# ****************************************************************************
#
#                          Frozen-Bubble Level Editor
#
# Copyright (c) 2002 - 2003 Kim Joham and David Joham <[k|d]joham@yahoo.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2, as
# published by the Free Software Foundation.
#
# 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.
#
#
# *****************************************************************************
#
# Design & Programming by Kim Joham and David Joham, October 2002 - May 2003
#
#
# Integration to Frozen-Bubble by Guillaume Cottenceau - change a few styles
# things, fix a few bugs, add a few features
#
#
# *****************************************************************************

package FBLE;

use feature qw(state);

use POSIX(qw(floor ceil));
use SDL;
use SDL::App;
use SDL::Surface;
use SDL::Event;
use SDL::Cursor;
use SDL::Font;
use SDL::Mixer;

use fb_stuff;
use fbsyms;

use strict;
our ($NUM_ROWS, $NUM_BUBBLES_AVAIL,
     $BUBBLES_PER_ROW, $BUBBLE_OPTION_SEPARATION, $BUBBLE_OPTION_INIT_X,
     $ALPHA_BUBBLE_NO, $ALPHA_BUBBLE_YES, $WOOD_WIDTH, $WOOD_PLANK_HEIGHT,
     $LEFT_WOOD_X, $RIGHT_WOOD_X, $BUBBLE_WOOD_Y, $NAV_WOOD_Y, $LEVELSET_WOOD_Y,
     $LEVEL_WOOD_Y, $HELP_WOOD_Y, $colourblind, $app, $font, %bubble_rects, %bubble_hash, $color,
     $action, $previousx, $previousy, $background, $highlight,
     $highlighted_option, $curr_level, $displaying_dialog, $new_ls_name_text, $surface_dialog,
     $levelset_name, $list_browser_file_start_offset, $list_browser_highlight_offset,
     $surf_shrink, %file_browser_levelsets, @file_browser_levelsets_num_levels,
     $deleted_current_levelset, $jump_to_level_value,
     $modified_levelset, $modified_levelset_action, $button_hold, $command_line_fullscreen, %rect, $start_level);

$NUM_ROWS = 10;
$POS_1P{bottom_limit} = $POS_1P{p1}{top_limit} + $NUM_ROWS * $ROW_SIZE;
$NUM_BUBBLES_AVAIL = 8;
$BUBBLES_PER_ROW = 3;
$BUBBLE_OPTION_SEPARATION = 8;
$BUBBLE_OPTION_INIT_X = 18;
$ALPHA_BUBBLE_NO = 0;
$ALPHA_BUBBLE_YES = 1;

$WOOD_WIDTH = 150;
$WOOD_PLANK_HEIGHT = 40;
$LEFT_WOOD_X = 2;
$RIGHT_WOOD_X = 488;
$BUBBLE_WOOD_Y = 33;
$NAV_WOOD_Y = 209;
$LEVELSET_WOOD_Y = 30;
$LEVEL_WOOD_Y = 249;
$HELP_WOOD_Y = 428;

$highlighted_option = '';
$previousx = -1;
$previousy = -1;
$displaying_dialog = '';
$deleted_current_levelset = 0;
$button_hold = 0;


#- ----------- bubbles processing/drawing -----------------------------------------

# subroutine to calculate the left corner x of the given bubble option column (based on 0 start)
sub bubble_optionx {
    my ($col) = @_;
    return $BUBBLE_OPTION_INIT_X + $col * ($BUBBLE_SIZE + $BUBBLE_OPTION_SEPARATION);
}

# subroutine to calculate the left corner y of the given bubble option row (based on 0 start)
sub bubble_optiony {
    my ($row) = @_;
    return $BUBBLE_WOOD_Y + $WOOD_PLANK_HEIGHT + $row * ($BUBBLE_SIZE + $BUBBLE_OPTION_SEPARATION);
}

# subroutine to get the column
sub get_col {
    my ($x, $y) = @_;
    if (even(get_row($y))) {
        return floor(($x-$POS_1P{p1}{left_limit})/$BUBBLE_SIZE);

    } elsif ($POS_1P{p1}{left_limit} + $BUBBLE_SIZE/2 <= $x && $x < $POS_1P{p1}{right_limit} - $BUBBLE_SIZE/2)  { 
        return floor(($x-($POS_1P{p1}{left_limit}+$BUBBLE_SIZE/2))/$BUBBLE_SIZE);

    } else {
        return -1;
    }
}

# subroutine to get the row
sub get_row {
    my ($y) = @_;
    return floor(($y-$POS_1P{p1}{top_limit})/$ROW_SIZE);
}

# subroutine to draw bubbles
sub draw_bubble {
    my ($bubbleid, $x, $y, $alpha, $surface_tmp, $ignore_update) = @_;
    my ($bubble);

    $surface_tmp or $surface_tmp = $app;
    $bubble = SDL::Surface->new(-name => "$FPATH/gfx/balls/bubble-".($colourblind && 'colourblind-')."$bubbleid.gif");

    $bubble_rects{$x}{$y} = SDL::Rect->new(-x => $x, '-y' => $y, -width => $bubble->width, -height => $bubble->height);

    $alpha and $bubble->set_alpha(SDL_SRCALPHA, 0x66);

    $bubble->blit(NULL, $surface_tmp, $bubble_rects{$x}{$y});
    $ignore_update or $surface_tmp->update($bubble_rects{$x}{$y});
}

# subroutine to erase bubble
sub erase_bubble {
    my ($x, $y) = @_;
    $background->blit($bubble_rects{$x}{$y}, $app, $bubble_rects{$x}{$y});
    #- redraw close bubbles because the rectangular blit of the previous statement erased a bit of them 
    my $DISTANCE_CLOSE_SQRED = sqr($BUBBLE_SIZE*1.1);
    foreach my $x_ (keys %bubble_rects) {
	foreach my $y_ (%{$bubble_rects{$x_}}) {
	    $y != $y_ && sqr($x-$x_) + sqr($y-$y_) <= $DISTANCE_CLOSE_SQRED or next;
	    if ($bubble_hash{$curr_level}{my $col = get_col($x_, $y_)}{my $row = get_row($y_)} =~ /^\d+$/) {
		draw_bubble($bubble_hash{$curr_level}{$col}{$row} + 1, $x_, $y_, $ALPHA_BUBBLE_NO, undef, 1);
	    }
	}
    }
    $app->update($bubble_rects{$x}{$y});
}

# subroutine to place a bubble
sub place_bubble {
    my ($x, $y, $alpha, $button) = @_;
    my $col = get_col($x, $y);
    my $row = get_row($y);
    $y = $row * $ROW_SIZE + $POS_1P{p1}{top_limit};
    if ($col != -1) {
        if (even($row)) {
            $x = get_col($x, $y) * $BUBBLE_SIZE + $POS_1P{p1}{left_limit};
        } else  {
            $x = $col * $BUBBLE_SIZE + $POS_1P{p1}{left_limit} + $BUBBLE_SIZE/2;
        }
	if ($action eq 'erase' || $button >= 3) {  #- when in motion, the right button is reported as button 4 !?
            if (($previousx != $x || $previousy != $y) && $previousx != -1 && $previousy != -1
		&& $bubble_hash{$curr_level}{get_col($previousx, $previousy)}{get_row($previousy)} ne '-') {
                draw_bubble($bubble_hash{$curr_level}{get_col($previousx, $previousy)}{get_row($previousy)} + 1,
			    $previousx, $previousy, $ALPHA_BUBBLE_NO);
            }
	    if ($bubble_rects{$x}{$y}) {
		if ($alpha && $bubble_hash{$curr_level}{$col}{$row} ne '-') {
		    if ($previousx != $x || $previousy != $y) {
			erase_bubble($x, $y);
			draw_bubble($bubble_hash{$curr_level}{$col}{$row} + 1, $x, $y, $alpha);
		    }
		    $previousx = $x;
		    $previousy = $y;
		} else {
		    $bubble_hash{$curr_level}{$col}{$row} = '-';
		    erase_bubble($x, $y);
		}
            }
        } elsif ($action eq 'add') {
            if ($alpha) {
                if ($previousx != $x || $previousy != $y) {
                    if ($previousx != -1 && $previousy != -1) {
                        if ($bubble_hash{$curr_level}{get_col($previousx, $previousy)}{get_row($previousy)} eq '-') {
                            erase_bubble($previousx, $previousy);
                        } else {
                            draw_bubble($bubble_hash{$curr_level}{get_col($previousx, $previousy)}{get_row($previousy)} + 1,
					$previousx, $previousy, $ALPHA_BUBBLE_NO);
                        }
                    }
                    draw_bubble($color, $x, $y, $alpha);
                    $previousx = $x;
                    $previousy = $y;
                }
            } else {
                $bubble_hash{$curr_level}{$col}{$row} = $color - 1;
                draw_bubble($color, $x, $y, $alpha);
            }
	}
    }
}


#- ----------- actions routing -----------------------------------------

# subroutine to change my color
sub change_color {
    my ($new_color) = @_;
    $color = $new_color;
    $action = 'add';

    draw_bubble($color,
		$POS_1P{p1}{next_bubble}{x} + $POS_1P{p1}{left_limit},
		$POS_1P{p1}{next_bubble}{y}, $ALPHA_BUBBLE_NO);    #- }}})
}

sub highlight_option {
    my ($option, $x, $y) = @_;

	unhighlight_option($option);
    if ($option ne $highlighted_option) {
        $highlighted_option = $option;
        $option =~ s/bubble-(\d+)/$1/;

        if (0 < $option && $option <= $NUM_BUBBLES_AVAIL) {
            $highlight->blit($rect{bubble_option_highlight}, $app, $bubble_rects{$x}{$y});
            $app->update($bubble_rects{$x}{$y});

        } elsif ($option eq 'erase') {
            $highlight->blit($rect{bubble_option_highlight}, $app, $rect{erase});
            $app->update($rect{erase});

        } elsif ($option =~ m/arrow/){
            eval "print_dialog_$option(1)";

        } else {
            eval "print_$option".'_text(1)';
        }
    }

}

sub unhighlight_option {
    # note: will only have x and y for bubbles and erase
    my ($no_highlight) = @_;
    my ($col, $row);

    # don't unhighlight currently highlighted option because it will cause flashing
    if ($highlighted_option ne '' && $highlighted_option ne $no_highlight) {
        $highlighted_option =~ s/bubble-(\d+)/$1/;
        if (0 < $highlighted_option && $highlighted_option <= $NUM_BUBBLES_AVAIL) {
            $col = ($highlighted_option - 1 ) % $BUBBLES_PER_ROW;
            $row = floor(($highlighted_option - 1 ) / $BUBBLES_PER_ROW);

	    my $rect = $bubble_rects{bubble_optionx($col)}{bubble_optiony($row)};
            $background->blit($rect, $app, $rect);
            $app->update($rect);
            
            add_bubble_option($highlighted_option, $col, $row);
    
        } elsif ($highlighted_option eq 'erase') {
            $background->blit($rect{erase}, $app, $rect{erase});
            $app->update($rect{erase});
            
            add_erase_option();
                                  
        } elsif ($highlighted_option =~ m/arrow/) {
            eval "print_dialog_$highlighted_option(0)";

