MigLayout特定布局

Question

我一直在尝试用MigLayout做一个由3个面板组成的布局，一个在右边，一个在顶部，还有一个填充了其余的空间。

如下所示：

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Answer 1

有几种可能的解决方案。我提供两个例子。在这两个示例中，我们还设置了面板的首选宽度和高度。通常情况下，面板会从他们的孩子那里获得他们的首选。

第一个布局是使用dock约束完成的。

package com.zetcode;

import java.awt.EventQueue;
import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JPanel;
import net.miginfocom.swing.MigLayout;


public class MigLayoutThreePanels extends JFrame {

    public MigLayoutThreePanels() {

        initUI();

        setTitle("Three panels");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLocationRelativeTo(null);
    }

    private void initUI() {

        setLayout(new MigLayout());

        JPanel pnl1 = new JPanel();
        pnl1.setBorder(BorderFactory.createEtchedBorder());
        JPanel pnl2 = new JPanel();
        pnl2.setBorder(BorderFactory.createEtchedBorder());
        JPanel pnl3 = new JPanel();
        pnl3.setBorder(BorderFactory.createEtchedBorder());


        add(pnl2, "w 40, dock east");
        add(pnl1, "h 40, dock north");
        add(pnl3, "w 250, h 200, dock center");

        pack();
    }


    public static void main(String[] args) {

        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                MigLayoutThreePanels ex = new MigLayoutThreePanels();
                ex.setVisible(true);
            }
        });
    }
}

这三个面板停靠在东部、北部和中心。可以使用间隙约束创建嵌板之间的其他空间。

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在第二个示例中，我们使用了利用网格结构。

package com.zetcode;

import java.awt.EventQueue;
import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JPanel;
import net.miginfocom.swing.MigLayout;


public class MigLayoutThreePanels2 extends JFrame {

    public MigLayoutThreePanels2() {

        initUI();

        setTitle("Three panels");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLocationRelativeTo(null);
    }

    private void initUI() {

        setLayout(new MigLayout("gap 3 3"));

        JPanel pnl1 = new JPanel();
        pnl1.setBorder(BorderFactory.createEtchedBorder());
        JPanel pnl2 = new JPanel();
        pnl2.setBorder(BorderFactory.createEtchedBorder());
        JPanel pnl3 = new JPanel();
        pnl3.setBorder(BorderFactory.createEtchedBorder());

        add(pnl1, "h 40, growx");
        add(pnl2, "w 40, spany 2, growy, wrap");
        add(pnl3, "w 250, h 200, grow, push");

        pack();
    }


    public static void main(String[] args) {

        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                MigLayoutThreePanels2 ex = new MigLayoutThreePanels2();
                ex.setVisible(true);
            }
        });
    }
}

在本例中，我们还在单元格和容器插图之间设置了一些间隙。

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