获取多行flowlayout的首选大小

Question

我无法找到一种在swing GUI中调整某些组件大小的方法.一些自定义标签正被添加到FlowLayout中,当调整对话框大小时,它不会表现如何.该小组正在使用jgoodies表单框架构建.

如果使用这个,将FlowLayout添加到xy(3,y)

FormLayout layout = new FormLayout("r:d, 5px, f:d:g", // columns
            "p, p, 5px, p, 5px, p") // rows

FlowLayout展开并显示滚动条

如果使用

FormLayout layout = new FormLayout("r:d, 5px, f:10:g", // columns
            "p, p, 5px, p, 5px, p") // rows

FlowLayout使用可用空间,第二行上的项目消失

我想将包含FlowLayout的每一行的高度扩展到组件的当前高度.不幸的是,首选大小始终对应于单行的高度.
另一种布局会更合适吗？左侧的粗体文本应右对齐,然后是FlowLayout.

来源

[编辑]在试图弄清楚如何执行这几周后,实际的问题可以恢复到这样:
一组标签被添加到JPanel.此JPanel应水平使用所有可用空间(对话框大小减去标签名称标签的宽度)并根据需要垂直展开.如果JPanel的高度比对话框大,则应显示垂直滚动条(水平滚动条永远不可见).对话框可以显示多个JPanel,它们将一个接一个地显示(垂直).

这是使用GridBagLayout和WrapLayout的尝试:

public class GridBagLayoutTagPanel extends JPanel {
private static final long serialVersionUID = -441746014057882848L;
private final int NB_TAGS = 5;

public GridBagLayoutTagPanel() {
    setLayout(new GridLayout());

    JPanel pTags = new JPanel(new GridBagLayout());
    pTags.setBackground(Color.ORANGE);
    GridBagConstraints c = new GridBagConstraints();
    c.ipadx = 5;
    c.ipady = 5;

    int rowIndex = 0;
    for (int i = 0; i < NB_TAGS; i++) {
        //add tag name
        JLabel lTagName = new JLabel(String.format("Tag %s:", i));
        lTagName.setFont(lTagName.getFont().deriveFont(Font.BOLD));
        c.fill = GridBagConstraints.NONE;
        c.gridx = 0;
        c.gridy = rowIndex++;
        pTags.add(lTagName, c);

        //add tag values
        JPanel pTag = new JPanel(new BorderLayout());
        pTag.add(new JLabel("+"), BorderLayout.LINE_START); //label used to add new tags
        pTag.add(getWrapPanel(), BorderLayout.CENTER); //the list of tag values
        c.fill = GridBagConstraints.HORIZONTAL;
        c.gridx = 1;
        pTags.add(pTag, c);
    }

    //JScrollPane sp = new JScrollPane(pTags);
    //sp.setBorder(BorderFactory.createEmptyBorder());

    add(pTags);
    }

private static JPanel getWrapPanel() {
   JPanel p = new JPanel(new WrapLayout(FlowLayout.LEFT, 5, 0));

   for (int i = 0; i < 50; i++) {
           p.add(new JLabel("t" + i));
   }
   return p;
}

public static void main(String[] args) {
    JFrame f = new JFrame();
    f.getContentPane().add(new GridBagLayoutTagPanel());
    f.setSize(new Dimension(500, 300));
    f.setVisible(true);
}
}

Answer 1

我想将包含FlowLayout的每一行的高度扩展到组件的当前高度.不幸的是,首选大小始终对应于单行的高度.

Wrap Layout处理此问题.

Answer 2

在 Rob 的帮助下并使用他的WrapPanel和ScrollablePanel，它现在可以完全正常工作

public class GridBagLayoutTagPanel extends JPanel {
  private final int NB_TAGS = 5;
  private final int NB_TAGVALUES = 50;

  public GridBagLayoutTagPanel() {
    setLayout(new GridLayout());

    ScrollablePanel pTags = new ScrollablePanel(new GridBagLayout());
    pTags.setScrollableWidth(ScrollablePanel.ScrollableSizeHint.FIT);
    pTags.setBackground(Color.ORANGE);
    GridBagConstraints c = new GridBagConstraints();
    c.ipadx = 5;
    c.ipady = 5;

    int rowIndex = 0;
    for (int i = 0; i < NB_TAGS; i++) {
      // add tag name
      JLabel lTagName = new JLabel(String.format("Tag %s:", i));
      lTagName.setFont(lTagName.getFont().deriveFont(Font.BOLD));
      c.fill = GridBagConstraints.NONE;
      c.gridx = 0;
      c.gridy = rowIndex++;
      c.weightx = 0; // keep minimum size of the cell containing the label when resizing
      c.weighty = 0;
      pTags.add(lTagName, c);

      // add tag values
      JPanel pTag = new JPanel(new BorderLayout());
      pTag.add(new JLabel("+"), BorderLayout.LINE_START); // label used to add new tags
      pTag.add(getWrapPanel(), BorderLayout.CENTER); // the list of tag values
      c.fill = GridBagConstraints.HORIZONTAL;
      c.gridx = 1;
      c.weightx = 1; // fill horizontally
      c.weighty = 1;
      pTags.add(pTag, c);
   }

   JScrollPane sp = new JScrollPane(pTags);
   sp.setBorder(BorderFactory.createEmptyBorder());

   add(sp);
  }

  private JPanel getWrapPanel() {
    JPanel p = new JPanel(new WrapLayout(FlowLayout.LEFT, 5, 0));

    for (int i = 0; i < NB_TAGVALUES; i++) {
      p.add(new JLabel("t" + i));
    }

    p.setSize(400, 1);
    return p;
  }

  public static void main(String[] args) {
    JFrame f = new JFrame();
    f.getContentPane().add(new GridBagLayoutTagPanel());
    f.setSize(new Dimension(500, 300));
    f.setVisible(true);
  }
}