Question

非常简单的问题：如何消除包含两个JCheckBox的两个单元格之间的垂直间隙？我用红色边框标记了图片中的间隙。

gap

以下是代码：

import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JPanel;

import net.miginfocom.swing.MigLayout;

public class Main {
    public static void main(String[] args) {
        JPanel somePanel = new JPanel();
        somePanel.setLayout(new MigLayout("insets 0, debug", "", ""));
        somePanel.add(new JCheckBox("first option"), "h 20!");
        somePanel.add(new JButton("click me"), "spany 2, h 40!, w 60%, wrap");
        somePanel.add(new JCheckBox("option two"), "h 20!");

        JFrame frame = new JFrame();
        frame.setContentPane(somePanel);
        frame.pack();
        frame.setVisible(true);
    }
}

Answer 1

如果只应在特定行/列之间应用最小间隙，则在行/列约束中定义最小间隙：

new MigLayout("insets 0, debug", "", "[]0[]"));

（想知道这对你不起作用？这里很好:)。

或在layoutContraints中，如果它们应该应用于所有行：

new MigLayout("insets 0, gapy 0, debug"));

BTW：布局“编码”应遵循与所有编码相同的规则，f.i。干:-)特别是，我的规则是不重复组件约束，如果你可以实现布局/行约束的目标。在示例中，除了跨越：

之外，您可以除去所有组件约束

somePanel.setLayout(new MigLayout("insets 0, debug, wrap 2", 
        "[][60%, fill]", "[20!, fill]0"));
somePanel.add(new JCheckBox("first option"));
somePanel.add(new JButton("click me"), "spany 2");
somePanel.add(new JCheckBox("option two"));

Answer 2

好的，我刚刚找到了一个使用对接的好解决方案：

import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JPanel;

import net.miginfocom.swing.MigLayout;

public class Main {
    public static void main(String[] args) {
        JPanel somePanel = new JPanel();
        somePanel.setLayout(new MigLayout("insets 0, debug", "", ""));
        somePanel.add(new JButton("click me"), "east");
        somePanel.add(new JCheckBox("first option"), "north");
        somePanel.add(new JCheckBox("option two"), "south");

        JFrame frame = new JFrame();
        frame.setContentPane(somePanel);
        frame.pack();
        frame.setVisible(true);
    }
}

但是，如果停靠不是一个选项，我该怎么办呢？

Answer 3

另一个解决方案是将单元格拆分为两个子单元，将复选框放在那里，然后应用组件间隙约束。

package com.zetcode;

import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;

import net.miginfocom.swing.MigLayout;

/*
Demonstrating component gaps in MigLayout manager.
Author: Jan Bodnar
Website: zetcode.com
 */
public class MigLayoutGapsEx extends JFrame {

    public MigLayoutGapsEx() {

        initUI();
    }

    private void initUI() {

        JCheckBox cb1 = new JCheckBox("First option");
        JCheckBox cb2 = new JCheckBox("Second option");

        JButton btn = new JButton("Click me");

        createLayout(cb1, cb2, btn);

        setTitle("MigLayout example");
        setLocationRelativeTo(null);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

    private void createLayout(JComponent... arg) {

        setLayout(new MigLayout());

        add(arg[0], "split 2, flowy");
        add(arg[1], "gapy 0");
        add(arg[2]);

        pack();
    }

    public static void main(String[] args) {

        SwingUtilities.invokeLater(() -> {
            MigLayoutGapsEx ex = new MigLayoutGapsEx();
            ex.setVisible(true);
        });
    }
}

以下是截图：

如何在MigLayout中删除两个单元格之间的垂直间隙？

3 个答案: