WheelPanAction.java 文件源码

public State mouseWheelMoved (Widget widget, WidgetMouseWheelEvent event) {
    JComponent view = widget.getScene ().getView ();
    Rectangle visibleRect = view.getVisibleRect ();
    int amount = event.getWheelRotation () * 64;

    switch (event.getModifiers () & (InputEvent.SHIFT_MASK | InputEvent.CTRL_MASK | InputEvent.ALT_MASK)) {
        case InputEvent.SHIFT_MASK:
            visibleRect.x += amount;
            break;
        case 0:
            visibleRect.y += amount;
            break;
        default:
            return State.REJECTED;
    }

    view.scrollRectToVisible (visibleRect);
    return State.CONSUMED;
}