Solved

how do I set tooltip text of a treenode?

Posted on 2001-08-02
12
504 Views
Last Modified: 2012-08-14
Hello,

Does anyone know how to set the tooltip text on the node of a JTree? Initially I'd like the node's tooltip text to display "Hello" when I hover the mouse over that node.



I have this code (but it's not working :(

public java.awt.Component getTreeCellRendererComponent(javax.swing.JTree tree, Object value, boolean selected, boolean expanded, boolean leaf, int row, boolean hasFocus) {
     System.out.println("inside tree cell renderer");
     javax.swing.JComponent c = (javax.swing.JComponent)super.getTreeCellRendererComponent(tree, value, selected, expanded, leaf, row, hasFocus);
     
      c.setToolTipText("hhhhhh");
     return c;
}
0
Comment
Question by:TimB
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 4
  • 4
12 Comments
 
LVL 92

Expert Comment

by:objects
ID: 6344040
I don't think tool tips are supported for tree cells.
The renderer is only used to 'rubberstamp' the cells so it won't work.
0
 
LVL 1

Author Comment

by:TimB
ID: 6344121
Bugger!

I'll leave the question open for a bit though - just in case someone can come up with something.

Thanks,


Tim
0
 
LVL 16

Expert Comment

by:Valeri
ID: 6344340
Try it :

public java.awt.Component getTreeCellRendererComponent(javax.swing.JTree tree, Object value, boolean
selected, boolean expanded, boolean leaf, int row, boolean hasFocus) {
        javax.swing.JLabel c = (javax.swing.JLabel)super.getTreeCellRendererComponent(tree, value,
selected, expanded, leaf, row, hasFocus);
   
    c.setToolTipText("hhhhhh");
    return c;
}


You must add this line as well :

ToolTipManager.sharedInstance().registerComponent(yourJTree);

Best Regards,
Valeri
0
Instantly Create Instructional Tutorials

Contextual Guidance at the moment of need helps your employees adopt to new software or processes instantly. Boost knowledge retention and employee engagement step-by-step with one easy solution.

 
LVL 1

Author Comment

by:TimB
ID: 6344851
Hi Valeri,

That didn't seem to work either.  I've tried sticking some system.out's in the code so I can see when the rellrenderer get's called.  I'm not missing something silly like a mouse listener for when I hover over ther treenode am I?

Thanks for the reply anyhow,

TimB
0
 
LVL 16

Accepted Solution

by:
Valeri earned 100 total points
ID: 6344928
The proposed code works !!! I'm sure, because I have JTree with ToolTips in my project. There is something wrong in your code, check it again...

Do you have it :
yourJTree.setCellRenderer(new YourRenderer());

Best Regards,
Valeri
0
 
LVL 1

Author Comment

by:TimB
ID: 6345082
Fantastic!

It works! I'd missed out the - ToolTipManager.sharedInstance().registerComponent(yourJTree); - part that you suggested.

Thanks for the help!

TimB
0
 
LVL 1

Author Comment

by:TimB
ID: 6345084
Thanks,

TimB
0
 
LVL 92

Expert Comment

by:objects
ID: 6347885
Cool, I've learnt something today :-)

Does that mean that getTreeCellRendererComponent is called every time the mouse moves over the tree cell?
0
 
LVL 16

Expert Comment

by:Valeri
ID: 6348042
Yes, but only if you have registered your JTree in ToolTipManager...

Best Regards,
Valeri
0
 
LVL 92

Expert Comment

by:objects
ID: 6348052
Thanks Valeri :)
0
 
LVL 16

Expert Comment

by:Valeri
ID: 6348075
Hi Objects :-)
I've learned many things reading your answers here...

Thanks !!!
0
 
LVL 92

Expert Comment

by:objects
ID: 6348082
(-:
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

INTRODUCTION Working with files is a moderately common task in Java.  For most projects hard coding the file names, using parameters in configuration files, or using command-line arguments is sufficient.   However, when your application has vi…
Go is an acronym of golang, is a programming language developed Google in 2007. Go is a new language that is mostly in the C family, with significant input from Pascal/Modula/Oberon family. Hence Go arisen as low-level language with fast compilation…
Viewers learn about the third conditional statement “else if” and use it in an example program. Then additional information about conditional statements is provided, covering the topic thoroughly. Viewers learn about the third conditional statement …
Viewers will learn about basic arrays, how to declare them, and how to use them. Introduction and definition: Declare an array and cover the syntax of declaring them: Initialize every index in the created array: Example/Features of a basic arr…

696 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question