Examples of javax.swing.tree.TreeSelectionModel

javax.swing.tree.TreeSelectionModel
oracle.com/javase/tutorial/uiswing/components/tree.html">How to Use Trees in The Java Tutorial.
The state of the tree selection is characterized by a set of TreePaths, and optionally a set of integers. The mapping from TreePath to integer is done by way of an instance of RowMapper. It is not necessary for a TreeSelectionModel to have a RowMapper to correctly operate, but without a RowMapper getSelectionRows will return null.
A TreeSelectionModel can be configured to allow only one path (SINGLE_TREE_SELECTION) a number of contiguous paths (CONTIGUOUS_TREE_SELECTION) or a number of discontiguous paths (DISCONTIGUOUS_TREE_SELECTION). A RowMapper is used to determine if TreePaths are contiguous. In the absence of a RowMapper CONTIGUOUS_TREE_SELECTION and DISCONTIGUOUS_TREE_SELECTION behave the same, that is they allow any number of paths to be contained in the TreeSelectionModel.
For a selection model of CONTIGUOUS_TREE_SELECTION any time the paths are changed (setSelectionPath, addSelectionPath ...) the TreePaths are again checked to make they are contiguous. A check of the TreePaths can also be forced by invoking resetRowSelection. How a set of discontiguous TreePaths is mapped to a contiguous set is left to implementors of this interface to enforce a particular policy.
Implementations should combine duplicate TreePaths that are added to the selection. For example, the following code
```
 TreePath[] paths = new TreePath[] { treePath, treePath }; treeSelectionModel.setSelectionPaths(paths); 
```
should result in only one path being selected: treePath, and not two copies of treePath.
The lead TreePath is the last path that was added (or set). The lead row is then the row that corresponds to the TreePath as determined from the RowMapper. @author Scott Violet


        tree.setItsNatTreeCellRenderer(new MainTreeRenderer(tree.getItsNatTreeCellRenderer()));


        tree.setItsNatTreeCellEditor(null); // to avoid edition


        TreeSelectionModel selModel = tree.getTreeSelectionModel();
        selModel.setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
        selModel.addTreeSelectionListener(this);


        FeatureTreeBuilder treeBuilder = new FeatureTreeBuilder(this);
        FeatureTreeNode rootNode = treeBuilder.buildFeatureTreeModel();
        treeBuilder.buildSwingTree(rootNode);
    }

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        TreeModel dataModel = comp.getTreeModel();
        dataModel.addTreeModelListener(this); // Added before to call setTreeModel again because it must be called last (the last registered is the first called, the component register a listener to add/remove DOM elements)
        comp.setTreeModel(dataModel);// Resets the internal listeners, the internal TreeModelListener listener is called first
        comp.addTreeExpansionListener(this);


        TreeSelectionModel selModel = comp.getTreeSelectionModel();
        selModel.addTreeSelectionListener(this);
    }

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        FeatureShowcaseDocument featShowDoc = feature.getFeatureShowcaseDocument();
        ItsNatFreeTree tree = featShowDoc.getItsNatFreeTree();


        feature.setOnloadTargetPanel(panel);


        TreeSelectionModel selModel = tree.getTreeSelectionModel();
        selModel.setSelectionPath(path);
    }

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        TreeModel dataModel = comp.getTreeModel();
        dataModel.addTreeModelListener(this); // Added before to call setTreeModel again because it must be called last (the last registered is the first called, the component register a listener to add/remove DOM elements)
        comp.setTreeModel(dataModel);  // resets the internal listeners, the internal TreeModelListener listener is called first
        comp.addTreeExpansionListener(this);


        TreeSelectionModel selModel = comp.getTreeSelectionModel();
        selModel.addTreeSelectionListener(this);
    }

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                addNode(new TreeTableItem("Shonda Rhimes","Creator"),parentNode);
                addNode(new TreeTableItem("USA","Country"),parentNode);
                addNode(new TreeTableItem("English","Language"),parentNode);


        TreeSelectionModel selModel = treeComp.getTreeSelectionModel();
        selModel.setSelectionMode(TreeSelectionModel.CONTIGUOUS_TREE_SELECTION);


        selModel.addSelectionPath(new TreePath(parentNode.getPath())); // Other


        treeComp.addEventListener("click",this);
        dataModel.addTreeModelListener(this);
        selModel.addTreeSelectionListener(this);


        this.removeButton = (ItsNatHTMLInputButton)compMgr.createItsNatComponentById("removeId");
        removeButton.addEventListener("click",this);


        DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode)selModel.getSelectionPath().getLastPathComponent();
        TreeTableItem selectedItem = (TreeTableItem)selectedNode.getUserObject();
        this.itemPrincipalComp = (ItsNatHTMLInputText)compMgr.createItsNatComponentById("itemPrincipalId");
        itemPrincipalComp.setText(selectedItem.getPrincipal());
        this.itemSecondaryComp = (ItsNatHTMLInputText)compMgr.createItsNatComponentById("itemSecondaryId");
        itemSecondaryComp.setText(selectedItem.getSecondary());


        this.posComp = (ItsNatHTMLInputText)compMgr.createItsNatComponentById("posId");
        posComp.setText(Integer.toString(selModel.getMinSelectionRow()));


        this.updateButton = (ItsNatHTMLInputButton)compMgr.createItsNatComponentById("updateId");
        updateButton.addEventListener("click",this);


        this.insertBeforeButton = (ItsNatHTMLInputButton)compMgr.createItsNatComponentById("insertBeforeId");

