Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

How to change linestyle in JTree

Posted on 2000-02-14
9
Medium Priority
?
780 Views
Last Modified: 2012-05-04
How can I change the linestyle from dotted to solid in the swing component JTree ?
0
Comment
Question by:eeks2
[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
  • 6
  • 3
9 Comments
 
LVL 7

Expert Comment

by:vladi21
ID: 2526496
http://java.sun.com/docs/books/tutorial/uiswing/components/tree.html
By default, the Java Look & Feel draws no lines between nodes. By setting the JTree.lineStyle client property of a tree, you can specify a different convention. For example, to request that the Java Look & Feel use horizontal lines to group nodes (as shown in the next figure), use the following code:

tree.putClientProperty("JTree.lineStyle", "Horizontal");


To specify that the Java Look & Feel should draw lines detailing the relationships between nodes (as shown in the next figure), use this code:
tree.putClientProperty("JTree.lineStyle", "Angled");

---
also look at Swing sources and examples

0
 
LVL 7

Expert Comment

by:vladi21
ID: 2526516
0
Build and deliver software with DevOps

A digital transformation requires faster time to market, shorter software development lifecycles, and the ability to adapt rapidly to changing customer demands. DevOps provides the solution.

 

Author Comment

by:eeks2
ID: 2526597
I know the examples, and I tried it, but on my machine this code has no effect. Lines are always dotted. Even if the code would work, I have only the choice between "None","Horizontal" and "Angled" but this is not what I want, because I want "solid angled" lines.
0
 
LVL 7

Expert Comment

by:vladi21
ID: 2526922
Answer : you have only 3 choices,
but You can implement custom UI, i.e. you can extends javax\swing\plaf\metal\MetalTreeUI.java
0
 

Author Comment

by:eeks2
ID: 2530130
When I exchange JTree with MetalTreeUI then I get a lot of errormessages, so I have to reconfigure my whole program. I dont know the difference between JTree and MetalTreeUI, but they seem to use different methods.
0
 
LVL 7

Expert Comment

by:vladi21
ID: 2530898
post ur code
0
 
LVL 7

Accepted Solution

by:
vladi21 earned 600 total points
ID: 2530937
U must do something like this:

create class

class MyTreeUI extends MetalTreeUI {//or  BasicTreeU

ovveride 2 methods of BasicTreeU - look at sources

protected void paintVerticalPartOfLeg()
protected void paintHorizontalPartOfLeg()

}


JTree myTree=new JTree();

myTree.setUI(new MyTreeUI());
0
 

Author Comment

by:eeks2
ID: 2541676
Ok, this basically works. Interestingly I get only the paintHorizontalPartOfLeg event. I filled in following lines.
g.drawLine((int)bounds.getX()-12,(int)bounds.getY(),(int)bounds.getX()-12,(int)bounds.getY()+(int)bounds.getHeight()/2); //vertical part
g.drawLine((int)bounds.getX()-12,(int)bounds.getY()+bounds.getHeight()/2,(int)bounds.getX()-4,(int)bounds.getY()+(int)bounds.getHeight()/2); //horizontal part
Using this code I get solid lines.
Thank You Vladi for suggesting me hints to solve this question.
0

Featured Post

The top UI technologies you need to be aware of

An important part of the job as a front-end developer is to stay up to date and in contact with new tools, trends and workflows. That’s why you cannot miss this upcoming webinar to explore the latest trends in UI technologies!

Question has a verified solution.

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

Java contains several comparison operators (e.g., <, <=, >, >=, ==, !=) that allow you to compare primitive values. However, these operators cannot be used to compare the contents of objects. Interface Comparable is used to allow objects of a cl…
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 will learn one way to get user input in Java. Introduce the Scanner object: Declare the variable that stores the user input: An example prompting the user for input: Methods you need to invoke in order to properly get  user input:
This tutorial will introduce the viewer to VisualVM for the Java platform application. This video explains an example program and covers the Overview, Monitor, and Heap Dump tabs.
Suggested Courses

715 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