Allow multiple contexts to persist at once

example/main.lua

@@ -1,6 +1,6 @@
 -- Several simple examples.
 
-local nk = require 'nuklear'
+local nuklear = require 'nuklear'
 
 local calculator = require 'calculator'
 local draw = require 'draw'
@@ -8,49 +8,51 @@ local overview = require 'overview'
 local style = require 'style'
 local skin = require 'skin'
 
+local ui
+
 function love.load()
-	nk.init()
+	ui = nuklear.init()
 end
 
 function love.update(dt)
-	nk.frameBegin()
-		calculator()
-		style()
-		overview()
-		draw()
-		skin()
-	nk.frameEnd()
+	ui:frameBegin()
+		calculator(ui)
+		style(ui)
+		overview(ui)
+		draw(ui)
+		skin(ui)
+	ui:frameEnd()
 end
 
 function love.draw()
-	nk.draw()
+	ui:draw()
 	love.graphics.print("Current FPS: "..tostring(love.timer.getFPS( )), 10, 10)
 end
 
 function love.keypressed(key, scancode, isrepeat)
-	nk.keypressed(key, scancode, isrepeat)
+	ui:keypressed(key, scancode, isrepeat)
 end
 
 function love.keyreleased(key, scancode)
-	nk.keyreleased(key, scancode)
+	ui:keyreleased(key, scancode)
 end
 
 function love.mousepressed(x, y, button, istouch)
-	nk.mousepressed(x, y, button, istouch)
+	ui:mousepressed(x, y, button, istouch)
 end
 
 function love.mousereleased(x, y, button, istouch)
-	nk.mousereleased(x, y, button, istouch)
+	ui:mousereleased(x, y, button, istouch)
 end
 
 function love.mousemoved(x, y, dx, dy, istouch)
-	nk.mousemoved(x, y, dx, dy, istouch)
+	ui:mousemoved(x, y, dx, dy, istouch)
 end
 
 function love.textinput(text)
-	nk.textinput(text)
+	ui:textinput(text)
 end
 
 function love.wheelmoved(x, y)
-	nk.wheelmoved(x, y)
+	ui:wheelmoved(x, y)
 end