accessing controls in a panel

[rjl444]

I have a frame that has a panel. in the panel is 3 controls. I need to
hide one of the controls when an event fires in the frame. I can hide
the panel easily, but how do I access a single control from the frame
to hide the control?
Thanks for any help,
Joe

 

[Yanick]

I have a frame that has a panel. in the panel is 3 controls. I need to
hide one of the controls when an event fires in the frame. I can hide
the panel easily, but how do I access a single control from the frame
to hide the control?
Thanks for any help,
Joe

you assign a variable to that control, like :

JButton a = new JButton("Button A");

myFrame.getContentPane().add( a );

// ...

a.setVisible( false );

-Yanick

 

[Andrew Thompson]

I have a frame

Please be precise. Is that a Frame, or a JFrame?

.. that has a panel.

..in the panel is 3 controls.

What controls, specifically?

..I need to hide one of the controls when an event fires in the frame.

Why? If the control is not available, a good way to indicate
that is to setEnabled(false).

 

[rjl444]

it is Jframe, the controls are all Jbuttons. I would like to to do
setenable(false), but either enabled or visible, how do I get the
context of the Jbutton inside a panel.
Yanick- the Jbutton is inside a panel.

 

[rjl444]

it is Jframe, the controls are all Jbuttons. I would like to to do
setenable(false), but either enabled or visible, how do I get the
context of the Jbutton inside a panel.
Yanick- the Jbutton is inside a panel.

 

[Andrew Thompson]

it is Jframe,

JFrame? Please be precise.

..the controls are all Jbuttons.
Ditto.

I would like to to do
setenable(false)
Ditto.

, but either enabled or visible, how do I get the context

What 'context'? Are you asking how to get a reference to
the JButton? That would depend on your code[1] (or the code
your IDE wrote). Generally I declare UI controls as class
attributes, which makes it easy.

[1] This brings us to. Give us a compilable example of your
code (with just *2* JButtons) that shows what you are doing..

..of the Jbutton inside a panel.

But one way to remove a known component from a JPanel is..
<http://java.sun.com/j2se/1.5.0/docs/api/java/awt/Container.html#remove(java.awt.Component)>

You would get better value from a different group, for the moment.
<http://www.physci.org/codes/javafaq.jsp#cljh>

HTH

 

[rjl444]

i dont have access to the code right now, but to summerize:
1) I have Jframe class.
2) I have a method in thid class that builds a panel with JCommands.
let's say C1 and C2 they are called. I have them as private, i beleive
(perhaps I need to make thisthem gloabl) for the Jframe. I then add
them to a panel created in the method .
3) I then in the main class, I add this panel to the ContentPane.

I need to know how to reference C1 from a method in another independant
method in the JFrame class.

 

[Andrew Thompson]

i dont have access to the code right now,

That's me out of here, sorry. It is hard enough attempting to provide
technical assistance on a busy group without delving into apps. for
which you do not 'have access to the code'.

My best suggestion is that you compose a polite email to whoever
*has* access to the code, and ask them to provide a public method
specifically for removing/hiding the component of interest.