JTree bold all user selected values

[nalaka dhar]

Hi,

i am working on my first swing application and am stuck with the below functionality in JTree.

i have created a Jtree from values taken from the DB. the displayed values are linked with a HashMap, so when the user clicks a value(leaf) from the Jtree, the appropriate object will be selected from the Map and the process works fine.

the functionaly which i need help is;
initially when the user first opens the Application, the Jtree values should be displayed in bold. and after the user selected a value, it should be un-bolded. (the requirment is for the user to identify which values he has selected and which are new ).

i have implemented a custom TreeCellRenderer and was able to make the values bold initially and also unbold the selected value(will be unbold only till it is selected) with the below code. but as mentioned, i need to keep the selected values un-bold until the application is closed.(ex-similar functionality as Microsoft Outlook)

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

     if (expanded ) {
     this.setFont(getFont().deriveFont(Font.BOLD));
    }

    if (selected) {
      this.setFont(getFont().deriveFont(Font.PLAIN + Font.ITALIC));
      
    }

     if (!selected) {
      this.setFont(tree.getFont().deriveFont(Font.BOLD));

    }
     
    super.getTreeCellRendererComponent(tree, value, selected,
            expanded, leaf, row, hasFocus);
    
    return this;
  }

will much appreciate any help on this.

Thanks in advance,
Nalaka

[Paul Clapham]

The object you are displaying will need a boolean attribute where it can keep track of whether it's supposed to appear bold or not. Presumably you would set, or toggle, that attribute in the object when the user selects a node containing it. Your TreeCellRenderer would also have to query that attribute to determine whether to display it as bold or not.