init python:
    ex_chapters = [
        [ "Chicxulub Gutterlane", "chapter_x1" ],
        [ "The Mous Pad", "chapter_x2" ],
        [ "PTA Meeting", "chapter_x3" ],
        [ "Passion of the Trigga I", "chapter_x4" ],
        [ "Passion of the Trigga II", "chapter_x5" ],
        [ "Passion of the Trigga III", "chapter_x6" ],
        [ "Naomi's Tribulations I", "chapter_x7" ],
        [ "Naomi's Tribulations II", "chapter_x8" ],
        [ "Naomi's Tribulations III", "chapter_x9" ],
        [ "RAYmba's Observations", "chapter_x10" ]
    ]
    ex_chapters_menu = ex_chapters.copy()

    if persistent.endings is None:
        ending_image()

    pass

#similar to quick_button funcs
screen ex_ch_button(filename, label, function):
    button:
        xmaximum 600
        ymaximum 129
        action function
        if 'Back' in label or 'Return' in label or 'Quit' in label or 'Main Menu' in label:
            activate_sound "audio/ui/uiBack.wav"
        else:
            activate_sound "audio/ui/uiClick.wav"
        fixed:
            add filename xalign 0.5 yalign 0.5 zoom 0.9
            text label xalign 0.5 yalign 0.5 xanchor 0.5 size 34

# label_functions is [ [ "label", function() ], [ "foobar", foobar() ], .. ]
# Reuse the same image string and keep things 'neat'.
screen ex_ch_buttons(filename, label_functions):
    for l_f in label_functions:
        use ex_ch_button(filename, l_f[0], Start(l_f[1]) )

screen ex_ch_menu():

    python:
        global ex_chapters_menu
        ex_chapters_menu = ex_chapters.copy()
        e = persistent.endings #ending seen
        if (e ^ 0b0000 == 0):
            ex_chapters_menu.clear()
        elif not (e & 0b1111 == 0b1111):
            w = 4
            for i in range(0, 4):
                w -= persistent.endings >> i & 0b1 == 0b1

            #trish
            for i in range(5, 5-w, -1):
                ex_chapters_menu.remove(ex_chapters[i])
            #naomi
            for i in range(8, 8-w, -1):
                ex_chapters_menu.remove(ex_chapters[i])
            ex_chapters_menu.pop()

    tag menu
    style_prefix "main_menu"
    add gui.main_menu_background

    frame:
        xsize 420
        yfill True
        background "gui/overlay/main_menu.png"

#side_yfill True
    vbox:
        xpos 1940
        yalign 0.03
        if persistent.splashtype == 1:
            add "gui/sneedgame.png"
        else:
            add "gui/snootgame.png"

    viewport:
        # this could be better but its ok for now
        xpos 1885-540
        xmaximum 540
        ymaximum 0.8
        ypos 200
        yinitial 0
        scrollbars "vertical"
        mousewheel True
        draggable True
        pagekeys True
        vbox:
            #xpos 1885
            spacing 12
#yalign 0.98

            use ex_ch_button("gui/button/menubuttons/template_idle.png", "Return", ShowMenu("main_menu"))
#use ex_ch_button("gui/button/menubuttons/template_idle.png", str(e), ShowMenu("main_menu"))
            if len(ex_chapters_menu):
                use ex_ch_buttons("gui/button/menubuttons/template_idle.png", ex_chapters_menu )
            for x in range(0, len(ex_chapters) - len(ex_chapters_menu)):
                use ex_ch_button("gui/button/menubuttons/template_idle.png", "???", None)