Solved

catch child compent's key events from container?

Posted on 2002-06-13
4
225 Views
Last Modified: 2010-03-31
Hi,
   I have a JPanel which contain some image JLabels.
How can I add a key listener to JPanel that catch
key events even JLabels
is in focus.

Thanks.
Sean
0
Comment
Question by:xzhang4
[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
  • 2
4 Comments
 
LVL 19

Expert Comment

by:Jim Cakalic
ID: 7076115
According to the javadoc, JLabel cannot get the keyboard focus. Do you have some sample code that doesn't work as you had expected?

Jim
0
 

Author Comment

by:xzhang4
ID: 7076307
OK.  I am wrong.   How about JPanel contain some JButtons.
Thanks.
0
 
LVL 92

Accepted Solution

by:
objects earned 100 total points
ID: 7076781
Try getting the input map as follows:

InputMap map = panel.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);

Add add your input action to this map.
0
 
LVL 92

Expert Comment

by:objects
ID: 7082828
0

Featured Post

What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

Question has a verified solution.

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

An old method to applying the Singleton pattern in your Java code is to check if a static instance, defined in the same class that needs to be instantiated once and only once, is null and then create a new instance; otherwise, the pre-existing insta…
Introduction This article is the second of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article covers the basic installation and configuration of the test automation tools used by…
Viewers learn about the scanner class in this video and are introduced to receiving user input for their programs. Additionally, objects, conditional statements, and loops are used to help reinforce the concepts. Introduce Scanner class: Importing…
Viewers will learn about the different types of variables in Java and how to declare them. Decide the type of variable desired: Put the keyword corresponding to the type of variable in front of the variable name: Use the equal sign to assign a v…
Suggested Courses

626 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