/*
 * Ristipolku IDM button widget
 * (C) Copyright 2011 Matti 'ccr' Hämäläinen <ccr@tnsp.org>
 */
package game;

import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.awt.geom.*;
import javax.imageio.*;
import java.io.*;


public class IDMButton extends IDMWidget
{
    enum State { FOCUSED, PRESSED, NORMAL }
    State state;
    static BufferedImage imgUp, imgPressed;
    Font font;
    FontMetrics metrics;
    String text;
    boolean active;
 
    public IDMButton(IDMPoint pos, int keyCode, Font font, String text)
    {
        loadImages();
        this.pos = pos;
        this.font = font;
        this.keyCode = keyCode;
        this.text = text;
        state = State.NORMAL;
        active = false;
    }
    
    public IDMButton(float x, float y, int keyCode, Font font, String text)
    {
        this(new IDMPoint(x, y), keyCode, font, text);
    }
    
    private static void loadImages()
    {
        if (imgUp != null && imgPressed != null)
            return;

        try
        {
            ResourceLoader res = new ResourceLoader("graphics/button1_up.png");
            imgUp = ImageIO.read(res.getStream());

            res = new ResourceLoader("graphics/button1_down.png");
            imgPressed = ImageIO.read(res.getStream());
        }
        catch (IOException e)
        {
            System.out.print(e.getMessage());
        }
    }
    
    public void paint(Graphics2D g)
    {
        BufferedImage img;
        int xoffs, yoffs;

        if (state == State.PRESSED)
        {
            img = imgPressed;
            xoffs = yoffs = 5;
        }
        else
        {
            xoffs = yoffs = 0;
            img = imgUp;
        }

        if (metrics == null)
            metrics = g.getFontMetrics(font);
        
        int textWidth = metrics.stringWidth(text);
        g.drawImage(img, getScaledX() + xoffs, getScaledY() + yoffs, null);

        g.setFont(font);
        g.setPaint(Color.black);
        g.drawString(text,
           getScaledX() + xoffs * 2 + (img.getWidth() - textWidth) / 2,
           getScaledY() + yoffs * 2 + img.getHeight() / 2);
    }
    
    public boolean contains(Point where)
    {
        return (where.x >= getScaledX() && where.y >= getScaledY() &&
                where.x < getScaledX() + imgUp.getWidth() &&
                where.y < getScaledY() + imgUp.getHeight());
    }
    
    public void mousePressed(MouseEvent e)
    {
        state = State.PRESSED;
        active = true;
    }

    public void mouseReleased(MouseEvent e)
    {
        super.mouseReleased(e);
        state = State.NORMAL;
        active = false;
    }

    public void mouseEntered(MouseEvent e)
    {
        if (active)
            state = State.PRESSED;
    }

    public void mouseExited(MouseEvent e)
    {
        if (active)
            state = State.NORMAL;
    }
}