CODEWITHSUNDEEP
javaswingjtreeword-wrap
user3838784
user3838784

Reputation:

Word Wrapping with JTree

I was wondering if there was any way to use word wrapping with JTrees. I am using HTML in the node's text, I'm not sure if that's important or not.

screenshot

Upvotes: 3

Views: 840

Answers (1)

Beniton Fernando
Beniton Fernando

Reputation: 1533

Ok you can try like below.

        JTree tree = new JTree();
        DefaultMutableTreeNode root = new DefaultMutableTreeNode("Animals");
        DefaultTreeModel model = new DefaultTreeModel(root);
        tree.setModel(model);
        root.add(new DefaultMutableTreeNode(new Animal("Dog","ACS")));
        root.add(new DefaultMutableTreeNode(new Animal("Cat","BCS")));
        root.add(new DefaultMutableTreeNode(new Animal("Lion","FCS")));
        root.add(new DefaultMutableTreeNode(new Animal("Tiger","<html>Hello World!<br>blahblahblah</html>")));

        DefaultTreeSelectionModel sModel = new DefaultTreeSelectionModel(); 
        sModel.setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
        tree.setSelectionModel(sModel);
        tree.addTreeSelectionListener(new TreeSelectionListener() {

            @Override
            public void valueChanged(TreeSelectionEvent selection) {
                DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode)selection.getPath().getLastPathComponent();
                if(selectedNode.isLeaf()){
                    Animal animal = (Animal)selectedNode.getUserObject();
                }
            }
        });
        tree.setCellRenderer( new DefaultTreeCellRenderer(){

            @Override
            public Component getTreeCellRendererComponent(JTree tree, Object value, boolean sel, boolean expanded,
                    boolean leaf, int row, boolean hasFocus) {
                if(value != null ){
                    DefaultMutableTreeNode node =  (DefaultMutableTreeNode)value;
                    if(node.isLeaf()){
                        Animal animal = (Animal)((DefaultMutableTreeNode)value).getUserObject();

                        this.setText(animal.name);
                    }else {
                        return super.getTreeCellRendererComponent(tree, value, sel, expanded, leaf, row, hasFocus);
                    }
                } 
                return this;
            }

        });

This gives me below output.

enter image description here

Hope it help you.

For auto wrap the content you can use html

Please refer to Andrew's answer in this link

Upvotes: 3

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