        } else {
            eval "print_$highlighted_option".'_text(0)';
        }

        $highlighted_option = '';
    }

}

# subroutine to decide what my mouse is telling me to do
sub choose_action {
    my ($x, $y, $caller, $button) = @_;

    # are we over the drawing area?
    if ($POS_1P{p1}{left_limit} <= $x && $x < $POS_1P{p1}{right_limit} && $POS_1P{p1}{top_limit} <= $y && $y < $POS_1P{bottom_limit}) {
        if ($caller eq 'motion' && $button_hold == 0) {
            place_bubble($x, $y, $ALPHA_BUBBLE_YES, $button);
        } elsif ($button_hold == 1) {
            place_bubble($x, $y, $ALPHA_BUBBLE_NO, $button);
            $modified_levelset = 1;
        } else { # $caller is 'button'
            place_bubble($x, $y, $ALPHA_BUBBLE_NO, $button);
            $modified_levelset = 1;
        }

    # we will want to remove bubble highlight if we go out of our drawing area
    } elsif ($previousx != -1 && $previousy != -1) {
        if ($bubble_hash{$curr_level}{get_col($previousx, $previousy)}{get_row($previousy)} eq '-') {
            erase_bubble($previousx, $previousy);
        } else {
            draw_bubble($bubble_hash{$curr_level}{get_col($previousx, $previousy)}{get_row($previousy)} + 1,
			$previousx, $previousy, $ALPHA_BUBBLE_NO);
        }
        # make sure that when we come back into the drawing area, we immediatly start
        # doing our highlights - if we don't do this, you don't get a highlight
        # if you come back to the same spot that you left
        $previousx = -1;
        $previousy = -1;
    }
   
    # selecting a bubble or erase bubble??
    if ($y >= $BUBBLE_WOOD_Y + $WOOD_PLANK_HEIGHT && $y <= $BUBBLE_WOOD_Y + 4 * $WOOD_PLANK_HEIGHT
	&& $x > $BUBBLE_OPTION_INIT_X - $BUBBLE_OPTION_SEPARATION/2
	&& $x <= $BUBBLE_OPTION_INIT_X + $BUBBLES_PER_ROW * ($BUBBLE_SIZE + $BUBBLE_OPTION_SEPARATION) - $BUBBLE_OPTION_SEPARATION/2) {
        my $col = ceil(($x - $BUBBLE_OPTION_INIT_X + $BUBBLE_OPTION_SEPARATION/2) / ($BUBBLE_SIZE + $BUBBLE_OPTION_SEPARATION));
        my $row = ceil(($y - ($BUBBLE_WOOD_Y + $WOOD_PLANK_HEIGHT) + $BUBBLE_OPTION_SEPARATION/2) / ($BUBBLE_SIZE + $BUBBLE_OPTION_SEPARATION));
        
        my $color_tmp = $BUBBLES_PER_ROW * ($row - 1) + $col;
        if (0 < $color_tmp && $color_tmp <= $NUM_BUBBLES_AVAIL) {
            highlight_option("bubble-$color_tmp", bubble_optionx($col - 1), bubble_optiony($row - 1));
            $caller eq 'button' and change_color($color_tmp);
        } elsif ($color_tmp == $NUM_BUBBLES_AVAIL + 1) {
            highlight_option('erase');
            if ($caller eq 'button') {
                $action = 'erase';
                erase_bubble($POS_1P{p1}{next_bubble}{x} + $POS_1P{p1}{left_limit}, $POS_1P{p1}{next_bubble}{'y'});
            }
        }

    # check if over navigation options
    } elsif ($LEFT_WOOD_X <= $x && $x <= $WOOD_WIDTH && $rect{prev}->y <= $y && $y <= $rect{last}->y + $rect{last}->height) {
	my @nav_options = ({ name => 'prev',
			     unhighlight => $curr_level == 1,
			     action => sub { if ($curr_level != 1) { 
				                 prev_level();
						 $curr_level == 1 and unhighlight_option();
					     } } },
			   { name => 'next',
			     unhighlight => $curr_level == keys %bubble_hash,
			     action => sub { if ($curr_level != keys %bubble_hash) {
				                 next_level();
						 $curr_level == keys %bubble_hash and unhighlight_option();
					     } } },
			   { name => 'first',
			     unhighlight => $curr_level == 1,
			     action => sub { if ($curr_level != 1) {
				                 first_level();
						 unhighlight_option();
					     } } },
			   { name => 'last',
			     unhighlight => $curr_level == keys %bubble_hash,
			     action => sub { if ($curr_level != keys %bubble_hash) {
				                 last_level();
						 unhighlight_option();
					     } } },
		       );

	foreach (@nav_options) {
	    if ($rect{$_->{name}}->y <= $y && $y <= $rect{$_->{name}}->y + $rect{$_->{name}}->height) {
		if ($_->{unhighlight}) {
		    unhighlight_option();
		} else {
		    highlight_option($_->{name});
		}
		$caller eq 'button' and $_->{action}->();
	    }
	}

    # check if over levelset options
    } elsif ($RIGHT_WOOD_X <= $x && $x <= $RIGHT_WOOD_X + $WOOD_WIDTH
	     && $y >= $rect{ls_new}->y && $y <= $rect{ls_delete}->y + $rect{ls_delete}->height) {
	my @ls_options = ({ name => 'ls_new',    action => sub { create_new_levelset_dialog() } },
			  { name => 'ls_open',   action => sub { create_open_levelset_dialog() } },
			  { name => 'ls_save',   action => sub { save_file() } },
			  { name => 'ls_delete', action => sub { create_delete_levelset_dialog() } });
	foreach (@ls_options) {
	    if ($y >= $rect{$_->{name}}->y && $y <= $rect{$_->{name}}->y + $rect{$_->{name}}->height) {
		highlight_option($_->{name});
		$caller eq 'button' and $_->{action}->();
	    }
	}

    # check if over level options
    } elsif ($RIGHT_WOOD_X <= $x && $x <= $RIGHT_WOOD_X + $WOOD_WIDTH
	     && $y >= $rect{lvl_insert}->y && $y <= $rect{lvl_delete}->y + $rect{lvl_delete}->height) {
	my @lvl_options = ({ name => 'lvl_insert', action => sub { insert_level() } },
			   { name => 'lvl_append', action => sub { append_level() } },
			   { name => 'lvl_delete', action => sub { delete_level(); load_level() } });
	foreach (@lvl_options) {
	    if ($y >= $rect{$_->{name}}->y && $y <= $rect{$_->{name}}->y + $rect{$_->{name}}->height) {
		highlight_option($_->{name});
		$caller eq 'button' and $_->{action}->();
	    }
	}

    # check if over help
    } elsif ($RIGHT_WOOD_X <= $x && $x <= $RIGHT_WOOD_X + $WOOD_WIDTH
             && $y >= $rect{help}->y && $y <= $rect{help}->y + $rect{help}->height) {
		     
        if ($caller eq 'button') {
            create_help_dialog();
        }
        else {
            highlight_option('help');
        }
        
    # not over an option so I may need to unhighlight
    } else {
        unhighlight_option();
    }

}

# subroutine to return the list of levelsets in $FBLEVELS
sub get_levelset_list {
    my @levelsets = sort(my @dummy = all($FBLEVELS));
    $displaying_dialog eq 'ls_delete' and @levelsets = difference2(\@levelsets, [ 'default-levelset' ]);
    return @levelsets;
}

sub betw {
    my ($val, $min, $max) = @_;
    $val > $min && $val < $max;
}

# subroutine to decide what my mouse is telling me to do in the dialog box
sub choose_dialog_action {
    my ($x, $y, $caller, $event) = @_;
    my ($ok_rect, $cancel_rect, $surface_tmp);
    
    # todo - can we get this info somewhere else in a better way?
    $surface_tmp = SDL::Surface->new(-name => "$FPATH/gfx/list_arrow_up.png");

    $rect{middle} = get_dialog_rect();
    # over left button
    if (betw($x, $rect{middle}->x, $rect{middle}->x + $rect{middle}->width/2)
	&& betw($y, $rect{middle}->y + 6 * $WOOD_PLANK_HEIGHT, $rect{middle}->y + $rect{middle}->height)) {
	if (member($displaying_dialog, qw(help ls_play ls_play_choose_level ls_nothing_to_delete ls_open_ok_only ls_new_ok_only))) {
	    # this dialog does not have a left button. return
	    unhighlight_option();
	    return 1;
	}

	if ($displaying_dialog eq 'jump') {
            if ( is_ok_jump_value() == 1 ) {
                highlight_option('ok');
            } else {
                unhighlight_option('ok');
                return 1;
            }
	}

	if ($displaying_dialog eq 'ls_new') {
            if ( is_ok_filename() == 1) {
	    	highlight_option('ok');
            } else {
	    	unhighlight_option('ok');
                return 1;
	    }
	}
	
	$displaying_dialog ne 'ls_new' and highlight_option('ok');

	
	if ($caller eq 'button') {
	    if ($displaying_dialog eq 'ls_new' && is_ok_filename() == 1) {
		remove_dialog();
		create_new_levelset();
            } elsif ($displaying_dialog eq 'jump' && is_ok_jump_value() == 1) {
		remove_dialog();
                jump_to_level($jump_to_level_value);
	    } elsif ($displaying_dialog eq 'ls_open') {
		open_levelset();
	    } elsif ($displaying_dialog eq 'ls_delete') {
		delete_levelset();
	    } elsif ($displaying_dialog eq 'ls_deleted_current') {
		create_open_levelset_dialog_ok_only();
	    } elsif ($displaying_dialog eq 'ls_save_changes') {
		save_file();
		$displaying_dialog = '';
		eval($modified_levelset_action);
	    }
	}

	# over right button
    } elsif (betw($x, $rect{middle}->x + $rect{middle}->width/2, $rect{middle}->x + $rect{middle}->width)
	     && betw($y, $rect{middle}->y + 6 * $WOOD_PLANK_HEIGHT, $rect{middle}->y + $rect{middle}->height)) {
	if (member($displaying_dialog, qw(help ls_play ls_play_choose_level ls_nothing_to_delete ls_open_ok_only ls_new_ok_only))) {
            if ($displaying_dialog eq 'ls_new_ok_only' && is_ok_filename() == 1) {
                highlight_option('ok_right');
            } else {
                unhighlight_option('ok_right');
            }

            if ($displaying_dialog eq 'ls_nothing_to_delete') {
                highlight_option('ok_right');
                if ($caller eq 'button') {
                    $displaying_dialog = '';
                    remove_dialog();
                }
            }

            $displaying_dialog ne 'ls_new_ok_only' and highlight_option('ok_right');

	    if ($caller eq 'button') {
                if ($displaying_dialog eq 'help') {
                    $displaying_dialog = '';
				remove_dialog();
                }
		if (member($displaying_dialog, qw(ls_play ls_play_choose_level))) {
		    my @levelsets = get_levelset_list();
		    $modified_levelset_action = "return $levelsets[$list_browser_highlight_offset]";
		    return 1;

		} elsif ($displaying_dialog eq 'ls_open_ok_only') {
		    remove_dialog();
                    $displaying_dialog = '';
                    open_levelset();

		} elsif ($displaying_dialog eq 'ls_new_ok_only' && is_ok_filename() == 1) {
                    remove_dialog();
                    create_new_levelset();
                }
	    }
	} else {
		# still over right button, but for these dialogs, it is the cancel button
	    highlight_option('cancel');
	    if ($caller eq 'button') {
		if ($displaying_dialog eq 'ls_open' && $deleted_current_levelset == 1) {
		    remove_dialog();
		    create_deleted_current_levelset_dialog();

		} elsif ($displaying_dialog eq 'ls_deleted_current') {
		    $levelset_name = 'default-levelset';
		    %bubble_hash = read_file($levelset_name);
		    $curr_level = 1;
                    $displaying_dialog = '';
                    remove_dialog();
                    load_level();
                    print_levelset_name();
                    $deleted_current_levelset = 0;

		} elsif ($displaying_dialog eq 'ls_save_changes') {
                    $displaying_dialog = '';
		    eval($modified_levelset_action);

