if msg.isButtonPressed() error

Archived
1

I keep getting this error

255:     screen.Show()
256: while true
257: msg = wait(0, screen.GetMessagePort())
258:       if msg.isButtonPressed()
259:        ' print "Evt: msg.GetMessage();" idx:"; msg.GetIndex()
260:
261:                 if msg.GetIndex() = 1
262:            exit while
263:                 endif
264:                 if msg.GetIndex() = 2

/tmp/plugin/FPAAAA997H4h/pkg:/source/appMain.brs(258): runtime error ec: 'Dot' Operator attempted with invalid BrightScript Component or interface reference.

258:       if msg.isButtonPressed()

sometimes it will still load with it sometimes it wont

2

Sounds like you are getting invalid instead of an actual message, which was covered somewhat in http://forums.roku.com/viewtopic.php?f=34&t=31487. The simple solution is to throw another check that a valid event message was received (msg <> invalid).

3

is because there is no “then” in there?

ive had issues with them placed in the wrong spot

msg = wait(0, screen.GetMessagePort())
         if msg.isScreenClosed() then
                print "Screen closed"
                exit while
            else if msg.isButtonPressed()

or should the "then " be with the elseif msg.isButtonPressed() ?

4

The “then” of an if statement is optional, so that has no bearing. I was referring to the msg variable holding an invalid values, so something like this may be required:


msg = wait(0, screen.GetMessagePort())
if msg<>invalid then
    if msg.isScreenClosed() then
        print "Screen closed"
        exit while
    else if msg.isButtonPressed() 
        ... do something ...
    end if
end if
5

We have an open bug we can easily reproduce by hitting the Home button on a script that causes a wait() with a timeout of zero to return an invalid message. We consider this a bug on our part and will fix it.

Do you have another scenario that causes invalid to be returned from a wait() with a timeout of zero??

–Kevin