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Lightweight immediate mode GUI for LÖVE games
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README.md

README.md

LÖVE-Nuklear

Nuklear module for the LÖVE game engine.

Provides a lightweight immediate mode GUI for LÖVE games.

Example

-- Simple UI example.

local nuklear = require 'nuklear'

local ui

function love.load()
	ui = nuklear.newUI()
end

local combo = {value = 1, items = {'A', 'B', 'C'}}

function love.update(dt)
	ui:frameBegin()
	if ui:windowBegin('Simple Example', 100, 100, 200, 160,
			'border', 'title', 'movable') then
		ui:layoutRow('dynamic', 30, 1)
		ui:label('Hello, world!')
		ui:layoutRow('dynamic', 30, 2)
		ui:label('Combo box:')
		if ui:combobox(combo, combo.items) then
			print('Combo!', combo.items[combo.value])
		end
		ui:layoutRow('dynamic', 30, 3)
		ui:label('Buttons:')
		if ui:button('Sample') then
			print('Sample!')
		end
		if ui:button('Button') then
			print('Button!')
		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

Building

Windows binaries are available for each release.

To build the library yourself, grab the code with:

$ git clone --recursive https://github.com/keharriso/love-nuklear.git

Next, you need to compile the code to a native Lua module.

Compiling with CMake on Linux

  1. First, ensure you have a C compiler and the cmake and luajit or lua51-luajit (for openSUSE) packages installed, as well as libluajit-5.1-dev (for Ubuntu/Debian), luajit-devel (for Fedora), or lua51-luajit-devel (for openSUSE) if your distro has one of these packages.
  2. Create a new folder next to love-nuklear called love-nuklear-build.
  3. Open a terminal inside love-nuklear-build.
  4. Compile the library with
$ cmake -DCMAKE_BUILD_TYPE=Release ../love-nuklear
$ make
  1. Locate nuklear.so in the build folder.

Compiling with CMake and MinGW on Windows

  1. Install CMake and MinGW or MinGW-w64.
  2. Download the source code for LuaJIT.
  3. Open a command window inside the LuaJIT folder (the one that contains "README").
  4. Compile LuaJIT with
$ mingw32-make
  1. Remember the path to lua51.dll inside the LuaJIT src folder.
  2. Run the CMake GUI.
  3. Click "Browse Source" at the top right, then select the love-nuklear folder.
  4. Enter a path for the build folder. It should be separate from the source folder.
  5. Press "Configure" at the bottom.
  6. Select "MinGW Makefiles" from the generator drop list, then click "Finish".
  7. You should receive an error. This is normal.
  8. Open the LUA tree by clicking the triangle on the left.
  9. Replace "LUA_INCLUDE_DIR-NOTFOUND" with the path to the LuaJIT src folder.
  10. Replace "LUA_LIBRARY-NOTFOUND" with the path to lua51.dll inside the LuaJIT src folder.
  11. Click "Generate" at the bottom.
  12. Open a command window inside the build folder.
  13. Compile with
$ mingw32-make
  1. Locate nuklear.dll inside the build folder.

Documentation

A complete description of all functions and style properties, alongside additional examples, is available at the LÖVE-Nuklear wiki.

License

Copyright (c) 2016 Kevin Harrison, released under the MIT License (see LICENSE for details).

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