// $Id: titlescreendisplay.cc,v 1.7 2006/08/23 22:43:17 matthew Exp $

//  Fish Supper
//  Copyright (C) 2006 Matthew Clarke <matthew_larcke@lycos.co.uk>
//
//  This program is free software; you can redistribute it and/or
//  modify it under the terms of the GNU General Public License
//  as published by the Free Software Foundation; either version 2
//  of the License, or (at your option) any later version.
//
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
// 
//  You should have received a copy of the GNU General Public License
//  along with this program; if not, write to the Free Software
//  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
//  02111-1307, USA.




#include "titlescreendisplay.h"
#include "SDL_image.h"
#include <iostream>
#include <cstdlib>
#include "fontrepository.h"




extern FS::FontRepository * font_rep;




// *******************
// *** CONSTRUCTOR ***
// *******************
FS::TitleScreenDisplay::TitleScreenDisplay(SDL_Surface * s)
{
    // save a pointer to main screen for drawing on
    screen = s;
    
    // load the images we need
    backdrop = IMG_Load( PKG_DATA_DIR "/images/titlescreen/intro_screen.png" );    
    
    int temp[] = { 180, 250, 320, 390 };
    char * temp2[] = { "Play", "Settings", "High Scores", "Quit" };
    for (int i = 0; i < NUM_OPTIONS; ++i)
    {
        options_ys[i] = temp[i];
        options_strings[i] = temp2[i];
        options_strings_widths[i] = font_rep->get_SFont(
                FontRepository::LARGE_FONT).getTextWidth(options_strings[i]);
    } // for
    
    for (int i = 0; i < 2; ++i)
    {
        dirty_rects[i].x = OPTIONS_X;
        dirty_rects[i].h = font_rep->get_SFont(FontRepository::LARGE_FONT).getHeight();
    } // for
        
    current_selection = 0;
  
} // FS::TitleScreenDisplay::TitleScreenDisplay()    
 
// ******************
// *** DESTRUCTOR ***
// ******************
FS::TitleScreenDisplay::~TitleScreenDisplay()
{
    SDL_FreeSurface(backdrop);
    
} // FS::TitleScreenDisplay::~TitleScreenDisplay()    




// ************************
// *** MEMBER FUNCTIONS ***
// ************************

// **************************************************

void FS::TitleScreenDisplay::redraw()
{
    SDL_BlitSurface(backdrop, NULL, screen, NULL);
     
    for (int i = 0; i < NUM_OPTIONS; ++i)
    {   
        if (i == current_selection)
        {
            font_rep->get_SFont(FontRepository::LARGE_FONT).write(screen, options_strings[i], 
                    OPTIONS_X, options_ys[i]);
        }
        else 
        {
            font_rep->get_SFont(FontRepository::LARGE_FONT_FAINT).write(screen, 
                    options_strings[i], OPTIONS_X, options_ys[i]);
        } // if ... else
    } // for    
           
    SDL_UpdateRect(screen, 0, 0, 0, 0); 
    
} // FS::TitleScreenDisplay::redraw()

// **************************************************

FS::TitleScreenDisplay::Selection FS::TitleScreenDisplay::update(KeyboardEvent * events, int n)
{
    bool changed = false;
    Selection sel = NONE;
    int i = 0;
    
    old_selection = current_selection;
    
    while (i < n)
    {
        if ( events[i] == ESCAPE_PRESSED )
        {
            sel = QUIT;
            break;
        } 
        else if ( events[i] == JUMP_KEY_PRESSED )
        {
            sel = (Selection) current_selection;
            break;
        }
        else if ( events[i] == DOWN_KEY_PRESSED )
        {
            current_selection = (current_selection + 1) % NUM_SELECTIONS;
            changed = true;
        }
        else if ( events[i] == UP_KEY_PRESSED )
        {
            --current_selection;
            if (current_selection < 0)
            {
                current_selection = (NUM_SELECTIONS - 1);
            } // if
            changed = true;
        } // if ... else
        ++i;
    } // while
    
    if (changed)
    {
        redraw_options();
    } // if
    
    return sel;
            
} // FS::TitleScreenDisplay::update() 

// **************************************************

void FS::TitleScreenDisplay::redraw_options()
{    
    // repair background
    dirty_rects[0].y = options_ys[old_selection];
    dirty_rects[0].w = options_strings_widths[old_selection];
    SDL_BlitSurface(backdrop, &dirty_rects[0], screen, &dirty_rects[0]);
    font_rep->get_SFont(FontRepository::LARGE_FONT_FAINT).write(screen, 
            options_strings[old_selection], OPTIONS_X, options_ys[old_selection]);
    
    // draw new highlighted selection
    dirty_rects[1].y = options_ys[current_selection];
    dirty_rects[1].w = options_strings_widths[current_selection];
    font_rep->get_SFont(FontRepository::LARGE_FONT).write(screen, 
            options_strings[current_selection], OPTIONS_X, options_ys[current_selection]);
    
    SDL_UpdateRects(screen, 2, dirty_rects);
          
} // FS::TitleScreenDisplay::redraw_options()                
    
// **************************************************