如何在 GridBagLayout 中调整 JPanel 的大小?
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【中文标题】如何在 GridBagLayout 中调整 JPanel 的大小?【英文标题】:How to adjust size of JPanel in GridBagLayout? 【发布时间】:2015-11-17 20:26:26 【问题描述】:我确信这个问题可能是重复的,但我仍然在发布,因为我无法找到解决方案/更正代码中的错误。我的 Java GUI 的一部分使用了 GridBagLayout。此布局将包含 3 个组件,2 个单选按钮将位于顶部(并排放置),其余空间应有一个 JPanel(从单选按钮下方的下一行开始,直到可用空间结束)。我在论坛和外部查看了不同的示例,但无法解决问题。
使用以下代码,我的 GUI 部分如下所示:
ImageDisplay = new JPanel(new GridBagLayout());
GridBagConstraints g = new GridBagConstraints();
g.insets = new Insets(5, 5, 5, 5); // insets for all components
rawImage = new JRadioButton("Raw", true);
peakPickedImage = new JRadioButton("Peak picked");
radioButtonGroup.add(rawImage);
radioButtonGroup.add(peakPickedImage);
g.fill = GridBagConstraints.HORIZONTAL;
g.gridx = 0;
g.gridy = 0;
g.gridwidth = 1;
g.gridheight = 1;
ImageDisplay.add(rawImage, g);
g.gridx = 1;
g.gridy = 0;
g.gridwidth = 1;
g.gridheight = 1;
g.weightx = 0;
g.weighty = 0;
ImageDisplay.add(peakPickedImage, g);
JPanel imagePanel = new JPanel();
g.gridx = 0;
// g.gridy = 0;
g.weightx = 1.0;
g.weighty = 0.75;
g.gridwidth = 3;
g.gridheight = 3;
// g.fill = GridBagConstraints.BOTH;
// g.fill = GridBagConstraints.SOUTH;
imagePanel.setBorder(BorderFactory.createEtchedBorder());
ImageDisplay.add(imagePanel, g);
并且,取消注释
g.fill = GridBagConstraints.BOTH;
我得到了 JPanel,其中包含两个单选按钮。如何解决这个问题?
【问题讨论】:
【参考方案1】:试试这样:
JPanel ImageDisplay = new JPanel(new GridBagLayout());
GridBagConstraints g = new GridBagConstraints();
g.insets = new Insets(5, 5, 5, 5); // insets for all components
g.weightx = 0.0;
g.weighty = 0.0;
JRadioButton rawImage = new JRadioButton("Raw", true);
JRadioButton peakPickedImage = new JRadioButton("Peak picked");
ButtonGroup radioButtonGroup = new ButtonGroup();
radioButtonGroup.add(rawImage);
radioButtonGroup.add(peakPickedImage);
g.fill = GridBagConstraints.HORIZONTAL;
g.gridx = 0;
g.gridy = 0;
g.gridwidth = 1;
g.gridheight = 1;
ImageDisplay.add(rawImage, g);
g.gridx = 1;
g.gridy = 0;
ImageDisplay.add(peakPickedImage, g);
JPanel imagePanel = new JPanel();
g.gridx = 0;
g.gridy = 1;
g.gridwidth = 2;
g.weightx = 1.0; // fill the rest of the space
g.weighty = 1.0;
g.fill = GridBagConstraints.BOTH;
imagePanel.setBorder(BorderFactory.createEtchedBorder());
ImageDisplay.add(imagePanel, g);
【讨论】:
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