如何使所有这些摆动控件具有相同的宽度？

Question

我希望数据、视图和格式组具有与运动控件相同的宽度。我尝试了 setMinimumSize(new Dimension(250,30)) 但没有效果。

class DeeLiteControlPanel extends JPanel
{
    public DeeLiteControlPanel()
    {
        setBounds(0, 140, 250, 550);
        JPanel dataGroup = createGroupWithName("Data");

        add(dataGroup);

        JButton loadBtn = new JButton("Load data");
        dataGroup.add(loadBtn);

        JPanel viewGroup = createGroupWithName("View");
        viewGroup.setLayout(new BorderLayout(5, 5));
        add(viewGroup);

        JButton skyBtn = new JButton("View from sky");
        viewGroup.add(skyBtn, BorderLayout.NORTH);

        final JToggleButton chaseBtn = new JToggleButton("Chase Vehicle");
        viewGroup.add(chaseBtn, BorderLayout.EAST);

        _vehicleList = new JComboBox();
        _vehicleList.setEditable(false);
        viewGroup.add(_vehicleList, BorderLayout.WEST);

        JButton fitToWinBtn = new JButton("Fit to Window");
        viewGroup.add(fitToWinBtn, BorderLayout.SOUTH);

        JPanel formattingGroup = createGroupWithName("Formatting");
        formattingGroup.setMinimumSize(new Dimension(250, 20));
        formattingGroup.setLayout(new GridLayout(5, 0));
        add(formattingGroup);

        final JCheckBox showSurface = new JCheckBox("Show surface");
        showSurface.setSelected(true);
        formattingGroup.add(showSurface);

        final JCheckBox showTerrain = new JCheckBox("Show terrain");
        showTerrain.setSelected(true);
        formattingGroup.add(showTerrain);

        final JCheckBox showVehicleStatus = new JCheckBox("Show vehicle status");
        showVehicleStatus.setSelected(true);
        formattingGroup.add(showVehicleStatus);

        JPanel pnl = createGroupWithName("Depth Stretch");
        formattingGroup.add(pnl);
        JSlider slider = new JSlider(0, 10);
        pnl.add(slider);
    }

    public static JPanel createGroupWithName(String name)
    {
        JPanel pnl = new JPanel();
        pnl.setBorder(BorderFactory.createTitledBorder(BorderFactory.createEtchedBorder(), name));
        pnl.setMinimumSize(new Dimension(250, 30));
        return pnl;
    }
}

Answer 1

摆脱所有 setBounds(...) 的使用，并考虑对主 JPanel 使用 BoxLayout：

public DeeLiteControlPanel() {
   // setBounds(0, 140, 250, 550);
   setLayout(new BoxLayout(this, BoxLayout.PAGE_AXIS));

例如，

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

@SuppressWarnings("serial")
public class DeeLiteControlPanel extends JPanel {
   public DeeLiteControlPanel() {
      // setBounds(0, 140, 250, 550);
      setLayout(new BoxLayout(this, BoxLayout.PAGE_AXIS));

      JPanel dataGroup = createGroupWithName("Data");


      add(dataGroup);

      JButton loadBtn = new JButton("Load data");
      dataGroup.add(loadBtn);

      JPanel viewGroup = createGroupWithName("View");
      viewGroup.setLayout(new BorderLayout(5, 5));
      add(viewGroup);

      JButton skyBtn = new JButton("View from sky");
      viewGroup.add(skyBtn, BorderLayout.NORTH);

      final JToggleButton chaseBtn = new JToggleButton("Chase Vehicle");
      viewGroup.add(chaseBtn, BorderLayout.EAST);

      JComboBox _vehicleList = new JComboBox();
      _vehicleList.setEditable(false);
      viewGroup.add(_vehicleList, BorderLayout.WEST);

      JButton fitToWinBtn = new JButton("Fit to Window");
      viewGroup.add(fitToWinBtn, BorderLayout.SOUTH);

      JPanel formattingGroup = createGroupWithName("Formatting");
      formattingGroup.setMinimumSize(new Dimension(250, 20));
      formattingGroup.setLayout(new GridLayout(5, 0));
      add(formattingGroup);

      final JCheckBox showSurface = new JCheckBox("Show surface");
      showSurface.setSelected(true);
      formattingGroup.add(showSurface);

      final JCheckBox showTerrain = new JCheckBox("Show terrain");
      showTerrain.setSelected(true);
      formattingGroup.add(showTerrain);

      final JCheckBox showVehicleStatus = new JCheckBox("Show vehicle status");
      showVehicleStatus.setSelected(true);
      formattingGroup.add(showVehicleStatus);

      JPanel pnl = createGroupWithName("Depth Stretch");
      formattingGroup.add(pnl);
      JSlider slider = new JSlider(0, 10);
      pnl.add(slider);
   }

   public static JPanel createGroupWithName(String name) {
      JPanel pnl = new JPanel();
      pnl.setBorder(BorderFactory.createTitledBorder(
            BorderFactory.createEtchedBorder(), name));
      pnl.setMinimumSize(new Dimension(250, 30));
      return pnl;
   }

   private static void createAndShowGui() {
      DeeLiteControlPanel mainPanel = new DeeLiteControlPanel();

      JFrame frame = new JFrame("DeeliteControlPanel");
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      frame.getContentPane().add(mainPanel);
      frame.pack();
      frame.setLocationByPlatform(true);
      frame.setVisible(true);
   }

   public static void main(String[] args) {
      SwingUtilities.invokeLater(new Runnable() {
         public void run() {
            createAndShowGui();
         }
      });
   }
}

Answer 2

将 GridBagLayout 设置为 DeeLiteControlPanel 或为所有面板调用 setPreferredSize() 方法 - 数据、视图和格式。

class DeeLiteControlPanel extends JPanel
{
    public DeeLiteControlPanel()
    {
      setLayout(new GridBagLayout());
      GridBagConstraints gs=new GridBagConstraints();

      gs.anchor=GridBagConstraints.NORTHWEST;
      gs.fill=GridBagConstraints.BOTH; //or HORIZONTAL

      gs.gridx=0;
      gs.gridy=0;
      add(dataGroup,gs);

      gs.gridx=0;
      gs.gridy=1;
      add(viewGroup,gs);
      ....
     }
  }

Answer 3

如果你愿意的话，你可以使用强大的GroupLayout。它工作完美，让您可以很好地控制组件的尺寸以及如何将它们的尺寸结合在一起。大多数情况下，我让 Netbeans 来处理这一切。