Current GUI API

local gui = {}

function percent(x,y) return UDim2.new(x/100,0,y/100,0) end function gui:percent(x,y) return percent(x,y) end
function scale(x,y) return UDim2.new(x,0,y,0) end           function gui:scale(x,y) return scale(x,y) end
function pixels(x,y) return UDim2.new(0,x,0,y) end          function gui:pixels(x,y) return pixels(x,y) end

local recolor = "BackgroundColor3"

function color(r,g,b)
    return Color3.fromRGB(r,g,b)
end
function gui:color(...) return color(...) end

function gui:Frame()
    local f = Instance.new("Frame")
    f[recolor] = color(255,255,255)
    f.Size = pixels(0,0)
    f.BorderSizePixel = 0
    return f
end

function gui:RoundedFrame(color) -- game-specific
    -- Invisible Container Containing the round elements
    local f = gui:Frame()
    f.Name = "StyledFrame"
    f.Size = gui:pixels(150,150)
    f.BackgroundTransparency = 1
    local corners = {}
    -- Load Assets
    local corner = gui:ImageLabel("rbxgameasset://Images/roundcorner")
    corner.Name = "Corner"
    corners[1] = corner
    corners[2] = corner:Clone()
    corners[2].Rotation = 90
    corners[3] = corner:Clone()
    corners[3].Rotation = 270
    corners[4] = corner:Clone()
    corners[4].Rotation = 180

    corners[1].Parent = f
    corners[2].Parent = f
    corners[3].Parent = f
    corners[4].Parent = f

    local white = gui:Frame()
    white.Name = "Background"
    white.BackgroundColor3 = gui:color(255,255,255)
    white.BackgroundTransparency = 0
    local white2 = white:Clone()
    local white3 = white2:Clone()

    white.Parent = f
    white2.Parent = f
    white3.Parent = f

    local roundcontrol = {}

    --= Functions =--
    function roundcontrol.setTransparency(n) -- default: 0
        for _,image in pairs(corners) do
            image.ImageTransparency = n
        end
        white.BackgroundTransparency = n
        white2.BackgroundTransparency = n
        white3.BackgroundTransparency = n
    end

    function roundcontrol.setStyle(i) -- default: "rbxgameasset://Images/roundcorner"
        for _,image in pairs(corners) do
            image.Image = i
        end
    end

    function roundcontrol.setRoundSize(n) -- default: 25
        for _,image in pairs(corners) do
            image.Size = gui:pixels(n,n)
        end
        corners[2].Position = gui:percent(100,0) - gui:pixels(n,0)
        corners[3].Position = gui:percent(0,100) - gui:pixels(0,n)
        corners[4].Position = gui:percent(100,100) - gui:pixels(n,n)
        white.Size = gui:percent(100,100) - gui:pixels(0,n*2)
        white.Position = gui:pixels(0,n)
        white2.Size = gui:percent(100,0) + gui:pixels(-n*2,n)
        white2.Position = gui:pixels(n,0)
        white3.Size = gui:percent(100,0) + gui:pixels(-n*2,n)
        white3.Position = gui:percent(0,100) + gui:pixels(n,-n)
    end

    function roundcontrol.setColor(c) -- default: white
        for _,image in pairs(corners) do
            image.ImageColor3 = c
        end
        white.BackgroundColor3 = c
        white2.BackgroundColor3 = c
        white3.BackgroundColor3 = c
    end

    function roundcontrol.setLayer(c) -- default: 1
        for _,image in pairs(corners) do
            image.ZIndex = c
        end
        white.ZIndex = c
        white2.ZIndex = c
        white3.ZIndex = c
    end
    roundcontrol.setRoundSize(25)
    roundcontrol.setColor(color or gui:color(255,255,255))
    return {Frame=f,Functions=roundcontrol}
end

function gui:TextLabel()
    local f = Instance.new("TextLabel")
    f.Size = pixels(0,0)
    f.FontSize = "Size18"
    f.Font = "SourceSans"
    f.Text = ""
    f.TextColor3 = color(255,255,255)
    f.BorderSizePixel = 0
    return f
end

function gui:ImageLabel(i)
    local f = Instance.new("ImageLabel")
    f.Size = pixels(0,0)
    f.Image = i
    f.BackgroundTransparency = 1
    f.BorderSizePixel = 0
    return f
end

function gui:TextButton(click)
    local f = Instance.new("TextButton")
    f.Size = pixels(0,0)
    f.FontSize = "Size18"
    f.Font = "SourceSans"
    f.Text = ""

    f.TextColor3 = color(255,255,255)
    f.BorderSizePixel = 0
    if click then
        f.MouseButton1Click:connect(click)
    end
    return f
end

function gui:TextBox(change)
    local f = Instance.new("TextBox")
    f.Size = pixels(0,0)
    f.FontSize = "Size18"
    f.Font = "SourceSans"
    f.Text = ""

    f.TextColor3 = color(255,255,255)
    f.BorderSizePixel = 0
    if change then
        f.Changed:connect(function(property)
            if property == "Text" then
                change(f.Text)
            end
        end)
    end
    return f
end

function gui:Shadow(e)
    local f = gui:Frame()
    f[recolor] = color(0,0,0)
    f.Position = pixels(3,3)
    f.Size = percent(100,100)
    f.BackgroundTransparency = 50/100
    if e then
        e.ZIndex = e.ZIndex + 1
        f.Parent = e
    end
    return f
end

gui.Help = {}

gui.Help.new = function(...)
    local t = {...} -- [action [, yoffset [, parent [, text] ] ] ]
    local fields = {}
    if t[2] then
        fields.y = t[2]
    end
    if t[4] then
        fields.text = t[4]
    end
    if t[3] then
        fields.parent = t[3]
    end
    if t[1] then
        fields.action = t[1]
        if fields.action == "text" then
            local l = gui:TextLabel()
            l.TextXAlignment = "Left"
            l.TextYAlignment = "Top"
            l.TextColor3 = gui:color(255,255,255)
            l.Parent = fields.parent -- or nil
            l.Text = fields.text or ""
            l.Position = gui:pixels(0,fields.y or 0)
            return l
        end
        if fields.action == "title" then
            local l = gui:TextLabel()
            l.TextXAlignment = "Left"
            l.TextYAlignment = "Top"
            l.FontSize = "Size42"
            l.TextColor3 = gui:color(255,255,255)
            l.Parent = fields.parent -- or nil
            l.Text = fields.text or ""
            l.Position = gui:pixels(0,fields.y or 0)
            return l
        end
        if fields.action == "separator" then
            local l = gui:Frame()
            l.Parent = fields.parent -- or nil
            l.Size = gui:scale(1,0) + gui:pixels(-8,2)
            l.BackgroundTransparency = 0.5
            l.Position = gui:pixels(4,fields.y or 0)
            return l
        end
    end
end

return gui