		} else {
			# all other dialogs
		    remove_dialog();
		}
	    }
	}

    } elsif (member($displaying_dialog, qw(ls_open_ok_only ls_open ls_delete ls_play ls_play_choose_level))) {
	if (betw($x, $rect{middle}->x + 4 * $rect{middle}->width/6, $rect{middle}->x + 4 * $rect{middle}->width/6 + $surface_tmp->width)) {
	    my @arrows = ($rect{dialog_file_list}->y + 2,
			  $rect{dialog_file_list}->y + $rect{dialog_file_list}->height - $surface_tmp->height - 2);
	    if (betw($y, $arrows[0], $arrows[0] + $surface_tmp->height)) {
		$caller eq 'button' and display_levelset_list_browser($list_browser_file_start_offset - 1, $list_browser_highlight_offset);
		highlight_option('list_arrow_up');

	    } elsif (betw($y, $arrows[1], $arrows[1] + $surface_tmp->height)) {
		$caller eq 'button' and display_levelset_list_browser($list_browser_file_start_offset + 1, $list_browser_highlight_offset);
		highlight_option('list_arrow_down');

	    } else {
		unhighlight_option();
	    }
	} elsif (betw($x, $rect{dialog_file_list}->x, $rect{dialog_file_list}->x + $rect{dialog_file_list}->width)
		 && betw($y, $rect{dialog_file_list}->y, $rect{dialog_file_list}->y + $rect{dialog_file_list}->height)) {
	    if ($caller eq 'button') {
		if ($y < $rect{dialog_file_list}->y + 25) {
		    display_levelset_list_browser($list_browser_file_start_offset, $list_browser_file_start_offset);
		} elsif ($y < $rect{dialog_file_list}->y + 2 * 25) {
		    display_levelset_list_browser($list_browser_file_start_offset, $list_browser_file_start_offset + 1);
		} elsif ($y < $rect{dialog_file_list}->y + 3 * 25) {
		    display_levelset_list_browser($list_browser_file_start_offset, $list_browser_file_start_offset + 2);
		} else {
		    display_levelset_list_browser($list_browser_file_start_offset, $list_browser_file_start_offset + 3);
		}
		if ($displaying_dialog eq 'ls_play_choose_level') {
                    #- we've potentially selected another level. Make sure the start level
                    #- that was previously selected is valid
                    if (is_ok_select_start_value($start_level) == 0) {
                        #- we're over (since we can't be under) so go to the last
                        #- level in this new set
                        $start_level = $file_browser_levelsets_num_levels[$list_browser_highlight_offset];	
                        show_selected_level();
                    }
                    
		}
	    }
        } elsif ($displaying_dialog eq 'ls_play_choose_level' && betw($x, 435, 470)) {
            my $more = $x > 452 ? '_more' : '';
            if (betw($y, $rect{middle}->y + 180, $rect{middle}->y + 200)) {
                highlight_option("select_level_arrow_up$more");
                if ($caller eq 'button') {
                    modify_selected_level($event, "up$more");
                }
            } elsif (betw($y, $rect{middle}->y + 202, $rect{middle}->y + 222)) {
                highlight_option("select_level_arrow_down$more");
                if ($caller eq 'button') {
                    modify_selected_level($event, "down$more");
                }
            } else {
                unhighlight_option();
            }
        } else {
            unhighlight_option();
        }
    } else {
	unhighlight_option();
    }
}

# react to user's keyboard and mouse events
sub handle_events {
    my $event = SDL::Event->new;

    while (1) {
        $event->pump;
        if ($event->poll != 0) {
    
            if ($event->type == SDL_MOUSEMOTION) {
                if ($displaying_dialog eq '') {
                    choose_action($event->button_x, $event->button_y, 'motion', $event->button);  #- , )
                } else {
                    choose_dialog_action($event->button_x, $event->button_y, 'motion');  #- ,, )
                }
                $app->flip;

            } elsif ($event->type == SDL_MOUSEBUTTONDOWN) {
                $button_hold = 1;
                if ($displaying_dialog eq '') {
                    choose_action($event->button_x, $event->button_y, 'button', $event->button);  #- , )
                } else {
                    choose_dialog_action($event->button_x, $event->button_y, 'button', $event);  #- ,, )
                }
                $app->flip;

            } elsif ($event->type == SDL_MOUSEBUTTONUP) {
                $button_hold = 0;

            } elsif ($event->type == SDL_KEYDOWN) {
                if ($displaying_dialog eq '') {
                    if ($event->key_sym == SDLK_ESCAPE() || $event->key_sym == SDLK_q() ) {
                        if ($modified_levelset == 1) {
                            $modified_levelset_action = '$modified_levelset_action = "return 1"';
                            create_save_changes_dialog();
                        } else {
                            return 1;
                        }
                    }
                    $event->key_sym == SDLK_LEFT() and prev_level();
                    $event->key_sym == SDLK_RIGHT() and next_level();
                    $event->key_sym == SDLK_UP() and first_level();
                    $event->key_sym == SDLK_DOWN() and last_level();
                    $event->key_sym == SDLK_a() and append_level();
                    $event->key_sym == SDLK_d() and do { delete_level(); FBLE::load_level() };
                    $event->key_sym == SDLK_f() and $app->fullscreen;
                    $event->key_sym == SDLK_h() and prev_level();
                    $event->key_sym == SDLK_i() and insert_level();
                    $event->key_sym == SDLK_l() and next_level();
                    $event->key_sym == SDLK_n() and next_level();
                    $event->key_sym == SDLK_o() and create_open_levelset_dialog();
                    $event->key_sym == SDLK_p() and prev_level();
                    $event->key_sym == SDLK_s() and save_file();
                    $event->key_sym == SDLK_RIGHTBRACKET() and move_level_right();
                    $event->key_sym == SDLK_LEFTBRACKET() and move_level_left();
                    $event->key_sym == SDLK_F1() and create_help_dialog();
                    $event->key_sym == SDLK_j() and create_jump_to_level_dialog(); 
		    if ((($highlighted_option eq 'prev' || $highlighted_option eq 'first') && $curr_level == 1)
			|| (($highlighted_option eq 'next' || $highlighted_option eq 'last') && $curr_level == keys %bubble_hash)) {
			unhighlight_option();
		    }
                } elsif (member($displaying_dialog, qw(ls_new ls_new_ok_only))) {
                    print_new_ls_name($event->key_sym);
                } elsif (member($displaying_dialog, qw(jump))) {
                    print_jump_to_level_value($event->key_sym);
                } elsif ($displaying_dialog eq 'ls_open') {
                    if ($event->key_sym() == SDLK_RETURN() || $event->key_sym() == SDLK_KP_ENTER()) {
                        highlight_option('ok');
                        $app->delay(200);
                        open_levelset();
                    } elsif ($event->key_sym() == SDLK_ESCAPE()) {
                        highlight_option('cancel');
                        $app->delay(200);
                        remove_dialog();
                        if ($deleted_current_levelset == 1) {
                            create_deleted_current_levelset_dialog();
                        }
                    } elsif ($event->key_sym() == SDLK_DOWN()) {
                        display_levelset_list_browser($FBLE::list_browser_file_start_offset + 1, $FBLE::list_browser_highlight_offset + 1);
                    } elsif ($event->key_sym() == SDLK_UP()) {
                        display_levelset_list_browser($FBLE::list_browser_file_start_offset - 1, $FBLE::list_browser_highlight_offset - 1);
		    }
                } elsif ($displaying_dialog eq 'ls_open_ok_only') {
                    if ($event->key_sym() == SDLK_RETURN() || $event->key_sym() == SDLK_KP_ENTER()) {
                        highlight_option('ok_right');
                        $app->delay(200);
                        open_levelset();
                    } elsif ($event->key_sym() == SDLK_DOWN()) {
                        display_levelset_list_browser($FBLE::list_browser_file_start_offset + 1, $FBLE::list_browser_highlight_offset + 1);
                    } elsif ($event->key_sym() == SDLK_UP()) {
                        display_levelset_list_browser($FBLE::list_browser_file_start_offset - 1, $FBLE::list_browser_highlight_offset - 1);
                    }
                } elsif ($displaying_dialog eq 'help') {
                    if ($event->key_sym() == SDLK_RETURN() || $event->key_sym() == SDLK_KP_ENTER()) {
                        highlight_option('ok_right');
                        $app->delay(200);
                        remove_dialog();
                    }
                    
                } elsif (member($displaying_dialog, qw(ls_play ls_play_choose_level))) {
                    if ($event->key_sym == SDLK_ESCAPE() || $event->key_sym == SDLK_q() ) {
                        $displaying_dialog = '';
                        return;
                    }
                    if ($event->key_sym == SDLK_RETURN() || $event->key_sym == SDLK_KP_ENTER()) {
                        highlight_option('ok_right');
                        $app->delay(200);
                        my (@levelsets);
                        @levelsets = get_levelset_list();
                        $displaying_dialog = '';
                        my @retval = ($levelsets[$list_browser_highlight_offset], $start_level);
                        return @retval;
                    } elsif ($event->key_sym() == SDLK_DOWN()) {
                        display_levelset_list_browser($FBLE::list_browser_file_start_offset + 1, $FBLE::list_browser_highlight_offset + 1);
                        if (is_ok_select_start_value($start_level) == 0) {
                            #- we're over (since we can't be under) so go to the last
                            #- level in this new set
                            $start_level = $file_browser_levelsets_num_levels[$list_browser_highlight_offset];	
                            if ($displaying_dialog eq 'ls_play_choose_level') {
                                show_selected_level();
                            }
                        }
                    } elsif ($event->key_sym() == SDLK_UP()) {
                        display_levelset_list_browser($FBLE::list_browser_file_start_offset - 1, $FBLE::list_browser_highlight_offset - 1);
                        if (is_ok_select_start_value($start_level) == 0) {
                            #- we're over (since we can't be under) so go to the last
                            #- level in this new set
                            $start_level = $file_browser_levelsets_num_levels[$list_browser_highlight_offset];	
                            if ($displaying_dialog eq 'ls_play_choose_level') {
                                show_selected_level();
                            }
                        }
                    } elsif ($event->key_sym() == SDLK_LEFT()) {
                        modify_selected_level($event, 'down');
                    } elsif ($event->key_sym() == SDLK_RIGHT()) {
                        modify_selected_level($event, 'up');
                    }

