package testApp;

import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.events.KeyAdapter;
import org.eclipse.swt.events.KeyEvent;
import org.eclipse.swt.events.KeyListener;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;

public class Main
{
    Display display = new Display();
    Shell shell = new Shell(display);
    Button buttonOpen = new Button(shell, SWT.NONE);
    Button buttonClose = new Button(shell, SWT.NONE);
    Shell shellFS;

    public static void main(String[] args)
    {
        new Main();
    }

    Main()
    {
        shell.setBounds(150, 50, 800, 400);

        buttonOpen.setText("Open");
        buttonOpen.setLocation(40, 150);
        buttonOpen.pack();
        buttonOpen.addSelectionListener(openListener);

        buttonClose.setText("Close");
        buttonClose.setLocation(240, 150);
        buttonClose.pack();
        buttonClose.addSelectionListener(closeListener);

        shell.addKeyListener(closeFSWithQ);
        shell.open();

        while (!shell.isDisposed())
        {
            if (!display.readAndDispatch())
                display.sleep();
        }
    }

    SelectionListener openListener = new SelectionListener()
    {
        @Override
        public void widgetSelected(SelectionEvent event)
        {
            open();
        }

        @Override
        public void widgetDefaultSelected(SelectionEvent event)
        {

        }
    };

    SelectionListener closeListener = new SelectionListener()
    {
        @Override
        public void widgetSelected(SelectionEvent event)
        {
            shell.close();
        }

        @Override
        public void widgetDefaultSelected(SelectionEvent event)
        {

        }
    };

    KeyListener closeFSWithQ = new KeyAdapter()
    {
        @Override
        public void keyPressed(KeyEvent e)
        {
            if (e.keyCode == 113)
            {
                close();
            }
        }
    };

    void close()
    {
        shellFS.setFullScreen(false);
        shellFS.close();
    }

    void open()
    {
        shellFS = new Shell(display);
        shellFS.addKeyListener(closeFSWithQ);
        shellFS.setFullScreen(true);
        shellFS.open();
    }
}