Java tutorial
//package com.java2s; /* * This file is part of WebLookAndFeel library. * * WebLookAndFeel library is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * WebLookAndFeel library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with WebLookAndFeel library. If not, see <http://www.gnu.org/licenses/>. */ import javax.swing.*; import java.awt.*; public class Main { /** * Returns first parent component which supports dran and drop actions. * * @param component component to look parent supporting drop for * @param <T> parent supporting drop component class type * @return first parent component which supports dran and drop actions */ public static <T extends JComponent> T getFirstParentSupportingDrop(final Component component) { final Container parent = component.getParent(); if (parent instanceof JComponent) { final JComponent c = (JComponent) parent; if (c.getTransferHandler() != null) { return (T) c; } } return getFirstParentSupportingDrop(parent); } }