如何摆脱 Java 中 MigLayout 的自动插入？答案

【问题标题】：How do I get rid of the automatic inset on MigLayout in Java?如何摆脱 Java 中 MigLayout 的自动插入？
【发布时间】：2016-04-12 07:47:18
【问题描述】：

我正在使用 MigLayout 创建 UI。我的问题是，我如何摆脱屏幕上的灰色/白色插图并使小程序的整个背景变成深棕色？ (53, 9, 9)

我附上了一张可以更好地解释我在下面遇到的问题的照片。

Image of the Issue

import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.IOException;
import net.miginfocom.swing.MigLayout;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Clip;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.UnsupportedAudioFileException;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class Casino extends JFrame implements ActionListener {
private JButton start, settings, scenario, music;

//mainUI, startUI, settingsUI, scenarioUI, blackjackUI, oddorevenUI, tcmUI, overorunderUI, slotsUI;

/**
 * Constructor method
 */

public Casino(){

    JPanel mainUI, startUI, settingsUI, scenarioUI, blackjackUI, oddorevenUI, tcmUI, overorunderUI, slotsUI;
    JPanel menus = new JPanel(new MigLayout());


    MigLayout mig = new MigLayout();
    mainUI = new JPanel(new MigLayout());
    buildMainUI(mainUI);

    menus.add(mainUI);
    add(menus);



    mig.layoutContainer(mainUI);



    //Audio implementation Method 2(not mine)
    Clip clip = null;
    try {
        clip = AudioSystem.getClip();
    } catch (LineUnavailableException e1) {

        e1.printStackTrace();
    }
    AudioInputStream inputStream = null;
    try {
        inputStream = AudioSystem.getAudioInputStream(new File("57.wav"));
    } catch (UnsupportedAudioFileException e) {

        e.printStackTrace();
    } catch (IOException e) {

        e.printStackTrace();
    }
    try {
        clip.open(inputStream);
    } catch (LineUnavailableException e) {

        e.printStackTrace();
    } catch (IOException e) {

        e.printStackTrace();
    }
    clip.loop(Clip.LOOP_CONTINUOUSLY);
    try {
        Thread.sleep(10000);
    } catch (InterruptedException e) {

        e.printStackTrace();
    } // looping as long as this thread is alive

    /*  Audio code taken from
     * http://stackoverflow.com/questions/8979914/audio-clip-wont-loop-continuously
     */
    setSize(780, 700);
    setResizable(false);
    setLayout(mig);
    setTitle("White Lily Casino");
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    setVisible(true);
}

public void actionPerformed(ActionEvent e){

}

public void buildMainUI(JPanel mainUI){

    getContentPane().add(mainUI);
    mainUI.setBackground(new Color(53, 9, 9));


    //Background items
    JLabel title = new JLabel(new ImageIcon("title.png"));
    mainUI.add(title, "dock north");

    JLabel border = new JLabel(new ImageIcon("mainscreenborder.png"));
    mainUI.add(border, "pos 0px 500px");

    settings = new JButton();
    ImageIcon s = new ImageIcon("settings-button.png");
    settings.setBackground(new Color(53, 9, 9));
    settings.setIcon(s);
    mainUI.add(settings, "pos 300 200");

    music = new JButton();
    ImageIcon m = new ImageIcon("music-button.png");
    music.setBackground(new Color(53, 9, 9));
    music.setIcon(m);
    mainUI.add(music, "pos 300 263");

    scenario = new JButton();
    ImageIcon sc = new ImageIcon("scenario-button.png");
    scenario.setBackground(new Color(53, 9, 9));
    scenario.setIcon(sc);
    mainUI.add(scenario, "pos 300 326");

    start = new JButton();
    ImageIcon st = new ImageIcon("start-button.png");
    start.setBounds(320, 404, 122, 63);
    start.setBackground(new Color(53, 9, 9));
    start.setIcon(st);
    mainUI.add(start, "pos 300 389");
}

public void buildStartUI(JPanel startUI){

}

public void buildSettingsUI(JPanel settingsUI){

}

public void buildScenarioUI(JPanel scenarioUI){

}

public void buildBlackjackUI(JPanel blackjackUI){

}

public void buildOddOrEvenUI(JPanel oddorevenUIUI){

}

public void buildTCMUI(JPanel tcmUI){

}

public void buildOverOrUnderUI(JPanel overorunderUI){

}

public void buildSlotsUI(JPanel slotsUI){


}


public static void main(String[] args) {
    // TODO Auto-generated method stub

    Casino wlc = new Casino();

}

}

【问题讨论】：

我附上了一张可以更好地解释我在下面遇到的问题的照片。Runnable Example 可以更好地解释它。请记住：“一张图片包含超过 100 个单词，但您的代码包含超过 100 个图片”:)
添加了一个可运行的例子
如果您能够摆脱插图并在 Windows、X11 和 OS X 上取得良好的效果，我很想知道它是如何完成的 :)
出现这些“插图”是因为您使用的是JButtonss，并且这种组件默认有边框。
当我说 inset 时，我指的是整个 JPanel 边界周围的灰色部分

标签： java swing user-interface jpanel miglayout

【解决方案1】：

只需创建一个面板并将其设置为 JFrame 的内容面板。

您的示例非常复杂且不可运行，因为它引用了图像和声音文件...这是一个简单的示例，可以让您更好地了解如何实现您想要的：

import java.awt.Color;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import net.miginfocom.swing.MigLayout;

public class Casino extends JFrame
{

    public Casino()
    {
        JPanel mainPanel = new JPanel (new MigLayout());
        buildMainUI(mainPanel);
        setContentPane(mainPanel);
        setSize(780, 700);
        setResizable(false);
        setTitle("White Lily Casino");
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setVisible(true);
    }

    public void buildMainUI(JPanel mainUI)
    {
        mainUI.setBackground(new Color(53, 9, 9));

        // Background items
        JLabel title = new JLabel("Title");
        title.setForeground(Color.CYAN);
        mainUI.add(title, "dock north");
    }

    public static void main(String[] args)
    {
        Casino wlc = new Casino();
    }
}

附：由于您使用的是 miglayout，因此有比使用绝对坐标更好的方法来定位按钮。查看cheatsheet 或quickstart guide。

【讨论】：

【解决方案2】：

只需在布局约束中将 insets 设置为 0，例如 "insets 0"。

【讨论】：