我正在开发一款小型纸牌游戏,并且遇到了一些麻烦:当我尝试向我的JLayeredPane
添加动态组件时,它不显示它们。JLayeredPane显示问题
我有一个自定义组件代表一个卡,我想以分层的方式显示其中的2个。对此,我有以下类:
public class PairView extends JPanel {
private JLayeredPane layeredPane;
private CardView attackCard;
private CardView defenceCard;
private static Point origin = new Point(0, 0);
private static int offset = 10;
public PairView() {
}
public PairView(Card attackCard) {
setLayout(new BoxLayout(this, BoxLayout.PAGE_AXIS));
layeredPane = new JLayeredPane();
layeredPane.setPreferredSize(new Dimension(120, 170));
this.defenceCard = null;
this.attackCard = new CardView(attackCard);
this.attackCard.setOpaque(true);
this.attackCard.setForeground(Color.black);
this.attackCard.setBorder(BorderFactory.createLineBorder(Color.black));
this.attackCard.setBounds(origin.x, origin.y, 100, 150);
layeredPane.add(this.attackCard, 0);
this.origin.x += offset;
this.origin.y += offset;
}
public void addDefenceCard(Card defenceCard) throws DurakException {
if (this.defenceCard == null) {
this.defenceCard = new CardView(defenceCard);
this.defenceCard.setOpaque(true);
this.defenceCard.setForeground(Color.black);
this.defenceCard.setBorder(BorderFactory.createLineBorder(Color.black));
this.defenceCard.setBounds(origin.x, origin.y, 100, 150);
layeredPane.add(this.defenceCard, 1);
} else {
throw new DurakException("A defence Card is already present");
}
}
我通过阻力测试此拖放在NetBeans接口,我有以下问题:
- 据我所知,默认的构造函数是始终调用,所以当我创建2个随机
CardView
组件并将它们添加到默认构造函数的分层窗格中时,父项JFrame
显示它们就好了。 - 如果我使用覆盖的构造函数或尝试添加另一个组件(如
addDefenceCard
方法),它不会显示添加的组件。 - 致电
revalidate()
或repaint()
没有做任何事情。
如何让组件显示?
*“如何让组件显示?”*我补充说这是一个问题。如果这是**不是**的问题,请[编辑](http://stackoverflow.com/posts/32781510/edit)并添加一个.. –