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javaswingawtdocumentjtextpane

How to work functionality for all Documents in swing

I want work functionality for all opened Documents not current open Document only. I had created one swing application. I was open an Document. The cut, copy, paste and selectAll operations through menuItem work for currently opened documents; not working for the previous opened Documents. Please help me.

Here is my code:

public class OpenDemo extends javax.swing.JFrame implements ChangeListener{
JTextPane textPane;
JTextPane lnNum;
JScrollPane scrollPane;
int i=0;
JTextField status;
ArrayList<JTextPane> textPanes=new ArrayList<>();
public OpenDemo() {
    initComponents();
    viewLineNumbers.setSelected(false);
}
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">                          
private void initComponents() {

    tp = new javax.swing.JTabbedPane();
    jMenuBar1 = new javax.swing.JMenuBar();
    jMenu1 = new javax.swing.JMenu();
    open = new javax.swing.JMenuItem();
    cut = new javax.swing.JMenuItem();
    selectAll = new javax.swing.JMenuItem();
    viewLineNumbers = new javax.swing.JCheckBoxMenuItem();

    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

    jMenu1.setText("File");

    open.setText("Open");
    open.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            openActionPerformed(evt);
        }
    });
    jMenu1.add(open);

    cut.setText("Cut");
    cut.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            cutActionPerformed(evt);
        }
    });
    jMenu1.add(cut);

    selectAll.setText("SelectAll");
    selectAll.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            selectAllActionPerformed(evt);
        }
    });
    jMenu1.add(selectAll);

    viewLineNumbers.setSelected(true);
    viewLineNumbers.setText("ViewLineNumbers");
    viewLineNumbers.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            viewLineNumbersActionPerformed(evt);
        }
    });
    jMenu1.add(viewLineNumbers);

    jMenuBar1.add(jMenu1);

    setJMenuBar(jMenuBar1);

    javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
    getContentPane().setLayout(layout);
    layout.setHorizontalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addComponent(tp, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, 400, Short.MAX_VALUE)
    );
    layout.setVerticalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addComponent(tp, javax.swing.GroupLayout.DEFAULT_SIZE, 279, Short.MAX_VALUE)
    );

    pack();
}// </editor-fold>                        
private void updateStatus(int linenumber, int columnnumber) {
status.setText("Line: " + linenumber + " Column: " + columnnumber);
}    
private void openActionPerformed(java.awt.event.ActionEvent evt) {                                     
    FileDialog fd = new FileDialog(OpenDemo.this, "Select File", FileDialog.LOAD);
    fd.show();
    String title;
    String sts;
    File f;
    if (fd.getFile() != null) {
       sts = fd.getDirectory() + fd.getFile();
       title=fd.getFile();
       System.out.println(sts);
       title=fd.getFile();
       BufferedReader br = null;
       StringBuffer str = new StringBuffer("");
       try {
           br = new BufferedReader(new FileReader(sts));
           String line;
           try {
                while ((line = br.readLine()) != null) {
                str.append(line + "\n");
                }
           } catch (IOException ex) {
                Logger.getLogger(OpenDemo.class.getName()).log(Level.SEVERE, null, ex);
             }
       } catch (FileNotFoundException ex) {
            Logger.getLogger(OpenDemo.class.getName()).log(Level.SEVERE, null, ex);
         }
       String t = str.toString(); 
       final JInternalFrame internalFrame = new JInternalFrame("",true,true);  
       textPane = new JTextPane();
       textPane.setFont(new java.awt.Font("Miriam Fixed", 0, 13));
       internalFrame.add(textPane);
       i++;
       internalFrame.setName("Doc "+i);
       internalFrame.setTitle(title);
       try {
            internalFrame.setSelected(true);
        } catch (PropertyVetoException ex) {
            Logger.getLogger(OpenDemo.class.getName()).log(Level.SEVERE, null, ex);
       }
       textPane.addCaretListener(new CaretListener() {
        @Override
       public void caretUpdate(CaretEvent e) {
          JTextPane editArea = (JTextPane)e.getSource();
          int linenum = 1;
          int columnnum = 1;
           try {
                int caretpos = editArea.getCaretPosition();
                linenum=getLineAtCaret(editArea)-1;
                columnnum=getColumnAtCaret(editArea);
                linenum += 1;
            }
            catch(Exception ex) { }
            updateStatus(linenum, columnnum);
        }
    });
       status=new JTextField();
       status.setBackground(Color.LIGHT_GRAY);
       internalFrame.add(status,BorderLayout.SOUTH);
       tp.add(internalFrame);
       scrollPane=new JScrollPane(textPane);
       tp.setSelectedIndex(i-1);  
       internalFrame.add(scrollPane);
       internalFrame.setVisible(true);   
       textPane.setText(t);
       tp.addChangeListener(this);
       textPanes.add(textPane);
       textPane.setCaretPosition(0);
}     
}                                    

