minetest/games/minimal/mods/test/formspec.lua

local clip_fs = [[
	style_type[label;noclip=%c]
	style_type[button;noclip=%c]
	style_type[image_button;noclip=%c]
	style_type[item_image_button;noclip=%c]
	style_type[tabheader;noclip=%c]
	style_type[field;noclip=%c]
	style_type[textarea;noclip=%c]
	style_type[checkbox;noclip=%c]
	style_type[dropdown;noclip=%c]
	style_type[scrollbar;noclip=%c]
	style_type[table;noclip=%c]

	label[0,0;A clipping test]
	button[0,1;3,0.8;x;A clipping test]
	image_button[0,2;3,0.8;bubble.png;x2;A clipping test]
	item_image_button[0,3;3,0.8;default:sword_steel;x3;A clipping test]
	tabheader[0,4.7;3,0.63;x4;Clip,Test,Text,Tabs;1;false;false]
	field[0,5;3,0.8;x5;Title;]
	textarea[0,6;3,1;x6;Title;]
	checkbox[0,7.5;x7;This is a test;true]
	dropdown[0,8;3,0.8;x8;Select An Item,One,Two,Three,Four,Five;1]
	scrollbar[0,9;3,0.8;horizontal;x9;3]
	tablecolumns[text;text]
	table[0,10;3,1;x10;one,two,three,four;1]
]]


local style_fs = [[
	style[one_btn1;bgcolor=red;textcolor=yellow;bgcolor_hovered=orange;
		bgcolor_pressed=purple]
	button[0,0;2.5,0.8;one_btn1;Button]

	style[one_btn2;border=false;textcolor=cyan]
	button[0,1.05;2.5,0.8;one_btn2;Text Button]

	style[one_btn3;bgimg=bubble.png;bgimg_hovered=default_apple.png;
		bgimg_pressed=heart.png]
	button[0,2.1;1,1;one_btn3;Bor]

	style[one_btn4;bgimg=bubble.png;bgimg_hovered=default_apple.png;
		bgimg_pressed=heart.png;border=false]
	button[1.25,2.1;1,1;one_btn4;Bub]

	style[one_btn5;bgimg=bubble.png;bgimg_hovered=default_apple.png;
		bgimg_pressed=heart.png;border=false;alpha=false]
	button[0,3.35;1,1;one_btn5;Alph]

	style[one_btn6;border=true]
	image_button[0,4.6;1,1;bubble.png;one_btn6;Border]

	style[one_btn7;border=false]
	image_button[1.25,4.6;1,1;bubble.png;one_btn7;NoBor]

	style[one_btn8;border=false]
	image_button[0,5.85;1,1;bubble.png;one_btn8;Border;false;true;heart.png]

	style[one_btn9;border=true]
	image_button[1.25,5.85;1,1;bubble.png;one_btn9;NoBor;false;false;heart.png]

	style[one_btn10;alpha=false]
	image_button[0,7.1;1,1;bubble.png;one_btn10;NoAlpha]

	style[one_btn11;alpha=true]
	image_button[1.25,7.1;1,1;bubble.png;one_btn11;Alpha]

	style[one_btn12;border=true]
	item_image_button[0,8.35;1,1;default:sword_steel;one_btn12;Border]

	style[one_btn13;border=false]
	item_image_button[1.25,8.35;1,1;default:sword_steel;one_btn13;NoBor]

	style[one_btn14;border=false;bgimg=test_bg.png;bgimg_hovered=test_bg_hovered.png;bgimg_pressed=test_bg_pressed.png;fgimg=bubble.png;fgimg_hovered=default_apple.png;fgimg_pressed=heart.png]
	image_button[0,9.6;1,1;bubble.png;one_btn14;Bg]

	style[one_btn15;border=false;bgimg=test_bg.png;bgimg_hovered=test_bg_hovered.png;bgimg_pressed=test_bg_pressed.png]
	item_image_button[1.25,9.6;1,1;default:sword_steel;one_btn15;Bg]



	container[2.75,0]

	style[one_tb1;textcolor=Yellow]
	tabheader[0,3;2.5,0.63;one_tb1;Yellow,Text,Tabs;1;false;false]

	style[one_f1;textcolor=yellow]
	field[0,4.25;2.5,0.8;one_f1;Field One;Yellow Text]

	style[one_f2;border=false;textcolor=cyan]
	field[0,5.75;2.5,0.8;one_f2;Field Two;Borderless Cyan Text]

	style[one_f3;textcolor=yellow]
	textarea[0,7.025;2.5,0.8;one_f3;Label;]] ..
		minetest.formspec_escape("Yellow Text\nLine two") .. [[ ]

	style[one_f4;border=false;textcolor=cyan]
	textarea[0,8.324999999999999;2.5,0.8;one_f4;Label;]] ..
		minetest.formspec_escape("Borderless Cyan Text\nLine two") .. [[ ]

	container_end[]
]]

