LÖVE-Nuklear - a lightweight immediate mode GUI

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grump
Party member
Posts: 583
Joined: Sat Jul 22, 2017 7:43 pm

Re: LÖVE-Nuklear - a lightweight immediate mode GUI

There's a pull request on Github that fixes things inside love-nuklear to make it compatible with LÖVE 11. The author seems to have abandoned the lib though

Some things can't be fixed with the setColor hack - the color picker is broken and requires a fix in the C code.

keharriso
Citizen
Posts: 73
Joined: Fri Nov 16, 2012 9:34 pm

Re: LÖVE-Nuklear - a lightweight immediate mode GUI

LÖVE-Nuklear is back and better than ever in v2.5. If anyone has any problems, please add an issue to the github repo. Thanks, and good luck with your projects!
Last edited by keharriso on Sat Feb 09, 2019 2:15 am, edited 1 time in total.
LÖVE-Nuklear - a lightweight immediate mode GUI for LÖVE games

totalvamp
Prole
Posts: 3
Joined: Sun Mar 20, 2016 11:47 pm

Re: LÖVE-Nuklear - a lightweight immediate mode GUI

Loving it so far, however I'm confused on how to handle textinput, there is no example of this either.

Does anyone have an example on how to get every text input into a text input?

keharriso
Citizen
Posts: 73
Joined: Fri Nov 16, 2012 9:34 pm

Re: LÖVE-Nuklear - a lightweight immediate mode GUI

The edit widget is probably what you're looking for.

Simple example:

Code: Select all

local nuklear = require 'nuklear'

local ui

function love.load()
love.keyboard.setKeyRepeat(true)
ui = nuklear.newUI()
end

local edit = {value = 'Hello, world!'}

function love.update(dt)
ui:frameBegin()
if ui:windowBegin('Text Input', 100, 100, 200, 80,
'border', 'title', 'movable') then
ui:layoutRow('dynamic', 30, 1)
local state, changed = ui:edit('field', edit)
if changed then
print(edit.value)
end
end
ui:windowEnd()
ui:frameEnd()
end

function love.draw()
ui:draw()
end

function love.keypressed(key, scancode, isrepeat)
ui:keypressed(key, scancode, isrepeat)
end

function love.keyreleased(key, scancode)
ui:keyreleased(key, scancode)
end

function love.mousepressed(x, y, button, istouch, presses)
ui:mousepressed(x, y, button, istouch, presses)
end

function love.mousereleased(x, y, button, istouch, presses)
ui:mousereleased(x, y, button, istouch, presses)
end

function love.mousemoved(x, y, dx, dy, istouch)
ui:mousemoved(x, y, dx, dy, istouch)
end

function love.textinput(text)
ui:textinput(text)
end

function love.wheelmoved(x, y)
ui:wheelmoved(x, y)
end

LÖVE-Nuklear - a lightweight immediate mode GUI for LÖVE games

ingsoc451
Citizen
Posts: 74
Joined: Sat Feb 06, 2016 9:42 pm
Location: Oceania

Re: LÖVE-Nuklear - a lightweight immediate mode GUI

I made a rough comparison of their cpu usage (at 60fps)
gspot (demo screen) has the lowest
suit (couldn't find a demo: button spam screen) has slightly more cpu usage than gspot
loveframes (demo screen) use around 1.3 times more cpu
nuklear (demo screen with only calculator) has slightly more cpu usage than loveframes

I was expecting nuklear to perform better, maybe I did something wrong?
eom

keharriso
Citizen
Posts: 73
Joined: Fri Nov 16, 2012 9:34 pm

Re: LÖVE-Nuklear - a lightweight immediate mode GUI

ingsoc451 wrote:
Sat Feb 23, 2019 7:24 pm
I made a rough comparison of their cpu usage (at 60fps)
gspot (demo screen) has the lowest
suit (couldn't find a demo: button spam screen) has slightly more cpu usage than gspot
loveframes (demo screen) use around 1.3 times more cpu
nuklear (demo screen with only calculator) has slightly more cpu usage than loveframes

I was expecting nuklear to perform better, maybe I did something wrong?
It's not entirely unexpected that LÖVE-Nuklear performs slightly worse than pure-Lua alternatives. This could be for any number of reasons. For one, a pure Lua library doesn't need to cross the Lua/C boundary, while LÖVE-Nuklear passes it many times, at least once for every call. For another, LÖVE-Nuklear does extensive argument checking and assertions with every call. There are also probably many possibilities I can't think of at the moment.

