![](/img/trans.png)
[英]How to add JSeparator between two JLabels in GridBagLayout
[英]how to add a TiltledBorder in a GridBagLayout?
我正在嘗試使用GridBagLayout
僅使用一個Container
與Swing制作UI!
我的問題是我想在界面中的一個標題( TitledBorder
)下重新組合一些JtextFields
和Jlabels
,有沒有一種方法可以直接在容器中添加邊框,還是應該創建另一個JPanel
來重新組合組件並添加孔面板到我的GridBagLayout
嗎?
嘗試這個 :
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
class SwingLayoutDemo {
private JFrame mainFrame;
private JLabel headerLabel;
private JLabel statusLabel;
private JPanel controlPanel;
private JLabel msglabel;
public SwingLayoutDemo(){
prepareGUI();
}
public static void main(String[] args){
SwingLayoutDemo swingLayoutDemo = new SwingLayoutDemo();
swingLayoutDemo.showGridBagLayoutDemo();
}
private void prepareGUI(){
mainFrame = new JFrame("Java SWING Examples");
mainFrame.setSize(400,400);
mainFrame.setLayout(new GridLayout(3, 1));
headerLabel = new JLabel("",JLabel.CENTER );
statusLabel = new JLabel("",JLabel.CENTER);
statusLabel.setSize(350,100);
mainFrame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent windowEvent){
System.exit(0);
}
});
controlPanel = new JPanel();
controlPanel.setBorder(new TitledBorder (
new LineBorder (Color.black, 5),
"Title String"));
controlPanel.add(new JLabel("TitledBorder using LineBorder"));
controlPanel.setLayout(new FlowLayout());
mainFrame.add(headerLabel);
mainFrame.add(controlPanel);
mainFrame.add(statusLabel);
mainFrame.setVisible(true);
}
private void showGridBagLayoutDemo(){
headerLabel.setText("Layout in action: GridBagLayout");
JPanel panel = new JPanel();
panel.setBackground(Color.darkGray);
panel.setSize(300,300);
GridBagLayout layout = new GridBagLayout();
panel.setLayout(layout);
GridBagConstraints gbc = new GridBagConstraints();
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridx = 0;
gbc.gridy = 0;
panel.add(new JButton("Button 1"),gbc);
gbc.gridx = 1;
gbc.gridy = 0;
panel.add(new JButton("Button 2"),gbc);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.ipady = 20;
gbc.gridx = 0;
gbc.gridy = 1;
panel.add(new JButton("Button 3"),gbc);
gbc.gridx = 1;
gbc.gridy = 1;
panel.add(new JButton("Button 4"),gbc);
gbc.gridx = 0;
gbc.gridy = 2;
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridwidth = 2;
panel.add(new JButton("Button 5"),gbc);
controlPanel.add(panel);
mainFrame.setVisible(true);
}
}
根據您提供的圖片,典型的解決方案是有2個單獨的面板,每個面板都有自己的TitledBorder,然后將這兩個面板都放在第三個外部面板上。
但是,可以通過用JLabel和JSeparator的組合替換TitledBorders在單個面板上創建類似的效果。
區別在於,字段的邏輯“組”現在僅由不圍繞整個組的標題定義。 有些人喜歡,其他人則不喜歡。
這是您的圖片示例,可為您提供想法:
import java.awt.*;
import javax.swing.*;
public class Test implements Runnable
{
private JTextField firstName;
private JTextField lastName;
private JTextField title;
private JTextField nickname;
private JComboBox format;
public static void main(String[] args)
{
SwingUtilities.invokeLater(new Test());
}
public Test()
{
firstName = new JTextField(20);
lastName = new JTextField(20);
title = new JTextField(20);
nickname = new JTextField(20);
format = new JComboBox();
}
public void run()
{
JFrame frame = new JFrame();
frame.getContentPane().add(createPanel());
frame.pack();
frame.setVisible(true);
}
private JPanel createPanel()
{
JPanel p = new JPanel(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 0;
gbc.insets = new Insets(4,4,4,4);
gbc.ipadx = 1;
gbc.ipady = 1;
gbc.anchor = GridBagConstraints.WEST;
JLabel nameHeader = new JLabel("Name:");
nameHeader.setForeground(Color.RED.darker());
p.add(nameHeader, gbc);
gbc.gridx = 1;
gbc.gridwidth = 3;
gbc.fill = GridBagConstraints.HORIZONTAL;
p.add(new JSeparator(JSeparator.HORIZONTAL), gbc);
gbc.gridx = 0;
gbc.gridy = 1;
gbc.gridwidth = 1;
gbc.fill = GridBagConstraints.NONE;
p.add(new JLabel("First Name"), gbc);
gbc.gridx = 1;
p.add(firstName, gbc);
gbc.gridx = 2;
p.add(new JLabel("Last Name"), gbc);
gbc.gridx = 3;
p.add(lastName, gbc);
gbc.gridx = 0;
gbc.gridy = 2;
p.add(new JLabel("Title"), gbc);
gbc.gridx = 1;
p.add(title, gbc);
gbc.gridx = 2;
p.add(new JLabel("Nickname"), gbc);
gbc.gridx = 3;
p.add(nickname, gbc);
gbc.gridx = 0;
gbc.gridy = 3;
p.add(new JLabel("Format"), gbc);
gbc.gridx = 1;
gbc.gridwidth = 3;
gbc.fill = GridBagConstraints.HORIZONTAL;
p.add(format, gbc);
return p;
}
}
您可以玩一些約束來完善它,但是您明白了。
這種方法的好處是,在“電子郵件”部分添加更多字段時,可以使它們與“名稱”部分中的字段對齊。 使用單獨的面板,這將更加困難(您可以為此使用一堆Box.createHorizontalStrut(...))。
這種方法的缺點是您現在擁有一個包含許多字段的大型面板,並且如果需要添加更多字段,可能難以維護。
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.