I am having trouble updating one of my JPanel based on a JList click found in another panel. I have tried using the code I found here:
repaint JPanel with every click at JList
but I still have issues. I have pasted my code below:
import javax.swing.ListSelectionModel;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
public class SelectionFrame extends JFrame {
private BufferedImage backgroundImage;
private JList<Object> superClassList;
private JPanel contentPane;
private CharacterListPanel clp;
private CharacterDetailsPanel cdp;
private CardLayout card = new CardLayout();
protected SelectionFrame() {
// Create the background image
try {
backgroundImage = ImageIO.read(new File(GUIConfig.DEFAULT_GAME_BACKGROUND));
} catch (Exception e) {
e.printStackTrace();
}
// Set the title to the default
setTitle(GUIConfig.DEFAULT_GAME_TITLE);
// Set the frame background
contentPane = new JPanel(){
public void paintComponent(Graphics g) {
Image img = Toolkit.getDefaultToolkit().getImage(Gui.class.getResource("/others/background_1.png"));
g.drawImage(img, 0, 0, this.getWidth(), this.getHeight(), this);
}
};
contentPane.setBackground(new Color(238, 238, 238));
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
// Add Character List Panel to JFrame
clp = new CharacterListPanel();
cdp = new CharacterDetailsPanel();
add(clp, BorderLayout.LINE_START);
add(cdp, BorderLayout.LINE_END);
// Grab its list and store it in super class list
superClassList = clp.getCharacterList();
// List for change in list
superClassList.getSelectionModel().addListSelectionListener(new ListSelectionListener() {
@Override
public void valueChanged(ListSelectionEvent e) {
if (!e.getValueIsAdjusting()) {
String selectedVal = superClassList.getSelectedValue().toString();
System.out.println(selectedVal);
cdp.setName(selectedVal);
repaint();
}
}
});
// Set the size of the frame to the default, center frame, hide top level and do not allow resizing
setSize(GUIConfig.DEFAULT_SELECTION_MENU_WIDTH, GUIConfig.DEFAULT_SELECTION_MENU_HEIGHT);
setLocation(GUIConfig.HALF_DIMENSION_WIDTH - (int) this.getSize().getWidth()/2, GUIConfig.HALF_DIMENSION_HEIGHT - (int) this.getSize().getHeight()/2);
setUndecorated(true);
setResizable(false);
pack();
// Show frame
setVisible(true);
setDefaultCloseOperation(EXIT_ON_CLOSE);
}
// This sub class is used to display the list of playable characters. it will include the character name and character icon
class CharacterListPanel extends JPanel {
private JList<Object> characterList;
protected CharacterListPanel() {
// Create list to hold name and icon for characters
characterList = new JList<Object>();
// Set list details
characterList.setBorder(new LineBorder(Color.BLACK));
characterList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
// Map of characters
Map<Object, ImageIcon> characters = new HashMap<Object, ImageIcon>();
// Loop through default character names and retrieve character icon file paths
for(int i = 0; i < GUIConfig.DEFAULT_CHARACTER_NAMES.size(); i+=1) {
ImageIcon img = new ImageIcon(GUIConfig.DEFAULT_CHARACTER_SYMBOLS.get(GUIConfig.DEFAULT_CHARACTER_NAMES.get(i)));
characters.put(GUIConfig.DEFAULT_CHARACTER_NAMES.get(i), img);
}
// Add items to the list
characterList.setListData(GUIConfig.DEFAULT_CHARACTER_NAMES.toArray());
characterList.setCellRenderer(new IconListRenderer(characters));
// Add list to JPanel
add(characterList);
// Remove grey background of JPanel
setOpaque(false);
}
protected JList<Object> getCharacterList() {
return characterList;
}
}
// This sub class is used to display the character details card based on what the user has selected in the list
class CharacterDetailsPanel extends JPanel {
private String name = null;
protected CharacterDetailsPanel() {
System.out.println(getName());
if(getName() == null || getName().isEmpty()){
try {
BufferedImage img = ImageIO.read(new File(GUIConfig.DEFAULT_CHARACTER_DETAILS.get("Default")));
JLabel picLabel = new JLabel(new ImageIcon(img));
add(picLabel);
} catch (IOException e) {
e.printStackTrace();
}
} else {
try {
BufferedImage img = ImageIO.read(new File(GUIConfig.DEFAULT_CHARACTER_DETAILS.get(getName())));
JLabel picLabel = new JLabel(new ImageIcon(img));
add(picLabel);
} catch (IOException e) {
e.printStackTrace();
}
}
// Remove grey background of JPanel
setOpaque(false);
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
public static void main(String[] args) {
SelectionFrame sf = new SelectionFrame();
}
}
In my current iteration above the code is not like that in the link. The reason for this is that I tried code there; I literally copied and pasted and worked my way through it, and nothing happened. I think this is because in his case it's a list added directly to the frame and a panel. In my case its a list in a panel and another panel added to the JFrame. So like I said the code above abandon the sample found in the link. Instead what I tried to do was create the panels add them to the frame, and edit the panel I wanted changed every time a click happened by changing its name value; the name value is used to get the proper file.
