View source for Tuto tiny-ecs beatemup Part 3 transitions menu options

__TOC__

We quickly go through the '''Transitions''' Class, the '''Menu''' scene and the '''Options''' scene as they were covered in the '''Gideros Game Template1 Tutorial''' and we are only getting started ;-)

== the transitions.lua file ==
The transitions Class controls all scenes transitions. It plays an essential role in the flow of the game. I put the code here in case it is different from the Gideros Game Template1.

The code:
<syntaxhighlight lang="lua">
Transitions = Core.class(Sprite)

function Transitions:init(xnextscene)
	self.nextscene = xnextscene
	-- a movieclip for transitions (you can change it to anything you want!)
	local pixel = Pixel.new(g_ui_theme.pixelcolorup, 1, myappwidth, myappheight)
	local mc = MovieClip.new{{ -- you choose the duration, the effects, ...
		1, 50, pixel, -- duration: 64, 32
		{
			y = { 0, myappheight, tweens[31] }, -- tweens[math.random(#tweens)]
			alpha = { 1, 0, tweens[19] }, -- tweens[math.random(#tweens)]
		}
	}}
	mc:play() -- play only once
	-- position
	mc:setPosition(myappleft, myapptop) -- for mobile
	-- order
	self:addChild(mc)
	-- listeners
	mc:addEventListener(Event.COMPLETE, function()
		self:gotoScene(self.nextscene)
	end)
	-- let's go
--	self:myKeysPressed() -- optional
end

-- cut the transition (optional)
function Transitions:myKeysPressed()
	self:addEventListener(Event.KEY_DOWN, function(e)
		if e.keyCode == KeyCode.ESC or e.keyCode == KeyCode.ENTER or
			e.keyCode == KeyCode.SPACE or e.keyCode == g_keyaction1 then
			self:gotoScene(self.nextscene)
		end
	end)
end

-- scenes navigation
function Transitions:gotoScene(xnextscene)
	-- unload current assets
	stage:removeAllListeners()
	for i = stage:getNumChildren(), 1, -1 do
		stage:getChildAt(i):removeAllListeners()
		stage:removeChildAt(i)
	end collectgarbage()
	-- load next scene (eg.: Menu.new())
	stage:addChild(xnextscene)
end
</syntaxhighlight>

== transitions.lua Code comments ==
The transitions Class takes 1 argument, that is the next scene to be loaded.

There is one MovieClip which plays a fade animation. Feel free to change it to anything you like or change the duration of the clip.

When the fading animation is done, all the previous Sprites and their eventual listeners are removed from memory and the new scene is added to the stage.

== the menu.lua file ==
The '''menu.lua''' file is the same as the one in Gideros Game Template1. We add some buttons to our menu you can navigate with the mouse and the keyboard.

The code:
<syntaxhighlight lang="lua">
Menu = Core.class(Sprite)