private void cutActionPerformed(java.awt.event.ActionEvent evt) {                                    
    textPane.cut();
}                                   

private void selectAllActionPerformed(java.awt.event.ActionEvent evt) {                                          
    textPane.selectAll();
}                                         

private void viewLineNumbersActionPerformed(java.awt.event.ActionEvent evt) {                                                
    AbstractButton button = (AbstractButton) evt.getSource();
                  if(button.isSelected()){
                    lnNum = new JTextPane();
                    lnNum.setEditable(false);
                    lnNum.setSize(50,50);
                    lnNum.setFont(new java.awt.Font("Miriam Fixed", 0, 13));
                    lnNum.setText(getText());
                    textPane.getDocument().addDocumentListener(new DocumentListener(){
                      @Override
                      public void changedUpdate(DocumentEvent de) {
                      lnNum.setText(getText());
                    }
                   @Override
                   public void insertUpdate(DocumentEvent de) {
                    lnNum.setText(getText());
                   }
                   @Override
                   public void removeUpdate(DocumentEvent de) {
                    lnNum.setText(getText());
                   }
                  });
                   scrollPane.getViewport().add(textPane);
                   scrollPane.setRowHeaderView(lnNum); 
                   }
                   else{
                       scrollPane.setRowHeaderView(null);
                   }           
}                                               
public String getText(){
    int caretPosition = textPane.getDocument().getLength();
    javax.swing.text.Element root = textPane.getDocument().getDefaultRootElement();
    String text = "1" + System.getProperty("line.separator");
    for(int i = 2; i <=  root.getElementIndex( caretPosition ) + 1; i++){
        text += i + System.getProperty("line.separator");
    }
    return text;
 }
public static void main(String args[]) {
    try {
        for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
            if ("Nimbus".equals(info.getName())) {
                javax.swing.UIManager.setLookAndFeel(info.getClassName());
                break;
            }
        }
    } catch (ClassNotFoundException ex) {
        java.util.logging.Logger.getLogger(OpenDemo.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (InstantiationException ex) {
        java.util.logging.Logger.getLogger(OpenDemo.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (IllegalAccessException ex) {
        java.util.logging.Logger.getLogger(OpenDemo.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (javax.swing.UnsupportedLookAndFeelException ex) {
        java.util.logging.Logger.getLogger(OpenDemo.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    }
    //</editor-fold>
    java.awt.EventQueue.invokeLater(new Runnable() {
        public void run() {
            new OpenDemo().setVisible(true);
        }
    });
}

// Variables declaration - do not modify                     
private javax.swing.JMenuItem cut;
private javax.swing.JMenu jMenu1;
private javax.swing.JMenuBar jMenuBar1;
private javax.swing.JMenuItem open;
private javax.swing.JMenuItem selectAll;
private javax.swing.JTabbedPane tp;
private javax.swing.JCheckBoxMenuItem viewLineNumbers;
// End of variables declaration                   

