在scrollPane

Question

我一直致力于使用Swing创建表单，以编程方式将自定义组件添加到ScrollPane中，以便组件具有固定大小，并且添加更多组件时，它们将添加到前一个下方，并且可以滚动到。 / p>

我一直在努力使用Swing中的各种大小功能。目前，我设法以编程方式将子组件添加到scrollPane中的面板中，并在添加更多子项时调整该面板的大小。然而，孩子们目前正试图填满整个小组，随着更多孩子的增加而缩小，直到他们达到最小尺寸。只有达到此最小尺寸后，面板才会扩展以适应新的组件。我已经使用了setSize和setPreferredSize的各种组合，但我还没能让它正常工作。

Here就是表格。

Here只需点击一下按钮即可。

Here点击两次后。

Here只需点击几下即可。

这是我用于测试的数据对象。

SimpleData.java

public class SimpleData {

    public SimpleData(String s0,String s1)
    {
        name = s0;
        ID = s1;
    }

    public String name;
    public String ID;

}

以下是组件的代码。

SimpleComponent.java

import javax.swing.*;
import java.awt.*;
import java.util.function.BiFunction;
import java.util.function.Supplier;


public class SimpleComponent extends JPanel
{
    private JPanel mainPanel;
    private JLabel mainName;

    private JPanel sectionName;
    private JLabel labelName;
    private JTextField textName;

    private JPanel sectionID;
    private JLabel labelID;
    private JTextField textID;

    private SimpleComponent()
    {
        super();
    }

    public static SimpleComponent FromSimpleData(SimpleData data, Dimension size)
    {
        SimpleComponent ret = new SimpleComponent();

        BoxLayout lay = new BoxLayout(ret,BoxLayout.PAGE_AXIS);

        ret.setLayout(lay);

        BiFunction<JPanel,String,JTextField> makeTextField =
                (JPanel p,String s) ->
                {
                    JTextField tf;
                    tf = new JTextField(s == null ? "" : s);
                    p.add(tf);
                    return tf;
                };

        BiFunction<JPanel,String,JLabel> makeLabel =
                (JPanel p,String s) ->
                {
                    JLabel jl;
                    jl = new JLabel(s);
                    p.add(jl);
                    return jl;
                };

        Supplier<JPanel> makePanel =
                () ->
                {
                    JPanel p;
                    p = new JPanel();
                    BoxLayout bl = new BoxLayout(p,BoxLayout.X_AXIS);
                    p.setLayout(bl);
                    ret.add(p);
                    return p;
                };

        ret.mainPanel = makePanel.get();
        ret.mainName = makeLabel.apply(ret.mainPanel,data.name);

        ret.sectionName = makePanel.get();
        ret.labelName = makeLabel.apply(ret.sectionName,"Name:");
        ret.textName = makeTextField.apply(ret.sectionName,data.name);

        ret.sectionID = makePanel.get();
        ret.labelID = makeLabel.apply(ret.sectionID,"ID:");
        ret.textID = makeTextField.apply(ret.sectionID,data.ID);

        ret.setSize(size);
        ret.revalidate();

        return ret;
    }
}

以下是表单的java代码。

SimpleGUI.java

import javax.swing.*;
import java.awt.*;

public class simpleGUI {
    private JButton buttonAdd;
    private JPanel panelData;
    private JPanel panelMain;

    private static int count = 0;

    public static void main(String[] args) {
        JFrame frame = new JFrame("simpleGUI");

        simpleGUI sGUI = new simpleGUI();

        frame.setContentPane(sGUI.panelMain);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        sGUI.panelData.setLayout(
                new BoxLayout(
                        sGUI.panelData,
                        BoxLayout.PAGE_AXIS));

        sGUI.buttonAdd.addActionListener(
                (e)->{
                    Dimension size = sGUI.panelData.getSize();

                     String id = Integer.toString(count++);
                     String name = "DATA-" + id;
                     SimpleData data = new SimpleData(name,id);

                    SimpleComponent component = SimpleComponent.FromSimpleData(
                            data,
                            new Dimension(
                              10,
                              10));

                    sGUI.panelData.add(component);

                    Dimension newSize = new Dimension(size.width,size.height * 2);
                    sGUI.panelData.setSize(newSize);

                    sGUI.panelData.validate();
                });

        frame.pack();
        frame.setVisible(true);
    }
}

以下是使用InteliJ Idea生成的表单的XML。

SimpleGUI.form

<?xml version="1.0" encoding="UTF-8"?>
<form xmlns="http://www.intellij.com/uidesigner/form/" version="1" bind-to-class="simpleGUI">
  <grid id="27dc6" binding="panelMain" layout-manager="GridLayoutManager" row-count="2" column-count="1" same-size-horizontally="false" same-size-vertically="false" hgap="-1" vgap="-1">
    <margin top="0" left="0" bottom="0" right="0"/>
    <constraints>
      <xy x="20" y="20" width="500" height="400"/>
    </constraints>
    <properties/>
    <border type="none"/>
    <children>
      <component id="4a868" class="javax.swing.JButton" binding="buttonAdd">
        <constraints>
          <grid row="0" column="0" row-span="1" col-span="1" vsize-policy="0" hsize-policy="3" anchor="0" fill="1" indent="0" use-parent-layout="false"/>
        </constraints>
        <properties>
          <text value="Add"/>
        </properties>
      </component>
      <scrollpane id="29e66">
        <constraints>
          <grid row="1" column="0" row-span="1" col-span="1" vsize-policy="7" hsize-policy="7" anchor="0" fill="3" indent="0" use-parent-layout="false"/>
        </constraints>
        <properties>
          <verticalScrollBarPolicy value="22"/>
        </properties>
        <border type="none"/>
        <children>
          <grid id="2d3af" binding="panelData" layout-manager="GridLayoutManager" row-count="1" column-count="1" same-size-horizontally="false" same-size-vertically="false" hgap="-1" vgap="-1">
            <margin top="0" left="0" bottom="0" right="0"/>
            <constraints/>
            <properties/>
            <border type="none">
              <color color="-16729344"/>
            </border>
            <children/>
          </grid>
        </children>
      </scrollpane>
    </children>
  </grid>
</form>

我可以做些什么来完成我需要的行为？