alertDialog bug with wacom tablet

keszegh

So the issue is that even though normally an alertdialog is 'above' everything and all touches are caught by it, if one uses a wacom tablet then the pen can click on anything on the screen when the dialog is active, which is a big problem for me (e.g. one can press the button that opens the dialog multiple times and so on).
please correct this, it causes severe issues in my app.

hgy29

Seems like something difficult to fix, I am not even sure we can fix it. Without understanding what goes on internally, I think you should prevent it at your side: put a catch all and discard sprite on top of your scene whenever you open an alert dialog.

keszegh

that i can do, but new issues always pop up due to this (i think) same issue that pen triggers both a mouse and pen event (i believe this is also related to that, i will check later what type of event is the one which is triggered during an alertdialog). i have already 3 or 4 workaround for different aspects, but they are not 100% fault-free.

in any case it would be great if you could check it out, perhaps it is not as hard as you think. thanks a lot.

keszegh

also for your suggested workaround, how would i modify the alertDialog class?
do i need to add/remove this dummy sprite for every single alertdialog in my app separately in the onComplete event? that would be pretty dirty solution.

keszegh

i tried the workaround this way, why doesn't it work?:

AlertDialogOld=AlertDialog AlertDialog.eventCatcher=Sprite.new() AlertDialog.eventCatcher:setStopEventPropagation(Sprite.EVENTMASK_MOUSE+Sprite.EVENTMASK_TOUCH+Sprite.EVENTMASK_KEY)   function AlertDialog:init(...) local alert=AlertDialogOld.new(arg) stage:addChild(AlertDialog.eventCatcher) function onComplete() alert:removeEventListener(Event.COMPLETE, onComplete, nil) AlertDialog.eventCatcher:removeFromParent() end alert:addEventListener(Event.COMPLETE, onComplete, nil) return alert end

rrraptor

Delete me xD

keszegh

then how would you change the AlertDialog class so that it puts an overlay sprite blocking touches while the dialog is open?

hgy29

Not sure why it doesn’t work, but you can’t return something from ‘init’. You should use Core.class to subclass AlertDialog

keszegh

maybe i'm getting stupid, but i cannot find out how one can override an init method that calls first the original method and then does something else. can you hint it?

keszegh

this seems to work:

AlertDialogOriginal=AlertDialog AlertDialog=Core.class(AlertDialogOriginal) AlertDialog.eventCatcher=Sprite.new() AlertDialog.eventCatcher:setStopEventPropagation(Sprite.EVENTMASK_MOUSE+Sprite.EVENTMASK_TOUCH+Sprite.EVENTMASK_KEY)   function AlertDialog:init(title,message,cancelButton,button1,button2) stage:addChild(AlertDialog.eventCatcher) function onComplete()   self:removeEventListener(Event.COMPLETE, onComplete, nil) AlertDialog.eventCatcher:removeFromParent() end self:addEventListener(Event.COMPLETE, onComplete, nil) end

keszegh

@hgy29 also i've checked and it's not too surprisingly the "penTablet" type event that is not caught during a dialog being open.

keszegh

i've realized that postInit is useful here so here is a somewhat more simple workaround:

eventCatcher=Sprite.new() eventCatcher:setStopEventPropagation(Sprite.EVENTMASK_MOUSE+Sprite.EVENTMASK_TOUCH+Sprite.EVENTMASK_KEY)   function TextInputDialog:postInit() stage:addChild(eventCatcher) local function onComplete() self:removeEventListener(Event.COMPLETE, onComplete, nil) eventCatcher:removeFromParent() end self:addEventListener(Event.COMPLETE, onComplete, nil) end   function AlertDialog:postInit() stage:addChild(eventCatcher) local function onComplete() self:removeEventListener(Event.COMPLETE, onComplete, nil) eventCatcher:removeFromParent() end self:addEventListener(Event.COMPLETE, onComplete, nil) end