drawing

gistfile1.txt

-- Trial6

-- Use this function to perform your initial setup
supportedOrientations(LANDSCAPE_LEFT)
tt = nil

last_touch = nil
touching = nil
moving = false

function setup()
buttonImages={"Documents:Back","Documents:Eraser","Documents:BlackPencil","Documents:BrownPencil","Documents:BluePencil","Documents:RedPencil","Documents:GreenPencil","Documents:Next"}
button2Position = vec2(250,50) 
button3Position = vec2(350,50)
button4Position = vec2(450,50)
button5Position = vec2(550,50)
button6Position = vec2(650,50)
button7Position = vec2(750,50)
     button2= Button(buttonImages[2],button2Position)
     button3= Button(buttonImages[3],button3Position)
     button4= Button(buttonImages[4],button4Position)
     button5= Button(buttonImages[5],button5Position)
     button6= Button(buttonImages[6],button6Position)
     button7= Button(buttonImages[7],button7Position)
     
ColorFill = color(0, 0, 0, 255)
tt = Touches()
eraser = false
    
end

function draw()
    pushStyle()
    background(255, 255, 255, 255)
    
   button2:draw() button3:draw() button4:draw() button5:draw() button6:draw() button7:draw() 
    popStyle()
       -- default seems to be 0
    strokeWidth(2)
    lineCapMode(ROUND)
    tt.color = ColorFill
   
    touching = vec2(CurrentTouch.x, CurrentTouch.y)
if eraser == false and touching.y > 120 then
        
    
    if CurrentTouch.state == ENDED then
        -- to make sure we don't miss the touch began state
        moving = false
    elseif CurrentTouch.state == BEGAN then
        
            if touching ~= last_touch then
                moving = true
                last_touch = touching
                tt:add(touching)
                table.insert (touchedlocationtable,touching)
                
            end
    
            
    elseif CurrentTouch.state == MOVING then
        if touching ~= last_touch then
            if moving then
                tt:expand(touching)
                 table.insert (touchedlocationtable,touching)   
            else
                -- Did not detect the move
                moving = true
                tt:add(touching)
                    table.insert (touchedlocationtable,touching)
            end
            last_touch = touching
        end       
    end 
end  
    tt:draw()
     
    if eraser == true then
        
    tt:remove(touching)     
    end
        
end

function touched(tch)
   if button2:touched(tch)==true then eraser=true end
   if button3:touched(tch)==true then ColorFill = color(0, 0, 0, 255)  eraser=false end    
   if button4:touched(tch)==true then ColorFill = color(84, 61, 38, 255)  eraser= false end
   if button5:touched(tch)==true then ColorFill = color(21, 57, 187, 255) eraser= false end    
   if button6:touched(tch)==true then ColorFill = color(224, 26, 30, 255) eraser= false end
   if button7:touched(tch)==true then ColorFill = color(84, 210, 55, 255) eraser= false end  
           
end

gistfile2.txt

Button = class() 

function Button:init(buttonImage, buttonPosition)
      
    self.buttonImage = buttonImage
    self.buttonLocation = buttonPosition
    
    self.buttonImageSize = vec2(spriteSize(self.buttonImage))    
    self.currentButtonImage = self.buttonImage
 
    self.selected = false
end

function Button:draw()
     
    sprite(self.currentButtonImage, self.buttonLocation.x, self.buttonLocation.y)
    
end

function Button:touched(tch)   
    
    local currentTouchPosition = vec2(tch.x, tch.y)
    
    
      if (tch.state == ENDED) then
        if( (self.buttonLocation.x - self.buttonImageSize.x/2) < currentTouchPosition.x and
            (self.buttonLocation.x + self.buttonImageSize.x/2) > currentTouchPosition.x and
            (self.buttonLocation.y - self.buttonImageSize.y/2) < currentTouchPosition.y and
            (self.buttonLocation.y + self.buttonImageSize.y/2) > currentTouchPosition.y ) then
        
            return true end

    end 
end

-- touches code from codea
Touches = class()
function Touches:init()
    -- you can accept and set parameters here
    self.touches = {}
        self.color= color(0, 0, 0, 255)
end

function Touches:add(t)
    table.insert(self.touches, {t})
    
end

function Touches:expand(t)
    table.insert(self.touches[#self.touches],t)
    
end

function Touches:remove(t)
    local tablecounter = 1
    while tablecounter<= #self.touches do 
    table.remove(self.touches,tablecounter)
    tablecounter =  tablecounter  + 1
        end 
end

function Touches:draw()
    local last
    
    if #self.touches > 0 then
        for i,v in ipairs(self.touches) do
            last = v[1]
            for j,w in ipairs(v) do
                stroke(self.color)
                line(last.x,last.y,w.x,w.y)
                last = w
            end
        end
    end
end