                } elsif ($displaying_dialog eq 'ls_delete') {
                    if ($event->key_sym() == SDLK_RETURN() || $event->key_sym() == SDLK_KP_ENTER()) {
                        highlight_option('ok');
                        $app->delay(200);
                        delete_levelset();
                    } elsif ($event->key_sym() == SDLK_ESCAPE()) {
                        highlight_option('cancel');
                        $app->delay(200);
                        remove_dialog();
                    } elsif ($event->key_sym() == SDLK_DOWN()) {
                        display_levelset_list_browser($FBLE::list_browser_file_start_offset + 1, $FBLE::list_browser_highlight_offset + 1);
                    } elsif ($event->key_sym() == SDLK_UP()) {
                        display_levelset_list_browser($FBLE::list_browser_file_start_offset - 1, $FBLE::list_browser_highlight_offset - 1);
                    }
                } elsif ($displaying_dialog eq 'ls_deleted_current') {
                    if ($event->key_sym() == SDLK_RETURN() || $event->key_sym() == SDLK_KP_ENTER() ) {
                        highlight_option('ok');
                        $app->delay(200);
                        remove_dialog();
                        create_open_levelset_dialog_ok_only();
                    } elsif ($event->key_sym() == SDLK_ESCAPE()) {
                        highlight_option('cancel');
                        $app->delay(200);
                        $levelset_name = 'default-levelset';
                        %bubble_hash = read_file($levelset_name);
                        $curr_level = 1;
                        $displaying_dialog = '';
                        remove_dialog();
                        load_level();
                        print_levelset_name();
                        $deleted_current_levelset = 0;
                    }
                } elsif ($displaying_dialog eq 'ls_nothing_to_delete') {
                    if ($event->key_sym() == SDLK_RETURN() || $event->key_sym() == SDLK_KP_ENTER()) {
                        highlight_option('ok_right');
                        $app->delay(200);
                        $displaying_dialog = '';
                        remove_dialog();
                    }
                } elsif ($displaying_dialog eq 'ls_save_changes') {
                    if ($event->key_sym() == SDLK_RETURN() || $event->key_sym() == SDLK_KP_ENTER() ) {
                        highlight_option('ok');
                        $app->delay(200);
                        save_file();
                        $displaying_dialog = '';
                        eval($modified_levelset_action);
                    } elsif ($event->key_sym() == SDLK_ESCAPE()) {
                        highlight_option('cancel');
                        $app->delay(200);
                        $displaying_dialog = '';
                        eval($modified_levelset_action);
                    }
                }
        
                $app->flip;

            } elsif ($event->type == SDL_QUIT) {
                if ($displaying_dialog eq '') {
                    if ($modified_levelset == 1) {
                        $modified_levelset_action = '$modified_levelset_action = "return 1"';
                        create_save_changes_dialog();
                        $app->flip;
                    } else {
                        return 1;
                    }
                }
            }

            if ($modified_levelset_action =~ /return (\S*)/ && $displaying_dialog ne 'ls_save_changes') {
                $modified_levelset_action = '';
                if ($displaying_dialog eq 'ls_play_choose_level') {
                    #- hokey, but I have to return an array here
                    $displaying_dialog = '';
                    return ($1, $start_level);
                } else {
                    $displaying_dialog = '';
                    return $1;
                }
            }
            
        } else { 
            $app->delay(1);
        }

    }
}


#- ----------- dialogs -----------------------------------------

# subroutine to get the rect where the promt will go
sub get_dialog_rect {
    SDL::Rect->new(-x => $background->width/2 - $surface_dialog->width/2,
		   '-y' => $background->height/2 - $surface_dialog->height/2,
		   -width => $surface_dialog->width, -height => $surface_dialog->height);
}

sub create_dialog_base {
    my ($title_text) = @_;

    unhighlight_option();
    if ($displaying_dialog eq 'help') {
    	$surface_dialog = SDL::Surface->new(-name => "$FPATH/gfx/key_shortcuts.png");
    } else {
        $surface_dialog = SDL::Surface->new(-name => "$FPATH/gfx/menu/void_panel.png");
    }
    $rect{dialog} = SDL::Rect->new(-x => 0, '-y' => 0, -width => $surface_dialog->width, -height => $surface_dialog->height);
    $rect{middle} = get_dialog_rect();
    
    $surface_dialog->blit($rect{dialog}, $app, $rect{middle});
    
    $app->print($rect{middle}->x + $rect{middle}->width/2 - 12 * length($title_text)/2, $rect{middle}->y + 5, uc($title_text));
}

# sub to create a blank dialog on the screen
sub create_dialog {
    my ($title_text) = @_;
    create_dialog_base($title_text);
    print_cancel_text(0);
    print_ok_text(0);

}

sub remove_dialog {
    $rect{middle} = SDL::Rect->new(-x => $background->width/2 - $surface_dialog->width/2,
				   '-y' => $background->height/2 - $surface_dialog->height/2,
				   -width => $surface_dialog->width, -height => $surface_dialog->height);
    $background->blit($rect{middle}, $app, $rect{middle});
    $app->flip;

    # update the screen
    load_level();
    $displaying_dialog = '';
}

# subroutine to ask the user what to do if they delete the current levelset
sub create_deleted_current_levelset_dialog {
    $displaying_dialog = 'ls_deleted_current';
    $deleted_current_levelset = 1; 
    create_dialog('DELETED CURRENT LEVELSET');
    $rect{middle} = get_dialog_rect();
    $app->print($rect{middle}->x + 25, $rect{middle}->y + 15 + $WOOD_PLANK_HEIGHT, "PRESS \"OK\" TO CHOOSE");
    $app->print($rect{middle}->x + 25, $rect{middle}->y + 35 + $WOOD_PLANK_HEIGHT, "ANOTHER LEVELSET TO OPEN");
    $app->print($rect{middle}->x + 25, $rect{middle}->y + 3 * $WOOD_PLANK_HEIGHT, "PRESS \"CANCEL\" TO OPEN");
    $app->print($rect{middle}->x + 25, $rect{middle}->y + 25 + 3* $WOOD_PLANK_HEIGHT, "THE DEFAULT LEVELSET");

}

# subroutine to create a delete levelset dialog
sub create_delete_levelset_dialog {
    if (all($FBLEVELS) > 1) {
        $displaying_dialog = 'ls_delete';
        create_dialog('SELECT LEVELSET TO DELETE');
        $list_browser_highlight_offset = -1;
        $list_browser_file_start_offset = -1; 
        display_levelset_list_browser(0, 0);
    } else {
        $displaying_dialog = 'ls_nothing_to_delete';
        create_ok_dialog('NO LEVELSET TO DELETE');
        $rect{middle} = get_dialog_rect();
        $app->print($rect{middle}->x + 50, $rect{middle}->y + 30 + $WOOD_PLANK_HEIGHT, "THERE ARE NO CUSTOM"); 
        $app->print($rect{middle}->x + 50, $rect{middle}->y + 55 + $WOOD_PLANK_HEIGHT, "LEVELSETS TO DELETE.");
        $app->print($rect{middle}->x + 40, $rect{middle}->y + 125 + $WOOD_PLANK_HEIGHT, "PRESS \"OK\" TO CONTINUE");
    }
}


#subroutine to display the help dialog. 
sub create_help_dialog {
    $displaying_dialog = 'help';
    create_ok_dialog("HELP - KEY SHORTCUTS");
}


# subroutine to create a jump to level diaplog. This dialog asks the user what level they want to go directly to
sub create_jump_to_level_dialog {
    $jump_to_level_value = '';
    $displaying_dialog = 'jump';
    create_dialog("ENTER LEVEL TO JUMP TO");	
}

# subroutine to create a new levelset dialog. This dialog asks for the name of the new levelset
sub create_new_levelset_dialog {
    if ($modified_levelset == 1) {
        $modified_levelset_action = 'create_new_levelset_dialog_ok_only()';
        create_save_changes_dialog();
    } else {
        $displaying_dialog = 'ls_new';
        # create the blank dialog with the title of "enter new levelset name"
        create_dialog('ENTER NEW LEVELSET NAME');
        # inialize the new levelset name
        $new_ls_name_text = '';
    }

}

sub create_new_levelset_dialog_ok_only {
    $displaying_dialog = 'ls_new_ok_only';
    create_ok_dialog('ENTER NEW LEVELSET NAME');
    $new_ls_name_text = '';
}

# sub to create a blank dialog on the screen
sub create_ok_dialog {
    my ($title_text) = @_;
    create_dialog_base($title_text);
    print_ok_right_text(0);

}

sub create_open_levelset_dialog {
    $start_level = undef;
    if ($modified_levelset == 1) {
        $modified_levelset_action = 'create_open_levelset_dialog_ok_only()';
        create_save_changes_dialog();
    } else {
        $displaying_dialog = 'ls_open';
        create_dialog('SELECT LEVELSET TO OPEN');
        $list_browser_highlight_offset = -1;
        $list_browser_file_start_offset = -1; 
        display_levelset_list_browser(0,0);
    }
}

sub create_open_levelset_dialog_ok_only {

    $displaying_dialog = 'ls_open_ok_only';
    create_ok_dialog('SELECT LEVELSET TO OPEN');
    $list_browser_highlight_offset = -1;
    $list_browser_file_start_offset = -1; 
    display_levelset_list_browser(0,0);

}

sub iter_rowscols(&) {
    my ($f) = @_;
    local ($::row, $::col);
    foreach $::row (0 .. $NUM_ROWS - 1) {
	foreach $::col (0 .. ($POS_1P{p1}{right_limit}-$POS_1P{p1}{left_limit})/$BUBBLE_SIZE - 1 - odd($::row)) {
	    &$f;
	}
    }
}

sub save_file {
    my @contents;
    foreach my $lev (1 .. keys %bubble_hash) {
	iter_rowscols {
	    if ($::col == 0) {
		($lev == 1 && $::row == 0) or push @contents, "\n";
		odd($::row) and push @contents, "  ";
	    }
	    push @contents, "$bubble_hash{$lev}{$::col}{$::row}";
	    $::col+odd($::row) < 7 and push @contents, "   ";
        };
	push @contents, "\n";
    }
    output("$FBLEVELS/$levelset_name", @contents);
    $modified_levelset = 0;
}

sub create_play_levelset_dialog {
    my ($chooseStartingLevel, $defaultLevel) = @_;
    
    #initialize the start level to the default level 
    #this is only modified in ls_play_choose_level dialogs
    #but it is always referenced
    $start_level = $defaultLevel;
    
    #we do the check for $chooseStartingLevel twice because create_ok_dialog
    #needs to know the displaying levelset but display_level_selector
    #needs things that are set up in display_levelset_list_browser
    if ($chooseStartingLevel ==1 ) {
        $displaying_dialog = 'ls_play_choose_level';
    } else {
        $displaying_dialog = 'ls_play';
    }
    
    create_ok_dialog('SELECT LEVELSET TO PLAY');
    $list_browser_highlight_offset = -1;
    $list_browser_file_start_offset = -1; 
    display_levelset_list_browser(0, 0);
    if ($chooseStartingLevel == 1) {
        display_level_selector();
    }
}


sub create_save_changes_dialog {
    $modified_levelset = 0;
    #reset the modified levelset flag
    $displaying_dialog = 'ls_save_changes';
    create_dialog('SAVE CHANGES?');

    $rect{middle} = get_dialog_rect();

    # write out the instructions
    $app->print($rect{middle}->x + 25, $rect{middle}->y + $WOOD_PLANK_HEIGHT, 'THERE ARE UNSAVED CHANGES');
    $app->print($rect{middle}->x + 22, $rect{middle}->y + 35 + $WOOD_PLANK_HEIGHT, "PRESS \"OK\" TO SAVE");
    $app->print($rect{middle}->x + 22, $rect{middle}->y + 55 + $WOOD_PLANK_HEIGHT, "CHANGES AND CONTINUE");
    $app->print($rect{middle}->x + 22, $rect{middle}->y + 95 + $WOOD_PLANK_HEIGHT, "PRESS \"CANCEL\" TO CONTINUE");
    $app->print($rect{middle}->x + 22, $rect{middle}->y + 115 + $WOOD_PLANK_HEIGHT, "WITHOUT SAVING");
}

sub display_level_selector {
    
    $rect{middle} = get_dialog_rect();
    $app->print($rect{middle}->x + 15, $rect{middle}->y + 190, "START LEVEL:");
    $app->update($rect{middle});
    
    show_selected_level();
    print_dialog_select_level_arrow(0, 'down');
    print_dialog_select_level_arrow(0, 'up');
    print_dialog_select_level_arrow(0, 'down_more');
    print_dialog_select_level_arrow(0, 'up_more');
}

sub is_ok_modify_selected_level {
    my ($modification) = @_;
    
    if ($modification =~ /up/ && is_ok_select_start_value($start_level + 1)
        || $modification =~ /down/ && is_ok_select_start_value($start_level - 1)) {
        return 1;
    } else {
        return 0;
    }
}

sub modify_selected_level {
    
    my ($event, $modification) = @_;
    my $loops = 0;
    
