获取Java Swing中组件的布局约束

Question

下面是我一直在研究的代码模拟.

public class Pane {

    private final JPanel pane;
    private JPanel namePanel;
    private final JTextField panIdField;

    public Pane() {
        pane = new JPanel();
        pane.setLayout(new MigLayout("", "[][grow]", "[][][][][]"));

        namePanel = new JPanel();
        pane.add(namePanel, "cell 1 1,growx");

        panIdField = new JTextField();
        pane.add(panIdField, "cell 1 2,growx");
        panIdField.setColumns(10);

    }

    public void replaceNameField(JPanel newNamePanel) {
        this.namePanel = newNamePanel;
        // Object constraintsForNamePanel = 
        pane.remove(namePanel);
        pane.add(newNamePanel, constraintsForNamePanel);
    }

}

在容器中有方法

public void add(Component comp, Object constraints)

有没有什么方法可以我们以编程方式获得constraints我们设置的内容,getConstraints(...)以便我们可以将它用于以后使用？

在我的代码中,我想使用它在同一个地方用新的组件替换旧组件.

我该怎么办？

 Object constraintsForNamePanel = 

得到约束namePanel.

目前,我正在使用

pane.add(newNamePanel, "cell 1 1,growx");

它正在工作,但问题是我WindowsBuilder用于UI,我的UI就像在我添加新组件时更改,我pane不想复制和粘贴约束.

Answer 1

得到了解决方案,我必须做到以下.

public void replaceNameField(JPanel newNamePanel) {
     MigLayout layout = (MigLayout) pane.getLayout();
     Object constraintsForNamePanel = layout.getComponentConstraints(this.namePanel);
     pane.remove(this.namePanel);

      this.namePanel = newNamePanel;
      pane.add(newNamePanel, constraintsForNamePanel);
    }