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Disabled JCheckBox in JList

Posted on 2002-07-04
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Last Modified: 2012-06-27
Hi, I am using a JList that contain JCheckBox, i use the follow ListRender to add the checkbox into JList. In my code, sometimes i need to disabled the JList, but the problem is the JList has been disabled but the JCheckBox still can be checked.

//list renderer
class CheckListRenderer extends JCheckBox implements ListCellRenderer {
   
          public CheckListRenderer() {
               setBackground(UIManager.getColor("List.textBackground"));
               setForeground(UIManager.getColor("List.textForeground"));
          }

          public Component getListCellRendererComponent(JList list, Object value,
               int index, boolean isSelected, boolean hasFocus) {
               setEnabled(list.isEnabled());
               setSelected(((CheckableItem)value).isSelected());
               setFont(list.getFont());
               setText(value.toString());
               return this;
          }
     }
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Question by:chencc77
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7 Comments
 
LVL 92

Accepted Solution

by:
objects earned 120 total points
ID: 7129466
Your renderer just handles painting the list.
You must have some code elsewhere that toggles the CheckableItem value, it is that code that you need to disable.
0
 

Author Comment

by:chencc77
ID: 7129490
Hi objects, this is the CheckableItem class, what should i edit. thanks.

class CheckableItem {
          private String  str;
          private boolean isSelected;
   
          public CheckableItem(String str) {
               this.str = str;
               isSelected = false;
          }
   
          public void setSelected(boolean b) {
               isSelected = b;
          }
   
          public boolean isSelected() {
               return isSelected;
          }
   
          public String toString() {
               return str;
          }
     }
0
 
LVL 92

Expert Comment

by:objects
ID: 7130761
You should not call setSelected if the list is disabled.
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Author Comment

by:chencc77
ID: 7130854
hi, i am not clear with ur comment that how to not call setSelected.
0
 
LVL 92

Expert Comment

by:objects
ID: 7130926
Somewhere in your code you must call setSelected as a result of a checkbox being selected in the list.
If the list is disabled then you should not be doing this.
0
 
LVL 35

Expert Comment

by:girionis
ID: 8893996
No comment has been added lately, so it's time to clean up this TA.

I will leave a recommendation in the Cleanup topic area that this question is:

- points to objects

Please leave any comments here within the
next seven days.

PLEASE DO NOT ACCEPT THIS COMMENT AS AN ANSWER !

girionis
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