spawning PopupInput Dialogue

[lukas-runge]

Hey @hossimo and everyone else,

I am trying to spawn a PopupInput in the current MA3 Version (v1.4.0.2) but cant get it working.
I am trying the following example from the wiki:

lua 'local r = PopupInput("TITLE", display_handle, {{"str", "String", nil}, {"int","Number", 123}}, "123", 100, 200)'

What am I doing wrong?

Kind regards
@lukas-runge

[hossimo]

The issue is because the second argument of PopupInput() is looking for a display_handle.

In the system monitor you should notice an error like this:

It's not 1000% clear but what it is saying is the second argument is the wrong type. it's looking for a LUA lightuserdata object but instead it got something else, display_handle, which in this context is likely nil. In a proper LUA file you will notice that the main function of your program has a display_handle argument:

local function Main(display_handle,argument)
    local r = PopupInput("TITLE", display_handle, {{"str", "String", nil}, {"int","Number", 123}}, "123", 100, 200)
end

In this case display_handle passed in via the system to the main function of your program.

If PopupInput() worked with a nil value it was probably a bug that was fixed.

Two ways around this:

1) Get the display Handle

I had noticed some functions in the API like HandleToInt() and IntToHandle() that you could might be able to use to get the int value of the handle and use it on the command line. I have it a try in a lua file:

local function Main(display_handle,argument)
  Echo(HandleToInt(display_handle)) -- returned 838861405
end
return Main

Then I used this number on the command line:

lua 'local r = PopupInput("TITLE", IntToHandle(838861405), {{"str", "String", nil}, {"int","Number", 123}}, "123", 100, 200)'

And it worked, HOWEVER this number probably changes for each session, so you would need some way to find this number.

2) Use GetDisplayByIndex()

lua 'local r = PopupInput("TITLE",GetDisplayByIndex(1), {{"str", "String", nil}, {"int","Number", 123}}, "123", 100, 200)'

Some guessing on my part but I believe GetDisplayByIndex() returns a display handle for a 1 based display index number, so GetDisplayByIndex(1) returns the Display handle for display 1, again guessing on my part. you may want to ask on the forums to see if anyone answers.

Hope this helps.

[lukas-runge]

Thank you very much @hossimo! The missing display_handle made it work! 😍

Kind regards
@lukas-runge