This documentation differs from the official API.
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Additionally it
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along with other minor differences.
Please send any questions or feedback to
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javax.swing
interface ListCellRenderer
- All Known Implementing Classes:
- BasicComboBoxRenderer, BasicComboBoxRenderer.UIResource, DefaultListCellRenderer, DefaultListCellRenderer.UIResource, MetalFileChooserUI.FileRenderer, MetalFileChooserUI.FilterComboBoxRenderer
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());
Color background;
Color foreground;
// check if this cell represents the current DnD drop location
JList.DropLocation dropLocation = list.getDropLocation();
if (dropLocation != null
&& !dropLocation.isInsert()
&& dropLocation.getIndex() == index) {
background = Color.BLUE;
foreground = Color.WHITE;
// check if this cell is selected
} else if (isSelected) {
background = Color.RED;
foreground = Color.WHITE;
// unselected, and not the DnD drop location
} else {
background = Color.WHITE;
foreground = Color.BLACK;
};
setBackground(background);
setForeground(foreground);
return this;
}
}
Method Summary |
Component |
Return a component that has been configured to display the specified
value.
|
getListCellRendererComponent
public Component getListCellRendererComponent(JList list,
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.
This documentation differs from the official API.
Jadeite adds
extra features to the API including:
variable font sizes,
constructions examples,
placeholders for classes and methods, and auto-generated “See Also” links.
Additionally it
is missing some items found in standard Javadoc documentation, including:
generics type information,
“Deprecated” tags and comments,
“See Also” links,
along with other minor differences.
Please send any questions or feedback to
bam@cs.cmu.edu.
This page displays the
Jadeite version of the documention, which is derived from the offical documentation that contains this copyright notice:
The official Sun™ documentation can be found here at
http://java.sun.com/javase/6/docs/api/.