[[:oktatas:programozás:java|< Java]]

====== Java GUI AWT ======

  * **Szerző:** Sallai András
  * Copyright (c) 2011, Sallai András
  * Szerkesztve: 2011, 2012
  * Licenc: [[https://creativecommons.org/licenses/by-sa/4.0/|CC BY-SA 4.0]]
  * Web: https://szit.hu

===== Bevezetés =====

Abstract Window Toolkit (AWT)

Ennek a fejezetnek a megvalósításához feltételezem a Java alapismereteket és a Java objektumorientált programozási ismereteket.
Jelenleg fejlesztés alatt van, ajánlott a "Java GUI Swing" használata. Mi a különbség az AWT és a Swing között?
Az AWT rendszerben készül programok minden operációs rendszeren másként nézne ki, mivel a komponensek kinézete a
az operációs rendszer ablakozó felületéhez igazodik.


===== Első program =====


<code java Program.java>
import java.awt.*;

class Program extends Frame
{
	Program()
	{
		
		setSize(400, 300);
		setVisible(true);
	}
	
	public static void main(String args[])
	{
		new Program();
	}
}
</code>




===== Ablakbezárás kezelése =====
Figyeljük meg, hogy az előző ablakunk valójában nem záródik be. 
Rá kell vennünk az ablakot, hogy figyelje a Close eseményt és 
lépjen ki erre.


<code java Program.java>
import java.awt.Frame;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

class Program extends Frame
{
	Program()
	{
		addWindowListener(new AblakKezeles());
		setSize(400, 300);
		setVisible(true);
	}
	
	class AblakKezeles extends WindowAdapter
	{
		public void windowClosing(WindowEvent e)
		{
			System.exit(0);
		}
	}
	
	public static void main(String[] args)
	{
		new Program();
	}	
}
</code>


===== Ablakesemények interfésszel =====

<code java Program01.java>
import java.awt.Frame;
import java.awt.Button;
import java.awt.event.WindowListener;
import java.awt.event.WindowEvent;

class Program01 extends Frame
{
	Button button1 = new Button("Klikk");
	Program01()
	{
		addWindowListener(new WindowListener()
		{
			public void windowClosing(WindowEvent e)
			{
				System.exit(0);
			}
			public void windowDeactivated(WindowEvent e){}
			public void windowActivated(WindowEvent e){}
			public void windowDeiconified(WindowEvent e){}
			public void windowIconified(WindowEvent e){}
			public void windowClosed(WindowEvent e){}
			public void windowOpened(WindowEvent e){}
		});
		add(button1);
		pack();
		setVisible(true);
	}
	public static void main(String args[])
	{
		new Program01();
	}
}
</code>


===== Nyomógomb elhelyezése =====

<code java Program.java>
import java.awt.Frame;
import java.awt.Button;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

class Program extends Frame
{
	Button gomb;
	Program()
	{
		gomb = new Button("Klikkelj ide");
		
		add(gomb);
		addWindowListener(new AblakKezeles());
		setSize(400, 300);
		setVisible(true);
	}
	
	class AblakKezeles extends WindowAdapter
	{
		public void windowClosing(WindowEvent e)
		{
			System.exit(0);
		}
	}
	
	public static void main(String[] args)
	{
		new Program();
	}	
}
</code>

Ebben a formában kitölti az egész képernyőt. 

Most alkalmazzuk a pack() metódust az ablakon, így az ablak
igazodik annak tartalmához, vagyis felveszi a nyomógomb méretét.


<code java Program.java>
import java.awt.Frame;
import java.awt.Button;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

class Program extends Frame
{
	Button gomb;
	Program()
	{
		gomb = new Button("Klikkelj ide");
		
		add(gomb);
		addWindowListener(new AblakKezeles());
		//~ setSize(400, 300);
		pack();
		setVisible(true);
	}
	
	class AblakKezeles extends WindowAdapter
	{
		public void windowClosing(WindowEvent e)
		{
			System.exit(0);
		}
	}
	
	public static void main(String[] args)
	{
		new Program();
	}	
}
</code>


Vegyük észre, hogy megjegyzésbe tettem a setSize(400,300);-as utasítást,
mivel a pack() metódus mellett nincs értelme.




