Hi,

I have a problem of modifying Jtree font. No matter what I do or make changes in code I'm unable to change the default font. I got the TreeCellRenderer code from some website. Any suggesion on font change would be really helpful

class MyCellRenderer extends JEditorPane implements TreeCellRenderer 
    {
        JEditorPane dummy = new JEditorPane();
        final Font TABLE_FONT = new Font("SansSerif", Font.PLAIN, 12);
        final Font TABLE_FONT_SELECTED = new Font("SansSerif", Font.BOLD, 12);
        final Font TABLE_FONT_ROOT = new Font("SansSerif", Font.ITALIC, 12);
        MyCellRenderer() {
            setContentType("text/html");
            dummy.setContentType("text/html");
            dummy.setFont(new FontUIResource("Helvetica",Font.BOLD,2));
            dummy.setFont(new Font("Helvetica",Font.BOLD,2));
            dummy.setBackground(UIManager.getColor(test.p6.getBackground()));
        }

        public Component getTreeCellRendererComponent(javax.swing.JTree tree,Object obj,boolean isSelected,
                boolean isExtended,
                boolean isLeaf, int
                row,
                boolean hasFocus) 
        {
            setFont(new Font("Tahoma", Font.BOLD, 12));
            setText( (String) obj.toString());
            setEditable(false);
            setBackground(test.p6.getBackground());
            return this;
        }

        public Dimension getPreferredSize() {
            dummy.setText(getText());

            dummy.setSize(w - offset, Integer.MAX_VALUE);
            Dimension d = dummy.getPreferredScrollableViewportSize();
            return new Dimension(w - offset, d.height);
        }
    }

    class MyCellEditor
    extends JTextPane
    implements TreeCellEditor {
        JEditorPane dummy = new JEditorPane();
        final Font TABLE_FONT_SELECTED = new Font("SansSerif", Font.BOLD, 12);
        public MyCellEditor() {
            this.setContentType("text/html");
            dummy.setContentType("text/html");
        }

        public Component getTreeCellEditorComponent(javax.swing.JTree tree,
                Object value,
                boolean isSelected,
                boolean isExpanded,
                boolean isLeaf,
                int row
                ) 
        {
            this.setFont(TABLE_FONT_SELECTED);
            String txt = value.toString();
            this.setText(txt);
            this.setEditable(false);
            setFont(getFont().deriveFont(Font.BOLD));
            this.setBackground(test.p6.getBackground());
            return this;

        }

        public Dimension getPreferredSize() {
            dummy.setText(getText());
            dummy.setFont(TABLE_FONT_SELECTED);
            dummy.setSize(w - offset, Integer.MAX_VALUE);
            Dimension d = dummy.getPreferredScrollableViewportSize();
            return new Dimension(w - offset, d.height);
        }

        public void cancelCellEditing() {
            this.setEditable(false);
        }

        public boolean isCellEditable(EventObject event) {
            return true;
        }

        public Object getCellEditorValue() {
            setFont(getFont().deriveFont(Font.BOLD));
            return this.getText();
        }

        public boolean shouldSelectCell(EventObject event) {
            return false;
        }

        public void addCellEditorListener(CellEditorListener l) {}

        public void removeCellEditorListener(CellEditorListener l) {}

        public boolean stopCellEditing() {
            return true;
        }

    }


    public void tree4motif(final String data4tree)
    {


        test.pmotif.removeAll();
        //System.out.println(data4tree);
        String[] para = data4tree.split("@");


        DefaultMutableTreeNode root = new DefaultMutableTreeNode("Motifs");
        DefaultMutableTreeNode motif_name = null;
        DefaultMutableTreeNode motif_value = null;
        DefaultMutableTreeNode motif_qname = null;
        DefaultMutableTreeNode motif_ori = null;
        DefaultMutableTreeNode motif_style = null;
        DefaultMutableTreeNode motif_parentname = null;
        DefaultMutableTreeNode motif_parenttransform = null;
        DefaultMutableTreeNode Result= null; 
        DefaultMutableTreeNode Readout= null; 

