jtree | 易学教程

How to disable expand sign in Swing JTree?

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问题 I'm working in Swing and I would like to disable the expand (plus [+]) sign on a certain type of nodes. Not sure how to do it because my nodes aren't leaves and I also cannot use setShowsRootHandles (which is only for the root). I'm referring to to JTree: suppose i got this structure: Root --[+] node1 --[+] node2 when I load this structure i would like not to see the [+] sign on node2 (because it a special type node). But I also would like to expand it by using a special command. I've

How do I add a different JComboBox to each JTree node?

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问题 I have a JTree that I'm filling with skills for a Game Database programme that I'm writing. There are several categories, and subcategories (actual skills), and then levels skill below that (sometimes). Currently I'm emulating this with one skill class, some options inside, and a few enums, plus a method to check that if the skill is a category (called isCategory). Two other things to note: Different types of skill behave differently. Some are bought once, other several times, some have

List files and directories with Jtree and File in Java

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问题 I want to create a very very simple file manager with JTree, but I only saw a very hard code and I want to create this script very clean and simple. Can you help me? How do I List the directories of my computer in JTree? 回答1: I wrote the simplest example of a file browser I could think of. It lists all of the directories and files on the C: drive on a Windows computer. Here's the result. And here's the code. I put everything together in one class to make it easier to paste here. You should

Tree in scala swing

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问题 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 回答1: 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

Best way to implement tooltips for JTree?

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问题 since JTree & TreeModel don't provide tooltips straight out-of-the-box, what do you think, what would be the best way to have item-specific tooltips for JTree? Edit: (Answering my own question afterwards.) @Zarkonnen: Thanks for the getTooltipText idea. I found out another (maybe still a bit nicer) way with overriding DefaultTreeCellRenderer and thought to share it: public class JTreeWithToolTips { private static class OwnRenderer extends DefaultTreeCellRenderer { @Override public Component

Expanding specific JTree path

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问题 I have a problem with expanding JTree nodes. I start when use selects a node everything but the path to the selected node and the selected node itself to be collapsed. I've tried using tree.collapsePath(new TreePath(tree.getModel().getRoot())); tree.expandPath(new TreePath(e111.getPath())); something like this but it seems to have no effect and I really have no idea how can I do this Here's how my tree looks: http://img220.imageshack.us/img220/3450/jtreepng.png If I click 1.1.1 I want

Dynamically populating the tree model from a text file in JTree

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The problem I am facing is with the tree model of the JTree. I have defined the root node as: javax.swing.tree.DefaultMutableTreeNode rootNode = new javax.swing.tree.DefaultMutableTreeNode(projectName); When the application first starts, I want the treeModel to be created and loaded. For this, I am using a file meta.txt, which has information like the following: 1QuotesPrice.Job 2QuotesPrice.Df 1Quotes.Job 2Quotes.Wf 3Quotes.Df 2Falkeblang.Wf 3Falkeblang.Df The first column is the level, and the second is the node of the tree. Now based on this information, I want to create the tree model, but

Dynamically populating the tree model from a text file in JTree

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问题 The problem I am facing is with the tree model of the JTree. I have defined the root node as: javax.swing.tree.DefaultMutableTreeNode rootNode = new javax.swing.tree.DefaultMutableTreeNode(projectName); When the application first starts, I want the treeModel to be created and loaded. For this, I am using a file meta.txt, which has information like the following: 1QuotesPrice.Job 2QuotesPrice.Df 1Quotes.Job 2Quotes.Wf 3Quotes.Df 2Falkeblang.Wf 3Falkeblang.Df The first column is the level, and

Simple dynamic JTree-based S3 bucket/object chooser example

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问题 Before writing my own custom implementation, I have been googling for a complete example of a simple tree-like JTree/JDialog that allows me to dynamically load and expand the contents of a S3 bucket or sub-S3-object-keys. In other words, I don't want to recursively prefetch all the objects from different buckets beforehand and populate a JTree . The reason is that there are too many (sub-)objects and keys to have a smooth UX experience, in the order of millions/billions of objects spread in

Jtree not shown on adding a node!

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问题 I have a static jtree in a scrollpane. And now iam trying to add child to jtree, it got added successfully. Now, the added node is not visible in the jtree. Try 1: I have tried with model.reload() DefaultTreeModel model = (DefaultTreeModel) (tree.getModel()); TreePath Path = findByName(tree, new String[]{Globals.CONS_UIAPROJECTS}); DefaultMutableTreeNode pnode = (DefaultMutableTreeNode) Path.getLastPathComponent(); model.insertNodeInto(UIAProjectExploreDisplay.nodeProTree, pnode, pnode