event.phase not detected in scrollListener of scrollview

Bazookas · November 19, 2013, 1:53pm

Hey,

I am currently using the CoronaSKD-2013.2076 - latest version of the CoronaSDK that includes Graphics 2.0 and have encountered a (for this project) big issue. The phases are not sent along.

Using following code I look at all the values in the event table

local scrollListener = function(event) for key,value in pairs(event) do print(key,value) end end slider = widget.newScrollView { top = 275, left = 0, width = display.contentWidth, height = 350, scrollWidth = 465, scrollHeight = 670, friction = 0, verticalScrollDisabled = true, listener = scrollListener, hideScrollBar = true, backgroundColor = {0,0,0,0} }

Only this is returned:

 target table: 0x7fb8de4202e0 direction right limitReached false

No phase is being sent with the event table. How can I fix this?

corona273 · November 19, 2013, 8:34pm

You can’t. It’s a bug in Corona SDK. You’re at least the fourth person to notice it, and there’s a discussion here as well:

http://forums.coronalabs.com/topic/41489-scrollview-eventphase-returns-nil/

I filed it as a bug yesterday afternoon (Case 28117) but have not received a response from Corona yet.

corona273 · November 19, 2013, 9:15pm

FYI, there’s Yet Another Thread (this one is in the daily builds section) noting this bug as well:

http://forums.coronalabs.com/topic/41361-daily-build-1260-broke-scrollview-listeners/

bjsorrentino · November 19, 2013, 9:42pm

Hi @corona273,

This fix will be rolled into a G2.0 daily soon. Thanks for bumping it.

Brent

alan_slane · November 28, 2013, 11:15pm

For anyone who doesn’t have a subscription to get the daily build with the fix, I hacked out a quick fix in the meantime:

local isBegan = true local scrollTimer &nbsp;&nbsp;&nbsp;&nbsp; -- ScrollView listener local function scrollListener( event ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; if(scrollTimer~=nil)then &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;timer.cancel(scrollTimer) &nbsp;&nbsp;&nbsp;&nbsp;end &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp; if(isBegan==true)then &nbsp; &nbsp; &nbsp; &nbsp; print("Phase Began") &nbsp; &nbsp; &nbsp; &nbsp; isBegan = false else print("Phase Moved") &nbsp; &nbsp; end &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;local function phaseEnded() &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;print("Phase Ended") &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;isBegan = true &nbsp;&nbsp;&nbsp;&nbsp;end scrollTimer=timer.performWithDelay(150,phaseEnded,1) end &nbsp;

If it’s a slow swipe, the began phase might be called multiple times…if this is happening, increase the timer from 150 to 200 or 300. Tweak around a bit, and you should get it good enough for the moment!

corona273 · November 19, 2013, 8:34pm