    
    #loop until we get a keyup or a mouse up
    while (1) {
        $event->pump;
        if ($event->poll == 0 ) {
            if (is_ok_modify_selected_level($modification)) {
                if ($modification eq 'up') {
                    $start_level++;
                }
                if ($modification eq 'down') {
                    $start_level--;
                }
                if ($modification eq 'up_more') {
                    if (is_ok_select_start_value($start_level + 10)) {
                        $start_level += 10;
                    } else {
                        $start_level = $file_browser_levelsets_num_levels[$list_browser_highlight_offset];
                    }
                }
                if ($modification eq 'down_more') {
                    if (is_ok_select_start_value($start_level - 10)) {
                        $start_level -= 10;
                    } else {
                        $start_level = 1;
                    }
                }
                show_selected_level();

                #- need to unhighlight when we got at one extremity
                if ($modification =~ /up/ && $start_level == $file_browser_levelsets_num_levels[$list_browser_highlight_offset]
                    || $modification =~ /down/ && $start_level == 1) {
                    unhighlight_option();
                }

            }
			
			#no change in the event, delay and then try again
            if ($loops <= 5) {
				#special case here. If the user hits the keys fast, we need
				#to compensate for that. delay 100 and then check the key again
				#if it has changed, just exit. Otherwise, they're holding the
				#key down and we follow the logic as usual
                $app->delay(100);
                $event->pump;
                if ($event->poll == 0 || $event->type == SDL_MOUSEMOTION) { #mousemotion is when they are
                    #holding the mouse key down and
                    #jiggle it's position a litte bit
                    $app->delay(300);
                } else {
                    goto done;
                }

            } elsif ($loops <= 10) {
                $app->delay(150);
				
            } elsif ($loops <= 20) {
                $app->delay(80);

            } else {
                $app->delay(35);
            }

            $loops++;

        } else {
            if ($event->type == SDL_MOUSEMOTION) {
                #let them move the mouse around in the arrow that's already highlighted
                
                my $x = $event->button_x;
                my $y = $event->button_y;  #;;
                
                #if I'm outside of the x range, just exit
                if (!betw($x, 435, 470)) {
                    goto done;
                }
                
                if ($modification =~ /up/) {
                    if ( !betw($y, $rect{middle}->y + 180, $rect{middle}->y + 200) ) {
                        goto done;
                    }
                } else {
                    if ( !betw($y, $rect{middle}->y + 202, $rect{middle}->y + 222) ) {
                        goto done;
                    }
                }
                
            } else {
                goto done;
            }
        }
    }
    
  done:
    
}

#- from gentoo patch IIRC
sub SDL_TEXTWIDTH {
    if (defined(&SDL::App::SDL_TEXTWIDTH)) {
        SDL::App::SDL_TEXTWIDTH(@_);   # perl-sdl-1.x
    } else {
        SDL::SFont::SDL_TEXTWIDTH(@_); # perl-sdl-2.x
    }
}


sub show_selected_level {
    my $surf_select_level_background
      = SDL::Surface->new(-name => "$FPATH/gfx/select_level_background.png");

    $rect{select_level_background_src}
      = SDL::Rect->new(-width => $surf_select_level_background->width,
                       -height => $surf_select_level_background->height);
    
    $rect{select_level_background_dest}
      = SDL::Rect->new(-x => 305,
                       -y => $rect{middle}->y + 190,  #==
                       -width => $rect{select_level_background_src}->width,
                       -height => $rect{select_level_background_src}->height);
    
    $surf_select_level_background->blit($rect{select_level_background_src}, $app, $rect{select_level_background_dest});
    
    #now write the selected level
    $font = SDL::Font->new("$FPATH/gfx/font-hi.png");
    $app->print(427 - SDL_TEXTWIDTH($start_level), $rect{middle}->y + 190, $start_level);
    $font = SDL::Font->new("$FPATH/gfx/font.png");
    
    $app->update($rect{select_level_background_dest});

    display_levelset_screenshot();
}


# subroutine to display to the user a list of levelsets and allow them
# to browse through and select one of them.
sub display_levelset_list_browser {
    my ($file_start_offset, $file_highlight_offset) = @_;
    my ($surf_file_list_background, $surf_purple_highlight, $surf_scroll_list_background, $cnt);

    my @levelsets = get_levelset_list();
    my $do_scroll = $file_start_offset != $list_browser_file_start_offset;

    if ($file_highlight_offset > @levelsets - 1
	|| $file_highlight_offset == $list_browser_highlight_offset && !$do_scroll) {
        # this is the case where the user either clicks on the same
        # file that is already selected, or clicks in the file box, but
        # not on a file (for example, the user click on the second
        # file section when only one file is displayed
        return;
    }

    # we can display 4 files. If the offset makes us print less than 1, ignore it
    # also, make sure we don't let an offset of less than 0 go through
    if ($file_start_offset < @levelsets && $file_start_offset >= 0) {
        # save the current file offset
        $list_browser_file_start_offset = $file_start_offset;
    } else {
        # we don't need to draw anything. just exit
        return;
    }

    $rect{middle} = get_dialog_rect();
	#I want the font to be blue in the dialogs
	$font = SDL::Font->new("$FPATH/gfx/font-hi.png");
    $surf_file_list_background = SDL::Surface->new(-name => "$FPATH/gfx/file_list_background.png");

    $rect{list_box_src} = SDL::Rect->new(-width => $surf_file_list_background->width,
					 -height => 3 * $WOOD_PLANK_HEIGHT);
    
    # if the user is choosing the start level, we need to move things up a little bit to make
    # room for the choose level widget
    my $widgetMove = 0;
    if ($displaying_dialog eq 'ls_play_choose_level') {
        $widgetMove = -25;
    }
    $rect{dialog_file_list} = SDL::Rect->new(-x => $rect{middle}->x + 9, '-y' => $rect{middle}->y + $WOOD_PLANK_HEIGHT + 37 + $widgetMove,
					     -width => $rect{list_box_src}->width, -height => $rect{list_box_src}->height);

    $surf_purple_highlight = SDL::Surface->new(-name => "$FPATH/gfx/purple_hover.gif");

    $rect{purple_highlight_src} = SDL::Rect->new(-width => $surf_purple_highlight->width,
						 -height => $surf_purple_highlight->height);

    # we only want to draw the arrows and background here once, when we first get launched
    if ($list_browser_highlight_offset == -1) {
        $surf_scroll_list_background = SDL::Surface->new(-name => "$FPATH/gfx/scroll_list_background.png");

        $rect{scroll_list_background_src} = SDL::Rect->new(-width => $surf_scroll_list_background,
							   -height => 3 * $WOOD_PLANK_HEIGHT);
    
        $rect{scroll_list_background_dest} = SDL::Rect->new(-x => $rect{dialog_file_list}->x + $rect{dialog_file_list}->width,
							    '-y' => $rect{dialog_file_list}->y,
							    -width => $rect{scroll_list_background_src}->width,
							    -height => $rect{scroll_list_background_src}->height);

        $surf_scroll_list_background->blit($rect{scroll_list_background_src}, $app, $rect{scroll_list_background_dest});
        $app->update($rect{scroll_list_background_dest});
    
        print_dialog_list_arrow_down(0);
        print_dialog_list_arrow_up(0);
    }

    if ($do_scroll == 1) {
        $surf_file_list_background->blit($rect{list_box_src}, $app, $rect{dialog_file_list});
        $app->update($rect{dialog_file_list});

        for ($cnt = $file_start_offset; $cnt < $file_start_offset + 4; $cnt++) {
            if ($file_highlight_offset == $cnt) {
                $rect{purple_highlight_dest}
                  = SDL::Rect->new(-x => $rect{middle}->x + 12,
                                   '-y' => $rect{dialog_file_list}->y + 10 + 25 * ($cnt - $file_start_offset),
                                   -width => $surf_purple_highlight->width, -height => $surf_purple_highlight->height);
                
                $surf_purple_highlight->blit($rect{purple_highlight_src}, $app, $rect{purple_highlight_dest});
                $app->update($rect{purple_highlight_dest});
            }
            $app->print($rect{middle}->x + 19, $rect{dialog_file_list}->y + 8 + 25 * ($cnt - $file_start_offset),
			uc($levelsets[$cnt])); 
        }
    } else {
        # erase the old highlight 
        $rect{old_highlight} = SDL::Rect->new(
            -x => $rect{middle}->x + 12,
            '-y' => $rect{dialog_file_list}->y + 10 + 25 * ($list_browser_highlight_offset - $list_browser_file_start_offset), 
            -width => $surf_purple_highlight->width, -height => $surf_purple_highlight->height);
        
        $rect{erase_highlight} = SDL::Rect->new(
            -x => $rect{old_highlight}->x - $rect{dialog_file_list}->x,
	    '-y' => $rect{old_highlight}->y - $rect{dialog_file_list}->y,
	    -width => $surf_purple_highlight->width, -height => $surf_purple_highlight->height);

        # it is possible that the highlighed dude is off the screen. In this case, do not
        # call the blit, because there is no visible highlight to remove
        if ($list_browser_highlight_offset >= $list_browser_file_start_offset
            && $list_browser_highlight_offset <= $list_browser_file_start_offset + 3) { 
            $surf_file_list_background->blit($rect{erase_highlight}, $app, $rect{old_highlight});
            $app->update($rect{old_highlight});
            # draw the text of the old highligted dude
            $app->print($rect{middle}->x + 19,
			$rect{dialog_file_list}->y + 8 + 25 * ($list_browser_highlight_offset - $list_browser_file_start_offset),
			uc($levelsets[$list_browser_highlight_offset])); 
        }

        # draw the highlight
        $rect{purple_highlight_dest} = SDL::Rect->new(
            -x => $rect{middle}->x + 12,
            '-y' => $rect{dialog_file_list}->y + 10 + 25 * ($file_highlight_offset - $file_start_offset), 
            -width => $surf_purple_highlight->width,
            -height => $surf_purple_highlight->height);
        $surf_purple_highlight->blit($rect{purple_highlight_src}, $app, $rect{purple_highlight_dest});
        $app->update($rect{purple_highlight_dest});
		$app->print($rect{middle}->x + 19,
		    $rect{dialog_file_list}->y + 8 + 25 * ($file_highlight_offset - $file_start_offset),
		    uc($levelsets[$file_highlight_offset])); 

    }

    # set the unhighlight so the app thinks nothing's highlighted and will highlight 
    # the correct item in the next highlight function call
    unhighlight_option();

    $app->update($rect{middle});

    if ($file_highlight_offset != $list_browser_highlight_offset) {
        if ($list_browser_highlight_offset == -1) {
            $list_browser_highlight_offset = 0;

	    %file_browser_levelsets = ();
            @file_browser_levelsets_num_levels = ();
	    my @levelset_list = get_levelset_list();
	    foreach my $levelset (@levelset_list) {
                my %levelset = read_file($levelset);
                $file_browser_levelsets{$levelset} = \%levelset;
		push @file_browser_levelsets_num_levels, scalar keys %levelset;
	    }
        }
        $list_browser_highlight_offset = $file_highlight_offset;
        display_levelset_screenshot();
    } else {
        $list_browser_highlight_offset = $file_highlight_offset;
    }