        DefaultMutableTreeNode qualifiers = null;

        for (String y : para)
        {

            String[] fin = y.split("#");
            for (String data : fin)
            {
                String[] l = data.split(":");
                if(l[0].trim().equals("motif name"))
                {
                    motif_name = new DefaultMutableTreeNode(Character.toUpperCase(l[0].trim().charAt(0))+ l[0].trim().substring(1)+": " +l[1].trim());
                    root.add(motif_name);

                }

                else if(l[0].trim().equals("value"))
                {

                    motif_value = new DefaultMutableTreeNode(Character.toUpperCase(l[0].trim().charAt(0))+ l[0].trim().substring(1)+": " +l[1].trim());

                    qualifiers.add(motif_value);
                }
                else if(l[0].trim().equals("name"))
                {
                    motif_qname = new DefaultMutableTreeNode(Character.toUpperCase(l[0].trim().charAt(0)) + l[0].trim().substring(1)+": " +l[1].trim());
                    motif_value.add(motif_qname);
                }
                else if(l[0].trim().equals("ori"))
                {
                    motif_ori = new DefaultMutableTreeNode(Character.toUpperCase(l[0].trim().charAt(0)) + l[0].trim().substring(1)+": " +l[1].trim());
                    motif_value.add(motif_ori);
                }
                else if(l[0].trim().equals("style"))
                {
                    motif_style = new DefaultMutableTreeNode(Character.toUpperCase(l[0].trim().charAt(0)) + l[0].trim().substring(1)+": " +l[1].trim());
                    motif_value.add(motif_style);
                }
                else
                {
                    motif_parentname = new DefaultMutableTreeNode(Character.toUpperCase(l[0].trim().charAt(0)) + l[0].trim().substring(1)+": " +l[1].trim());
                    motif_name.add(motif_parentname);
                    qualifiers = new DefaultMutableTreeNode("Qualifiers");
                    motif_name.add(qualifiers);
                }

            }
        }

        motifs_tree = new JTree(root);
        Color color = test.p6.getBackground ();
        motifs_tree.setBackground(color);
        GridBagConstraints gbc1 = new GridBagConstraints ();
        gbc1.insets = new Insets(2, 1, 2, 1);
        gbc1.fill = GridBagConstraints.BOTH;
        gbc1.weightx = 1.0;
        gbc1.weighty = 1.0;
        gbc1.gridwidth  = GridBagConstraints.EAST;
        gbc1.anchor = GridBagConstraints.WEST;
        if(test.pmotif.getWidth() == 0)
        {
            w = 280;
        }
        else
        {
            w = test.pmotif.getWidth()-60;
        }
        MyCellRenderer re = new MyCellRenderer();
        re.setFont(new Font("Helvetica",Font.BOLD,2));
        motifs_tree.setCellRenderer(re);
        motifs_tree.setRowHeight( -1);
        BasicTreeUI basicTreeUI = (BasicTreeUI) motifs_tree.getUI();
        basicTreeUI.setRightChildIndent(15);
        basicTreeUI.setLeftChildIndent(9);

        Rectangle rectangle = motifs_tree.getPathBounds(motifs_tree.getPathForRow(2));


        try
        {
            xOffset = 2*rectangle.x;
        }
        catch(Exception das)
        {

            xOffset = 2*24;
        }

        test.pmotif.setFont(new Font("Helvetica",Font.BOLD,2));
        motifs_tree.setFont(new Font("Helvetica",Font.BOLD,2));

        test.pmotif.add(motifs_tree,gbc1);
        test.pmotif.setVisible(true);
        test.pmotif.revalidate();
        expandTree(motifs_tree, true);

    }

thanks

extends JEditorPane implements TreeCellRenderer

  • please whats goal, reason('s maybe), simple why

  • whats has linked JEditorPane with TreeCellRenderer to do together as JTable Renderer

  • who from them is (may question could be) parent, who is child and grand_parent

  • my answer is simple, short not, don't do that, this way and for this idea, since is possible, but why bothering with that

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