我如何在Java swing中进行这种布局？

Question

我有一个非常具体的布局，我一直试图完成一段时间没有成功。我试图创建的布局只是放置一个固定高度的JPanel，位于另一个面板的垂直中心。水平方向，它应该伸展以适应另一方的界限。

同样，需要的是：

1. 两个JPanel，一个放在另一个
中
2. 内部面板应具有静态高度
3. 内部面板应垂直居中
4. 内板应水平拉伸，以与外板的侧面相接触。

以下是此示例的图片：

根据几个人要求我发布不起作用的代码：

JPanel MainPanel = new JPanel();
frmPhoneClicker.getContentPane().add(MainPanel);
MainPanel.setLayout(new MigLayout("", "[984px]", "[165px]"));


Panel subPanel = new JPanel();
subPanel.setLayout(new FlowLayout(FlowLayout.CENTER, 5, 5));
MainPanel.add(subPanel, "cell 0 0 1 1,growx,aligny center");

Answer 1

您肯定需要了解有关Layouts的更多信息GridBagLayout会有所帮助。但是你走了：

// your Panels
JPanel mainPanel = new JPanel();
JPanel subPanel = new JPanel();
mainPanel.setLayout(new GridBagLayout()); // use GridBagLayout with mainPanel
subPanel.setPreferredSize(new Dimension (0,165)); // use a preferred height for the subPanel
GridBagConstraints c = new GridBagConstraints(); // your gridBagLayout Constraints
c.fill = GridBagConstraints.HORIZONTAL; // stretch subPanel horizontal
c.weightx = 1.0; // with 100% of screen
mainPanel.add(subPanel,c); // add sub to mainPanel with the constraints

Answer 2

一个完整的工作示例，颜色可以遵循您的方案：

import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Toolkit;
import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JPanel;


public class testPanel extends JFrame{

    public testPanel() {
        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
        int screenHeight = screenSize.height;
        int screenWidth = screenSize.width;
        this.setSize(screenWidth / 2, screenHeight * 2 / 3);

        this.setLocationRelativeTo(null);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        this.setResizable(true);
        this.setAlwaysOnTop(false);
        this.setUndecorated(false);

        JPanel outerPanel = new JPanel(new GridBagLayout());
        outerPanel.setBorder(BorderFactory.createLineBorder(Color.RED));
        JPanel innerPanel = new JPanel();
        innerPanel.setBorder(BorderFactory.createLineBorder(Color.BLUE));
        innerPanel.setPreferredSize(new Dimension (0,300));

        GridBagConstraints c = new GridBagConstraints();
        c.fill = GridBagConstraints.HORIZONTAL;
        c.weightx = 1;//Size
        outerPanel.add(innerPanel, c);

        this.add(outerPanel);
        this.setVisible(true);
    }

}

请注意，如果包含的窗口大小低于innerPanel的大小，则固定高度将不再适用。