Détecter une modification d'un JEditorPane?
Rebonjour,
Un deuxième problème se présente à moi!:D
Je souhaiterais savoir s'il est possible de savoir si le contenu d'un JEditorPane a été modifié pour pouvoir agir en fonction de ça!
Pour être plus explicite:
Mon JEditorPane sert de zone de saisie de texte dans le cadre de la réalisation d'un éditeur de texte.
Je souhaiterais donc récupérer cette information afin de lui proposer différents choix:
- L'utilisateur n'a pas modifié son texte depuis le dernier enregistrement ==> pas de boite de dialogue.
- L'utilisateur a modifié son texte depuis le dernier enregistrement ==> Boite de dialogue pour savoir s'il veut enregistrer avant de quitter.
Voici le code de mon EditorFrame:
Code:
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package Editor;
import java.io.*;
import java.util.StringTokenizer;
import javax.swing.*;
import java.util.regex.*;
/**
* Implements all methods of EditorSkeletonFrame.
* @author Newjc
*/
public class EditorFrame extends EditorSkeletonFrame {
private JFileChooser chooser;
private File selectedFile;
private String startPath;
private boolean alreadySave = false;
//private int nbNew = 1;
private SearchDialog searchDialog;
private SearchAndReplaceDialog srDialog;
private HelpDialog help;
private DataTransferObject dataTransfer;
/**
* Constructor.
*/
public EditorFrame() {
super();
this.startPath = "./";
}
/**
* Open a file.
*/
protected void openFile() {
if (chooser == null) {
chooser = new JFileChooser(startPath);
}
int i = chooser.showOpenDialog(this);
if (i == JFileChooser.APPROVE_OPTION) {
selectedFile = chooser.getSelectedFile();
try {
FileReader filereader = new FileReader(selectedFile);
textDisplayPane.read(filereader, null);
filereader.close();
this.setTitle(selectedFile.getPath());
} catch (IOException e) {
System.out.println("IO error");
}
}
}
/**
* Save a file.
*/
protected void saveFile() {
if (chooser == null) {
chooser = new JFileChooser(startPath);
}
if (alreadySave == false) {
int i = chooser.showSaveDialog(this);
if (i == JFileChooser.APPROVE_OPTION) {
selectedFile = chooser.getSelectedFile();
try {
FileWriter filewriter = new FileWriter(selectedFile);
filewriter.write(textDisplayPane.getText());
filewriter.close();
this.alreadySave = true;
this.setTitle(selectedFile.getPath());
} catch (IOException e) {
JOptionPane.showMessageDialog(null, "Problem during file writing");
}
}
} else {
try {
FileWriter filewriter = new FileWriter(selectedFile);
filewriter.write(textDisplayPane.getText());
filewriter.close();
JOptionPane.showMessageDialog(null, "This file has been saved");
} catch (IOException e) {
JOptionPane.showMessageDialog(null, "Problem during file saving");
}
}
}
/**
* Find a word in the textArea and call CountWord.
*/
protected void find() {
if (searchDialog == null) {
searchDialog = new SearchDialog(this);
dataTransfer = new DataTransferObject();
}
searchDialog.showIt(dataTransfer);
if (dataTransfer.getSearch()) {
this.countWord(dataTransfer.getSearchWord(), dataTransfer.getCaseSensitive());
}
}
/**
* Show how many times appear the finding word.
* @param word Mot a rechercher
* @param caseSensitive
*/
private void countWord(String word, boolean caseSensitive) {
int nbMots = 0;
String s = textDisplayPane.getText();
StringTokenizer st = new StringTokenizer(s, " \n\t,.;");
while (st.hasMoreTokens()) {
if (caseSensitive) {
if (st.nextToken().equals(word)) {
nbMots++;
}
} else {
if (st.nextToken().equalsIgnoreCase(word)) {
nbMots++;
}
}
}
JOptionPane.showMessageDialog(this, "This word appears " + nbMots + " times.");
}
/**
* Find a word in the textArea and call CountWord.
*/
protected void findAndReplace() {
if (srDialog == null) {
srDialog = new SearchAndReplaceDialog(this);
dataTransfer = new DataTransferObject();
}
srDialog.showIt(dataTransfer);
if (dataTransfer.getDoReplace()) {
this.replaceWord(dataTransfer.getSearchWord(), dataTransfer.getReplaceWord(), dataTransfer.getReplaceAll(), dataTransfer.getCaseSensitive());
}
}
/**
* Replace the search word by the replace word.
* @param searchWord
* @param replaceWord
* @param caseSensitive
*/
private void replaceWord(String searchWord, String replaceWord, boolean replaceAll, boolean caseSensitive) {
if (replaceAll) {
if (caseSensitive) {
Pattern p = Pattern.compile(searchWord);
Matcher m = p.matcher(textDisplayPane.getText());
String s = m.replaceAll(replaceWord);
textDisplayPane.setText(s);
} else {
Pattern p = Pattern.compile(searchWord, Pattern.CASE_INSENSITIVE);
Matcher m = p.matcher(textDisplayPane.getText());
String s = m.replaceAll(replaceWord);
textDisplayPane.setText(s);
}
} else {
if (caseSensitive) {
Pattern p = Pattern.compile(searchWord);
Matcher m = p.matcher(textDisplayPane.getText());
String s = m.replaceFirst(replaceWord);
textDisplayPane.setText(s);
} else {
Pattern p = Pattern.compile(searchWord, Pattern.CASE_INSENSITIVE);
Matcher m = p.matcher(textDisplayPane.getText());
String s = m.replaceFirst(replaceWord);
textDisplayPane.setText(s);
}
}
}
/**
* Show a dialogue and open the help file.
*/
protected void help() {
help = new HelpDialog(this);
}
/**
* Quit the Editor application.
*/
protected void exitEditor() {
System.exit(0);
}
/**
* Modify the value of boolean alreadySave.
* @param as
*/
protected void setAlreadySave(boolean as) {
this.alreadySave = as;
}
} |
Merci d'avance;)
Bonne journée
Newjc
