Only one character in a JTextPane using a DefaultStyledDocument

Question

Heya,
I'm developing a program to read and filter some big traces file and I'm having a little problem now.
I've done a small text program, with the class MyFile, MyDocument, FileViewer and Test, I try to load myDocument in a JTextPane but I only see the first character of the document. Maybe I nedd to implement more function in MyDocument class, I've also read some thing about the Element but I'm a little loose, I don't know which way to choose for my test.
Hope you could help me,
Thanks.

Answer 1

Here a part of my code FileViewer class
         * Set properties of the components
        mainWindowApplication.setTitle("Traces Restit Test");
        mainWindowApplication.setSize(640, 480);
        //tracesTextPane.setText("test");
        //tracesTextPane.setContentType("DefaultStyledDocument");
        tracesTextPane.setEditable(false);
        tracesTextPane.getCaret().setVisible(true);
        // Creation of the scrollable areas - ENTRAINE UN BUG ET NE FONCTIONNE PAS VRAIMENT
        //scrollTraces = new JScrollPane(tracesTextPane,JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED) ;
        loadFileButton.setText("Go test !");
        colorLineButton.setText("Color 1/2 !");
        clearButton.setText("Clear !");
        exitButton.setText("Quit");
        myDocument = GUI_myDocument;      
         * Style, red letter
        final Style styleRed = tracesTextPane.addStyle("Red", null);
        StyleConstants.setForeground(styleRed, Color.red);
        StyleConstants.setFontSize(styleRed, 14);
         * Odd line will be in red, pair line are keeped in black
        for (int lineNumber = 0; lineNumber < myDocument.myFile.getNumberOfLines();
                lineNumber++) {
            if ((lineNumber % 2) == 0) {
                // Get the line
                int offsetBeginLine = myDocument.getOffsetBeginLine(lineNumber);
                int offsetEndLine = myDocument.getOffsetEndLine(lineNumber);
                int lengthLine = myDocument.getLengthLine(offsetBeginLine,
                        offsetEndLine);
                // Odd line in red
                myDocument.setCharacterAttributes(offsetBeginLine, lengthLine,
                    tracesTextPane.getStyle("Red"), true);
        // TEST
        //myDocument.setCharacterAttributes(0, 5,tracesTextPane.getStyle("Red"), true);
         * Initialisation of the reading task progressBar
        taskProgressBar = new JProgressBar(0);
        taskProgressBar.setValue(0);
        taskProgressBar.setStringPainted(true);
         * Specify LayoutManagers to arrange components in the containers
        mainWindowApplication.getContentPane().setLayout(new BorderLayout());
        buttonPanel.setLayout(new FlowLayout());
        tracesPanel.setLayout(new BorderLayout());
         * Add components to containers, layout constraints
        buttonPanel.add(taskProgressBar);
        buttonPanel.add(loadFileButton);
        buttonPanel.add(colorLineButton);
        buttonPanel.add(clearButton);
        buttonPanel.add(exitButton);
        //tracesPanel.add(scrollTraces);
        tracesPanel.add(tracesTextPane);
        mainWindowApplication.getContentPane().add(tracesPanel, "Center");
        mainWindowApplication.getContentPane().add(buttonPanel, "South");