Changing nodes in a JTree

What "event" method should I call after changing attributes of the userObjects associated with TreeNodes throughout a tree?
nodesChanged() requires a root node and a set of indices that are direct children of that node. Should I simply call this several times in a row with different root nodes and children as necessary? Or is there a better way to do it?
Thanks,
Laird

What you expect to be a better way?
Denis Krukovsky
http://dotuseful.sourceforge.net/

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Dynamically changing the color of nodes in a JTree

I have created a JTree and want to dynamically change the color of some of the TreeNodes as my program runs. The JTree is displayed in a JPanel. There is an algorithm built into which identifies the nodes whose color I need to change. No user actions is performed (everythign is internal to the program).
It seems that in the TreeCellRender only kicks in when the tree is first displayed. How do I get it to re-render the tree when the TreeModel changes? It seems that the Listeners are only looking for external user interactions.
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I think I was a bit too vague in my question. Let me try again...
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Change font size of JTree nodes dynamically

hi,
I have a requirement to change the font size of nodes in a JTree as and when the user wants.
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How can I change the font size of JTree at runtime??
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I haven't done this, but it seems like
public Component getTreeCellRendererComponent(...Object value,...) {
Component c = super.getTreeCellRendererComponent(...);
if (value!=null &&
value instanceof(String) &&
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c.setFont(bigFont);
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}It seems that this code is just making the font size of nodes begining with "A" bigger and the rest smaller.
It doesn't solve my problem.
I want to have something like a font chooser by which user can choose the font size they want for the JTree.
any help ??

How do I get a dotted line to connect nodes in a JTree?

I am trying to recreate a Windows Explorer application, does anyone know how they get the dotted lines to connect the nodes in the JTree????

JTree uses a specific line style to represent the edges between nodes. The default is no edges, but we can set JTree�s lineStyle client property so that each parent node appears connected to each of its child nodes by an angled line:
myJTree.putClientProperty("JTree.lineStyle", "Angled");
We can also set this property such that each tree cell is separated by a horizontal line:
myJTree.putClientProperty("JTree.lineStyle", "Horizontal");
To disable the line style:
myJTree.putClientProperty("JTree.lineStyle", "None");
As with any Swing component, we can also change the UI resource defaults used for all instances of the JTree class. For instance, to change the color of the lines used for rendering the edges between nodes as described above, we can modify the entry in the UI defaults table for this resource as follows:
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Selectively editing nodes in a JTree

I need to make certain nodes in a JTree editable, without making every node in the tree editable. How can I accomplish this?

Is there some kind of method in a JTree or a DefaultMutableTreeNode that I can call to select the node's text and be able to change it?Hmm. And you did read the API for JTree looking for such methods before you posted here, didn't you?
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Hi,
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Thanks

You say to get the mouseevent coordinates with a mouse
listener, but which component should be the caller of
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If I choose the jtree, I can't get the 'mouseevent
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because the methods mouseEntered and mouseExited are
invoked just once (when the mouse enter inside the
jtree's area (mouseEntered), and when the mouse gets
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How to allow multiple selection of nodes in a JTree ?
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By default when you create new instance og JTree the selection model is multiple selection. And if you want to change it you use next:
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or
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or
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Hi,
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Mary

you could use the following method that expands nodes recursively
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Hi,
I am trying to get total number of nodes in a JTree, and cannot find a way to do it.
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How many nodes does this tree have?
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import javax.swing.*;
import javax.swing.event.TreeModelListener;
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}But for bounded tree model using DefaultMutableTreeNode look at bread/depth/preorder enumeration methods to walk the entire tree. Or look at the source code for those and adapt them to work with the TreeModel interface.

How to get the Change node in Production Server!!!!!

Hi Guys,
Kindly let me know how to get the Change node in Production Server for the Transaction Code Pe03 for generating the Acknowledgement No for the year 2008 .
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If you want to generate the e-file feature 40ACK, do it in our Customization client box (Golden box) & save the request & move to Quality & production.
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Hello,
Each node contains two JTextAreas in a Box layout and a few JButtons.
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was able to fix it over here:
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How can I get a count of ALL nodes in a JTree?

Not sure if I am missing something here or what. Is there an easy way to determine the total number of nodes in a JTree? I thought there would be a method to return this, but I'm not seeing it in JTree or DefaultTreeModel. Do I have to start at the root and recursively get child counts? Yuck!
Jamie

You are absolutely right! Create a recursive method and count all your children from the root.
Denis Krukovsky
http://dotuseful.sourceforge.net/

Getting TreePath for all nodes in a JTree

Hi everybody
I want to get TreePath for all the nodes in a JTree
Can anybody help me?

Hi,
i tried to used your code.
there is a problem, it is not taking the entire paths.
so if you have some children,it takes the paths only for the fathers.
so i correct it to the following way(it will take the entire paths):
public void getPathForAllNodes(TreePath path)
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Changing nodes in a JTree

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