java - JPanel 之间的间隙

Question

我的 JPanels 有问题。我有 1 个主面板(GridBagLayout)，里面有 4 个面板。我不想再看到中间有这个 *** 间隙了，呜呜!当我在面板上使用填充时，它可以工作，但有一个问题，左侧的更多面板无法水平调整大小。因此，我将左侧的面板设置为垂直填充，将右侧的面板设置为两者都填充。它工作正常，因为左侧没有调整大小，但中间仍然有这个间隙，当我调整框架大小时，这个间隙的大小从小到大改变；/

屏幕:http://i44.tinypic.com/smr42a.png

编辑:当所有面板都在某些 Jpanel 中时，你能修复它吗(我正在使用 netbeans 设计模式，它强制添加主面板)

import java.awt.Color;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;

import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class Example extends JFrame {

public static void main(String[] args) {
    final JFrame f = new JFrame();
    JPanel p0 = new JPanel();

    JPanel p1 = new JPanel();
    JPanel p2 = new JPanel();
    JPanel p3 = new JPanel();
    JPanel p4 = new JPanel();


    p1.setBorder(BorderFactory.createTitledBorder("panel 1"));
    p2.setBorder(BorderFactory.createTitledBorder("panel 2"));
    p3.setBorder(BorderFactory.createTitledBorder("panel 3"));
    p4.setBorder(BorderFactory.createTitledBorder("panel 4"));
    p1.setBackground(Color.RED);
    p2.setBackground(Color.GREEN);
    p3.setBackground(Color.BLUE);
    p4.setBackground(Color.CYAN);


    f.getContentPane().setLayout(new GridBagLayout());
    GridBagConstraints c = new GridBagConstraints();
    c.gridx = 0;
    c.gridy = 0;
    c.ipadx = 50;
    p0.add(p1,c);

    c.gridy = 1;
    c.fill = GridBagConstraints.VERTICAL;
    c.weighty = 1;
    p0.add(p2,c);

    c.gridx = 1;
    c.gridy = 0;
    c.ipadx = 0;
    c.fill = GridBagConstraints.HORIZONTAL;
    c.weighty = 0;
    c.weightx = 1;
    p0.add(p3,c);

    c.fill = GridBagConstraints.BOTH;
    c.weighty = 1;
    c.gridy = 1;
    p0.add(p4,c);

    f.add(p0);
    f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
    f.pack();
    f.setVisible(true);
}

}

Answer 1

尝试下一个示例。它没有任何间隙/插图:

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;

import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class Example extends JFrame {

    public static void main(String[] args) {
        final JFrame f = new JFrame();
        JPanel p0 = new JPanel(new GridBagLayout());

        JPanel p1 = new JPanel();
        JPanel p2 = new JPanel();
        JPanel p3 = new JPanel();
        JPanel p4 = new JPanel();

        p1.setBorder(BorderFactory.createTitledBorder("panel 1"));
        p2.setBorder(BorderFactory.createTitledBorder("panel 2"));
        p3.setBorder(BorderFactory.createTitledBorder("panel 3"));
        p4.setBorder(BorderFactory.createTitledBorder("panel 4"));
        p1.setBackground(Color.RED);
        p2.setBackground(Color.GREEN);
        p3.setBackground(Color.BLUE);
        p4.setBackground(Color.CYAN);

        GridBagConstraints c = new GridBagConstraints();
        c.gridx = 0;
        c.gridy = 0;
        c.ipadx = 50;
        p0.add(p1, c);

        c.gridy = 1;
        c.fill = GridBagConstraints.VERTICAL;
        c.weighty = 1;
        p0.add(p2, c);

        c.gridx = 1;
        c.gridy = 0;
        c.ipadx = 0;
        c.fill = GridBagConstraints.HORIZONTAL;
        c.weighty = 0;
        c.weightx = 1;
        p0.add(p3, c);

        c.fill = GridBagConstraints.BOTH;
        c.weighty = 1;
        c.gridy = 1;
        p0.add(p4, c);

        f.getContentPane().add(p0,BorderLayout.CENTER);
        f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        f.pack();
        f.setVisible(true);
    }

}

看起来像:

panel1 具有固定大小。

panel2 仅垂直调整大小。

panel3 仅水平调整大小。

panel4 垂直和水平调整大小。

编辑:不要将 LayoutManager 设置为 contentPane，使用默认值(BorderLayout)。还将 GridBagLaout 设置为您的 p0，一切都会正常工作。我建议您阅读 LayoutManager's .