event.keyName problem ..

Getting Started Newbie Questions
#1

when i used this code for 1 storyboard…

yeah its functioning but my concern is…

why this ‘function’ work 2 all storyboard…  i want only 1 storyboard to worked only,

any suggestion ?

tnx advance,

local function onKeyEvent( event )

if (event.keyName == “back”) and (system.getInfo(“platformName”) == “Android”) then
clickednext()

return true
end

return false
end

Runtime:addEventListener( “key”, onKeyEvent );

#2

When you put a listener on the global Runtime object, it’s available every where.  As long as the function onKeyEvent is still in memory it will continue to work.

I didn’t fully understand the problem, but

  1. If you only want it to work in one scene, then you have to add a:  Runtime:removeEventListener(“key”, onKeyEvent) in the exitScene() function.  Your addEventListener call should be in your enterScene() so that they can operate in pairs.

  2. If you want if functioning everywhere and it’s not, I would recommend you put the code in your main.lua and you would have to figure out what calls to make clickednext() work the way you want it to.

Rob

#3

sir its not working… its apply 2 all scene again…

    function scene:enterScene( event )
    local group = self.view

        local function onKeyEvent( event )
        if (event.keyName == “back”) and (system.getInfo(“platformName”) == “Android”) then
          clicknext()
        return true
    end
    end

    Runtime:addEventListener( “key”, onKeyEvent )

end

function scene:exitScene( event )
    local group = self.view
    Runtime:removeEventListener(“key”, onKeyEvent)
end

#4

Try moving the onKeyEvent function outside of enterScene.  Leave the Runtime inside.  You are running into a scoping issue.  In exitScene() it has no idea what onKeyEvent is so it’s passing a nil to the function and it can’t match up the original call.

Rob

#5

When you put a listener on the global Runtime object, it’s available every where.  As long as the function onKeyEvent is still in memory it will continue to work.

I didn’t fully understand the problem, but

  1. If you only want it to work in one scene, then you have to add a:  Runtime:removeEventListener(“key”, onKeyEvent) in the exitScene() function.  Your addEventListener call should be in your enterScene() so that they can operate in pairs.

  2. If you want if functioning everywhere and it’s not, I would recommend you put the code in your main.lua and you would have to figure out what calls to make clickednext() work the way you want it to.

Rob

#6

sir its not working… its apply 2 all scene again…

    function scene:enterScene( event )
    local group = self.view

        local function onKeyEvent( event )
        if (event.keyName == “back”) and (system.getInfo(“platformName”) == “Android”) then
          clicknext()
        return true
    end
    end

    Runtime:addEventListener( “key”, onKeyEvent )

end

function scene:exitScene( event )
    local group = self.view
    Runtime:removeEventListener(“key”, onKeyEvent)
end

#7

Try moving the onKeyEvent function outside of enterScene.  Leave the Runtime inside.  You are running into a scoping issue.  In exitScene() it has no idea what onKeyEvent is so it’s passing a nil to the function and it can’t match up the original call.

Rob