ImageCardListViewer.java 文件源码

private void setMouseWheelListener() {
    addMouseWheelListener(new MouseWheelListener() {
        @Override
        public void mouseWheelMoved(MouseWheelEvent event) {
            final int cardIndex = getCardIndexAt(event.getX(), event.getY());
            if (event.getWheelRotation() < 0) { // rotate mousewheel forward
                if (cardIndex >= 0) {
                    showCardPopup(cardIndex);
                }
            } else if (event.getWheelRotation() > 0) { // rotate mousewheel back
                if (cardIndex >= 0) {
                    controller.hideInfo();
                }
            }
        }
    });
}