function Menu:init()
	-- bg
	application:setBackgroundColor(g_ui_theme.backgroundcolor)
	-- init
	local sndbtn = {sound=Sound.new("audio/ui/sfx_sounds_button1.wav"), time=0, delay=0.2}
	local sfxvolume = g_sfxvolume * 0.01 -- sound between 0 and 1
	local tooltiplayer = Sprite.new()
	local difficulty = g_difficulty
	if difficulty >= 2 then difficulty = "hard"
	elseif difficulty >= 1 then difficulty = "normal"
	else difficulty = "easy"
	end
	-- buttons
	local mybtnstart = ButtonMonster.new({
		autoscale=false, pixelwidth=20*8, pixelheight=8*8,
		pixelscalexup=0.8, pixelscalexdown=0.9,
		pixelcolorup=g_ui_theme.pixelcolorup, pixelcolordown=g_ui_theme.pixelcolordown,
		text="START", ttf=myttf, textcolorup=g_ui_theme.textcolorup, textcolordown=g_ui_theme.textcolordown,
		sound=sndbtn, volume=sfxvolume,
		tooltiptext=difficulty, tooltipttf=myttf, tooltiptextcolor=g_ui_theme.tooltiptextcolor,
		tooltipoffsetx=g_ui_theme.tooltipoffsetx-1.7*8, tooltipoffsety=g_ui_theme.tooltipoffsety+0.5*8,
	}, 1, tooltiplayer)
	local mybtnoptions = ButtonMonster.new({
		autoscale=false, pixelwidth=20*8, pixelheight=8*8,
		pixelscalexup=0.8, pixelscalexdown=0.9,
		pixelcolorup=g_ui_theme.pixelcolorup, pixelcolordown=g_ui_theme.pixelcolordown,
		text="OPTIONS", ttf=myttf, textcolorup=g_ui_theme.textcolorup, textcolordown=g_ui_theme.textcolordown,
		sound=sndbtn, volume=sfxvolume,
	}, 2)
	local mybtnexit = ButtonMonster.new({
		autoscale=false, pixelwidth=20*8, pixelheight=8*8,
		pixelscalexup=0.8, pixelscalexdown=0.9,
		pixelcolorup=g_ui_theme.pixelcolorup, pixelcolordown=g_ui_theme.exit,
		text="EXIT", ttf=myttf, textcolorup=g_ui_theme.textcolorup, textcolordown=g_ui_theme.textcolordown,
		sound=sndbtn, volume=sfxvolume,
	}, 3)
	-- buttons table for keyboard navigation
	self.btns = {}
	self.btns[#self.btns + 1] = mybtnstart
	self.btns[#self.btns + 1] = mybtnoptions
	self.btns[#self.btns + 1] = mybtnexit
	self.selector = 1 -- starting button
	-- position
	mybtnstart:setPosition(12*myappwidth/16+myappleft, 4*myappheight/16)
	mybtnoptions:setPosition(12*myappwidth/16+myappleft, 8*myappheight/16)
	mybtnexit:setPosition(12*myappwidth/16+myappleft, 13*myappheight/16)
	-- order
	for k, v in ipairs(self.btns) do self:addChild(v) end
	self:addChild(tooltiplayer)
	-- buttons listeners
	for k, v in ipairs(self.btns) do
		v:addEventListener("clicked", function() self.selector = k self:buttonsAction() end)
		v:addEventListener("hovered", function(e) self.selector = e.currselector end)
		v.btns = self.btns -- for keyboard navigation
	end
	-- let's go
	local function fun()
		-- called async otherwise may crash the app
		self:updateButtons()
		Core.yield(1)
	end
	Core.asyncCall(fun)
	self:myKeysPressed()
end

-- update buttons state
function Menu:updateButtons()
	for k, v in ipairs(self.btns) do
		v.currselector = self.selector
		v:updateVisualState()
		if k == self.selector then v:selectionSfx() end -- play sound on keyboard navigation
	end
end

-- keyboard navigation
function Menu:myKeysPressed()
	self:addEventListener(Event.KEY_DOWN, function(e)
		-- keyboard navigation
		if e.keyCode == KeyCode.UP or e.keyCode == g_keyup or
			e.keyCode == KeyCode.LEFT or e.keyCode == g_keyleft then
			self.selector -= 1 if self.selector < 1 then self.selector = #self.btns end
			self:updateButtons()
		elseif e.keyCode == KeyCode.DOWN or e.keyCode == g_keydown or
			e.keyCode == KeyCode.RIGHT or e.keyCode == g_keyright then
			self.selector += 1 if self.selector > #self.btns then self.selector = 1 end
			self:updateButtons()
		elseif e.keyCode == KeyCode.SPACE or e.keyCode == g_keyaction1 then
			self:buttonsAction()
		elseif e.keyCode == KeyCode.ESC or e.keyCode == KeyCode.BACK then
--			if not application:isPlayerMode() then application:exit() else print("EXIT") end
		end
		-- modifier
		local modifier = application:getKeyboardModifiers()
		local alt = (modifier & KeyCode.MODIFIER_ALT) > 0
		if not alt and e.keyCode == KeyCode.ENTER then self:buttonsAction()
		elseif alt and e.keyCode == KeyCode.ENTER then -- switch full screen
			if not application:isPlayerMode() then
				ismyappfullscreen = not ismyappfullscreen
				application:setFullScreen(ismyappfullscreen)
			end
		end
	end)
end