    #reset the font back to white
    $font = SDL::Font->new("$FPATH/gfx/font.png");
    $app->flip;
}

our $surfstyle;
sub surf {
    my ($surface) = @_;
    $surfstyle ||= UNIVERSAL::isa($surface, 'HASH') ? 'hashref' : 'scalarref';
    return $surfstyle eq 'hashref' ? $surface->{-surface} : $$surface;
}
sub rect {
    my ($rect) = @_;
    return $surfstyle eq 'hashref' ? $rect->{-rect} : $$rect;
}

# display a scrrenshot (1/4 size) of the first level in a levelset on the current dialog
sub display_levelset_screenshot {

    my @levelsets = get_levelset_list();
    my $name = $levelsets[$list_browser_highlight_offset];

    $rect{middle} = get_dialog_rect();
    $rect{screenshot} = SDL::Rect->new(-x => $POS_1P{p1}{left_limit} - 40, '-y' => 0, 
				       -width => $POS_1P{p1}{right_limit} - $POS_1P{p1}{left_limit} + 80,
				       -height => $POS_1P{bottom_limit} - $POS_1P{p1}{top_limit} + 190);
    # if the user is choosing the start level, we need to move things up a little bit to make
    # room for the choose level widget
    my $widgetMove = 0;
    if ($displaying_dialog eq 'ls_play_choose_level') {
        $widgetMove = -25;
    }

    my ($x, $y) = ($rect{middle}->x + $rect{middle}->width - $rect{screenshot}->width/4 - 12,
                   $rect{middle}->y + $rect{middle}->height/2 - $rect{screenshot}->height/8 - 3 + $widgetMove);


    state %shrinks;
    my $current_nb = $start_level || 1;
    if (!exists $shrinks{$name}{$current_nb}) {
        my $surf = SDL::Surface->new(-name => "$FPATH/gfx/menu/please_wait.png");
        $surf->blit(SDL::Rect->new(-width => $surf->width, -height => $surf->height),
                    $app,
                    SDL::Rect->new('-x' => $rect{scroll_list_background_dest}->x + $rect{scroll_list_background_dest}->width + 7,
                                   '-y' =>  $rect{scroll_list_background_dest}->y + 20,
                                   -width => $surf->width, -height => $surf->width));
        $app->update($rect{middle});

        #- sorta "read ahead": will compute next 10 levels screenshots as well
        state $s_save;
        if (!$s_save) {
            $s_save = SDL::Surface->new(-name => "$FPATH/gfx/level_editor.png");
        }
        #- don't read-ahead if $start_level is void because it
        #- indicates we're just selecting a levelset in the editor
        my @read_ahead = $start_level ? ($current_nb - 10, $current_nb - 3 .. $current_nb + 10, $current_nb + 20)
                                      : ($current_nb);
        foreach my $nb (@read_ahead) {
            next if $nb < 1 || exists $shrinks{$name}{$nb};
            my %ls = %{$file_browser_levelsets{$name}};
            last if !exists $ls{$nb};
            my $s = SDL::Surface->new(-width => $s_save->width, -height => $s_save->height, -depth => 32, -Amask => "0 but true");
            my $rect = SDL::Rect->new(-width => $app->width, -height => $app->height);
            $s_save->blit($rect, $s, $rect);
            load_level($s, $nb, %ls);
            my $dest = SDL::Surface->new(-width => $rect{screenshot}->width / 4, -height => $rect{screenshot}->height / 4,
                                         -depth => 32, -Amask => "0 but true");
            fb_c_stuff::shrink(surf($dest), surf($s), 0, 0, rect($rect{screenshot}), 4);
            $shrinks{$name}{$nb} = $dest;
        }
    }

    my $image = $shrinks{$name}{$current_nb};
    my $rect = SDL::Rect->new(-width => $image->width, -height => $image->height, '-x' => $x, '-y' => $y);
    $image->blit(SDL::Rect->new(-width => $image->width, -height => $image->height), $app, $rect);
    $app->update($rect{middle});
}


#- ----------- levels and levelsets operations ------------------------------------------

# subroutine load_level
sub load_level {
    my ($surface_tmp, $curr_lvl, %b) = @_;

    if (!$surface_tmp) {
        $curr_lvl = $curr_level;
        %b = %bubble_hash;
        clear_level();
        print_level_nb();
    }

    iter_rowscols {
	my $bub = \$b{$curr_lvl}{$::col}{$::row};
	defined($$bub) or $$bub = '-';  #- sanitize
	if ($$bub ne '-') {
	    draw_bubble($$bub + 1,
			$::col * $BUBBLE_SIZE + $POS_1P{p1}{left_limit} + odd($::row)*$BUBBLE_SIZE/2,
			$::row * $ROW_SIZE + $POS_1P{p1}{top_limit},
			$ALPHA_BUBBLE_NO, $surface_tmp, undef, 1);
	}
    };

    $app->flip;
}

# subroutine to clear level off the screen
sub clear_level {
    $rect{clear} = SDL::Rect->new(-width => $POS_1P{p1}{right_limit} - $POS_1P{p1}{left_limit},
				  -height => $POS_1P{bottom_limit} - $POS_1P{p1}{top_limit} + $BUBBLE_SIZE,
				  -x => $POS_1P{p1}{left_limit},
				  '-y' => $POS_1P{p1}{top_limit});
    
    $background->blit($rect{clear}, $app, $rect{clear});
}

sub delete_level {

    delete $bubble_hash{$curr_level};

    if ($curr_level - 1 == keys %bubble_hash) {
        $curr_level--;
        if ($curr_level == 0) {
            append_level();
        }
    } else {
        foreach my $lev ($curr_level .. keys %bubble_hash) {
            $bubble_hash{$lev} = $bubble_hash{$lev + 1};
        }

        delete $bubble_hash{keys %bubble_hash};
    }   

    $modified_levelset = 1;
}

# subroutine to actually create a new levelset
sub create_new_levelset {

    $levelset_name = lc($new_ls_name_text);

    %bubble_hash = ();
    $curr_level = 0;
    append_level();

    print_levelset_name();
    load_level();
    $modified_levelset = 0;
}

# subroutine to delete a levelset
sub delete_levelset {

    my @levelsets = get_levelset_list();
    my $lvs_name = $levelsets[$list_browser_highlight_offset];
    unlink "$FBLEVELS/$lvs_name" or die "Can't remove $FBLEVELS/$lvs_name\n";
    remove_dialog();

    $levelset_name eq $lvs_name and create_deleted_current_levelset_dialog();
}

# this subroutine is mostly copied from frozen-bubble
sub read_file {
    my ($file_name) = @_;

    my $row = 0;
    my $lev_number = 1;
    my %tmp_hash;
    foreach my $line (cat_("$FBLEVELS/$file_name")) {
        if ($line !~ /\S/) {
            if ($row) {
                $lev_number++;
                $row = 0;
            }
        } else {
            my $col = 0;
            foreach (split ' ', $line) {
                $tmp_hash{$lev_number}{$col}{$row} = $_;
                $col++;
            }
            $row++;
        }
    }

    return %tmp_hash;

}

# subroutine to open the levelset
sub open_levelset {
    my (@levelsets);
    # reset the deleted_current_levelset flag in case
    # we were in that situation

    $deleted_current_levelset = 0; 
    @levelsets = get_levelset_list();

    $levelset_name = $levelsets[$list_browser_highlight_offset];
    %bubble_hash = read_file($levelset_name);
    print_levelset_name();
    $curr_level = 1;
    remove_dialog();
    $modified_levelset = 0;
}


#- ----------- navigation in a levelset ------------------------------------------

sub prev_level {
    $curr_level > 1 and $curr_level--;
    load_level();
}

sub next_level {
    $curr_level < keys %bubble_hash and $curr_level++;
    load_level();
}

sub first_level {
    $curr_level = 1;
    load_level();
}

sub last_level {
    $curr_level = keys %bubble_hash;
    load_level();
}

sub jump_to_level {
    my ($n) = @_;
    if ($n >= 1 && $n <= keys %bubble_hash) {
	$curr_level = $_[0];
	load_level();
    }
}

sub insert_level {
    for (my $lev = 1 + keys %bubble_hash; $lev > $curr_level; $lev--) {
        $bubble_hash{$lev} = $bubble_hash{$lev - 1};
    }

    delete $bubble_hash{$curr_level};
    
    # initialize our new level
    iter_rowscols { $bubble_hash{$curr_level}{$::col}{$::row} = '-' };

    load_level();
    $modified_levelset = 1;
}

sub append_level {
    $curr_level++;
    insert_level();
}

sub move_level_left {
    $curr_level > 1 or return;
    ($bubble_hash{$curr_level-1}, $bubble_hash{$curr_level}) = ($bubble_hash{$curr_level}, $bubble_hash{$curr_level-1});
    $curr_level--;
    load_level();
    $modified_levelset = 1;
}

sub move_level_right {
    $curr_level < keys(%bubble_hash) or return;
    ($bubble_hash{$curr_level+1}, $bubble_hash{$curr_level}) = ($bubble_hash{$curr_level}, $bubble_hash{$curr_level+1});
    $curr_level++;
    load_level();
    $modified_levelset = 1;
}


#- ----------- printing stuff ------------------------------------------

sub print_cancel_text {
    my ($do_highlight) = @_;

    if ($displaying_dialog ne '') {
        $rect{middle} = get_dialog_rect();

        $rect{cancel_src} = SDL::Rect->new(-x => $rect{middle}->width - $rect{option_highlight}->width, 
					   '-y' => 6 * $WOOD_PLANK_HEIGHT - 4,
					   -width => $rect{middle}->width/2, -height => $WOOD_PLANK_HEIGHT);
    
        $rect{cancel} = SDL::Rect->new(-x => $rect{middle}->x + $rect{middle}->width - $rect{option_highlight}->width,
				       '-y' => $rect{middle}->y + 6 * $WOOD_PLANK_HEIGHT - 4,
				       -width => $rect{middle}->width/2, -height => $WOOD_PLANK_HEIGHT);

        $surface_dialog->blit($rect{cancel_src}, $app, $rect{cancel});
        $app->update($rect{cancel});
    
        $app->print($rect{middle}->x + $rect{middle}->width - 120, $rect{middle}->y + 6 * $WOOD_PLANK_HEIGHT, 'CANCEL');
        if ($do_highlight) {
            $highlight->blit($rect{option_highlight}, $app, $rect{cancel});
            $app->update($rect{cancel});
        }
    }
}

sub print_dialog_list_arrow {
    my ($do_highlight, $type) = @_;

    $rect{middle} = get_dialog_rect();
    
    my $surf_list_arrow = SDL::Surface->new(-name => "$FPATH/gfx/list_arrow_$type.png");
    $rect{list_arrow_src} = SDL::Rect->new(-width => $surf_list_arrow->width, -height => $surf_list_arrow->height);
    $rect{list_arrow_dest} = SDL::Rect->new(
		    '-x' => $rect{middle}->x + 4 * $rect{middle}->width/6 + 2,
		    '-y' => $type eq 'up' ? $rect{dialog_file_list}->y + 2
		                          : $rect{dialog_file_list}->y + $rect{dialog_file_list}->height - $surf_list_arrow->height - 2,
		    -width => $surf_list_arrow->width, -height => $surf_list_arrow->height);

    my $surf_scroll_list_background = SDL::Surface->new(-name => "$FPATH/gfx/scroll_list_background.png");
    $rect{erase_arrow} = SDL::Rect->new('-x' => $rect{list_arrow_dest}->x - $rect{scroll_list_background_dest}->x,
					'-y' => $rect{list_arrow_dest}->y - $rect{scroll_list_background_dest}->y,
					-width => $surf_list_arrow->width, -height => $surf_list_arrow->height);

    $surf_scroll_list_background->blit($rect{erase_arrow}, $app, $rect{list_arrow_dest});
    $app->update($rect{list_arrow_dest});

