java – 为什么这个GridBagLayout没有按计划出现？
发布时间：2020-12-15 04:24:02 所属栏目：Java 来源：网络整理
导读：我试图达到 Setting an arbitrary width in GridBagLayout所要求的最终结果. 为方便参考,这里是： 这是目前的结果： 按钮编号和行以1,1的形式显示,后跟为此单元格声明的列数(2). 如您所见,它从按钮1,1(3)开始,在它下面1,2(4)宽度相同,同时声明不同数量的列.
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我试图达到
Setting an arbitrary width in GridBagLayout所要求的最终结果.
为方便参考,这里是： 这是目前的结果： 按钮编号和行以1,1的形式显示,后跟为此单元格声明的列数(2). 如您所见,它从按钮1,1(3)开始,在它下面1,2(4)宽度相同,同时声明不同数量的列. 任何人都可以确定如何更正代码？ 目前的代码： import java.awt.*;
import javax.swing.*;
import javax.swing.border.EmptyBorder;
public class KeyBoardLayout {
private JComponent ui = null;
KeyBoardLayout() {
initUI();
}
public void initUI() {
if (ui!=null) return;
ui = new JPanel(new GridBagLayout());
ui.setBorder(new EmptyBorder(4,4,4));
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 0;
gbc.gridwidth = 3;
gbc.fill = GridBagConstraints.HORIZONTAL;
ui.add(new JButton("1,1 (3)"),gbc);
gbc.gridx = 3;
gbc.gridwidth = 2;
ui.add(new JButton("2,1 (2)"),gbc);
gbc.gridx = 5;
ui.add(new JButton("3,gbc);
gbc.gridx = 7;
ui.add(new JButton("4,gbc);
gbc.gridx = 9;
ui.add(new JButton("5,gbc);
gbc.gridx = 11;
ui.add(new JButton("6,gbc);
gbc.gridx = 13;
ui.add(new JButton("7,gbc);
gbc.gridx = 15;
gbc.gridwidth = 3;
ui.add(new JButton("8,gbc);
gbc.gridx = 18;
gbc.gridwidth = 4;
ui.add(new JButton("9,1 (4)"),gbc);
gbc.gridx = 0;
gbc.gridy = 1;
ui.add(new JButton("1,2 (4)"),gbc);
gbc.gridx = 4;
gbc.gridwidth = 2;
ui.add(new JButton("2,2 (2)"),gbc);
gbc.gridx = 6;
ui.add(new JButton("3,gbc);
gbc.gridx = 8;
ui.add(new JButton("4,gbc);
gbc.gridx = 10;
ui.add(new JButton("5,gbc);
gbc.gridx = 12;
ui.add(new JButton("6,gbc);
gbc.gridx = 14;
ui.add(new JButton("7,gbc);
gbc.gridx = 16;
ui.add(new JButton("8,gbc);
gbc.gridx = 0;
gbc.gridy = 2;
gbc.gridwidth = 5;
ui.add(new JButton("1,3 (5)"),gbc);
gbc.gridx = 5;
gbc.gridwidth = 2;
ui.add(new JButton("2,3 (2)"),gbc);
gbc.gridx = 7;
ui.add(new JButton("3,gbc);
gbc.gridx = 9;
ui.add(new JButton("4,gbc);
gbc.gridx = 11;
ui.add(new JButton("5,gbc);
gbc.gridx = 13;
ui.add(new JButton("6,gbc);
gbc.gridx = 15;
ui.add(new JButton("7,gbc);
gbc.gridx = 17;
ui.add(new JButton("8,gbc);
gbc.gridx = 19;
gbc.gridwidth = 3;
ui.add(new JButton("9,3 (3)"),gbc);
gbc.gridx = 0;
gbc.gridy = 3;
gbc.gridwidth = 3;
ui.add(new JButton("1,4 (3)"),gbc);
gbc.gridx = 3;
ui.add(new JButton("2,gbc);
gbc.gridx = 6;
gbc.gridwidth = 10;
ui.add(new JButton("3,4 (10)"),gbc);
gbc.gridx = 16;
gbc.gridwidth = 3;
ui.add(new JButton("4,gbc);
gbc.gridx = 19;
ui.add(new JButton("5,gbc);
}
public JComponent getUI() {
return ui;
}
public static void main(String[] args) {
Runnable r = new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception useDefault) {
}
KeyBoardLayout o = new KeyBoardLayout();
JFrame f = new JFrame("Keyboard Layout");
f.setDefaultCloSEOperation(JFrame.DISPOSE_ON_CLOSE);
f.setLocationByPlatform(true);
f.setContentPane(o.getUI());
f.pack();
f.setMinimumSize(f.getSize());
f.setVisible(true);
}
};
SwingUtilities.invokeLater(r);
}
}
解决方法
认为我得到了它的工作.我创建了一个包含22个组件的行,每个组件占用一列：
import java.awt.*;
import javax.swing.*;
import javax.swing.border.EmptyBorder;
public class KeyBoardLayout {
private JComponent ui = null;
KeyBoardLayout() {
initUI();
}
public void initUI() {
if (ui!=null) return;
ui = new JPanel(new GridBagLayout());
ui.setBorder(new EmptyBorder(4,4));
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridx = 0;
// gbc.gridy = 0;
gbc.gridy = 1;
gbc.gridwidth = 3;
gbc.fill = GridBagConstraints.HORIZONTAL;
ui.add(new JButton("1,gbc);
gbc.gridx = 0;
// gbc.gridy = 1;
gbc.gridy = 2;
ui.add(new JButton("1,gbc);
gbc.gridx = 0;
// gbc.gridy = 2;
gbc.gridy = 3;
gbc.gridwidth = 5;
ui.add(new JButton("1,gbc);
gbc.gridx = 0;
// gbc.gridy = 3;
gbc.gridy = 4;
gbc.gridwidth = 3;
ui.add(new JButton("1,gbc);
gbc.gridx = 0;
gbc.gridy = 4;
gbc.gridwidth = 1;
for (int i = 0; i < 22; i++)
{
gbc.gridx = i;
gbc.gridy = 4;
ui.add(new JButton());
// ui.add(Box.createHorizontalStrut(15));
}
}
public JComponent getUI() {
return ui;
}
public static void main(String[] args) {
Runnable r = new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception useDefault) {
}
KeyBoardLayout o = new KeyBoardLayout();
JFrame f = new JFrame("Keyboard Layout");
f.setDefaultCloSEOperation(JFrame.DISPOSE_ON_CLOSE);
f.setLocationByPlatform(true);
f.setContentPane(o.getUI());
f.pack();
f.setMinimumSize(f.getSize());
f.setVisible(true);
}
};
SwingUtilities.invokeLater(r);
}
}
当然你不希望按钮显示,所以你也可以使用不可见的组件. 现在,我有一个自己的问题.为什么按钮出现在第一行,即使我设置gridy = 4？ （编辑：李大同） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |