面板在Java中没有使用GridBagLayout正确调整大小

时间:2012-10-06 05:37:08

标签: java swing user-interface jpanel gridbaglayout

所以我使用GridBagLayout作为我的GUI,我遇到了一些问题,没有正确调整大小。在任何人建议替代布局之前,我很肯定我想使用GridBagLayout;我将有大量的组件,我想正确地布局它们,当前的代码/图像只显示我现在所拥有的。

无论如何,问题是它没有正确调整自身大小。我希望它在调整大小时保持当前的宽高比,但事实并非如此。某些面板在调整大小时会被赋予某种优先级,这样当我调整大小时,它会破坏纵横比。基本上,我有一些面板比另一个更大,但在调整大小后,它变得比另一个小,如下:

http://i.imgur.com/LWhHm.png

现在,我真正想要的是让他们保持已经呈现的比例。正如您所看到的,我希望GUI的聊天部分小于左侧面板中的任何一个,就像它最初一样。

以下是我现在制作的代码:

jpPack = new JPanel();
    jpCards = new JPanel();
    jpInfo = new JPanel();
    jpChat = new JPanel();


    jpPack.setBackground(Color.red);
    jpCards.setBackground(Color.blue);
    jpInfo.setBackground(Color.green);

    //create the Constraints and set some that will apply to each panel
    GridBagConstraints c = new GridBagConstraints();
    c.fill = GridBagConstraints.BOTH;

    //set the number of columns/rows to use
    c.gridwidth = 1;
    c.gridheight = 1;
    //set the x and y position
    c.gridx = 0;
    c.gridy = 0;
    //set the weight properties
    c.weightx = 1.0;
    c.weighty = 1.0;

    getContentPane().add(jpCards, c);

    //set the number of columns/rows to use
    c.gridwidth = 1;
    c.gridheight = 1;
    //set the x and y position
    c.gridx = 0;
    c.gridy = 1;
    //set the weight properties
    c.weightx = 1.0;
    c.weighty = 1.0;

    getContentPane().add(jpPack, c);

    //set the number of columns/rows to use
    c.gridwidth = 1;
    c.gridheight = 1;
    //set the x and y position
    c.gridx = 1;
    c.gridy = 0;
    //set the weight properties
    c.weightx = 0.2;
    c.weighty = 0.2;

    getContentPane().add(jpInfo, c);

    //set the number of columns/rows to use
    c.gridwidth = 1;
    c.gridheight = 1;
    //set the x and y position
    c.gridx = 1;
    c.gridy = 1;
    //set the weight properties
    c.weightx = 0.2;
    c.weighty = 0.2;

    getContentPane().add(jpChat, c);
    jpChat.setLayout(new GridLayout());
    jpChat.add(client.gui.getContentPane(), c);

    setVisible(true);

虽然我在这,但我也可以问我的其他问题。我想为整个GUI和聊天面板设置最小大小限制。对于第一个,我希望它禁止用户将其大小调整为小于某个x和某个y。对于后者,我希望它保持我所说的我想要的宽高比,然后在我达到两个右面板的最小值之后调整左侧面板的大小。也就是说,它会调整每个面板的大小,直到调整大小,然后继续调整整个GUI的大小,但只需调整左侧面板的大小,使右面板保持最小尺寸。

感谢您帮助我。这真是让我烦恼,我花了几个小时试图做到这一点,乱搞GridBagLayoutConstraints并没有得到任何地方。这是我得到的最好的。

1 个答案:

答案 0 :(得分:3)

我试着在你的问题上稍作一点,我的理由很简单,这可能会引起你的担忧。您在ChatPanel中使用的 JTextField ,在初始化时,您必须为其指定列,这可能会导致此类影响。从我制作上述代码的方式来看,这件事在任何意义上都没有给我任何奇怪的行为。虽然关于你的第二个问题,@ jackopatra,已经给出了一些见解。这是我使用的代码:

import java.awt.*;
import javax.swing.*;

public class ClientGrid
{
    private void displayGUI()
    {
        JFrame frame = new JFrame("Client Grid");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JPanel contentPane = new JPanel();
        contentPane.setLayout(new GridBagLayout());

        JPanel bluePanel = new JPanel();
        bluePanel.setOpaque(true);
        bluePanel.setBackground(Color.BLUE);

        JPanel greenPanel = new JPanel();
        greenPanel.setOpaque(true);
        greenPanel.setBackground(Color.GREEN);

        JPanel redPanel = new JPanel();
        redPanel.setOpaque(true);
        redPanel.setBackground(Color.RED);

        JPanel chatPanel = new JPanel();
        JTextField chatField = new JTextField();
        chatPanel.setLayout(new BorderLayout(5, 5));
        chatPanel.add(chatField, BorderLayout.PAGE_START);

        GridBagConstraints gbc = new GridBagConstraints();
        gbc.anchor = GridBagConstraints.FIRST_LINE_START;
        gbc.fill = GridBagConstraints.BOTH;
        gbc.gridx = 0;
        gbc.gridy = 0;
        gbc.weightx = 0.7;
        gbc.weighty = 0.3;

        contentPane.add(bluePanel, gbc);

        gbc.gridx = 1;
        gbc.weightx = 0.3;

        contentPane.add(greenPanel, gbc);

        gbc.gridx = 0;
        gbc.gridy = 1;
        gbc.weightx = 0.7;
        gbc.weighty = 0.7;

        contentPane.add(redPanel, gbc);

        gbc.gridx = 1;
        gbc.weightx = 0.3;

        contentPane.add(chatPanel, gbc);

        frame.setContentPane(contentPane);
        frame.pack();
        frame.setLocationByPlatform(true);
        frame.setVisible(true);
    }

    public static void main(String... args)
    {
        SwingUtilities.invokeLater(new Runnable()
        {
            @Override
            public void run()
            {
                new ClientGrid().displayGUI();
            }
        });
    }
}
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