_parent = -4;
_input_enabled = false;
_input_buffer = 2;
_input_time = _input_buffer;
_slots = [];
_chapters = [];
_chapter_index = 0;
_fade_in = false;
var max_chapter = UnknownEnum.Value_7;
var max_available_chapter = UnknownEnum.Value_4;
for (var i = 0; i < max_chapter; i++)
{
    var new_chapter = instance_create(0, -10 + (i * 60), obj_ui_chapter);
    var chapter = i + 1;
    new_chapter.init(id, chapter);
    _slots[array_length(_slots)] = new_chapter;
}
for (var i = 0; i < max_available_chapter; i++)
{
    var chapter = _slots[i];
    chapter.enable();
    _chapters[array_length(_chapters)] = chapter;
}

init = function(arg0)
{
    _parent = arg0;
    _init = true;
};

fade_in = function()
{
    for (var i = 0; i < array_length(_slots); i++)
        _slots[i].fade_in();
};

reset = function()
{
    _chapter_index = 0;
    for (var i = 0; i < array_length(_chapters); i++)
    {
        var chapter = _chapters[i];
        chapter.reset();
    }
};

highlight_chapter = function(arg0)
{
    for (var i = 0; i < array_length(_chapters); i++)
    {
        var chapter = _chapters[i].get_chapter();
        if (chapter == arg0)
        {
            _chapter_index = i;
            highlight();
        }
    }
};

highlight = function()
{
    for (var i = 0; i < array_length(_chapters); i++)
    {
        var chapter = _chapters[i];
        chapter.reset();
        if (i == _chapter_index)
            chapter.highlight();
    }
};

highlight_bottom = function()
{
    _chapter_index = array_length(_chapters) - 1;
    highlight();
};

enable_input = function()
{
    _input_enabled = true;
    _input_time = _input_buffer;
};

disable_input = function()
{
    _input_enabled = false;
    for (var i = 0; i < array_length(_chapters); i++)
    {
        var chapter = _chapters[i];
        chapter.disable_input();
    }
};

disable_all = function()
{
    _input_enabled = false;
    for (var i = 0; i < array_length(_chapters); i++)
    {
        var chapter = _chapters[i];
        chapter.disable_all();
    }
};

trigger_event = function(arg0, arg1)
{
    switch (arg0)
    {
        case "disable_scroll":
            disable_input();
            break;
        case "enable_scroll":
            enable_input();
            break;
        case "launch_game":
            disable_all();
            _parent.trigger_event("launch_game", arg1);
            break;
    }
};

enum UnknownEnum
{
    Value_4 = 4,
    Value_7 = 7
}