    $surf_list_arrow->blit($rect{list_arrow_src}, $app, $rect{list_arrow_dest});
    $app->update($rect{list_arrow_dest});

    if ($do_highlight) {
        $highlight->blit($rect{list_arrow_src}, $app, $rect{list_arrow_dest});
        $app->update($rect{list_arrow_dest});
    }
}


sub print_dialog_select_level_arrow {
    my ($do_highlight, $type, $more) = @_;
    $rect{middle} = get_dialog_rect();
    
    my $surf_list_arrow = SDL::Surface->new(-name => "$FPATH/gfx/list_arrow_$type.png");
    $rect{list_arrow_src} = SDL::Rect->new(-width => $surf_list_arrow->width, -height => $surf_list_arrow->height);
    my $x = $type =~ /more/ ? 457 : 437;
    $rect{list_arrow_dest} = SDL::Rect->new(
		    '-x' => $x,
		    '-y' => $type =~ /up/ ? $rect{middle}->y + 180 
                                          : $rect{middle}->y + 202,
		    -width => $surf_list_arrow->width, -height => $surf_list_arrow->height);

    my $surf_arrow_background = SDL::Surface->new(-name => "$FPATH/gfx/menu/void_panel.png");
    $rect{erase_arrow} = SDL::Rect->new('-x' => $x - $rect{middle}->x,
					'-y' => $type =~ /up/ ? 180
					                      : 202, 
					-width => $surf_list_arrow->width, -height => $surf_list_arrow->height);

    $surf_arrow_background->blit($rect{erase_arrow}, $app, $rect{list_arrow_dest});
    $app->update($rect{list_arrow_dest});

    $surf_list_arrow->blit($rect{list_arrow_src}, $app, $rect{list_arrow_dest});
    $app->update($rect{list_arrow_dest});

    if ($do_highlight && is_ok_modify_selected_level($type)) {
        $highlight->blit($rect{list_arrow_src}, $app, $rect{list_arrow_dest});
        $app->update($rect{list_arrow_dest});
    }
}

sub print_dialog_select_level_arrow_down {
    my ($do_highlight) = @_;
    print_dialog_select_level_arrow($do_highlight, 'down');
}
  
sub print_dialog_select_level_arrow_up {
    my ($do_highlight) = @_;
    print_dialog_select_level_arrow($do_highlight, 'up');
}
    
sub print_dialog_select_level_arrow_down_more {
    my ($do_highlight) = @_;
    print_dialog_select_level_arrow($do_highlight, 'down_more');
}
  
sub print_dialog_select_level_arrow_up_more {
    my ($do_highlight) = @_;
    print_dialog_select_level_arrow($do_highlight, 'up_more');
}
    
sub print_dialog_list_arrow_down {
    my ($do_highlight) = @_;
    print_dialog_list_arrow($do_highlight, 'down');
}

sub print_dialog_list_arrow_up {
    my ($do_highlight) = @_;
    print_dialog_list_arrow($do_highlight, 'up');
}

# subroutine to print out the levelset name at the top of the screen
sub print_levelset_name {
    $rect{ls_name_erase} = SDL::Rect->new(-x => 195, '-y' => 0, -width => 445-195, -height => 35);
    $background->blit($rect{ls_name_erase}, $app, $rect{ls_name_erase});
    $app->print(($background->width - SDL_TEXTWIDTH(uc($levelset_name)))/2 - 6, 7, uc($levelset_name));
    $app->flip;
}

sub print_text_generic {
    my ($do_highlight, $name, $xpos, $ypos, $text) = @_;

    $background->blit($rect{$name}, $app, $rect{$name});
    $app->update($rect{$name});

    $app->print($xpos, $ypos, $text || uc($name));
    if ($do_highlight) {
        $highlight->blit($rect{option_highlight}, $app, $rect{$name});
        $app->update($rect{$name});
    }
}
    
sub print_first_text {
    print_text_generic($_[0], 'first', $WOOD_WIDTH/2, $rect{first}->y + 6);
}

sub print_last_text {
    print_text_generic($_[0], 'last', 20, $rect{last}->y + 6);
}

sub print_prev_text {
    print_text_generic($_[0], 'prev', $WOOD_WIDTH/2, $rect{prev}->y + 6);
}

sub print_next_text {
    print_text_generic($_[0], 'next', 20, $rect{next}->y + 6);
}

sub print_ls_delete_text {
    print_text_generic($_[0], 'ls_delete', $rect{ls_delete}->x + 12, $rect{ls_delete}->y + 6, 'DELETE');
}

sub print_ls_new_text {
    print_text_generic($_[0], 'ls_new', $rect{ls_new}->x + $WOOD_WIDTH/2, $rect{ls_new}->y + 6, 'NEW');
}

sub print_ls_open_text {
    print_text_generic($_[0], 'ls_open', $rect{ls_open}->x + 35, $rect{ls_open}->y + 6, 'OPEN');
}

sub print_ls_save_text {
    print_text_generic($_[0], 'ls_save', $rect{ls_save}->x + $WOOD_WIDTH/2, $rect{ls_save}->y + 6, 'SAVE');
}

sub print_lvl_append_text {
    print_text_generic($_[0], 'lvl_append', $rect{lvl_append}->x + 20, $rect{lvl_append}->y + 6, 'APPEND');
}

sub print_lvl_delete_text {
    print_text_generic($_[0], 'lvl_delete', $rect{lvl_delete}->x + $WOOD_WIDTH/2, $rect{lvl_delete}->y + 6, 'DELETE');
}

sub print_lvl_insert_text {
    print_text_generic($_[0], 'lvl_insert', $rect{lvl_insert}->x + $WOOD_WIDTH/2 - 5, $rect{lvl_insert}->y + 6, 'INSERT');
}

sub print_help_text {
	print_text_generic($_[0], 'help', $rect{help}->x + 20, $rect{help}->y + 6, 'HELP!');
}

# filename is OK == not blank or pre-existing
sub is_ok_filename {
    length($new_ls_name_text) == 0 and return 0;

    lc($new_ls_name_text) eq lc($_) and return 0 foreach get_levelset_list();

    return 1;
}


# subroutine to determine if the entered jump to level value is OK
sub is_ok_jump_value {
    if (length($jump_to_level_value) == 0 || $jump_to_level_value == 0 || $jump_to_level_value > keys %bubble_hash) {
        return 0;
    } else {
        return 1;
    }
    
}

sub is_ok_select_start_value {
    
    my ($proposed_level) = @_;
    if ($proposed_level >= 1 && $proposed_level <= $file_browser_levelsets_num_levels[$list_browser_highlight_offset]) {
        return 1;
    } else {
        return 0;
    }
    
}

# subroutine to get the letter pressed by the user on the keyboard
# this subroutine is taken from frozen-bubble code
sub keysym_to_char($) { 
    my ($key) = @_; 
    eval "$key eq SDLK_$_" and return uc($_) foreach @fbsyms::syms; 
}


sub print_jump_to_level_value {
    
    my ($key) = @_;
    if ($key == SDLK_ESCAPE()) {
        highlight_option('cancel');
        $app->delay(200);
        remove_dialog(); 
    } elsif (($key == SDLK_RETURN() || $key == SDLK_KP_ENTER()) && length($jump_to_level_value) > 0 ) {
        highlight_option('ok');
        $app->delay(200);
        remove_dialog();
        jump_to_level($jump_to_level_value);
    } elsif ($key == SDLK_BACKSPACE() || ($key >= SDLK_0() && $key <= SDLK_9()) || ( $key >= SDLK_KP0() && $key <= SDLK_KP9())) {
        #- translate keypad values to real values
        if ($key >= SDLK_KP0() && $key <= SDLK_KP9()) {
            foreach (0..9) {
                if (eval("$key == SDLK_KP$_()")) {
                    $key = eval("SDLK_$_()");
                }
            }
        }
        # first erase the previous words
        $rect{dialog_blank} = SDL::Rect->new('-y' => 2 * $WOOD_PLANK_HEIGHT,
					     -width => $surface_dialog->width,
					     -height => $surface_dialog->height - 3 * $WOOD_PLANK_HEIGHT);
        $rect{dialog_new} = SDL::Rect->new(-x => $background->width/2 - $surface_dialog->width/2, 
					   '-y' => $background->height/2 - $surface_dialog->height/2 + 2 * $WOOD_PLANK_HEIGHT, 
					   -width => $surface_dialog->width,
					   -height => $surface_dialog->height - 3*$WOOD_PLANK_HEIGHT);
        $surface_dialog->blit($rect{dialog_blank}, $app, $rect{dialog_new});
        $app->flip;
        if ($key == SDLK_BACKSPACE()) {
            chop $jump_to_level_value;
        } else {
            #- adjust the value, but then check to make sure its a valid value
            $jump_to_level_value .= keysym_to_char($key); 
            if (!is_ok_jump_value()) {
                chop $jump_to_level_value;
                unhighlight_option();
            }
        }

        $app->print($rect{dialog_new}->x + $rect{dialog_new}->width/2 - 12 * length($jump_to_level_value)/2, 210, $jump_to_level_value);
    }
}

# subroutine to print the name of the new levelset in the dialog
sub print_new_ls_name {
    my ($key) = @_;
    if ($key == SDLK_ESCAPE()) {
        if ($displaying_dialog eq 'ls_new') {
            highlight_option('cancel');
            $app->delay(200);
            remove_dialog(); 
        }
    } elsif (($key == SDLK_RETURN() || $key == SDLK_KP_ENTER()) && length($new_ls_name_text) > 0 && is_ok_filename() ) {
        if ($displaying_dialog eq 'ls_new') {
            highlight_option('ok');
        } elsif ($displaying_dialog eq 'ls_new_ok_only') {
            highlight_option('ok_right');
        }
        $app->delay(200);
        remove_dialog(); 
        create_new_levelset();
    } elsif ($key == SDLK_BACKSPACE()
	     || (length($new_ls_name_text) < 14 && ($key == SDLK_KP_MINUS()
						    || $key >= SDLK_KP0() && $key <= SDLK_KP9()
						    || $key >= SDLK_a() && $key <= SDLK_z()
						    || $key == SDLK_MINUS()
						    || $key >= SDLK_0 && $key <= SDLK_9()))) {
        # first erase the previous words
        $rect{dialog_blank} = SDL::Rect->new('-y' => 2 * $WOOD_PLANK_HEIGHT,
					     -width => $surface_dialog->width,
					     -height => $surface_dialog->height - 3 * $WOOD_PLANK_HEIGHT);
        $rect{dialog_new} = SDL::Rect->new(-x => $background->width/2 - $surface_dialog->width/2, 
					   '-y' => $background->height/2 - $surface_dialog->height/2 + 2 * $WOOD_PLANK_HEIGHT, 
					   -width => $surface_dialog->width,
					   -height => $surface_dialog->height - 3*$WOOD_PLANK_HEIGHT);
        $surface_dialog->blit($rect{dialog_blank}, $app, $rect{dialog_new});
        $app->flip;
        if ($key == SDLK_BACKSPACE()) {
            chop $new_ls_name_text;
        } elsif ($key == SDLK_MINUS() || $key == SDLK_KP_MINUS()) {
            $new_ls_name_text .= '-';
        } elsif ($key >= SDLK_KP0() && $key <= SDLK_KP9()) {
            my $kp_num;
	    eval("SDLK_KP$_() eq $key") and $new_ls_name_text .= $_ foreach 0..9;
        } else {
            $new_ls_name_text .= keysym_to_char($key); 
        }
        $app->print($rect{dialog_new}->x + $rect{dialog_new}->width/2 - 12 * length($new_ls_name_text)/2, 210, $new_ls_name_text);
    }

