Como usar efetivamente o cardlayout em java para mudar do painel usando botões dentro de vários construtores de painel
Eu sou novo no uso do cardlayout e tenho algumas perguntas sobre como implementá-lo. Primeiro, gostaria de saber a melhor maneira de implementar o layout do cartão para que eu possa alternar de painel para painel. Minha principal pergunta é como usar botões dentro dos construtores dos meus painéis para alternar de painel para painel. Comecei a trabalhar neste projeto hoje, para que você veja algum código que não está concluído ou que não faz sentido. Primeiro tentei fazer todas as minhas aulas estender o JFrame, mas isso levou a várias janelas indesejadas. Se eu puder obter algum tipo de exemplo de como usar efetivamente o layout do cartão e como alternar entre painéis usando os botões nos meus outros construtores de painéis. Minhas tentativas de usar o cardlayout funcionaram apenas para os botões que eu criei na minha classe de interface gráfica, mas esse não é o resultado que eu quero. Por favor, ajude se puder e obrigado antecipadamente.
Esta é a minha turma principal.
public class controller{
public static void main(String[] args){
new Gui();
}
}
Esta é a minha aula de GUI.
import java.awt.CardLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.Box;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
public class Gui extends JFrame{
homePage home = new homePage();
public JPanel loginPanel = new textEmailLog(),
registerPanel = new Register(),
homePanel = new homePage(), viewPanel = new emailView(),
loadPanel = new loadEmail(), contentPanel = new JPanel(new CardLayout());
CardLayout cardLayout = new CardLayout();
public Gui(){
super("Email Database Program");
setSize(700,700);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
contentPanel.setLayout(cardLayout);
contentPanel.add(loginPanel, "Login");
contentPanel.add(registerPanel, "Register");
contentPanel.add(homePanel, "Home");
contentPanel.add(viewPanel, "View");
contentPanel.add(loadPanel, "Load");
this.setContentPane(contentPanel);
cardLayout.show(contentPanel, "Login");
setVisible(true);
}
Classe Meu Painel de Login
import java.awt.CardLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.Box;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
//panel has been added
public class textEmailLog extends JPanel{
JPanel logGui = null;
JButton registerBut, logBut;
JTextField Login;
public textEmailLog(){
//default characteristics
setSize(700,700);
setName("Email Database");
//setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Labels for username and password
JLabel userLab = new JLabel("Username");
JLabel pwLab = new JLabel("Password");
//textfields for username and password
Login = new JTextField("", 15);
JPasswordField Password = new JPasswordField("", 15);
Password.setEchoChar('*');
//login button that confirms username and password
logBut = new JButton("Login");
logBut.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
//needs regex checks prior to logging in
if(e.getSource() == logBut){
/* Change the panel to the homepage
if(Login.getText().equals() && Password.getText().equals()){
}
*/
new homePage();
}
}
});
registerBut = new JButton("Register");
registerBut.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
if(e.getSource() == registerBut){
//Change the panel to the register panel
}
}
});
//Box layout for organization of jcomponents
Box verticalContainer = Box.createVerticalBox();
Box horizontalContainer = Box.createHorizontalBox();
Box mergerContainer = Box.createVerticalBox();
//add to panel
verticalContainer.add(Box.createVerticalStrut(300));//begin relative to the center
verticalContainer.add(userLab);//Login label and text
verticalContainer.add(Login);
verticalContainer.add(Box.createVerticalStrut(5));
verticalContainer.add(pwLab);//password label and text
verticalContainer.add(Password);
verticalContainer.add(Box.createVerticalStrut(5));
horizontalContainer.add(registerBut);//register button
horizontalContainer.add(Box.createHorizontalStrut(5));
horizontalContainer.add(logBut);//login button
//combines both the vertical and horizontal container
mergerContainer.add(verticalContainer);
mergerContainer.add(horizontalContainer);
add(mergerContainer);
//this.add(logGui);
setVisible(true);
}
}
Classe do painel Meu registro
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.Box;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
//No Panel addition
public class Register extends JPanel{
JButton submit, previous;
JLabel firstLab, lastLab, userLab, passwordLab, repassLab, address, emailAdd, errorLabel;
JTextField firstText, lastText, userText, addText, emailAddText;
JPasswordField passwordText, repassText;
public Register(){
setSize(700,700);
//setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//register values and their labels and textfields