-- buttons action
function Menu:buttonsAction()
	for k, v in ipairs(self.btns) do
		if k == self.selector then
			if v.isdisabled then -- nothing here
				print("btn disabled!", k)
			elseif k == 1 then
				switchToScene(LevelX.new()) -- LevelX
			elseif k == 2 then
				switchToScene(Options.new()) -- Options
			elseif k == 3 then -- EXIT
				if not application:isPlayerMode() then
					stage:removeAllListeners()
					for i = stage:getNumChildren(), 1, -1 do
						stage:getChildAt(i):removeAllListeners()
						stage:removeChildAt(i)
					end collectgarbage()
					-- exit
					application:exit()
				else
					print("Exit button ", k)
				end
			end
		end
	end
end
</syntaxhighlight>

== main.lua Code comments ==
The only thing I could say is calling the ''self:updateButtons()'' function asynchronously so we let the menu fully load before calling an update on the buttons.

== the options.lua file ==
This is the longest file of them and it should be similar to the one in the Gideros Game Template1. Here we implement the key remapping system and we save the user's preferences to file.

The code:
<syntaxhighlight lang="lua">
Options = Core.class(Sprite)

local keyNames = { -- display nice KeyCode name
  [KeyCode.LEFT] = "LEFT",
  [KeyCode.RIGHT] = "RIGHT",
  [KeyCode.UP] = "UP",
  [KeyCode.DOWN] = "DOWN",
  [KeyCode.NUM0] = "NUMPAD 0",
  [KeyCode.NUM1] = "NUMPAD 1",
  [KeyCode.NUM2] = "NUMPAD 2",
  [KeyCode.NUM3] = "NUMPAD 3",
  [KeyCode.NUM4] = "NUMPAD 4",
  [KeyCode.NUM5] = "NUMPAD 5",
  [KeyCode.NUM6] = "NUMPAD 6",
  [KeyCode.NUM7] = "NUMPAD 7",
  [KeyCode.NUM8] = "NUMPAD 8",
  [KeyCode.NUM9] = "NUMPAD 9",
  [KeyCode.SPACE] = "SPACE",
  [KeyCode.SHIFT] = "SHIFT",
  [KeyCode.CTRL] = "CONTROL",
  [KeyCode.ALT] = "ALT",
  [KeyCode.TAB] = "TAB",
}