@Override
public void stateChanged(ChangeEvent ce) {
    JTabbedPane sourceTabbedPane = (JTabbedPane) ce.getSource();
    int index = sourceTabbedPane.getSelectedIndex();
    try
    {
      textPane =textPanes.get(index);
    }
    catch(IndexOutOfBoundsException e1){
    }
}
public int getLineAtCaret(JTextComponent component)
{
    int caretPosition = component.getCaretPosition();
    Element root = component.getDocument().getDefaultRootElement();
    return root.getElementIndex( caretPosition ) + 1;
}
public int getColumnAtCaret(JTextComponent component)
{
    FontMetrics fm = component.getFontMetrics( component.getFont() );
    int characterWidth = fm.stringWidth( "0" );
    int column = 0;
    try
    {
        Rectangle r = component.modelToView( component.getCaretPosition() );
        int width = r.x - component.getInsets().left;
        column = width / characterWidth;
    }
    catch(BadLocationException ble) {}
    return column + 1;
}

}

Solution

  • I think, i managed to answer all your problems, but i needed to create another class which i called 'OInternalFrame', so i will give you both code for those class. Tell me if that's what you were trying to achieve :

    OpenDemo :

        import java.awt.FileDialog;
import java.awt.FontMetrics;
import java.awt.Rectangle;
import java.beans.PropertyVetoException;
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.swing.AbstractButton;
import javax.swing.JTabbedPane;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import javax.swing.event.InternalFrameAdapter;
import javax.swing.event.InternalFrameEvent;
import javax.swing.text.BadLocationException;
import javax.swing.text.Element;
import javax.swing.text.JTextComponent;

public class OpenDemo extends javax.swing.JFrame implements ChangeListener{



private ArrayList<OInternalFrame> frames = new ArrayList<OInternalFrame>();
private OInternalFrame currentFrame;
int i=0;
public OpenDemo() {
    initComponents();
    viewLineNumbers.setSelected(false);
}
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">                          
private void initComponents() {

    tp = new javax.swing.JTabbedPane();
    jMenuBar1 = new javax.swing.JMenuBar();
    jMenu1 = new javax.swing.JMenu();
    open = new javax.swing.JMenuItem();
    cut = new javax.swing.JMenuItem();
    selectAll = new javax.swing.JMenuItem();
    viewLineNumbers = new javax.swing.JCheckBoxMenuItem();

    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

    jMenu1.setText("File");

    open.setText("Open");
    open.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            openActionPerformed(evt);
        }
    });
    jMenu1.add(open);

    cut.setText("Cut");
    cut.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            cutActionPerformed(evt);
        }
    });
    jMenu1.add(cut);

    selectAll.setText("SelectAll");
    selectAll.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            selectAllActionPerformed(evt);
        }
    });
    jMenu1.add(selectAll);

    viewLineNumbers.setSelected(true);
    viewLineNumbers.setText("ViewLineNumbers");
    viewLineNumbers.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            viewLineNumbersActionPerformed(evt);
        }
    });
    jMenu1.add(viewLineNumbers);

    jMenuBar1.add(jMenu1);

    setJMenuBar(jMenuBar1);

    javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
    getContentPane().setLayout(layout);
    layout.setHorizontalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addComponent(tp, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, 400, Short.MAX_VALUE)
    );
    layout.setVerticalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addComponent(tp, javax.swing.GroupLayout.DEFAULT_SIZE, 279, Short.MAX_VALUE)
    );

    pack();
}// </editor-fold>                        

private void openActionPerformed(java.awt.event.ActionEvent evt) {                                     
    FileDialog fd = new FileDialog(OpenDemo.this, "Select File", FileDialog.LOAD);
    fd.show();
    String title;
    String sts;

    if (fd.getFile() != null) {
       sts = fd.getDirectory() + fd.getFile();
       title=fd.getFile();
       System.out.println(sts);
       title=fd.getFile();
       BufferedReader br = null;
       StringBuffer str = new StringBuffer("");
       try {
           br = new BufferedReader(new FileReader(sts));
           String line;
           try {
                while ((line = br.readLine()) != null) {
                str.append(line + "\n");
                }
           } catch (IOException ex) {
                Logger.getLogger(OpenDemo.class.getName()).log(Level.SEVERE, null, ex);
             }
       } catch (FileNotFoundException ex) {
            Logger.getLogger(OpenDemo.class.getName()).log(Level.SEVERE, null, ex);
         }
       String t = str.toString(); 
       OInternalFrame internalFrame = new OInternalFrame("",true,true);  