===== Eseménykezelő =====

==== Ablakesemény ====


<code java Program.java>
import java.awt.Frame;
import java.awt.Button;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

class Program extends Frame
{
	Button gomb;
	Program()
	{
		gomb = new Button("Klikkelj ide erre a gombra");
		
		gomb.addActionListener(new Gomb_Click());
		
		add(gomb);
		addWindowListener(new AblakKezeles());
		//~ setSize(400, 300);
		pack();
		setVisible(true);
	}
	
	class Gomb_Click implements ActionListener
	{
		public void actionPerformed(ActionEvent e)
		{
			setTitle("Lenyomva");
		}
	}
	class AblakKezeles extends WindowAdapter
	{
		public void windowClosing(WindowEvent e)
		{
			System.exit(0);
		}
	}
	
	public static void main(String[] args)
	{
		new Program();
	}	
}
</code>


==== Ablakesemény interfésszel ====

<code java Program.java>
import java.awt.Frame;
import java.awt.event.WindowListener;
import java.awt.event.WindowEvent;
class Program extends Frame implements WindowListener
{
	Program()
	{
		addWindowListener(this);
		setSize(400, 300);
		setVisible(true);
	}
	
	public void windowDeactivated(WindowEvent e)
	{
		
	}
	public void windowActivated(WindowEvent e)
	{
		
	}
	public void windowDeiconified(WindowEvent e)
	{
		
	}
	public void windowIconified(WindowEvent e)
	{
		
	}
	public void windowClosed(WindowEvent e)
	{
		
	}
	public void windowClosing(WindowEvent e)
	{
		System.exit(0);
	}
	public void windowOpened(WindowEvent e)
	{
		
	}
	public static void main(String args[])
	{
		new Program();
	}
}
</code>


===== Elrendezéskezelő nélkül =====

<code java Program.java>
import java.awt.Frame;
import java.awt.Button;
import java.awt.Label;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.FlowLayout;
class Program extends Frame
{
	Button gomb;
	Label cimke;
	Program()
	{
		gomb = new Button("Klikkelj ide erre a gombra");
		cimke = new Label("Több komponensű program");
		gomb.addActionListener(new Gomb_Click());
		
		gomb.setBounds(10, 50, 150, 30);
		cimke.setBounds(10, 100, 180, 30);
		
		add(gomb);
		add(cimke);
		setLayout(null);
		addWindowListener(new AblakKezeles());
		setSize(400, 300);		
		setVisible(true);
	}
	
	class Gomb_Click implements ActionListener
	{
		public void actionPerformed(ActionEvent e)
		{
			setTitle("Lenyomva");
		}
	}
	class AblakKezeles extends WindowAdapter
	{
		public void windowClosing(WindowEvent e)
		{
			System.exit(0);
		}
	}
	
	public static void main(String[] args)
	{
		new Program();
	}	
}
</code>



===== Több komponens =====

<code java Program.java>
import java.awt.Frame;
import java.awt.Button;
import java.awt.Label;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.FlowLayout;
class Program extends Frame
{
	Button gomb;
	Label cimke;
	Program()
	{
		gomb = new Button("Klikkelj ide erre a gombra");
		cimke = new Label("Több komponensű program");
		gomb.addActionListener(new Gomb_Click());
		
		add(gomb);
		add(cimke);
		setLayout(new FlowLayout());
		addWindowListener(new AblakKezeles());
		pack();
		setVisible(true);
	}
	
	class Gomb_Click implements ActionListener
	{
		public void actionPerformed(ActionEvent e)
		{
			setTitle("Lenyomva");
		}
	}
	class AblakKezeles extends WindowAdapter
	{
		public void windowClosing(WindowEvent e)
		{
			System.exit(0);
		}
	}
	
	public static void main(String[] args)
	{
		new Program();
	}	
}
</code>



===== Billentyűzetfigyelés =====


<code java Program.java>
import java.awt.Frame;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.KeyListener;
import java.awt.event.KeyEvent;

class Program extends Frame
{
	Program()
	{
		addKeyListener(new BillentyuKezeles());
		addWindowListener(new AblakKezeles());
		setSize(400, 300);
		setVisible(true);
	}
	class BillentyuKezeles implements KeyListener
	{
		public void keyPressed(KeyEvent e)
		{
			
			switch(e.getKeyCode())
			{
				case KeyEvent.VK_A : setTitle("a"); break;
				case KeyEvent.VK_B : setTitle("b"); break;
				case KeyEvent.VK_C : setTitle("c"); break;
				case KeyEvent.VK_1 : setTitle("1"); break;
				case KeyEvent.VK_2 : setTitle("2"); break;				
			}
		}
		public void keyReleased(KeyEvent e)
		{

