Hi Folks,

I have JPanel component with bunch of JLabels, JButtons, JTextField etc 
in it.

I was wondering if there is any way I could disable(and enable also) all 
the components in my JPanel instead of picking every component 
individually and doing setEnabled(false) on it ?

Best regards,
VK

In article <d0iiti$dhq$1@news1nwk.SFbay.Sun.COM>,
 Vk <trulytrojan@netscape.net> wrote:

> Hi Folks,
> 
> I have JPanel component with bunch of JLabels, JButtons, JTextField etc 
> in it.
> 
> I was wondering if there is any way I could disable(and enable also) all 
> the components in my JPanel instead of picking every component 
> individually and doing setEnabled(false) on it ?
> 
> Best regards,
> VK

If you refer to the API docs for JComponent's setEnabled method, it 
specifically states that disabling a component does not disable its 
children.  So I would suggest that your best best is to use a custom 
JPanel class, even if only to override the setEnabled method so that you 
enable and disable child components as you wish.

= Steve =
-- 
Steve W. Jackson
Montgomery, Alabama

Steve W. Jackson wrote:
> In article <d0iiti$dhq$1@news1nwk.SFbay.Sun.COM>,
>  Vk <trulytrojan@netscape.net> wrote:
> 
> 
>>Hi Folks,
>>
>>I have JPanel component with bunch of JLabels, JButtons, JTextField etc 
>>in it.
>>
>>I was wondering if there is any way I could disable(and enable also) all 
>>the components in my JPanel instead of picking every component 
>>individually and doing setEnabled(false) on it ?
>>
>>Best regards,
>>VK
> 
> 
> If you refer to the API docs for JComponent's setEnabled method, it 
> specifically states that disabling a component does not disable its 
> children.  So I would suggest that your best best is to use a custom 
> JPanel class, even if only to override the setEnabled method so that you 
> enable and disable child components as you wish.
> 
> = Steve =

Right.

Override setEnabled() to resurce into all children and child containers 
calling setEnabled() on each one.

Rogan
-- 
Rogan Dawes

*ALL* messages to discard@dawes.za.net will be dropped, and added
to my blacklist. Please respond to "nntp AT dawes DOT za DOT net"

first crate an array of type Component type for example

 final Component compo[]=  new Component[] {
        
        jTextField1, jCheckBox1 }.

then

 for (int i = 0; i < components.length; i++)
{
  if(compo[i] instanceof JCheckBox)
 (JCheckBox)(  compo[i])).setEnabled(false);
  else if ( compo[i] instanceof JTextField)
 (JTextField)(  compo[i])).setEnabled(false);
}

This is one alternative there may be other efficient alternative

for example find if there is a way for getting all the components of a
panel in an array of strings and using the same for loop as above check 
the type of components using "instance of" and apply setEnabled(false);

I hope there must be a way to get the list of all the components of a
container

praveen

-- 
Message posted via http://www.javakb.com

Praveen homkar via JavaKB.com wrote:
> first crate an array of type Component type for example
> 
>  final Component compo[]=  new Component[] {
>         
>         jTextField1, jCheckBox1 }.
> 
> then
> 
>  for (int i = 0; i < components.length; i++)
> {
>   if(compo[i] instanceof JCheckBox)
>  (JCheckBox)(  compo[i])).setEnabled(false);
>   else if ( compo[i] instanceof JTextField)
>  (JTextField)(  compo[i])).setEnabled(false);
> }
> 
> This is one alternative there may be other efficient alternative
> 
> for example find if there is a way for getting all the components of a
> panel in an array of strings and using the same for loop as above check 
> the type of components using "instance of" and apply setEnabled(false);
> 
> I hope there must be a way to get the list of all the components of a
> container
> 
> praveen
> 

Too complicated ;-)

overriding setEnabled in JPanel:

public void setEnabled(boolean enabled) {
     super.setEnabled(enabled);
     setChildrenEnabled(this, enabled);
}

private void setChildrenEnabled(Container container, boolean enabled) {
     for (int i=0; i<container.getComponentCount(); i++) {
         Component comp = container.getComponent(i);
         comp.setEnabled(enabled);
         if (comp instanceof Container)
             setChildrenEnabled((Container) comp, enabled);
     }
}

Rogan
-- 
Rogan Dawes

*ALL* messages to discard@dawes.za.net will be dropped, and added
to my blacklist. Please respond to "nntp AT dawes DOT za DOT net"