将所有java swing gui放在一个类中是正常的吗？ [英] Is it normal to have all java swing gui in one class?
问题描述
我刚刚开始使用摇摆开发并遇到问题。将整个GUI放入单个类是否正常？我正在构建的应用程序有一个单独的JFrame，它显示多个不同的页面。例如，如果用户点击按钮，则他们将被带到具有不同布局的完全不同的页面。我已经配置了卡片布局，到目前为止我构建的一张卡片使用的是GridBag布局。
我所拥有的问题是
1.每个页面是否应该有自己的类？
2.如果他们如何在运行卡片布局的GUI控制器和各个页面之间进行通信？
3.或者我应该将所有GUI放入GUI控制器让它像那样运行。
以下是我到目前为止所拥有的代码，我是新手，并且真的想要擅长这一点，所以如果你发现我错过的任何重大问题请随时指出它们。
单页代码：
public class HomePage扩展JPanel实现ActionListener {
private GridBagLayout gl;
私人JPanel frm;
JButton newPersonalContact;
首页（）{
frm = new JPanel（）;
gl = new GridBagLayout（）;
GridBagConstraints gbc = new GridBagConstraints（）;
frm.setLayout（gl）;
newPersonalContact = new JButton（New Personal Contact）;
JButton newBusinessContact = new JButton（New Business Contact）;
JButton showAllContacts = new JButton（Show All Contacts）;
JButton saveAndQuit = new JButton（Save and Quit）;
JPanel top = new JPanel（）;
top.setBackground（new Color（218,165,32））;
top.add（新JLabel（西部管理者大学礼物：））;
JPanel middle = new JPanel（）;
middle.setBackground（new Color（43,47,85））;
GridLayout ge = new GridLayout（4,4）;
middle.setLayout（ge）;
middle.add（new JLabel（））;
middle.add（new JLabel（））;
middle.add（new JLabel（））;
middle.add（new JLabel（））;
middle.add（new JLabel（））;
middle.add（newPersonalContact）;
middle.add（newBusinessContact）;
middle.add（new JLabel（））;
middle.add（new JLabel（））;
middle.add（showAllContacts）;
middle.add（saveAndQuit）;
middle.add（new JLabel（））; middle.add（new JLabel（））;
middle.add（new JLabel（））;
middle.add（new JLabel（））;
JPanel bottom = new JPanel（）;
bottom.setBackground（new Color（218,165,32））;
gbc.fill = GridBagConstraints.BOTH;
gbc.weightx = 1.0;
gbc.weighty = 2.0;
gbc.gridx = 0;
gbc.gridy = 0;
frm.add（top，gbc）;
gbc.weighty = 6.0;
gbc.gridx = 0;
gbc.gridy = 1;
frm.add（middle，gbc）;
gbc.weighty = 1.0;
gbc.gridx = 0;
gbc.gridy = 2;
frm.add（bottom，gbc）;
newPersonalContact.addActionListener（this）;
newBusinessContact.addActionListener（this）;
showAllContacts.addActionListener（this）;
saveAndQuit.addActionListener（this）;
}
public void actionPerformed（ActionEvent ae）{
if（ae.getSource（）== newPersonalContact）{
//这里有什么？
}
}
public JPanel getFrame（）{
return frm;
}
}
GUI控制器的代码：
public class GUIController {
JFrame frm;
CardLayout cl;
容器窗格;
GUIController（）{
frm = new JFrame（）;
frm.setSize（800,600）;
frm.setDefaultCloseOperation（JFrame.EXIT_ON_CLOSE）;
JPanel card2 = new JPanel（）;
card2.setBackground（Color.black）;
JPanel cards = new JPanel（new CardLayout（））;
cards.add（new HomePage（）。getFrame（），Home）;
cards.add（card2，New Personal Contact）;
pane = frm.getContentPane（）;
pane.add（cards，BorderLayout.CENTER）;
}
public void start（）{
this.frm.setVisible（true）;
}
public void showCard（）{
cl.show（pane，Card2）;
}
}
虽然这是对于学校项目，GUI界面不仅仅是我有兴趣学习的东西。感谢您的帮助。
不，我不建议将所有GUI代码放在课堂上 - 至少如果它得到了在这种情况下使用Mediator模式：
- 将子组件放入JPanel的自定义子类
- 该子类侦听其子项的事件并更新其他子项
- 根据需要触发自己的自定义事件
另请注意：如果您要学习GUI编程并且没有特定要求使用Swing，请考虑使用更新版本GUI工具包 JavaFX 。
I am just starting out with swing development and am having an issue. Is it normal to put the entire GUI into a single class? The application that I am building has one single JFrame that displays multiple different "pages". For example if the user clicks on a button they are taken to an entirely different page with a different layout. I've configured a Card Layout, and the one card that I have build so far uses the GridBag layout.
