Allow user handwriten marking on images - Java, Swing

Question

I am developing an application using Java, Swing. It will be mainly used in order to study oscillograms against pentagrams for medical purposes. It is wished that the user can keep notes on top of the images (presumably something like the pencil used in Window's paint).

Please, keep in mind that every time the user loads an image, the following mouse motion listener gets attached to it (in order to make the image draggable for usability reasons):

public class DragMouseListener implements MouseMotionListener {

    JLabel jl;
    int imageX, imageY;

    public DragMouseListener(JLabel jlabel) {
        this.jl = jlabel;
        jl.addMouseMotionListener(this);
    }


    @Override
    public void mouseDragged(MouseEvent e) {
        updateImagePosition(e);
    }

    @Override
    public void mouseMoved(MouseEvent e) {
    }

    private void updateImagePosition(MouseEvent e) {
        imageX = e.getX();
        imageY = e.getY();
        jl.setLocation(imageX, imageY);
    }
}

Until now I am unable to even come close to a way of implementing it and I cannot find any references of the issue in the Internet. Any help (even rough ideas) would be much appreciated. Thanks in advance.

Nick

Answer 1

I tried what you asked for DragMouseListener but found it very uncomfortable so used JInternal Frame it works fine(but you can still drag images inside JInternal Frame,as I implemented what you asked for).Insted of hand free writing,I used JEditorPane (you can add hand written thing if you want,but it will be a mess) with accessible parent JScrollPane so that you can type how much you want.

You can drag JInternal Frame easily:

Note: I have used NetBeans GUI Builder for this and suggest you too to use any GUI builder as it makes typing work easy.

Here is the code:

import java.awt.event.MouseEvent;

public class Move extends javax.swing.JFrame {

public Move() {
    initComponents();
}

@SuppressWarnings("unchecked")

private void initComponents() {

    jPanel1 = new javax.swing.JPanel();
    jInternalFrame1 = new javax.swing.JInternalFrame();
    jLabel1 = new javax.swing.JLabel();
    jScrollPane1 = new javax.swing.JScrollPane();
    jEditorPane1 = new javax.swing.JEditorPane();
    jInternalFrame2 = new javax.swing.JInternalFrame();
    jLabel2 = new javax.swing.JLabel();
    jScrollPane2 = new javax.swing.JScrollPane();
    jEditorPane2 = new javax.swing.JEditorPane();

    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

    jPanel1.setBackground(new java.awt.Color(0, 0, 0));

    jInternalFrame1.setVisible(true);

    jLabel1.setIcon(new javax.swing.ImageIcon(getClass().getResource("/images.jpg"))); // NOI18N
    jLabel1.setText("jLabel1");
    jLabel1.addComponentListener(new java.awt.event.ComponentAdapter() {
        public void componentMoved(java.awt.event.ComponentEvent evt) {
            jLabel1ComponentMoved(evt);
        }
    });
    jLabel1.addMouseMotionListener(new java.awt.event.MouseMotionAdapter() {
        public void mouseDragged(java.awt.event.MouseEvent evt) {
            jLabel1MouseDragged(evt);
        }
    });

    jScrollPane1.setViewportView(jEditorPane1);

    javax.swing.GroupLayout jInternalFrame1Layout = new javax.swing.GroupLayout(jInternalFrame1.getContentPane());
    jInternalFrame1.getContentPane().setLayout(jInternalFrame1Layout);
    jInternalFrame1Layout.setHorizontalGroup(
        jInternalFrame1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(jInternalFrame1Layout.createSequentialGroup()
            .addContainerGap()
            .addGroup(jInternalFrame1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 203, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jLabel1, 0, 0, Short.MAX_VALUE))
            .addContainerGap())
    );
    jInternalFrame1Layout.setVerticalGroup(
        jInternalFrame1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(jInternalFrame1Layout.createSequentialGroup()
            .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 38, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT_SIZE, 250, Short.MAX_VALUE)
            .addContainerGap())
    );

    jInternalFrame2.setVisible(true);

    jLabel2.setIcon(new javax.swing.ImageIcon("E:\\untitled.png")); // NOI18N
    jLabel2.setText("jLabel2");

    jScrollPane2.setViewportView(jEditorPane2);

    javax.swing.GroupLayout jInternalFrame2Layout = new javax.swing.GroupLayout(jInternalFrame2.getContentPane());
    jInternalFrame2.getContentPane().setLayout(jInternalFrame2Layout);
    jInternalFrame2Layout.setHorizontalGroup(
        jInternalFrame2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(jInternalFrame2Layout.createSequentialGroup()
            .addContainerGap()
            .addGroup(jInternalFrame2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addComponent(jScrollPane2, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, 222, Short.MAX_VALUE)
                .addComponent(jLabel2, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.PREFERRED_SIZE, 222, Short.MAX_VALUE))
            .addContainerGap())
    );
    jInternalFrame2Layout.setVerticalGroup(
        jInternalFrame2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(jInternalFrame2Layout.createSequentialGroup()
            .addContainerGap()
            .addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 36, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
            .addComponent(jLabel2)
            .addContainerGap(40, Short.MAX_VALUE))
    );

    javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
    jPanel1.setLayout(jPanel1Layout);
    jPanel1Layout.setHorizontalGroup(
        jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(jPanel1Layout.createSequentialGroup()
            .addContainerGap()
            .addComponent(jInternalFrame1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addGap(177, 177, 177)
            .addComponent(jInternalFrame2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addContainerGap(71, Short.MAX_VALUE))
    );
    jPanel1Layout.setVerticalGroup(
        jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
            .addGap(49, 49, 49)
            .addComponent(jInternalFrame1)
            .addGap(209, 209, 209))
        .addGroup(jPanel1Layout.createSequentialGroup()
            .addGap(31, 31, 31)
            .addComponent(jInternalFrame2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addContainerGap(166, Short.MAX_VALUE))
    );

    javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
    getContentPane().setLayout(layout);
    layout.setHorizontalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
    );
    layout.setVerticalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
    );

    pack();
}

private void jLabel1ComponentMoved(java.awt.event.ComponentEvent evt) {


}

private void jLabel1MouseDragged(java.awt.event.MouseEvent evt) {
   updateImagePosition(evt);

}
private void updateImagePosition(MouseEvent evt) {
   int imageX = evt.getX();
 int   imageY = evt.getY();
    jLabel1.setLocation(imageX, imageY);
}
public static void main(String args[]) {
    java.awt.EventQueue.invokeLater(new Runnable() {
        public void run() {
            new Move().setVisible(true);
        }
    });
}


private javax.swing.JEditorPane jEditorPane1;
private javax.swing.JEditorPane jEditorPane2;
private javax.swing.JInternalFrame jInternalFrame1;
private javax.swing.JInternalFrame jInternalFrame2;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JPanel jPanel1;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JScrollPane jScrollPane2;


}

UPDATE :

See This post answerd by @mKorbel and @trashgod to make JInternal frame minimize/maximize and resize.Great answers.