       i++;
       internalFrame.setName("Doc "+i);
       internalFrame.setTitle(title);
       try {
            internalFrame.setSelected(true);
        } catch (PropertyVetoException ex) {
            Logger.getLogger(OpenDemo.class.getName()).log(Level.SEVERE, null, ex);
       }


       internalFrame.addInternalFrameListener(new InternalFrameAdapter() {
           @Override
           public void internalFrameClosing(InternalFrameEvent e) {
               i--;

               frames.remove(currentFrame);
               tp.remove(currentFrame);
               for(OInternalFrame frame : frames)
              {
                  int index=frames.indexOf(frame);

                  tp.setTitleAt(index, "Doc "+(index+1));

              }

           }
       });
       tp.add(internalFrame);
       tp.setSelectedIndex(i-1);  



       tp.addChangeListener(this);
       frames.add(internalFrame);
       currentFrame=internalFrame;
       currentFrame.setText(t);
       currentFrame.setVisible(true);
       currentFrame.setLineViewer(viewLineNumbers.isSelected());

}     
}                                    

private void cutActionPerformed(java.awt.event.ActionEvent evt) {                                    
    currentFrame.cut();
}                                   

private void selectAllActionPerformed(java.awt.event.ActionEvent evt) {                                          
    currentFrame.selectAll();
}                                         

private void viewLineNumbersActionPerformed(java.awt.event.ActionEvent evt) {                                                
    AbstractButton button = (AbstractButton) evt.getSource();

                      currentFrame.setLineViewer(viewLineNumbers.isSelected());

}                                               
public static void main(String args[]) {
    try {
        for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
            if ("Nimbus".equals(info.getName())) {
                javax.swing.UIManager.setLookAndFeel(info.getClassName());
                break;
            }
        }
    } catch (ClassNotFoundException ex) {
        java.util.logging.Logger.getLogger(OpenDemo.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (InstantiationException ex) {
        java.util.logging.Logger.getLogger(OpenDemo.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (IllegalAccessException ex) {
        java.util.logging.Logger.getLogger(OpenDemo.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (javax.swing.UnsupportedLookAndFeelException ex) {
        java.util.logging.Logger.getLogger(OpenDemo.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    }
    //</editor-fold>
    java.awt.EventQueue.invokeLater(new Runnable() {
        public void run() {
            new OpenDemo().setVisible(true);
        }
    });
}

// Variables declaration - do not modify                     
private javax.swing.JMenuItem cut;
private javax.swing.JMenu jMenu1;
private javax.swing.JMenuBar jMenuBar1;
private javax.swing.JMenuItem open;
private javax.swing.JMenuItem selectAll;
private javax.swing.JTabbedPane tp;
private javax.swing.JCheckBoxMenuItem viewLineNumbers;
// End of variables declaration                   

@Override
public void stateChanged(ChangeEvent ce) {
    JTabbedPane sourceTabbedPane = (JTabbedPane) ce.getSource();
    int index = sourceTabbedPane.getSelectedIndex();
    try
    {
      currentFrame =frames.get(index);
      currentFrame.setLineViewer(viewLineNumbers.isSelected());
    }
    catch(IndexOutOfBoundsException e1){
    }
}
public int getLineAtCaret(JTextComponent component)
{
    int caretPosition = component.getCaretPosition();
    Element root = component.getDocument().getDefaultRootElement();
    return root.getElementIndex( caretPosition ) + 1;
}
public int getColumnAtCaret(JTextComponent component)
{
    FontMetrics fm = component.getFontMetrics( component.getFont() );
    int characterWidth = fm.stringWidth( "0" );
    int column = 0;
    try
    {
        Rectangle r = component.modelToView( component.getCaretPosition() );
        int width = r.x - component.getInsets().left;
        column = width / characterWidth;
    }
    catch(BadLocationException ble) {}
    return column + 1;
}
}

