Examples of javax.swing.text.DocumentFilter

javax.swing.text.DocumentFilter
DocumentFilter, as the name implies, is a filter for the Document mutation methods. When a Document containing a DocumentFilter is modified (either through insert or remove), it forwards the appropriate method invocation to the DocumentFilter. The default implementation allows the modification to occur. Subclasses can filter the modifications by conditionally invoking methods on the superclass, or invoking the necessary methods on the passed in FilterBypass. Subclasses should NOT call back into the Document for the modification instead call into the superclass or the FilterBypass.
When remove or insertString is invoked on the DocumentFilter, the DocumentFilter may callback into the FilterBypass multiple times, or for different regions, but it should not callback into the FilterBypass after returning from the remove or insertString method.
By default, text related document mutation methods such as insertString, replace and remove in AbstractDocument use DocumentFilter when available, and Element related mutation methods such as create, insert and removeElement in DefaultStyledDocument do not use DocumentFilter. If a method doesn't follow these defaults, this must be explicitly stated in the method documentation. @see javax.swing.text.Document @see javax.swing.text.AbstractDocument @see javax.swing.text.DefaultStyledDocument @since 1.4

    text.setAutoscrolls(true);
    
    // No editing before startPos
    if (text.getDocument() instanceof AbstractDocument)
      ((AbstractDocument) text.getDocument())
          .setDocumentFilter(new DocumentFilter() {
            public void insertString(
                DocumentFilter.FilterBypass fb, int offset,
                String string, AttributeSet attr)
                throws BadLocationException {
              if (offset >= startPos)

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        area.addKeyListener(this);
        
        // No editing before startPos
        if (area.getDocument() instanceof AbstractDocument)
            ((AbstractDocument) area.getDocument()).setDocumentFilter(
                new DocumentFilter() {
                    public void insertString(DocumentFilter.FilterBypass fb, int offset, String string, AttributeSet attr) throws BadLocationException {
                        if (offset >= startPos) super.insertString(fb, offset, string, attr);
                    }
                    
                    public void remove(DocumentFilter.FilterBypass fb, int offset, int length) throws BadLocationException {

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    }


    protected DocumentFilter filter;


    protected DocumentFilter getDocumentFilter() {
        DocumentFilter filter = getFilter();
        if (filter != null)
            return filter;


        return super.getDocumentFilter();
    }

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    }


    protected DocumentFilter filter;


    protected DocumentFilter getDocumentFilter() {
        DocumentFilter filter = getFilter();
        if (filter != null)
            return filter;


        return super.getDocumentFilter();
    }

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    }


    protected DocumentFilter filter;


    protected DocumentFilter getDocumentFilter() {
        DocumentFilter filter = getFilter();
        if (filter != null)
            return filter;


        return super.getDocumentFilter();
    }

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        area.addKeyListener(this);
        
        // No editing before startPos
        if (area.getDocument() instanceof AbstractDocument) {
            ((AbstractDocument) area.getDocument()).setDocumentFilter(
                new DocumentFilter() {
                    public void insertString(DocumentFilter.FilterBypass fb, int offset, String string, AttributeSet attr) throws BadLocationException {
                        if (offset >= startPos) super.insertString(fb, offset, string, attr);
                    }
                    
                    public void remove(DocumentFilter.FilterBypass fb, int offset, int length) throws BadLocationException {

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    }


    public void testInstallUninstall_Filters() {
        NavigationFilter navFilter = new NavigationFilter();
        formatter.setNavigationFilter(navFilter);
        DocumentFilter docFilter = new DocumentFilter();
        formatter.setDocumentFilter(docFilter);
        AbstractDocument doc = (AbstractDocument) tf.getDocument();
        assertNull(tf.getNavigationFilter());
        assertNull(doc.getDocumentFilter());
        formatter.install(tf);

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                .setToolTipText("The text to be displayed when starting a level");
        briefingTA.setLineWrap(true);
        briefingTA.setWrapStyleWord(true);
        // the document filter restricts newline characters.
        ((AbstractDocument) briefingTA.getDocument())
                .setDocumentFilter(new DocumentFilter() {
                    public void insertString(DocumentFilter.FilterBypass fb,
                            int offset, String text, AttributeSet attr)
                            throws BadLocationException {
                        fb.insertString(offset, text.replaceAll("\n", ""), attr);
                    }

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        area.addKeyListener(this);
        
        // No editing before startPos
        if (area.getDocument() instanceof AbstractDocument) {
            ((AbstractDocument) area.getDocument()).setDocumentFilter(
                new DocumentFilter() {
                    public void insertString(DocumentFilter.FilterBypass fb, int offset, String string, AttributeSet attr) throws BadLocationException {
                        if (offset >= startPos) super.insertString(fb, offset, string, attr);
                    }
                    
                    public void remove(DocumentFilter.FilterBypass fb, int offset, int length) throws BadLocationException {

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    lblUserData2 = new JLabel4j_std(lang.get("lbl_User_Data2"));
    lblUserData2.setHorizontalAlignment(SwingConstants.TRAILING);
    lblUserData2.setBounds(288, 167, 111, 16);
    desktopPane.add(lblUserData2);


    DocumentFilter filter = new UppercaseDocumentFilter();
    textFieldUserData1 = new JTextField4j();
    textFieldUserData1.addKeyListener(new KeyAdapter()
    {


      @Override

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