使用GridBagLayout在一个面板中设置多个组件，但是我不想填满整个面板

Question

我正在使用Java swing构建GUI的项目中。目前，我在Jpanel中有一个JFrame，其中应包含一个标签（问题）和一组按钮/文本字段（答案），可以根据所提出的问题进行更改。我想将问题集中在顶部的某个地方，将答案适当地放在中间的一个中心。目前，我使用GridBagLayout设置JLabel和JButton，但仍然没有成功。

public class QuestionPanel extends MoviePanel{

    private String question;

    public QuestionPanel(String type, Application app, String question) throws Exception{
        super(type, app);
        this.question = question;
        JLabel lab = new JLabel(this.question);

        this.getGbc().anchor = GridBagConstraints.PAGE_START;
        this.getGbc().fill = GridBagConstraints.HORIZONTAL;
        this.getGbc().weighty = 0.5;
        this.getGbc().gridx = 2;
        this.getGbc().gridy = 0;

        lab.setFont(new Font("Helvetica", Font.BOLD, 40));
        lab.setForeground(new Color(189, 189, 189, 255));
        add(lab, this.getGbc());

        getAnswers(type);
    }

    private void getAnswers(String type){
        if(type.equals("AgeRestriction")){
            this.getGbc().gridx=0;
            this.getGbc().gridy=1;
            add(new YesButton(this.getApp()),this.getGbc());

            this.getGbc().gridx = 3;
            this.getGbc().gridy = 1;
            add(new NoButton(this.getApp()),this.getGbc());
        }
    }
}

GridBagLayout被设置为super MoviePanel，this.getGbc()返回适当的GridBagConstraints。目前，我的布局如下所示：

这个想法是使yes和no按钮彼此靠近，将来的按钮动态地位于中心。

解决方案

我最终通过组合angushjoshi和c0der的答案来解决，因此在带有GridBagLayout的questionPanel中添加了一个answerPanel。我的代码现在看起来像这样：

public class QuestionPanel extends MoviePanel {

    private String question;
    private JPanel answerPanel = new JPanel();

    public QuestionPanel(String type, Application app, String question) throws Exception {
        super(type, app);
        this.question = question;
        JLabel lab = new JLabel(this.question);
        answerPanel.setOpaque(false);


        this.getGbc().anchor = GridBagConstraints.PAGE_START;
        this.getGbc().weighty = 1;
        this.getGbc().gridy = 0;
        this.getGbc().gridx = 2;
        this.getGbc().gridwidth = 3;

        lab.setFont(new Font("Helvetica", Font.BOLD, 40));
        lab.setForeground(new Color(189, 189, 189, 255));
        add(lab, this.getGbc());

        getAnswers(type);
    }

    public void getAnswers(String type) {
        if (type.equals("AgeRestriction")) {
            createYesNoButtons();
        }
        if (type.equals("Age")) {
            createAgeField();
        }
        if (type.equals("Genre")){
            createGenreButtons();
        }
        if (type.equals("Actor")){
            createActorField();
        }
    }


    private void createYesNoButtons() {
        this.getGbc().weighty = 0.5;
        this.getGbc().anchor = GridBagConstraints.CENTER;
       answerPanel.add(new YesButton(this.getApp()));
       answerPanel.add(new NoButton(this.getApp()));
       this.add(answerPanel,this.getGbc());
    }

    private void createAgeField() {
        this.getGbc().weighty = 0.5;
        this.getGbc().anchor = GridBagConstraints.CENTER;
        answerPanel.add(new AgeField(this.getApp()));
        this.add(answerPanel,this.getGbc());
    }

    private void createGenreButtons(){
    }

    private void createActorField(){
    }

}

现在面板看起来像这样：

感谢您的帮助！

Answer 1

我建议将布局分解为更小，更易于布局的部分。在这种情况下，请使用3个JPanel，并通过以下MRE进行演示：

Answer 2

很难为您提供解决问题的确切方法，但是我可以告诉您您可能想使用GridBagConstraints.insets和GridBagConstraints.anchor。