Changing to display object position in corona - lua

Question

I am new to programming this question might sound very simple.
I have created a object as a module called box
box = {}
m={}
m.random = math.random
function box:new(x,y)
box.on=false
local box = display.newRect(0,0,100,100)
box:setFillColor(m.random(120,200),m.random(120,200),m.random(120,200))
box.x = x
box.y = y
box.type = "box"
return box
end
return box
in my main.lua I want to create as many boxes and ,like an adventure game how can I switch two of the boxes position,example I click on one of them,then it is selected,and simply I click on the other one and they change position with each other.
Thanks in advance

Answer 1

I don't know Corona, but the general logic for what you're doing is this:
Add an event handler which allows you to detect when a box is clicked.
Add some way of tracking the selected box.
When a box is clicked:
if no box is yet selected, select the current box
if another box was previously selected, swap with the current box
if the already-selected box was clicked, ignore (or toggle off selected)
General idea (not sure if this is valid Corona event handling, but should get you close):
box = {}
m={}
m.random = math.random
-- track the currently selected box
local selected = nil
function box:new(x,y)
box.on=false
local box = display.newRect(0,0,100,100)
box:setFillColor(m.random(120,200),m.random(120,200),m.random(120,200))
box.x = x
box.y = y
box.type = "box"
function box:touch(event)
if not selected then
-- nothing is selected yet; select this box
selected = self
-- TODO: change this box in some way to visually indicate that it's selected
elseif selected == self then
-- we were clicked on a second time; we should probably clear the selection
selected = nil
-- TODO: remove visual indication of selection
else
-- swap positions with the previous selected box, then clear the selection
self.x, self.y, selected.x, selected.y
= selected.x, selected.y, self.x, self.y
selected = nil
end
end
return box
end