The question that I have, then, is
1. whether or not each page should have its own class?
2. If they do how do I communicate between the GUI controller which runs the card layout and the individual pages?
3. Or should I just put all of the GUI into the GUI controller and let it run like that.
Below is the code for what I have so far, I am new to this and really would like to get good at it so if you spot any major issues that I missed please feel free to point them out.
Code for the individual page:
public class HomePage extends JPanel implements ActionListener{
private GridBagLayout gl;
private JPanel frm;
JButton newPersonalContact;
HomePage(){
frm=new JPanel();
gl=new GridBagLayout();
GridBagConstraints gbc=new GridBagConstraints();
frm.setLayout(gl);
newPersonalContact=new JButton("New Personal Contact");
JButton newBusinessContact=new JButton("New Business Contact");
JButton showAllContacts=new JButton("Show All Contacts");
JButton saveAndQuit=new JButton("Save and Quit");
JPanel top=new JPanel();
top.setBackground(new Color(218,165,32));
top.add(new JLabel("Western Governers University Presents:"));
JPanel middle=new JPanel();
middle.setBackground(new Color(43,37,85));
GridLayout ge=new GridLayout(4,4);
middle.setLayout(ge);
middle.add(new JLabel(""));
middle.add(new JLabel(""));
middle.add(new JLabel(""));
middle.add(new JLabel(""));
middle.add(new JLabel(""));
middle.add(newPersonalContact);
middle.add(newBusinessContact);
middle.add(new JLabel(""));
middle.add(new JLabel(""));
middle.add(showAllContacts);
middle.add(saveAndQuit);
middle.add(new JLabel(""));middle.add(new JLabel(""));
middle.add(new JLabel(""));
middle.add(new JLabel(""));
JPanel bottom=new JPanel();
bottom.setBackground(new Color(218,165,32));
gbc.fill=GridBagConstraints.BOTH;
gbc.weightx=1.0;
gbc.weighty=2.0;
gbc.gridx=0;
gbc.gridy=0;
frm.add(top,gbc);
gbc.weighty=6.0;
gbc.gridx=0;
gbc.gridy=1;
frm.add(middle,gbc);
gbc.weighty=1.0;
gbc.gridx=0;
gbc.gridy=2;
frm.add(bottom,gbc);
newPersonalContact.addActionListener(this);
newBusinessContact.addActionListener(this);
showAllContacts.addActionListener(this);
saveAndQuit.addActionListener(this);
}
public void actionPerformed(ActionEvent ae){
if (ae.getSource()==newPersonalContact){
//What goes here?
}
}
public JPanel getFrame(){
return frm;
}
}
code for the GUI controller:
public class GUIController {
JFrame frm;
CardLayout cl;
Container pane;
GUIController(){
frm=new JFrame();
frm.setSize(800,600);
frm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel card2=new JPanel();
card2.setBackground(Color.black);
JPanel cards=new JPanel(new CardLayout());
cards.add(new HomePage().getFrame(), "Home");
cards.add(card2,"New Personal Contact");
pane=frm.getContentPane();
pane.add(cards,BorderLayout.CENTER);
}
public void start(){
this.frm.setVisible(true);
}
public void showCard(){
cl.show(pane, "Card2");
}
}
While this is for a school Project, the GUI interface is not required just something I am interested in learning. Thanks for any help.
No, I don't recommend to put all GUI code in class - at least if it gets big and does several things.
In that case use the Mediator pattern:
- put subcomponents to custom subclasses of JPanel
- that subclass listens for events of its children and updates other children
- fires own custom events if needed
Also note: If you're about to learn GUI programming and don't have a specific requirement to use Swing, consider to use the newer GUI toolkit JavaFX.
这篇关于将所有java swing gui放在一个类中是正常的吗？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
