This here is a screens class, you can add elements to it as shown in the main. It draws things in its box, and it can be resized and moved seamlessly. It takes one controlElement that it will send touches to and will run the draw of: this control element should be used to control the other elements, like the main part of a main menu, or the main code for a game. You can set up multiple screens, tween their x values for transitions, etc. also, you needn’t handle touches any differently in any of the elements: the screen takes in touches and automatically converts the x and y values to the range (0,WIDTH),(0,HEIGHT) no matter what size the screen is
Screen = class()
function Screen:init(pos,controlElement, elements, scalefactor)
self.scalefactor = scalefactor or 1
self.size = vec2(WIDTH*(scalefactor or 1),HEIGHT*(scalefactor or 1))
if controlElement and controlElement[1] then
self.controlElement = controlElement[1](unpack(controlElement[2] or {}))
elseif controlElement then
self.controlElement = controlElement
end
self.elements = elements or {}
self.pos = pos or vec2(0,0)
self.x,self.y = self.pos.x,self.pos.y
self.clipelements = true
self.active,self.drawing = true,true
end
function Screen:draw()
self.pos.x,self.pos.y = self.x,self.y
if self.controlElement and self.active then self.controlElement:draw() end
pushMatrix()
pushStyle()
scale(self.scalefactor)
translate(self.pos.x*(1/self.scalefactor),self.pos.y*(1/self.scalefactor))
clip(self.pos.x,self.pos.y, WIDTH*self.scalefactor,HEIGHT*self.scalefactor)
if self.drawing then
for a,b in pairs(self.elements) do
if b[1] then
b[1](unpack(b[2]))
else
b:draw()
end
end
end
popMatrix()
popStyle()
end
function Screen:touched(t)
if self.controlElement and self.active then
local px = (t.x-self.pos.x*(1/self.scalefactor))/self.scalefactor
local py = (t.y-self.pos.x*(1/self.scalefactor))/self.scalefactor
if px>0 and px < WIDTH and py >0 and py < HEIGHT then
self.controlElement:touched({x = px,y = py,id = t.id,state = t.state, tapCount = t.tapCount})
end
end
end
function Screen:move(vec2_move)
self.pos = self.pos + vec2_move
self.x,self.y = self.pos.x,self.pos.y
end
function Screen:addElement(tblorelem,argstbl,name)
local tab
if argstable then
tab = {tblorelem,argstbl}
tab.name = name
else
tab = tblorelem
tab.name = tblorelem[3]
end
table.insert(self.elements,tab)
end
function Screen:getElementList()
local v = 0
for a,b in pairs(self.elements) do
if b[1] then
print(a,b.name or "unnamed function","\
",unpack(b[2]))
else
print(a,b.name or "(Unnamed class).draw")
end
end
end
-- Screens Class
-- Use this function to perform your initial setup
function setup()
scr = Screen(vec2(20,20))
table.insert(scr.elements,{background,{0,0,255}})
table.insert(scr.elements,{ellipse,{WIDTH/2,HEIGHT/2,255}})
table.insert(scr.elements,Classtest())
scr.scalefactor = .5
end
-- This function gets called once every frame
function draw()
scr:draw()
end
function touched(t)
scr:touched(t)
end
Classtest = class()
function Classtest:init(x)
self.x = x
end
function Classtest:draw()
rect(WIDTH/2,HEIGHT/2,1000,1000)
end
