我遇到了 GridBagLayouts 的问题。
我有一些组件如下图所示：
如果“顶部”组件收缩得足够小，我希望“中心”组件能够移动到“右上角”的底部边缘上方。但是，这显然会导致问题，因为它必须在网格中的不同行中才能这样做。
为了解决这个问题 - 我将整个右列定义为其自己的容器，并具有自己的布局管理器。我希望这两列能够独立运行，但是我遇到了同样的问题！我看不出这两个布局管理器是如何交互的。谁能解释我的问题是什么？
这是相关代码（在我的类扩展Applet）：
public void init(){
addComponents();
}
private void addComponents(){
setLayout(new GridBagLayout());
GridBagConstraints c = new GridBagConstraints();
Left left = new Left();
Top top = new Top();
Center center = new Center();
TopRight topRight = new TopRight();
BottomRight bottomRight = new BottomRight();
Bottom bottom = new Bottom();
topRight.setPreferredSize(new Dimension(200,200));
top.setPreferredSize(new Dimension(0,200));
center.setPreferredSize(new Dimension(0,100));
container.setPreferredSize(new Dimension(200,200));
c.fill = GridBagConstraints.BOTH;
c.gridx = 0; c.gridy = 0;
c.gridwidth = 1; c.gridheight = 3;
c.weightx = 0.2; c.weighty = 1.0;
this.add(left,c);
c.gridx = 1; c.gridy = 0;
c.gridwidth = 1; c.gridheight = 1;
c.weightx = 0.8; c.weighty = 0.8;
this.add(top,c);
c.gridx = 1; c.gridy = 1;
c.gridwidth = 1; c.gridheight = 1;
c.weightx = 0.8; c.weighty = 0.0;
this.add(center,c);
c.gridx = 1; c.gridy = 2;
c.gridwidth = 1; c.gridheight = 1;
c.weightx = 0.8; c.weighty = 0.2;
this.add(bottom,c);
JPanel container = new JPanel();
container.setLayout(new GridBagLayout());
c.gridx = 2; c.gridy = 0;
c.gridwidth = 1; c.gridheight = 3;
c.weightx = 0.0; c.weighty = 1.0;
this.add(container,c);
GridBagConstraints c2 = new GridBagConstraints();
c2.fill = GridBagConstraints.BOTH;
c2.gridx = 0; c2.gridy = 0;
c2.gridwidth = 1; c2.gridheight = 1;
c2.weightx = 0.0; c2.weighty = 0.0;
container.add(topRight,c2);
c2.gridx = 0; c2.gridy = 1;
c2.gridwidth = 1; c2.gridheight = 1;
c2.weightx = 0.0; c2.weighty = 1.0;
container.add(bottomRight,c2);
}
注意：显示的每个组件（左、上等）都是 JPanel 的扩展 - 每个组件都覆盖了它的 paint(Graphics g) 方法以用一些颜色填充它。
在此先感谢，并为长期阅读感到抱歉，
乔纳森