firstLab = new JLabel("First Name: ");
firstText = new JTextField("", 25);
lastLab = new JLabel("Last Name: ");
lastText = new JTextField("", 40);
userLab = new JLabel("Username: ");
userText = new JTextField("", 25);
passwordLab = new JLabel("Password: ");
passwordText = new JPasswordField("", 25);
passwordText.setEchoChar('*');
repassLab = new JLabel("Confirm Password");
repassText = new JPasswordField("", 25);
repassText.setEchoChar('*');
address = new JLabel("Address: ");
addText = new JTextField("", 50);
emailAdd = new JLabel("Email Address: ");
emailAddText = new JTextField("", 50);
//error message for reigstration issues
errorLabel = new JLabel();
errorLabel.setForeground(Color.red);
submit = new JButton("Submit");
submit.addActionListener(new ActionListener(){
@SuppressWarnings("deprecation")
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
if(e.getSource() == submit){
//confirm with regex methods and if statements that have been created and need to be created
if(firstText.getText().length() == 0){
errorLabel.setText("*You have not entered a first name!");
}else
if(lastText.getText().length() == 0){
errorLabel.setText("*You have not entered a last name!");
}else
if(userText.getText().length() == 0){
errorLabel.setText("*You have not entered a username!");
}else
if(passwordText.toString().length() == 0){
errorLabel.setText("*You have not entered a Password!");
}else
if(repassText.toString().length() == 0){
errorLabel.setText("*You have not matched your password!");
}
if(addText.getText().length() == 0){
errorLabel.setText("*You have not entered an address!");
}else
if(emailAddText.getText().length() == 0){
errorLabel.setText("*You have not entered an Email address!");
}else
if(userText.getText().length() < 8){
errorLabel.setText("*Username is too short!");
}
else
if(!(passwordText.toString().matches(repassText.toString()))){
errorLabel.setText("Passwords do not match!");
}
else
if(!isValidEmailAddress(emailAddText.getText())){
errorLabel.setText("*Invalid Email!");
}
else
if(!isValidAddress(addText.getText())){
errorLabel.setText("*Invalid Address!");
}
}
}
});
//returns to the previous page
previous = new JButton("Previous Page");
previous.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
if(e.getSource() == previous){
//card.show(login panel);
}
}
});
Box verticalContainer = Box.createVerticalBox();
Box horizontalContainer = Box.createHorizontalBox();
Box mergerContainer = Box.createVerticalBox();
verticalContainer.add(Box.createVerticalStrut(150));
verticalContainer.add(firstLab);
verticalContainer.add(firstText);
verticalContainer.add(Box.createVerticalStrut(5));
verticalContainer.add(lastLab);
verticalContainer.add(lastText);
verticalContainer.add(Box.createVerticalStrut(5));
verticalContainer.add(userLab);
verticalContainer.add(userText);
verticalContainer.add(Box.createVerticalStrut(5));
verticalContainer.add(passwordLab);
verticalContainer.add(passwordText);
verticalContainer.add(Box.createVerticalStrut(5));
verticalContainer.add(repassLab);
verticalContainer.add(repassText);
verticalContainer.add(Box.createVerticalStrut(5));
verticalContainer.add(address);
verticalContainer.add(addText);
verticalContainer.add(Box.createVerticalStrut(5));
verticalContainer.add(emailAdd);
verticalContainer.add(emailAddText);
verticalContainer.add(Box.createVerticalStrut(5));
//horizontal
verticalContainer.add(Box.createVerticalStrut(5));
horizontalContainer.add(submit);
horizontalContainer.add(Box.createHorizontalStrut(5));
horizontalContainer.add(previous);
//merger
mergerContainer.add(verticalContainer);
mergerContainer.add(horizontalContainer);
add(mergerContainer);
setVisible(true);
}
//regex check for valid Email
public boolean isValidEmailAddress(String email){
java.util.regex.Pattern p = java.util.regex.Pattern.compile("[A-Za-z0-9._\\%-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}");
java.util.regex.Matcher m = p.matcher(email);
return m.matches();
}
//regex check for valid Address
public boolean isValidAddress(String address){
java.util.regex.Pattern p = java.util.regex.Pattern.compile("\\d{1,3}.?\\d{0,3}\\s[a-zA-Z]{2,30}\\s[a-zA-Z]{2,15}");
java.util.regex.Matcher m = p.matcher(address);
return m.matches();
}
}
Classe do painel da página inicial
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
//NO Panel Yet
@SuppressWarnings("serial")
public class homePage extends JPanel{
JButton uploadEmail, viewEmail;
public homePage(){
setSize(700,700);
uploadEmail = new JButton("Upload Your Email");
uploadEmail.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
if(e.getSource() == uploadEmail){
new loadEmail();
}
}
});
viewEmail = new JButton("View An Email");
viewEmail.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
if(e.getSource() == viewEmail){
