如何告诉GridBagLayout不要调整我的组件大小

Question

我在垂直JSplitPane中有JPanel。 JPanel包含jlabels和jtextfields。通过移动JSplitPane的分隔符缩小JPanel的高度jpanel中的所有组件都会自行调整大小。如何告诉他们在父jpanel的高度缩小时不调整大小。 我无法为JPanel调整minSize的大小，因为它使JSplitPane无法移动分隔符。

JSplitPane splitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT);
        splitPane.setDividerSize(10);
        splitPane.setOneTouchExpandable(true);

        JPanel searchPanel = createSearchPanel();
        splitPane.setDividerLocation(searchPanel.getPreferredSize().height + 5);
        splitPane.setTopComponent(searchPanel);

如您所见searchPanel。我们来看看：

JPanel searchPanel = new JPanel(new GridBagLayout()) {
            Dimension minSize = new Dimension(200, 0);

            @Override
            public Dimension getMinimumSize() {
                return minSize;
            }
        };
        searchPanel.setBorder(BorderFactory.createTitledBorder("Search query"));
        GridBagConstraints gbc = new GridBagConstraints(0, 0, 1, 1, 0, 0,
                GridBagConstraints.LINE_START, GridBagConstraints.HORIZONTAL,
                new Insets(5, 2, 5, 3), 0, 0);
        searchPanel.add(eventLabel, gbc);
        gbc.gridx = 1;
        gbc.gridwidth = 3;
        searchPanel.add(eventLabelField, gbc);
        gbc.gridx = 0;
        gbc.gridy = 1;
        gbc.gridwidth = 1;
        searchPanel.add(timestampLabel, gbc);
        gbc.gridx = 1;
        searchPanel.add(timestampStartField, gbc);
        gbc.gridx = 2;
        searchPanel.add(timestammpToLabel, gbc);
        gbc.gridx = 3;
        searchPanel.add(timestampEndField, gbc);
        gbc.gridx = 0;
        gbc.gridy = 2;
        searchPanel.add(locationLabel, gbc);
        gbc.gridx = 1;
        gbc.gridy = 2;
        gbc.gridwidth = 3;
        searchPanel.add(locationField, gbc);
        gbc.gridx = 0;
        gbc.gridy = 3;
        gbc.gridwidth = 1;
        searchPanel.add(durationMagnitudeLabel, gbc);
        gbc.gridx = 1;
        gbc.gridy = 3;
        searchPanel.add(durationMagnitudeMinField, gbc);
        gbc.gridx = 2;
        searchPanel.add(durationToLabel, gbc);
        gbc.gridx = 3;
        searchPanel.add(durationMagnitudeMaxField, gbc);
        gbc.gridx = 1;
        gbc.gridy = 4;
        gbc.gridwidth = 2;
        gbc.anchor = GridBagConstraints.PAGE_END;
        gbc.weighty = 1.0;
        gbc.ipadx = 2;
        gbc.ipady = 2;
        gbc.insets = new Insets(15, 0, 0, 0);
        searchPanel.add(searchButton, gbc);

当我向上移动垂直分隔线时，searchPanel的高度会缩小，组件看起来像：

你看到jtextFields比我移动divider后小得多

请帮帮我。

Answer 1

我已经更改了你的代码。使用GridBagConstraint的 weightx 属性和GridBagConstraints.HORIZONTAL填充，它可以帮助组件正确填充其单元格。 示例代码：

    JPanel searchPanel = new JPanel(new GridBagLayout()) {
        Dimension minSize = new Dimension(200, 0);

        @Override
        public Dimension getMinimumSize() {
            return minSize;
        }
    };
    searchPanel.setBorder(BorderFactory.createTitledBorder("Search query"));
    GridBagConstraints gbc = new GridBagConstraints(0, 0, 1, 1, 0, 0,
            GridBagConstraints.LINE_START, GridBagConstraints.HORIZONTAL,
            new Insets(5, 2, 5, 3), 0, 0);
    searchPanel.add(new JLabel("1"), gbc);
    gbc.gridx = 1;
    gbc.gridwidth = 3;
    gbc.weightx = 1;
    searchPanel.add(new JTextField(), gbc);
    gbc.gridx = 0;
    gbc.gridy = 1;
    gbc.gridwidth = 1;
    gbc.weightx = 0;
    searchPanel.add(new JLabel("1"), gbc);
    gbc.gridx = 1;
    gbc.weightx = 1;
    searchPanel.add(new JTextField(), gbc);
    gbc.gridx = 2;
    gbc.weightx = 0;
    searchPanel.add(new JLabel("1"), gbc);
    gbc.gridx = 3;
    gbc.weightx = 1;
    searchPanel.add(new JTextField(), gbc);
    gbc.gridx = 0;
    gbc.gridy = 2;
    gbc.weightx = 0;
    searchPanel.add(new JLabel("1"), gbc);
    gbc.gridx = 1;
    gbc.gridy = 2;
    gbc.gridwidth = 3;
    gbc.weightx = 1;
    searchPanel.add(new JTextField(), gbc);
    gbc.gridx = 0;
    gbc.gridy = 3;
    gbc.gridwidth = 1;
    gbc.weightx = 0;
    searchPanel.add(new JLabel("1"), gbc);
    gbc.gridx = 1;
    gbc.gridy = 3;
    gbc.weightx = 1;
    searchPanel.add(new JTextField(), gbc);
    gbc.gridx = 2;
    gbc.weightx = 0;
    searchPanel.add(new JLabel("1"), gbc);
    gbc.gridx = 3;
    gbc.weightx = 1;
    searchPanel.add(new JTextField(), gbc);
    gbc.gridx = 1;
    gbc.gridy = 4;
    gbc.gridwidth = 2;
    gbc.anchor = GridBagConstraints.PAGE_END;
    gbc.weighty = 1.0;
    gbc.ipadx = 2;
    gbc.ipady = 2;
    gbc.insets = new Insets(15, 0, 0, 0);
    gbc.weightx = 0;
    searchPanel.add(new JButton("b"), gbc);
    return searchPanel;

观看docs How to use GridBagLayout

结果：

编辑：对不起，我在标签上使用了糟糕的名字）

Answer 2

在底部添加一个虚拟JPanel，并为JPanel设置weightY = 1。 ALl其余组件应具有权重Y = 0。因此，在高度增加时，所有附加像素都以虚拟JPanel为目标。