//import java.awt.*;

import javax.swing.*;
import java.awt.FlowLayout;
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.Dimension;

/**
 * <PRE>
 * the GUI for the Pixmap application
 * separation of GUI from application makes it easier to
 * modify either one although these classes are still tightly
 * coupled
 *</PRE>
 *
 * @see PixApp
 *
 * @author Owen Astrachan
 */

public class PixGui extends JFrame
{
    /**
     * construct a GUI
     * @param app the application bound to this GUI
     */
    public PixGui(PixController control)
    {
	myControl = control;

	setTitle("Pixmap Viewer");

	JPanel contentPane = new JPanel();
	
	contentPane.setLayout(new BorderLayout());

	// button bar at top 
	
	myButtonPanel = new JPanel();
	myButtonPanel.setLayout(new FlowLayout(FlowLayout.CENTER));
	contentPane.add(myButtonPanel, BorderLayout.NORTH);

	// scrollable panel for images in center
	
	myImagePanel = new JPanel(new GridLayout(0,3));
	myScroller   = new JScrollPane(myImagePanel);
	myScroller.setPreferredSize(new Dimension(OUR_WIDTH, OUR_HEIGHT));
	contentPane.add(myScroller, BorderLayout.CENTER);

	// create all commands
	Command read  = new ReadCommand(myControl);
	Command vert  = new SimpCommand(myControl,new VertReflect());
	Command horiz = new SimpCommand(myControl,new HorizReflect());
	Command expand = new SimpCommand(myControl, new ExpandOperator(this));

	// use anonymous inner class to show how this works
	// see class Invert below
	
	Command invert = new SimpCommand(myControl,
					 new PixmapOperator()
					 {
					     public void execute()
					     {
						 myPixmap.invert();
					     }
					 });
	
	Command quit =   new QuitCommand(myControl);

	// create a menu item for each command
	// (should create a helper function to do this, associating
	//  each menu item with a command)
	
	JMenuItem openMI = new JMenuItem("Open");
	openMI.addActionListener(read);
    
	JMenuItem quitMI = new JMenuItem("Quit");
	quitMI.addActionListener(quit);
    
	JMenuItem vertMI = new JMenuItem("Vert");
	vertMI.addActionListener(vert);
    
	JMenuItem horizMI = new JMenuItem("Horiz");
	horizMI.addActionListener(horiz);

	JMenuItem invertMI = new JMenuItem("Invert");
	invertMI.addActionListener(invert);

	JMenuItem expandMI = new JMenuItem("Expand");
	expandMI.addActionListener(expand);

	// set up a menu bar with "file" and "pix" menus
	
	myMenuBar = new JMenuBar();
	JMenu fileMenu = new JMenu("File");
	myMenuBar.add(fileMenu);
	JMenu pixMenu = new JMenu("Pix", true);   // tear-off
	myMenuBar.add(pixMenu);
	setJMenuBar(myMenuBar); 

	// add the menu items to the menus
	
	fileMenu.add(openMI);
	fileMenu.add(quitMI);
	pixMenu.add(vertMI);
	pixMenu.add(horizMI);
	pixMenu.add(invertMI);
	pixMenu.add(expandMI);

	// now the buttons
	JButton openJButton = new JButton("Open");
	openJButton.addActionListener(read);
    
	JButton quitJButton = new JButton("Quit");
	quitJButton.addActionListener(quit);
    
	JButton vertJButton = new JButton("Vert");
	vertJButton.addActionListener(vert);
    
	JButton horizJButton = new JButton("Horiz");
	horizJButton.addActionListener(horiz);

	// add buttons to button panel
	
	myButtonPanel.add(openJButton);
	myButtonPanel.add(vertJButton);
	myButtonPanel.add(horizJButton);
	myButtonPanel.add(quitJButton);

	// make the content part of the frame
	
	setContentPane(contentPane);

	// make the window resize to fit all elements 'add'ed to the frame
	pack();
	
	// display the window frame
	// show();
	setVisible(true);
    }

    /**
     * adds an image (via its thumbnail) to the GUI
     * @param icon the thumbnail version of the added Pixmap
     *     
     */
    
    public void addImage(PixIcon icon)
    {
	myImagePanel.add(icon);
	((JComponent)getContentPane()).revalidate();
	((JComponent)getContentPane()).repaint();
    }

    private PixController  myControl;     // associated controller
    private JPanel       myButtonPanel;    // panel for buttons
    private JMenuBar     myMenuBar;        // where the menus are
    private JPanel       myImagePanel;     // thumbnails displayed here
    private JScrollPane  myScroller;       // scrolls the thumbnails

    private static final int OUR_WIDTH  = 300;
    private static final int OUR_HEIGHT = 200;
}


class VertReflect extends PixmapOperator
{
    public VertReflect()
    {
	
    }
    
    public void execute()
    {
	myPixmap.vertReflect();
    }
}

class HorizReflect extends PixmapOperator
{
    public HorizReflect()
    {
	
    }
    
    public void execute()
    {
	myPixmap.horizReflect();
    }
}

class Invert extends PixmapOperator
{
    public Invert()
    {
	
    }

    public void execute()
    {
	myPixmap.invert();
    }
}