QuietEditorPane.java 文件源码

@Override
public void dragEnter(DropTargetDragEvent dtde) {
    Collection<? extends ExternalDropHandler> handlers = Lookup.getDefault().lookupAll(ExternalDropHandler.class);
    for (ExternalDropHandler handler : handlers) {
        if (handler.canDrop(dtde)) {
            dtde.acceptDrag(DnDConstants.ACTION_COPY);
            isDragging = false;
            return;
        }
    }

    orig.dragEnter(dtde);
    isDragging = true;
}