I will say that performance is secondary in priority to simplicity and flexibility. Nuklear has a very strong styling system, and I try to keep the API as clean as possible. Maybe one day someone (perhaps me) will re-write Nuklear in pure Lua and see if it's any faster. For the moment, however, it's working perfectly for my project.

Also, the entirety of LÖVE-Nuklear is a single C file, so if anyone wants to help improve LÖVE-Nuklear's performance, you know exactly where to start.

EDIT: I did some side-by-side comparisons and it looks like Nuklear is also drawing more than, say, Gspot. Nuklear does window borders, title bar backgrounds, rounded buttons with borders, etc. If you haven't included these things in your tests, they may be something to consider. For example, the calculator takes roughly 50 draw calls to render while the Gspot demo looks like it takes close to half that.

I tried a demo of 50 windows with 2 labels and 2 buttons each. With window title and borders, the FPS was 240. Without window title and window borders, the FPS was 300. That's not counting the performance of button borders.

It's also possible that using LuaJIT FFI would be faster than the plain C module.

I would encourage anyone looking into any sort of performance issues (in this case related to the GUI) to ensure they aren't optimizing prematurely. At the end of the day, does it really matter that you can only render 50 windows 240 times every second? In most cases I think you'll find the ease of use of the libraries trumps the performance considerations.
LÖVE-Nuklear - a lightweight immediate mode GUI for LÖVE games

Frenchgui
Prole
Posts: 2
Joined: Mon Feb 25, 2019 10:46 pm

Re: LÖVE-Nuklear - a lightweight immediate mode GUI

Hi keharriso, thanks a lot for all your work (binding and docs!). Just a question: how can I minimize a window at start, when I use ui:windowCollapse(mywindowname) once at start I can't expand it manually?

keharriso
Citizen
Posts: 73
Joined: Fri Nov 16, 2012 9:34 pm

Re: LÖVE-Nuklear - a lightweight immediate mode GUI

Frenchgui wrote:
Mon Feb 25, 2019 10:54 pm
Hi keharriso, thanks a lot for all your work (binding and docs!). Just a question: how can I minimize a window at start, when I use ui:windowCollapse(mywindowname) once at start I can't expand it manually?
Thanks for the kind words.

You need to keep track of whether or not the window has been collapsed yet or not. I did this in the following example with the "collapse" variable.

Code: Select all

local collapse = true
function love.update(dt)
ui:frameBegin()
if ui:windowBegin('Collapse Example', 100, 100, 200, 150,
'border', 'title', 'movable', 'minimizable') then
ui:layoutRow('dynamic', 30, 1)
ui:label('Hello, world!')
end
ui:windowEnd()
if collapse then
collapse = false
ui:windowCollapse('Collapse Example')
end
ui:frameEnd()
end

LÖVE-Nuklear - a lightweight immediate mode GUI for LÖVE games

Frenchgui
Prole
Posts: 2
Joined: Mon Feb 25, 2019 10:46 pm

Re: LÖVE-Nuklear - a lightweight immediate mode GUI

Oh! Thanks everything is working now..

CrimsonGuy
Prole
Posts: 38
Joined: Thu Apr 04, 2019 3:32 pm

Re: LÖVE-Nuklear - a lightweight immediate mode GUI

For some reason i cant compile this on Ubuntu 18.04 even tho i have LuaJit and Cmake i get this error

Code: Select all

cmake -DCMAKE_BUILD_TYPE=Release ../love-nuklear
CMake Error at /usr/share/cmake-3.10/Modules/FindPackageHandleStandardArgs.cmake:137 (message):
Could NOT find LuaJIT (missing: LUA_LIBRARIES)
Call Stack (most recent call first):
/usr/share/cmake-3.10/Modules/FindPackageHandleStandardArgs.cmake:378 (_FPHSA_FAILURE_MESSAGE)
cmake/FindLuaJIT.cmake:59 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)
CMakeLists.txt:5 (FIND_PACKAGE)

-- Configuring incomplete, errors occurred!

I found this bug, but workaround doesn't seem to be working for me or maybe im pointing to the wrong direction

https://github.com/minetest/minetest/issues/7306

cmake -DLUA_INCLUDE_DIR=/usr/lib/x86_64-linux-gnu/ -DCMAKE_BUILD_TYPE=Release ../love-nuklear

I swear for some reason cmake always gives me troubles its like a curse or something

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