JTreeTable Expansion problems

[Clemens Stich]

Hi,
I tried to customize the JTreeTable from the sun homepage. My tree consists out of DefaultMutableTreeNodes (to be more exactly, an extension of DefaultMutableTreeNodes).
My goal is to get a working TreeTable that has a tree in the first column and according to this tree checkboxes in the second column.
I searched the forum and found this thread: http://www.coderanch.com/t/338967/GUI/java/JTreeTable-tree-DefaultMutableTreeNodes
It helped me a lot and I did the things as mentioned in this thread. My problem is now, that I cannot expand the tree and I don't know why...

The code in my TreeTableModel impl class looks like that:

    
public class MyTreeTableModel extends AbstractTreeTableModel {
 

//Names of the columns.
    static protected String[]  cNames = {"Name", "Activated" };
 
    // Types of the columns.
    static protected Class[]  cTypes = {TreeTableModel.class, Boolean.class};
 

    public int getColumnCount() {
    return cNames.length;
}
 
public String getColumnName(int column) {
return cNames[column];
}


public Class getColumnClass(int column) {
return cTypes[column];
}
 

public boolean isCellEditable(Object node, int column) {
return column == 1;
}

public void setValueAt(Object aValue, Object node, int column) 
{
         //MyTreeNode extends DefaultMutableTreeNode and has a boolean field to indicate a selection  
MyTreeNode treeNode = (MyTreeNode)node;

if (aValue instanceof Boolean && column == 1) {
treeNode.setSelected(((Boolean)aValue).booleanValue());
}
}


public Object getValueAt(Object node, int column) {

MyTreeNode treeNode = (MyTreeNode)node;

if (column == 0) 
{
return treeNode.toString();
}
else if (column == 1) {
return new Boolean(treeNode.isSelected());
}
return null;
}


public boolean isLeaf(Object node) {

MyTreeNode treeNode = (MyTreeNode)node;
if (treeNode != null)
return treeNode.isLeaf();
else
return false; //TODO
}
 
public int getChildCount(Object parent) {
// TODO Auto-generated method stub
MyTreeNode node = (MyTreeNode)parent;
if (node != null)
return node.getChildCount();
else
return 0;
}
 
public Object getChild(Object parent, int index) {
MyTreeNode node = (MyTreeNode)parent;

return node.getChildAt(index);
}


 
public MyTreeTableModel(MyTreeNode rootNode) {
super(rootNode);
}

}

And I create the JTreeTable like this:

...
MyTreeNode rootNode = new MyTreeNode("Root Node");
MyTreeNode n1 = new MyTreeNode("Namespace1");
MyTreeNode n2 = new MyTreeNode("Namespace2");
MyTreeNode myOwnObject = new MyTreeNode(new MyOwnClass());
 
n1.add(myOwnObject);
 
rootNode.add(n1);
rootNode.add(n2);
 
JTreeTable treeTable = new JTreeTable(new MyTreeTableModel(rootNode));
...

For explanation: MyTreeNode's userobject can either be a normal String or an Object of type of MyOwnClass (as you see above). The nodes which represents just a String are always the parent, and the nodes which represents MyOwnClass are always the children (= leafs). I of course overwrote some methods in MyTreeNode. I know that the implementation of MyTreeNode is correct, because I used it before in a normal tree and there it worked.


I am really hoping that someone can help me
Thanks...
[ January 05, 2006: Message edited by: Clemens Stich ]

[A Alex]

Could you figure out the problem with the treetable , Since I am having teh same problem , please let me know if you find any

thanks
A Alex

[Clemens Stich]

No I have no idea how to solve that problem.
Because my tree had a simple binary structure, I decided not to use the TreeTable, but I used a simple table and I just simulated a tree-like view in that table. This isn't the nicest thing to do, but it worked and it was relatively simple

[A Alex]

If you are interested I did find the solution
Just add a mouse listner to the table and dispatch the
mouse events to the tree , I havent seen any issues with this
till now . The code section I used is given below

regards
A Alex

MouseListener ml = new MouseAdapter() {
public void mousePressed(MouseEvent e) {
int selRow = m_table.getTree().getRowForLocation(e.getX(), e.getY());
TreePath selPath = m_table.getTree().getPathForLocation(e.getX(), e.getY());

if(selRow != -1) {
if(e.getClickCount() == 1) {
// System.out.println("one Selrow ="+selRow+" selpath="+selPath);
} else if(e.getClickCount() == 2) {
// System.out.println("two Selrow ="+selRow+" selpath="+selPath);
}
}
MouseEvent newME = new MouseEvent(m_table.getTree(), e.getID(),
e.getWhen(), e.getModifiers(),
e.getX() - m_table.getCellRect(0, 0, true).x,
e.getY(), e.getClickCount(),
e.isPopupTrigger());
m_table.getTree().dispatchEvent(newME);
}
m_table.addMouseListener(ml);