function Options:init()
	-- bg
	application:setBackgroundColor(g_ui_theme.backgroundcolor)
	-- TITLE
	self.mytitle = ButtonMonster.new({
		autoscale=false, pixelwidth=16*8, pixelheight=4*8,
		pixelcolorup=0xaaaaaa,
		text="OPTIONS", ttf=myttf,
	})
	-- SLIDERS
	local slitcolor, knobcolor = g_ui_theme.pixelcolorup, g_ui_theme.pixelcolordown
	self.bgmvolumeslider = ASlider.new({
		initialvalue=g_bgmvolume, maximum=100, --steps=2,
		slitcolor=slitcolor, slitalpha=1, slitw=5*myappwidth/10, slith=24,
		knobcolor=knobcolor, knobalpha=0.6, knobw=12, knobh=26,
		text="BGM VOLUME: ", textscale=2, textoffsetx=-26*8, textoffsety=7,
		id=1,
	})
	self.sfxvolumeslider = ASlider.new({
		initialvalue=g_sfxvolume, maximum=100, --steps=2,
		slitcolor=slitcolor, slitalpha=1, slitw=5*myappwidth/10, slith=24,
		knobcolor=knobcolor, knobalpha=0.6, knobw=12, knobh=26,
		text="SFX VOLUME: ", textscale=2, textoffsetx=-26*8, textoffsety=7,
		id=2,
	})
	self.difficultyslider = ASlider.new({
		initialvalue=g_difficulty, maximum=2, --steps=2,
		slitcolor=slitcolor, slitalpha=1, slitw=5*myappwidth/10, slith=24,
		knobcolor=knobcolor, knobalpha=0.6, knobw=12, knobh=26,
		text="DIFFICULTY: ", textscale=2, textoffsetx=-26*8, textoffsety=7, textrotation=0,
		id=3,
	})
	-- position
	self.mytitle:setPosition(myappwidth/2, 0.75*myappheight/10)
	self.bgmvolumeslider:setPosition(29*8, 2.5*myappheight/10)
	self.sfxvolumeslider:setPosition(29*8, 3.5*myappheight/10)
	self.difficultyslider:setPosition(29*8, 4.5*myappheight/10)
	-- order
	self:addChild(self.mytitle)
	self:addChild(self.bgmvolumeslider)
	self:addChild(self.sfxvolumeslider)
	self:addChild(self.difficultyslider)
	-- tooltip layer
	local tooltiplayer = Sprite.new()
	-- buttons
	local key
	self.sfxsound = {sound=Sound.new("audio/ui/sfx_sounds_button1.wav"), time=0, delay=0.2}
	self.sfxvolume = g_sfxvolume * 0.01
	-- movement
	if (keyNames[g_keyleft] or 0) == 0 then key = utf8.char(g_keyleft)
	else key = keyNames[g_keyleft] -- display nice KeyCode name
	end
	self.btnLEFT = ButtonMonster.new({
		autoscale=false, pixelwidth=17*8, pixelheight=6*8,
		pixelscalexup=0.8, pixelscalexdown=0.9,
		pixelcolorup=g_ui_theme.pixelcolorup, pixelcolordown=g_ui_theme.pixelcolordown,
		text=key, ttf=myttf, textcolorup=g_ui_theme.textcolorup, textcolordown=g_ui_theme.textcolordown,
		sound=self.sfxsound, volume=self.sfxvolume,
		tooltiptext="left", tooltipttf=myttf, tooltiptextcolor=g_ui_theme.tooltiptextcolor,
		tooltipoffsetx=g_ui_theme.tooltipoffsetx, tooltipoffsety=g_ui_theme.tooltipoffsety,
	}, 2, tooltiplayer)
	if (keyNames[g_keyright] or 0) == 0 then key = utf8.char(g_keyright)
	else key = keyNames[g_keyright] -- display nice KeyCode name
	end
	self.btnRIGHT = ButtonMonster.new({
		autoscale=false, pixelwidth=17*8, pixelheight=6*8,
		pixelscalexup=0.8, pixelscalexdown=0.9,
		pixelcolorup=g_ui_theme.pixelcolorup, pixelcolordown=g_ui_theme.pixelcolordown,
		text=key, ttf=myttf, textcolorup=g_ui_theme.textcolorup, textcolordown=g_ui_theme.textcolordown,
		sound=self.sfxsound, volume=self.sfxvolume,
		tooltiptext="right", tooltipttf=myttf, tooltiptextcolor=g_ui_theme.tooltiptextcolor,
		tooltipoffsetx=g_ui_theme.tooltipoffsetx, tooltipoffsety=g_ui_theme.tooltipoffsety,
	}, 3, tooltiplayer)
	if (keyNames[g_keyup] or 0) == 0 then key = utf8.char(g_keyup)
	else key = keyNames[g_keyup] -- display nice KeyCode name
	end
	self.btnUP = ButtonMonster.new({
		autoscale=false, pixelwidth=17*8, pixelheight=6*8,
