I was learning how to deal with JDesktopPane in order to use in future projects because I find this function very interesting. I tried calling a JInternalFrame of a button from within another JInternalFrame , but I did not succeed. I used the same code I used to call the first, but I did not succeed anyway.
public class FrameDes extends javax.swing.JFrame {
public FrameDes() {
initComponents();
}
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
desktop = new javax.swing.JDesktopPane();
jMenuBar2 = new javax.swing.JMenuBar();
jMenu3 = new javax.swing.JMenu();
jMenuItem1 = new javax.swing.JMenuItem();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
javax.swing.GroupLayout desktopLayout = new javax.swing.GroupLayout(desktop);
desktop.setLayout(desktopLayout);
desktopLayout.setHorizontalGroup(
desktopLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 852, Short.MAX_VALUE)
);
desktopLayout.setVerticalGroup(
desktopLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 428, Short.MAX_VALUE)
);
jMenu3.setText("File");
jMenuItem1.setText("ChamarPP");
jMenuItem1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jMenuItem1ActionPerformed(evt);
}
});
jMenu3.add(jMenuItem1);
jMenuBar2.add(jMenu3);
setJMenuBar(jMenuBar2);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(desktop)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(desktop, javax.swing.GroupLayout.Alignment.TRAILING)
);
setSize(new java.awt.Dimension(868, 488));
setLocationRelativeTo(null);
}// </editor-fold>
private void jMenuItem1ActionPerformed(java.awt.event.ActionEvent evt) {
PrimeiraPagina tela = new PrimeiraPagina();
tela.setVisible(true);
desktop.add(tela); // TODO add your handling code here:
}
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new FrameDes().setVisible(true);
}
});
}
// Variables declaration - do not modify
public javax.swing.JDesktopPane desktop;
private javax.swing.JMenu jMenu3;
private javax.swing.JMenuBar jMenuBar2;
private javax.swing.JMenuItem jMenuItem1;
// End of variables declaration
}
This first code is from the Home Screen where JDesktopPane is, the next pages should appear inside it.
public class PrimeiraPagina extends javax.swing.JInternalFrame {
public PrimeiraPagina() {
initComponents();
}
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jButton1 = new javax.swing.JButton();
setClosable(true);
setIconifiable(true);
setMaximizable(true);
jButton1.setText("Abri segunda Pagina");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(256, 256, 256)
.addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 150, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(275, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(137, 137, 137)
.addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 76, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(163, Short.MAX_VALUE))
);
setBounds(0, 0, 697, 406);
}// </editor-fold>
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
SegundaPagina tela = new SegundaPagina();
FrameDes desc = new FrameDes();
tela.setVisible(true);
System.out.println("mudar tela");
desc.desktop.add(tela);
}
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
// End of variables declaration
}
JInternalFrame , where there is a button that should call the second screen, but for some reason it does not appear.
public class SegundaPagina extends javax.swing.JInternalFrame {
public SegundaPagina() {
initComponents();
System.out.println("pagina mudada");
}
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jLabel1 = new javax.swing.JLabel();
setClosable(true);
setIconifiable(true);
setMaximizable(true);
jLabel1.setFont(new java.awt.Font("Tahoma", 0, 24)); // NOI18N
jLabel1.setText("Essa e a segunda pagina");
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(172, 172, 172)
.addComponent(jLabel1)
.addContainerGap(204, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(144, 144, 144)
.addComponent(jLabel1)
.addContainerGap(190, Short.MAX_VALUE))
);
setBounds(0, 0, 657, 393);
}// </editor-fold>
// Variables declaration - do not modify
private javax.swing.JLabel jLabel1;
// End of variables declaration
}
Finally the last screen, which should be displayed in JDesktopPane , but does not appear, note that I put println in it to check if it was at least called and yes it was, but the screen does not appear. What is the problem with the code?