    OInternalFrame :

        import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FontMetrics;
import java.awt.Rectangle;

import javax.swing.JInternalFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.JTextPane;
import javax.swing.event.CaretEvent;
import javax.swing.event.CaretListener;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import javax.swing.text.BadLocationException;
import javax.swing.text.Element;
import javax.swing.text.JTextComponent;


public class OInternalFrame extends JInternalFrame
{
    private JTextArea textPane;
    private JScrollPane scrollPane;
    private JTextPane linePane;
    private JTextField status;
    private DocumentListener listen;
    public OInternalFrame(String title,boolean resizable,boolean closable)
    {
        super(title,resizable,closable);
        initComponents();
        initListeners();
    }
    private void initComponents()
    {

        textPane = new JTextArea();
        linePane = new JTextPane();
        status = new JTextField();
        scrollPane = new JScrollPane();
        textPane.setFont(new java.awt.Font("Miriam Fixed", 0, 13));
        status.setBackground(Color.LIGHT_GRAY);

        linePane.setEditable(false);
        linePane.setSize(50,50);
        linePane.setFont(new java.awt.Font("Miriam Fixed", 0, 13));
        status.setEditable(false);
//        add(textPane);

        add(scrollPane);

        add(status,BorderLayout.SOUTH);
        scrollPane.getViewport().add(textPane);
        scrollPane.setRowHeaderView(linePane); 
        setVisible(true);
        linePane.setVisible(false);
        updateStatus(1,1);
        scrollPane.setVisible(true);

    }
    private void initListeners()
    {
        textPane.addCaretListener(new CaretListener() {
            @Override
            public void caretUpdate(CaretEvent e) {

                int linenum = 1;
                int columnnum = 1;
                try {
                    int caretpos = textPane.getCaretPosition();
                    linenum=getLineAtCaret()-1;
                    columnnum=getColumnAtCaret();
                    linenum += 1;
                }
                catch(Exception ex) { }
                updateStatus(linenum, columnnum);
            }
        });
        listen = new DocumentListener(){
            @Override
            public void changedUpdate(DocumentEvent de) {
            linePane.setText(getText());
          }
         @Override
         public void insertUpdate(DocumentEvent de) {
          linePane.setText(getText());
         }
         @Override
         public void removeUpdate(DocumentEvent de) {
          linePane.setText(getText());
         }
        };


         }

    public int getLineAtCaret()
    {   
        int line = 0;
        int caretPosition = textPane.getCaretPosition();


        try {
            line = textPane.getLineOfOffset(caretPosition);

        } catch (BadLocationException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return line+1;
    }

    public int getColumnAtCaret()
    {
        FontMetrics fm = textPane.getFontMetrics( textPane.getFont() );
        int characterWidth = fm.stringWidth( "0" );
        int column = 0;
        try
        {
            Rectangle r = textPane.modelToView( textPane.getCaretPosition() );
            int width = r.x - textPane.getInsets().left;
            column = width / characterWidth;
        }
        catch(BadLocationException ble) {}
        return column + 1;
    }

    private void updateStatus(int linenumber, int columnnumber) 
    {
        status.setText("Line: " + linenumber + " Column: " + columnnumber);
    }    


    public void setText(String t)
    {
        System.out.println(t);

        textPane.setText(t);

        textPane.setCaretPosition(0);
        textPane.setVisible(true);
        textPane.repaint();
    }
    public void setLineViewer(boolean enabled)
    {
        if(enabled)
        {
        linePane.setText(getText());
        linePane.setCaretPosition(0);
        linePane.revalidate();
        linePane.repaint();

        textPane.getDocument().addDocumentListener(listen);
        }
        else
        {
            linePane.setText("");
            textPane.getDocument().removeDocumentListener(listen);
        }


        linePane.setVisible(enabled);
    }
    public void cut()
    {
        textPane.cut();
    }
    public void selectAll()
    {
        textPane.selectAll();
    }
    public String getText(){
        int caretPosition = textPane.getLineCount();

        String text = "1" + System.getProperty("line.separator");
        for(int i = 2; i <=  caretPosition-1; i++){
            text += i + System.getProperty("line.separator");
        }
        return text;
     }
}