scene_menu.lua

local composer = require( "composer" )
local scene = composer.newScene()
local widget = require( "widget" )

-- -----------------------------------------------------------------------------------------------------------------
-- All code outside of the listener functions will only be executed ONCE unless "composer.removeScene()" is called.
-- -----------------------------------------------------------------------------------------------------------------

-- local forward references should go here

-- -------------------------------------------------------------------------------


-- "scene:create()"
function scene:create( event )

    local sceneGroup = self.view
    local lanes = {}

    -- Initialize the scene here.
    -- Example: add display objects to "sceneGroup", add touch listeners, etc.
    local background = display.newImageRect(sceneGroup, "images/background.png", 475, 713) -- display the background image object
        background.x = display.contentCenterX
        background.y = display.contentCenterY  

    local lanes = {} -- create a table called lanes
    for i=1,3 do -- loop 3 times to create 3 lanes for our game
        lanes[i] = display.newImageRect(sceneGroup, "images/lane.png", 79, 713)
        lanes[i].x = (display.contentCenterX - 79*2) + (i*80)
        lanes[i].y = display.contentCenterY
    end

    local logo = display.newImageRect(sceneGroup, "images/logo.png", 300, 150) -- create the logo image object
        logo.x = display.contentCenterX
        logo.y = 75
   
    local function handleButtonEvent( event ) -- create a function that responds to the button press of start playing
        if ( "ended" == event.phase ) then -- when the player lifts his or her finger from the button, that is known as the ended phase
            composer.gotoScene("scene_game", "slideLeft") -- move the player to the game scene
        end
    end

    local btn_startPlaying = widget.newButton {
        width = 220, -- this defines the width of the button
        height = 100, -- this defines the height of the button 
        defaultFile = "images/btn-blank.png", -- the image to be used in the normal state
        overFile = "images/btn-blank-over.png", -- the image to be used in the pressed state
        label = "Start Playing", -- the text to display on the button
        font = system.defaultFontBold, -- the font name to be used
        fontSize = 32, -- the size of the font
        labelColor = { default={ 0, 0, 0 }, over={ 0, 0, 0, 0.5 } }, -- the color of the label and the color when pressed
        onEvent = handleButtonEvent -- the name of the function to be called when the button is pressed
    }
    btn_startPlaying.x = display.contentCenterX -- position the button on the center of x axis
    btn_startPlaying.y = display.contentCenterY -- position the button on the center of y axis
    sceneGroup:insert(btn_startPlaying) -- insert button into sceneGroup for scene management

end


-- "scene:show()"
function scene:show( event )

    local sceneGroup = self.view
    local phase = event.phase

    if ( phase == "will" ) then
        -- Called when the scene is still off screen (but is about to come on screen).
    elseif ( phase == "did" ) then
        -- Called when the scene is now on screen.
        -- Insert code here to make the scene come alive.
        -- Example: start timers, begin animation, play audio, etc.
        local prevScene = composer.getSceneName( "previous" ) -- get the previous scene name, i.e. scene_game
        if(prevScene) then -- if the prevScene exists, then do something. This is only true when the player has went to the game scene
            composer.removeScene(prevScene) -- remove the previous scene so the player can play again
        end
    end
end


-- "scene:hide()"
function scene:hide( event )

    local sceneGroup = self.view
    local phase = event.phase

    if ( phase == "will" ) then
        -- Called when the scene is on screen (but is about to go off screen).
        -- Insert code here to "pause" the scene.
        -- Example: stop timers, stop animation, stop audio, etc.
    elseif ( phase == "did" ) then
        -- Called immediately after scene goes off screen.
    end
end


-- "scene:destroy()"
function scene:destroy( event )

    local sceneGroup = self.view

    -- Called prior to the removal of scene's view ("sceneGroup").
    -- Insert code here to clean up the scene.
    -- Example: remove display objects, save state, etc.
end


-- -------------------------------------------------------------------------------

-- Listener setup
scene:addEventListener( "create", scene )
scene:addEventListener( "show", scene )
scene:addEventListener( "hide", scene )
scene:addEventListener( "destroy", scene )

-- -------------------------------------------------------------------------------

return scene