--style_type[label;textcolor=green]
--label[0,0;Green]
--style_type[label;textcolor=blue]
--label[0,1;Blue]
--style_type[label;textcolor=;border=true]
--label[1.2,0;Border]
--style_type[label;border=true;bgcolor=red]
--label[1.2,1;Background]
--style_type[label;border=;bgcolor=]
--label[0.75,2;Reset]


local pages = {
	[[
		size[12,12]
		real_coordinates[true]
		image_button[0,0;1,1;logo.png;;1x1]
		image_button[1,0;2,2;logo.png;;2x2]
		button[0,2;1,1;;1x1]
		button[1,2;2,2;;2x2]
		item_image[0,4;1,1;air]
		item_image[1,4;2,2;air]
		item_image_button[0,6;1,1;test:node;;1x1]
		item_image_button[1,6;2,2;test:node;;2x2]
		field[3,.5;3,.5;name;Field;text]
		pwdfield[6,.5;3,1;name;Password Field]
		field[3,1;3,1;;Read-Only Field;text]
		textarea[3,2;3,.5;name;Textarea;text]
		textarea[6,2;3,2;name;Textarea;text\nmore text]
		textarea[3,3;3,1;;Read-Only Textarea;text\nmore text]
		textlist[3,4;3,2;name;Textlist,Perfect Coordinates;1;false]
		tableoptions[highlight=#ABCDEF75;background=#00000055;border=false]
		table[6,4;3,2;name;Table,Cool Stuff,Foo,Bar;2]
		dropdown[3,6;3,1;name;This,is,a,dropdown;1]
		dropdown[6,6;3,2;name;I,am,a,bigger,dropdown;5]
		image[0,8;3,2;ignore.png]
		box[3,7;3,1;#00A3FF]
		checkbox[3,8;name;Check me!;false]
		checkbox[3,9;name;Uncheck me now!;true]
		scrollbar[0,11.5;11.5,.5;horizontal;name;500]
		scrollbar[11.5,0;.5,11.5;vertical;name;0]
		list[current_player;main;6,8;3,2;1]
		button[9,0;2.5,1;name;]
		button[9,1;2.5,1;name;]
		button[9,2;2.5,1;name;]
		label[9,0;This is a label.\nLine\nLine\nLine\nEnd]
		button[9,3;1,1;name;]
		vertlabel[9,4;VERT]
		label[10,3;HORIZ]
		tabheader[6.5,0;6,0.65;name;Tab 1,Tab 2,Tab 3,Secrets;1;false;false]
	]],

		"size[12,12]real_coordinates[true]" ..
		"label[0.375,0.375;Styled]" ..
		"label[6.375,0.375;Unstyled]" ..
		"box[0,0.75;12,0.1;#999]" ..
		"box[6,0.85;0.1,11.15;#999]" ..
		"container[0.375,1.225]" ..
		style_fs ..
		"container_end[]container[6.375,1.225]" ..
		style_fs:gsub("one_", "two_"):gsub("style%[[^%]]+%]", ""):gsub("style_type%[[^%]]+%]", "") ..
		"container_end[]",

		"size[12,12]real_coordinates[true]" ..
		"label[0.1,0.5;Clip]" ..
		"container[-2.5,1]" .. clip_fs:gsub("%%c", "false") .. "container_end[]" ..
		"label[11,0.5;Noclip]" ..
		"container[11.5,1]" .. clip_fs:gsub("%%c", "true") .. "container_end[]",
}

local function show_test_formspec(pname, page_id)
	page_id = page_id or 2

	local fs = pages[page_id] .. "tabheader[0,0;6,0.65;maintabs;Real Coord,Styles,Noclip;" .. page_id .. ";false;false]"

	minetest.show_formspec(pname, "test:formspec", fs)
end

minetest.register_on_player_receive_fields(function(player, formname, fields)
	if formname ~= "test:formspec" then
		return false
	end

	if fields.maintabs then
		show_test_formspec(player:get_player_name(), tonumber(fields.maintabs))
		return true
	end

end)

minetest.register_node("test:node", {
	tiles = { "air.png" }
})

minetest.register_chatcommand("formspec", {
	func = function(name)
		if not minetest.get_player_by_name(name) then
			return false, "You need to be online!"
		end

		show_test_formspec(name)
		return true, "Opened formspec"
	end,
})