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        EventTarget currentTarget = evt.getCurrentTarget();
        if (currentTarget == removeButton.getHTMLInputElement())
        {
            DefaultTreeModel dataModel = (DefaultTreeModel)treeComp.getTreeModel();
            TreeSelectionModel selModel = treeComp.getTreeSelectionModel();
            if (!selModel.isSelectionEmpty())
            {
                // Selection Model is in CONTIGUOUS_TREE_SELECTION mode
                TreePath[] paths = selModel.getSelectionPaths();
                for(int i = 0; i < paths.length; i++)
                {
                    MutableTreeNode node = (MutableTreeNode)paths[i].getLastPathComponent();
                    if (node == dataModel.getRoot())
                        dataModel.setRoot(null);

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        log(e.toString());
    }


    public void valueChanged(TreeSelectionEvent e)
    {
        TreeSelectionModel selModel = treeComp.getTreeSelectionModel();


        TreePath[] paths = e.getPaths();
        String fact = "";
        for(int i = 0; i < paths.length; i++)
        {
            TreePath path = paths[i];
            boolean selected = selModel.isPathSelected(path);
            if (selected)
                fact += ", selected ";
            else
                fact += ", deselected ";
            fact += path.getLastPathComponent();
        }


        log(e.getClass().toString() + " " + fact);


        int row = selModel.getMinSelectionRow(); // First selected
        if (row != -1)
        {
            TreePath path = treeComp.getTreePathForRow(row);
            DefaultMutableTreeNode node = (DefaultMutableTreeNode)path.getLastPathComponent();
            TreeTableItem value = (TreeTableItem)node.getUserObject();

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                addNode("Ellen Pompeo",parentNode,dataModel);
                addNode("Sandra Oh",parentNode,dataModel);
                addNode("Justin Chambers",parentNode,dataModel);
                addNode("T.R. Knight",parentNode,dataModel);


        TreeSelectionModel selModel = treeComp.getTreeSelectionModel();
        selModel.setSelectionMode(TreeSelectionModel.CONTIGUOUS_TREE_SELECTION);


        selModel.addSelectionPath(new TreePath(parentNode.getPath())); // Actors


        treeComp.addEventListener("click",this);
        dataModel.addTreeModelListener(this);
        selModel.addTreeSelectionListener(this);


        treeComp.addTreeWillExpandListener(this);


        this.removeButton = (ItsNatHTMLInputButton)compMgr.createItsNatComponentById("removeId");
        removeButton.addEventListener("click",this);


        this.itemComp = (ItsNatHTMLInputText)compMgr.createItsNatComponentById("itemId");
        itemComp.setText(selModel.getSelectionPath().getLastPathComponent().toString());


        this.posComp = (ItsNatHTMLInputText)compMgr.createItsNatComponentById("posId");
        posComp.setText(Integer.toString(selModel.getMinSelectionRow()));


        this.updateButton = (ItsNatHTMLInputButton)compMgr.createItsNatComponentById("updateId");
        updateButton.addEventListener("click",this);


        this.insertBeforeButton = (ItsNatHTMLInputButton)compMgr.createItsNatComponentById("insertBeforeId");

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        EventTarget currentTarget = evt.getCurrentTarget();
        if (currentTarget == removeButton.getHTMLInputElement())
        {
            DefaultTreeModel dataModel = (DefaultTreeModel)treeComp.getTreeModel();
            TreeSelectionModel selModel = treeComp.getTreeSelectionModel();
            if (!selModel.isSelectionEmpty())
            {
                // Selection Model is in CONTIGUOUS_TREE_SELECTION mode
                TreePath[] paths = selModel.getSelectionPaths();
                for(int i = 0; i < paths.length; i++)
                {
                    MutableTreeNode node = (MutableTreeNode)paths[i].getLastPathComponent();
                    if (node == dataModel.getRoot())
                        dataModel.setRoot(null);

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        log(e.toString());
    }


    public void valueChanged(TreeSelectionEvent e)
    {
        TreeSelectionModel selModel = (TreeSelectionModel)e.getSource();


        TreePath[] paths = e.getPaths();
        String fact = "";
        for(int i = 0; i < paths.length; i++)
        {
            TreePath path = paths[i];
            boolean selected = selModel.isPathSelected(path);
            if (selected)
                fact += ", selected ";
            else
                fact += ", deselected ";
            fact += path.getLastPathComponent();
        }


        log(e.getClass().toString() + " " + fact);


        int row = selModel.getMinSelectionRow(); // First selected
        if (row != -1)
        {
            TreePath path = treeComp.getTreePathForRow(row);
            Object value = path.getLastPathComponent();
            itemComp.setText(value.toString());

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