		}
		public void keyTyped(KeyEvent e)
		{

		}

	}

	class AblakKezeles extends WindowAdapter
	{
		public void windowClosing(WindowEvent e)
		{
			System.exit(0);
		}
	}

	public static void main(String[] args)
	{
		new Program();
	}
}
</code>

===== Eseménykezelés belső osztály nélkül =====


<code java Program.java>
import java.awt.Frame;
import java.awt.Button;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

class Program extends Frame implements ActionListener
{
	Button gomb;
	Program()
	{
		gomb = new Button("Nyomj meg");
		gomb.setBounds(50, 50, 100, 30);
		gomb.addActionListener(this);
		add(gomb);
		setLayout(null);
		setSize(400, 300);
		setVisible(true);
	}
	public void actionPerformed(ActionEvent e)
	{
		setTitle("Esemény volt");
	}

	public static void main(String args[])
	{
		new Program();
	}
}
</code>

Több komponens

<code java Program.java>
import java.awt.Frame;
import java.awt.Button;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

class Program extends Frame implements ActionListener
{
	Button gomb1;
	Button gomb2;
	Program()
	{
		gomb1 = new Button("Nyomj meg");
		gomb2 = new Button("Vagy nyomd ezt");
		gomb1.setBounds(50, 50, 100, 30);
		gomb2.setBounds(50, 90, 100, 30);
		gomb1.addActionListener(this);
		gomb2.addActionListener(this);
		add(gomb1);
		add(gomb2);
		setLayout(null);
		setSize(400, 300);
		setVisible(true);
	}
	public void actionPerformed(ActionEvent e)
	{
		if(e.getSource() == gomb1)
			setTitle("Első gomblt");
		if(e.getSource() == gomb2)
			setTitle("Második gombon");
	}

	public static void main(String args[])
	{
		new Program();
	}
}
</code>


===== TabPanel =====

TabPanel egyszerűen:

<code java>

import java.awt.*;
import javax.swing.JTabbedPane;

class tabpanel extends Frame 
{
	
	tabpanel(String cim)
	{
		super(cim);
		
		JTabbedPane tabbedPane;
		tabbedPane = new JTabbedPane(JTabbedPane.TOP);
		tabbedPane.addTab("Első", new Label("Felirat 1 "));
		tabbedPane.addTab("Második", new Label("Felirat 2 "));
		add(tabbedPane);
	}
		
	public static void main(String args[])
	{
				
		tabpanel ablak = new tabpanel("tabpanel");
		ablak.pack();
		ablak.setVisible(true);
				
	}
		
}

</code>


===== Ablakállapotok =====

<code java Program.java>
import java.awt.*;

class Program extends Frame
{
	Program() throws Exception
	{
		setSize(400, 300);
		setVisible(true);
		
                // Sleep for 3 seconds, then minimize
                Thread.sleep (3000);
                setState ( Frame.ICONIFIED );

                // Sleep for 3 seconds, then restore
                Thread.sleep (3000);
                setState ( Frame.NORMAL );		

                // Sleep for 3 seconds, then kill window
                Thread.sleep (3000);
                setVisible (false);
                dispose();

                // Terminate test
                System.exit(0);	
	}
	public static void main(String args[]) throws Exception
	{
		new Program();
	}
}
</code>


===== Komponensek =====
  * Component
    * Button
    * Label
    * Choice
    * TextComponenet
      * TextField
      * TextArea
    * Checkbox
    * List
    * Scrollbar
    * Container
      * Panel-Applet
      * ScrollPane
      * Window
        * Dialog
        * Frame
    * Canvas
===== Egér mozgatása =====



<code java Program01.java>
import java.awt.Robot;
import java.awt.AWTException;


class Program01
{
	public static void main(String[] args)
	{
		try
		{
			Robot r = new Robot();
			r.mouseMove(40,40);
		}
		catch(AWTException e) {}
	}
}
</code>