		pixelscalexup=0.8, pixelscalexdown=0.9,
		pixelcolorup=g_ui_theme.pixelcolorup, pixelcolordown=g_ui_theme.pixelcolordown,
		text=key, ttf=myttf, textcolorup=g_ui_theme.textcolorup, textcolordown=g_ui_theme.textcolordown,
		sound=self.sfxsound, volume=self.sfxvolume,
		tooltiptext="up", tooltipttf=myttf, tooltiptextcolor=g_ui_theme.tooltiptextcolor,
		tooltipoffsetx=g_ui_theme.tooltipoffsetx, tooltipoffsety=g_ui_theme.tooltipoffsety,
	}, 1, tooltiplayer)
	if (keyNames[g_keydown] or 0) == 0 then key = utf8.char(g_keydown)
	else key = keyNames[g_keydown] -- display nice KeyCode name
	end
	self.btnDOWN = ButtonMonster.new({
		autoscale=false, pixelwidth=17*8, pixelheight=6*8,
		pixelscalexup=0.8, pixelscalexdown=0.9,
		pixelcolorup=g_ui_theme.pixelcolorup, pixelcolordown=g_ui_theme.pixelcolordown,
		text=key, ttf=myttf, textcolorup=g_ui_theme.textcolorup, textcolordown=g_ui_theme.textcolordown,
		sound=self.sfxsound, volume=self.sfxvolume,
		tooltiptext="down", tooltipttf=myttf, tooltiptextcolor=g_ui_theme.tooltiptextcolor,
		tooltipoffsetx=g_ui_theme.tooltipoffsetx, tooltipoffsety=g_ui_theme.tooltipoffsety,
	}, 4, tooltiplayer)
	-- actions
	if (keyNames[g_keyaction1] or 0) == 0 then key = utf8.char(g_keyaction1)
	else key = keyNames[g_keyaction1] -- display nice KeyCode name
	end
	self.btnACTION1 = ButtonMonster.new({
		autoscale=false, pixelwidth=17*8, pixelheight=6*8,
		pixelscalexup=0.8, pixelscalexdown=0.9,
		pixelcolorup=g_ui_theme.pixelcolorup, pixelcolordown=g_ui_theme.pixelcolordown,
		text=key, ttf=myttf, textcolorup=g_ui_theme.textcolorup, textcolordown=g_ui_theme.textcolordown,
		sound=self.sfxsound, volume=self.sfxvolume,
		tooltiptext="punch", tooltipttf=myttf, tooltiptextcolor=g_ui_theme.tooltiptextcolor,
		tooltipoffsetx=g_ui_theme.tooltipoffsetx, tooltipoffsety=g_ui_theme.tooltipoffsety,
	}, 5, tooltiplayer)
	if (keyNames[g_keyaction2] or 0) == 0 then key = utf8.char(g_keyaction2)
	else key = keyNames[g_keyaction2] -- display nice KeyCode name
	end
	self.btnACTION2 = ButtonMonster.new({
		autoscale=false, pixelwidth=17*8, pixelheight=6*8,
		pixelscalexup=0.8, pixelscalexdown=0.9,
		pixelcolorup=g_ui_theme.pixelcolorup, pixelcolordown=g_ui_theme.pixelcolordown,
		text=key, ttf=myttf, textcolorup=g_ui_theme.textcolorup, textcolordown=g_ui_theme.textcolordown,
		sound=self.sfxsound, volume=self.sfxvolume,
		tooltiptext="kick", tooltipttf=myttf, tooltiptextcolor=g_ui_theme.tooltiptextcolor,
		tooltipoffsetx=g_ui_theme.tooltipoffsetx, tooltipoffsety=g_ui_theme.tooltipoffsety,
	}, 6, tooltiplayer)
	if (keyNames[g_keyaction3] or 0) == 0 then key = utf8.char(g_keyaction3)
	else key = keyNames[g_keyaction3] -- display nice KeyCode name
	end
	self.btnACTION3 = ButtonMonster.new({
		autoscale=false, pixelwidth=17*8, pixelheight=6*8,
		pixelscalexup=0.8, pixelscalexdown=0.9,
		pixelcolorup=g_ui_theme.pixelcolorup, pixelcolordown=g_ui_theme.pixelcolordown,
		text=key, ttf=myttf, textcolorup=g_ui_theme.textcolorup, textcolordown=g_ui_theme.textcolordown,
		sound=self.sfxsound, volume=self.sfxvolume,
		tooltiptext="jump", tooltipttf=myttf, tooltiptextcolor=g_ui_theme.tooltiptextcolor,
		tooltipoffsetx=g_ui_theme.tooltipoffsetx, tooltipoffsety=g_ui_theme.tooltipoffsety,
	}, 7, tooltiplayer)
	-- btn menu
	self.btnMENU = ButtonMonster.new({
		autoscale=false, pixelwidth=12*8, pixelheight=6*8,
		pixelscalexup=0.8, pixelscalexdown=0.9,
