Override paste function jtextpane

Question

Hello,
Is there a way how i can override the default paste function in a JTextPane?
My goal, paste the cilpboard in the JTextPane in a formatted (with styles) way.
maybe these code -snips can help:
                logPane = new JTextPane();
          logPane.setContentType("text/plain");
          doc = new DefaultStyledDocument();
          //ADD Key listener (paste)
          logPane.getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_V,0,true),"pasteKey");
          logPane.getActionMap().put("pasteKey", pasteKey);
Action pasteKey = new AbstractAction() {
              public void actionPerformed(ActionEvent e) {
                  logger.debug("Pushed paste");
Edited by: Mooner on Apr 21, 2009 9:47 PM                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           

Answer 1

Camickr,
Thanks for the reply!
Indeed the paste-function is done by Control-V in a JTextPane, but that just the thin i want to override.
When i paste (press ctrl+v) i want to first format the text (with the addtext() methode) before paste it to the JTextPane
I've create a SSCCE:
package es.jes.LogViewer.gui.logPanel;
import java.awt.Color;
import java.awt.Toolkit;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextPane;
import javax.swing.KeyStroke;
import javax.swing.SwingUtilities;
import javax.swing.text.BadLocationException;
import javax.swing.text.DefaultStyledDocument;
import javax.swing.text.Style;
import javax.swing.text.StyleConstants;
import javax.swing.text.StyledDocument;
import es.jes.LogViewer.gui.MainGui;
import es.jes.LogViewer.gui.logPanel.tail.fileTailer;
public class SSCCELogField extends JFrame {
     private StyledDocument doc;
     private JTextPane logPane;
     private File logFileName;
     private fileTailer tailer;
     private Style currentUsedStyle;
     private int lineNr = 0;
     public SSCCELogField(File logFileName){          
          super();
          this.logFileName = logFileName;
          logPane = new JTextPane();
          logPane.setContentType("text/plain");
          doc = new DefaultStyledDocument();
          //ADD Key listener (paste)
          logPane.getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_V,0,true),"pasteKey");
          logPane.getActionMap().put("pasteKey", pasteKey);
          initStyles();
          //SET initial style
          currentUsedStyle = doc.getStyle("warnStyle");
          JScrollPane scrollPaneLogField = new JScrollPane(logPane);     
          this.add(scrollPaneLogField);
          this.setSize(800, 600);
          readLogFile();          
          logPane.setStyledDocument(doc);
      Action pasteKey = new AbstractAction() {
              public void actionPerformed(ActionEvent e) {
                  System.out.println("Pushed paste");
     private void readLogFile() {
        BufferedReader fileReader = null;
        try {
            fileReader = new BufferedReader(new FileReader(logFileName));
            String line;
            while( (line = fileReader.readLine()) != null ){
                addText(line);
                line = fileReader.readLine();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        finally {
            if (fileReader != null){
                try {
                    fileReader.close();
                } catch (IOException exp) {
                    exp.printStackTrace();
     public void addText(String text){
          lineNr++;     
          if (text.startsWith("E")){
                currentUsedStyle = doc.getStyle("errorStyle");
           else if (text.startsWith("I")){
                currentUsedStyle = doc.getStyle("infoStyle");
           else if (text.startsWith("W")){
                currentUsedStyle = doc.getStyle("warnStyle");
           else if (text.startsWith("D")){
                currentUsedStyle = doc.getStyle("debugStyle");
          try {
               text = text + "\n";
              doc.insertString(doc.getLength(), text, currentUsedStyle);
          } catch (BadLocationException e) {
               e.printStackTrace();
     public static String getClipboard() {
          // get the system clipboard
          Clipboard systemClipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
          // get the contents on the clipboard in a transferable object
          Transferable clipboardContents = systemClipboard.getContents(null);
          // check if clipboard is empty
          if (clipboardContents == null) {
               return ("Clipboard is empty!!!");
          } else
               try {
                    // see if DataFlavor of DataFlavor.stringFlavor is supported
                    if (clipboardContents.isDataFlavorSupported(DataFlavor.stringFlavor)) {
                         // return text content
                         String returnText =(String) clipboardContents.getTransferData(DataFlavor.stringFlavor);
                         return returnText;
               } catch (UnsupportedFlavorException ufe) {
                    ufe.printStackTrace();
               } catch (IOException ioe) {
                    ioe.printStackTrace();
          return null;
     private void initStyles() {
          //SET Style
          String font = "Courier New";
          int size = 14;
          Style errorStyle = doc.addStyle("errorStyle", null);
        StyleConstants.setFontFamily(errorStyle, font);
        StyleConstants.setFontSize(errorStyle, size);
        StyleConstants.setForeground(errorStyle, Color.RED);
        StyleConstants.setBackground(errorStyle, Color.WHITE);
        Style infoStyle = doc.addStyle("infoStyle", null);
        StyleConstants.setFontFamily(infoStyle, font);
        StyleConstants.setFontSize(infoStyle, size);
        StyleConstants.setForeground(infoStyle, Color.BLUE);
        StyleConstants.setBackground(infoStyle, Color.WHITE);
        Style warnStyle = doc.addStyle("warnStyle", null);
        StyleConstants.setFontFamily(warnStyle, font);
        StyleConstants.setFontSize(warnStyle, size);
        StyleConstants.setForeground(warnStyle, Color.DARK_GRAY);
        StyleConstants.setBackground(warnStyle, Color.WHITE);
        Style debugStyle = doc.addStyle("debugStyle", null);
        StyleConstants.setFontFamily(debugStyle, font);
        StyleConstants.setFontSize(debugStyle, size);
        StyleConstants.setForeground(debugStyle, Color.GRAY);
        StyleConstants.setBackground(debugStyle, Color.WHITE);
     public static void main(String[] args) {
          SwingUtilities.invokeLater(new Runnable() {
               public void run() {
                    SSCCELogField inst = new SSCCELogField(new File("F:\\logfile.log"));
                    inst.setLocationRelativeTo(null);
                    inst.setVisible(true);
}