I have problem with pack function, when using Card Layout. I created 1 JFrame which include JPanel(in cardlayout) and this JPanel contains two JPanels. ... so when I run my program the windows is resized to biggest JPanel in program and i cant dynamicly resize it.
now screens: my background1(smaller background) class when i run program only with this panel has width like 200 http://i41.tinypic.com/scfi88.jpg when i run my program with added background2 the background gets width of it so it looks for like 400 http://i41.tinypic.com/2lu742x.jpg so it gets width of my background2 panel
In both backgrounds classes i have buttons to return to preview background, but it never resize. I lready used revalidate and repaint functions on thoose action buttons. code: main class and background1 and background2(background codes are big because they are generated by netbeans design mode(they are just few empty components):
public class main extends javax.swing.JFrame {
private JPanel mainPanel;
public main() {
mainPanel = new JPanel(new CardLayout());
add(mainPanel);
Background2 card1 = new Background2(mainPanel);
Background1 card2 = new Background1(mainPanel);
mainPanel.add(card1,"card1");
mainPanel.add(card2,"card2");
CardLayout cl = (CardLayout) (mainPanel.getLayout());
cl.show(mainPanel, "card1");
mainPanel.revalidate();
mainPanel.repaint();
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
pack();
}
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new main().setVisible(true);
}
});
}
}
public class Background1 extends javax.swing.JPanel {
private JPanel mainPanel;
/**
* Creates new form HomePanel
*/
public Background1(JPanel panel) {
mainPanel=panel;
initComponents();
}
public JPanel getMainPanel() {
return mainPanel;
}
public void setMainPanel(JPanel mainPanel) {
this.mainPanel = mainPanel;
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jScrollPane1 = new javax.swing.JScrollPane();
jTable1 = new javax.swing.JTable();
left_Panel = new javax.swing.JPanel();
zakladka1_Button = new javax.swing.JButton();
background_Panel = new javax.swing.JPanel();
jScrollPane2 = new javax.swing.JScrollPane();
jTable2 = new javax.swing.JTable();
powrot_Button = new javax.swing.JButton();
jLabel1 = new javax.swing.JLabel();
jScrollPane3 = new javax.swing.JScrollPane();
jTable3 = new javax.swing.JTable();
jTable1.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
{null, null, null, null},
{null, null, null, null},
{null, null, null, null},
{null, null, null, null}
},
new String [] {
"Title 1", "Title 2", "Title 3", "Title 4"
}
));
jScrollPane1.setViewportView(jTable1);
zakladka1_Button.setText("button");
zakladka1_Button.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
zakladka1_ButtonActionPerformed(evt);
}
});
javax.swing.GroupLayout left_PanelLayout = new javax.swing.GroupLayout(left_Panel);
left_Panel.setLayout(left_PanelLayout);
left_PanelLayout.setHorizontalGroup(
left_PanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(left_PanelLayout.createSequentialGroup()
.addContainerGap()
.addComponent(zakladka1_Button)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
left_PanelLayout.setVerticalGroup(
left_PanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(left_PanelLayout.createSequentialGroup()
.addGap(5, 5, 5)
.addComponent(zakladka1_Button)
.addGap(433, 433, 433))
);
jTable2.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
{null, null, null, null},
{null, null, null, null},
{null, null, null, null},
{null, null, null, null}
},
new String [] {
"Title 1", "Title 2", "Title 3", "Title 4"
}
));
jScrollPane2.setViewportView(jTable2);
javax.swing.GroupLayout background_PanelLayout = new javax.swing.GroupLayout(background_Panel);
background_Panel.setLayout(background_PanelLayout);
background_PanelLayout.setHorizontalGroup(
background_PanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(background_PanelLayout.createSequentialGroup()
.addGap(32, 32, 32)
.addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 452, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(83, Short.MAX_VALUE))
);
background_PanelLayout.setVerticalGroup(
background_PanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, background_PanelLayout.createSequentialGroup()
.addContainerGap(14, Short.MAX_VALUE)
.addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 319, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap())
);
powrot_Button.setText("<--");
powrot_Button.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
powrot_ButtonActionPerformed(evt);
}
});
jLabel1.setText("jLabel1");
jTable3.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
{null, null, null, null},
{null, null, null, null},
{null, null, null, null},
{null, null, null, null}
},
new String [] {
"Title 1", "Title 2", "Title 3", "Title 4"
}
));
jScrollPane3.setViewportView(jTable3);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
this.setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addGroup(javax.swing.GroupLayout.Alignment.LEADING, layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(left_Panel, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGroup(layout.createSequentialGroup()
.addGap(21, 21, 21)
.addComponent(powrot_Button)))
.addGap(18, 18, 18)
.addComponent(background_Panel, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jScrollPane3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jLabel1)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(18, 18, 18)
.addComponent(powrot_Button, javax.swing.GroupLayout.PREFERRED_SIZE, 43, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(left_Panel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addGroup(layout.createSequentialGroup()
