Question

我应该为我的软件工程类在java中创建一个GUI，但是中间两个摄像头的布局不是我想要的。现在它们是名为pCamera1和pCamera2的标签。我希望将标签更改为流动站的实时摄像机流。（如果有人知道如何做到这一点，我会很感激那些提示）。

我试图插入图片，但显然你需要10个代表才能做到这一点......所以我会尽力向你描述输出。基本上有两个按钮和一个标签，顶部标有Disconnect，connect，status。底部是两个箭头，用于改变未来的摄像机。中间是我的问题。有一个大的黄色盒子是一个面板，我把它染成黄色用于调试目的。盒子里面有两个红色的标签，它们将显示相机流。这些标签卡在中间，这就是我的问题。

基本上相机（或标签）没有达到我想要的水平。我将gridx和gridy设置为0，将camera1设置为0并不意味着标签应该位于黄色框的左上角，因为黄色框是面板？它没有。我还将gridwidth设置为2以尝试使其跨越两列。它没有。 gridx和gridy适用于其他标签和按钮，因此我不知道为什么它不起作用。我把ipady和ipadx设置为400，但这只是暂时的，因为一旦你调整它，它看起来很糟糕。好吧无论如何继承我的代码：

package rover.gui;
import javax.swing.JOptionPane;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
/**
 *
 * @author Matt
 */
public class RoverGUI {

    private JFrame f; //The window
    private JPanel p; //Stuff inside the window(Its a div essentially)
    private JPanel pCameras;
    private JPanel pPanCamera;
    private JLabel pCamera1;
    private JLabel pCamera2;

    private JButton connect;
    private JButton disConnect;
    private JButton cameraR;
    private JButton cameraL;

    private JLabel lab;
    private JButton temp;

    String connected = "Inactive";

    public RoverGUI() {
        gui();
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {

        new RoverGUI();
       /* String fn = JOptionPane.showInputDialog("Enter first number"); //Entered number is stored in string fn.

        JOptionPane.showMessageDialog(null, "The answer is " + fn, "The title",""); //p(position on screen, null = center, message, title bar)
        // TODO code application logic here*/
    }

    public void gui() {


        f = new JFrame("Rover");
        f.setVisible(true);
        f.setSize(600, 400);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //allows you to close the GUI.

        p = new JPanel(new GridBagLayout());
        pCameras = new JPanel(new GridBagLayout());
        pPanCamera = new JPanel(new GridBagLayout());
        //pCameras = new JPanel(new GridBagLayout());

        pCameras.setBackground(Color.YELLOW);
        //pCamera1.setBackground(Color.RED);
        //pCamera2.setBackground(Color.RED);

        GridBagConstraints c = new GridBagConstraints();//GridBagConstraint is a specific way of arranging the objects in java.
        c.fill = GridBagConstraints.HORIZONTAL;
        c.fill = GridBagConstraints.VERTICAL;

        connect = new JButton("Connect");
        disConnect = new JButton("Disconnect");
        cameraR = new JButton(">>");
        cameraL = new JButton("<<");
        lab = new JLabel("Status: " + connected);
        temp = new JButton("Camera feed goes here");
        pCamera1 = new JLabel("Camera 1");
        pCamera1.setBackground(Color.red);
        pCamera1.setOpaque(true);
        pCamera2= new JLabel("Camera 2");
        pCamera2.setBackground(Color.red);
        pCamera2.setOpaque(true);


        connect.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                //JOptionPane.showMessageDialog(null, "connect");
                connected = "Active";
                lab.setText("Status: " + connected);
            }
        });

        disConnect.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                //JOptionPane.showMessageDialog(null, "disConnect");
                connected = "Inactive";
                lab.setText("Status: " + connected);

            }
        });

        cameraR.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                JOptionPane.showMessageDialog(null, "Right");
            }
        });

        cameraL.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                JOptionPane.showMessageDialog(null, "Left");
            }
        });



        //Add button & label to panel; add panel to frame.
        c.insets = new Insets(10,10,10,10);//makes buttons have margins(top, left, right, bottom)

        c.gridx = 0; //Set the x axis for the object
        c.gridy = 0; //Set the y axis for the object
        p.add(disConnect, c);

        c.gridx = 1; //Set the x axis for the object
        c.gridy = 0; //Set the y axis for the object
        p.add(connect, c);

        c.gridx = 0; //Set the x axis for the object
        c.gridy = 0; //Set the y axis for the object
        pPanCamera.add(cameraL, c);

        c.gridx = 1; //Set the x axis for the object
        c.gridy = 0; //Set the y axis for the object
        pPanCamera.add(cameraR, c);

        c.gridx = 2;
        c.gridy = 0;
        p.add(lab, c);

        //Problem starts here
        c.gridx = 0;
        c.gridy = 0;
        c.gridwidth = 2;

        pCameras.add(pCamera1, c);

        c.gridx = 2;
        c.gridy = 0;
        c.gridwidth = 2;

        pCameras.add(pCamera2, c);
        //Problem ends here

        f.add(p,BorderLayout.NORTH);
        f.add(pPanCamera, BorderLayout.SOUTH);
        //f.add(pCamera1, BorderLayout.WEST);
        //f.add(pCamera2, BorderLayout.EAST);
        f.add(pCameras, BorderLayout.CENTER);


    }

}

感谢您的帮助！

Answer 1

基本上，您需要指定如何将剩余空间分配给组件以及组件应如何填充该空间，请尝试将以下内容添加到两个相机的约束中...

c.weightx = 1;
c.weighty = 1;
c.fill = GridBagConstraints.BOTH;

GridBagLayout无法正确定位

1 个答案: