Question: Why is it that DefaultMutableTreeNode contains an Object, and
the value parm DefaultTreeCellRenderer.getTreeCellRendererComponent is an
Object,
but somewhere, somehow, any object you send gets forcably changed into a String?
For instance, if I send this to the attached code:
addItem(new JButton("Hello World"),null);
The (Component) cast fails, and the tree gets a JLabel that says stuff
like:
"....flag=1134,maximumSize=,minimumSize=,preferredSize=,deafultIcon=,disabledIcon=,disabledSelectedIcon=,
..." (you get the picture)
I have considered just keeping an ArrayList of everything, and then just
sending an index across the JTree mechanism.
Since this is a silly and stupid thing to have to do, I was wondering if anybody
knows how to disable the ridiculous(IMHO)
toString that's happening somewhere.
P.S. Here's the sample code...
class ComponentTreeCellRenderer extends DefaultTreeCellRenderer {
public Component getTreeCellRendererComponent(JTree aTree,Object
aValue,boolean aSelected,boolean aExpanded,boolean aLeaf,int aRow,boolean
aHasFocus) {
Component retval;
try {
retval=(Component)aValue;
} catch(ClassCastException exception) {
retval=new JLabel(aValue);
}
return retval;
}
};
DefaultMutableTreeNode addItem(Object aItem,DefaultMutableTreeNode aNode) {
DefaultTreeModel model=(DefaultTreeModel)tree.getModel();
DefaultMutableTreeNode newNode=new DefaultMutableTreeNode(aItem);
DefaultMutableTreeNode current=aNode;
if(current==null) {
current=(DefaultMutableTreeNode)model.getRoot();
}
model.insertNodeInto(newNode,current,0);
return newNode;
}
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