JXTreeTable.java 文件源码

/**
 * updateUI is overridden to set the colors of the Tree's renderer
 * to match that of the table.
 */
@Override
public void updateUI() {
    super.updateUI();
    // Make the tree's cell renderer use the table's cell selection
    // colors.
    // TODO JW: need to revisit...
    // a) the "real" of a JXTree is always wrapped into a DelegatingRenderer
    //  consequently the if-block never executes
    // b) even if it does it probably (?) should not 
    // unconditionally overwrite custom selection colors. 
    // Check for UIResources instead. 
    TreeCellRenderer tcr = getCellRenderer();
    if (tcr instanceof DefaultTreeCellRenderer) {
        DefaultTreeCellRenderer dtcr = ((DefaultTreeCellRenderer) tcr);
        // For 1.1 uncomment this, 1.2 has a bug that will cause an
        // exception to be thrown if the border selection color is null.
        dtcr.setBorderSelectionColor(null);
        dtcr.setTextSelectionColor(
            UIManager.getColor("Table.selectionForeground"));
        dtcr.setBackgroundSelectionColor(
            UIManager.getColor("Table.selectionBackground"));
    }
}