.addComponent(background_Panel, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(0, 0, Short.MAX_VALUE))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addComponent(jLabel1)
.addGap(115, 115, 115))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addComponent(jScrollPane3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(42, 42, 42))))
);
}// </editor-fold>
private void powrot_ButtonActionPerformed(java.awt.event.ActionEvent evt) {
CardLayout cl = (CardLayout) (mainPanel.getLayout());
cl.show(mainPanel, "card1");
mainPanel.revalidate();
mainPanel.repaint();
}
private void zakladka1_ButtonActionPerformed(java.awt.event.ActionEvent evt) {
}
// Variables declaration - do not modify
private javax.swing.JPanel background_Panel;
private javax.swing.JLabel jLabel1;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JScrollPane jScrollPane2;
private javax.swing.JScrollPane jScrollPane3;
private javax.swing.JTable jTable1;
private javax.swing.JTable jTable2;
private javax.swing.JTable jTable3;
private javax.swing.JPanel left_Panel;
private javax.swing.JButton powrot_Button;
private javax.swing.JButton zakladka1_Button;
// End of variables declaration
}
public class Background2 extends javax.swing.JPanel {
private JPanel mainPanel;
public Background2(JPanel panel) {
mainPanel=panel;
initComponents();
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
loginFieldLabel = new javax.swing.JLabel();
zalogujButton = new javax.swing.JButton();
loginField = new javax.swing.JTextField();
passwordField = new javax.swing.JPasswordField();
logowanieLabel = new javax.swing.JLabel();
passwordFieldLabel = new javax.swing.JLabel();
jButton1 = new javax.swing.JButton();
loginFieldLabel.setText("Login");
zalogujButton.setText("Zaloguj");
zalogujButton.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
zalogujButtonActionPerformed(evt);
}
});
loginField.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
loginFieldActionPerformed(evt);
}
});
passwordField.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
passwordFieldActionPerformed(evt);
}
});
logowanieLabel.setText("Logowanie");
passwordFieldLabel.setText("Hasło");
jButton1.setText("jButton1");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(this);
this.setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.TRAILING)
.add(layout.createSequentialGroup()
.addContainerGap(org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.add(zalogujButton)
.add(149, 149, 149))
.add(org.jdesktop.layout.GroupLayout.LEADING, layout.createSequentialGroup()
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.TRAILING)
.add(org.jdesktop.layout.GroupLayout.LEADING, layout.createSequentialGroup()
.addContainerGap()
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(logowanieLabel)
.add(layout.createSequentialGroup()
.add(56, 56, 56)
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(passwordFieldLabel)
.add(loginFieldLabel))
.add(26, 26, 26)
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING, false)
.add(loginField)
.add(passwordField, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 193, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)))))
.add(org.jdesktop.layout.GroupLayout.LEADING, layout.createSequentialGroup()
.add(105, 105, 105)
.add(jButton1)))
.addContainerGap(190, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.addContainerGap()
.add(logowanieLabel)
.add(29, 29, 29)
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
.add(loginField, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.add(loginFieldLabel))
.add(28, 28, 28)
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
.add(passwordFieldLabel)
.add(passwordField, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
.add(33, 33, 33)
.add(zalogujButton)
.addPreferredGap(org.jdesktop.layout.LayoutStyle.UNRELATED)
.add(jButton1)
.addContainerGap(101, Short.MAX_VALUE))
);
}// </editor-fold>
private void zalogujButtonActionPerformed(java.awt.event.ActionEvent evt) {
}
private void loginFieldActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void passwordFieldActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
CardLayout cl = (CardLayout) (mainPanel.getLayout());
cl.show(mainPanel, "card2");
mainPanel.revalidate();
mainPanel.repaint();
}
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JTextField loginField;
private javax.swing.JLabel loginFieldLabel;
private javax.swing.JLabel logowanieLabel;
private javax.swing.JPasswordField passwordField;
private javax.swing.JLabel passwordFieldLabel;
private javax.swing.JButton zalogujButton;
// End of variables declaration
}
Edit:
CardLayout cl = (CardLayout) (mainPanel.getLayout());
cl.show(mainPanel, "card1");
l.preferredLayoutSize(mainPanel);//l = ShowingSizeCardLayout i added here prints on dim.width and dim.height
mainPanel.revalidate();
output:
width: 509
height: 323
width: 1203
height: 537
but it is always 509 323.
The default behaviour of CardLayout is to set the container's preferred size as the component that is showing size plus insets.
You should subclass CardLayout and override
preferredLayoutSize method:
class ShowingSizeCardLayout extends CardLayout {
public Dimension preferredLayoutSize(Container container) {
Insets insets = container.getInsets();
Dimension dim = null;
for (Component component : container.getComponents()) {
if (component.isVisible()) {
dim = component.getPreferredSize();
}
}
dim.width += insets.left + insets.right;
dim.height += insets.top + insets.bottom;
return dim;
}
}
This will do, but add code to check for null pointers.