FileDropTargetListener.java 文件源码

@Override
public void dragOver(DropTargetDragEvent dtde) {
    if ((dtde.isDataFlavorSupported(DataFlavor.javaFileListFlavor) || (uriFlavor != null && dtde
            .isDataFlavorSupported(uriFlavor)))
            && canOpenFile())
        dtde.acceptDrag(DnDConstants.ACTION_REFERENCE);
    else
        dtde.rejectDrag();
}