		pixelcolorup=g_ui_theme.pixelcolorup, pixelcolordown=g_ui_theme.pixelcolordown,
		text="MENU", ttf=myttf, textcolorup=0x0009B3, textcolordown=0x45d1ff,
		sound=self.sfxsound, volume=self.sfxvolume,
		tooltiptext="Enter", tooltipttf=myttf, tooltiptextcolor=g_ui_theme.tooltiptextcolor,
		tooltipoffsetx=g_ui_theme.tooltipoffsetx, tooltipoffsety=g_ui_theme.tooltipoffsety,
	}, 8, tooltiplayer)
	-- put the btns in a table for keyboard navigation
	self.btns = {}
	self.btns[#self.btns + 1] = self.btnUP -- 1
	self.btns[#self.btns + 1] = self.btnLEFT -- 2
	self.btns[#self.btns + 1] = self.btnRIGHT -- 3
	self.btns[#self.btns + 1] = self.btnDOWN -- 4
	self.btns[#self.btns + 1] = self.btnACTION1 -- 5
	self.btns[#self.btns + 1] = self.btnACTION2 -- 6
	self.btns[#self.btns + 1] = self.btnACTION3 -- 7
	self.btns[#self.btns + 1] = self.btnMENU -- 8
	self.selector = 1 -- starting button
	self.iskeyboardnavigation = false
	-- position
	self.btnLEFT:setPosition(2.5*myappwidth/10+myappleft, 6*8+6*myappheight/10)
	self.btnRIGHT:setPosition(4.5*myappwidth/10+myappleft, 6*8+6*myappheight/10)
	self.btnUP:setPosition(3.5*myappwidth/10+myappleft, 6*8+4.6*myappheight/10)
	self.btnDOWN:setPosition(3.5*myappwidth/10+myappleft, 6*8+7.4*myappheight/10)
	for i = 5, 7 do -- buttons actions
		self.btns[i]:setPosition(7.6*myappwidth/10+myappleft, (i-5)*6*8+6*myappheight/10)
	end
	self.btnMENU:setPosition(myappwidth-self.btnMENU:getWidth()/2+myappleft, myappheight-self.btnMENU:getHeight()/2)
	-- order
	for k, v in ipairs(self.btns) do self:addChild(v) end
	self:addChild(tooltiplayer) -- last add tooltip layer
	-- sliders listeners
	self.bgmvolumeslider:addEventListener("value_just_changed", self.onValueJustChanged, self)
	self.bgmvolumeslider:addEventListener("value_changing", self.onValueChanging, self)
	self.bgmvolumeslider:addEventListener("value_changed", self.onValueChanged, self)
	self.sfxvolumeslider:addEventListener("value_just_changed", self.onValueJustChanged, self)
	self.sfxvolumeslider:addEventListener("value_changing", self.onValueChanging, self)
	self.sfxvolumeslider:addEventListener("value_changed", self.onValueChanged, self)
	self.difficultyslider:addEventListener("value_just_changed", self.onValueJustChanged, self)
	self.difficultyslider:addEventListener("value_changing", self.onValueChanging, self)
	self.difficultyslider:addEventListener("value_changed", self.onValueChanged, self)
	-- buttons listeners
	for k, v in ipairs(self.btns) do
--		v:addEventListener("pressed", function(e) -- e.currselector, e.disabled
--			self.selector = k
--			self:buttonsAction()
--		end)
		v:addEventListener("clicked", function(e) -- e.currselector, e.disabled
			self:cancelKeyRemapping() -- setColorTransform, self.isremapping = false, updateButton()
			self.selector = k
			self:buttonsAction()
		end)
		v:addEventListener("hovered", function(e) -- e.currselector, e.disabled
			if not self.isremapping then
				self.selector = e.currselector
			end
		end)
		v.btns = self.btns -- for keyboard navigation
	end
	-- mouse listener
	self:addEventListener(Event.MOUSE_DOWN, function(e)
		if self:hitTestPoint(e.x, e.y) then -- cancel key remapping
			self.iskeyboardnavigation = false
			self:cancelKeyRemapping()
			e:stopPropagation()
		end
	end)
	-- let's go!
	self:difficulty(g_difficulty)
	self.isremapping = false
	local function fun()
		-- called async otherwise may crash the app
		self:updateButtons()
		Core.yield(1)
	end
	Core.asyncCall(fun)
	self:myKeysPressed()
end

