I’m trying to build an increment/decrement bar (like a power indicator or somesuch). When the user clicks, the bar starts incrementing toward a max value, then reverses and heads toward the mininum. This should continue until the user clicks the screen again. However, there are some problems going on that I haven’t been able to figure out. Primarily, once the bar is started with a touch, the program seems to not be capable of receiving the touch to cancel the event. PLUS, the image position is not getting updated, even though its x attribute is being changed. CODE BELOW.
Help! 
local max = 200
local min = 0
local str = min
local adj = 1
local running = false
local interval = 0.5
-- strimage should float across the screen from min to max then back again
local strimage = display.newRect( 0, 0, 10, 10 )
lastTime = system.getTimer()
function calc\_bar()
if (system.getTimer() - lastTime) \> interval then
if (str + adj) \> max or (str + adj) \< min then
adj = -adj
end
str = str + adj
-- you can watch the value str change on the console
print(str)
-- BUT THE IMAGE DOES NOT MOVE until AFTER the timer is completed
-- it should move continuously until running == false :/
-- WHY DOESN'T strimage MOVE?
strimage.x = str
lastTime = system.getTimer()
end
end
function trigger\_bar(e)
if e.phase == "began" then
if running then
timer.cancel(tmr)
running = false
else
lastTime = system.getTimer()
-- I would like to use the following line, but it crashes because it takes over the system.
-- tmr = timer.performWithDelay(0,calc\_bar,0)
-- have to use this timer so it will at least end at some point
-- however, other touch events seem to be disabled as it runs :-(
tmr = timer.performWithDelay(0,calc\_bar,750000)
running = true
end
end
end
-- the first touch triggers calc\_bar to start running
-- however, subsequent touches (which should kill the timer) are not received!
Runtime:addEventListener( "touch" , trigger\_bar ) [import]uid: 61132 topic_id: 10711 reply_id: 310711[/import]