javax.swing.ListCellRenderer — clojure-interop/javax.swing 1.0.5

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<Object> { 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;
}

}

get-list-cell-renderer-component clj

(get-list-cell-renderer-component this
                                  list
                                  value
                                  index
                                  is-selected
                                  cell-has-focus)

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.

list - The JList we're painting. - javax.swing.JList value - The value returned by list.getModel().getElementAt(index). - E index - The cells index. - int is-selected - True if the specified cell was selected. - boolean cell-has-focus - True if the specified cell has the focus. - boolean

returns: A component whose paint() method will render the specified value. - java.awt.Component