Java ScrollPanel.getHeight示例

 public void updateScrollSize() {
   setY(scrollPanel.getScrollSize());
   setWidth(scrollPanel.getScrollSize());
   setHeight(scrollPanel.getHeight() - scrollPanel.getScrollSize());
   btnUp.setDimensions(scrollPanel.getScrollSize(), scrollPanel.getScrollSize());
   btnUp.getButtonIcon().centerToParent();
   btnDown.setDimensions(scrollPanel.getScrollSize(), scrollPanel.getScrollSize());
   btnDown.getButtonIcon().centerToParent();
   track.setY(scrollPanel.getScrollSize());
   track.setHeight(getHeight() - (scrollPanel.getScrollSize() * 2));
   track.setWidth(scrollPanel.getScrollSize());
   thumb.setWidth(scrollPanel.getScrollSize());
   btnUp.setY(getHeight() - scrollPanel.getScrollSize());
 }