jtree

I want to use a tree in my Scala swing application, but the component isn't available in the API. Does a wrapper of JTree exists ? If not, do you have any advice for making it ? Thanks Even though you can use directly the Java JTree in your scala program, as illustrated by this thread , there is a debate about including a Scala wrapper of a JTree. The following common usages are tedious, verbose, non-type safe, and/or require unsafe null usage: Creating a custom tree model, backed by your own user objects -- the Scala Swing way would be to have a standard typesafe Map behind it Events - there

Please have a look at the SSCCE. How can I make the non-selected tree nodes' background transparent. At the moment the background of non-selected nodes is white. My cell renderer, however, should paint it non-opaque if it is not selected (and green when selected...what it does). In the end I want non-selected nodes to be just text without background, since the area which is red in the SSCCE has a gradient fill in my application. import java.awt.BorderLayout; import java.awt.Color; import java.awt.Component; import java.awt.Container; import javax.swing.JFrame; import javax.swing.JScrollPane;

I have a data object represented in a TreeModel , and I'd like to show only part of it in my JTree --for the sake of argument, say the leaves and their parents. How can I hide/filter the unnecessary nodes? My eventual implementation: Have two TreeModel s, the underlying one and the filtered one. When a change occurs on the underlying TreeModel , rebuild the filtered TreeModel from scratch. Clone each node that should be visible, and add it to its first visible ancestor in the filtered TreeModel (or the root if none are visible). See teh codez below, if you're curious. This has the unfortunate

I am attempting to modify the standard Swing JTree to intermingle nodes with and without checkboxes. This is an example: When I attempt to check/uncheck one of the checkboxes (the 'User 01' node in this example), the tree loses nodes: I my code is an adaptation of this example: http://forums.sun.com/thread.jspa?threadID=5321084&start=13 . Instead of embedding a JCheckBox in a DefaultMutableTreeNode like this: new DefaultMutableTreeNode(new CheckBoxNode("Accessibility", true)); I thought it made more sense to create a model node that derived from the DefaultMutableTreeNode, which I call

With a JTree, assuming the root node is level 0 and there may be up to 5 levels below the root, how can I easily expand all the level 1 nodes so that all level 1 & 2 branches and leafs are visible but levels 3 and below aren't? garyLynch Thanks for the quick response guys. However I have now found the simple solution I was looking for. For some reason I just couldn't see DefaultMutableTreeNode.getLevel() in the JavaDocs! FYI what I'm doing now is: DefaultMutableTreeNode currentNode = treeTop.getNextNode(); do { if (currentNode.getLevel()==1) myTree.expandPath(new TreePath(currentNode.getPath()

I'm exploring How to do the implementation of the Copy & Paste of JTree . Because, I want Copy from DefaultMutableTreeNode like toString() to paste in another application like Sublime Text. I was viewing the code in order to view how copy & paste is implemented and how is used drag and drop in JTree . My first thougth was, Copy and Paste between DefaultMutableTreeNode of JTree must be tested, later how paste from Clipboard to another application, but my code is not working and Don't know why is failing, and I need to solve. NOTE : Sorry my code is a bit long, because if I put only a snippet