javax.swing
Interface ListCellRenderer
- public interface ListCellRenderer
Identifies components that can be used as "rubber stamps" to paint
the cells in a JList. For example, to use a JLabel as a
ListCellRenderer, you would write something like this:
class MyCellRenderer extends JLabel implements ListCellRenderer {
public MyCellRenderer() {
setOpaque(true);
}
public Component getListCellRendererComponent(
JList list,
Object value,
int index,
boolean isSelected,
boolean cellHasFocus)
{
setText(value.toString());
setBackground(isSelected ? Color.red : Color.white);
setForeground(isSelected ? Color.white : Color.black);
return this;
}
}
- See Also:
JList
,
DefaultListCellRenderer
Method Summary |
java.awt.Component |
getListCellRendererComponent(JList list,
java.lang.Object value,
int index,
boolean isSelected,
boolean cellHasFocus)
Return a component that has been configured to display the specified
value. |
getListCellRendererComponent
public java.awt.Component getListCellRendererComponent(JList list,
java.lang.Object value,
int index,
boolean isSelected,
boolean cellHasFocus)
- Return a component that has been configured to display the specified
value. That component's
paint
method is then called to
"render" the cell. If it is necessary to compute the dimensions
of a list because the list cells do not have a fixed size, this method
is called to generate a component on which getPreferredSize
can be invoked.
- Parameters:
list
- The JList we're painting.value
- The value returned by list.getModel().getElementAt(index).index
- The cells index.isSelected
- True if the specified cell was selected.cellHasFocus
- True if the specified cell has the focus.
- Returns:
- A component whose paint() method will render the specified value.
- See Also:
JList
,
ListSelectionModel
,
ListModel
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