[[oktatas:programozás:java:java_komponensek|< Java komponensek]]

====== Java komponensek - Swing buttonpanel ======

  * **Szerző:** Sallai András
  * Copyright (c) 2023, Sallai András
  * Licenc: [[https://creativecommons.org/licenses/by-sa/4.0/|CC Attribution-Share Alike 4.0 International]]
  * Web: https://szit.hu

===== Bevezetés =====

Java komponensek készítése.


===== Könyvtárszerkezet =====

<code>
app01/
  |-lib/
  |-src/
  |  |-controllers/
  |  |   `-MainController.java
  |  |-models/
  |  |-views/
  |  |   |-ButtonPanel.java
  |  |   `-Mainwindow.java
  |  `-App.java
  |-.gitignore
  `-README.md
</code>

===== ButtonPanel =====

<code java src/views/ButtonPanel.java>
package views;

import java.util.HashMap;

import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JPanel;

public class ButtonPanel extends JPanel{
    public HashMap<String, JButton> buttons;
    public ButtonPanel() {
        this.initPanel();
    }
    public void addButton(String text) {
        JButton button = new JButton(text);
        this.add(button);
        this.buttons.put(text, button);        
    }
    private void initPanel() {
        this.buttons = new HashMap<>();
        this.setLayout(new BoxLayout(this, BoxLayout.LINE_AXIS));
    }
}
</code>


===== A ButtonPanel használata =====

<code java src/App.java>
import controllers.MainController;

public class App {
    public static void main(String[] args) throws Exception {
        new MainController();
    }
}
</code>


<code java src/views/Mainwindow.java>
package views;

import javax.swing.JFrame;

public class Mainwindow extends JFrame {
    public ButtonPanel buttonPanel;
    public Mainwindow() {
        initApp();
    }
    private void initApp() {
        this.initComponent();
        this.setComponent();
        this.addComponent();
        this.initWindow();
    }
    private void initComponent() {
        this.buttonPanel = new ButtonPanel();    
    }
    private void setComponent() {
        this.buttonPanel.addButton("Számít");
        this.buttonPanel.addButton("Névjegy");
        this.buttonPanel.addButton("Kilépés");
    }
    private void addComponent() {
        this.add(this.buttonPanel);
    }
    private void initWindow() {
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setSize(400, 300);
        this.setVisible(true);
    }
}

</code>

<code java src/controllers/MainController.java>
package controllers;

import javax.swing.JButton;

import views.Mainwindow;

public class MainController {
    Mainwindow mainwindow;
    public MainController() {
        this.mainwindow = new Mainwindow();
        this.handleEvent();
    }
    private void handleEvent() {

        JButton calcButton = this.mainwindow.buttonPanel.buttons.get("Számít");
        JButton aboutButton = this.mainwindow.buttonPanel.buttons.get("Névjegy");
        JButton exitButton = this.mainwindow.buttonPanel.buttons.get("Kilépés");
        calcButton.addActionListener(e -> {
            System.out.println("Számít árnyékeljárás...");
        });
        aboutButton.addActionListener(e -> {
            System.out.println("Névjegy árnyékeljárás...");
        });
        exitButton.addActionListener(e -> {
            System.out.println("Kilépés árnyékeljárás...");
        });
    }
}
</code>