}




[U]DropAdapter.java[/U]
import java.awt.event.MouseAdapter;
import java.util.ArrayList;
import java.util.List;
import java.util.Iterator;

public class DropAdapter extends MouseAdapter {
    protected GlassPane glassPane;
        protected String action;

        private List listeners;

    public DropAdapter(GlassPane glassPane, String action) {
        this.glassPane = glassPane;
        this.action = action;
        this.listeners = new ArrayList();
    }

    public void addDropListener(DropListener listener) {
        if (listener != null)
            listeners.add(listener);
    }

    public void removeDropListener(DropListener listener) {
        if (listener != null)
            listeners.remove(listener);
    }

    protected void fireDropEvent(DropEvent evt) {
        Iterator it = listeners.iterator();
        while (it.hasNext()) {
                ((DropListener) it.next()).Dropped(evt);
        }
    }
}


[U]DropEvent.java[/U]
import java.awt.Point;

public class DropEvent {
        private Point point;
        private String action;

        public DropEvent(String action, Point point) {
                this.action = action;
                this.point = point;
        }

        public String getAction() {
                return action;
        }

        public Point getDropLocation() {
                return point;
        }
}



[U]DropListener.java[/U]
public interface DropListener
{
        public void Dropped(DropEvent e);
}


[U]DropManagerDemo.java[/U]
import java.awt.Point;
import javax.swing.JComponent;
import javax.swing.JOptionPane;
import javax.swing.*;

public class DropManagerDemo extends AbstractDropManager {
    private JComponent target;
    JTextField testF;

    public DropManagerDemo(JComponent target,JTextField tF) {
        super(target);
        testF = tF;
    }

        public void Dropped(DropEvent e) {
          String action = e.getAction();
          Point p = getTranslatedPoint(e.getDropLocation());

          if (isInTarget(p))
          {
              testF.setText(action);
          }
        }
}


[U]GlassPane.java[/U]
import java.awt.AlphaComposite;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.image.BufferedImage;

import javax.swing.JPanel;

public class GlassPane extends JPanel
{
        private AlphaComposite composite;
    private BufferedImage dragged = null;
    private Point location = new Point(0, 0);

    public GlassPane()
    {
        setOpaque(false);
        composite = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.5f);
    }

    public void setImage(BufferedImage dragged)
    {
        this.dragged = dragged;
    }

    public void setPoint(Point location)
    {
        this.location = location;
    }

    public void paintComponent(Graphics g)
    {
        if (dragged == null)
            return;

        Graphics2D g2 = (Graphics2D) g;
        g2.setComposite(composite);
        g2.drawImage(dragged,
                    (int) (location.getX() - (dragged.getWidth(this)  / 2)),
                    (int) (location.getY() - (dragged.getHeight(this) / 2)),
                    null);
    }
}




[U]HeaderPanel.java[/U]
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GridLayout;
import java.awt.Paint;
import javax.swing.ImageIcon;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.border.EmptyBorder;

public class HeaderPanel extends JPanel {

    public HeaderPanel() {
       
        JPanel titres = new JPanel(new GridLayout(3, 1));
        titres.setOpaque(false);
        titres.setBorder(new EmptyBorder(12, 0, 12, 0));

        JLabel titreEnTete = new JLabel("Welcome");
        Font police = titreEnTete.getFont().deriveFont(Font.BOLD);
        titreEnTete.setFont(police);
        titreEnTete.setBorder(new EmptyBorder(0, 12, 0, 0));
        titres.add(titreEnTete);

        JLabel titre;
        titres.add(titre = new JLabel("What is a class"));
        police = titreEnTete.getFont().deriveFont(Font.PLAIN);
        titre.setFont(police);
        titre.setBorder(new EmptyBorder(0, 12, 0, 0));
       

        add(BorderLayout.WEST, titres);
        add(BorderLayout.EAST, titre);
    }
}


[U]MotionAdapter.java[/U]
import java.awt.Component;
import java.awt.Point;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;

import javax.swing.SwingUtilities;

public class MotionAdapter extends MouseMotionAdapter
{
    private GlassPane glassPane;

        public MotionAdapter(GlassPane glassPane) {
                this.glassPane = glassPane;
        }

        public void mouseDragged(MouseEvent e)
    {
        Component c = e.getComponent();

        Point p = (Point) e.getPoint().clone();
        SwingUtilities.convertPointToScreen(p, c);
        SwingUtilities.convertPointFromScreen(p, glassPane);
        glassPane.setPoint(p);

        glassPane.repaint();
    }
}

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please run the DrannDemo.java class.
What i am doing:-
here in two text field and some labels, dragging the labels into text fields is happing here, dat is what i want, but the problem is when i m adding new TextFields here, i m nt be able to drop the labels into that newly added text field..

Initally there was one text field and i added one more nd i make the changes in DropManagerDemo.java , earlier DropManagerDemo.java was like this:-

Code:

---

import java.awt.Point;
import javax.swing.JComponent;
import javax.swing.JOptionPane;
import javax.swing.*;

public class DropManagerDemo extends AbstractDropManager {
    private JComponent target;
    JTextField testF;

    public DropManagerDemo(JComponent target,JTextField tF) {
        super(target);
        testF = tF;
    }

        public void Dropped(DropEvent e) {
          String action = e.getAction();
          Point p = getTranslatedPoint(e.getDropLocation());

          if (isInTarget(p))
          {
              testF.setText(action);
          }
        }
}

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i add one more textfield in DropMangerDemo constructer, and add an else part, as shown in my earlier DropManagerDemo.java class now it's working but only for two text fields.

Question:

What can i do to add more TextFields???
please help me to figure out this as soon as possble..
i m also attaching a zip file(Containing all the files) with my thread if anyone don't want to copy and paste all the code from here.

Thanks...

Quote:

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Originally Posted by punitjain

Here is my code:

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Really? to me it looks like it was lifted from geometrees - geometrees game class - Google Project Hosting

Oh, and cross posted: Drag and Drop problem.. (Swing / AWT / SWT / JFace forum at JavaRanch)

db

Yes it is, nd i have also posted this thread on code ranch, i will be appreciable if u help me in this...