-- sliders
function Options:difficulty(x) -- translate int to text
	if x >= 2 then self.difficultyslider.textfield:setText("DIFFICULTY: \e[color=#ddc]HARD\e[color]")
	elseif x >= 1 then self.difficultyslider.textfield:setText("DIFFICULTY: \e[color=#ddc]NORMAL\e[color]")
	else self.difficultyslider.textfield:setText("DIFFICULTY: \e[color=#ddc]EASY\e[color]")
	end
end
function Options:onValueJustChanged(e)
	self:cancelKeyRemapping()
	if e.id == 1 then -- bgm volume
		g_bgmvolume = e.value
		self.bgmvolumeslider:setValue(g_bgmvolume)
	elseif e.id == 2 then -- sfx volume
		g_sfxvolume = e.value
		self.sfxvolumeslider:setValue(g_sfxvolume)
	elseif e.id == 3 then -- difficulty
		g_difficulty = e.value
		self:difficulty(g_difficulty)
	end
end
function Options:onValueChanging(e)
	if e.id == 1 then -- bgm volume
		g_bgmvolume = e.value
		self.bgmvolumeslider:setValue(g_bgmvolume)
	elseif e.id == 2 then -- sfx volume
		g_sfxvolume = e.value
		self.sfxvolumeslider:setValue(g_sfxvolume)
	elseif e.id == 3 then -- difficulty
		self:difficulty(e.value)
	end
end
function Options:onValueChanged(e)
	if e.id == 1 then -- bgm volume
		g_bgmvolume = e.value
		local audio = Sound.new("audio/sfx/sfx_wpn_laser4.wav")
		local channel = audio:play() -- feedback
		if channel then channel:setVolume(g_bgmvolume*0.01) end
		self.bgmvolumeslider:setValue(g_bgmvolume)
	elseif e.id == 2 then -- sfx volume
		g_sfxvolume = e.value
		local audio = Sound.new("audio/sfx/sfx_wpn_laser4.wav")
		local channel = audio:play() -- feedback
		if channel then channel:setVolume(g_sfxvolume*0.01) end
		self.sfxvolumeslider:setValue(g_sfxvolume)
		for _, v in pairs(self.btns) do v:setVolume(g_sfxvolume*0.01) end -- change the ui buttons sfx volume
	elseif e.id == 3 then -- difficulty
		g_difficulty = e.value
		self:difficulty(g_difficulty)
	end
	mySavePrefs(g_configfilepath)
end