new emailView();
}
}
});
add(uploadEmail);
add(viewEmail);
setVisible(true);
}
}
Painel My View Email
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.Box;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTable;
import javax.swing.JTextArea;
import javax.swing.JTextField;
public class emailView extends JPanel{
JPanel viewPanel;
JButton logout, delete, homepage;
JTable emailList;
//Cannot be edited or may be in a new panel
/*
JLabel fileLab, toLab, fromLab, subjectLab,topicLab, emailLab, notesLab, attachLab;
JTextField fileText, toText, fromText, subjectText, topicText;
JTextArea emailText, notesText, attachText;
*/
public emailView(){
setSize(700,700);
setVisible(true);
emailList = new JTable();
logout = new JButton("Logout");
logout.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
if(e.getSource() == logout){
new textEmailLog();
}
}
});
delete = new JButton("Delete");
delete.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
if(e.getSource() == delete){
}
}
});
homepage = new JButton("HomePage");
homepage.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
if(e.getSource() == homepage){
new homePage();
}
}
});
Box horizontalContainer = Box.createHorizontalBox();
Box verticalContainer = Box.createVerticalBox();
Box mergerContainer = Box.createVerticalBox();
horizontalContainer.add(logout);
horizontalContainer.add(Box.createHorizontalStrut(5));
horizontalContainer.add(homepage);
horizontalContainer.add(Box.createHorizontalStrut(5));
horizontalContainer.add(delete);
horizontalContainer.add(Box.createVerticalStrut(5));
verticalContainer.add(emailList);
mergerContainer.add(horizontalContainer);
mergerContainer.add(verticalContainer);
add(mergerContainer);
setVisible(true);
}
}
My Upload Email Panel
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.Box;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JTextField;
public class loadEmail extends JPanel{
JPanel loadPanel;
JLabel fileLab, toLab, fromLab, subjectLab, topicLab, emailLab, notesLab, attachLab;
JTextField fileText, toText, fromText, subjectText, topicText;
JTextArea emailText, notesText, attachText; //attachment text will be changed
JButton cancel, complete, enter;//enter may not be necessary
public loadEmail(){
setSize(700,700);
fileLab = new JLabel("Enter a new File: ");
fileText = new JTextField();
enter = new JButton("Enter");
enter.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
if(e.getSource() == enter){
//opens file directory window
}
}
});
toLab = new JLabel("To: ");
toText = new JTextField();
toText.setSize(5, 30);
fromLab = new JLabel("From: ");
fromText = new JTextField();
subjectLab = new JLabel("Subject: ");
subjectText = new JTextField();
topicLab = new JLabel("Topic: ");
topicText = new JTextField();
emailLab = new JLabel("Email Content: ");
emailText = new JTextArea();
notesLab = new JLabel("Comments: ");
notesText = new JTextArea();
attachLab = new JLabel("Attachments");
attachText = new JTextArea();
cancel = new JButton("Cancel");
cancel.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
if(e.getSource() == cancel){
//dispose page
}
}
});
complete = new JButton("Complete");
complete.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
if(e.getSource() == complete){
//store in database, prompt user for new email to enter in other wise return to homepage
}
}
});
Box verticalContainer = Box.createVerticalBox();
Box horizontalContainer = Box.createHorizontalBox();
Box mergerContainer = Box.createVerticalBox();
verticalContainer.add(fileLab);
verticalContainer.add(fileText);
verticalContainer.add(Box.createVerticalStrut(5));
verticalContainer.add(Box.createHorizontalStrut(50));
verticalContainer.add(enter);
verticalContainer.add(Box.createVerticalStrut(5));
verticalContainer.add(toLab);
verticalContainer.add(toText);
verticalContainer.add(Box.createVerticalStrut(5));
verticalContainer.add(fromLab);
verticalContainer.add(fromText);
verticalContainer.add(Box.createVerticalStrut(5));
verticalContainer.add(subjectLab);
verticalContainer.add(subjectText);
verticalContainer.add(Box.createVerticalStrut(5));
verticalContainer.add(topicLab);
verticalContainer.add(topicText);
verticalContainer.add(Box.createVerticalStrut(5));
verticalContainer.add(emailLab);
verticalContainer.add(emailText);
verticalContainer.add(Box.createVerticalStrut(5));
verticalContainer.add(notesLab);
verticalContainer.add(notesText);
verticalContainer.add(Box.createVerticalStrut(5));
verticalContainer.add(attachLab);
verticalContainer.add(attachText);
verticalContainer.add(Box.createVerticalStrut(5));
horizontalContainer.add(cancel);
, horizontalContainer.add(Box.createHorizontalStrut(5));
horizontalContainer.add(complete);
mergerContainer.add(verticalContainer);
mergerContainer.add(horizontalContainer);
add(mergerContainer);
setVisible(true);
}
}