Scenes for Solar2D

This is a simpler, instanced scene manager for Solar2D (formerly CoronaSDK) and is designed to allow for multiple concurrent scenes. For example a HUD scene that lives above a game scene that’s persistent and multiple modal dialogs that stack and close in the order they are created.

Also, there’s a simple fade in/out transition that uses a screen overlay and can be expanded to support any style of layered screen transition.

It's not as full featured as composer or storyBoard but it's extendable as needed.

Examples

Create a new scene:

local scenes = require "scenes"
local template = scenes.new("scenes.template")
scenes.show("template", {transition = "fade", time = 250 })

Show a new modal:

scenes.new("scenes.modal", { name = "modal", modal = true, dim = 0.5 })
scenes.show("modal")

Hide and remove:

scenes.hide("template", {transition = "fade", time = 250 })
scenes.remove("template", {collectgarbage = true})

Base scene template:

-- Scenes: scene template

local scenes = require "scenes"
local scene = {}

-- set a more friendly name, or required filename is used
-- can be overwritten on new() with name = "instanceName"
scene.name = "template"

-- variables local to scene
local image

function scene:create(event)
  local options = event.options or {}
  local view = scene.view

  -- add addtional groups here
  scene.hud = display.newGroup()
  scene.view:insert(scene.hud)

  -- load all your sound, images, files, etc. here
  image = display.newCircle(view, 0, 0 , 128)

  print("Created scene", self.name)
end

function scene:resize(event)
  -- place all your graphics and images here
  image.x, image.y = display.contentCenterX, display.contentCenterY
  print("Resized scene", self.name)

end

function scene:show(event)
  local options = event.options or {}
  -- automatically calls resize(), start timers, game loop etc.
  if event.phase == "began" then
    print("Began showing scene", self.name)

  elseif event.phase == "ended" then
    print("Finished showing scene", self.name)
    -- you could resume here
    self:resume()
  end
end

function scene:pause()
  -- add things here that might need to pause, must be called manually
  scene.paused = true
end

function scene:resume()
  -- restart things here that might needed to pause, must be called manually
  scene.paused = false
end

function scene:enterFrame(event)
  -- called every frame

  if scene.view.isVisible then return end
  -- if scene is hidden don't do these things

  if scene.paused then return end
  -- if scene paused don't do these things
end

function scene:hide(event)
  local options = event.options or {}
  -- called when scene gets hidden
  if event.phase == "began" then
    print("Began hiding scene", self.name)

  elseif event.phase == "ended" then
    print("Finished hiding scene", self.name)
    -- you could pause here to save resources
    self:pause()
  end
end

function scene:finalize(event)
  -- optional, gets called when scene view gets removed
  -- use scenes.remove() to safely start the process
  print("Scene finalized", self.name)

end

function scene:destroy()
  -- optional, gets called before module set to nil
  print("Scene destroyed", self.name)

end

return scene