Java Swing 如何在 Nimbus 中设置 JButton 大小？

Question

我试图让我的按钮在我的 GUI 中具有相同的大小。但是，每当我设置 PreferredSize() 时，Nimbus 似乎会自动设置某些按钮的高度。让 Nimbus 使所有按钮具有相同大小(即宽度和高度)的最佳方法是什么？在下面的示例代码中，第一行按钮的高度是正确的，但宽度不是。在第二行中，宽度正确但高度不正确。如何让所有按钮在 Nimbus 中显示相同的大小？

public class SampleNimbusProblem extends javax.swing.JDialog {

    /** Creates new form SampleNimbusProblem */
    public SampleNimbusProblem(java.awt.Frame parent, boolean modal) {
        super(parent, modal);
        initComponents();
    }

    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {
        java.awt.GridBagConstraints gridBagConstraints;

        jPanel1 = new javax.swing.JPanel();
        okButton = new javax.swing.JButton();
        cancelButton = new javax.swing.JButton();
        jPanel2 = new javax.swing.JPanel();
        okButton1 = new javax.swing.JButton();
        cacelButton2 = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE);
        getContentPane().setLayout(new java.awt.GridBagLayout());

        jPanel1.setLayout(new java.awt.GridBagLayout());

        okButton.setText("OK");
        okButton.setMaximumSize(new java.awt.Dimension(65, 23));
        okButton.setMinimumSize(new java.awt.Dimension(65, 23));
        okButton.setPreferredSize(new java.awt.Dimension(65, 23));
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 0;
        gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
        gridBagConstraints.insets = new java.awt.Insets(5, 5, 5, 5);
        jPanel1.add(okButton, gridBagConstraints);

        cancelButton.setText("Cancel");
        cancelButton.setMaximumSize(new java.awt.Dimension(65, 23));
        cancelButton.setMinimumSize(new java.awt.Dimension(65, 23));
        cancelButton.setPreferredSize(new java.awt.Dimension(65, 23));
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 1;
        gridBagConstraints.gridy = 0;
        gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
        gridBagConstraints.insets = new java.awt.Insets(5, 5, 5, 5);
        jPanel1.add(cancelButton, gridBagConstraints);

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 1;
        gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
        gridBagConstraints.insets = new java.awt.Insets(5, 5, 5, 5);
        getContentPane().add(jPanel1, gridBagConstraints);

        jPanel2.setLayout(new java.awt.GridBagLayout());

        okButton1.setText("OK");
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 0;
        gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.NORTHWEST;
        gridBagConstraints.insets = new java.awt.Insets(5, 5, 5, 5);
        jPanel2.add(okButton1, gridBagConstraints);

        cacelButton2.setText("Cancel");
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 1;
        gridBagConstraints.gridy = 0;
        gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
        gridBagConstraints.insets = new java.awt.Insets(5, 5, 5, 5);
        jPanel2.add(cacelButton2, gridBagConstraints);

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
        gridBagConstraints.insets = new java.awt.Insets(5, 5, 5, 5);
        getContentPane().add(jPanel2, gridBagConstraints);

        pack();
    }// </editor-fold>

    /**
    * @param args the command line arguments
    */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                SampleNimbusProblem dialog = new SampleNimbusProblem(new javax.swing.JFrame(), true);
                dialog.addWindowListener(new java.awt.event.WindowAdapter() {
                    public void windowClosing(java.awt.event.WindowEvent e) {
                        System.exit(0);
                    }
                });
                dialog.setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify
    private javax.swing.JButton cacelButton2;
    private javax.swing.JButton cancelButton;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JPanel jPanel2;
    private javax.swing.JButton okButton;
    private javax.swing.JButton okButton1;
    // End of variables declaration

}

Answer 1

标准化大小的一种方法是将组件放入 GridLayout 中.参见 Laying Out Components Within a Container了解更多详情。

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..whenever I setPreferredSize(),

顺便说一句 - 很少(如果有的话)需要设置首选大小。让布局管理器(使用适当的填充和边框)完成跨不同屏幕分辨率、尺寸、PLAF 和版本计算组件正确尺寸的繁重工作。