Objekte weitergeben

[mavinatic]

package GraphicalUserInterface;

import java.awt.BorderLayout;
import java.awt.Dimension;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

import Listener.MenuListener;

public class UserInterface extends JFrame {

	private MyMenu menu = null;
	private MenuPanel menuP = null;
	private ContentPanel contentP = null;
	private JPanel mainPanel = null;

	
	public UserInterface() throws ClassNotFoundException,
			InstantiationException, IllegalAccessException,
			UnsupportedLookAndFeelException {

		UIManager
				.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
		setFrame();

		mainPanel = new JPanel();
		BorderLayout Layout = new BorderLayout();
		setLayout(Layout);
		setMenu();
		setContent();

		menu = new MyMenu();
		setJMenuBar(menu);

		add(mainPanel);
		
		menuP.setPanel(contentP);
		
		setVisible(true);

	}

	public void setFrame() {
		setSize(500, 500);
		setTitle("AdressbookGUI - Test");
		setResizable(false);
		setLocationRelativeTo(null);
		setDefaultCloseOperation(EXIT_ON_CLOSE);
	}

	public void setMenu() {
		menuP = new MenuPanel();
		mainPanel.add("North", menuP);
	}

	public void setContent() {
		contentP = new ContentPanel();
		[B]menuP.setPanel(contentP);[/B]
		mainPanel.add("Center", contentP);
	}

	public static void main(String[] args) throws ClassNotFoundException,
			InstantiationException, IllegalAccessException,
			UnsupportedLookAndFeelException {
		UserInterface ui = new UserInterface();

	}

}

Übergabe vom ContentPanel ins MenuPanel

package GraphicalUserInterface;

import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;

import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JPanel;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.filechooser.FileFilter;

import Listener.MenuListener;


public class MenuPanel extends JPanel {

	JButton[] button = new JButton[7];
	String button_icon[] = new String[] { "new.png", "edit.png", "delete.png",
			"search.png", "dbload.png", "dbsave.png", "settings.png" };
	String button_tooltip[] = new String[] { "Neuen Kontakt hinzufügen",
			"Kontakt editieren", "Kontakt löschen", "Kontakt suchen",
			"Kontaktdatenbank laden", "Kontaktdatenbank speichern",
			"Einstellungen" };
	String button_text[] = new String[] { "addUser", "editUser", "deleteUser",
			"searchUser", "dbLoad", "dbSave", "settings" };
	 MenuListener mListener = new MenuListener();
	 ContentPanel panel = null;
	
	public void setPanel(ContentPanel panel) {
		this.panel = panel;
	}

	public MenuPanel() {
		
		GridLayout Layout = new GridLayout(1, 8);
		setLayout(Layout);
		MenuComponents();
		[B]mListener.setPanel(panel);[/B]
	}

	public void MenuComponents() {
		for (int i = 0; i < button.length; i++) {
			URL path = getClass().getResource("/ap/icons/" + button_icon[i]);
			button[i] = new JButton(new ImageIcon(path));
			button[i].setToolTipText(button_tooltip[i]);
			button[i].setPreferredSize(new Dimension(60, 50));
			button[i].setName(button_text[i]);
			button[i].addActionListener(mListener);
			add(button[i]);
		}
	}
}

Übergabe zum mListener

package Listener;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.FileNotFoundException;
import java.util.ArrayList;

import javax.swing.JButton;

import Data.User;
import GraphicalUserInterface.ContentPanel;
import GraphicalUserInterface.FileChooserLoad;
import HandleData.ConvertData;
import HandleData.LoadData;

public class MenuListener implements ActionListener 
{
	ArrayList<User> userList = new ArrayList<User>();
	LoadData ld = new LoadData();
	ConvertData cd = new ConvertData();
	FileChooserLoad fLoad = null;
	String openFile;
	String[][] rowData;
	ContentPanel Panel = null;


	public void setPanel(ContentPanel panel) {
		Panel = panel;
	}




	@Override
	public void actionPerformed(ActionEvent arg0) {
		// TODO Auto-generated method stub
		JButton button = (JButton) arg0.getSource();
		
		if (button.getName().equals("dbLoad"))
		{
			fLoad = new FileChooserLoad();
			openFile = fLoad.fChooserOpen();
			try {
				userList = ld.readFile(openFile);
			} catch (FileNotFoundException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			rowData = cd.convert(userList);
			
			[B]Panel.setRowData(rowData);
			Panel.revalidate();[/B]
		}
	}

}

Setzen des ContentPanel (JTable)...aber iwie kommt bei "Panel.setRowData(rowData)" NullPointerException!? Ich weiß nicht wodrans liegen kann...ich hab doch das Objekt weitergegeben...?!

 

[SlaterB]

> mListener.setPanel(panel);
geschieht im Konstruktor von MenuPanel, da ist panel noch null

wenn später (sogar 2x) setPanel in MenuPanel aufgerufen wird, dann bekommt der Listener davon nix mit

 

[mavinatic]

bin leider noch anfänger, ich versteh das iwie nicht wo soll ich das sons hintun?

 

[SlaterB]

kopiere z.B.
mListener.setPanel(panel);
auch in die Methode setPanel in MenuPanel,
wenn die Klasse also aktualisiert wird, dann auch an den Listener weiterreichen