-- key remapping
function Options:remapKey(xbool)
	local btn = self.btns[self.selector]
	if xbool then btn:setColorTransform(255/255, 255/255, 0/255, 255/255)
	else btn:setColorTransform(255/255, 255/255, 255/255, 255/255)
	end
end
function Options:cancelKeyRemapping()
	self.isremapping = false
	self:remapKey(self.isremapping)
	self:updateButtons()
end

-- update buttons state
function Options:updateButtons()
	for k, v in ipairs(self.btns) do
		v.currselector = self.selector
		v:updateVisualState()
		if self.iskeyboardnavigation then
			if k == self.selector then v:selectionSfx() end -- play sound on keyboard navigation
		end
	end
end

-- keys handler
function Options:myKeysPressed()
	self:addEventListener(Event.KEY_DOWN, function(e)
		if self.isremapping then -- KEY REMAPPING
			if e.keyCode == KeyCode.ESC or e.keyCode == KeyCode.ENTER then
				self:cancelKeyRemapping()
				return
			end
			local keycode = e.keyCode
			local key = keyNames[keycode]
			if (keyNames[keycode] or 0) == 0 then key = utf8.char(keycode) end
			self.btns[self.selector]:changeText(key)
			if self.selector == 1 then g_keyup = keycode -- follows self.btns order
			elseif self.selector == 2 then g_keyleft = keycode -- follows self.btns order
			elseif self.selector == 3 then g_keyright = keycode -- follows self.btns order
			elseif self.selector == 4 then g_keydown = keycode -- follows self.btns order
			elseif self.selector == 5 then g_keyaction1 = keycode -- follows self.btns order
			elseif self.selector == 6 then g_keyaction2 = keycode -- follows self.btns order
			elseif self.selector == 7 then g_keyaction3 = keycode -- follows self.btns order
			end
			self:cancelKeyRemapping()
			mySavePrefs(g_configfilepath)
		else -- KEYBOARD NAVIGATION
			if e.keyCode == KeyCode.ESC or e.keyCode == KeyCode.BACK then switchToScene(Menu.new()) end
			-- keyboard
			if e.keyCode == KeyCode.UP or e.keyCode == g_keyup or e.keyCode == KeyCode.LEFT or e.keyCode == g_keyleft then
				self.selector -= 1 if self.selector < 1 then self.selector = #self.btns end
				self.iskeyboardnavigation = true
				self:updateButtons()
			elseif e.keyCode == KeyCode.DOWN or e.keyCode == g_keydown or e.keyCode == KeyCode.RIGHT or e.keyCode == g_keyright then
				self.selector += 1 if self.selector > #self.btns then self.selector = 1 end
				self.iskeyboardnavigation = true
				self:updateButtons()
			end
			-- modifier
			local modifier = application:getKeyboardModifiers()
			local alt = (modifier & KeyCode.MODIFIER_ALT) > 0
			if not alt and (e.keyCode == KeyCode.ENTER or e.keyCode == KeyCode.SPACE or e.keyCode == g_keyaction1) then
				self:buttonsAction()
			elseif alt and e.keyCode == KeyCode.ENTER then -- switch full screen
				if not application:isPlayerMode() then
					ismyappfullscreen = not ismyappfullscreen
					application:setFullScreen(ismyappfullscreen)
				end
			end
		end
	end)
end

-- buttons action
function Options:buttonsAction()
	self.isremapping = false
	for k, v in ipairs(self.btns) do
		if k == self.selector then
			if v.isdisabled then
				print("btn disabled!", k)
			elseif k >= 1 and k <= #self.btns-1 then -- action buttons
				self.isremapping = true
				self:remapKey(self.isremapping)
			elseif k == #self.btns then -- MENU button
				switchToScene(Menu.new())
			else
				print("nothing here!", k)
			end
		end
	end
end
</syntaxhighlight>

== options.lua Code comments ==
The code uses other Classes like '''aslider.lua''', '''buttonMonster.lua''', ... so make sure you have them (in the classes folder).

Maybe the names on the buttons are different from the Game Template1, other than that all should be good?

== Next? ==
We quickly went through what is already in the '''Gideros Game Template1''' tutorial. The next part is really where this beat'em up tutorial begins: the '''LevelX''' scene...


Prev.: [[Tuto tiny-ecs beatemup Part 2 Init and Main]]</br>
'''Next: [[Tuto tiny-ecs beatemup Part 4 LevelX]]'''


'''[[Tutorial - tiny-ecs beatemup]]'''
{{GIDEROS IMPORTANT LINKS}}