    # if the filename is bad, unhighlight any option that is highlighted since
    # they can't do anything...
    is_ok_filename() == 0 and unhighlight_option();

}

# subroutine to print the ok text on the right side of the dialog
sub print_ok_right_text {
    my ($do_highlight) = @_;
    if ($displaying_dialog ne '') {
        $rect{middle} = get_dialog_rect();

        $rect{cancel_src} = SDL::Rect->new(-x => $rect{middle}->width - $rect{option_highlight}->width, 
					   '-y' => 6 * $WOOD_PLANK_HEIGHT - 4,
					   -width => $rect{middle}->width/2,
					   -height => $WOOD_PLANK_HEIGHT);
    
        $rect{cancel} = SDL::Rect->new(-x => $rect{middle}->x + $rect{middle}->width - $rect{option_highlight}->width,
				       '-y' => $rect{middle}->y + 6 * $WOOD_PLANK_HEIGHT - 4,
				       -width => $rect{middle}->width/2,
				       -height => $WOOD_PLANK_HEIGHT);

        $surface_dialog->blit($rect{cancel_src}, $app, $rect{cancel});
        $app->update($rect{cancel});
    
        $app->print($rect{middle}->x + $rect{middle}->width - 80, $rect{middle}->y + 6 * $WOOD_PLANK_HEIGHT, 'OK');
        if ($do_highlight) {
            $highlight->blit($rect{option_highlight}, $app, $rect{cancel});
            $app->update($rect{cancel});
        }
    }
}

sub print_ok_text {
    my ($do_highlight) = @_;

    if ($displaying_dialog ne '') {
        $rect{middle} = get_dialog_rect();

        $rect{ok_src} = SDL::Rect->new('-y' => 6 * $WOOD_PLANK_HEIGHT - 4, 
				       -width => $rect{middle}->width/2,
				       -height => $WOOD_PLANK_HEIGHT);
    
        $rect{ok} = SDL::Rect->new(-x => $rect{middle}->x,
				   '-y' => $rect{middle}->y + 6 * $WOOD_PLANK_HEIGHT - 4,
				   -width => $rect{middle}->width/2,
				   -height => $WOOD_PLANK_HEIGHT);

        $surface_dialog->blit($rect{ok_src}, $app, $rect{ok});
        $app->update($rect{ok});
    
        $app->print($rect{middle}->x + 60, $rect{middle}->y + 6 * $WOOD_PLANK_HEIGHT, 'OK');
        if ($do_highlight) {
            $highlight->blit($rect{option_highlight}, $app, $rect{ok});
            $app->update($rect{ok});
        }
    }
}

sub print_level_nb {
    my $posx = 183;
    my $posy = 421;
    my $level_sign_rect = SDL::Rect->new(-x => $posx - 50, '-y' => $posy, -width => 100, -height => 25);
    $background->blit($level_sign_rect, $app, $level_sign_rect);
    my $text = "$curr_level/" . keys %bubble_hash;
    $app->print($posx - 12 * length($text)/2, $posy, $text);
    $app->update($level_sign_rect);
}


#- ----------- initialization stuff ------------------------------------------

# subroutine to add specific bubble option
sub add_bubble_option {
    my ($bubble_id, $col, $row) = @_;
    draw_bubble($bubble_id, bubble_optionx($col), bubble_optiony($row), $ALPHA_BUBBLE_NO);
}

# subroutine to add the bubble options
sub add_bubble_options {
    my ($count, $col_count);
    # add my list of bubbles on the left
    $count = 0;

    while ($count < $NUM_BUBBLES_AVAIL) {
        $col_count = 0;
        while ($col_count < $BUBBLES_PER_ROW && $count < $NUM_BUBBLES_AVAIL) {
            add_bubble_option($count + 1, $col_count, floor($count/$BUBBLES_PER_ROW));
            $col_count++;
            $count++;
        }
    }

    if ($col_count >= $BUBBLES_PER_ROW) {
        $col_count = 0;
    }

}

# subroutine to add the erase option
sub add_erase_option {
    my $erase = SDL::Surface->new(-name => "$FPATH/gfx/balls/stick_effect_6.png");
    $erase->blit(NULL, $app, $rect{erase});
    $app->update($rect{erase});
}

# subroutine to do the initial setup
sub init_setup {
    my ($application_caller, $sdlapp) = @_;

    init_app($application_caller, $sdlapp);

    $background->blit(NULL, $app, $rect{background});
    $app->update($rect{background});

    add_bubble_options();
    add_erase_option();

    # set font
    $font = new SDL::Font("$FPATH/gfx/font.png");
    
    $app->print(5, $BUBBLE_WOOD_Y + 3, 'CHOOSE BUBBLE');

    # add navigation words
    $app->print(20, $NAV_WOOD_Y + 8,'NAVIGATION');
    print_prev_text(0);
    print_next_text(0);
    print_first_text(0);
    print_last_text(0);

    # add levelset words
    $app->print($RIGHT_WOOD_X + 30, $LEVELSET_WOOD_Y + 8, 'LEVELSET');
    print_ls_new_text(0);
    print_ls_open_text(0);
    print_ls_save_text(0);
    print_ls_delete_text(0);

    # add level words
    $app->print($RIGHT_WOOD_X + 45, $LEVEL_WOOD_Y + 8, 'LEVEL');
    print_lvl_insert_text(0);
    print_lvl_append_text(0);
    print_lvl_delete_text(0);

    # add help words
    print_help_text(0);
    
    # add initial bubble to draw
    change_color(1);

    $modified_levelset = 0;
    -d "$FBLEVELS" or mkdir "$FBLEVELS" or die "Can't create $FBLEVELS directory.\n";
    -f "$FBLEVELS/default-levelset" or cp_af("$FPATH/data/levels", "$FBLEVELS/default-levelset");

    %bubble_hash = read_file($levelset_name);

    # if inputted level is > the number of levels than reset current level to 1
    $curr_level > keys %bubble_hash and $curr_level = 1;
    load_level();

    SDL::WarpMouse(320, 240);

    print_levelset_name();
    $app->flip;

    $button_hold = 0;
}

# subroutine to initialize the application
sub init_app {
    my ($application_caller, $sdlapp) = @_;
    my @rcfile_data;

    $app = $sdlapp;
    # we only want to check to see if we're in full screen if we're
    # running as a stand alone app. If we're running embedded in the
    # game, we'll use whatever is already set up
    if ($application_caller eq 'stand-alone') {
        @rcfile_data = cat_("$FBHOME/rc");

        if ($command_line_fullscreen == 1) {
	    $app->fullscreen;
        } elsif ($rcfile_data[0] eq "\$fullscreen = 1;\n") {
            $app->fullscreen;
        }
    } else {
        # we need to set the default levelset name to "default-levelset"
        $levelset_name = 'default-levelset';
        $curr_level = 1;
    }

    $font = new SDL::Font("$FPATH/gfx/font.png");

    # background image
    $background = SDL::Surface->new(-name => "$FPATH/gfx/level_editor.png");

    my @allrects =
     ({ name => 'background', width => $background->width, height => $background->height },
      # bubble wood rectangle (without heading part)
      { name => 'bubble_wood', x => $LEFT_WOOD_X, 'y' => $BUBBLE_WOOD_Y + $WOOD_PLANK_HEIGHT,
	width => $WOOD_WIDTH, height => $WOOD_PLANK_HEIGHT * ($NUM_BUBBLES_AVAIL + 1)/$BUBBLES_PER_ROW },
      { name => 'erase', x => bubble_optionx($NUM_BUBBLES_AVAIL % $BUBBLES_PER_ROW),
	'y' => bubble_optiony(floor($NUM_BUBBLES_AVAIL / $BUBBLES_PER_ROW)),
	width => $BUBBLE_SIZE, height => $BUBBLE_SIZE },

      # navigation rectangles
      { name => 'prev', x => $LEFT_WOOD_X, 'y' => $NAV_WOOD_Y + $WOOD_PLANK_HEIGHT,
	width => $WOOD_WIDTH, height => $WOOD_PLANK_HEIGHT },
      { name => 'next', x => $LEFT_WOOD_X, 'y' => $NAV_WOOD_Y + 2 * $WOOD_PLANK_HEIGHT,
	width => $WOOD_WIDTH, height => $WOOD_PLANK_HEIGHT },
      { name => 'first', x => $LEFT_WOOD_X, 'y' => $NAV_WOOD_Y + 3 * $WOOD_PLANK_HEIGHT,
	width => $WOOD_WIDTH, height => $WOOD_PLANK_HEIGHT },
      { name => 'last', x => $LEFT_WOOD_X, 'y' => $NAV_WOOD_Y + 4 * $WOOD_PLANK_HEIGHT,
	width => $WOOD_WIDTH, height => $WOOD_PLANK_HEIGHT },

      # levelset rectangles
      { name => 'ls_new', x => $RIGHT_WOOD_X, 'y' => $LEVELSET_WOOD_Y + $WOOD_PLANK_HEIGHT,
	width => $WOOD_WIDTH, height => $WOOD_PLANK_HEIGHT },
      { name => 'ls_open', x => $RIGHT_WOOD_X, 'y' => $LEVELSET_WOOD_Y + 2 * $WOOD_PLANK_HEIGHT,
	width => $WOOD_WIDTH, height => $WOOD_PLANK_HEIGHT },
      { name => 'ls_save', x => $RIGHT_WOOD_X, 'y' => $LEVELSET_WOOD_Y + 3 * $WOOD_PLANK_HEIGHT,
	width => $WOOD_WIDTH, height => $WOOD_PLANK_HEIGHT },
      { name => 'ls_delete', x => $RIGHT_WOOD_X, 'y' => $LEVELSET_WOOD_Y + 4 * $WOOD_PLANK_HEIGHT,
	width => $WOOD_WIDTH, height => $WOOD_PLANK_HEIGHT },

      # level rectangles
      { name => 'lvl_insert', x => $RIGHT_WOOD_X, 'y' => $LEVEL_WOOD_Y + $WOOD_PLANK_HEIGHT,
	width => $WOOD_WIDTH, height => $WOOD_PLANK_HEIGHT },
      { name => 'lvl_append', x => $RIGHT_WOOD_X, 'y' => $LEVEL_WOOD_Y + 2 * $WOOD_PLANK_HEIGHT,
	width => $WOOD_WIDTH, height => $WOOD_PLANK_HEIGHT },
      { name => 'lvl_delete', x => $RIGHT_WOOD_X, 'y' => $LEVEL_WOOD_Y + 3 * $WOOD_PLANK_HEIGHT,
	width => $WOOD_WIDTH, height => $WOOD_PLANK_HEIGHT },

      # help rectangle
      { name => 'help', x => $RIGHT_WOOD_X, 'y' => $HELP_WOOD_Y,
        width => $WOOD_WIDTH, height => $WOOD_PLANK_HEIGHT},
	
      { name => 'bubble_option_highlight', x => 0, 'y' => 0,
	width => $BUBBLE_SIZE, height => $BUBBLE_SIZE },
      { name => 'option_highlight', x => 0, 'y' => 0,
	width => $WOOD_WIDTH, height => $WOOD_PLANK_HEIGHT }
      );

    $rect{$_->{name}} = SDL::Rect->new(-width => $_->{width}, -height => $_->{height},
				       -x => $_->{x}, '-y' => $_->{'y'}) foreach @allrects;

    $highlight = SDL::Surface->new(-name => "$FPATH/gfx/hover.gif");
    $highlight->set_alpha(SDL_SRCALPHA, 0x44);
}


1;
