JTree rendering problem

[kmm1977]

Hallo
+
my aim to set different fonts on different nodes of a tree , and therefore i need a renderer for each node. I wrote the following renderer. now i am not sure where exactly or how i should call this renderer ?

I wrote a renderer t

public class TreeCellBoldRenderer extends DefaultTreeCellRenderer {

/**
*
*/
private static final long serialVersionUID = 1L;

public Component getTreeCellRendererComponent(JTree tree, Object obj,
boolean selected, boolean expanded, boolean leaf, int row, boolean hasFocus) {

Font f = this.getFont();
f.deriveFont(Font.BOLD);
this.setFont(f);
//setText("Node Name");

return this;
}
}

Regards

[PhHein]

You set it to your JTree:
JTree (Java Platform SE 6)

[kmm1977]

I did that and it paints all the nodes with the font ?
But i wanted only specific nodes i.e ( refer code below )
i want only the red nodes bold

public Component getTreeCellRendererComponent(
						JTree tree,
						Object value,
						boolean sel,
						boolean expanded,
						boolean leaf,
						int row,
						boolean hasFocus) {
							
		super.getTreeCellRendererComponent(
						tree, value, sel,
						expanded, leaf, row,
						hasFocus);
		
		if (leaf) {			
			
			paintNodes(myNode);
		}	
		
		return this;
	}

	private void paintNodes( MyTreeNode node)
	{
		if(nodeNotFound(node)){
			setForeground(Color.RED); 
	 		navigator.navigatorTree.setCellRenderer(new TreeCellBoldRenderer());
	
		}else{				
			setForeground(new Color(1,125,3)); 
		}		
		navigator.navigatorTree.repaint();
	}

[DarrylBurke]

Don't set a cell renderer in a get...RendererComponent. Set the font and foreground instead.

To get better help sooner, post a SSCCE : Java Glossary .

db

[kmm1977]

ok i managed to make runnable code

what i want is to distinguish each node with different fonts or atleast make some of them BOLD

how should i extend this code ?

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Font;
 
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.tree.DefaultTreeCellRenderer;



public class TreeNode {
	
  public static void main(String args[]) {
    JFrame frame = new JFrame("Changed Renderer");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JTree tree = new JTree();
    DefaultTreeCellRenderer renderer = (DefaultTreeCellRenderer) tree.getCellRenderer();
    
    int rowHeight = tree.getRowHeight();
    if (rowHeight <= 0) {
      tree.setRowHeight(rowHeight - 1);
    }
 
    JScrollPane scrollPane = new JScrollPane(tree);
    frame.add(scrollPane, BorderLayout.CENTER);
    frame.setSize(300, 150);
    frame.setVisible(true);
  }
}

[PhHein]

Read this tutorial: How to Use Trees (The Java™ Tutorials > Creating a GUI With JFC/Swing > Using Swing Components)