Logo Questions Linux Laravel Mysql Ubuntu Git Menu
 

TreeCellRenderer: how to set background color?

Tags:

java

swing

jtree

I've written a custom TreeCellRenderer in order to change a components appearance. Everything works fine, except that setBackground has no effect. The code is definitely executed as the foreground color always changes correctly. Since selected items are rendered in blue and deselected item in white (without having written that code myself), I assume that my changes are overridden by JTree. So what would be the proper way to change the background color?

This is essentially my code:

JTree tree = new JTree(); 
tree.setCellRenderer(new MyCellRenderer()); 

///////

public class MyCellRenderer extends DefaultTreeCellRenderer{

   @Override
   public Component getTreeCellRendererComponent(JTree tree, Object value,
        boolean isSelected, boolean expanded, boolean leaf, int row,
        boolean hasFocus) {

    JComponent c = (JComponent) super.getTreeCellRendererComponent(tree, value, isSelected, expanded, leaf, row, hasFocus);
      DefaultMutableTreeNode node = (DefaultMutableTreeNode) value; 
      MyData data = (MyData)node.getUserObject();   
      if(data.isX()){
          c.setForeground(Color.blue); 
          c.setBackground(Color.gray); 
      }
      return c; 
    }
}
like image 603
Pedro Avatar asked May 11 '13 18:05

Pedro


1 Answers

Try adding a call to c.setOpaque(true).

like image 150
wchargin Avatar answered Sep 28 '22 10:09

wchargin